Abstract

Rapid changes in arterial pH are common in critcally ill patients and may only be observed if frequent blood samples are taken. This has obvious disadvantages and so recently there has been in-creaseing interest in the development of continous measuring techniques. Various studies have already been published on the monitoring of skeletal muscle pH (pHm) and its relationship to tissue perfusion.(1–5) Animal and human studies have shown that pHm varies directly with arterial blood pH (pHa). That pHm varies directly with arterial blood pH (pHa) , and that pHm decreases in hypovolemic states and in states of diminished peripheral perfusion of other causes.(6–8) The pH probes that were used in this work were, however, cumbersome and difficult to position.

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