Objective: To see if PETCO2 reflects PaCO2 with acceptable accuracy. Methods: In this audit the anaesthetic chart of fifty consecutive patients, age 12 years and above undergoing craniotomy for intracranial pathology, were reviewed. Results: The difference between end tidal carbon dioxide (ETCO2) value corresponding to the time of taking the arterial sample and the PaCO2 was calculated. The mean end tidal CO2 was 29.3± 2.8 and the mean PaCO2 was 32.63± 4.5. The mean difference between the two values was calculated as 4.09 ± 3.0. The regression coefficient was 0.496, which showed a moderate association. A wide variability was observed in the results. Conclusion: Based on our results we recommend that arterial samples should be taken to determine PaCO2 in neurosurgical patients where maintenance of cerebral blood flow is crucial e.g. cerebral aneurysm surgery.
|Number of pages||3|
|Journal||Journal of the Pakistan Medical Association|
|Publication status||Published - Sept 2007|