Infusion site interfaces and insertion devices for infusion site interfaces

An infusion site interface, the infusion site interface comprising:

• an interface body mounted on a pad that is configured to adhesively attach to a body of a patient;
• a soft infusion cannula configured for insertion into the body of the patient, wherein the infusion cannula is connected to the interface body;
• wherein the interface body defines a cavity fluidly connected to the infusion cannula, wherein the cavity has an opening;
• a septum that seals closed the cavity, wherein the septum has a substantially planar surface that spans across the opening of the cavity to seal the opening of the cavity, wherein the planar surface of the septum is penetrable by an insertion needle in the infusion cannula, in a first angle to a perpendicular of the planar surface of the septum, and wherein the same planar surface of the septum is penetrable by a hollow needle of an infusion tubing connector coupled to the infusion site interface, in a second angle to the perpendicular of the planar surface of the septum, wherein the infusion tubing connector engages a guide in a horizontal direction that is parallel to the plane defined by the pad, wherein the horizontal direction defines the second angle that is different from the first angle;
• and
• the guide is configured to guide the hollow needle of the infusion tubing connector during coupling, parallel to a plane defined by the pad.