An internal drug delivery system that does not have to be recovered when spent Normally, for long-term drug release, you would need to insert a reservoir or device for holding the drug back, and this is usually something non-degradable, that has to be retrieved when the dose is exhausted. But the team thinks with their technique, which uses biodegradable film, you could implant it and it would release the drug for about a year, and you would not have to go in and retrieve it - it would simply biodegrade.

In their paper, the developers describe how the duration of controlled-release is significantly longer with their refined technique than that achieved by most commercially available biodegradable products. To get the technique right, the team had to tackle a difficult problem in localized drug delivery: how to ensure that the process through which the drug is released occurs at the…