Catheter insertion device with retractable needle
First Claim
Patent Images
1. A medical device, comprising:
- a hollow housing;
a catheter mounted on the housing;
a needle having a sharpened tip operable between an extended position extending forwarding from the housing and a retracted position in which the sharpened tip of the needle is enclosed in the housing;
a biasing element biasing the needle toward the retracted position; and
a lever mounted on the housing, pivotable between a locked positioned and an unlocked position, wherein the lever has a forward portion and a rearward portion, the forward portion directly engaging the catheter preventing the lever from pivoting into the unlocked position, and the rearward portion being connected with the rearward end of the needle retaining the needle against the bias of the biasing element;
wherein upon removal of the catheter from the housing the catheter disengages the lever allowing the lever to pivot into the unlocked position thereby releasing the needle and the biasing element propels the needle rearwardly into the housing.
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Abstract
A catheter insertion device is provided for inserting an over-the-needle catheter. The device includes an insertion needle that is retractable into the housing of the device after use to prevent exposure to the contaminated needle. A needle retainer releasably retains the needle in an extended position against the rearward bias of the biasing element. The needle retainer engages the hub of the catheter so that when the catheter is removed from the insertion device, the needle retainer automatically releases the needle. The biasing element then propels the needle rearwardly into the housing of the device.
361 Citations
52 Claims
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1. A medical device, comprising:
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a hollow housing; a catheter mounted on the housing; a needle having a sharpened tip operable between an extended position extending forwarding from the housing and a retracted position in which the sharpened tip of the needle is enclosed in the housing; a biasing element biasing the needle toward the retracted position; and a lever mounted on the housing, pivotable between a locked positioned and an unlocked position, wherein the lever has a forward portion and a rearward portion, the forward portion directly engaging the catheter preventing the lever from pivoting into the unlocked position, and the rearward portion being connected with the rearward end of the needle retaining the needle against the bias of the biasing element; wherein upon removal of the catheter from the housing the catheter disengages the lever allowing the lever to pivot into the unlocked position thereby releasing the needle and the biasing element propels the needle rearwardly into the housing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A medical device comprising:
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a body; a needle projecting from the body; a releasable member removably attached to the body; a needle retainer engaging the releasably member, comprising a pivotable arm operable between a locked positioned and a released position, the needle retainer engaging the needle when the arm is in the locked position so that the needle projects forwardly from the body, and the needle retainer releasing the needle when the arm is in the released position, wherein the needle retainer is biased toward the released position; and a biasing element biasing the needle rearwardly, wherein the releasable member impedes movement of the arm into the released position and removal of the releasable member allows the arm to pivot into the released position. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A medical device, comprising:
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a housing; a catheter removably mounted on the housing; an insertion needle; a needle retainer releasably retaining the insertion needle projecting forwardly from the housing, wherein the needle retainer is constrained to pivotable motion prior to retraction, the needle retainer comprising; a forward portion engaging the catheter; and a rearward portion connected with the needle; a biasing element biasing the needle rearwardly; wherein the needle retainer releases the needle upon removal of the catheter from the housing such that the biasing element propels the needle rearwardly. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40)
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41. A medical device, comprising:
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a catheter having an internal surface and an external surface; a housing onto which the catheter is removably mounted; a needle projecting forwardly from the housing; a biasing element biasing the needle rearwardly; a needle retainer having a first portion engaging the catheter external surface and a second portion connected with the needle, wherein the needle retainer is constrained to pivotable motion prior to retraction; wherein the needle retainer releases the needle in response to removal of the catheter from the housing so that the biasing element propels the needle rearwardly into the housing. - View Dependent Claims (42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52)
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Specification