Medical component insertion device including a retractable needle
First Claim
1. An insertion device for inserting an introducer assembly into a body of a patient, the introducer assembly including a sheath and a dilator coaxially disposed in the sheath, the dilator defining a bore, the sheath and dilator each having a hub, the sheath hub threadably engaging a distal end of the dilator hub, the insertion device comprising:
- a needle removably disposed within the bore of the dilator; and
a retraction assembly including a housing in which a needle hub is disposed, the needle hub attached to a proximal end of the needle, the housing threadably engaging a proximal end of the dilator hub, the retraction assembly and dilator being removable from the sheath after placement thereof within the patient body is complete, the removal of the retraction assembly causing removal of the needle from the sheath, the retraction assembly capable of producing relative positions of the needle and the introducer assembly, the relative positions including;
a first locked position wherein a distal tip of the needle is disposed a predetermined distance distal to a distal end of the introducer assembly,a second locked position wherein the needle distal tip is disposed proximal to the needle distal tip in the first locked position and distal but proximate to the distal end of the introducer assembly, anda third locked position wherein the needle distal tip is retracted within the dilator bore,the needle hub movably disposed in the housing to move the needle between the first, second, and third locked positions, the needle hub including at least one protruding feature to engage at least one recessed feature of the housing to releasably lock the needle hub and maintain the needle in each of the first, second, and third locked positions.
1 Assignment
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Accused Products
Abstract
An insertion device for use in assisting with the placement of a medical device within the body of a patient is disclosed. For example, the insertion device can be employed to assist with the placement of an introducer, which provides a conduit for insertion of a catheter into the body. In one embodiment, the insertion device comprises a needle that is removably disposed within a bore defined by the medical device, and a needle retraction assembly. The needle retraction assembly can position the needle in any one of a first position wherein a distal tip of the needle is disposed a predetermined distance distal to a distal end of the medical device, a second position wherein the needle distal tip is disposed distal but proximate to the distal end of the medical device, and a third position wherein the needle distal tip is retracted within the medical device bore.
339 Citations
6 Claims
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1. An insertion device for inserting an introducer assembly into a body of a patient, the introducer assembly including a sheath and a dilator coaxially disposed in the sheath, the dilator defining a bore, the sheath and dilator each having a hub, the sheath hub threadably engaging a distal end of the dilator hub, the insertion device comprising:
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a needle removably disposed within the bore of the dilator; and a retraction assembly including a housing in which a needle hub is disposed, the needle hub attached to a proximal end of the needle, the housing threadably engaging a proximal end of the dilator hub, the retraction assembly and dilator being removable from the sheath after placement thereof within the patient body is complete, the removal of the retraction assembly causing removal of the needle from the sheath, the retraction assembly capable of producing relative positions of the needle and the introducer assembly, the relative positions including; a first locked position wherein a distal tip of the needle is disposed a predetermined distance distal to a distal end of the introducer assembly, a second locked position wherein the needle distal tip is disposed proximal to the needle distal tip in the first locked position and distal but proximate to the distal end of the introducer assembly, and a third locked position wherein the needle distal tip is retracted within the dilator bore, the needle hub movably disposed in the housing to move the needle between the first, second, and third locked positions, the needle hub including at least one protruding feature to engage at least one recessed feature of the housing to releasably lock the needle hub and maintain the needle in each of the first, second, and third locked positions. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification