KR-20260064265-A - NEEDLE DEVICE FOR INSERTING CATHETER

KR20260064265AKR 20260064265 AKR20260064265 AKR 20260064265AKR-20260064265-A

Abstract

The present invention comprises: a needle having a hollow needle body having an acute-angled tip portion at the front end and a central through hole formed in the longitudinal direction, and a needle handle provided at the rear end of the needle body and having a connecting passage inside that communicates with the central through hole of the needle; an expander having an expander tube that accommodates the needle body through a through hole in the central axis direction and has an overall length shorter than the overall length of the needle body, and an expander handle provided at the rear end of the expander tube, having a coupling hole formed inside that communicates with the through hole of the expander tube, and having the front end of the needle handle detachably coupled to the coupling hole; and a connector having a connecting portion at the front end that is coupled to the rear end of the needle handle, and having a through passage formed in the longitudinal direction that communicates with the connecting passage of the needle handle and allows a guide wire to pass through. The present invention provides a catheter insertion needle device comprising a guide wire that passes through the through passage of the connector and the connecting passage of the needle handle, passes through the central through hole of the needle that punctured the blood vessel with the dilator attached, is inserted into the blood vessel, guides the catheter into the blood vessel by fitting it so that the inside of the catheter passes longitudinally after the dilator and the needle are removed together, and is then removed from the catheter.

Inventors

김용현

Assignees

김용현

Dates

Publication Date: 20260507
Application Date: 20241031

Claims (4)

A needle having a hollow needle body having an acute-angled tip portion at the front end and a central through hole formed in the longitudinal direction, and a needle handle provided at the rear end of the needle body and having a connecting passage inside that communicates with the central through hole of the needle, An expander having an expander tube that accommodates the needle body through a through hole in the central axis direction and has an overall length shorter than the overall length of the needle body, and an expander handle provided at the rear end of the expander tube, having a coupling hole formed inside that communicates with the through hole of the expander tube, and having the front end of the needle handle detachably coupled to the coupling hole. A connector having a connecting portion at the front end coupled to the rear end of the needle handle, and having a through passage formed in the longitudinal direction that communicates with the connecting passage of the needle handle and allows a guide wire to pass through, A catheter insertion needle device comprising a guide wire that passes through the through passage of the connector and the connecting passage of the needle handle, passes through the central through hole of the needle that punctured the blood vessel with the dilator attached, is inserted into the blood vessel, guides the catheter into the blood vessel by fitting it so that the inside of the catheter passes longitudinally after the dilator and the needle are removed together, and is then removed from the catheter.
In paragraph 1, A needle device for catheter insertion, wherein the needle handle is made of a transparent or translucent material, allowing visual confirmation of blood flowing out through the needle body to the needle handle when puncturing a blood vessel with the needle.
In paragraph 1 or 2, A needle device for catheter insertion, wherein the through passage of the above connector is provided with a tapered funnel-shaped guide portion such that the inner diameter gradually decreases toward the connection portion.
In paragraph 1 or 2, A catheter insertion needle device that punctures a blood vessel using the needle together with the dilator, and after the guide wire is inserted into the blood vessel by passing through the through passage of the connector, the connecting passage of the needle handle, and the central through hole of the needle, moves the dilator forward to separate it from the front end of the needle handle, moves it along the guide wire to insert the dilator tube into the blood vessel to dilate the blood vessel, and after the blood vessel is dilated, removes the needle together with the dilator.

Description

Needle device for inserting catheter The present invention relates to a needle device for catheter insertion, and more specifically, to a needle device for catheter insertion used when inserting a catheter into a blood vessel using the Seldinger Technique. A catheter is used to continuously infuse drugs, such as anticancer agents or antibiotics, into a patient. Typically, the catheter is inserted into the patient's blood vessel, and a drug infusion device is attached to the inserted catheter to continuously infuse a certain amount of drug into the patient's body from the drug infusion device. As one method of inserting a catheter used for such continuous drug infusion, the Seldinger method is known. An example of a needle device for catheter insertion used in the Seldinger method is disclosed in Patent Document 1 below. Referring to FIG. 1, the method of inserting a catheter into a blood vessel using the conventional Seldinger method described above is as follows: First, the skin (S) and the blood vessel (V) are punctured with a hollow needle (1) (Fig. 1 (a)). Once the tip of the needle (1) is introduced into the blood vessel by puncturing the skin (S) and the blood vessel (V), the needle (1) is fixed, and a guide wire (2) is inserted into the blood vessel through the hollow of the fixed needle (1) (Fig. 1 (b)). The needle (1) is retracted to remove the needle (1) from the guide wire (2) (Fig. 1 (c)). A dilator (3) is inserted along the guide wire (2) from which the needle has been removed to expand the punctured portion of the blood vessel (Fig. 1 (d)). Then, the dilator (3) is removed (Fig. 1 (e)), and a catheter (4) is inserted along the guide wire (2) (Fig. 1 (f)). After inserting the catheter (4), the guide wire (2) is retracted and removed from the catheter (4) ((g) of FIG. 1). Subsequently, a syringe is connected to the connector of the inserted catheter to supply medication or blood into the patient's blood vessels through the syringe. In the aforementioned conventional technology, when puncturing the skin and blood vessels with a needle, whether the needle has been properly and accurately inserted into the blood vessel is verified by whether blood leaks out through the needle. That is, if blood leaks out through the punctured needle, it is confirmed that the needle has accurately punctured the blood vessel; if no blood leaks out from the needle, it is confirmed that the needle has not accurately punctured the blood vessel. If blood is discharged through the needle, it is confirmed that the needle has been inserted in the correct position within the blood vessel, and a guide wire is inserted into the blood vessel through the hollow of the needle. However, in the aforementioned conventional technology, there was a problem in that excessive blood could leak from the needle after insertion until the guide wire was inserted. In addition, in conventional technology, when inserting a dilator, the insertion and removal of the needle and the insertion and removal of the dilator must be performed separately, so the entire process for catheter insertion is complex and there is a risk of causing confusion to the operator. Therefore, the technical field related to catheter insertion needle devices to which this invention belongs also requires continuous technological improvement, just like other technical fields. Meanwhile, it should be understood that the matters described above as background technology are intended solely to enhance understanding of the background of the present invention and are not cited as an approval that they can be used as "prior art" of the present invention. FIG. 1 is a diagram showing the process of inserting a catheter in steps using a conventional needle device for catheter insertion using the Seldinger method, (a) is a diagram showing the step of puncturing the skin and blood vessels with a needle, and (b) is a drawing showing the state in which a guide wire is inserted into a blood vessel through a needle, and (c) is a drawing showing the state with the needle removed from the guide wire, and (d) is a drawing showing the state in which an expander is inserted along a guide wire, and (e) is a drawing showing the state in which the expander has been removed from the guide wire, and (f) is a drawing showing the state of inserting a catheter along a guide wire, and (g) This is a drawing showing the state after removing the guide wire from the catheter. FIG. 2 is an exploded perspective view of a needle device for catheter insertion according to one embodiment of the present invention. FIG. 3 is a cross-sectional view of a catheter insertion needle device according to one embodiment of the present invention. FIG. 4 is a drawing showing the state in which the needle and the dilator of a catheter insertion needle device according to one embodiment of the present invention are separated. FIG. 5 is a longitudinal cross-sectional view of a connector-blood chamber assembly of a catheter ins