• R C Tasker and M J Peters.
• Department of Paediatric Intensive Care, Great Ormond Street Hospital for Children, London, UK.
• Intensive Care Med. 1998 Jun 1; 24 (6): 616-9.

AbstractWe describe a patient with combined meningococcal septicemia and meningitis, cerebral edema and acute respiratory distress syndrome, in whom we balanced the conflicting carbon dioxide strategies for optimal pulmonary and neurological management using jugular oxygen saturation (SjvO2) monitoring to identify the upper limit of "tolerable" hypercapnia. Our observations suggest that significant acidosis was not well tolerated; however, cautious induction of pH down to 7.32 and an arterial carbon dioxide tension (PaCO2) < 5.9 kPa was tolerated acutely without significant cerebral hyperemia. Moreover, with the development of metabolic compensation and normal pH, higher levels of PaCO2 could be permitted. In similar cerebro-pulmonary circumstances we suggest that these findings warrant consideration. Alternatively, invasive monitoring of SjvO2 could be undertaken so that patient-specific criteria for permissive hypercapnia can be determined.

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