Abstracts Posters SICOT-SOF meeting Gothenburg 2010 _2_

Poster
Topic: Sports Medicine - Tibia/Fibula
Abstract number: 25411
NEAR INFRARED SPECTROSCOPY IN DIAGNOSING CHRONIC
COMPARTMENT SYNDROME
Kajsa RENNERFELT, Qiuxia ZHANG, Jorma STYF
Department of Orthopaedics, University of Gothenburg, Sahlgrenska University
Hospital, Gothenburg (SWEDEN)
Near infrared spectroscopy (NIRS) measures muscle tissue oxygen saturation (StO2)
non- invasively and has been used in diagnosing chronic compartment syndrome
(CCS). We determined the diagnostic value of NIRS. We measured StO2 in the
anterior compartment of the leg in 22 patients (17 men, 5 women age 17-60 years
old) with CCS confirmed by elevated intramuscular pressure (IMP), and 5 healthy
subjects (3 men 2 women, 24-36 years old) before, during, and after an exercise test.
The patients and healthy subjects performed the exercise until muscle fatigue.
Baseline StO2 (100%) was defined as the value recorded at rest before exercise.
R90 was defined as time required for StO2 level to recover from 10% to 90% of its
final value. During exercise, the level of tissue oxygenation decreased relatively to
work intensity in both patients and subjects. R90 was 27 (12-70) seconds in the CCS
patients and 22 (8-34) seconds in healthy subjects. No significant difference was
found. The sensitivity of the test is 32% and specificity 80% at R90 >30 seconds.
Conlusion: Based on our results, NIRS alone is insufficient to establish the diagnosis
of CCS.
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