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Article Dans Une Revue Annals of Vascular Surgery Année : 2024

Test-retest Reliability and Minimal Detectable Change in Exercise Oximetry in Claudicants

Résumé

BACKGROUND: Exercise transcutaneous oxygen pressure measurement (Exercise-TcPO2) can be used to diagnose Lower Extremity Artery Disease (LEAD) and allows the quantification of limb ischemia during exercise on treadmill. Exercise-TcPO2 test-retest reliability in patients with LEAD and severe walking impairment is unknown. The aim of this study was to evaluate the test-retest reliability, standard error of measurement (SEM), and Minimal Detectable Change (MDC) of exercise-TcPO2 in patients with claudication. METHODS: Data were collected from patients that performed 2 treadmill tests within a 1-month interval. Delta from Rest of Oxygen Pressure (DROP) values were measured at both buttocks (proximal) and both calves (distal). Test-retest reproducibility was assessed by recording transcutaneous oximetry measurements twice and expressed as SEM and intra-class correlation coefficients. MDC was calculated using the formula MDC = SEM x 1.96 x √ 2. RESULTS: Twenty eight LEAD patients (61 ± 9 years old) were included. Intra-class correlation coefficients were 0.66 [0.50, 0.79] and 0.65 [0.49, 0.79] for the proximal and distal levels, respectively. The SEM of DROP at the proximal and distal levels were 7 [6, 9] mm Hg and 9 [8, 11] mm Hg, respectively. The SEM for all (proximal and distal) DROP values was 8 [7, 10] mm Hg and the MDC of DROP was 23 mm Hg. CONCLUSIONS: Exercise-TcPO2 with measurement of DROP values has a moderate test-retest reliability in LEAD patients with a maximal walking distance ≤ 300m. For an individual, an improvement or deterioration in DROP of ≥ 23 mm Hg after an intervention would be required to be 95% confident that the change is significant. It should be considered in evaluating the impact of treatment in patients with claudication.
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Dates et versions

hal-04338007 , version 1 (12-12-2023)

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Thérèse Tueguem Moyo, Pierre Jehannin, Estelle Le Pabic, Alexis Le Faucheur, Loukman Omarjee, et al.. Test-retest Reliability and Minimal Detectable Change in Exercise Oximetry in Claudicants. Annals of Vascular Surgery, 2024, Annals of Vascular Surgery, 99, pp.19-25. ⟨10.1016/j.avsg.2023.09.095⟩. ⟨hal-04338007⟩
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