Key result
Consumer-grade vascular dopplers match research-grade clinical dopplers for measuring limb occlusion pressure.
Why the study?
Blood flow restriction therapy requires individualized pressures to remain safe and effective, but how a consumer-grade vascular doppler compares to a research-grade clinical doppler for measuring limb occlusion pressure was unestablished.
Does a consumer-grade vascular doppler measure limb occlusion pressure equivalently to a research-grade clinical doppler in healthy young participants?
RCT (n=20)
Crossover
Does a consumer-grade vascular doppler measure limb occlusion pressure equivalently to a research-grade clinical doppler in healthy young participants?
A consumer-grade vascular doppler measures limb occlusion pressure as accurately as a research-grade clinical doppler in healthy young individuals, supporting its accessible use in blood flow restriction therapy.
Answers are grounded in this paper and cite their sources.
Device equivalence permits either vascular Doppler for limb occlusion pressure assessment; leaves open validation in broader cohorts.
Topics in Exercise Science and Kinesiology Volume 4: Issue 1, Article 7, 2023. The use of blood flow restriction is becoming more common and requires the use of individualized pressures in order to remain a safe and effective rehabilitation modality. Measuring limb occlusion pressure (LOP) allows the practitioner to set the restriction pressure so that full occlusion does not occur. Objective: Compare a research-grade clinical vascular doppler and a consumer-grade vascular doppler in the measurement of LOP. Design: A randomized crossover design measuring LOP in the upper and lower body. Methods: 20 participants (men=10) visited the laboratory on one occasion. Limb circumference in the arm and thigh was measured. Following 10 min of supine rest, LOP was measured either in the arm, using a 5 cm wide inelastic cuff, or in the leg, using a 10 cm wide inelastic cuff. Measurements were repeated at 5 min intervals until LOP had been measured in both limbs with both dopplers. Results: Bland-Altman analysis showed agreement between the two dopplers in both the upper body (mean bias: 0.6 (-1.3 – 2.4) mmHg) and lower body (mean bias: -1.5 (-4.4 – 1.4) mmHg). Two one-sided tests of equivalence determined that both dopplers measured a statistically equivalent LOP in the upper body (p = .547) and lower body (p = .288). Conclusions: In a healthy, young population, the consumer-grade vascular doppler measured LOP equally as well as the research-grade clinical doppler.
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Barrett et al. (2023) conducted an RCT in Healthy volunteers (n=20). Consumer-grade vascular doppler vs. Research-grade clinical vascular doppler was evaluated on Limb occlusion pressure (LOP) (Mean bias 0.6 mmHg (upper), -1.5 mmHg (lower), 95% CI -1.3 to 2.4 (upper), -4.4 to 1.4 (lower), p=0.547 (upper), 0.288 (lower)). A consumer-grade vascular doppler measured limb occlusion pressure equivalently to a research-grade clinical doppler in the upper (mean bias 0.6 mmHg) and lower body (mean bias -1.5 mmHg).
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