Transcutaneous device assembly
First Claim
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1. An assembly for insertion of a cannula, comprising:
- a housing,a needle comprising a distal portion adapted to be inserted through the skin of a subject,a needle holder for moving the needle,a flexible cannula comprising a distal portion adapted to be arranged subcutaneously in the subject, the distal portion of the cannula being arranged in sliding parallel relationship with the distal portion of the needle,a cannula holder for moving the cannula relative to the needle,the assembly having an initial state in which the needle holder and the cannula holder are each arranged in a respective first retracted position relative to the housing, and the needle and cannula are each arranged in a respective initial retracted position relative to the housing,an actuator that moves each of the needle holder and the cannula holder to a respective first extended position relative to the housing, and moves each of the needle and the cannula to a respective extended position relative to the housing,an actuator that moves the needle holder to a second retracted position relative to the housing, retracts the needle relative to the housing, simultaneously moving the cannula holder relative to the needle holder and relative to the housing to a second extended position, and extends the cannula relative to the needle.
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Abstract
A medical device is provided comprising a cannula having a distal portion adapted to be arranged through the skin of the subject, and an outer needle arranged coaxially with and being axially moveable relative to the cannula, the needle comprising a pointed distal end, wherein the device is adapted for advancing the cannula with the distal end of the needle projecting there from through the dermis of the subject, and subsequently retract the needle.
254 Citations
16 Claims
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1. An assembly for insertion of a cannula, comprising:
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a housing, a needle comprising a distal portion adapted to be inserted through the skin of a subject, a needle holder for moving the needle, a flexible cannula comprising a distal portion adapted to be arranged subcutaneously in the subject, the distal portion of the cannula being arranged in sliding parallel relationship with the distal portion of the needle, a cannula holder for moving the cannula relative to the needle, the assembly having an initial state in which the needle holder and the cannula holder are each arranged in a respective first retracted position relative to the housing, and the needle and cannula are each arranged in a respective initial retracted position relative to the housing, an actuator that moves each of the needle holder and the cannula holder to a respective first extended position relative to the housing, and moves each of the needle and the cannula to a respective extended position relative to the housing, an actuator that moves the needle holder to a second retracted position relative to the housing, retracts the needle relative to the housing, simultaneously moving the cannula holder relative to the needle holder and relative to the housing to a second extended position, and extends the cannula relative to the needle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification