Transcutaneous PO2 Response to Transient Arterial Occlusion In Peripheral Vascular Disease Detected by Heating Power Oximeter

• Published in: Angiology Vol. 52; no. 12; pp. 851 - 857
• Main Author: Frau, Giuseppe
• Format: Journal Article
• Language: English
• Published: Thousand Oaks, CA SAGE Publications 01-12-2001; Westminster
• Subjects: Aged; Arterial Occlusive Diseases - diagnosis; Arterial Occlusive Diseases - physiopathology; Biological and medical sciences; Cardiovascular system; Humans; Investigative techniques of hemodynamics; Investigative techniques, diagnostic techniques (general aspects); Male; Medical sciences; Middle Aged; Oximetry - methods; Oxygen - analysis; Human; Blood gas; Claudication; Oxymetry; Pathophysiology; Walking distance; Cardiovascular disease; Exploration; Transcutaneous oxygen pressure; Hand; Foot; Arterial disease; Vascular disease; Intermittent; Limb; Occlusive arterial disease; Diagnosis; Hemodynamics
• ISSN: 0003-3197; 1940-1574
• DOI: 10.1177/000331970105201207

Transcutaneous PO 2 (TcpO2) was measured in 30 patients with peripheral arterial obstructive disease (PAOD) and in 30 age-matched controls in the hand and foot using a heating power electrode oximeter (HP-E). The HP-E was connected with a software modified monitor to simul taneously record changes in arterial stasis in the skin (TcpO 2 mm Hg) and in the underlying tissue 3.5 to 4 mm from the HP-E (TcpO 2 mW). In the hands of patients with PAOD, the following was found, lower mean values of the rest flow (R-F) and of the recovery area (Rc-Ar); delayed appearance of both a PO2 decrease after the start of stasis (ODT) and the increased value after the cuff deflation (ORT); and little relevance of flow changes in the tissues under the HP-E. In the foot homolateral to the obstructive lesion, the hemodynamic effects of the stasis were not consistently a result of circulatory insufficiency. In light-medium PAOD the correlation was more significant with the walking-free distance (WFD). However in severe PAOD, the perfusion was usually depressed and the variable values tended to flatten. This study confirmed the diagnostic reliability of this test in PAOD patients. Furthermore simulta neous exploration of two microvessel levels increased its diagnostic possibilities.