Auxiliary device for secondary folding of balloon

Abstract

The utility model discloses a balloon secondary folding auxiliary device which comprises a movable ring and fixed rings coaxially arranged at the two ends of the movable ring, a plurality of clamping blocks are connected between the two fixed rings, the clamping blocks are evenly distributed in the circumferential direction, and the number of the clamping blocks is the same as that of balloon folding wings. Connecting rods are arranged between the two ends of the clamping block and the two ends of the movable ring, and the two ends of the connecting rods are rotationally connected with the fixed ring and the movable ring respectively and are arranged in a staggered mode in the radial direction of the fixed ring. When the movable ring rotates in the forward direction, the clamping blocks can automatically rotate towards the axis of the fixed ring to gather together, otherwise, when the movable ring rotates in the reverse direction, the clamping blocks can automatically rotate away from the axis of the fixed ring to be opened, and therefore the balloon placed on the axis of the fixed ring is folded in an auxiliary mode, the whole structure is simple, use is convenient, and cost is low. A doctor can conveniently conduct secondary folding on the expanded balloon body in an operating room, the secondary folding forming effect of the balloon is improved, repeated use of the same patient is achieved, and the operation cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of auxiliary tooling for medical equipment, in particular to a secondary folding auxiliary device for a balloon. Background Art

[0002] The vertebroplasty balloon dilatation catheter is a surgical instrument intended to establish a working channel and form a cement perfusion cavity during percutaneous kyphoplasty. It is an interventional but not implanted procedure. When in use, the vertebral working channel is first established through percutaneous puncture, and the balloon dilatation catheter is placed in the vertebral body through the channel. Then, the locking joint of the balloon filling device is connected to the one-way valve / Luer joint of the balloon dilatation catheter. The balloon filling device is used to pressurize the balloon through the developer to achieve gradual expansion of the balloon in the vertebral body, thereby establishing a cavity for injecting bone cement. The balloon part of the interventional device needs to be folded before packaging. After the balloon is folded, the volume of the balloon itself is greatly reduced. After the device enters the human body, it maintains a smaller diameter before expansion, so that it can easily pass through the narrow section without damaging the blood vessels. This part of the process is basically completed using an automatic folding machine imported from abroad.

[0003] According to the requirements of Appendix B in YY / T 0285.4-2017, all parts of the vertebral dilatation balloon catheter should be able to withstand 10 fatigue tests without rupture or leakage. If the patient has more than one vertebra that needs to be expanded, the same vertebral dilatation balloon catheter needs to be reused to save the cost of surgical instruments. In order to facilitate re-entry into the vertebral body, the balloon should be folded again. Since the imported automatic balloon folding machine is expensive and has a complex structure, it requires special personnel to debug and operate, and cannot be applied to major hospitals. Doctors can only perform pure manual folding. After folding, the outer diameter is too large or the folded wings are uneven, and the effect is not good. Utility Model Content

[0004] The purpose of the utility model is to propose a balloon secondary folding auxiliary device in view of the shortcomings of the prior art. The device has a simple structure and is easy to use, which makes it convenient for doctors to perform secondary folding on an already expanded balloon in an operating room, thereby improving the secondary folding molding effect of the balloon, achieving repeated use on the same patient, and saving surgical costs.

[0005] The technical solution to achieve the purpose of this utility model is:

[0006] A balloon secondary folding auxiliary device comprises a moving coil and a fixed coil coaxially arranged at both ends of the moving coil, a plurality of clamping blocks uniformly distributed along the circumferential direction and having the same number as the folding wings of the balloon are connected between the two fixed coils, the clamping blocks are axially rotationally connected to the fixed coil and connecting rods are respectively arranged between the two ends of the moving coil, the two ends of the connecting rod are respectively rotationally connected to the fixed coil and the moving coil and are radially staggered along the fixed coil.

[0007] Furthermore, the clamping block is a columnar structure, and the cross section of the columnar structure is an airfoil structure.

[0008] Furthermore, the cross section includes a first straight edge, a first curved edge and a second curved edge which are connected in sequence to form an airfoil structure, the connecting rod and the fixed ring are respectively connected to the two ends of the first straight edge, and a tip extending toward the axis of the fixed ring is formed between the first curved edge and the second curved edge.

[0009] Furthermore, the tip is provided with a circular chamfer.

[0010] Furthermore, there is an arc transition between the first straight edge and the first curved edge.

[0011] Furthermore, the connecting rod is an arc-shaped structure bent toward the axial direction of the fixed ring.

[0012] Furthermore, the clamping block is provided with a through hole along the axial direction, a connecting shaft is passed through the through hole, and bearings are connected between the two ends of the connecting shaft and the corresponding connecting rods respectively.

[0013] Furthermore, it also includes a bracket and a driving motor, the fixed ring and the driving motor are fixedly mounted on the bracket, the outer wall of the moving ring is provided with gear teeth along the circumferential direction, and the output shaft of the driving motor is coaxially fixedly mounted with a gear meshing with the gear teeth.

[0014] By adopting the above technical solution, the utility model has the following beneficial effects:

[0015] (1) The utility model provides a plurality of rotatable clamping blocks between two fixed coils, and connects the clamping blocks and the moving coil by a connecting rod, so that when the moving coil rotates in the forward direction, the clamping blocks can automatically rotate and gather toward the axis of the fixed coil; conversely, when the moving coil rotates in the reverse direction, the clamping blocks can automatically rotate and open away from the axis of the fixed coil, thereby assisting in folding the balloon placed on the axis of the fixed coil. The overall structure is simple and easy to use, which is convenient for doctors to perform secondary folding of the expanded balloon in the operating room, thereby improving the secondary folding molding effect of the balloon, realizing repeated use on the same patient, and saving surgical costs.

[0016] (2) The clamping block of the utility model adopts a columnar structure with a wing-shaped cross section, so that during the folding process of the balloon, the folded surface of the balloon body can fit with the clamping block, the force is more uniform, and the folding effect is improved.

[0017] (3) The airfoil cross section of the utility model is surrounded by a straight edge and two curved edges, which can better fit the wrinkled surface of the balloon body and further improve the folding effect.

[0018] (4) The tip of the utility model is provided with a circular chamfer to avoid damaging the surface of the balloon when the balloon is compressed.

[0019] (5) The first straight side and the first curved side of the utility model are transitioned into an arc, thereby providing more avoidance space for the rotation of the clamping block, reducing the size of the moving coil, and making the entire device more compact.

[0020] (6) The connecting rod of the utility model is an arc-shaped structure, which avoids the occurrence of dead points during the movement of the clamping block and achieves a larger stroke.

[0021] (7) The utility model adopts a connecting shaft and a bearing that penetrates the clamping block to realize the rotational connection between the clamping block and the fixed ring, so that the coaxiality of the clamping block is higher during the rotation process, thereby improving the folding accuracy.

[0022] (8) The utility model optimizes the outer wall of the moving coil into a gear ring structure, which can realize semi-automatic folding with a simple structure through the drive of the motor gear. It can be promoted for use in the balloon folding packaging of small enterprises and has a wider range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to make the content of the utility model easier to understand, the utility model is further described in detail below according to specific embodiments and in conjunction with the accompanying drawings, wherein:

[0024] Figure 1 It is a simplified structural diagram of the utility model;

[0025] Figure 2 It is the front view of the utility model;

[0026] Figure 3 It is a left view of the utility model;

[0027] Figure 4 It is a schematic diagram of folding the balloon of the utility model.

[0028] The reference numerals in the accompanying drawings are:

[0029] Moving coil 1, fixed coil 2, clamping block 3, first straight side 3-1, first curved side 3-2, second curved side 3-3, connecting rod 4, connecting shaft 5. DETAILED DESCRIPTION

[0030] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0031] (Example 1)

[0032] like Figure 1 and Figure 4The balloon secondary folding auxiliary device shown includes a moving coil 1, a fixed coil 2 and a clamping block 3, wherein the fixed coil 2 is provided with two and is coaxially arranged at the two ends of the moving coil 2, the number of the clamping blocks 3 is the same as the number of the balloon folding wings, and five are provided in this embodiment and are evenly distributed along the circumferential direction, both ends of each clamping block 3 are rotatably connected to the fixed coil 2 and a connecting rod 4 is provided between the two ends of the moving coil 1, the connecting rod 4 is rotatably connected to the fixed coil 2 and the moving coil 1 respectively and is staggered along the radial direction of the fixed coil. By providing a plurality of rotatable clamping blocks 3 between the two fixed circles 2, and connecting the clamping blocks 3 and the moving circle 1 through the connecting rod 4, when the moving circle 1 rotates clockwise, the clamping blocks 3 can automatically rotate and gather toward the axis of the fixed circle 2, and vice versa, when the moving circle rotates counterclockwise, the clamping blocks 3 can automatically rotate and open toward the axis away from the fixed circle 2, thereby assisting in folding the balloon placed on the axis of the fixed circle 2. The overall structure is simple and easy to use, which is convenient for doctors to perform secondary folding of the already expanded balloon in the operating room, thereby improving the secondary folding molding effect of the balloon, realizing repeated use for the same patient, and saving surgical costs.

[0033] Specifically, the clamp block 3 is provided with a through hole along the axial direction, and a connecting shaft 5 is provided through the through hole. The two ends of the connecting shaft 5 are respectively connected to the corresponding connecting rod 4 with bearings. The clamp block 3 and the fixed ring 2 are connected in rotation by using the connecting shaft 5 and the bearings that penetrate the clamp block 3, so that the clamp block 3 has a higher coaxiality during the rotation process, and the folding accuracy is improved. The connecting rod 4 is an arc-shaped structure that bends toward the axis direction of the fixed ring 2, so as to avoid dead points during the action of the clamp block 3 and achieve a larger stroke.

[0034] The clamp 3 is a columnar structure, and the cross section of the columnar structure is an airfoil structure, which is more suitable for the gap between the adjacent folded wings of the balloon body. At the same time, the columnar structure allows the balloon body's wrinkled surface to fit with the clamp 3 during the folding process, so that the force is more uniform and the folding effect is improved. The cross section includes a first straight edge 3-1, a first curved edge 3-2, and a second curved edge 3-3 that are connected in sequence to form an airfoil structure. The connecting rod 4 and the fixed circle 2 are respectively connected to the two ends of the first straight edge 3-1, and a tip extending toward the axis of the fixed circle is formed between the first curved edge 3-2 and the second curved edge 3-3. The tip is provided with an arc chamfer to avoid damaging the surface of the balloon body when the balloon is compressed. There is an arc transition between the first straight edge 3-1 and the first curved edge 3-2, thereby providing more avoidance space for the rotation of the clamp 3, reducing the size of the moving coil 1, and making the entire device more compact.

[0035] The working process of this embodiment is as follows: when in use, the filling device can be used to properly inflate the balloon body, the fixed circle 2 is held still, and the movable circle 1 is rotated, and the tips of the clamping blocks 3 will gather toward the center of the circle, thereby dividing the balloon body. As the tips of the clamping blocks 3 are gradually stressed, the filling device can be used to evacuate the balloon body.

[0036] (Example 2)

[0037] The structure of this embodiment is similar to that of the first embodiment, except that it further includes a bracket and a driving motor, wherein the fixed coil 2 and the driving motor are both fixedly mounted on the bracket, the outer wall of the moving coil 1 is provided with gear teeth along the circumferential direction, and the output shaft of the driving motor is coaxially fixedly mounted with a gear meshing with the gear teeth. By optimizing the outer wall of the moving coil 1 into a gear ring structure, the semi-automatic folding with a simple structure can be achieved by driving the motor gear, and it can be promoted for use in balloon folding packaging of small enterprises, and has a wider range of applications.

[0038] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A balloon secondary folding auxiliary device, characterized in that: The invention comprises a moving coil (1) and fixed coils coaxially arranged at both ends of the moving coil, a plurality of clamping blocks evenly distributed along the circumferential direction and having the same number as the flaps of the balloon are connected between the two fixed coils, the clamping blocks are axially rotatably connected to the fixed coil and connecting rods are arranged between the two ends of the moving coil, the two ends of the connecting rods are respectively rotatably connected to the fixed coil and the moving coil and are arranged in a radially staggered manner along the fixed coil.

2. A balloon secondary folding auxiliary device according to claim 1, characterized in that: The clamping block is a columnar structure, and the cross section of the columnar structure is an airfoil structure.

3. A balloon secondary folding auxiliary device according to claim 2, characterized in that: The cross section includes a first straight side, a first curved side and a second curved side which are connected in sequence to form an airfoil structure. The connecting rod and the fixed ring are respectively connected to the two ends of the first straight side. A tip extending toward the axis of the fixed ring is formed between the first curved side and the second curved side.

4. A balloon secondary folding auxiliary device according to claim 3, characterized in that: The tip is provided with a circular arc chamfer.

5. The balloon secondary folding auxiliary device according to claim 3, characterized in that: The first straight edge and the first curved edge have an arc transition.

6. The balloon secondary folding auxiliary device according to claim 1, characterized in that: The connecting rod is an arc-shaped structure bent toward the axial direction of the fixed ring.

7. The balloon secondary folding auxiliary device according to claim 1, characterized in that: The clamp block is provided with a through hole along the axial direction, a connecting shaft is passed through the through hole, and bearings are connected between the two ends of the connecting shaft and the corresponding connecting rods respectively.

8. The balloon secondary folding auxiliary device according to claim 1, characterized in that: It also includes a bracket and a driving motor, wherein the fixed ring and the driving motor are both fixedly mounted on the bracket, the outer wall of the moving ring is provided with gear teeth along the circumferential direction, and the output shaft of the driving motor is coaxially fixedly mounted with a gear meshing with the gear teeth.

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