Three-min Step Test and Exercise Desaturation Detection in Chronic Respiratory Insufficiency Patients

University Hospital, Limoges27 enrolled

Overview

The study project will aim at the evaluation of the occurrence of exercise desaturation phenomenon during two different modalities of exercise (walking and stepping condition). This study will allow determining the sensibility of the 3-minute step test to detect exercise desaturation, in comparison with the gold standard (6-minute walking test). The 3-minute step test could therefore appear as a complementary tool for the evaluation of oxygen desaturation in chronic respiratory disease.

The 6-minute walking test is currently the gold standard for the evaluation of oxygen desaturation phenomenon during exercise and for the adjustment of O2 flow rate. But, due to spatial constraints, this test remains difficult to apply in ecological conditions and the 3-minute step test could be a complementary method to the walking test for the evaluation of chronic respiratory diseases. For this study, patients will perform, during 2 visits, a maximal graded test and two field tests (6-min walking test and 3-min step test) under identical conditions. During these tests, pulsed oxygen saturation and psycho-physiological adaptations to exercise will be monitored.

Study Type

INTERVENTIONAL

Allocation

Purpose

DIAGNOSTIC

Masking

NONE

Enrollment

Conditions

COPD Chronic Respiratory Disease

Interventions

Three-min Step Test and Exercise desaturation detection in COPDDIAGNOSTIC_TEST

For this research, 2 visits will be scheduled (V1 and V2) for each patient. During V1, after collecting the filled and signed consent form from the patient, anthropometric measurements and pulmonary function assessment will be performed before the realization of a maximal graded test. This inclusion visit will be carried out as part of an inclusion within a respiratory rehabilitation program. During V2, each patient will randomly perform a 6-minute walking test and a 3-minute step test, in similar standard conditions. A 30-minute resting period will be allowed between the two field tests. During the realization of the tests, cardio-respiratory adaptations will be monitored throughout both tests with portable gas analyzer and pulsed oxymetry system.

Eligibility

Sex: ALLMin age: 18 Years

Medical Language ↔ Plain English

Inclusion Criteria: * Patients aged by 18 and more ; * Patient with an chronic obstructive respiratory insufficiency, confirmed by clinical and functional criteria ; * Patient with exercise-induced oxygen desaturation ; * Patient clinical ly stable, with no exacerbation period within the last 2 months before inclusion ; * Consent form signed by the patient. Exclusion Criteria: * Patient in exacerbation period at the inclusion time ; * Pregnant and breastfeeding women ; * Patient with orthopedic disorder that could limit the ability of stair climbing; * Any other disease that could influence exercise capacity of the patient or that could impair exercise test realization ; * Patient with law protection (guardianship or protection of vulnerable adults)

Locations (1)

Chu de Limoges

Limoges, France

Outcomes

Primary Outcomes

Detection of exercise desaturation occurrence

Detection of exercise desaturation occurrence correspond to a fall of SpO2 rest value by at least 4 points during exercise, assessed with the measurement of pulsed oxygen saturation during the different tests.