24.10.2014 Views

Tempo de Trombina - Medcorp

Tempo de Trombina - Medcorp

Tempo de Trombina - Medcorp

SHOW MORE
SHOW LESS

You also want an ePaper? Increase the reach of your titles

YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.

BC Thrombin Reagent<br />

Inten<strong>de</strong>d Use<br />

Reagent for the quantitative <strong>de</strong>termination of the thrombin time in citrated human plasma.<br />

Summary and Explanation<br />

The <strong>de</strong>termination of the thrombin time using BC Thrombin Reagent is suitable:<br />

1. for monitoring fibrinolysis therapy 1,2 ,<br />

2. for screening for disor<strong>de</strong>rs of fibrin formation and in cases of suspected severe<br />

fibrinogen <strong>de</strong>ficiency states 1,2 ,<br />

3. for differentiating between a heparin-induced prolongation of the thrombin time<br />

and fibrin formation disor<strong>de</strong>rs 1,2 .<br />

Prolonged thrombin times are measured both in patients with disor<strong>de</strong>rs of fibrin polymerization<br />

as well as during heparin treatment. Differentiation between these patient types<br />

can be achieved using Batroxobin Reagent (Da<strong>de</strong> Behring Marburg GmbH, Co<strong>de</strong> No.<br />

OUOV).<br />

Principle of the Method<br />

Thrombin converts the fibrinogen in the plasma sample into fibrin, thus producing a<br />

fibrin clot. The time taken for the fibrin clot to form is measured.<br />

Reagents<br />

Materials provi<strong>de</strong>d<br />

BC Thrombin Reagent, Testkit, Co<strong>de</strong> No. OWNA with<br />

10 x for 5 mL BC Thrombin Reagent<br />

1 x 50 mL Buffer Solution<br />

Composition<br />

BC Thrombin Reagent lyophilized: bovine thrombin, bovine albumin<br />

Buffer Solution for BC Thrombin Reagent: HEPES (25 mmol/l), pH 7.4<br />

Preservatives: 5-chloro-2-methyl-isothiazole-3-one (6 mg/l) and<br />

2-methyl-isothiazole-3-one (2 mg/l)<br />

Warnings and Precautions<br />

For in vitro diagnostic use.<br />

Preparation of the Reagent<br />

Reconstitute the contents of a vial of BC Thrombin Reagent in the labelled quantity of<br />

buffer solution. After reconstitution, as well as for every further use, the reagent solution<br />

must be warmed to +37 °C and maintained at this temperature for 15 minutes<br />

(not necessary if the BCS ® is used).<br />

Mix carefully once more before using.<br />

Storage and Stability<br />

Stored unopened at +2 to +8 °C, the BC Thrombin Reagent can be used up to the<br />

expiration date given on the label.<br />

Stability after reconstitution:<br />

at + 37 °C 8 hours<br />

at + 15 °C 48 hours<br />

at + 2 to +8 °C 7 days<br />

at -20 °C 1 month<br />

The reconstituted reagent can be frozen once in the original vial. The buffer solution is<br />

stable for 12 weeks at +2 to +25 °C once opened.<br />

Different coagulation analyzers have individual stability data.<br />

Instruments<br />

BC Thrombin Reagent can be used in a great number of coagulation analyzers.<br />

Observe the operating instructions issued by the analyzer’s manufacturer!<br />

Materials required but not provi<strong>de</strong>d<br />

Control Plasma N, Co<strong>de</strong> No. ORKE<br />

Da<strong>de</strong> ® Ci-Trol ® Level 1, Bestell-Nr. 291070*<br />

Coagulation analyzer (see Chapter titled ”Limitations of the Procedure”)<br />

Pipettes<br />

Plastic test tubes<br />

Distilled water<br />

* not available in the US<br />

Specimens<br />

To obtain the plasma, carefully mix 1 part sodium citrate solution (0.11 mol/l) with 9<br />

parts venous blood, avoiding the formation of foam. Centrifuge immediately at no less<br />

than 1,500 x g for at least 10 minutes. Remove supernatant plasma and store at +15<br />

to +25 °C until the test.<br />

Stability of the sample at +15 to +25 °C: 4 hours.<br />

Measure heparin-containing plasma samples within 2 hours.<br />

In the US please refer to the NCCLS Document H21-A2, entitled "Collection, Transport<br />

and Processing of Blood Specimens for Coagulation Testing and Performance of Coagulation<br />

Assays".<br />

Do not freeze the samples!<br />

Procedure<br />

Manual:<br />

Pipette into a test tube prewarmed to +37 °C:<br />

Citrated plasma 100 µL<br />

BC Thrombin Reagent (+37 °C) 250 µL<br />

On adding the reagent, <strong>de</strong>termine the coagulation time (e.g. time for the initial<br />

absorbance to increase by 0.06)<br />

Automatic:<br />

Special instructions for coagulation analyzers may be obtained from Da<strong>de</strong> Behring by<br />

request.<br />

Internal Quality Control<br />

Normal range: Control Plasma N<br />

Da<strong>de</strong> ® Ci-Trol ® Level 1<br />

Pathological range: Use a normal plasma adjusted to an appropriate concentration<br />

(e.g., 0.2 IU/mL) with the same form of heparin that is to<br />

be assayed in the sample to be tested. Multiple <strong>de</strong>terminations<br />

should be run to establish a confi<strong>de</strong>nce interval.<br />

A control should be measured at least every 8 hours on each testing day. Test<br />

control plasma in the same manner as patient samples.<br />

For a normal range control, the analytical value obtained must be within the assigned<br />

range given for the control in the lot-<strong>de</strong>pen<strong>de</strong>nt table of values.<br />

For a pathological range control, the value obtained should be within the confi<strong>de</strong>nce<br />

interval established by the laboratory.<br />

If the measured control value lies outsi<strong>de</strong> the confi<strong>de</strong>nce level previously established,<br />

then the coagulation analyzer and the reagents should be examined.<br />

Results<br />

The results are given in seconds.<br />

Limitations of the Procedure<br />

There are appropriate coagulation analyzers for which Da<strong>de</strong> Behring provi<strong>de</strong>s operating<br />

instructions. The utilization of BC Thrombin Reagent in other coagulation analyzers<br />

must be validated by the testing laboratory. In doing so, performance data other<br />

than that provi<strong>de</strong>d may be obtained.<br />

Carry-over of traces of thrombin may interfere with subsequent coagulation analyses.<br />

Therefore only single-use plastic materials should be used.<br />

Expected Values<br />

In a study of 39 citrated plasma samples from healthy adults using BC Thrombin Reagent<br />

on the BCT**, the calculated 95th percentile was <strong>de</strong>termined to be < 21 seconds.<br />

Systematic <strong>de</strong>viations from this range may be due to the instrument used. If necessary,<br />

the laboratory may have to establish its own reference interval.<br />

Specific Performance Characteristics<br />

Precision<br />

Over a five day period, precision studies (one run per day in replicates of eight) were<br />

performed by assaying normal and pathological control plasmas. For normal control plasmas<br />

(n = 40), the within-run precision ranged from 2.2 to 2.6%, while the total precision<br />

ranged from 3.8 to 4.7%. For a pathological control plasma (n = 24), the within-run precision<br />

was 6.2%, while the total precision was 7.4%.<br />

Method Comparison<br />

A method comparison study was performed with the BC Thrombin Reagent and<br />

another commercially available assay. A total of 67 patient plasma samples (20 from<br />

normal blood donors, 27 from patients un<strong>de</strong>rgoing heparin therapy, and 20 from patients<br />

with increased fibrin <strong>de</strong>gradation products) were tested by both methods. Regression<br />

analysis <strong>de</strong>termined a correlation coefficient of 0.93, a y-intercept of -5.55<br />

seconds and a slope of 1.48.<br />

Bibliography<br />

1. Sirridge, M.S. Laboratory evaluation of hemostasis. 2nd Ed. Phila<strong>de</strong>lphia: Lea &<br />

Febiger; 1974: 148<br />

2. Biggs, R. Human blood coagulation, haemostasis and thrombosis. 2nd Ed. Oxford:<br />

Blackwell Scientific Publications; 1976: 722<br />

Da<strong>de</strong> and Ci-Trol are registered tra<strong>de</strong>marks of Da<strong>de</strong> Behring, Inc. in the USA, Germany<br />

and other countries.<br />

BCS is a registered tra<strong>de</strong>mark of Da<strong>de</strong> Behring Marburg GmbH in the USA, in Germany<br />

and other countries.<br />

** BCT is a registered tra<strong>de</strong>mark of Da<strong>de</strong> Behring Marburg GmbH in Germany and<br />

other countries.<br />

Da<strong>de</strong> Behring Marburg GmbH<br />

Emil-von-Behring-Str. 76<br />

D-35041 Marburg<br />

www.da<strong>de</strong>behring.com<br />

USA Distributor:<br />

Da<strong>de</strong> Behring Inc.<br />

Newark, DE 19714 U.S.A.<br />

OWNA G11 E0540 (1111) H 1 Edition September 2003


BC-Thrombin-Reagenz<br />

Anwendungsbereich<br />

Reagenz zur quantitativen Bestimmung <strong>de</strong>r Thrombinzeit in humanem Citratplasma.<br />

Diagnostische Be<strong>de</strong>utung<br />

Die Bestimmung <strong>de</strong>r Thrombinzeit mit BC-Thrombin-Reagenz ist geeignet:<br />

1. zur Überwachung <strong>de</strong>r Fibrinolyse-Therapie 1,2 ,<br />

2. als Suchtest auf Störungen <strong>de</strong>r Fibrinbildung bzw. bei Verdacht auf schwere Fibrinogenmangelzustän<strong>de</strong><br />

1,2 ,<br />

3. zur Unterscheidung zwischen einer heparinbedingten Verlängerung <strong>de</strong>r Thrombinzeit<br />

und Fibrinbildungsstörungen 1,2 .<br />

Sowohl bei Störungen <strong>de</strong>r Fibrinpolymerisation als auch bei Vorliegen von Heparin<br />

wird eine verlängerte Thrombinzeit gemessen. Eine Differenzierung kann mit Hilfe<br />

<strong>de</strong>s Batroxobin-Reagenzes (Da<strong>de</strong> Behring Marburg GmbH, Bestell-Nr. OUOV) erfolgen.<br />

Prinzip <strong>de</strong>r Metho<strong>de</strong><br />

Thrombin wan<strong>de</strong>lt das in <strong>de</strong>r Plasmaprobe enthaltene Fibrinogen in Fibrin um,<br />

wodurch ein Gerinnsel entsteht. Es wird die Zeit bis zur Gerinnselbildung gemessen.<br />

Reagenzien<br />

Inhalt <strong>de</strong>r Han<strong>de</strong>lspackung<br />

BC-Thrombin-Reagenz, Testkit, Bestell-Nr. OWNA mit<br />

10 x für 5 ml BC-Thrombin-Reagenz<br />

1 x 50 ml Pufferlösung<br />

Zusammensetzung<br />

BC-Thrombin-Reagenz lyophilisiert: Thrombin vom Rind, Albumin vom Rind<br />

Pufferlösung für BC-Thrombin-Reagenz: HEPES (25 mmol/l), pH 7,4<br />

Konservierungsmittel: 5-Chlor-2-methyl-isothiazol-3-on (6 mg/l) und<br />

2-Methyl-isothiazol-3-on (2 mg/l)<br />

Warnungen und Vorsichtsmaßnahmen<br />

Nur zur in vitro diagnostischen Anwendung.<br />

Vorbereitung <strong>de</strong>r Reagenzien<br />

Inhalt einer Abfüllung BC-Thrombin-Reagenz mit <strong>de</strong>r auf <strong>de</strong>m Etikett angegebenen<br />

Menge Pufferlösung einlösen. Nach <strong>de</strong>m Einlösen und vor je<strong>de</strong>m weiteren Gebrauch<br />

ist die Reagenzlösung auf +37 °C zu erwärmen und 15 min lang bei dieser Temperatur<br />

zu halten (kann bei Verwendung am BCS ® entfallen). Vor Gebrauch noch einmal<br />

vorsichtig mischen.<br />

Haltbarkeit und Lagerungsbedingungen<br />

BC-Thrombin-Reagenz ist, ungeöffnet bei +2 bis +8 °C gelagert, bis zu <strong>de</strong>m auf <strong>de</strong>m<br />

Etikett angegebenen Datum verwendbar.<br />

Stabilität nach Rekonstitution:<br />

bei +37 °C 8 Stun<strong>de</strong>n<br />

bei +15 °C 48 Stun<strong>de</strong>n<br />

bei +2 bis +8 °C 7 Tage<br />

bei -20 °C 1 Monat<br />

Das gelöste Reagenz kann einmal in <strong>de</strong>r Originalflasche eingefroren wer<strong>de</strong>n.<br />

Die Stabilität <strong>de</strong>r Pufferlösung nach <strong>de</strong>m erstmaligen Öffnen beträgt bei +2 bis +25 °C<br />

12 Wochen.<br />

Die verschie<strong>de</strong>nen Gerinnungsmeßgeräte haben individuelle Stabilitätsdaten.<br />

Geräte<br />

BC-Thrombin-Reagenz kann mit einer Vielzahl von Gerinnungsmeßgeräten verwen<strong>de</strong>t<br />

wer<strong>de</strong>n.<br />

Bedienungsanleitung <strong>de</strong>s Geräteherstellers beachten!<br />

Zusätzlich benötigte Materialien<br />

Kontroll-Plasma N, Bestell-Nr. ORKE<br />

Da<strong>de</strong> ® Ci-Trol ® Level 1, Bestell-Nr. 291070*<br />

Gerinnungsmeßgerät (siehe Kapitel "Einschränkungen <strong>de</strong>r Testdurchführung")<br />

Pipetten<br />

Plastikröhrchen<br />

<strong>de</strong>stilliertes Wasser<br />

* nicht in <strong>de</strong>n USA erhältlich<br />

Untersuchungsmaterial<br />

Zur Plasmagewinnung 1 Teil Natriumcitrat-Lösung (0,11 mol/l) mit 9 Teilen Venenblut<br />

sorgfältig unter Vermeidung von Schaumbildung mischen. Sofort min<strong>de</strong>stens 10 min<br />

bei min<strong>de</strong>stens 1.500 x g zentrifugieren, überstehen<strong>de</strong>s Plasma abhebern und bis<br />

zum Test bei +15 bis +25 °C aufbewahren.<br />

Stabilität <strong>de</strong>r Probe bei +15 bis +25 °C: 4 Stun<strong>de</strong>n.<br />

Heparinhaltige Plasmen innerhalb von 2 Stun<strong>de</strong>n messen.<br />

In <strong>de</strong>n USA bitte auf das NCCLS Dokument H21-A2 mit <strong>de</strong>m Titel "Collection, Transport<br />

and Processing of Blood Specimens for Coagulation Testing and Performance of Coagulation<br />

Assays" beziehen.<br />

Proben nicht einfrieren!<br />

Testdurchführung<br />

Manuell:<br />

In ein auf +37 °C vorgewärmtes Teströhrchen pipettieren:<br />

Citratplasma 100 µl<br />

BC-Thrombin-Reagenz (+37 °C) 250 µl<br />

Mit Zugabe <strong>de</strong>s Reagenzes Gerinnungszeit (z. B. Zeit für die Zunahme <strong>de</strong>r<br />

Anfangsextinktion um 0,06) bestimmen<br />

Automatisch:<br />

Spezielle Vorschriften für Gerinnungsmeßgeräte sind von Da<strong>de</strong> Behring auf Anfrage<br />

erhältlich.<br />

Interne Qualitätskontrolle<br />

Normalbereich: Kontroll-Plasma N<br />

Da<strong>de</strong> ® Ci-Trol ® Level 1<br />

Pathologischer Bereich: Es ist ein Normalplasma, das mit einer geeigneten Konzentration<br />

(z.B. 0,2 IU/ml) <strong>de</strong>s zu messen<strong>de</strong>n Heparins<br />

aufgestockt wur<strong>de</strong>, einzusetzen. Zur Festlegung eines<br />

Vertrauensbereichs sind mehrere Bestimmungen durchzuführen.<br />

Min<strong>de</strong>stens alle 8 Stun<strong>de</strong>n an je<strong>de</strong>m Testtag sollten Kontrollen gemessen wer<strong>de</strong>n.<br />

Kontroll-Plasmen sind wie Patientenproben einzusetzen.<br />

Der Meßwert für die Normalkontrolle muß im Sollbereich liegen, <strong>de</strong>r in <strong>de</strong>r chargenabhängigen<br />

Wertetabelle <strong>de</strong>r Kontrolle angegeben ist.<br />

Der Wert für die pathologische Kontrolle sollte innerhalb <strong>de</strong>s im Labor ermittelten<br />

Vertrauensbereiches liegen.<br />

Liegt <strong>de</strong>r gemessene Kontrollwert außerhalb <strong>de</strong>s vorher festgelegten Vertrauensbereiches,<br />

sollten Gerinnungsmeßgerät und Reagenzien überprüft wer<strong>de</strong>n.<br />

Auswertung<br />

Das Meßergebnis wird in Sekun<strong>de</strong>n angegeben.<br />

Einschränkungen <strong>de</strong>r Testdurchführung<br />

Es sind Gerinnungsmeßgeräte geeignet, für die Da<strong>de</strong> Behring Anwendungsvorschriften<br />

bereitstellt. Die Verwendung von BC-Thrombin-Reagenz an an<strong>de</strong>ren Gerinnungsmeßgeräten<br />

muß vom Untersuchungslabor validiert wer<strong>de</strong>n. Dabei können<br />

an<strong>de</strong>re als die angegebenen Leistungsdaten erhalten wer<strong>de</strong>n.<br />

Eine Verschleppung von Spuren von Thrombin kann nachfolgen<strong>de</strong> Gerinnungsanalysen<br />

stören. Daher nur Einmal-Plastikmaterial verwen<strong>de</strong>n.<br />

Erwartete Werte<br />

In einer Studie an 39 Citratplasmen gesun<strong>de</strong>r Erwachsener wur<strong>de</strong> mit BC-Thrombin-<br />

Reagenz am BCT** eine 95. Perzentile von < 21 Sekun<strong>de</strong>n berechnet.<br />

Systematische Abweichungen von diesem Bereich können gerätebedingt sein. Gegebenenfalls<br />

muß ein eigener Referenzbereich durch das Labor erstellt wer<strong>de</strong>n.<br />

Leistungsmerkmale <strong>de</strong>s Tests<br />

Präzision<br />

Eine Präzisionsstudie wur<strong>de</strong> über fünf Tage an normalen und pathologischen Plasmen<br />

durchgeführt (8-fach-Bestimmungen pro Lauf). Für normale Kontroll-Plasmen (n<br />

= 40) lag die Präzision in <strong>de</strong>r Serie zwischen 2,2 und 2,6 %, die gesamte Präzision<br />

zwischen 3,8 und 4,7 %. Für ein pathologisches Plasma (n = 24) betrug die Präzision<br />

in <strong>de</strong>r Serie 6,2 %, die gesamte Präzision 7,4 %.<br />

Metho<strong>de</strong>nvergleich<br />

Ein Metho<strong>de</strong>nvergleich wur<strong>de</strong> mit BC-Thrombin-Reagenz und einer an<strong>de</strong>ren kommerziellen<br />

Thrombinzeit-Bestimmung durchgeführt. Insgesamt 67 Plasmen (20 von<br />

normalen Blutspen<strong>de</strong>rn, 27 von Patienten unter Heparin-Therapie und 20 von Patienten<br />

mit erhöhten Fibrinspaltprodukten) wur<strong>de</strong>n mit bei<strong>de</strong>n Metho<strong>de</strong>n untersucht. Eine<br />

Regressionsanalyse ergab einen Korrelationskoeffizienten von 0,93, einen y-Achsenabschnitt<br />

von -5,55 Sekun<strong>de</strong>n und eine Steigung von 1,48.<br />

Literatur<br />

siehe Seite 1.<br />

Da<strong>de</strong> und Ci-Trol sind eingetragene Marken <strong>de</strong>r Da<strong>de</strong> Behring Inc. in <strong>de</strong>n USA,<br />

Deutschland und an<strong>de</strong>ren Län<strong>de</strong>rn.<br />

BCS ist eine eingetragene Marke <strong>de</strong>r Da<strong>de</strong> Behring Marburg GmbH in <strong>de</strong>n USA,<br />

Deutschland und an<strong>de</strong>ren Län<strong>de</strong>rn.<br />

** BCT ist eine eingetragene Marke <strong>de</strong>r Da<strong>de</strong> Behring Marburg GmbH in Deutschland<br />

und an<strong>de</strong>ren Län<strong>de</strong>rn.<br />

Da<strong>de</strong> Behring Marburg GmbH<br />

Emil-von-Behring-Str. 76<br />

D-35041 Marburg<br />

www.da<strong>de</strong>behring.com<br />

OWNA G11 E0540 (1111) H 2 Ausgabe September 2003


BC Réactif Thrombine<br />

Domaine d’utilisation<br />

Réactif pour la détermination quantitative du temps <strong>de</strong> thrombine dans le plasma<br />

citraté humain.<br />

Intérêt diagnostique<br />

La détermination du temps <strong>de</strong> thrombine à l’ai<strong>de</strong> du BC Réactif Thrombine est indiquée<br />

:<br />

1. pour la surveillance <strong>de</strong>s traitements fibrinolytiques 1,2 ,<br />

2. comme test <strong>de</strong> dépistage <strong>de</strong>s troubles <strong>de</strong> la formation <strong>de</strong> fibrine ou en cas <strong>de</strong><br />

suspicion <strong>de</strong> déficit grave en fibrinogène 1,2 ,<br />

3. pour différencier entre un allongement du temps <strong>de</strong> fibrine dû à l’héparine et <strong>de</strong>s<br />

troubles <strong>de</strong> la formation <strong>de</strong> fibrine 1,2 .<br />

Le temps <strong>de</strong> thrombine est trouvé allongé aussi bien en cas <strong>de</strong> troubles <strong>de</strong> polymérisation <strong>de</strong> la<br />

fibrine qu’en présence d’héparine. La différenciation peut se faire en utilisant le Réactif Batroxobine<br />

(Da<strong>de</strong> Behring Marburg GmbH, co<strong>de</strong> OUOV).<br />

Principe <strong>de</strong> la métho<strong>de</strong><br />

La thrombine transforme le fibrinogène contenu dans l’échantillon plasmatique en<br />

fibrine, entraînant la formation d’un caillot. Le temps jusqu’à la formation du caillot est<br />

mesuré.<br />

Réactifs<br />

Conditionnement<br />

BC Réactif Thrombine, coffret, co<strong>de</strong> OWNA, contenant<br />

10 x pour 5 ml <strong>de</strong> BC Réactif Thrombine<br />

1 x 50 ml <strong>de</strong> Solution tampon<br />

Composition<br />

BC Réactif Thrombine, lyophilisé : thrombine et albumine bovines<br />

Solution tampon pour BC Réactif Thrombine : Hépès (25 mmol/l), pH 7,4<br />

Conservateurs : 5-chloro-2-méthyl-4-isothiazol-3-one (6 mg/l) et<br />

2-méthyl-4-isothiazol-3-one (2 mg/l)<br />

Mise en gar<strong>de</strong> et précaution d’emploi<br />

Réservé à un usage <strong>de</strong> diagnostic in vitro.<br />

Préparation <strong>de</strong>s réactifs<br />

Reconstituer le contenu d’un flacon <strong>de</strong> BC Réactif Thrombine avec le volume <strong>de</strong><br />

Solution tampon indiqué sur l’étiquette. Une fois reconstitué et avant toute utilisation,<br />

porter le réactif à +37 °C et le laisser 15 minutes à cette température (étape qui peut<br />

être négligée sur le BCS ® ). Agiter <strong>de</strong> nouveau avec précaution avant emploi.<br />

Stabilité et conditions <strong>de</strong> conservation<br />

Conservé à +2/+8 °C avant l’ouverture du flacon, le BC Réactif Thrombine peut être<br />

utilisé jusqu’à la date <strong>de</strong> péremption indiquée sur l’étiquette.<br />

Stabilité après reconstitution :<br />

à +37 °C 8 heures<br />

à +15 °C 48 heures<br />

à +2/+8 °C 7 jours<br />

à -20 °C 1 mois<br />

Le réactif reconstitué peut être congelé une fois dans son flacon d’origine.<br />

La stabilité <strong>de</strong> la Solution tampon conservée à +2/+25 °C après ouverture du flacon<br />

est <strong>de</strong> 12 semaines.<br />

Chaque appareil <strong>de</strong> coagulation a <strong>de</strong>s données <strong>de</strong> stabilité spécifiques.<br />

Appareils <strong>de</strong> coagulation<br />

Le BC Réactif Thrombine peut être utilisé sur un grand nombre d’appareils <strong>de</strong> coagulation.<br />

Respecter les instructions du manuel d’utilisation du fabricant <strong>de</strong> l’appareil !<br />

Autres réactifs et matériel nécessaires<br />

Plasma <strong>de</strong> contrôle N, co<strong>de</strong> ORKE<br />

Da<strong>de</strong> ® Ci-Trol ® Niveau 1, co<strong>de</strong> 291070*<br />

Appareil <strong>de</strong> coagulation (cf. paragraphe « Limites <strong>de</strong> réalisation du test »)<br />

Pipettes<br />

Tubes en plastique<br />

Eau distillée<br />

* non disponible aux USA<br />

Echantillons à tester<br />

Pour obtenir les échantillons plasmatiques, mélanger 1 volume <strong>de</strong> solution <strong>de</strong> citrate<br />

<strong>de</strong> sodium (0,11 mol/l) avec 9 volumes <strong>de</strong> sang veineux en évitant la formation <strong>de</strong><br />

mousse. Centrifuger immédiatement au moins 10 minutes à au moins 1 500 x g,<br />

prélever le plasma surnageant, et le conserver à +15/+25 °C jusqu’au moment du<br />

test.<br />

Stabilité <strong>de</strong> l’échantillon à +15/+25 °C : 4 heures.<br />

Tester les plasmas contenant <strong>de</strong> l’héparine dans les 2 heures.<br />

Aux USA, se reporter au document NCCLS H21-A2 « Collection, Transport and Processing<br />

of Blood Specimens for Coagulation Testing and Performance of Coagulation<br />

Assays ».<br />

Réalisation du test<br />

Métho<strong>de</strong> manuelle :<br />

Distribuer dans un tube à essai préchauffé à +37 °C :<br />

Plasma citraté 100 µl<br />

BC Réactif Thrombine (+37 °C) 250 µl<br />

A partir <strong>de</strong> la distribution du Réactif mesurer le temps <strong>de</strong> coagulation (par ex. temps<br />

écoulé pour une augmentation <strong>de</strong> <strong>de</strong>nsité optique <strong>de</strong> 0,06).<br />

Métho<strong>de</strong> automatique :<br />

Des adaptations spécifiques aux différents appareils <strong>de</strong> coagulation sont envoyées<br />

sur <strong>de</strong>man<strong>de</strong> par Da<strong>de</strong> Behring.<br />

Contrôle <strong>de</strong> qualité interne<br />

Domaine normal : Plasma <strong>de</strong> contrôle N<br />

Da<strong>de</strong> ® Ci-Trol ® Niveau 1<br />

Domaine thérapeutique : utiliser un plasma normal enrichi avec la concentration appropriée<br />

(par ex. 0,2 UI/ml) <strong>de</strong> l’héparine à mesurer. Pour<br />

déterminer un domaine <strong>de</strong> confiance, effectuer plusieurs<br />

dosages.<br />

Introduire <strong>de</strong>s contrôles au moins toutes les 8 heures sur une journée <strong>de</strong> travail.<br />

Traiter les contrôles comme <strong>de</strong>s échantillons <strong>de</strong> patients.<br />

La valeur mesurée pour le contrôle normal doit être trouvée à l’intérieur du domaine<br />

théorique indiqué dans le tableau <strong>de</strong>s valeurs du contrôle spécifique à chaque lot.<br />

La valeur mesurée pour le contrôle pathologique doit être trouvée à l’intérieur du<br />

domaine <strong>de</strong> confiance déterminé par le laboratoire.<br />

Si les valeurs obtenues sortent <strong>de</strong>s domaines <strong>de</strong> confiance correspondants, procé<strong>de</strong>r<br />

au contrôle <strong>de</strong>s réactifs et <strong>de</strong> l’appareil <strong>de</strong> coagulation utilisés.<br />

Exploitation<br />

Les résultats sont exprimés en secon<strong>de</strong>s.<br />

Limites <strong>de</strong> réalisation du test<br />

Da<strong>de</strong> Behring met à la disposition <strong>de</strong>s laboratoires <strong>de</strong>s protocoles d’adaptation pour<br />

tous les appareils <strong>de</strong> coagulation appropriés pour la réalisation du test. Si un laboratoire<br />

veut utiliser le BC Réactif Thrombine sur un autre appareil <strong>de</strong> coagulation, il<br />

<strong>de</strong>vra le vali<strong>de</strong>r préalablement. Des valeurs différentes <strong>de</strong> celles indiquées comme<br />

caractéristiques du test peuvent alors être obtenues.<br />

Un transfert <strong>de</strong> traces <strong>de</strong> thrombine peut perturber les analyses <strong>de</strong> coagulation ultérieures.<br />

Aussi ne doit-on utiliser que du matériel en plastique à usage unique.<br />

Valeurs attendues<br />

Une étu<strong>de</strong> portant sur 39 plasmas citratés <strong>de</strong> sujets sains a été effectuée avec le BC<br />

Réactif Thrombine sur le BCT**. Le 95ème percentile a été trouvé < 21 secon<strong>de</strong>s.<br />

Des déviations systématiques par rapport à ce domaine peuvent être dues à<br />

l’appareil utilisé. Eventuellement, le laboratoire <strong>de</strong>vra déterminer son propre domaine<br />

<strong>de</strong> référence.<br />

Caractéristiques du test<br />

Précision<br />

Une étu<strong>de</strong> <strong>de</strong> précision a été effectuée sur 5 jours avec <strong>de</strong>s plasmas normaux et<br />

pathologiques (8 dosages par série). Avec les plasmas <strong>de</strong> contrôle normaux (n = 40),<br />

la précision a été trouvée entre 2,2 et 2,6% pour la répétabilité, et entre 3,8 et 4,7%<br />

pour la précision globale. Avec les plasmas pathologiques (n = 24), la précision a été<br />

trouvée à 6,2% pour la répétabilité, et à 7,4% pour la précision globale.<br />

Comparaison avec une autre métho<strong>de</strong><br />

Une étu<strong>de</strong> comparative a été effectuée entre le BC Réactif Thrombine et un autre test<br />

<strong>de</strong> temps <strong>de</strong> thrombine du commerce. Au total, 67 plasmas ont été testés avec les<br />

<strong>de</strong>ux métho<strong>de</strong>s (20 provenant <strong>de</strong> donneurs <strong>de</strong> sang normaux, 27 <strong>de</strong> patients sous<br />

héparinothérapie et 20 <strong>de</strong> patients avec <strong>de</strong>s produits <strong>de</strong> dégradation <strong>de</strong> la fibrine<br />

augmentés). Une analyse <strong>de</strong> régression a donné un coefficient <strong>de</strong> corrélation <strong>de</strong><br />

0,93, une intersection <strong>de</strong> l’axe <strong>de</strong>s y à - 5,55 secon<strong>de</strong>s, et une pente <strong>de</strong> 1,48.<br />

Littérature<br />

Cf. page 1.<br />

Da<strong>de</strong> et Ci-Trol sont <strong>de</strong>s marques déposées <strong>de</strong> Da<strong>de</strong> Behring Inc. aux USA, en Allemagne<br />

et dans d’autres pays.<br />

BCS est une marque déposée <strong>de</strong> Da<strong>de</strong> Behring Marburg GmbH aux USA, en Allemagne<br />

et dans d’autres pays.<br />

** BCT est une marque déposée <strong>de</strong> Da<strong>de</strong> Behring Marburg GmbH en Allemagne et<br />

dans d’autres pays.<br />

Da<strong>de</strong> Behring Marburg GmbH<br />

Emil-von-Behring-Str. 76<br />

D-35041 Marburg<br />

www.da<strong>de</strong>behring.com<br />

OWNA G11 E0540 (1111) H 3 Edition Septembre 2003


BC Reagente <strong>Trombina</strong><br />

Settore d’impiego<br />

Reagente per la <strong>de</strong>terminazione quantitativa <strong>de</strong>l tempo di trombina nel plasma umano<br />

citratato.<br />

Significato diagnostico<br />

La <strong>de</strong>terminazione <strong>de</strong>l tempo di trombina con il BC Reagente <strong>Trombina</strong> è adatta per:<br />

1. il monitoraggio <strong>de</strong>lla terapia fibrinolitica 1,2 ;<br />

2. lo screening <strong>de</strong>i disturbi <strong>de</strong>lla fibrinogenesi o di sospetta carenza di fibrinogeno 1,2 ;<br />

3. la differenziazione tra un prolungamento <strong>de</strong>l tempo di trombina dovuto all’eparina<br />

ed altri disturbi <strong>de</strong>lla fibrinogenesi 1,2 .<br />

Sia nei disturbi <strong>de</strong>lla polimerizzazione <strong>de</strong>lla fibrina, sia in presenza di eparina, si osserva<br />

un tempo di trombina più lungo. Una differenziazione tra questi tipi di paziente<br />

si può avere con l’aiuto <strong>de</strong>l Reagente Batroxobina (Da<strong>de</strong> Behring Marburg GmbH,<br />

codice OUOV).<br />

Principio <strong>de</strong>l metodo<br />

La trombina trasforma in fibrina il fibrinogeno contenuto nel campione di plasma, per<br />

cui si forma il coagulo. Si <strong>de</strong>termina quindi il tempo di formazione <strong>de</strong>l coagulo.<br />

Reagenti<br />

Contenuto <strong>de</strong>lla confezione<br />

BC Reagente <strong>Trombina</strong>, kit, codice OWNA con<br />

10 x 5 mL BC Reagente <strong>Trombina</strong><br />

1 x 50 mL Soluzione tampone<br />

Composizione<br />

BC Reagente <strong>Trombina</strong>, liofilizzato: trombina bovina, albumina bovina.<br />

Soluzione tampone per BC Reagente <strong>Trombina</strong>: HEPES (25 mmol/L), pH 7,4.<br />

Conservanti: 5-cloro-2-metil-isotiazolo-3-one (6 mg/L)<br />

2-metil-isotiazolo-3-one (2 mg/L).<br />

Avvertenze e precauzioni<br />

1. Solo per uso diagnostico in vitro.<br />

Preparazione <strong>de</strong>i reagenti<br />

Ricostituire il contenuto di un flacone di BC Reagente <strong>Trombina</strong> con il quantitativo di<br />

soluzione tampone indicato sull’etichetta. Dopo ricostituzione e prima di qualsiasi<br />

uso, riscaldare la soluzione di reagente a +37 °C e mantenerla a questa temperatura<br />

per 15 minuti (non necessario se usata sul BCS ® ). Mescolare accuratamente ancora<br />

una volta prima <strong>de</strong>ll’uso.<br />

Conservazione e stabilità<br />

Il BC Reagente <strong>Trombina</strong> sigillato, conservato a +2/+8 °C, può essere utilizzato fino<br />

alla data di sca<strong>de</strong>nza indicata sull’etichetta.<br />

Stabilità dopo ricostituzione :<br />

a +37 °C 8 ore<br />

a +15 °C 48 ore<br />

a +2/+8 °C 7 giorni<br />

a -20 °C 1 mese<br />

Il reagente ricostituito può essere congelato, nella confezione originale, una sola<br />

volta. La stabilità <strong>de</strong>lla soluzione tampone, dopo l’apertura, è di 12 settimane se conservata<br />

a +2/+25 °C.<br />

I vari analizzatori per coagulazione hanno dati di stabilità individuali.<br />

Apparecchiature<br />

Il BC Reagente <strong>Trombina</strong> può essere utilizzato con vari analizzatori per coagulazione.<br />

Attenersi alle modalità d’uso indicate dal produttore <strong>de</strong>llo strumento.<br />

Altro materiale necessario<br />

Plasma di controllo N, codice ORKE<br />

Da<strong>de</strong> ® Ci-Trol ® , Livello 1, codice 291070*<br />

Analizzatore per coagulazione (v. capitolo "Limitazioni <strong>de</strong>lla esecuzione <strong>de</strong>l test").<br />

Pipette<br />

Provette in plastica<br />

Acqua distillata<br />

* non disponibile negli USA<br />

Campioni in esame<br />

Per la preparazione <strong>de</strong>l plasma, mescolare accuratamente 1 parte <strong>de</strong>lla soluzione di<br />

citrato di sodio (0,11 mol/L) con 9 parti di sangue venoso, evitando la formazione di<br />

schiuma. Centrifugare subito per almeno 10 min. a non meno di 1.500 x g.<br />

Rimuovere il plasma sopranatante e conservarlo a +15/+25 °C fino al momento <strong>de</strong>l<br />

test.<br />

Stabilità <strong>de</strong>l campione +15/+25 °C: 4 ore.<br />

Misurare il campione di plasma contenenti eparina entro 2 ore.<br />

Negli USA fare riferimento al documento NCCLS H-21-A2 dal titolo: "Collection,<br />

Transport and Processing of Blood Specimens for Coagulation Testing and Performance<br />

of Coagulation Assay"<br />

Non congelare i campioni!<br />

Esecuzione <strong>de</strong>l test<br />

Manuale:<br />

Pipettare in una provetta preriscaldata a +37 °C:<br />

Plasma citratato 100 µL<br />

BC Reagente <strong>Trombina</strong> (+37 °C) 250 µL<br />

All’aggiunta <strong>de</strong>l reagente, <strong>de</strong>terminare il tempo di formazione <strong>de</strong>l coagulo (per es.<br />

tempo di incremento <strong>de</strong>ll’estinzione iniziale di 0,06).<br />

Automatico:<br />

Presso la Da<strong>de</strong> Behring sono disponibili, su richiesta, speciali istruzioni per analizzatori<br />

per coagulazione.<br />

Controllo di qualità interno<br />

Intervallo normale: Plasma di controllo N<br />

Da<strong>de</strong> ® Ci-Trol ® Livello 1<br />

Intervallo patologico: Utilizzare un plasma normale tarato ad un’opportuna concentrazione<br />

(per es.: 0,2 UI/mL) con lo stesso tipo di eparina da<br />

testare nel campione in esame. E’ opportuno eseguire numerose<br />

<strong>de</strong>terminazioni per stabilire un intervallo di riferimento.<br />

I controlli dovrebbero essere misurati almeno 8 ore 8 durante il ciclo analitico. I plasmi<br />

di controllo vanno utilizzati nello stesso modo <strong>de</strong>i campioni.<br />

Per il controllo nell’intervallo normale, il valore ottenuto <strong>de</strong>ve trovarsi entro l’intervallo<br />

teorico riportato nella tabella <strong>de</strong>i valori lotto-dipen<strong>de</strong>nte.<br />

Per il controllo nell’intervallo patologico, il valore ottenuto dovrebbe trovarsi entro<br />

l’intervallo di accettabilità stabilito dal laboratorio.<br />

Se il valore misurato <strong>de</strong>l controllo si trova al di fuori <strong>de</strong>ll’intervallo di accettabilità prece<strong>de</strong>ntemente<br />

<strong>de</strong>terminato, l’analizzatore per coagulazione ed i reagenti <strong>de</strong>vono essere<br />

esaminati<br />

Risultati<br />

Il risultato viene espresso in secondi.<br />

Limitazioni <strong>de</strong>lla procedura<br />

Sono adatti analizzatori per coagulazione per i quali la Da<strong>de</strong> Behring fornisce le istruzioni<br />

d’uso. L’utilizzo <strong>de</strong>l BC Reagente <strong>Trombina</strong>, su altri analizzatori per coagulazione,<br />

<strong>de</strong>ve essere validato dal laboratorio che esegue il test. In questo caso si possono<br />

avere dati sulla performace diversi da quelli indicati. Un trascinamento di tracce di<br />

fibrina può interferire sulla successiva analisi coagulativa. Pertanto utilizzare materiale<br />

in plastica monouso.<br />

Valori attesi<br />

In uno studio di 39 campioni di plasma citratato di adulti sani, testati con il BC<br />

Reagente <strong>Trombina</strong> sul BCT**, il 95° percentile calcolato è stato < 21 secondi.<br />

Deviazioni sistematiche dall’intervallo indicato possono dipen<strong>de</strong>re dagli strumenti in<br />

uso. E’ opportuno che ogni laboratorio stabilisca un proprio intervallo di riferimento.<br />

Caratteristiche specifiche <strong>de</strong>l test<br />

Precisione<br />

Durante un periodo di cinque giorni, sono stati eseguiti studi di precisione (un test al<br />

giorno replicato otto volte), analizzando plasmi di controllo normali e patologici. Con<br />

plasmi di controllo normali (n = 40), la precisione intra-serie era compresa tra 2,2 e<br />

2,6%, mentre la precisione totale era compresa tra 3,8 e 4,7%. Con plasmi di controllo<br />

patologici (n = 24), la precisione intra-serie era <strong>de</strong>l 6,2%, mentre la precisione<br />

totale era <strong>de</strong>l 7,4%.<br />

Confronto tra metodi<br />

Uno studio di confronto tra metodi è stato eseguito con il BC Reagente <strong>Trombina</strong> ed<br />

un altro metodo disponibile in commercio. Un totale di 67 campioni di plasmi di paziente<br />

(20 da donatori di sangue normali, 27 da pazienti sottoposti a terapia eparinica e<br />

20 pazienti con prodotti di <strong>de</strong>gradazione <strong>de</strong>lla fibrina aumentati) sono stati testati con<br />

entrambi i metodi. L’analisi di regressione ha dato un coefficiente di correlazione di<br />

0,93, un’intercetta sull’asse Y di -5,55 secondi ed una pen<strong>de</strong>nza di 1,48.<br />

Bibliografia<br />

Vedi Pagina 1.<br />

Da<strong>de</strong> e Ci-Trol sono marchi registrati <strong>de</strong>lla Da<strong>de</strong> Behring Marburg GmbH Inc. negli<br />

USA, in Germania e negli altri Paesi.<br />

BCS è un marchio registrato <strong>de</strong>lla Da<strong>de</strong> Behring Marburg GmbH negli USA, in Germania<br />

e negli altri Paesi.<br />

** BCT è un marchio registrato <strong>de</strong>lla Da<strong>de</strong> Behring Marburg GmbH in Germania e<br />

negli altri Paesi.<br />

Da<strong>de</strong> Behring Marburg GmbH<br />

Emil-von-Behring-Str. 76<br />

D-35041 Marburg<br />

www.da<strong>de</strong>behring.com<br />

OWNA G11 E0540 (1111) H 4 Edizione Settembre 2003


Reactivo BC <strong>de</strong> trombina<br />

Campos <strong>de</strong> aplicación<br />

Reactivo para la <strong>de</strong>terminación cuantitativa <strong>de</strong>l tiempo <strong>de</strong> trombina en plasmas humanos<br />

citratados.<br />

Significado diagnóstico<br />

La <strong>de</strong>terminación <strong>de</strong>l tiempo <strong>de</strong> trombina con el Reactivo BC <strong>de</strong> trombina es apropiada:<br />

1. para el control la terapéutica fibrinolítica 1,2 ,<br />

2. como test <strong>de</strong> búsqueda <strong>de</strong> anomalías en la formación <strong>de</strong> la fibrina o cuando existe<br />

la sospecha <strong>de</strong> estados graves <strong>de</strong> <strong>de</strong>ficiencia <strong>de</strong> fibrinógeno 1,2 ,<br />

3. para distinguir entre una prolongación <strong>de</strong>l tiempo <strong>de</strong> trombina <strong>de</strong>bido a la heparina<br />

y trastornos en la formación <strong>de</strong> la fibrina 1,2 .<br />

Un tiempo <strong>de</strong> trombina prolongado se encuentra tanto en las anomalías <strong>de</strong> la polimerización<br />

<strong>de</strong> la fibrina como ante la presencia <strong>de</strong> heparina. Una diferenciación se pue<strong>de</strong><br />

llevar a cabo con la ayuda <strong>de</strong>l reactivo Batroxobina (Da<strong>de</strong> Behring Marburg<br />

GmbH, N° <strong>de</strong> pedido OUOV).<br />

Principio <strong>de</strong>l método<br />

La trombina transforma el fibrinógeno existente en la muestra <strong>de</strong> plasma en fibrina,<br />

originando así la formación <strong>de</strong> un coágulo. Se mi<strong>de</strong> el tiempo necesario para la formación<br />

<strong>de</strong> éste.<br />

Reactivos<br />

Contenido <strong>de</strong>l envase comercial<br />

Reactivo BC <strong>de</strong> <strong>Trombina</strong>, testkit, N° <strong>de</strong> pedido OWNA con<br />

10 x para 5 ml <strong>de</strong> Reactivo BC <strong>de</strong> trombina<br />

1 x 50 ml <strong>de</strong> Solución tampón<br />

Composición<br />

Reactivo BC <strong>de</strong> trombina, liofilizado: trombina bovina, albúmina bovina.<br />

Solución tampón para el Reactivo BC <strong>de</strong> trombina: HEPES (25 mmol/l), pH 7,4<br />

Agente <strong>de</strong> conservación: 5-cloro-2-metil-isotialzol-3-ona (6 mg/l) y<br />

2-metil-isotiazol-3-ona (2 mg/l)<br />

Advertencias y medidas <strong>de</strong> seguridad<br />

Sólo para ser utilizado en diagnósticos in vitro.<br />

Preparación <strong>de</strong> reactivos<br />

Disolver el contenido <strong>de</strong> un frasco <strong>de</strong> Reactivo BC <strong>de</strong> trombina con la cantidad <strong>de</strong><br />

solución tampón indicada en la etiqueta. Después <strong>de</strong> disolver y cada vez que se<br />

vuelva a usar la solución <strong>de</strong>l reactivo, calentarla a +37 °C y mantenerla a esta temperatura<br />

durante 15 min. (pue<strong>de</strong> no ser necesario al usar el BCS ® ). Mezclar cuidadosamente<br />

una vez más antes <strong>de</strong> usar.<br />

Estabilidad y almacenaje<br />

El Reactivo BC <strong>de</strong> trombina aún cerrado y conservado a una temperatura entre +2 y<br />

+8 °C pue<strong>de</strong> ser utilizado hasta la fecha <strong>de</strong> vencimiento dada en la etiqueta.<br />

Estabilidad <strong>de</strong>spués <strong>de</strong> la reconstitución:<br />

a +37 °C<br />

8 horas<br />

a +15 °C<br />

48 horas<br />

entre +2 y +8 °C 7 días<br />

a -20 °C<br />

1 mes<br />

El reactivo disuelto pue<strong>de</strong> ser congelado una vez en su envase original.<br />

La estabilidad <strong>de</strong> la solución tampón, una vez abierta y conservada entre +2 y +25 °C,<br />

es <strong>de</strong> 12 semanas.<br />

Los diferentes aparatos <strong>de</strong> medida <strong>de</strong> la coagulación tienen datos individuales <strong>de</strong><br />

estabilidad.<br />

Aparatos<br />

El Reactivo BC <strong>de</strong> trombina se pue<strong>de</strong> utilizar con un gran número <strong>de</strong> aparatos <strong>de</strong><br />

medida <strong>de</strong> la coagulación.<br />

Observe el manual <strong>de</strong> operaciones <strong>de</strong>l fabricante <strong>de</strong>l aparato!.<br />

Material adicional necesario<br />

Plasma control N, N° <strong>de</strong> pedido ORKE<br />

Da<strong>de</strong> ® Ci-Trol ® Nivel 1, N° <strong>de</strong> pedido 291070*<br />

Aparato <strong>de</strong> medida <strong>de</strong> la coagulación (Ver "Limitaciones <strong>de</strong>l procedimiento")<br />

Pipetas<br />

Tubos <strong>de</strong> ensayo<br />

Agua <strong>de</strong>stilada<br />

* no se consigue en USA<br />

¡No congelar las muestras!<br />

Procedimiento<br />

Manual:<br />

En un tubo <strong>de</strong> ensayo precalentado a +37 °C pipetear:<br />

Plasma citratado 100 µl<br />

Reactivo BC <strong>de</strong> trombina (+37 °C) 250 µl<br />

Al agregar el reactivo <strong>de</strong>terminar el tiempo <strong>de</strong> coagulación (por ej. tiempo en que la<br />

extinción inicial aumenta en 0,06)<br />

Automático:<br />

Instrucciones especiales para los aparatos <strong>de</strong> medida <strong>de</strong> la coagulación se pue<strong>de</strong>n<br />

obtener preguntando a Da<strong>de</strong> Behring.<br />

Control <strong>de</strong> calidad interno<br />

Rango normal: Plasma control N<br />

Da<strong>de</strong> ® Ci-Trol ® Nivel 1<br />

Rango patológico: Se emplea un plasma normal al cual se le ha agregado una concentración<br />

apropiada <strong>de</strong> la heparina que se va a medir (por ej.,<br />

0,2 UI/ml). Para fijar un rango <strong>de</strong> confianza se <strong>de</strong>ben realizar<br />

varias <strong>de</strong>terminaciones.<br />

Los controles se <strong>de</strong>ben medir por lo menos cada 8 horas en un día <strong>de</strong> trabajo. Los<br />

plasmas <strong>de</strong> control <strong>de</strong>ben ser tratados como las muestras <strong>de</strong> pacientes.<br />

Los valores medidos para el control normal <strong>de</strong>ben estar <strong>de</strong>ntro <strong>de</strong>l rango límite, el<br />

cual viene dado en la Tabla <strong>de</strong> valores <strong>de</strong>l control, <strong>de</strong>pendiente <strong>de</strong>l lote.<br />

El valor para el control patológico <strong>de</strong>be encontrarse <strong>de</strong>ntro <strong>de</strong>l rango <strong>de</strong> confianza<br />

<strong>de</strong>terminado por el laboratorio.<br />

Si el valor <strong>de</strong>l control medido se encuentra por fuera <strong>de</strong>l rango <strong>de</strong> confianza antes<br />

establecido, se <strong>de</strong>ben comprobar el aparato <strong>de</strong> medida <strong>de</strong> la coagulación y los reactivos.<br />

Valoración<br />

El resultado <strong>de</strong> la medida se da en segundos.<br />

Limitaciones <strong>de</strong>l procedimiento<br />

Existen aparatos <strong>de</strong> medida <strong>de</strong> la coagulación apropiados para los cuales Da<strong>de</strong><br />

Behring tiene listas las instrucciones <strong>de</strong> uso. El uso <strong>de</strong>l Reactivo BC <strong>de</strong> trombina en<br />

otros aparatos <strong>de</strong>be ser validado por el laboratorio <strong>de</strong> investigación. En este caso, se<br />

pue<strong>de</strong>n obtener valores diferentes a los dados para las características.<br />

Un transporte <strong>de</strong> trazas <strong>de</strong> trombina pue<strong>de</strong> alterar los siguientes análisis <strong>de</strong> la coagulación.<br />

De ser posible, use material plástico <strong>de</strong>sechable.<br />

Valores esperados<br />

En el estudio <strong>de</strong> 39 plasmas citratados <strong>de</strong> adultos sanos se calculó con el Reactivo<br />

BC <strong>de</strong> trombina en el BCT** un 95. percentile < 21 segundos.<br />

Las <strong>de</strong>sviaciones sistemáticas <strong>de</strong> este rango pue<strong>de</strong>n ser <strong>de</strong>pendientes <strong>de</strong>l aparato.<br />

En caso dado, el laboratorio <strong>de</strong>berá establecer su propio rango <strong>de</strong> referencia.<br />

Características <strong>de</strong>l test<br />

Precisión<br />

Se realizó un estudio <strong>de</strong> precisión durante cinco días con plasmas normales y patológicos<br />

(<strong>de</strong>terminaciones óctuplas pro marcha). Para plasmas <strong>de</strong> control normales (n =<br />

40) la precisión <strong>de</strong> la serie se encontró entre 2,2 y 2,6% y la precisión total entre 3,8<br />

y 4,7%. Para un plasma patológico (n = 24) la precisión en la serie fue <strong>de</strong> 6,2% y la<br />

precisión total <strong>de</strong> 7,4%.<br />

Comparación <strong>de</strong> métodos<br />

Se compararon el Reactivo BC <strong>de</strong> trombina y otro método comercial <strong>de</strong> <strong>de</strong>terminación<br />

<strong>de</strong>l tiempo <strong>de</strong> trombina. En total se investigaron con los dos métodos 67 plasmas<br />

(20 <strong>de</strong> donantes normales, 27 <strong>de</strong> pacientes bajo terapéutica con heparina y 20<br />

<strong>de</strong> pacientes con productos <strong>de</strong> <strong>de</strong>gradación <strong>de</strong> la fibrina elevados). En un análisis <strong>de</strong><br />

regresión se obtuvo un coeficiente <strong>de</strong> correlación <strong>de</strong> 0,93, un corte <strong>de</strong>l eje-y <strong>de</strong> -5,55<br />

segundos y una pendiente <strong>de</strong> 1,48.<br />

Literatura<br />

Ver página 1<br />

Da<strong>de</strong> y Ci-Trol son marcas <strong>de</strong> fábrica registradas <strong>de</strong> Da<strong>de</strong> Behring Inc. en USA,<br />

Alemania y otros países.<br />

BCS es una marca <strong>de</strong> fábrica registrada <strong>de</strong> Da<strong>de</strong> Behring Marburg GmbH en USA,<br />

Alemania y otros países.<br />

** BCT es una marca <strong>de</strong> fábrica registrada <strong>de</strong> Da<strong>de</strong> Behring Marburg GmbH en<br />

Alemania y otros países.<br />

Da<strong>de</strong> Behring Marburg GmbH<br />

Emil-von-Behring-Str. 76<br />

D-35041 Marburg<br />

www.da<strong>de</strong>behring.com<br />

Material a investigar<br />

Mezclar 1 parte <strong>de</strong> solución <strong>de</strong> citrato <strong>de</strong> sodio (0,11 mol/l) con 9 partes <strong>de</strong> sangre<br />

venosa, evitando la formación <strong>de</strong> espuma. Centrifugar inmediatamente <strong>de</strong>spués,<br />

durante 10 min. a aprox. 1500 x g. Recoger el plasma sobrenadante y conservarlo<br />

entre +15 y +25 °C hasta la realización <strong>de</strong>l test.<br />

Estabilidad <strong>de</strong> la muestra entre +15 y +25 °C: 4 horas.<br />

Las muestras que contengan heparina <strong>de</strong>berán ser medidas en un plazo <strong>de</strong> 2 horas.<br />

En USA por favor referirse a los documentos NCCLS H21-A2 con el título "Collection,<br />

Transport and Processing of Blood Specimens for Coagulation Testing and Performance<br />

of Coagulation Assays".<br />

OWNA G11 E0540 (1111) H 5 Edición Septiembre 2003


BC Reagente <strong>de</strong> trombina<br />

Campo <strong>de</strong> aplicação<br />

Reagente para a <strong>de</strong>terminação quantitativa do tempo <strong>de</strong> trombina no plasma humano<br />

citratado.<br />

Significado diagnóstico<br />

A <strong>de</strong>terminação do tempo <strong>de</strong> trombina com o BC Reagente <strong>de</strong> trombina é a<strong>de</strong>quada<br />

para<br />

1. monitorização da terapia fibrinolítica 1, 2 ;<br />

2. como rastreio das perturbações da formação da fibrina ou em caso <strong>de</strong> suspeita <strong>de</strong><br />

estados graves <strong>de</strong> <strong>de</strong>ficiência <strong>de</strong> fibrinogénio 1, 2 ;<br />

3. diferenciação entre o prolongamento do tempo <strong>de</strong> trombina induzido pela heparina<br />

e as perturbações <strong>de</strong> formação da fibrina 1, 2 .<br />

O prolongamento do tempo <strong>de</strong> trombina é medido tanto nas perturbações <strong>de</strong> polimerização<br />

da fibrina, como em presença da trombina. A diferenciação consegue-se<br />

usando o reagente <strong>de</strong> batroxobina (Da<strong>de</strong> Behring Marburg GmbH, ref. OUOV).<br />

Princípio metodológico<br />

A trombina converte o fibrinogénio contido na amostra em fibrina, através do qual se<br />

produz o coágulo. É medido o tempo que <strong>de</strong>corre até à formação do coágulo.<br />

Reagentes<br />

Conteúdo da embalagem comercial<br />

BC Reagente <strong>de</strong> trombina, kit <strong>de</strong> teste, ref. OWNA com<br />

10 x para 5 ml <strong>de</strong> BC Reagente <strong>de</strong> trombina<br />

1 x 50 ml <strong>de</strong> solução tampão<br />

Composição<br />

BC Reagente <strong>de</strong> trombina liofilizado: <strong>Trombina</strong> bovina e albumina bovina<br />

Solução tampão para o BC Reagente <strong>de</strong> trombina: HEPES (25 mmol/l), pH 7,4<br />

Conservante: 5-cloro-2-metil-4-isotiazol-3-on (6 mg/l)<br />

2-metil-4-isotiazol-3-on (2 mg/l).<br />

Advertências e medidas <strong>de</strong> precaução<br />

Só para uso diagnóstico in vitro.<br />

Preparação dos reagentes<br />

Dissolver o conteúdo <strong>de</strong> um frasco <strong>de</strong> BC Reagente <strong>de</strong> trombina com a quantida<strong>de</strong><br />

<strong>de</strong> solução tampão indicada no rótulo. Antes <strong>de</strong> dissolver e <strong>de</strong> cada uso, a solução do<br />

reagente <strong>de</strong>verá ser aquecida a +37 °C e mantida a essa temperatura durante 15<br />

minutos (po<strong>de</strong> ser suprimido no sistema BCS ® ). Antes <strong>de</strong> usar, misturar uma vez<br />

mais cuidadosamente.<br />

Estabilida<strong>de</strong> e condições <strong>de</strong> conservação<br />

Não aberto, o BC Reagente <strong>de</strong> trombina po<strong>de</strong> ser conservado entre +2 e +8 °C e<br />

utilizado até à data indicada no rótulo.<br />

Estabilida<strong>de</strong> após reconstituição:<br />

a +37 °C 8 horas<br />

a +15 °C 48 horas<br />

a +2 e +8 °C 7 dias<br />

a -20 °C 1 mês<br />

O reagente dissolvido po<strong>de</strong> ser congelado uma vez no frasco original.<br />

A estabilida<strong>de</strong> da solução tampão após abertura é <strong>de</strong> 12 semanas à temperatura <strong>de</strong><br />

+2 a + 25 °C.<br />

Os coagulómetros diferentes possuem características <strong>de</strong> estabilida<strong>de</strong> individuais.<br />

Instrumentos<br />

O BC Reagente <strong>de</strong> trombina po<strong>de</strong> ser utilizado numa multiplicida<strong>de</strong> <strong>de</strong> coagulómetros.<br />

Observar o manual <strong>de</strong> utilização do fabricante do aparelho!<br />

Outros materiais necessários<br />

Plasma <strong>de</strong> controlo N, ref. ORKE<br />

Da<strong>de</strong> ® Ci-Trol ® Level 1, ref. 291070*<br />

Coagulómetro (veja o capítulo "Limites <strong>de</strong> execução do teste")<br />

Pipetas<br />

Tubinhos <strong>de</strong> plástico<br />

Água <strong>de</strong>stilada<br />

* não está à venda nos EUA<br />

Material <strong>de</strong> análise<br />

Para a obtenção do plasma, misturar cuidadosamente 1 parte <strong>de</strong> solução <strong>de</strong> citrato<br />

<strong>de</strong> sódio (0,11 mol/l) com 9 partes <strong>de</strong> sangue venoso, evitando a formação <strong>de</strong> espuma.<br />

Centrifugar imediatamente a 1500 x g, durante 10 min. no mínimo, remover o<br />

plasma sobrenadante e conservar entre +15 e +25 °C até à execução do teste.<br />

Estabilida<strong>de</strong> da amostra entre +15 e +25 °C: 4 horas. Medir os plasmas com teor <strong>de</strong><br />

heparina num intervalo <strong>de</strong> 2 horas.<br />

Nos EUA, por favor reportar-se ao documento NCCLS H21-A2 com o título “Collection,<br />

Transport and Processing of Blood Specimens for Coagulation Testing and Performance<br />

of Coagulation Assays”.<br />

Não congelar as amostras!<br />

OWNA G11 E0540 (1111) H 6 Edição Setembro 2003<br />

Execução do teste<br />

Manual:<br />

Pipetar para um tubinho <strong>de</strong> ensaio pré-aquecido a +37 °C:<br />

Plasma citratado 100 µl<br />

BC Reagente <strong>de</strong> trombina 200 µl<br />

Com a adição do reagente, <strong>de</strong>terminar o tempo <strong>de</strong> coagulação (p.ex., para o aumento<br />

da absorvância inicial <strong>de</strong> 0,06).<br />

Automática:<br />

A pedido, a Da<strong>de</strong> Behring disponibiliza instruções especiais para coagulómetros.<br />

Controlo <strong>de</strong> qualida<strong>de</strong> interno<br />

Intervalo normal: Plasma <strong>de</strong> controlo N<br />

Da<strong>de</strong> ® Ci-Trol ® Level 1<br />

Intervalo patológico: Deverá ser utilizado um plasma normal ao qual foi adicionada a<br />

concentração a<strong>de</strong>quada (p. ex. 0,2 IU/ml) da heparina a medir.<br />

Para a <strong>de</strong>terminação do intervalo <strong>de</strong> referência, <strong>de</strong>verão ser<br />

executadas várias <strong>de</strong>terminações.<br />

O controlo <strong>de</strong>verá ser medido em cada dia <strong>de</strong> teste, todas as 8 horas, no mínimo. Os<br />

plasmas <strong>de</strong> controlo <strong>de</strong>verão ser tratados como a amostras do paciente.<br />

O valor medido para o controlo normal <strong>de</strong>verá situar-se no intervalo nominal indicado<br />

na tabela <strong>de</strong> valores do controlo <strong>de</strong>pen<strong>de</strong>ntes dos lotes.<br />

O valor do intervalo patológico <strong>de</strong>verá situar-se no intervalo <strong>de</strong> confiança <strong>de</strong>terminado<br />

no laboratório.<br />

Se o valor <strong>de</strong> controlo medido se situar fora do intervalo <strong>de</strong> confiança <strong>de</strong>finido anteriormente,<br />

é necessário verificar o coagulómetro e os reagentes.<br />

Avaliação<br />

O resultado medido é indicado em segundos.<br />

Limites <strong>de</strong> execução do teste<br />

São a<strong>de</strong>quados coagulómetros para os quais a Da<strong>de</strong> Behring disponibiliza instruções<br />

<strong>de</strong> utilização. A utilização do BC Reagente <strong>de</strong> trombina noutros coagulómetros<br />

tem <strong>de</strong> ser validada pelo laboratório da análise. Neste caso, po<strong>de</strong>m obter-se<br />

outras características <strong>de</strong> performance que não as indicadas.<br />

A protelação dos vestígios <strong>de</strong> trombina po<strong>de</strong> interferir nas análises <strong>de</strong> coagulação<br />

seguintes. Por isso, utilizar unicamente material <strong>de</strong> plástico <strong>de</strong>scartável.<br />

Valores expectáveis<br />

Num estudo <strong>de</strong> 39 plasmas citratados <strong>de</strong> adultos saudáveis usando o BC Reagente<br />

<strong>de</strong> trombina no sistema BCT**, foi calculado um 95.º percentil < 21 segundos.<br />

Os <strong>de</strong>svios sistemáticos <strong>de</strong>stes intervalos po<strong>de</strong>m ser induzidos pelo aparelho. Se for<br />

necessário, o laboratório <strong>de</strong>verá estabelecer um intervalo <strong>de</strong> referência próprio.<br />

Características <strong>de</strong> performance do teste<br />

Precisão<br />

Foi realizado um estudo <strong>de</strong> precisão com plasmas normais e plasmas patológicos,<br />

durante cinco dias (<strong>de</strong>terminações óctuplas por série). Para os plasmas <strong>de</strong> controlo<br />

normais (n = 40) a precisão na série situou-se entre 2,2 e 2,6% e a precisão total<br />

entre 3,8 e 4,7%. Para o plasma patológico (n = 24) a precisão na série foi <strong>de</strong> 6,2%<br />

e a precisão total <strong>de</strong> 7,4%.<br />

Comparação <strong>de</strong> métodos<br />

Foi efectuada uma comparação do BC Reagente <strong>de</strong> trombina com um outro reagente<br />

comercial para <strong>de</strong>terminação do tempo <strong>de</strong> trombina. Com os dois métodos foi<br />

examinado um total <strong>de</strong> 67 plasmas (20 <strong>de</strong> dadores <strong>de</strong> sangue normais, 27 <strong>de</strong> pacientes<br />

sujeitos a terapia heparínica e 20 <strong>de</strong> pacientes com um aumento <strong>de</strong> produtos <strong>de</strong><br />

<strong>de</strong>gradação da fibrina). A análise <strong>de</strong> regressão forneceu um coeficiente <strong>de</strong> correlação<br />

<strong>de</strong> 0,93, uma intersecção axial y <strong>de</strong> -5,55 segundos e uma inclinação <strong>de</strong> 1,48.<br />

Bibliografia<br />

Veja a página 1.<br />

Da<strong>de</strong> e Ci-Trol são marcas registadas da Da<strong>de</strong> Behring Inc. nos EUA, Alemanha e<br />

noutros países.<br />

BCS é uma marca registada da Da<strong>de</strong> Behring Marburg GmbH nos EUA, Alemanha e<br />

noutros países.<br />

** BCT é uma marca registada da Da<strong>de</strong> Behring Marburg GmbH na Alemanha e<br />

noutros países.<br />

IVD<br />

LOT<br />

EXP<br />

CCYY-MM-DD<br />

REF<br />

Da<strong>de</strong> Behring Marburg GmbH<br />

Emil-von-Behring-Str. 76<br />

D-35041 Marburg<br />

www.da<strong>de</strong>behring.com<br />

Symbols Key / Symbolschlüssel / Explication <strong>de</strong>s Symboles /<br />

Interpretazione simboli / Clave <strong>de</strong> los Símbolos / Chave dos Símbolos<br />

Manufactured by / Hergestellt von / Fabriqué par / Prodotto da / Fabricado por<br />

In Vitro Diagnostic Medical Device / In Vitro Diagnosticum / Dispositif Médical<br />

Diagnostic In Vitro / Dispositivo Medico per Diagnostica In Vitro / Producto sanitario<br />

para Diagnóstico In Vitro<br />

Lot Number / Chargenbezeichnung / Numéro <strong>de</strong> Lot / Numero di Lotto / Número <strong>de</strong><br />

Lote<br />

Expiration Date / Verfalldatum / Date <strong>de</strong> Péremtion / data di sca<strong>de</strong>nza / Fecha <strong>de</strong><br />

vencimiento / termo da valida<strong>de</strong><br />

Storage Temperature / Lagertemperatur / Température <strong>de</strong> Conservation / Temperatura<br />

di conservazione / Temperatura <strong>de</strong> almacenamiento / Temperatura <strong>de</strong> armazenagem<br />

CE Mark / CE-Zeichen / Marquage CE / Marchio CE / CE Marca / Marca CE<br />

Catalogue Number / Katalog Nummer / Référence / Codice Catalogo / Número <strong>de</strong><br />

Catálogo<br />

Consult Instructions for Use / Gebrauchsanweisung beachten / Consulter la Notice<br />

d'Utilisation / Istruzioni per l'uso / Consultar Instucciones para el Uso / Consulte as<br />

Instruções <strong>de</strong> Utilização

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!