Transcutaneous sensor insertion set
First Claim
1. A transcutaneous sensor insertion set, comprising:
- a mounting base adapted for mounting onto a patient'"'"'s skin;
a flexible sensor having a proximal segment carried by said mounting base, and a distal segment protruding from said mounting base and having at least one sensor electrode thereon;
a hollow cannula having a window formed therein;
cooperative mount means on said mounting base and said cannula for supporting said cannula from said mounting base to protrude therefrom with said sensor distal segment received therein and with said cannula in a predetermined orientation relative to said mounting base for positioning said window formed in said cannula generally in alignment with said at least one sensor electrode; and
an insertion needle carried by said mounting base to protrude therefrom through said cannula whereby said sensor distal segment is interposed and supported between said needle and an interior wall surface of said cannula, said insertion needle being slidably withdrawable from said mounting base and said cannula to leave said sensor distal segment within said cannula.
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Accused Products
Abstract
An improved insertion set is provided for transcutaneous placement of a sensor such as a glucose sensor at a selected site within the body of a patient. The insertion set comprises an insertion needle extending through a mounting base adapted for mounting onto the patient'"'"'s skin. A flexible thin film sensor includes a proximal segment carried by the mounting base and adapted for electrical connection to a suitable monitor or the like, and a distal segment protruding from the mounting base with sensor electrodes thereon for transcutaneous placement. The distal segment of the sensor and a distal segment of the insertion needle are positioned within a flexible cannula which extends from the mounting base, whereby placement of the mounting base onto the patient'"'"'s skin causes the insertion needle to pierce the skin for transcutaneous placement of the cannula with the sensor therein. The insertion needle can then be withdrawn from the cannula and the mounting base to leave the sensor distal segment at the selected insertion position, with the sensor electrodes being exposed to patient blood or other extracellular fluid via a window formed in the cannula. The cannula is carried by the mounting base to insure alignment of the sensor electrodes with the cannula window.
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Citations
18 Claims
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1. A transcutaneous sensor insertion set, comprising:
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a mounting base adapted for mounting onto a patient'"'"'s skin; a flexible sensor having a proximal segment carried by said mounting base, and a distal segment protruding from said mounting base and having at least one sensor electrode thereon; a hollow cannula having a window formed therein; cooperative mount means on said mounting base and said cannula for supporting said cannula from said mounting base to protrude therefrom with said sensor distal segment received therein and with said cannula in a predetermined orientation relative to said mounting base for positioning said window formed in said cannula generally in alignment with said at least one sensor electrode; and an insertion needle carried by said mounting base to protrude therefrom through said cannula whereby said sensor distal segment is interposed and supported between said needle and an interior wall surface of said cannula, said insertion needle being slidably withdrawable from said mounting base and said cannula to leave said sensor distal segment within said cannula. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A transcutaneous sensor insertion set, comprising:
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a mounting base adapted for placement onto a patient'"'"'s skin and having an open part formed therein; a flexible sensor having a proximal segment carried by said mounting base, a distal segment protruding downwardly from said mounting base and having a tip end with at least one sensor electrode thereon; a hollow cannula having one end supported by said mounting base and protruding therefrom with said sensor distal segment therein; cooperative mount means on said cannula and said mounting base for orienting said cannula in a predetermined orientation relative to said mounting base, said cannula having at least one window formed therein for exposing said sensor electrode to patient body fluid; and an insertion needle slidably receivable through an open port formed in said mounting base to extend through said cannula whereby said sensor distal segment is supported between said needle and an interior wall surface of said cannula; said insertion needle being positioned to pierce a patient'"'"'s skin to carry said cannula and said sensor distal segment therein to an insertion position within the patient upon placement of said mounting base onto the patient'"'"'s skin, said insertion needle being slidably withdrawable from the patient'"'"'s skin and said mounting base to leave said cannula with said sensor distal segment therein at the insertion position. - View Dependent Claims (15, 16, 17, 18)
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Specification