Project aims to create artificial sphincter implants

The research initiative Nano-Tera.ch will provide CH2.2m (€1.8m) to support the interdisciplinary research and development of the implant that is being designed for people with incontinence.

Mild cases of incontinence can be treated with medication but in severe cases doctors must attempt to repair the sphincter or implant an artificial one.

The hydraulic sphincter implants that are currently available are said to have major disadvantages. They exert significant and permanent pressure on the tissue, which can lead to damage of the anus. Further, they are often complicated to use, especially for older patients.

Given these problems, researchers led by Prof Bert Müller of the University of Basel’s Biomaterials Science Center, in cooperation with associated partners, are to develop an implant that would contract and relax like a natural muscle.

‘An intelligent sphincter would automatically increase the pressure when the patient coughs,’ said Müller in a statement.

The researchers will rely on 10,000nm thin plastic films that become warped when exposed to a voltage. The technology already exists in principle, but miniaturisation is needed to apply them in battery operated implants that can last for several years.