Patent ID: 8172803

Claim:
An apparatus comprising: a cannula insertion device comprising: a frame; a hub mounted to the frame and arranged to be slidably moveable from a first position in a first direction to a second position relative to the frame; and a needle projecting in the first direction from the hub, the needle being shielded by the frame when the hub is in the first position; and a detachable cannula assembly including a cannula, the needle carrying the detachable cannula assembly; the frame and hub arranged to allow the hub to be moved from the first position to the second position so as to insert the cannula into a patient and to be moved in a second, reverse direction backwards to a third position in which the frame shields the needle; the apparatus further comprising: a housing for receiving the detachable cannula assembly, wherein the cannula insertion device is removeably attached to the housing and is detachable from the housing only once the hub is in the third position, wherein the frame includes first and second arms running along opposite sides of a central portion of the frame and attached thereto by respective deformable hinges, each arm having an anterior distal end and a posterior distal end relative to the hinge of the arm, the anterior distal ends of the arms arranged to provide jaws for releasably attaching the cannula insertion device to the housing for receiving the detachable cannula assembly; and wherein the hub has opposing surfaces for gripping between a finger and thumb of one hand and which lie outside the arms of the frame, at least a portion of the hub being deformable so as to allow the opposing surfaces to be moved inwards when pressed together.