Catheter insertion device with retractable needle
First Claim
1. A medical device, comprising:
- a hollow housing;
a needle having a sharpened tip operable between a projecting position in which the sharpened tip projects forwardly from the housing and a retracted position in which the sharpened tip is enclosed within the housing;
a biasing element biasing the needle toward the retracted position;
a catheter telescopingly engaging the needle, wherein the catheter is operable in three positions;
a mounted position in which the catheter engages the needle such that the sharpened tip of the catheter projects forwardly from the catheter;
a sheathed position displaced axially forwardly of the mounted position so that the catheter sheathes the sharpened tip of the needle; and
a removed position in which the catheter is removed from the needle;
a lock releasably locking the catheter in the sheathed position;
wherein displacing the catheter from the sheathed position to the removed position operates to release the needle so that the biasing element displaces the needle into the retracted position.
1 Assignment
0 Petitions
Accused Products
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. The 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. A method for inserting a catheter is also provided, in which the needle is hooded by the catheter during the insertion procedure.
-
Citations
31 Claims
-
1. A medical device, comprising:
-
a hollow housing;
a needle having a sharpened tip operable between a projecting position in which the sharpened tip projects forwardly from the housing and a retracted position in which the sharpened tip is enclosed within the housing;
a biasing element biasing the needle toward the retracted position;
a catheter telescopingly engaging the needle, wherein the catheter is operable in three positions;
a mounted position in which the catheter engages the needle such that the sharpened tip of the catheter projects forwardly from the catheter;
a sheathed position displaced axially forwardly of the mounted position so that the catheter sheathes the sharpened tip of the needle; and
a removed position in which the catheter is removed from the needle;
a lock releasably locking the catheter in the sheathed position;
wherein displacing the catheter from the sheathed position to the removed position operates to release the needle so that the biasing element displaces the needle into the retracted position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
-
-
14. A medical device, comprising:
-
a hollow housing;
a needle having a sharpened tip operable in a projecting position which tip projects forwardly from the housing and a retracted position in which the sharpened tip is enclosed within the housing;
a biasing element biasing the needle toward the retracted position;
a catheter telescopingly engaging the needle, wherein the catheter is operable in three positions;
a mounted position in which the catheter engages the needle such that the sharpened tip of the catheter projects forwardly from the catheter;
a sheathed position displaced axially forwardly of the mounted position so that the catheter sheathes the sharpened tip of the needle; and
a removed position in which the catheter is removed from the needle;
a radially deformable arm releasably maintaining the needle in the projecting position against the bias of the biasing element, wherein the arm comprises;
a first recess cooperable with the catheter when the catheter is disposed in the mounted position; and
a second recess cooperable with the catheter when the catheter is disposed in the sheathed position;
wherein displacing the catheter from the sheathed position to the removed position operates to release the needle so that the biasing element displaces the needle into the retracted position. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
-
-
28. A method for inserting a catheter into a patient, providing the steps of:
-
providing a catheter insertion device having a housing and a needle with a sharpened tip for inserting the catheter;
piercing a patient with the sharpened tip of the needle;
advancing the catheter relative to the needle so that the catheter sheathes the sharpened tip;
releasably locking the catheter in the advanced position to impede rearward displacement of the catheter relative to the needle;
inserting the advanced catheter into the patient; and
shielding the needle so that the sharpened tip of the needle is shielded after use. - View Dependent Claims (29, 30, 31)
-
Specification