A new heat and moisture exchanger with speech valve (Provox stomafilter)

In previous studies investigating the influence of a heat and moisture exchanger on the respiratory and psychosocial problems of laryngectomized patients, the value of regular use of such a device could clearly be established. However, the compliance with the use of these devices was not optimal, mainly due to problems related to the plaster and to the often troublesome combination of these HMEs with a voice prosthesis. Therefore, a prospective, clinical trial was undertaken to investigate whether the use of a newly developed heat and moisture exchanger (HME, Provox stomafilter) could improve the acceptibility of such a device. In total, 19 patients participated in this study, 13 men and six women. Vocal rehabilitation was achieved with a Provox voice prosthesis in all patients. Each of the patients was provided with a supply of HMEs for a 3-week trial period. The results showed that all patients were clearly positive about the valve used for digital occlusion of the stoma. Voicing was considerably facilitated and the intelligibility improved. Problems experienced in previous studies related to the adhesive tape, such as skin irritation, inadequate adherence and loosening of the plaster by coughing or forced expectoration, could be solved by the availability of the different adhesives included in this system.