CN116115307B - Contrast guide wire device for controlling resistance - Google Patents
Contrast guide wire device for controlling resistance Download PDFInfo
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- CN116115307B CN116115307B CN202310100542.5A CN202310100542A CN116115307B CN 116115307 B CN116115307 B CN 116115307B CN 202310100542 A CN202310100542 A CN 202310100542A CN 116115307 B CN116115307 B CN 116115307B
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B17/3415—Trocars; Puncturing needles for introducing tubes or catheters, e.g. gastrostomy tubes, drain catheters
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B17/3417—Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating
- A61B17/3421—Cannulas
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/0102—Insertion or introduction using an inner stiffening member, e.g. stylet or push-rod
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/09—Guide wires
- A61M25/09041—Mechanisms for insertion of guide wires
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B2017/00743—Type of operation; Specification of treatment sites
- A61B2017/00778—Operations on blood vessels
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B2017/347—Locking means, e.g. for locking instrument in cannula
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2210/00—Anatomical parts of the body
- A61M2210/12—Blood circulatory system
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- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Animal Behavior & Ethology (AREA)
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- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
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- Gastroenterology & Hepatology (AREA)
- Media Introduction/Drainage Providing Device (AREA)
Abstract
The application discloses a contrast guide wire device for controlling resistance, which comprises a sheath tube, wherein a plurality of radial holes are formed in the inner wall of the sheath tube, an extrusion block is slidably arranged in the radial holes, the outer wall of the sheath tube is rotationally connected with a circular ring, a plurality of protruding parts are arranged on the circular ring, and in the rotation process of the circular ring, the protruding parts can extrude the extrusion block to radially slide. According to the device provided by the application, after the catheter enters the sheath, the doctor manually rotates the circular ring to drive the convex part on the circular ring to rotate, the convex part can squeeze the squeezing blocks, the squeezing blocks can move towards the interior of the sheath, and the squeezing blocks can move towards the interior of the sheath and squeeze the catheter in the sheath, so that the doctor can manually rotate the circular ring and adjust the circular ring to a position suitable for hand feeling of the doctor, the speed of the catheter entering a human body blood vessel can be better controlled, and the vascular rupture caused by the excessively high speed of the catheter in the human body blood vessel is avoided.
Description
Technical Field
The application relates to the technical field of medical equipment, in particular to a contrast guide wire device for controlling resistance.
Background
The function of the contrast guidewire catheter is to deliver contrast agents and therapeutic agents to the peripheral vasculature, coronary vasculature and vascular nervous system. Taking angiography as an example, in practical application, an arterial sheath is placed on an artery, then different catheters are selected through the arterial sheath, the artery to be displayed is accessed under the guidance of a guide wire, and finally, after the guide wire is drawn out, a contrast agent is injected through the catheters.
For example, the patent with the publication number of CN208893429U and the publication date of 2019, 05 month and 24 days is entitled "a radial artery full cerebral angiography catheter", which comprises an input tube, a diversion body, a connecting tube, a connecting port, an air guide bag, an air guide hose, an inner catheter, an outer sleeve, micropores and a metal woven mesh; the input pipe is arranged at one side of the bottom of the diversion body and is connected with the diversion body through a through way; a connecting port is arranged in the middle of the front part of the diversion body, and the diversion body is connected with the connecting port in a screwing way through a connecting pipe; an inner conduit is arranged in the middle of the front part of the connecting port, and the connecting port is connected with the inner conduit in a screwing way; the inner conduit is arranged in the middle of the inner part of the outer sleeve, and is connected with the outer sleeve in a sleeving manner; an air guide hose is arranged between the inner guide pipe and the inner part of the outer sleeve, and the inner guide pipe and the outer sleeve are connected with the air guide hose in an embedded mode; the air guide hose is arranged in the middle of the bottom of the air guide bag and is connected with the air guide bag through a through hole; a metal woven net is arranged in the pipe wall of the inner catheter, and the inner catheter is connected with the metal woven net in an adhesive mode; micropores are formed in one sides of the tops of the inner guide pipe and the outer sleeve, and the inner guide pipe and the outer sleeve are connected with the micropores through penetration. The application has high X-ray transmission linear energy by improving the structure and combining the prior art; the imaging device has the advantages of good imaging effect and high imaging performance, solves the problems and defects in the prior art, and has the purpose of practicability.
The disadvantages including the above patent are that in different radiography operations, the doctor needs to select catheters and guide wires with different diameters, and the catheters and guide wires can cause rupture of the blood vessel when entering the blood vessel of the human body through the sheath tube at too high speed, that is, the doctor feel of the different catheters and guide wires when entering the blood vessel of the human body is obviously different, so that the doctor is difficult to accurately grasp the speed of the catheters and guide wires when entering the blood vessel of the human body.
Disclosure of Invention
The object of the present application is to provide a contrast guidewire device with controlled resistance, which solves the above-mentioned drawbacks of the prior art.
In order to achieve the above object, the present application provides the following technical solutions:
the utility model provides a contrast guide wire device of control resistance, includes the sheath pipe and wears to locate the pipe of sheath pipe, be provided with a plurality of radial holes on the sheath pipe inner wall, radial downthehole slip is provided with the extrusion piece, the outer wall rotation of sheath pipe is connected with the ring, be provided with a plurality of bellying on the ring, the rotation in-process of ring, the bellying can extrude the extrusion piece carries out radial slip.
The contrast guide wire device is characterized in that the extrusion block comprises an extrusion end and a driving end, the end face of the driving end is an inclined plane, and the end face of the extrusion end is an arc surface.
In the contrast guide wire device, the outer wall of the sheath tube is provided with the annular groove, and the annular ring is rotatably arranged in the annular groove.
The contrast guide wire device is characterized in that a chute is further formed in the annular groove, a limiting rod is arranged at the bottom end of the extrusion block, a spring is arranged in the chute, one end of the spring is connected with the chute, the other end of the chute is connected with a protruding portion, and the limiting rod moves radially in the chute.
In the contrast guide wire device, the radial holes have the same spacing, and the protruding parts have the same spacing.
In the contrast guide wire device, the protruding portion is an annular protruding portion, and the annular surface of the annular protruding portion is attached to the outer wall of the sheath tube.
In the contrast guide wire device, the protruding portion and the extrusion block are made of hard materials.
According to the contrast guide wire device, the groove bodies are arranged on two sides of the radial hole, the elastic pieces are arranged in the groove bodies, one end of each elastic piece is connected with the sheath tube, and the other end of each elastic piece is connected with the extrusion block.
In the contrast guide wire device, four protruding portions are arranged on the circular ring.
According to the contrast guide wire device, the concave portions are arranged on the circular ring and correspond to the convex portions one by one.
In the technical scheme, after the catheter enters the sheath tube, the doctor manually rotates the circular ring, the circular ring rotates to drive the protruding part on the circular ring to rotate, the protruding part can squeeze the squeezing blocks in the radial holes in the rotating process, the squeezing blocks can move towards the inside of the sheath tube due to the squeezing force, the squeezing blocks are squeezed by the protruding parts, the squeezing blocks can move towards the inside of the sheath tube and can squeeze the catheter and the guide wire in the sheath tube, the doctor can manually rotate the circular ring and adjust the circular ring to a position suitable for hand feeling, so that the squeezing blocks squeeze the catheter through the protruding parts, the resistance of the catheter and the guide wire when entering the human blood vessel is controlled by the squeezing blocks, the doctor can better control the speed of the catheter and the guide wire when entering the human blood vessel, and vascular rupture caused by the fact that the speed of the catheter and the guide wire is too high in the human blood vessel is avoided.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments described in the present application, and other drawings may be obtained according to these drawings for a person having ordinary skill in the art.
FIG. 1 is a schematic diagram of a contrast guidewire device for controlling resistance provided by an embodiment of the present application;
FIG. 2 is a partial top view of a drag-controlled contrast guidewire device provided in an embodiment of the present application;
FIG. 3 is a partial top view of a drag-controlled contrast guidewire device provided by another embodiment of the application;
FIG. 4 is a partial top view of a drag-controlled contrast guidewire device provided in an embodiment of the present application;
fig. 5 is a cross-sectional view of a drag-controlled contrast guidewire device provided in another embodiment of the application.
Reference numerals illustrate:
1. a sheath; 2. extruding a block; 3. a circular ring; 4. a boss; 5. a recessed portion; 6. an elastic member; 7. a chute; 8. a limit rod; 8.1, a necking part; 9. a spring; 10. an annular groove; 11. a micro-protrusion; 12. a straight rod.
Detailed Description
In order to make the technical scheme of the present application better understood by those skilled in the art, the present application will be further described in detail with reference to the accompanying drawings.
In various embodiments of the present application, "proximal" and "distal" are relative orientations, relative positions, directions of elements or actions relative to one another from the perspective of a physician using the medical device, although "proximal" and "distal" are not intended to be limiting, and "proximal" generally refers to an end of the medical device that is proximal to the physician during normal operation, and "distal" generally refers to an end that is distal from the physician that first enters the patient.
As shown in fig. 1-5, the contrast guidewire device for controlling resistance provided by the embodiment of the application comprises a sheath tube 1, wherein a plurality of radial holes are formed in the inner wall of the sheath tube 1, an extrusion block 2 is slidably arranged in the radial holes, a circular ring 3 is rotatably connected to the outer wall of the sheath tube 1, a plurality of protruding parts 4 are arranged on the circular ring 3, and in the rotating process of the circular ring 3, the protruding parts 4 can extrude the extrusion block 2 to radially slide.
Specifically, as shown in fig. 1, the distal end of the sheath tube 1 (i.e., the end that enters the human body) is used for being placed into an artery, the proximal end of the sheath tube 1 is located outside the body, the catheter and/or the guide wire enters the blood vessel of the human body through the sheath tube 1, a plurality of radial holes are formed in the inner wall of the proximal end of the sheath tube 1 (i.e., the end far away from the patient), preferably, six radial holes are formed, the radial holes are uniformly spaced, i.e., the radial holes are spaced at 60 degrees, an extrusion block 2 is slidably formed in the inner wall of each radial hole, one end of the extrusion block 2 is located inside the sheath tube 1, the end is an extrusion end, the extrusion end is used for extruding the catheter and the guide wire, the other surface of the extrusion block 2 extends to the outer wall surface of the sheath tube 1 through the radial end, the end is a driving end, and the driving end is used for receiving extrusion to drive the extrusion block 2 to slide radially, so that an inclined surface is formed in the driving end, preferably, two circumferential sides of the driving end are respectively provided with an inclined surface to receive extrusion driving. Simultaneously, be provided with ring channel 10 on the sheath pipe, the opposite side of extrusion piece 2 is located the protrusion in ring channel 10, rotates on the outer wall of sheath pipe 1 and is provided with ring 3, ring 3 can rotate in ring channel 10, and ring 3's shape can make the drive end of bellying 4 contact and extrusion piece 2 when rotating along sheath pipe 1 outer wall, because extrusion piece 2 slides and sets up in radial hole, extrusion piece 2 can move towards sheath pipe 1 inside so that the finger centre gripping rotates, be provided with a plurality of bellying 4 on the inside wall of ring 3, the material of bellying 4 is hard material, preferential bellying 4 is hemispherical bellying 4, under initial condition, the hemispherical face of bellying 4 can contact on the outer wall of sheath pipe 1, preferably, six bellying 4 also be at every bellying 4 interval 60 degrees, can make bellying 4 contact and extrusion piece 2's drive end because extrusion piece 2 slides and set up in radial hole, extrusion piece 2 can move towards sheath pipe 1 inside, begin to rotate ring 3 after the pipe entering sheath pipe 1, ring 3 rotates bellying 4, the bellying 4 can make extrusion piece 2 make the extrusion piece 2 different diameter of extrusion piece 2 make the same extrusion piece 2 make the diameter of extrusion piece 2 different extrusion piece 2 when the same diameter of extrusion piece 2 and the extrusion piece 2 is different from the diameter of extrusion piece 2.
According to the contrast guide wire device for controlling resistance, after a catheter enters the sheath tube 1, a doctor manually rotates the circular ring 3, the circular ring 3 rotates to drive the protruding part 4 on the circular ring 3 to rotate, the protruding part 4 can squeeze the squeezing block 2 in the radial hole in the rotating process, the squeezing block 2 can move towards the inside of the sheath tube 1 when being subjected to squeezing force, the plurality of protruding parts 4 squeeze the plurality of squeezing blocks 2, at the moment, the plurality of squeezing blocks 2 can move towards the inside of the sheath tube 1 and can squeeze the catheter in the sheath tube 1, the doctor can manually rotate the circular ring 3 and adjust the circular ring to a position suitable for the hand feeling of the doctor, so that the squeezing block 2 squeezes the catheter through the protruding parts 4 to control the resistance when the catheter enters the human blood vessel, the doctor can better control the speed of the catheter when entering the human blood vessel, and vascular rupture caused by the fact that the speed of the catheter in the human blood vessel is too fast is avoided.
In another embodiment provided by the application, as shown in fig. 3, preferably, the whole end surface of the driving end which receives extrusion is an inclined surface, the end surface of the driving end is an arc surface adapting to the shape of the catheter, the proximal end of the sheath tube 1 is preferably provided with four radial holes, the four radial holes are all internally provided with extrusion blocks 2, the circular ring 3 is provided with four protruding parts 4, when the protruding parts 4 pass through the inclined surface of the extrusion blocks 2, the extrusion blocks 2 can be extruded by the protruding parts 4 so that the extrusion blocks 2 move towards the inside of the sheath tube 1, when the protruding parts 4 extrude the inclined surface of the extrusion blocks 2, as the surface extruded by the protruding parts 4 is the inclined surface, the extrusion blocks 2 can be extruded inwards gradually, namely, the radial dimension of the arc surface of the extrusion blocks 2 is different, and the radial dimension of the catheter in the extrusion blocks 2 can be adjusted relatively accurately.
In still another embodiment of the present application, in order to achieve the resetting of the extrusion block 2, an elastic member such as a spring is configured for the extrusion block 2 in the most common embodiment, as shown in fig. 4, for the extrusion block 2 having two inclined planes, two axial side walls of the radial hole are provided with grooves, elastic members 6 are further disposed in the grooves, two sides of the extrusion block 2 are respectively provided with an elastic member 6, one end of the elastic member 6 is connected to the inner wall of the sheath 1, and the other end of the elastic member 6 is connected to the extrusion block 2, so that after the extrusion block 2 is extruded by the protrusion 4 toward the inside of the sheath 1, the extrusion block 2 will pull to elongate the elastic member 6, and after the protrusion 4 leaves the extrusion block 2, the elastic member 6 will reset to the initial state, so that the elastic member 6 is disposed to enable the extrusion block 2 to recover to the original position after the protrusion 4 extrudes the block 2.
In still another embodiment provided by the application, as shown in fig. 5, for the extrusion block 2 with only one inclined surface, the outer wall of the circular ring 3 is provided with the concave parts 5, the concave parts are used for pressing fingers when a doctor operates, the concave parts 5 are in radial one-to-one correspondence with the convex parts 4, meanwhile, the circular ring 3 is provided with through holes, the through holes are internally provided with straight rods 12 penetrating through the convex parts 4 and the concave parts 5 in a sliding manner, one end of each straight rod 12 is positioned at the top point of the convex part 4, the other end of each straight rod 12 is positioned at the concave low point of the concave part, in addition, the extrusion block 2 is provided with micro-convex parts 11 on the top area (the area farthest from the central axis of the sheath tube 1) of the inclined surface, and the micro-convex parts 11 enter the through holes to extrude the straight rods 12 at the moment when the circular ring 3 rotates to the top area of the extrusion block, and the straight rods 12 are enabled to move radially in the circular ring 3, at the moment, the straight rods 12 can give a remarkable extrusion feeling to the doctor's fingers, or observe other non-pressed concave parts 5 (at least two concave parts 5 are arranged in the through holes, as long as two straight rods 5 are rotated, the two straight rods) and the end parts of the straight rods 12 reach the maximum positions of the maximum extrusion surface, and the maximum extrusion resistance can be further increased to reach the maximum, and the maximum rotation resistance can be reached to the side of the straight rods, and the catheter can be further improved, and the warning that the maximum impact can be reached. The other effect is that the doctor can release the ring 3 at this time, and the micro-protrusion 11 at one end of the through hole has a passive locking effect, and can be locked at the position of the maximum size without a separate locking mechanism.
In this embodiment, an operator holds the concave portion 5 with his hands when rotating the ring 3, and the concave portion 5 also corresponds to the convex portion 4, a stop lever 8 is disposed on the end face of the extrusion block 2 facing the distal end or the proximal end, a chute 7 is further disposed on the wall of the radial hole, the stop lever 8 is slidably connected in the chute 7, a spring 9 is disposed in the chute 7, one end of the spring 9 is connected with the stop lever 8, the other end of the spring 9 is connected with the wall of the chute 7, the stop lever 8 slides radially in the chute 7 synchronously when the extrusion block 2 slides radially, the ring 3 rotates to drive the convex portion 4 to move circumferentially, the convex portion 4 moves on the inclined surface to drive the extrusion block 2 to move toward the sheath tube 1, the extrusion block 2 moves to drive the stop lever 8 to move, in this embodiment, in terms of size design, when the convex portion 4 moves to the top end of the inclined surface, the limiting rod 8 moves to the side wall of the abutting sliding groove 7 (if the scheme is overlapped with the embodiment of the straight rod 12, at the moment, the right micro-convex part 11 enters the through hole to abut against the straight rod 12), the position is called the maximum position, the limiting rod 8 limits the movement of the extrusion block 2, at the moment, the extrusion block 2 can not move towards the inside of the sheath tube 1, so that the concave part 5 has obvious hand feeling that the convex part 4 rotates to the top end of the inclined surface of the extrusion block 2, at the moment, a doctor feels obvious resistance at the concave part 5 when the doctor wants to rotate the circular ring 3, the doctor can reset to the initial position after rotating the convex part 4 on the circular ring 3 to pass the inclined surface under the action of the spring 9, the spring 9 can pull the limiting rod 8 to move, the limiting rod 8 drives the extrusion block 2 to move towards the outside of the sheath tube 1, and the reset of the extrusion block 2 is realized.
In a further embodiment, as a one-time use guarantee design, the limit lever 8 is provided with a necking part 8.1, two sides of the limit lever 8, which are positioned at the necking part 8.1, are respectively provided with a first section and a second section, the first section is connected to the central hole of the sheath tube 1, the second section is a section far away from the extrusion block 2, the spring 9 is connected to the second section, in the maximum position, the necking part 8.1 is attached to the side wall of the chute 7 and is positioned in the notch area of the chute 7, after each use, the doctor rotates the circular ring 3 to the maximum position and forcibly rotates, at the moment, the limit lever 8 is forced to break from the necking part 8.1 due to the thinness and the necking part 8.1, and the limit lever 8 has a certain elasticity, after breaking, the first section slides out from the chute 7 to enter the central hole of the sheath tube 1, on the one hand, the extrusion block 2 cannot be used for the second time, the extrusion block 2 is forced to enter the chute 7, the spring 9 is forced to be connected with the extrusion block 2, and the sliding guide wire cannot be adjusted repeatedly.
In another embodiment provided by the application, the end face of the ring 3 facing the proximal end is provided with a tooth-shaped part, and the side wall of the annular groove 10 near the proximal end is also provided with a tooth-shaped part, so that when a doctor wants to stop at a certain position, the doctor can slightly pull the ring 3 towards the proximal end, so that the two tooth-shaped parts are matched to play a certain locking role, the distance can be small, less than about 0.5mm, namely, the ring is moved towards the distal end a little when rotating, and is moved towards the proximal end a little when locking, the manual rotation removal of the ring 3 is not influenced, and the probability of self rotation of the ring can be only reduced.
While certain exemplary embodiments of the present application have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that modifications may be made to the described embodiments in various different ways without departing from the spirit and scope of the application. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive of the scope of the application, which is defined by the appended claims.
Claims (5)
1. The utility model provides a contrast guide wire device for controlling resistance, includes the sheath, its characterized in that, be provided with a plurality of radial holes on the sheath inner wall, radial downthehole slip is provided with the extrusion piece, the outer wall of sheath rotates and is connected with the ring, be provided with a plurality of bellying on the ring, the rotation in-process of ring, the bellying can extrude the extrusion piece carries out radial slip, the extrusion piece includes extrusion end and drive end, the terminal surface of drive end is the inclined plane, the terminal surface of extrusion end is the arcwall, be provided with the ring channel on the sheath outer wall, the ring rotates and sets up in the ring channel, still be provided with the spout on the ring channel, be provided with the depressed part on the outer wall of ring, the depressed part is used for the finger to press when doctor's operation, a plurality of depressed parts and a plurality of bellying are radial one-to-one, are provided with the through-hole on the ring, the through hole is internally provided with a straight rod penetrating through the bulge and the concave part in a sliding way, one end of the straight rod is positioned at the top point of the bulge, the other end of the straight rod is positioned at the concave low point of the concave part, the extrusion block is provided with a micro-convex part on the top area of the inclined surface of the extrusion block, the bottom end of the extrusion block is provided with a limiting rod, the inside of the chute is provided with a spring, the limiting rod radially moves in the chute and is provided with a shrinking neck, two sides of the limiting rod positioned on the shrinking neck are respectively provided with a first section and a second section, the first section is connected with the extrusion block, the second section is far away from the extrusion block, the spring is connected with the second section, the necking part is attached to the side wall of the chute and is positioned in the notch area of the chute, when the bulge moves to the top end of the inclined surface, the limiting rod just moves to the side wall of the abutting chute, and at the moment, the micro-convex part enters the through hole to abut against the straight rod, this position is called the maximum position.
2. The contrast guidewire device of claim 1, wherein the radial holes are uniformly spaced apart and the bosses are uniformly spaced apart.
3. The contrast guidewire device of claim 1, wherein the boss is an annular boss with an annular face that conforms to an outer wall of the sheath.
4. The contrast guidewire device of claim 1, wherein the boss and the extrusion are hard materials.
5. The contrast guidewire device of claim 1, wherein four of the bosses are disposed on the annular ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310100542.5A CN116115307B (en) | 2023-02-10 | 2023-02-10 | Contrast guide wire device for controlling resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310100542.5A CN116115307B (en) | 2023-02-10 | 2023-02-10 | Contrast guide wire device for controlling resistance |
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| CN116115307A CN116115307A (en) | 2023-05-16 |
| CN116115307B true CN116115307B (en) | 2023-09-22 |
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| CN202310100542.5A Active CN116115307B (en) | 2023-02-10 | 2023-02-10 | Contrast guide wire device for controlling resistance |
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