Abstract
Measurement of oxygen tensions by transcutaneous probes is complicated by the so-called stirring effect due to the existence of an oxygen diffusion gradient in the skin adjacent to the probe. The stirring effect is usually minimised by heating the transcutaneous probe to about 44°C. The elevated temperature does, however, increase the risk of skin burns and causes an unpredictable change inpO2 due to the right shift of the haemoglobin oxygen binding curve. We describe a new probe which has a low stirring effect at all temperatures in the interval between 38 and 44°C. The stirring effect is evaluated by measurement of an inert reference gas of known partial pressure.
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