[Clinical trials with medical devices: lack of quality illustrated for faecal incontinence].

BACKGROUND

Medical devices must be safe and functioning states the law. Treatments with medical devices need not be efficacious to be allowed. We investigated special requirements and problems arising from the law.

METHODS

The market for medical devices is contrasted with that for drugs. The requirements of relevant laws are discussed. Finally, published clinical studies on anal incontinence are analysed with respect to their methodological quality.

RESULTS

Clinical trials of medical devices for treat-ing anal incontinence are of poor methodological quality thus preventing evaluation of the devices' utility.

CONCLUSION

Large, high quality clinical studies of the efficacy of medical devices for treating anal incontinence are urgently needed. Only such studies enable health technology assessment and comprehensible decisions on reimbursement by health insurance.