KR20110033892A - Catheter and catheter assembly - Google Patents

Abstract

PURPOSE: A catheter and a catheter assembly are provided to move around an affected part freely and to reduce the burden about the human body in surgical operation. CONSTITUTION: A catheter comprises: a spring(110) rolled in a coil type in order to form a drug administration path; a tube(120) which covers the spring; and a stylet(130) which is inserted through the inside of the spring in order to selectively provide rigidity to the spring. The spring includes: a coil body arranged inside the tube; and a tip(112) which exposes outside through one end of the tube and includes an exhausting part for discharging drug.

Description

Catheters and Catheters Assemblies {CATHETER AND CATHETER ASSEMBLY}

The present invention relates to a catheter and catheter assembly used for epidural decompression neuroplasty, and more particularly, to a catheter and catheter assembly for injecting drugs, such as local anesthetics inserted into the epidural side.

In general, epidural decompression neuroplasty is a procedure to selectively block the spinal nerve by inserting an injection tube into the epidural side surrounding the intradural spinal cord and injecting a local anesthetic.

The epidural decompression neuroplasty may be applied to patients suffering from pain, inflammation, adhesion, recurrence, etc., patients with low back pain and spinal stenosis, patients suffering from back pain due to neuroadhesion, patients with sciatica, etc. .

Epidural endoscopy is mainly used as a type of epidural decompression neuroplasty, and a special catheter is required for the epidural endoscopy.

The catheter is provided to have a diameter of 2mm and a length of about 30cm, the recording means is mounted on the tip of the catheter, the optical cable is installed to penetrate the inside of the catheter to capture the image taken by the shooting means Send to the monitor.

However, the epidural endoscopic procedure using the catheter has a problem in that the procedure is not easy and the treatment site can not be limited because the operator should perform the procedure while monitoring only the image acquired through the photographing means.

And the thickness of the catheter by the photographing means and the optical cable installed in the catheter had a problem that the manufacturing cost is increased.

In addition, in order to insert the thick catheter into the epidural part, the procedure is complicated by the incision of a part of the patient's body. After the procedure, the patient has to be inserted into the patient's body for a certain period of time to inject the drug, so the behavior is inconvenient and the patient has a fear of surgery.

The present invention was devised to solve the problems of the conventional epidural endoscopy described above, the object of the present invention can move around the affected area freely, the thickness is minimized to reduce the burden on the human body during the procedure The present invention provides a catheter and a catheter assembly for epidural decompression neurosurgery, which requires no surgical incision and can reduce manufacturing costs.

The present invention for achieving the above object is a spring wound in the form of a coil to form a drug injection passage; A tube covering and covering the spring; And a stylet inserted through the spring to selectively provide rigidity to the spring.

The spring includes: a coil body disposed inside the tube; And a tip exposed outward through one end of the tube and having a discharge portion for discharging the drug.

And one side of the discharge portion of the winding pitch of the spring is in close contact is provided with a close contact having a first pitch; The discharge portion has a second pitch of winding distance of the spring for the drug discharge.

In another aspect, the present invention provides a catheter including a spring in the form of a coil and a tube surrounding and covering the spring; And an adapter coupled in communication with the catheter for injecting the drug into the catheter; It includes.

The adapter may include a first adapter body having a first insertion hole into which the catheter is inserted; A second adapter body having a second insertion hole into which the inlet end of the catheter passed through the first insertion hole and an injection hole for injecting a drug into the catheter are formed; Coupling means for coupling the first adapter body and the second adapter body; Fixing means for fixing the catheter to the first adapter body and the second adapter body; .

And the fixing means includes: at least two fixing protrusions protruding from the first body to form a passage through which the mouth end of the catheter passes; And selectively pressurizing the fixing protrusions so that the inlet end of the catheter is fixed to the adapter according to the rotation angle formed by the first adapter body and the second adapter body to narrow a passage through which the inlet end of the catheter passes. Pressing unit; It includes.

The coupling means is formed on any one of the engaging jaw formed on any one of the outer wall of the fixing projections and the inner wall of the receiving groove for receiving a portion of the fixing projections, and the other of the outer wall of the fixing projections and the inner wall of the receiving groove And a locking groove through which the locking jaw is supported.

The apparatus may further include locking means for maintaining rotation of the inlet end of the catheter by limiting rotation between the first adapter body and the second adapter body, wherein the locking means includes: the first adapter body and the second adapter body; A first stopper is formed to have a hook pin in any one of the adapter body; And a second stopper formed to have a hook hole into which the hook pin is inserted into the other one of the first adapter body and the second adapter body. It includes.

According to the catheter and the catheter assembly according to the present invention described above has the following effects.

First, according to the present invention, since the spring constituting the body of the catheter and the spring inserted into the human body can be flexibly elastically flexible, the insertion path of the catheter can be easily manipulated and can be flexibly inserted into the affected part. The destruction of tissues of the human body can be minimized or prevented.

Second, the drug introduced into the drug injection passage of the spring is discharged to the discharge portion of the spring can supply the drug to the correct position.

Third, according to the present invention, the rigidity of the spring is increased by the stylet inserted into the spring, thereby easily removing the adhesion part of the tissue.

Fourth, according to the present invention, it is possible to quickly and easily fix the catheter to the adapter by rotating the second adapter body of the adapter.

Fifth, according to the present invention, since the catheter has a thickness of 0.8mm to 1.1mm, there is no need to cut the body of the patient, thereby simplifying the procedure and reducing the fear of the patient's procedure. Miniaturization can reduce manufacturing costs.

Sixth, according to the present invention, by performing the procedure while continuously observing the affected part of the patient with an image guide device such as X-ray, there is an advantage that can achieve an accurate and safe procedure.

Hereinafter, preferred embodiments of the catheter according to the present invention will be described in more detail with reference to the accompanying drawings.

1 is a perspective view showing a catheter according to the present invention, Figure 2 is a cross-sectional view showing a catheter according to the present invention.

1 and 2, the catheter 100 according to the present invention includes a coil-shaped spring 110, a tube 120, and a stylet 130. While looking at an image taken from the outside, for example, an image monitor obtained by an X-ray imaging apparatus, the catheter is inserted into the human body to reach a drug injection position, thereby performing epidural decompression neuroplasty.

The spring 110 is for forming an injection passage of the drug, is formed by winding a wire of a metal material having a predetermined elasticity in the form of a coil, it is preferably formed of a material harmless to the human body.

In addition, the spring 110 has a coil body 111 disposed inside the tube 120 and a tip 112 exposed to the outside of the tube 120 through one end of the tube 120.

The tip 112 forms a discharge part 112b for discharging the drug, which will be described in detail later.

The tube 120 is provided to surround the spring 110 and may be formed by covering the spring 110 with a material such as silicon or a composite resin.

A position display unit 121 may be provided outside the tube 120, and the degree (length, position) of the catheter 100 inserted into the human body may be determined through the position display unit 121. For example, the position indicator may include rulers displayed on an outer surface of the tube 120, and the rulers are spaced apart from each other at regular intervals along the length direction of the tube.

The stylet 130 is provided to selectively provide rigidity to the spring 110, and is inserted through the spring 110. In other words, when the stylet 130 is inserted through the spring 110, the stylet 130 supports the spring 110 to add rigidity so that the spring 110 is not bent. In this case, the front end of the stylet 130 may be supported by being in contact with the front end of the spring 110, and a stylet hub for manipulating the stylet 130 may be provided at the rear end of the stylet 130. .

Accordingly, the stylet 130 is inserted into the spring 110 to be inserted into the epidural of the patient in a state where the rigidity is increased, and the adhesion portion of the tissue can be easily removed through the increased rigidity.

Referring to FIG. 3, the tip 112 of the spring 110 includes a close contact portion 112a, a discharge portion 112b, and a support portion 111c.

The close contact portion 112a has a first pitch P1 because the winding pitch of the spring 110 is closely contacted with each other. In other words, the close part 112a has a dense winding pitch to minimize or prevent the drug injected into the human body through the spring 110 from leaking before reaching the discharge part 112b.

The discharge part 112b has a second pitch P2 such that the winding pitch of the spring 110 is spaced apart to allow drug leakage. (P1 <P2)

Accordingly, when the drug reaches the discharge part 112b, the drug may be supplied to the human tissue, that is, the affected part through the discharge part 112b. Therefore, the catheter 100 is inserted into the human body while adjusting the stylet 130 so that the outlet 112b can be accurately positioned on the affected part.

The support portion 113 is for supporting the tip of the stylet 130 inserted into the spring 110, provided in a ball shape integrally formed on the tip of the spring 110, the catheter 100 Minimize resistance when inserting it into the human body and minimize or prevent damage to human tissue.

When the front end of the stylet 130 reaches the ball-shaped support part 113 and is supported by the support part 113, the entire spring 110 becomes straight rigid, and the front end of the stylet 130 is provided. When the stylet 130 is adjusted to be spaced apart from the support part 113 by a predetermined distance, the front end of the spring 110, more specifically, the tip 112 can be flexibly and elastically bent to the cardet. The insertion path of the rotor 100 can be freely adjusted.

On the other hand, the catheter 100 according to the present invention is preferably formed to have a length of 30.5cm to 84.5cm to be fully inserted to the affected part.

In addition, the catheter 100 may be provided to have a thickness of 0.8mm to 1.1mm, thereby eliminating the need to incise the patient's body can simplify the procedure and reduce the fear of the procedure felt by the patient. .

The following describes the preferred embodiment of the catheter assembly according to the present invention in more detail with reference to the accompanying drawings.

Figure 4 is a combined perspective view showing a catheter assembly according to the invention, Figure 5 is an exploded perspective view showing a catheter assembly according to the invention, Figure 6 is a cross-sectional view showing a cross-section of the catheter assembly according to the present invention. to be.

4 to 6, the catheter assembly according to the present invention includes a catheter 100 and an adapter 200.

The contents described in the above embodiments may be applied to the catheter 100 in the same manner, and a repetitive description thereof will be omitted.

The adapter 200 is for injecting drugs into the catheter 100 and is coupled to communicate with the catheter 100.

The adapter 200 includes a first adapter body 210, a second adapter body 220, a fixing means, a coupling means, and a locking means.

The first adapter body 210 includes a first insertion hole 211 into which the catheter 100 is inserted, and the second adapter body 220 passes through the first insertion hole 211. It has a second insertion hole 221 is inserted into the inlet end of the catheter 100.

In addition, the second adapter body 220 further includes an injection hole 222 for injecting a drug into the catheter 100, wherein the injection hole 222 communicates with the second insertion hole 221. Prepared.

The fixing means is for fixing the catheter 100 to the first adapter body 210 and the second adapter body 220, the fixing protrusion 212, the receiving groove 223, the pressing portion And 224.

The fixing protrusion 212 protrudes from the first adapter body 210 toward the second adapter body 220 and is provided in two or more so as to form a passage through which the inlet end of the catheter 100 passes. do.

The receiving groove 223 may be formed on a surface facing the first adapter body 210 to accommodate a part of the fixing protrusions 212, and may be formed to have a circular cross section.

The pressing unit 224 may be provided in the shape of a groove extending from the receiving groove 223 to form a square cross section.

The pressing unit 224 selectively fixes the inlet end of the catheter 100 to the adapter 200 according to the rotation angle formed by the first adapter body 210 and the second adapter body 220. Perform the function.

That is, as shown in (a) of FIG. 7, when the front ends of the fixing protrusions 212 are inserted into the pressing unit 224 through the receiving groove 223, the fixing protrusions 212. Is spaced apart from the inlet end of the catheter 100 by a predetermined distance to release the fixing of the inlet end of the catheter 100.

As shown in FIG. 7B, when the fixing protrusions 212 are rotated, a passage through which the inlet end of the catheter 100 penetrates by the pressing unit 224 narrows the catheter. The inlet end of the rotor 100 is fixed to the adapter 200.

Coupling means is provided with a locking step 213 formed on the outer side of the fixing projections 212 and the locking groove 225 is formed on the inner wall of the receiving groove 223 is supported by the locking step 213 In some embodiments, the locking jaw 213 may be formed on the inner wall of the accommodation groove 223, and the locking groove 225 may be formed on the outside of the fixing protrusions 212.

Locking means is to maintain the fixing of the inlet end of the catheter 100 by limiting the rotation between the first adapter body 210 and the second adapter body 220, the first adapter body 210 A first stopper 214 formed at the second stopper and a second stopper 226 formed on the second adapter body 220 and supported by the first stopper 214 may be included.

In addition, a hook pin 215 having a hook shape is formed in the first stopper 214, and a hook hole 227 in which the hook pin 215 is inserted is formed in the second stopper 226, thereby forming the first stopper 214. The coupling between the first stopper 214 and the second stopper 226 can be securely formed, and according to an embodiment, the hook pin 215 is formed in the second stopper 226, and the hook hole 227 is formed. It may be formed on the first stopper 214.

The following describes a procedure using the catheter assembly of the present invention.

First, a needle (RX Coude) for inserting the catheter 100 is selected and inserted into the epidural space of the patient until the tip of the selected needle is firmly seated in the inter ligament of the patient.

Thereafter, the catheter 100 is inserted into the epidural space of the patient through the needle, while the position display unit 121 of the catheter 100 is viewed while viewing an image obtained through an image guide device for photographing the epidural portion of the patient. Reference to the catheter 100 advances.

Here, as the image guide device, an X-ray capable of tomography the inside of the human body may be used, and a special drug such as a contrast agent may be introduced through the catheter 100 to obtain a clearer image.

Subsequently, when the tip 112 of the catheter 100 is inserted into the epidural space, the stylet 130 of the catheter 100 is removed, and then the adapter 200 is coupled with the catheter 100. Let's do it.

Then, a high concentration of saline is injected through the injection hole 222 of the adapter 200 to remove the adhesion site of the tissue causing pain of the patient, and then a therapeutic solution made by mixing a steroid and a local anesthetic is injected.

As such, by inserting the catheter 100 according to the present invention into the epidural space and administering a special drug to the inside of the catheter 100 to release the compression of the nerve bundle due to scars or scars generated by the epidural space after the spinal surgery. In addition, the nerve squeezes the inflammation in the area, and can remove the pain-causing foreign body.

Having looked at the preferred embodiment according to the present invention as described above, in addition to the embodiment described above, the fact that the present invention can be embodied in other specific forms without departing from the spirit or scope of the present invention It is obvious to them.

Therefore, the above-described embodiments should be regarded as illustrative rather than restrictive, and thus, the present invention is not limited to the above description and may be modified within the scope of the appended claims and their equivalents.

1 is a perspective view showing a catheter according to the present invention.

2 is a cross-sectional view showing a catheter according to the present invention.

Figure 3 is an enlarged view showing an enlarged portion of the catheter according to the present invention.

4 is a perspective view showing a catheter assembly according to the present invention Figure 4 in accordance with the present invention.

5 is an exploded perspective view showing a catheter assembly according to the present invention.

Figure 6 is a cross-sectional view showing a cross section of the catheter assembly according to the present invention.

7 (a) and 7 (b) are schematic diagrams schematically showing a state in which a catheter according to the present invention is fixed or released from an adapter.

Explanation of symbols on the main parts of the drawings

100: catheter 110: spring

120: tube 130: stylet

111: coil body 112: tip

112a: close contact portion 112b: discharge portion

112c: support 200: adapter

210: first adapter body 220: second adapter body

Claims (8)

A spring wound in the form of a coil to form a drug inlet passage; A tube covering and covering the spring; And And a stylet inserted through the spring to selectively provide rigidity to the spring. The method of claim 1, The spring is, A coil body disposed inside the tube; And And a tip exposed outward through one end of the tube, the tip having an outlet for discharging the drug. The method of claim 1, One side of the discharge part is provided with a close contact with the first pitch of the winding pitch of the spring is tightly; And the outlet portion has a second pitch of the winding pitch of the spring spaced apart for the drug discharge. A catheter comprising a spring in the form of a coil and a tube surrounding and covering the spring; And An adapter coupled in communication with the catheter for injecting the drug into the catheter; Catheter assembly comprising a. The method of claim 4, wherein The adapter, A first adapter body having a first insertion hole into which the catheter is inserted; A second adapter body having a second insertion hole into which the inlet end of the catheter passed through the first insertion hole and an injection hole for injecting a drug into the catheter are formed; Coupling means for coupling the first adapter body and the second adapter body; And Fixing means for fixing the catheter to the first adapter body and the second adapter body; Catheter assembly comprising a. The method of claim 5, The fixing means, At least two fixing protrusions protruding from the first body to form passages through which the inlet end of the catheter passes; And Pressing the fixing protrusions selectively to fix the inlet end of the catheter to the adapter according to the rotation angle formed by the first adapter body and the second adapter body to narrow a passage through which the inlet end of the catheter passes. part; Catheter assembly comprising a. The method of claim 5, The coupling means, The locking jaw is formed on any one of the outer side of the fixing projections and the inner wall of the receiving groove for receiving a portion of the fixing projections, and formed on the other one of the outer side of the fixing projections and the inner wall of the receiving groove is caught A catheter assembly comprising a retaining groove supported. The method of claim 5, Locking means for maintaining the fixing of the inlet end of the catheter by limiting the rotation between the first adapter body and the second adapter body, The locking means, A first stopper formed to have a hook pin in one of the first adapter body and the second adapter body; And A second stopper formed to have a hook hole in which the hook pin is inserted into the other one of the first adapter body and the second adapter body; Catheter assembly comprising a.

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