Abstract
This study was performed to assess the survival times of the Provox valve in the Manchester area. Thirty-nine patients from four hospitals, representing 81 valve failures, were studied. The effects of the timing of the tracheo-oesophageal puncture, previous radiotherapy, and the presence and timing of cricopharyngeal myotomy on valve life were analysed. Regression analysis using an extension of the Cox model to allow strata showed that the lifetime of the first valve only is adversely affected by previous radiotherapy. The other covariates do not have a statistically significant effect on valve survival. The median valve survival is 4.5 months, (range one to 12 months). A small percentage of valve users with particularly frequent valve failures may require additional support and prolonged anti-fungal therapy.Citation
Survival times of Provox valves. 1996, 110 (1):37-42 J Laryngol OtolJournal
The Journal of Laryngology and OtologyDOI
10.1017/S0022215100132670PubMed ID
8745779Type
ArticleLanguage
enISSN
0022-2151ae974a485f413a2113503eed53cd6c53
10.1017/S0022215100132670
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