[Mechanical ileus caused by a Provox voice prosthesis -- an "iatrogenic" enteral complication in voice prosthesis rehabilitation of laryngectomees]

[Solving problems after rehabilitation with voice prostheses : Two rare cases of fistula-related complications]

During the past three decades, the use of voice prostheses has developed worldwide into the gold standard for voice rehabilitation after total laryngectomy. Insertion of a voice prosthesis is a simple and rapid surgical procedure, which is associated with a low rate of complications. The current article describes the cases of 2 patients showing a rapid development of granulation tissue around the voice fistula, leading to complete incarceration of the prosthesis and subtotal/total stenosis of the neopharynx.

The development and treatment of periprosthetic leakage after prosthetic voice restoration. A literature review and personal experience part I: the development of periprosthetic leakage

In the past 30 years, the use of a voice prosthesis has become the treatment of choice for the restoration of speech following laryngectomy. Not only is the placement of a voice prosthesis a simple surgical procedure, but it is also associated with a low rate of complications and an excellent success rate. Approximately, 20-30 % of all patients with voice prostheses, however, develop periprosthetic leakage with aspiration over time. Periprosthetic leakage is usually caused by an enlargement of the tracheo-oesophageal fistula and substantially affects the quality of life of the patients concerned. In a retrospective analysis of our patients, the incidence of periprosthetic leakage was 35.7 % in a total of 232 patients who underwent laryngectomy during a period of 20 years. Substantial enlargement of the tracheo-oesophageal fistula which required multiple treatments occurred in 12.5 % of the patients. In this review, the various causes of fistula enlargement are discussed on the basis of the literature and the experience that we have accumulated during the past 20 years in the management of patients with voice prostheses.

Surgical complications of tracheo-oesophageal puncture and speech valves

PURPOSE OF REVIEW

Speech rehabilitation following total laryngectomy is central to future quality of life. Although other options exist, surgical voice restoration has emerged as the 'gold standard' management strategy in the majority of laryngectomees. Taking this into account, what are the complications of this technique and how should they be successfully managed? The purpose of this review is to provide a comprehensive review of the subject, with particular reference to technique, complications and outcome.

RECENT FINDINGS

As with any surgical intervention, complications may occur in the early postoperative period or later. The article provides a detailed explanation of the varying problems detailed in individual reports, and in case series. Primary or secondary tracheo-oesophageal puncture is also discussed, along with complications resulting from the speech valve itself.

SUMMARY

The positive impact of surgical voice restoration on quality of life in the alaryngeal patient considerably outweighs the complications commonly associated with the procedure. Greater knowledge of the potential problems should continue to reduce the complication rate. Primary puncture, in a patient selected and subsequently managed in a multidisciplinary environment, would appear to provide the best outcome for the patient.

Difficulties in the fixation of prostheses for voice rehabilitation after laryngectomy

In most patients with advanced or recurrent laryngeal or hypopharyngeal cancer, total laryngectomy is indicated. This means the loss of three main functions: phonation; respiration; and the prevention of aspiration during deglutition. Laryngectomy patients have various options to restore phonation: an oesophageal voice; an electrolaryngeal voice; or a tracheo-oesophageal voice. In the last case a silicone rubber shunt valve is placed in the tracheo-oesophageal wall and phonation is generated when exhaled air is forced through the oesophagus and neopharynx. This method is widely applied in Western Europe. In this paper we review the literature on fixation problems with shunt valves, tracheostoma valves and heat and moisture exchange (HME) filters. Tracheo-oesophageal speech without a valve is not considered. Despite 22 years of experience with the implantation of tracheo-esophageal shunt valves and many improvements in the design, problems still remain, such as biofilm formation with subsequent leakage through the valve, the need for frequent and inconvenient replacements, fistula enlargement leading to leakage around the device and reduced fixation, and infections. The high cost of shunt valves is a drawback to their use worldwide. To enable hands-free speech, different types of tracheostoma valve have been developed. These valves are fixed to the skin or to the tracheostoma by means of an intra-tracheal device. An HME filter is used to protect the airway and maintain physiological balance. Such devices are only suitable for a selected group of patients as fixation to the skin or trachea can be a major problem. Speaking and coughing cause pressure increases, which often result in mucous leakage and disconnection of the valve and/or HME filter. Recommendations are made for future improvements in fixation techniques.

�sophagusperforation mit Mediastinalabszess

INTRODUCTION

Surgical voice rehabilitation after total laryngectomy is still only a partially solved problem. Because of easy handling and rare complications, the Provox voice prosthesis has become common in voice rehabilitation.

CASE REPORT

The 69 year old patient underwent laryngectomy, selective bilateral neck dissection and the implantation of a Provox voice prosthesis because of a glottic squamous cell carcinoma (pT(4), pN(0), M(0)). Postoperative healing ensued without any complications. During adjuvant radiochemotherapy, the patient developed distinctive cervical edema which led to a tilting of the Provox prosthesis. Due to a perforation of the posterior esophageal wall, the patient developed a pronounced mediastinal abscess which was relieved through a transcervical mediastinotomy. Antibiotic therapy led to a partial remission of the symptoms.

CONCLUSION

Severe complications may not only occur during the early phase of surgical voice rehabilitation, but also at a much later stage, after completion of the healing process. A voice prosthesis which is too long or generates pressure from a radiogenic edema, cannula and finger pressure used to close the tracheostoma is transmitted through the prosthesis and may lead to a perforation of the posterior esophageal wall. In particular, when the tissue is injured during the course of radiotherapy, this type of complication should be taken into consideration.