Hill, Steadman & Simpson
Implantable medical device with a protected medication layer
 An implantable medical device has surfaces that are in communication with the tissue of the patient after an implantation. At least one part of these surfaces is provided with at least one layer composed of a medication. In order to simply and reliably control the administration of a desired quantity of the medication, the medication layer is covered by at least one layer composed of an ion exchanger material. 
Siemens Aktiengesellschaft
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Ulf Brigitte Lars-Olof
Lindegren Stroetmann Peterson