A clinical comparison of the six minute walk test to a six minute step test protocol for prescribing ambulatory oxygen

Donna Keatley, Mark Jurisevic, Z Kopsaftis, Peter Micalos, Sokcheon Pak, X Lui, P Kidd, R Morena

Research output: Other contribution to conferenceAbstractpeer-review

Abstract

Introduction/Aim. Patients with chronic diseases are often breathless after walking short distances. Such patients sometimes benefit from supplemental oxygen while walking/carrying out low intensity daily activities ie. on exertion. A prescription for oxygen on exertion requires clinical assessment and physician approval. Exertional Oxygen prescriptions are commonly assessed in the clinical setting using adapted versions of the Six Minute Walk Test (6MWT) protocol. End variables (SpO2 desaturation and distance (meters) covered) can be affected by patient stability and varying test design. The Step Test O2 Assessment (ST) replicates the 6MWT protocol time, exercise intensity, and end variables but provides patient stability, better scientific test design (placebo and training effect), and improved equipment safety, all within a 2m2 area (rather than 30 m walking track). The proposed study aims to prove the tests are comparable for end variables leading to appropriate Exertional Oxygen prescriptions.

Method. Patients referred to TQEH Pulmonary Function department for ambulatory oxygen assessment were recruited, as per CSU and CALHN ethics approvals (HREC 19/CALHN181). Patients carried out the 6MWT (ATS 2002 protocol) with and without oxygen and the 6MST with placebo (medical air) and oxygen, on separate days. Steps, distance, saturations, % drop in SpO2, dyspnoea and leg fatigue RPE, BODE index and patients preferences were recorded and compared.

Results. Preliminary data (n = 14) indicates similar %change in SpO2 for the 6MWT and for 6MST between placebo and oxygen test results, and that patient test preferences are equally shared between the 6MWT and 6MST. (Further analysis will be conducted and completed by February 2020, as part of this dissertation study).

Conclusion. Preliminary results indicate comparable results for the 6MWT and 6MST as clinical tools for assessing exertional desaturation for oxygen prescription.

Further analysis will compare protocol end points and point of desaturation during exercise in the 6MWT and 6MST.
Original languageEnglish
Pages15
Number of pages1
Publication statusPublished - 08 Jun 2020
EventThe Australian and New Zealand Society of Respiratory Science and The Thoracic Society of Australia and New Zealand (ANZSRS/TSANZ) Annual Scientific Meeting for Leaders in Lung Health and Respiratory Science 2020: TSANZSRS 2020 - Melbourne Convention and Exhibition Centre, Melbourne, Australia
Duration: 27 Mar 202031 Mar 2020
https://www.tsanzsrs2021.com/
https://onlinelibrary.wiley.com/toc/14401843/2020/25/S1 (conference proceedings)

Conference

ConferenceThe Australian and New Zealand Society of Respiratory Science and The Thoracic Society of Australia and New Zealand (ANZSRS/TSANZ) Annual Scientific Meeting for Leaders in Lung Health and Respiratory Science 2020
CountryAustralia
CityMelbourne
Period27/03/2031/03/20
Internet address

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