Catheter introducer assembly with guidewire
First Claim
1. A catheter introducer set comprising:
- a hollow housing having an axial lumen, a proximal end and a distal end;
a needle hub at the distal end of the housing;
a needle having an axial lumen, a proximal end and a distal end, the proximal end being secured to the needle hub;
a guidewire slidably located axially within the lumen of the needle;
a catheter assembly slidably located axially over the needle, the catheter assembly including a catheter adapter;
a plunger slidably located axially within the lumen of the housing, the plunger having a proximal end and a distal end; and
retaining means for releasably retaining the guidewire within the needle lumen such that axial movement of the plunger causes axial movement of the guidewire, the retaining means being adapted to be moveable between a first position in which the guidewire is secured to the plunger and a second position in which the guidewire is released from the plunger.
1 Assignment
0 Petitions
Accused Products
Abstract
A catheter introducer assembly is disclosed. The catheter introducer assembly is made UP of a housing having a needle attached to it. A guidewire is slidably located within the lumen of the needle. A catheter assembly is mounted over the needle. Within the housing is a plunger and secured to the plunger is a retainer for releasably retaining the guidewire within the needle lumen. Axial movement of the plunger causes axial movement of the guidewire. The retainer releasably retains the guidewire. Also disclosed is a method of introducing a catheter into a blood vessel. The method involves the steps of piercing the blood vessel with a sharp needle having a catheter mounted axially on it; sliding a guidewire through the lumen of the needle so that the guidewire protrudes from the distal end of the needle and into the vessel; sliding the catheter over the guidewire and into the vessel; withdrawing the needle from the catheter; and retaining the guidewire within the catheter after withdrawal of the needle.
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Citations
16 Claims
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1. A catheter introducer set comprising:
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a hollow housing having an axial lumen, a proximal end and a distal end; a needle hub at the distal end of the housing; a needle having an axial lumen, a proximal end and a distal end, the proximal end being secured to the needle hub; a guidewire slidably located axially within the lumen of the needle; a catheter assembly slidably located axially over the needle, the catheter assembly including a catheter adapter; a plunger slidably located axially within the lumen of the housing, the plunger having a proximal end and a distal end; and retaining means for releasably retaining the guidewire within the needle lumen such that axial movement of the plunger causes axial movement of the guidewire, the retaining means being adapted to be moveable between a first position in which the guidewire is secured to the plunger and a second position in which the guidewire is released from the plunger. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A catheter introducer set for introducing a catheter into a blood vessel, the catheter introducer set comprising:
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a housing defining a housing lumen; a needle hub on the housing; a needle having a proximal end attached to the needle hub, a distal end and a lumen; a catheter assembly having a cannula and an adapter and said catheter assembly mounted axially on the needle; a guidewire slidably located axially in the needle lumen; means disposed inside the housing lumen for retaining the guidewire within the needle lumen by applying a releasable radial force to the guidewire while the needle is being inserted into the vessel; and means for releasing the guidewire from the means for retaining once the needle has been inserted into the blood vessel such that while the needle is being removed from the cannula, the guidewire remains in the catheter assembly. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A method of introducing a catheter into a blood vessel comprising the steps of:
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piercing the blood vessel with a sharp needle, the needle having a proximal end, a distal end and an axial lumen, the needle further having a catheter mounted axially on the needle and being mounted to a needle hub; sliding a guidewire through the lumen of the needle so that the guidewire protrudes from the distal end of the needle and into the vessel; sliding the catheter over the guidewire and into the vessel; withdrawing the needle from the catheter; and retaining the guidewire within the catheter while withdrawing the needle. - View Dependent Claims (15, 16)
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Specification