Coated subcutaneous device and inserter system

An inserter device for automatic insertion and automatic retraction of an insertion needle for subcutaneously inserting a cannula, the inserter device comprising:

• a medical device comprising
• a port site including a cavity with an antimicrobial coating positioned on the cavity, and
• a subcutaneous part including the cannula and a body part having a ribbed portion with the antimicrobial coating positioned on the ribbed portion, the body part being securable to the port site upon activation of the inserter device, wherein the ribbed portion is configured to maintain the body part within the cavity;
• an outer part including release elements and a locking element, wherein pressing the release elements together activates the inserter device;
• a housing partly covered by the outer part;
• and
• a functional part located within the housing, the functional part including a first part, a second part having the insertion needle attached to the second part, an insertion spring, and a retraction spring,
• wherein the locking element provides a pre-loaded shelf position of the inserter device wherein the body part is not located in the cavity of the port site in the pre-loaded shelf position before the activation of the inserter device, and following the activation of the inserter device, the cannula is inserted in a patient's skin and the body part is located in the cavity of the port site.