Farmacologie van de inhalatie-anesthetica

Farmacologie van de inhalatie-anesthetica Farmacologie van de inhalatie-anesthetica

14.02.2014 Views

Nitrous oxide • 30 maal meer oplosbaar in bloed dan stikstof: diffusie naar luchthoudende holten met volume-expansie of drukstijging: gasembolen, pneumo-encephalon, pneumothorax, darmen, middenoor… • Volume of pneumothorax will double in 10 min when 70 % N2O is given • Stop immediately with N2O administration if air embolism occurs • Beware with the use of N2O in cavity surgery • Nitrous oxide and intra-ocular gas !!!!! • Nitrous oxide and endoscopic surgery in general : combustion ? ( N2O for establishing e.g. pneumoperitoneum )

Nitrous oxide: circulatoire effecten • verhoogt de sympathische tonus: • hogere noradrenaline concentraties • toegenomen perifere weerstand • lichte daling hartdebiet • minder bloeddrukdaling dan met MAC- equivalent van volatiele anesthetica • renale / splanchnische vasoconstrictie Nitrous oxide: andere orgaan effecten • No inhibition of HPV but rather increase in PVR • cerebraal: verhoging CMR, CBF, ICP • Zeer beperkte spierrelaxatie

Nitrous oxi<strong>de</strong>: circulatoire effecten<br />

• verhoogt <strong>de</strong> sympathische tonus:<br />

• hogere noradrenaline concentraties<br />

• toegenomen perifere weerstand<br />

• lichte daling hart<strong>de</strong>biet<br />

• min<strong>de</strong>r bloeddrukdaling dan met MAC- equivalent <strong>van</strong><br />

volatiele <strong>anesthetica</strong><br />

• renale / splanchnische vasoconstrictie<br />

Nitrous oxi<strong>de</strong>: an<strong>de</strong>re orgaan effecten<br />

• No inhibition of HPV but rather increase in PVR<br />

• cerebraal: verhoging CMR, CBF, ICP<br />

• Zeer beperkte spierrelaxatie

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