ArticleBMC pulmonary medicine2024
Oxygen saturation recovery after 6-minute walk test in patients with idiopathic pulmonary fibrosis.
Article in BMC pulmonary medicine, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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5 citing papers in PubMed.
- Clinical Significance of Echocardiographic Parameters in Patients with Pulmonary Hypertension Associated with Interstitial Lung Disease.Journal of cardiovascular development and disease · 2026Article
- Beyond Diffusion Capacity: Continuous Exercise Oximetry Reveals Phenotype-Related Cardiopulmonary Signals in Idiopathic Pulmonary Fibrosis and Progressive Pulmonary Fibrosis-A eurILDreg Pilot Study.Journal of clinical medicine · 2026Article
- The TUG-10 test detects exertional desaturation in patients with interstitial lung disease: correlation with 6-minute-walk-test, cardiopulmonary exercise test, and lung diffusion capacity.European journal of applied physiology · 2026Article
- Prognostic significance of incorporating SpO2 recovery time to the 6-minute walk test protocol and to a modified GAP index risk prediction model in patients with idiopathic pulmonary fibrosis.Sarcoidosis, vasculitis, and diffuse lung diseases : official journal of WASOG · 2026Article
- Efficacy of ginkgo biloba extract in the treatment of idiopathic pulmonary fibrosis: a systematic review and meta-analysis of randomized controlled trials.Frontiers in pharmacology · 2025Review
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Abstract
backgroundThe six-minute walk test (6MWT) is widely used to assess functional capacity and prognosis in patients with idiopathic pulmonary fibrosis (IPF). However, studies on oxygen saturation recovery after the 6MWT in patients with IPF are rare. In our study, we investigated the relationship between oxygen saturation recovery time and dyspnea, fatigue, quality of life, prognostic markers and pulmonary hypertension (PH).
methodsIn this cross-sectional study, IPF patients diagnosed according to current guidelines and followed up in our Interstitial Lung Disease Outpatient Clinic between 2021 and 2022 were included. Demographics, data from spirometry, diffusion capacity measurement, arterial blood gas analysis, transthoracic echocardiography and the 6MWT were recorded. The oxygen saturation recovery time, distance saturation product (DSP), gender-age-physiology (GAP) index and composite physiological index (CPI) scores were calculated. Dyspnea severity was assessed by the modified Medical Research Council (mMRC) and Dyspnoea-12 (D-12) scales, fatigue severity by the Multidimensional Fatigue Inventory (MFI-20) and quality of life by the St George's Respiratory Questionnaire (SGRQ).
resultsFifty IPF patients (34 men, 16 women, age: 66.8 ± 7.3 years) were included in the study. The mean FVC was 77.8 ± 19.3%, the DLCO was 52.9 ± 17.1%, the 6-minute walk distance (6MWD) was 385.7 ± 90.6 m, the GAP index was 3.5 ± 1.5, and the CPI was 43.7 ± 14.1. Oxygen saturation after the 6MWT reached pretest values at an average of 135.6 ± 73.5 s. The oxygen saturation recovery time was longer in patients with higher GAP index scores (Rs = 0.870, p < 0.001), CPI scores (Rs = 0.906, p < 0.001), desaturation (Rs = 0.801, p < 0.001), FVC%/DLCO% (Rs = 0.432, p = 0.002), sPAP (Rs = 0.492, p = 0.001), TRV (Rs = 0.504, p = 0.001), mMRC (Rs = 0.913, p < 0.001), MFI-20 (Rs = 0.944, p < 0.001), D-12 scale (Rs = 0.915, p < 0.001) and SGRQ scores (Rs = 0.927, p < 0.001); lower FVC (%) (Rs=-0.627, p < 0.001), DLCO (%) (Rs=-0.892, p < 0.001), PaO
conclusionsOur results showed that oxygen saturation recovery time is associated with dyspnea, fatigue, quality of life, increased risk of PH and prognostic markers in IPF. Therefore, we recommend continuous measurement of oxygen saturation after 6MWT until pretest values are reached.
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