Three versus seven day circuit changes of humidified oxygen circuitry: a feasibility study

Webster, Joan, Hall, Laurie, Goodwin, Di, Bligh, Susan, & Coyer, Fiona M. (2008) Three versus seven day circuit changes of humidified oxygen circuitry: a feasibility study. Australian Journal of Advanced Nursing, 25(4), pp. 23-30.


Objective: The study compared the rate of humidifier acquired pneumonia between patients in whom humidifier circuitry is changed every three days with patients in whom circuitry is changed every 7 days in order to assess the feasibility of conducting a large scale randomised controlled trial to test the safety of extending the period between humidified circuit changes from three to seven days. Design: The study was a randomised controlled trial. Setting: The setting for the study was a 942 bed general teaching hospital in Queensland, Australia. Subjects: The subjects of the study were patients receiving humidified oxygen in surgical, medical and infectious diseases units of the hospital. Interventions: Consenting subjects were randomly allocated to either 3-day (control) or 7-day (intervention) circuit changes. Main outcome measures: The primary outcome measure was nosocomial pneumonia and the secondary outcome measures were death and length of humidification therapy. Results: Of the 51 eligible patients, 32 were included in the study (17 patients were randomised to the control group and 15 patients to the intervention group; recruitment rate 63%). During the study, four cases of nosocomial pneumonia occurred; two in the intervention group (13.3%) and two in the control group (11.8%) (χ2 = 0.018, p = 0.894). No patients died during the study period. Conclusion: No high quality evidence exists to assist nurses to make a decision about how frequently to change humidifier circuitry. Potential cost savings involved in extending the time frame between humidifier circuitry changes indicate that a large scale randomised controlled trial is both feasible and important.

Impact and interest:

0 citations in Scopus
Search Google Scholar™

Citation counts are sourced monthly from Scopus and Web of Science® citation databases.

These databases contain citations from different subsets of available publications and different time periods and thus the citation count from each is usually different. Some works are not in either database and no count is displayed. Scopus includes citations from articles published in 1996 onwards, and Web of Science® generally from 1980 onwards.

Citations counts from the Google Scholar™ indexing service can be viewed at the linked Google Scholar™ search.

Full-text downloads:

225 since deposited on 22 Sep 2008
10 in the past twelve months

Full-text downloads displays the total number of times this work’s files (e.g., a PDF) have been downloaded from QUT ePrints as well as the number of downloads in the previous 365 days. The count includes downloads for all files if a work has more than one.

ID Code: 14914
Item Type: Journal Article
Refereed: No
Additional URLs:
ISSN: 1447-4328
Subjects: Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > NURSING (111000)
Divisions: Current > QUT Faculties and Divisions > Faculty of Health
Copyright Owner: Copyright 2008 Australian Nursing Federation
Copyright Statement: Reproduced in accordance with the copyright policy of the publisher.
Deposited On: 22 Sep 2008 00:00
Last Modified: 29 Feb 2012 13:45

Export: EndNote | Dublin Core | BibTeX

Repository Staff Only: item control page