Burge, Angela T.
Lee, Annemarie L.
Holland, Anne E.
|Type||Journal Article (Original Research)|
|Journal||Archives of Physical Medicine|
|Year of Publication||2018|
|Abstract||To examine the occurrence of adverse events in patients undergoing assessment for pulmonary rehabilitation when a 6-minute walk test (6MWT) continues despite desaturation below 80%. Objective: To examine the occurrence of adverse events in patients undergoing assessment for pulmonary rehabilitation when a 6-minute walk test (6MWT) continues despite desaturation below 80%. Design: Retrospective audit following REporting of studies Conducted using Observational Routinely-collected health Data (RECORD) Statement. Setting: Large teaching hospital. Participants: All patients assessed for pulmonary rehabilitation (September 2005 to January 2016). Interventions: The standardized tests were conducted by experienced cardiorespiratory physiotherapists. Oxyhemoglobin saturation was monitored continuously using a pulse oximeter (lowest value used for analysis). Medical records were reviewed, and adverse events defined as tachycardia, bradycardia, chest pain or other sign/symptom necessitating cessation. Main outcome measure: 6MWT. Results: Data from 672 walk tests were included (55% men, mean age 69 (standard deviation 11) years) with mean distance 369 (124) meters. The main diagnoses were chronic obstructive pulmonary disease (70%), interstitial lung disease (14%) and bronchiectasis (8%). Sixty individuals (11%) recorded desaturation below 80% without adverse events. Two adverse events were recorded during tests without desaturation; in one instance, chest pain with no evidence of cardiorespiratory compromise and in another, the patient stopped due to concern regarding blood sugar levels (11.5 mmol/L when tested). Independent predictors of desaturation to less than 80% were resting oxyhemoglobin saturation < 95% (odds ratio 3.82, 95% confidence interval 2.06 to 7.08) and a diagnosis of interstitial lung disease or pulmonary arterial hypertension (OR 5.24, 2.59 to 10.58). Conclusions: This study found that desaturation to less than 80% during a 6MWT was not associated with adverse events in a large cohort of patients referred to pulmonary rehabilitation and assessed by experienced physiotherapists, suggesting that test cessation due to desaturation in stable patients may be unwarranted.|
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