Larval therapy for leg ulcers (VenUS II): randomised controlled trial

Dumville, Jo C., Worthy, Gill, Bland, J. Martin, Cullum, Nicky, Dowson, Christopher, Iglesias, Cynthia, Mitchell, Joanne L., Nelson, E. Andrea, Soares, Marta O. and Torgerson, David J. (2009) Larval therapy for leg ulcers (VenUS II): randomised controlled trial. BMJ, 338 . doi:10.1136/bmj.b773

Author Dumville, Jo C.
Worthy, Gill
Bland, J. Martin
Cullum, Nicky
Dowson, Christopher
Iglesias, Cynthia
Mitchell, Joanne L.
Nelson, E. Andrea
Soares, Marta O.
Torgerson, David J.
Title Larval therapy for leg ulcers (VenUS II): randomised controlled trial
Journal name BMJ
ISSN 0959-535X
Publication date 2009-03-20
Sub-type Article (original research)
DOI 10.1136/bmj.b773
Open Access Status DOI
Volume 338
Total pages 7
Place of publication London, United Kingdom
Publisher BMJ Group
Language eng
Formatted abstract
Objective To compare the clinical effectiveness of larval therapy with a standard debridement technique (hydrogel) for sloughy or necrotic leg ulcers.
Design Pragmatic, three armed randomised controlled trial.
Setting Community nurse led services, hospital wards, and hospital outpatient leg ulcer clinics in urban and rural settings, United Kingdom.
Participants 267 patients with at least one venous or mixed venous and arterial ulcer with at least 25% coverage of slough or necrotic tissue, and an ankle brachial pressure index of 0.6 or more.
Interventions Loose larvae, bagged larvae, and hydrogel.
Main outcome measures The primary outcome was time to healing of the largest eligible ulcer. Secondary outcomes were time to debridement, health related quality of life (SF-12), bacterial load, presence of meticillin resistant Staphylococcus aureus, adverse events, and ulcer related pain (visual analogue scale, from 0 mm for no pain to 150 mm for worst pain imaginable).
Results Time to healing was not significantly different between the loose or bagged larvae group and the hydrogel group (hazard ratio for healing using larvae v hydrogel 1.13, 95% confidence interval 0.76 to 1.68; P=0.54). Larval therapy significantly reduced the time to debridement (2.31, 1.65 to 3.2; P<0.001). Health related quality of life and change in bacterial load over time were not significantly different between the groups. 6.7% of participants had MRSA at baseline. No difference was found between larval therapy and hydrogel in their ability to eradicate MRSA by the end of the debridement phase (75% (9/12) v 50% (3/6); P=0.34), although this comparison was underpowered. Mean ulcer related pain scores were higher in either larvae group compared with hydrogel (mean difference in pain score: loose larvae v hydrogel 46.74 (95% confidence interval 32.44 to 61.04), P<0.001; bagged larvae v hydrogel 38.58 (23.46 to 53.70), P<0.001).
Conclusions Larval therapy did not improve the rate of healing of sloughy or necrotic leg ulcers or reduce bacterial load compared with hydrogel but did significantly reduce the time to debridement and increase ulcer pain.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ
Additional Notes Article # b773

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Nursing, Midwifery and Social Work Publications
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 80 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 96 times in Scopus Article | Citations
Google Scholar Search Google Scholar
Created: Wed, 21 May 2014, 19:52:39 EST by Vicki Percival on behalf of School of Nursing, Midwifery and Social Work