Effect of patient positioning on toe pressure measurement using noninvasive vascular testing

British Journal of Community Nursing
Laura E SansostiAndrew J Meyr

Abstract

Interpretation of digital pressure in the assessment of healing potential for diabetic foot disease has become common because of the potential for false elevation with the ankle-brachial index. However, the specific testing protocol for segmental Doppler examinations and photoplethysmography require patients to be in the supine position, with the lower limbs at heart level, in order to minimise the effect of hydrostatic pressure. This may be difficult in many patients with lower extremity pathology, particularly those who are nonambulatory, with painful wounds, or with orthopnea. In these situations, the noninvasive vascular test may be performed with the patient in a more comfortable position, which may include sitting in a wheelchair with the leg in a dependent position. The objective of this investigation was to evaluate the effect of patient positioning on measurement of the digital pressure. Hallux pressures were measured in 20 healthy volunteers in 3 variable positions of limb dependency. The mean±standard deviation of digital pressure for subjects while lying supine with the limb at heart level was 103.5±26.0 mmHg (the recommended position for performance of the test), while sitting upright with the limb level on the tab...Continue Reading

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Citations

Feb 23, 2019·Blood Pressure Monitoring·Robert Trevethan
Dec 19, 2017·Scandinavian Journal of Clinical and Laboratory Investigation·Robert Trevethan

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