P89 Ambulatory oxygen assessments in COPD and pulmonary fibrosis

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Abstract

Background

Between 2006 and 2011, 161 patients were referred for formal ambulatory oxygen assessment at the Newcastle RVI. Their results have been reviewed.

Method

The assessments comprised three 6-min walk tests (6MWT) supervised by a trained healthcare professional as per BTS guidelines (2006).

Method

Minimum SpO2 during exercise, distance walked and oxygen flow rate required to maintain SpO2 above 90% were recorded together with the respiratory diagnosis and basic demographic details.

Results

18 patients were excluded as they did not de saturate on walk 1 or were unable to complete the 6MWT. 143 patients' results were analysed. 82 were male with 61 female. The two commonest clinical diagnoses were Interstitial Pulmonary Fibrosis (IPF) and COPD.

Results

IPF patients walked on average 70 m (31%) further than COPD patients on room air. They had the greatest increase in oxygen saturation when exercising on supplemental oxygen (12%) but had the lowest improvement in walking distance (7.3%). There was no relationship between improvement in walk test distance and improvement in oxygenation in any of the subgroups.

Conclusion

Further studies may be needed to explore the relative benefits of ambulatory oxygen in non-COPD patients.

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