Guidewire twisting device and guide device

Abstract

The present application relates to a guide wire twisting device for pushing or withdrawing a guide wire, comprising a body and a cap, wherein the cap is inserted into the body at least partially, and an inner cavity and a through hole are arranged in the body axially and communicate with each other, and a plurality of protrusions are arranged on the circumferential inner wall of the inner cavity for fixing the guide wire from the circumferential and axial directions after a part of the guide wire is inserted into the inner cavity. The present application also provides a guide device comprising the guide wire twisting device and the guide wire inserted into the guide wire twisting device. The present application can provide good hand feeling and operability in the implantation of a cardiac pacemaker, and is beneficial to efficiently push or withdraw the guide wire to a target position.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of medical devices, in particular to a guide wire twisting device and guide device used in interventional therapy. BACKGROUND

[0002] Cardiac pacemaker implantation is a treatment method that uses artificial implantation of a cardiac pacemaker to stimulate the heart with a specific frequency of pulse current through a lead and electrode to replace the pacemaker of the heart to drive the heart to beat. It is a safe and effective method for irreversible cardiac pacing and conduction dysfunction diseases caused by various reasons, and is particularly effective for the treatment of severe chronic arrhythmia. Since the first cardiac pacemaker was implanted in the human body in 1958, pacemaker manufacturing technology and process have developed rapidly, and the function has become increasingly perfect. While pacemakers have successfully treated bradyarrhythmia and saved the lives of thousands of patients, pacemakers have also been applied to tachyarrhythmia and non-electricity diseases, such as preventing paroxysmal atrial tachyarrhythmia, carotid sinus syncope, and dual-chamber synchronous treatment of drug-refractory congestive heart failure. Pacemaker surgery has the characteristics of small incision, no pain, no thoracotomy, and safety and reliability. Installing a pacemaker not only reduces and avoids the occurrence of cardiac events (syncope, heart failure, sudden death), but also improves the quality of life of patients with arrhythmia.

[0003] An artificial cardiac pacing system mainly includes two parts: a pulse generator and an electrode lead. The surgical process is to insert the electrode lead from the vein under the arm or clavicle, under X-ray perspective, to insert it into the predetermined cardiac pacing position, fix and detect it, and then bury the pacemaker connected with the electrode lead in the chest, suture the skin, and the surgery is completed. During the process of sending the electrode lead into the human body, the electrode lead is soft and cannot directly reach the required position, so it needs to be fixed and guided by a guide wire. The guide wire needs to be rotated and pushed to pass through the blood vessels and find a suitable lead fixing point. Since the guide wire is thin, it is not convenient to operate manually, so a guide wire twist is installed at the tail end of the guide wire to increase the operability and practicality. The existing guide wire twist is small in size and smooth in surface, which makes it difficult for doctors to feel and easy to slip out of their hands during surgery, increasing the difficulty and risk of surgery. In addition, the guide wire twist is usually fixed by gluing when assembled with the guide wire, which is time-consuming and laborious and increases the cost. SUMMARY

[0004] The purpose of the present application is to provide a guide wire twisting device that can provide good hand feeling and operability in cardiac pacemaker implantation surgery to solve the problems of damaging blood vessels, difficulty in reaching the target position, and difficulty in positioning and fixing caused by difficult control of the guide wire.

[0005] In order to achieve the above object, the present application provides a guide wire twisting device for pushing or withdrawing a guide wire, characterized in that the device comprises a body and a cap, the cap is inserted into the body at least partially, an inner cavity and a through hole are arranged in the body axially and communicate with each other, a plurality of protrusions are arranged on the circumferential inner wall of the inner cavity, and the protrusions are used to fix the guide wire from the circumferential direction and the axial direction after a part of the guide wire is inserted into the inner cavity.

[0006] Optionally, the part of the guide wire inserted into the inner cavity is clamped into a groove formed by two adjacent protrusions.

[0007] Optionally, the protrusions are a plurality of ribs parallel to the axis of the inner cavity and / or a plurality of continuous protrusions.

[0008] Optionally, the part of the guide wire inserted into the inner cavity is shaped as a curved shape.

[0009] Optionally, the cap and the body are detachably connected.

[0010] Optionally, the diameter of the inner cavity is larger than the diameter of the through hole.

[0011] Optionally, the body comprises a front end and a rear end, the through hole is arranged in the front end, the inner cavity is arranged in the rear end, and the front end is a hexagonal pyramid and the rear end is a hexagonal prism.

[0012] Optionally, the outer surface of the rear end of the body has a frosted texture.

[0013] Optionally, the cap comprises a cap body and a plug, the diameter of the cap body is larger than the diameter of the plug, the cap body is exposed outside the inner cavity when the plug is clamped into the inner cavity, and the plug is inserted into the inner cavity until the end of the guide wire is contacted.

[0014] Optionally, an identification for displaying the length of the guide wire is arranged on the side of the cap body away from the plug.

[0015] Optionally, the difference between the diameter of the through hole and the diameter of the guide wire is less than or equal to 0.1 mm.

[0016] Optionally, the length of the guide wire twisting device is between 18 mm and 22 mm, and the diameter of the body is between 5 mm and 7 mm.

[0017] The present application also provides a guide device comprising the guide wire twisting device and the guide wire as described above, the cap of the guide wire twisting device is inserted into the inner cavity until the end of the guide wire is contacted, and the plurality of protrusions in the inner cavity fix the guide wire from the circumferential direction and the axial direction.

[0018] This invention inserts at least a portion of the cap into the body of the rod, and provides multiple protrusions on the circumferential inner wall of the inner cavity. These protrusions are used to fix the guidewire circumferentially and axially after a portion of the guidewire is inserted into the inner cavity through the through-hole, thus constraining the guidewire's autonomous rotation and axial movement and increasing its torsional control. Furthermore, the portion of the guidewire inserted into the inner cavity is shaped into a curved form, changing the traditional method of fixing the guidewire with glue, saving time, effort, and costs. The frosted texture on the body increases surface friction and prevents slippage. The separate design of the body and cap allows the operator to easily modify the length of the guidewire, increasing its usability. The assembled length of the guidewire torsion device conforms to ergonomics, reducing the possibility of slippage. Attached Figure Description

[0019] Figure 1 This is a cross-sectional view of the guide wire torsion device provided in an embodiment of the present invention;

[0020] Figure 2 A cross-sectional view of the pole provided in an embodiment of the present invention;

[0021] Figure 3 A schematic diagram of a cap provided in an embodiment of the present invention;

[0022] Figure 4a Schematic diagram of the external structure of the guide wire torsion device provided in the embodiment of the present invention Figure 1 ;

[0023] Figure 4b Schematic diagram of the external structure of the guide wire torsion device provided in the embodiment of the present invention Figure 2 ;

[0024] In the diagram: 10-body; 11-front end; 12-rear end; 13-through hole; 14-inner cavity; 15-protrusion; 16a-frosted pattern; 16b-frosted stripe; 20-cap; 21-cap body; 211-marker; 22-pin; 30-guide wire. Detailed Implementation

[0025] The specific embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. The advantages and features of the present invention will become clearer from the following description. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the present invention.

[0026] like Figure 1As shown, a guide wire twisting device for pushing or withdrawing a guide wire 30 comprises a body 10 and a cap 20, the cap 20 is inserted into the body 10 at least partially, the body 10 is provided with an inner cavity 14 and a through hole 13 which are communicated with each other in axial direction, a plurality of protrusions 15 are arranged on the circumferential inner wall of the inner cavity 14, a part of the guide wire 30 is inserted into the inner cavity 14 from the through hole 13, and the part of the guide wire 30 inserted into the inner cavity 14 is clamped into the groove formed by two adjacent protrusions 15, so that the protrusions 15 can constrain the movement of the part of the guide wire 30 inserted into the inner cavity 14 in circumferential and axial directions.

[0027] Specifically, the axis of the through hole 13 is coaxial with the axis of the body 10, the through hole 13 is communicated with the inner cavity 14, the cap 20 is inserted into the inner cavity 14 of the body 10 at least partially, and the cap 20 is detachably connected with the body 10 in the way of pin insertion, the proximal end (the end close to the operator) of the guide wire 30 is inserted into the inner cavity 14 from the through hole 13, the diameter of the inner cavity 14 is larger than that of the through hole 13, so that the guide wire is fixed by being extruded by the cap 20.

[0028] Further, referring to Figure 2 , the circumferential inner wall of the inner cavity 14 is provided with a plurality of protrusions 15, and the part of the guide wire 30 inserted into the inner cavity 14 is clamped into the groove formed by two adjacent protrusions 15. Specifically, the protrusions 15 extend from the end of the inner cavity 14 close to the through hole 13 to the end away from the through hole 13, the protrusions 15 are a plurality of convex edges parallel to the axis of the inner cavity 14 and / or a plurality of groups of continuous convex points, the convex edges or continuous convex points are arranged circumferentially at intervals. And the convex edges or continuous convex points protrude towards the center of the inner cavity 14 in the radial direction of the inner cavity 14, preferably, the number of convex edges or the number of groups of continuous convex points is 4 or 4 groups, and they are arranged uniformly along the circumferential inner wall of the inner cavity 14. The plurality of groups of continuous convex points each includes a plurality of convex points arranged on the same straight line. The number of convex edges or the number of groups of continuous convex points should not be too many, so as not to cause the guide wire 30 to be stuck when being withdrawn from the inner cavity 14 of the body 10.

[0029] Further, the guide wire 30 inserted into the inner cavity 14 is shaped as a curve, such as an arch or a horseshoe. Specifically, after the proximal end of the guide wire 30 is inserted into the inner cavity 14 from the through hole 13, the portion of the guide wire 30 inserted into the inner cavity 14 is shaped as an arch or a horseshoe. The guide wire 30 shaped as a curve can more effectively enable the protrusion 15 to restrict the circumferential movement of the portion of the guide wire 30 inserted into the inner cavity 14, and the guide wire 30 shaped as a curve is further restricted in the axial movement by the radial inner wall of the inner cavity 14 at the position where the inner cavity 14 communicates with the through hole 13.

[0030] Further, the body rod 10 includes a front end portion 11 and a rear end portion 12, the through hole 13 is located in the front end portion 11, the inner cavity 14 is located in the rear end portion 12, and the front end portion 11 is a hexagonal pyramid and the rear end portion 12 is a hexagonal prism. Specifically, the body rod 10 is integrally formed in the shape of a hexagonal prism, the front end portion 11 is a pyramid, and the rear end portion 12 is a cylinder, which facilitates the operator to hold and enhances the operability.

[0031] Further, the outer surface of the rear end portion 12 of the body rod 10 has a frosted texture. Specifically, referring to Figure 4a and Figure 4b , the rear end portion 12 is provided with a frosted pattern 16a or a frosted stripe 16b between the end close to the front end portion 11 and the tail of the rear end portion 12, and the pattern of the frosted pattern 16a or the frosted stripe 16b is not limited as long as it can increase the friction. By providing the frosted texture, the friction when the operator holds the body rod 10 can be increased, so that it is not easy to slip, and the operability is improved.

[0032] Further, referring to Figure 1 , the cap 20 includes an integrally formed cap body 21 and a latch 22, the diameter of the cap body 21 is greater than the diameter of the latch 22, and when the latch 22 is inserted into the inner cavity 14 of the body rod 10, the cap body 21 is exposed outside the inner cavity 14, and the latch 22 is inserted into the inner cavity 14 until it contacts the end of the guide wire 30. Specifically, the latch 22 is perpendicular to the cap body 21 and is in the shape of a "T", the latch 22 is inserted into the inner cavity 14 to close the rear end portion 12 of the body rod 10.

[0033] The proximal end of the guide wire 30 is inserted into the inner cavity 14 from the through hole 13, and is then shaped into a curved shape (e.g. an arc or a horseshoe shape) so as to be engaged with the protrusions 15 on the inner cavity 14. The arc or horseshoe shape of the guide wire 30 is constrained by the protrusions 15, thereby preventing the proximal end of the guide wire 30 from rotating circumferentially in the inner cavity 14. The plug 22 is then inserted into the inner cavity 14 of the body rod 10, and is in contact with the proximal end of the guide wire 30 to constrain the movement of the guide wire 30 in the axial direction. Specifically, the distal end (the end away from the operator) of the plug 22 is in contact with the proximal end (the end close to the operator) of the guide wire 30, and the plug 22 presses the guide wire 30. The two ends of the arc or horseshoe shape of the guide wire 30 are respectively constrained by the plug 22 and the radial inner wall of the inner cavity 14 at the position where the inner cavity 14 communicates with the through hole 13, so that the guide wire 30 is constrained in the inner cavity 14 and cannot move in the axial direction. Furthermore, the guide wire 30 is prevented from rotating autonomously by being clamped in the groove formed by two adjacent protrusions 15, thereby enhancing the control of the guide wire 30. In this way, the guide wire 30 can be fixed in the inner cavity 14.

[0034] Further, referring to Figure 3 , the cap 21 is provided with markings for displaying the length of the guide wire on the side away from the plug 22. Specifically, one side of the cap 21 of the cap 20 is connected to the plug 22, and the other side of the cap 21 is provided with different markings 211, which can represent different lengths or different types of guide wires 30 for differentiation.

[0035] In addition, the color of the cap 20 adopts a medical-grade color master, which has various colors corresponding to different types of guide wires 30. The color master is a new type of coloring agent for special high polymer materials, also known as pigment preparation. The color master is mainly used on plastics and is composed of three basic elements: pigment or dye, carrier and additive. It is a super-constant pigment uniformly attached to the resin to form an aggregate.

[0036] Further, the difference between the diameter of the through hole 13 and the diameter of the guide wire 30 is less than or equal to 0.1 mm. Specifically, in the present embodiment, the diameter of the through hole 13 is slightly larger than the diameter of the guide wire, but does not exceed 0.1 mm. Since the diameter of the through hole 13 is slightly larger than the diameter of the guide wire, the through hole 13 can further constrain the movement range of the guide wire 30 in the axial direction.

[0037] Further, the length of the guide wire twisting device is between 18mm-22mm, and the diameter of the body rod is between 5mm-7mm. Preferably, in the embodiment, the total length of the body rod 10 and the cap 20 is 20mm, and the diameter of the body rod is 6mm. The total length of the body rod 10 and the cap 20 is designed in combination with ergonomics, which is close to the size of the distal phalanx of the operator, and the diameter of the body rod 10 can make the guide wire twisting device easier to control without slipping out of the hand, reducing the possibility of the doctor's hand slipping out during the operation, and greatly improving the operability.

[0038] Further, the materials of the body rod 10 and the cap 20 are both medical-grade polypropylene. Polypropylene has excellent mechanical properties, good bending fatigue resistance, heat resistance (the product can be sterilized at a temperature of 100℃ or above, and will not deform at 150℃ without external force), chemical stability (except for concentrated sulfuric acid and concentrated nitric acid, it is relatively stable to other chemical reagents) and excellent high-frequency insulation performance. The forming process of polypropylene material is simple and widely used in medical devices, biological pharmaceutical industry, etc.

[0039] The body rod 10 and the cap 20 are designed in a detachable and separated manner, so that when the operator feels that the length of the guide wire 30 is too long to operate, the cap 20 can be removed, the guide wire 30 can be extracted and the excess part can be cut off, and then the guide wire 30 can be re-shaped and loaded into the inner cavity 14 of the body rod 10 for continuous use, thereby expanding the use range of the same guide wire 30.

[0040] During operation, the operator assembles and fixes the guide wire 30 with the guide wire twisting device, holds the body rod 10 of the guide wire twisting device, and pushes, twists or withdraws the guide wire 30 according to the actual needs.

[0041] The application also provides a guide device, which comprises the guide wire twisting device and the guide wire 30, the cap 20 of the guide wire twisting device is inserted into the inner cavity 14 until contacting the end of the guide wire 30, and the plurality of protrusions 15 in the inner cavity 14 fix the guide wire 30 from the circumferential direction and the axial direction.

[0042] In summary, in the guide wire twisting device and guide device provided by the embodiment of the present application, by inserting the cap into the body rod at least in part, and arranging a plurality of protrusions on the circumferential inner wall of the inner cavity, the guide wire is fixed from the circumferential and axial directions after a part of the guide wire is inserted into the inner cavity from the through hole, the independent rotation and axial movement of the guide wire are constrained, and the twist control property is increased; further, the part of the guide wire inserted into the inner cavity is shaped as a curved shape, the traditional guide wire fixing method by gluing is changed, time and labor are saved, and cost is saved. By arranging the frosted texture on the body rod, the surface friction is increased, and slipping is avoided; the separate design of the body rod and the cap is adopted, the length of the guide wire is easily modified by the operator, and the use range is increased; the length of the assembled guide wire twisting device conforms to ergonomics, the possibility of dropping is reduced, the operability of the guide wire twisting device is greatly improved, and the guide wire is efficiently pushed to the target position or withdrawn.

[0043] The above is only the preferred embodiment of the present application, and does not limit the present application in any way. Any person skilled in the art can make any equivalent replacement, modification or change of the technical scheme and technical content disclosed by the present application without departing from the scope of the technical scheme of the present application, and the content still belongs to the protection scope of the present application.

Claims

1. A guide wire torsion device for pushing or retracting a guide wire, characterized in that, The device includes a body and a cap. At least a portion of the cap is inserted into the body. The body has an axially connected inner cavity and a through hole. The inner wall of the inner cavity has multiple protrusions for fixing the guidewire circumferentially and axially after a portion of the guidewire is inserted into the inner cavity. The portion of the guidewire inserted into the inner cavity is shaped into a curved shape. The protrusions extend from one end of the inner cavity near the through hole to the end away from the through hole. The protrusions are spaced apart circumferentially. The portion of the guide wire inserted into the inner cavity is engaged in the groove formed by two adjacent protrusions. The cap includes a pin that is inserted into the inner cavity until it contacts the end of the guide wire. The two ends of the curved portion of the guide wire are constrained by the pin and the radial inner wall of the inner cavity where it communicates with the through hole, thereby confining the guide wire within the inner cavity.

2. The guide wire torsion device as described in claim 1, characterized in that, The protrusion is a plurality of convex ridges and / or a plurality of continuous protrusions parallel to the axis of the inner cavity.

3. The guide wire torsion device as described in claim 1, characterized in that, The cap is detachably connected to the body.

4. The guide wire torsion device as described in claim 1, characterized in that, The diameter of the inner cavity is larger than the diameter of the through hole.

5. The guide wire torsion device as described in claim 1, characterized in that, The shaft includes a front end and a rear end, the through hole is located in the front end, the inner cavity is located in the rear end, and the front end is a hexagonal pyramid and the rear end is a hexagonal prism.

6. The guide wire torsion device as described in claim 5, characterized in that, The outer surface of the rear end of the shaft has a frosted texture.

7. The guide wire torsion device as described in claim 1, characterized in that, The cap includes a cap body, the diameter of which is larger than the diameter of the pin, and the cap body protrudes outside the inner cavity when the pin is inserted into the inner cavity.

8. The guide wire torsion device as described in claim 7, characterized in that, The cap body has a marking on the side opposite to the pin to indicate the length of the guide wire.

9. The guide wire torsion device as described in claim 1, characterized in that, The difference between the diameter of the through hole and the diameter of the guide wire is less than or equal to 0.1 mm.

10. The guide wire torsion device as described in claim 1, characterized in that, The length of the guide wire torsion device is between 18mm and 22mm, and the diameter of the rod is between 5mm and 7mm.

11. A guiding device, characterized in that, Includes a guidewire torsion device and a guidewire as described in any one of claims 1-10, wherein the cap of the guidewire torsion device is inserted into the inner cavity until it contacts the end of the guidewire, and a plurality of protrusions in the inner cavity fix the guidewire circumferentially and axially.

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