Abstract:
:The relation of transcutaneous pO2 (tcpO2) and cutaneous blood flow (CBF) was measured on the forearm of 19 healthy volunteers by use of a tcpO2 electrode heated to 45 degrees C. CBF was estimated indirectly from the heating power of the electrode (HP) and with a 8 MHz bidirectional ultrasonic probe by Doppler shift in a fingertip warmed to 45 degrees C (DF). Arterial blood flow was regulated by a cuff on the upper arm. The arterial flow was reduced in 10-15% stages of effective perfusion pressure Peff. There was a decrease in pO2 when CBF was restricted in stages as suggested by the model of the "circulatory hyperbola" according to Lübbers. A linear dependence between Peff, HP and DF was observed. These results indicate, that there is no autoregulation in the hyperemizied capillary bed. During respiration of air mean tcpO2 was 86.0 Torr (+/- 6.2) in normal blood flow conditions and reflects well paO2. Transcutaneous pO2 may also be used as a measure of CBF. To distinguish between these two modes, the determination of paO2 in capillary blood probes is necessary for calculating the transcutaneous index tcpO2/paO2.
journal_name
Adv Exp Med Bioljournal_title
Advances in experimental medicine and biologyauthors
Steinacker JM,Spittelmeister W,Wodick Rdoi
10.1007/978-1-4613-1927-6_48subject
Has Abstractpub_date
1987-01-01 00:00:00pages
263-8eissn
0065-2598issn
2214-8019journal_volume
220pub_type
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