Measurement of transcutaneous oxygen (TCOM or TcPO 2 ) is a non-invasive method for measuring oxygen levels of tissue under the skin. Because oxygen is carried by the blood, TCOM can be used as an indirect measure of blood flow to the tissues. Because blood flow is important for wound healing, TCOM is often used to measure the ability of tissues to effectively heal.
To perform a test, a set of electrodes is placed on a viable network (eg chest) as a control and a second set is placed around the corresponding network (eg legs or legs). The electrode may slightly heat up the skin to increase blood flow to the area. Oxygen can also be given to patients to see if it increases oxygen levels in the tissues. This test takes about 45 minutes. The results are reported as the absolute value of the network in question (in mmHg) or as the ratio of the network being questioned to the control network. Normal oxygen tension in the legs is about 60 mmHg and the normal chest/leg ratio is about 0.9. Many factors can limit the accuracy of tests including edema, temperature, inflammation, drugs, and stress. In addition to the measurement being normal, all parts of the oxygenation pathway should function: the lungs must be able to oxygenate the blood, the heart must be able to pump blood, and patent arteries should be able to carry blood to the blood. skin.
Without comorbitas, the wound is considered to be cured if the pressure of oxygen & gt; 40 mmHg. In the presence of comorbidities, such as diabetes or edema, a higher value may be necessary. Patients with oxygen pressure & lt; 20 mmHg tends to require revascularization to promote adequate wound healing. The TCOM level required for adequate wound healing remains controversial.
Video Transcutaneous oxygen measurement
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Source of the article : Wikipedia