Portable Oxygen Therapy: Is the 6-Minute Walking Test Overestimating the Actual Oxygen Needs?

  1. Leon-Jimenez, Antonio
  2. Montoro-Ballesteros, Francisca
  3. Priego-Torres, Blanca
  4. Sanchez-Morillo, Daniel
  5. Lara-Doña, Alejandro
  6. Morales-Gonzalez, Maria
  1. 1 Universidad de Cádiz
    info

    Universidad de Cádiz

    Cádiz, España

    ROR https://ror.org/04mxxkb11

  2. 2 Biomedical Engineering and Telemedicine Research Group, Department of Automation Engineering, Electronics and Computer Architecture and Networks, School of Engineering, University of Cadiz, Avda. Universidad de Cádiz 10, Puerto Real, 11519 Cádiz, Spain
  3. 3 Pulmonology, Allergy and Thoracic Surgery Unit, Puerta del Mar University Hospital, Avda. Ana de Viya 21, 11009 Cádiz, Spain
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Journal:
Journal of Clinical Medicine

ISSN: 2077-0383

Year of publication: 2020

Volume: 9

Issue: 12

Pages: 4007

Type: Article

DOI: 10.3390/JCM9124007 GOOGLE SCHOLAR lock_openOpen access editor

More publications in: Journal of Clinical Medicine

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Abstract

The appropriate titration for the personalized oxygen needs of patients with chronic obstructive pulmonary disease (COPD) and severe hypoxemia is a determining factor in the success of long-term oxygen therapy. There are no standardized procedures to assist in determining the patient’s needs during the physical activities of daily life. Despite that effort tests are a wide broad approach, further research concerning the development of protocols to titrate O2 therapy is needed. The main objective of this study was to assess whether the level of oxygen titrated through the 6-minute walking test (6MWT) for patients with COPD and exertional hypoxemia is adequate to meet the patients’ demand during their activities of daily living. Physiological and subjective variables were estimated for a study population during two walking tests: a 6MWT and a 20-minute walking circuit (20MWC), designed ad-hoc to reproduce daily physical activities more truthfully. The results indicate that in a significant proportion of patients, the 6MWT might not accurately predict their oxygen needs at a domiciliary environment. Therefore, the titration of the portable O2 therapy could not be optimal in these cases, with the detrimental impact on the patient’s health (hyperoxia episodes), the autonomy of the oxygen device, and the decrease of time out of the home.

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