Injector device for placing a subcutaneous infusion set
First Claim
Patent Images
1. An injector device for transcutaneously placing a hollow cannula of a subcutaneous infusion set through the skin of a patient, comprising:
- a device housing having an elongated bore formed therein;
a plunger slidably received within the bore movement between an advanced position and a retracted position, the plunger having an insertion needle substantially non-detachably secured thereto by a connection such that the insertion needle remains connected to the plunger is in the retracted position and the advanced position, said insertion needle for receiving and supporting the cannula of said subcutaneous infusion set in a position with the cannula oriented for transcutaneous placement upon movement of the plunger with said needle from the retracted position to the advanced position, a drive for urging the plunger with a controlled force and speed from the retracted position toward the advanced position to transcutaneous place said cannula of said subcutaneous infusion set received on said insertion needle, wherein said cannula is removable from the insertion needle secured to said plunger while maintaining the transucutaneous placement of the cannula.
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Abstract
An injector device has a plunger with a medical needle essentially non-detachably secured thereto, preferably a solid needle incapable of delivering a fluid, and is adapted for the quick and easy transcutaneous placement through the skin of a patient of the cannula of a subcutaneous infusion set, the insertion needle extending through the infusion set and protruding from the end of the cannula.
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Citations
43 Claims
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1. An injector device for transcutaneously placing a hollow cannula of a subcutaneous infusion set through the skin of a patient, comprising:
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a device housing having an elongated bore formed therein;
a plunger slidably received within the bore movement between an advanced position and a retracted position, the plunger having an insertion needle substantially non-detachably secured thereto by a connection such that the insertion needle remains connected to the plunger is in the retracted position and the advanced position, said insertion needle for receiving and supporting the cannula of said subcutaneous infusion set in a position with the cannula oriented for transcutaneous placement upon movement of the plunger with said needle from the retracted position to the advanced position, a drive for urging the plunger with a controlled force and speed from the retracted position toward the advanced position to transcutaneous place said cannula of said subcutaneous infusion set received on said insertion needle, wherein said cannula is removable from the insertion needle secured to said plunger while maintaining the transucutaneous placement of the cannula. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An injector device for transcutaneously placing a hollow cannula of a subcutaneous infusion set through the skin of a patient, comprising:
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a device housing having an elongated bore formed therein, a plunger slidably received within the bore for movement between an advanced position and a retracted position, the plunger having substantially non-detachably secured thereto an insertion needle for receiving and supporting the cannula of said subcutaneous infusion set in a position with the cannula oriented for transcutaneous placement upon movement of the plunger with said needle from the retracted position to the advanced position, and a drive comprising a spring for urging the plunger with a controlled force and speed from the retracted position toward the advanced position to transcutaneously place said cannula of said subcutaneous infusion set received on said insertion needle, wherein the spring comprises a number of individual, elongated flexible plastic strips extending around a respective part of the periphery of the plunger, in a annular space between the plunger and the device housing, each strip being connected with the plunger and with the device housing; and
wherein the insertion needle secured to said plunger is removable from said cannula while maintaining the transcutaneous placement of the cannula. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. An injector device assembly, comprising:
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an infusion set including a housing and a hollow cannula a device housing having an elongated bore formed therein, a plunger slidably received within the bore for movement between an advanced position and a retracted position, the plunger having an insertion needle substantially non-detachably secured thereto by a connection such that the insertion needle remains connected to the plunger when the plunger is in the retracted position and the advanced position, said insertion needle carrying said cannula with the cannula oriented for transcutaneous placement upon movement of said plunger from the retracted position to the advanced position, a spring for urging said plunger toward the advanced position, and a trigger for releasably retaining the plunger in the retracted position, the trigger being operable to release the plunger for spring-loaded movement with a controlled force and speed toward the advanced position, wherein said cannula is removable from the insertion needle secured to said plunger while maintaining the transcutaneous placement of the cannula. - View Dependent Claims (27, 28, 29, 32)
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30. An injector device, comprising:
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a molded device housing hiving an elongated bore formed therein, a molded plunger slidably received within the bore for movement between an advanced position and a retracted position, a drive for urging the plunger with a controlled force and speed from the retracted position toward the advanced position, wherein the drive comprises a number of individual, elongated flexible plastics members, each member being connected with the plunger and with the device housing. - View Dependent Claims (31, 33, 34, 35, 36)
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37. An injector device assembly, comprising:
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an infusion set including a housing and a hollow cannula, a device housing having an elongated bore formed therein, a plunger slidably received within the bore for movement between an advanced position and a retracted position, the plunger having substantially non-detachably secured thereto an insertion needle carrying said cannula with the cannula oriented for transcutaneous placement upon movement of said plunger from retracted position to the advanced position;
a spring for urging said plunger toward the advanced position, the spring comprising a number of individual, elongated flexible plastics strips extending around a respective part of the periphery of the plunger, in an annular space between the plunger and the device housing, each strip being connected with the plunger and with the device housing; and
a trigger for releasably retaining the plunger in the retracted position, the trigger being operable to release the plunger for spring-loaded movement with a controlled force and speed toward the advanced position, wherein the insertion needle secured to said plunger is removable from said cannula while maintaining the transcutaneous placement of the cannula. - View Dependent Claims (38, 39, 40, 41)
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42. An injector device for transcutaneously placing a hollow cannula of a subcutaneous infusion set through the skin of a patient, comprising:
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a device housing having an elongated bore formed therein;
a plunger slidably received within the bore for movement between an advanced position and a retracted position, the plunger having substantially non-detachably secured thereto an insertion needle for receiving and supporting the cannula of said subcutaneous infusion set in a position with the cannula oriented for transcutaneous placement upon movement of the plunger with said needle from the retracted position to the advanced position, a drive for urging the plunger with a controlled force and speed from the retracted position toward the advanced position to transcutaneously place said cannula of said subcutaneous infusion set received on said insertion needle, wherein amid insertion needle is substantially non-detachably secured to said plunger in said retracted position and said advanced position; and
wherein said cannula is removable from said insertion needle while maintaining the transcutaneous placement of the cannula.
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43. An injector device assembly, comprising:
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an infusion set including a housing and a hollow cannula;
a device housing having an elongated bore formed therein;
a plunger slideably received within the bore for movement between an advanced position and a retracted position, the plunger having substantially non-detachably secured thereto an insertion needle carrying said cannula with the cannula oriented for transcutaneous placement upon movement of said plunger from the retracted position to the advanced position;
a spring for urging said plunger toward the advanced position; and
a trigger for releasably retaining the plunger in the retracted position, the trigger being operable to release the plunger for spring-loaded movement with a controlled force and speed toward the advanced position;
wherein said insertion needle is substantially non-detachably secured to said plunger in said retracted position and said advanced position; and
wherein said cannula is removable from said insertion needle while maintaining the transcutaneous placement of the cannula.
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Specification