NEEDLE FOR TRANSCUTANEOUS ANALYTE SENSOR DELIVERY
First Claim
1. A needle for implanting a continuous analyte sensor, comprising:
- a wall structure comprising a proximal end and a distal end, wherein the wall structure comprises a lumen with a cross dimension sized to hold a continuous analyte sensor, wherein the distal end comprises a distal tip, wherein the distal tip comprises at least one first bevel and at least one second bevel.
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Accused Products
Abstract
The present disclosure relates to a needle including a wall structure, a cutting edge and a blunt contour. The needle advantageously can be used to deliver a sensor (such as a glucose or other analyte sensor) through an outer skin layer and into a sensor depth in a less invasive way than prior art needles. The size of the cutting edge is balanced against a portion of the distal wall structure that has blunt contours. Thus, the needle is capable of cutting the more durable outer skin layer (first phase) and then progressively stretching open the cut for further advancement into the subcutaneous layer (second phase). When the needle is sufficiently advanced, it is retracted leaving the sensor in a desired position. Early testing has shown a reduction of “dip and recover” from glucose sensors delivered using the needle.
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Citations
15 Claims
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1. A needle for implanting a continuous analyte sensor, comprising:
a wall structure comprising a proximal end and a distal end, wherein the wall structure comprises a lumen with a cross dimension sized to hold a continuous analyte sensor, wherein the distal end comprises a distal tip, wherein the distal tip comprises at least one first bevel and at least one second bevel. - View Dependent Claims (2, 3)
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4. A needle for implanting a continuous analyte sensor, comprising:
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a wall structure having a central axis, at least one cross dimension and defining at least one inner dimension sized to contain the sensor for delivery; at least one cutting edge on the wall structure configured to pierce the outer skin layer; and at least one blunt contour on the wall structure, the blunt contour configured to bluntly dissect tissue as the wall structure advances into the sensor depth, wherein the blunt contour comprises an area viewed along the central axis within a range of 0.85 times to 2.74 times a an area viewed along the central axis and defined by the cutting edge. - View Dependent Claims (5, 6, 7, 8, 9)
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10. A needle for implanting a continuous analyte sensor, comprising:
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a wall structure having a central axis, at least one cross dimension and defining at least one inner dimension sized to contain the sensor for delivery; at least one cutting edge on the wall structure configured to pierce the outer skin layer; and at least one blunt contour on the wall structure, the blunt contour configured to bluntly dissect tissue as the wall structure advances into the sensor depth, wherein the wall structure defines a proximal slot configured to receive a kink of the sensor therein. - View Dependent Claims (11, 12, 13, 14, 15)
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Specification