Combined infusion set and sensor

Abstract

In one embodiment, an infusion set and sensor assembly delivered within a subject is disclosed. The assembly includes a cannula that is terminated at a cannula opening. The assembly further includes a sharp that is at least partially within the hollow of the cannula. A sensor having a proximal end and a distal end is also included in the assembly. The proximal end of the sensor is held in a fixed location while the distal end is retained with a portion of the cannula. The sensor further includes sensor slack, wherein transitioning the sharp from a first position to a second position simultaneously inserts the cannula and sensor to a desired insertion depth within a subject via a single point of insertion.

1 . An infusion set and sensor assembly to be delivered within a subject, comprising:
 a cannula being terminated at a cannula opening, the cannula being hollow;   a sharp being at least partially within the hollow of the cannula;   a sensor having a proximal end and a distal end, the proximal end being held in a fixed location, the distal end being retained with a portion of the cannula, the sensor further having sensor slack;   wherein transitioning the sharp from a first position to a second position simultaneously inserts the cannula and sensor to a desired insertion depth within a subject via a single point of insertion.   
     
     
         2 . The infusion set and sensor assembly of  claim 1 , wherein the sensor slack is defined as an amount of the sensor doubling back upon itself. 
     
     
         3 . The infusion set and sensor assembly of  claim 2 , wherein when in the first position, the cannula, the sharp, the sensor and the sensor slack are contained within a housing. 
     
     
         4 . The infusion set and sensor assembly of  claim 2 , wherein the proximal end of the sensor is affixed to a circuit board within the housing. 
     
     
         5 . The infusion set and sensor assembly of  claim 2 , wherein during the transition between the first position and the second position, there is a change in the amount of sensor slack. 
     
     
         6 . The infusion set and sensor assembly of  claim 5 , wherein the change of sensor slack places the sensor within the channel and reinforces the cannula to prevent bending or kinking of the cannula. 
     
     
         7 . The infusion set and sensor assembly of  claim 5 , wherein change of the sensor slack defines the insertion depth of the cannula and sensor. 
     
     
         8 . The infusion set and sensor assembly of  claim 5 , wherein insertion depth of the sharp defines the insertion depth of the cannula and sensor. 
     
     
         9 . The infusion set and sensor assembly  claim 5 , wherein change of the sensor slack partially defines the insertion depth of the cannula and sensor. 
     
     
         10 . The infusion set and sensor assembly of  claim 4 , wherein a moisture impermeable seal is applied to affix the proximal end of the sensor to the circuit board. 
     
     
         11 . A combined infusion set and sensor for placement within tissue, comprising:
 a housing having a base plate that includes a base opening;   a circuit board having a board opening, the board opening being partially aligned with the base opening;   a cannula being terminated at a cannula opening, the cannula further having a hollow;   a sharp being at least partially within the hollow; and   a sensor having a proximal end and distal end, the proximal end being in electrical contact with the circuit board and a distal end being retained by a portion of the cannula, the sensor further including sensor slack,   wherein the cannula, the sharp and the sensor transition from a first position to a second position, during the transition the sharp protruding through the cannula opening and the transition to the second position eliminating the sensor slack, the second position having the cannula and sensor placed within the tissue via a single point of insertion.   
     
     
         12 . The combined infusion set and sensor of  claim 11 , wherein the sharp further transition to a third position, the third position having the sharp withdrawn from the tissue. 
     
     
         13 . The combined infusion set and sensor of  claim 11 , wherein the sensor slack defines insertion depth of the cannula. 
     
     
         14 . The combined infusion set and sensor of  claim 11 , wherein during the transition between the first position and the second position, the sensor slack is unfurled against the cannula to reinforce the cannula and minimize buckling or kinking of the cannula. 
     
     
         15 . The combined infusion set and sensor of  claim 11 , wherein during the transition between the first position and the second position the sensor slack is unfurled into a channel on the cannula. 
     
     
         16 . The combined infusion set and sensor of  claim 11 , wherein the sensor slack is contained within the housing. 
     
     
         17 . The combined infusion set and sensor of  claim 11 , wherein the sensor comprises a first element and a second element, each of the first element and the second element having their own discrete proximal end and distal end. 
     
     
         18 . The combined infusion set and sensor of  claim 17 , wherein the first element includes a working electrode and pseudoreference electrode. 
     
     
         19 . The combined infusion set and sensor of  claim 18 , wherein the second element includes a working electrode and a pseudoreference electrode. 
     
     
         20 . The combined infusion set and sensor of  claim 17 , wherein the first element has a working electrode and the second element has a pseudoreference electrode.