CN111359076A

CN111359076A - Angiography catheter convenient to control

Info

Publication number: CN111359076A
Application number: CN202010183990.2A
Authority: CN
Inventors: 熊坤林; 李扬; 李畅; 张伟国; 邱明国; 田川东; 毛勇
Original assignee: Chinese Peoples Liberation Army Army Specialized Medical Center
Current assignee: Chinese Peoples Liberation Army Army Specialized Medical Center
Priority date: 2020-03-16
Filing date: 2020-03-16
Publication date: 2020-07-03
Anticipated expiration: 2040-03-16
Also published as: CN111359076B

Abstract

The invention discloses an angiography catheter convenient to control. The catheter is provided with an inner cavity for the contrast agent to pass through, and the catheter is also provided with an accommodating cavity extending along the axial direction of the catheter and an operation channel communicated with the accommodating cavity. Steering mechanism sets up in holding the intracavity, and steering mechanism includes kicking block, bottom block and crooked elastic component, and kicking block and bottom block are connected respectively to the both ends of elastic component. Operating device includes action bars and operating handle, and the action bars can penetrate the operation passageway in, and the action bars can pass the bottom block and can dismantle the joint with the kicking block, and the rigidity of action bars is greater than the rigidity of elastic component to make the action bars support the elastic component, operating handle is connected with the action bars. When the catheter needs to be inserted into the target blood vessel, the operating rod is controlled through the operating handle, the operating rod is separated from the ejector block, and the elastic piece is bent and reset, so that the catheter is driven to be actively bent and inserted into the target blood vessel, the operation difficulty and time are reduced, and the operation is not influenced.

Description

Angiography catheter convenient to control

Technical Field

The invention relates to the technical field of catheters, in particular to an angiography catheter convenient to control.

Background

Peripheral vascular disease refers to a disease in which the aorta and its branches, except the coronary arteries, are narrowed or occluded or dilated like a tumor. It is mainly characterized by that the atherosclerosis is changed into more, including angiopathy of carotid arteriosclerosis, renal arteriosclerosis and arteriosclerosis of lower limb, etc. so-called peripheral angiopathy, and is commonly seen in old people, in particular in the crowds of hypertension, diabetes, obesity, blood lipid disorder and smoking, etc.. After the blood pressure is increased, the blood flow influences, so that the blood vessel endothelium can be damaged under the pressure of the artery and the branch, and atherosclerosis is caused.

At present, the professional technology for treating peripheral vascular diseases in China is developing vigorously, the traditional operation technology is continuously improved, and the application of new treatment methods, namely interventional therapy, in clinic is becoming wide. In clinical diagnosis of peripheral vascular diseases, an operator selects a contrast catheter with a specific shape according to the geometric characteristics of an operation target area, the contrast catheter is guided by a guide wire in an auxiliary way, the contrast catheter is inserted into a target blood vessel through a vein or an artery, and then contrast agent is injected to generate a contrast effect, so that diagnosis of diseases is realized.

Diagnostic imaging catheters can be divided into selective and non-selective imaging catheters, among which the commonly used non-selective imaging catheters are: the highest flow of the multi-side hole pigtail radiography tube and the multi-side hole straight-head radiography conduit can reach 20-25 ml/s. The selective radiography catheter has different shapes according to the requirements of different parts, for example, the catheter commonly used for several arteries on the aortic arch comprises three catheters of Headhuter I, II and III types and three catheters of Simmon I, II and III types; RDC type catheters and SimmonI, II and III type catheters for renal artery and vein; cobra type I, ii, iii catheters and SHK type catheters for iliac arteries and veins. Most of the selective contrast catheters have no side holes, and the highest flow rate can reach 7-8 ml/s.

However, when the selective contrast catheter and the non-selective contrast catheter are inserted into a target blood vessel through a vein or an artery, the forward extending part of the contrast catheter needs to be accurately controlled to be twisted and bent, and then the catheter is pulled back to be adjusted to be inserted into the target blood vessel.

Disclosure of Invention

Therefore, it is necessary to provide an angiography catheter convenient for manipulation, which solves the problems of difficult manipulation, complicated manipulation and time consumption of the conventional angiography catheter.

An angiographic catheter that facilitates manipulation, comprising:

the catheter is provided with an inner cavity for the contrast agent to pass through, and is also provided with an accommodating cavity extending along the axial direction of the catheter and an operation channel communicated with the accommodating cavity;

the steering mechanism is arranged in the accommodating cavity and comprises a top block, a bottom block and a bent elastic piece, and two ends of the elastic piece are respectively connected with the top block and the bottom block; and

operating device, including action bars and operating handle, the action bars can penetrate in the operation passageway, just the action bars can pass the bottom block with the joint can be dismantled to the kicking block, the rigidity of action bars is greater than the rigidity of elastic component, so that the action bars supports the elastic component, operating handle with the action bars is connected.

In one embodiment, a clamping block is arranged at the end part, far away from the operating handle, of the operating rod, the ejector block is provided with a cavity and a clamping groove communicated with the cavity, and the clamping block can be inserted into the cavity through the clamping groove and is clamped with the side wall of the cavity through rotation of the clamping block.

In one embodiment, the clamping block is rectangular, the clamping groove is a square groove, and the length of the clamping block is greater than the width of the clamping groove.

In one embodiment, two positioning blocks are arranged on the end face of the operation channel, an indication rod is arranged on the operation handle, and the indication rod is located between the two positioning blocks.

In one embodiment, the catheter comprises a main body, a bending part and a head part, the bending part is positioned between the main body and the head part, the accommodating cavity is arranged in the bending part, the head part is connected with the bending part, the bending part is detachably connected with the main body, and the operation channel is opened on the main body.

In one embodiment, a boss is formed at an end of the main body, an external thread is formed on an outer wall of the boss, an internal thread is formed on an inner wall of the bent portion, and the bent portion is in threaded connection with the boss.

In one embodiment, the end of the main body away from the bending part is provided with a connector.

In one embodiment, a stop block is arranged on the side wall of the operating rod, the stop block is positioned on one side, away from the top block, of the bottom block, a spring is sleeved on the operating rod, and two ends of the spring are respectively abutted to the bottom block and the stop block.

In one embodiment, the side wall of the bottom block far away from the top block is provided with a positioning groove, and the end part of the spring is inserted into the positioning groove.

In one embodiment, the operating rod is a metal rod, the elastic member is a metal tube, and the side wall of the metal tube is hollowed.

Above-mentioned angiogram pipe convenient to control, before the pipe inserts intravascular, penetrate the action bars in the operation passageway, and make the action bars pass the bottom block and can dismantle the joint with the kicking block. When the front end of the catheter corresponds to the inlet of the target blood vessel, the catheter is twisted to enable the bending direction of the catheter to face the target blood vessel, then the operating rod is controlled through the operating handle to enable the operating rod to be separated from the ejector block, the elastic piece is bent and slowly reset, and the catheter is actively bent and inserted into the target blood vessel. In the process of inserting the radiography catheter, the catheter is bent after being twisted and adjusted, the bent catheter is prevented from being twisted in a blood vessel, the operation difficulty is higher, meanwhile, the catheter does not need to be stretched forwards or pulled back, the insertion process is simple, the operation difficulty and time are reduced, and the operation is not influenced.

Drawings

FIG. 1 is a schematic structural view of an angiographic catheter for ease of manipulation in one embodiment;

FIG. 2 is a diagrammatic view of the trailing end face of the angiographic catheter of FIG. 1 for ease of manipulation;

FIG. 3 is a schematic view of the steering mechanism disposed within the conduit;

FIG. 4 is a schematic view of the connection of the operating mechanism to the steering mechanism;

FIG. 5 is a schematic structural view of the steering mechanism of FIG. 4;

FIG. 6 is a schematic view of the lever of FIG. 4 engaged with the top block;

FIG. 7 is a schematic view of the elastic member bending to drive the conduit to bend after the operating rod is separated from the top block in FIG. 4;

fig. 8 is a schematic view of the angiographic catheter of fig. 1 inserted into a blood vessel for convenient manipulation.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather should be construed as broadly as the present invention is capable of modification in various respects, all without departing from the spirit and scope of the present invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Referring to fig. 1 and 3, one embodiment of a catheter for angiography that is easily maneuvered for use in an angiography procedure. Specifically, the catheter for angiography convenient to manipulate includes a catheter 10, a steering mechanism 20, and an operating mechanism 30.

Referring also to fig. 2, a catheter 10 is used to penetrate into a blood vessel and to direct a contrast agent into the target vessel. The catheter 10 is provided with a lumen 12 for passage of the contrast agent, the lumen 12 extending through the entire catheter 10 in the axial direction of the catheter 10. The catheter 10 is further provided with a housing chamber 14, the housing chamber 14 is formed to extend in the axial direction of the catheter 10, and the housing chamber 14 is used for housing the steering mechanism 20. The catheter 10 is provided with an operation passage 16 communicating with the accommodation chamber 14, and the operation mechanism 30 controls the steering mechanism 20 through the operation passage 16.

Specifically, the catheter 10 comprises a main body 110, a bending part 120 and a head part 130, wherein the bending part 120 is positioned between the main body 110 and the head part 130, the head part 130 is connected with the bending part 120, and the end part of the head part 130 is in a truncated cone shape, so that the catheter 10 can conveniently pass through a blood vessel. The bending part 120 and the body 110 are detachably coupled. The inner cavity 12 extends through the body 110, the curved portion 120 and the head portion 130, the accommodating cavity 14 is opened on the curved portion 120, and the operation passage 16 is opened on the body 110. The end of the main body 110 away from the bending part 120 is provided with a connector 140, and the connector 140 is used for connecting with the contrast apparatus. The outer wall of the body 110 is provided with an indication line for indicating a bending direction of the bending part 120.

In one embodiment, the end of the body 110 is formed with a boss 112, an outer wall of the boss 112 is provided with an external thread, an inner wall of the bent portion 120 is provided with an internal thread, and the bent portion 120 and the boss 112 are threadedly coupled, thereby achieving the detachable coupling of the bent portion 120 and the body 110. The flexure 120 and the body 110 are removably connected to facilitate loading of the steering mechanism 20 into the receiving cavity 14 and replacement of the steering mechanism 20. Specifically, the sidewall of the body 110 is grooved to form the boss 112. Of course, the end of the body 110 may also be reduced in diameter to form the boss 112.

Referring to fig. 4, a steering mechanism 20 is disposed in the accommodating cavity 14, and the steering mechanism 20 is used for driving the catheter 10 to achieve active steering. Specifically, the steering mechanism 20 includes a top block 210, a bottom block 220, and a curved elastic member 230. The elastic member 230 is located between the top block 210 and the bottom block 220, two ends of the elastic member 230 are respectively connected with the top block 210 and the bottom block 220, the steering mechanism 20 is assembled and then loaded into the accommodating cavity 14, wherein the top block 210 is located at the bottom of the accommodating cavity, and the bottom block 220 abuts against the boss 112 of the main body 110, so that the steering mechanism 20 is limited.

The operating mechanism 30 comprises an operating rod 310 and an operating handle 320, the operating rod 310 can penetrate into the operating channel 16, and the operating rod 310 can penetrate through the bottom block 220 and be detachably clamped with the top block 210. The operating handle 320 is connected with the operating rod 310, and the operating handle 320 is used for driving the operating rod 310 to move and rotate, so that the operating rod 310 is clamped and disconnected with the top block 210.

Referring to fig. 5 and fig. 6, specifically, a latch 312 is disposed at an end of the operating rod 310 away from the handle, the bottom block 220 is disposed with a communication hole 222, the top block 210 is disposed with a cavity 212 and a latch groove 214 communicated with the cavity 212, and after the latch 312 passes through the communication hole 222, the latch can be inserted into the cavity 212 through the latch groove 214 and is latched with a sidewall of the cavity 212 by rotating the latch 312. Specifically, the latch 312 is rectangular, the slot 214 is a square slot, the length of the latch 312 is greater than the width of the slot 214, and after the latch 312 is inserted into the cavity 212, the latch 312 rotates by 90 °, so that the operating rod 310 can be clamped with the top block 210.

Wherein the stiffness of the operating rod 310 is greater than that of the elastic member 230 so that the operating rod 310 can support the elastic member 230, the bent elastic member 230 is substantially straightened to facilitate the insertion of the catheter 10 into the blood vessel. At the same time, the operating rod 310 has a certain elasticity and can be bent to allow the catheter 10 to be smoothly inserted into the blood vessel. That is, when the operating lever 310 itself can be bent and deformed, the straightening elastic member 230 can be supported. In this embodiment, the operation rod 310 may be an elastic metal rod, the elastic member 230 may be a metal tube, and a side wall of the metal tube is hollow, so that the operation rod 310 can be bent along the blood vessel while straightening the elastic member 230.

Referring to fig. 2 and 4, in one embodiment, two positioning blocks 350 are disposed on an end surface of the operation channel 16, an included angle formed between the two positioning blocks 350 is 90 degrees, and an indication rod 340 is disposed on the operation handle 320, and the indication rod 340 is disposed between the two positioning blocks 350. When the indication rod 340 is opposite to one of the positioning blocks 350, the latch 312 can pass through the latch groove 214, and when the indication rod 340 is opposite to the other positioning block 350, the latch 312 is abutted against the inner wall of the cavity 212, so that the top block 210 is clamped with the operating rod 310.

Furthermore, the side wall of the operating rod 310 is provided with a stop 314, the stop 314 is located on one side of the bottom block 220 away from the top block 210, the operating rod 310 is sleeved with a spring 330, and two ends of the spring 330 are respectively abutted against the bottom block 220 and the stop 314. When the latch 312 is engaged with the inner wall of the accommodating cavity 14, the spring 330 is in a compressed state. When the latch 312 is aligned with the latch groove 214, the lever 310 can move under the elastic force provided by the spring 330, so that the latch 312 is rapidly withdrawn from the latch groove 214. The side wall of the bottom block 220 far away from the top block 210 is provided with a positioning groove 224, and the end of the spring 330 is inserted into the positioning groove 224, so that the spring 330 is ensured to be stably installed.

Referring to fig. 1 to 8, the operating principle of the angiography catheter convenient to operate is as follows:

before the catheter 10 is inserted into the blood vessel, the bending part 120 is rotated to separate the bending part 120 from the main body 110, the operating rod 310 is passed through the bottom block 220, the latch 312 on the operating rod 310 is passed through the latch groove 214, then the operating rod 310 is rotated by the operating handle 320, when the indicating rod 340 is opposite to the latch 314, the latch groove 214 is latched with the inner wall of the accommodating cavity 14, at this time, the elastic member 230 is basically straightened, and the spring 330 is compressed. The bent portion 120 is fitted over the steering mechanism 20, and then the bent portion 120 is screwed to the body 110.

When the front end of the catheter 10 corresponds to the entrance of the target blood vessel, the catheter 10 is twisted according to the indication line on the catheter 10 so that the bending direction of the catheter 10 is directed toward the target blood vessel. Then, the operating lever 310 is rotated by the operating handle 320, when the indicating lever 340 is opposite to the other stopper 314, the latch 312 is opposite to the latch groove 214, the latch 312 is withdrawn out of the latch groove 214 by the elastic force provided by the spring 330, and then the operating lever 310 is taken out through the communication hole 222 of the bottom block 220 and the operating channel 16 in sequence. Meanwhile, the elastic member 230 is slowly bent and restored under the action of its own elastic force, so as to drive the catheter 10 to actively bend, and the catheter 10 is thereby actively bent and inserted into the target blood vessel. Finally, the connector 140 is connected to an angiography device for angiography.

When the entrance of the target vessel of the catheter 10 corresponds to the angiography catheter, the operating lever 310 is controlled by the operating handle 320, so that the operating lever 310 is separated from the top block 210, and the elastic member 230 is bent and restored, thereby driving the catheter 10 to be actively bent and inserted into the target vessel. In the process of inserting the radiography catheter, the catheter 10 is bent after being twisted and adjusted, so that the bent catheter is prevented from being twisted in a blood vessel, the operation difficulty is high, meanwhile, the catheter 10 does not need to be stretched forwards or pulled back, the inserting process is simple, the operation difficulty and time are reduced, and the operation is not influenced. Meanwhile, the steering mechanism 20 is easy to replace, can adapt to the conditions of different bending degrees, and has a wide application range.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. An angiographic catheter that facilitates manipulation, comprising:

2. The angiography catheter convenient to operate and control according to claim 1, wherein a clamping block is arranged at an end portion, far away from the operating handle, of the operating rod, the ejector block is provided with a cavity and a clamping groove communicated with the cavity, the clamping block can be inserted into the cavity through the clamping groove, and the clamping block is clamped with a side wall of the cavity through rotation.

3. The easy to manipulate angiographic catheter according to claim 2, wherein said clip is rectangular and said notch is a square slot, said clip having a length greater than the width of said notch.

4. The angiographic catheter of claim 2, wherein the end face of the operating channel has two positioning blocks, and the operating handle has an indicating rod located between the two positioning blocks.

5. The easy-to-handle angiographic catheter according to claim 1, wherein said catheter comprises a main body, a curved portion and a head portion, said curved portion being located between said main body and said head portion, said receiving cavity being located within said curved portion, said head portion being connected to said curved portion, said curved portion being detachably connected to said main body, said operating channel being open on said main body.

6. The conveniently operated angiographic catheter according to claim 5, wherein said body is formed with a boss at an end thereof, said boss having an outer wall provided with an external thread and an inner wall provided with an internal thread, said bend being in threaded connection with said boss.

7. The catheter of claim 5, wherein the end of the body distal from the bend is provided with a connector.

8. The angiographic catheter of claim 1, wherein a stop is disposed on a side wall of the operating rod, the stop is located on a side of the bottom block away from the top block, a spring is sleeved on the operating rod, and two ends of the spring are respectively abutted to the bottom block and the stop.

9. The easy-to-manipulate angiographic catheter according to claim 8, wherein the bottom block has a positioning slot formed in its side wall away from the top block, and the end of the spring is inserted into the positioning slot.

10. The easy-to-handle angiographic catheter according to claim 1, wherein said handle bar is a metal bar, said resilient member is a metal tube, and the side wall of said metal tube is hollowed out.