阅读说明：本技术 一种组合穿刺装置 (Combined puncture device ) 是由 施文彬 谢少鹏 于 2019-10-14 设计创作，主要内容包括：本发明公开了一种组合穿刺装置,用于椎体手术中建立骨水泥注入通道,包括外套管和与之相配合的穿刺针,在外套管尾部设置有握柄,在握柄尾部平面的中间设置有螺纹接头,螺纹接头与外套管中的通道相通,穿刺针可经螺纹接头插入外套管内并在外套管内移动,在穿刺针尾部设置有固定推柄和旋转推柄,固定推柄上有可与握柄相卡合的自锁机构,在穿刺针的旋转推柄和固定推柄以及握柄之间还设置有旋转推出机构。本发明的优点是：组合穿刺装置拥有自锁机构,穿刺针和外套管能牢固结合,进入椎体的时候不会分离；进入椎体后,通过组合穿刺装置的旋转推出机构,穿刺针和外套管能轻松分离,操作简单、安全可靠,手术效果好。(The invention discloses a combined puncture device, which is used for establishing a bone cement injection channel in a vertebral body operation and comprises an outer sleeve and a puncture needle matched with the outer sleeve, wherein the tail part of the outer sleeve is provided with a grab handle, the middle of the plane at the tail part of the grab handle is provided with a threaded connector, the threaded connector is communicated with the channel in the outer sleeve, the puncture needle can be inserted into the outer sleeve through the threaded connector and moves in the outer sleeve, the tail part of the puncture needle is provided with a fixed push handle and a rotary push handle, the fixed push handle is provided with a self-locking mechanism which can be clamped with the grab handle, and a rotary push-out mechanism is also arranged among the rotary push handle, the fixed push handle. The invention has the advantages that: the combined puncture device is provided with a self-locking mechanism, the puncture needle and the outer sleeve can be firmly combined, and cannot be separated when entering a vertebral body; after entering the vertebral body, the puncture needle and the outer sleeve can be easily separated by the rotary pushing mechanism of the combined puncture device, and the operation is simple, safe and reliable and has good operation effect.)

1. Combination piercing depth, it includes outer tube and matched with pjncture needle with it, be provided with the grab handle at the outer tube afterbody, be provided with screwed joint in the planar centre of grab handle afterbody, the passageway in screwed joint and the outer tube communicates with each other, puncture needle tip portion can insert in the outer tube and remove in the outer tube through screwed joint, be provided with the rotation at the pjncture needle afterbody and push away the handle with fixed, the fixed self-locking mechanism who pushes away the handle on having can with grab handle looks block, still be provided with the rotation between the grab handle of the rotatory handle that pushes away of pjncture needle and fixed handle and outer tube and push away the mechanism, its characterized in that: a self-locking mechanism is arranged between the fixed push handle of the puncture needle and the grab handle of the outer sleeve, and a rotary push-out mechanism is arranged between the rotary push handle of the puncture needle, the fixed push handle and the grab handle of the outer sleeve.

2. The combination puncturing device of claim 1, wherein: the self-locking mechanism comprises: the clamping groove device is arranged on the side of the grab handle of the outer sleeve; a guide block device on the other side of the outer sleeve grab handle; the spring device is arranged in the puncture needle push handle; a stopper means at the front end of the spring means; a guide groove device outside the fixed push handle; when the outer sleeve grab handle is combined with the puncture needle fixing push handle guide groove device through the guide block device, the stop block device in the fixing push handle can automatically enter the middle of the clamping groove device of the grab handle.

3. Self-locking mechanism according to claim 2, characterised in that the spring in the spring means is a compression spring.

4. The self-locking mechanism of claim 2 wherein the upper front face of the stop means and the upper interior face of the detent means are angled at the same angle.

5. Self-locking mechanism according to claim 2, characterised in that the front lower end surface of the stop means is bevelled.

6. The combination puncturing device of claim 1, wherein: the rotary pushing mechanism comprises: the push-out block groove device is arranged at the tail part of the handle; the pushing block device is arranged in the fixed pushing handle; a bevel block device inside the fixed push handle; a guide post device outside the fixed push handle; the connecting rod device is arranged in the rotary push handle; a guide limit groove device outside the rotary push handle; when the rotating handle and the fixed handle rotate in the range of the guide limiting groove, the inclined plane block device can enable the stop block device to retract inwards, and the push block device can enable the fixed push handle of the puncture needle to be separated from the grab handle of the outer sleeve.

7. The rotary push-out mechanism according to claim 6, wherein: the pushing block device in the fixed pushing handle is of a cam structure.

8. The rotary push-out mechanism according to claim 6, wherein: the stop block device and the inclined block device are in surface contact.

Technical Field

The invention relates to the field of orthopedic medical instruments, in particular to a combined puncture device for establishing a bone cement injection channel in a vertebral body operation.

Background

Vertebroplasty, called percutaneous transluminal vertebroplasty (PVP), is a minimally invasive procedure in which bone cement (PMMA) or artificial bone is injected into a diseased vertebral body to strengthen the vertebral body. The combined puncture device is one of common instruments used in vertebral body surgery, and has the structure that: the puncture needle comprises an outer sleeve and a puncture needle matched with the outer sleeve, wherein a grab handle is arranged at the tail part of the outer sleeve, a threaded connector is arranged on the grab handle and is communicated with a channel in the outer sleeve, a fixed push handle is also arranged at the tail part of the puncture needle, the head part of the puncture needle can be inserted into the outer sleeve through the threaded connector and can move in the outer sleeve, a triangular cutting edge is arranged at the head part of the puncture needle, and after the puncture needle is completely inserted into the outer sleeve, the puncture needle and the outer sleeve are combined into.

The combined puncture device with the structure needs to be combined with an injector for use, during an operation, under the irradiation of X-ray, the triangular blade at the head of the combined puncture device punctures the vertebral arch plate at the rear edge of a pathological change vertebral body, brings the head of the outer sleeve into the pathological change vertebral body, then rotates and twists to withdraw the puncture needle, and finally the injector is used for injecting the prepared bone cement into the pathological change vertebral body through the threaded joint and the channel in the outer sleeve.

The combined puncturing device with the above structure has the main disadvantages that: firstly, the combined puncture needle outer sleeve with the structure is only suitable for patients with osteoporosis, if the bone of the patient is compact and has high strength, the puncture needle and the outer sleeve are easy to separate due to rotation during puncture, the puncture effect cannot be achieved, the outer sleeve cannot enter a vertebral body, and at the moment, the combined puncture device needs to be knocked into the diseased vertebral body by means of other tools so that subsequent operations can be carried out; secondly, in follow-up operation, the pjncture needle takes the outer tube to get into the inside back of the centrum of disease, if the sclerotin of disease is denser and intensity is higher, the outer tube can firmly be wrapped up to the cortex lycii layer, makes the outer tube produce a pressure towards the center to the pjncture needle, and pjncture needle and outer tube are difficult to separate, need the rotation wrench movement to withdraw from, can cause the secondary damage to patient's centrum.

Disclosure of Invention

The technical problems to be solved by the invention are as follows: provides a combined puncture device, which can make the outer sleeve smoothly inserted into the pathological vertebral body, then the puncture needle can be easily separated from the outer sleeve, and the outer sleeve is left in the vertebral body to establish a bone cement injection channel.

In order to solve the problems, the invention adopts the technical scheme that: the combined puncture device comprises an outer sleeve and a puncture needle matched with the outer sleeve, wherein a grab handle is arranged at the tail of the outer sleeve, a threaded joint is arranged in the middle of the plane at the tail of the grab handle, the threaded joint is communicated with a channel in the outer sleeve, the head of the puncture needle can be inserted into the outer sleeve through the threaded joint and can move in the outer sleeve, a rotary push handle and a fixed push handle are arranged at the tail of the puncture needle, a self-locking mechanism which can be clamped with the grab handle is arranged on the fixed push handle, and a rotary push-out mechanism is also arranged between the rotary push handle of the puncture needle and the grab handles of the fixed push handle.

Further, in the above-mentioned combined puncturing device, the self-locking mechanism includes: the clamping groove device is arranged on the side of the grab handle of the outer sleeve; the guide block device is arranged on the other side of the grab handle of the outer sleeve; the spring device is arranged in the puncture needle push handle; a stopper means at the front end of the spring means; a guide groove device outside the fixed push handle; the outer tube grab handle pushes away the handle guide way device through the guide block device is fixed with the pjncture needle and combines together, when the grab handle contacts the dog device, because the terminal surface is the inclined plane under the dog device, the inside spring of spring assembly is compression spring, the dog device can be toward the inside withdrawal, dodge the grab handle, the grab handle can continue to shift up, when the dog device meets the draw-in groove device of grab handle avris, the dog device can be because the automatic draw-in groove device that gets into the grab handle of compression spring device is middle, because the inside up end of up end and draw-in groove device is the inclined plane before the dog device again, and the angle is the same, so both can lead positive position automatically, thereby realize fixed connection between them.

Further, in the above-mentioned combined puncturing device, the rotary pushing mechanism comprises: the push-out block groove device is arranged at the tail part of the handle; the pushing block device is arranged in the fixed pushing handle; a bevel block device inside the fixed push handle; a guide post device outside the fixed push handle; the connecting rod device is arranged in the rotary push handle; a guide limit groove device outside the rotary push handle; when the rotary push handle guide limiting groove device and the guide column device of the fixed push handle rotate, when the rotary push handle guide limiting groove device rotates for 90 degrees, because the inclined plane block device is in surface contact with the stop block device, the inclined plane block device can enable the stop block device to retract inwards, the fixed push handle and the grab handle are not in locking relation, then the rotary push handle and the grab handle rotate for 90 degrees, the push block device can enable the fixed push handle of the puncture needle to be separated from the grab handle of the outer sleeve, the puncture needle does not need to be rotated and twisted, and the puncture needle can be easily separated from the outer sleeve.

The invention has the beneficial effects that: by adopting the combined puncture device with the structure, the relative positions of the puncture needle and the outer sleeve are locked through the self-locking mechanism, so that the head parts of the puncture needle and the outer sleeve are combined together and kept not to be loosened, and the puncture needle and the outer sleeve cannot be separated when being punctured due to surgical rotation; in the follow-up operation, after the puncture needle drives the outer sleeve to enter the vertebral body, the puncture needle and the outer sleeve can be separated only by rotating the rotary push handle, the puncture needle is easily drawn out, the establishment of a bone cement injection channel is completed, the puncture needle does not need to be pulled out by brute force, the puncture needle does not need to be pulled out in a rotary mode, the completed bone cement injection channel cannot be damaged, secondary damage to the vertebral body cannot be caused, the operation is simple, safe and reliable, and the operation effect is good.

Drawings

Fig. 1 is a schematic view of the overall structure of the combined puncturing device of the present invention.

Fig. 2 is a schematic view of the internal structure of the combined puncturing device of fig. 1.

Fig. 3 is an enlarged schematic view of the self-locking mechanism and the rotary push-out mechanism in fig. 2.

Fig. 4 is a schematic view of the structure of the rotary push handle of the puncture needle in fig. 1.

Fig. 5 is a schematic structural view of the fixed push handle of the puncture needle in fig. 1.

Fig. 6 is a schematic view of the structure of the outer casing handle of fig. 1.

Fig. 7 is a schematic diagram illustrating an abstract.

Detailed Description

The technical solution of the present invention will be further described in detail with reference to the accompanying drawings.

As shown in fig. 1, fig. 2, fig. 3, fig. 4, fig. 5 and fig. 6, the combined puncturing device according to the present invention comprises an outer cannula 2 and a puncturing needle 1 coupled thereto, wherein the puncturing needle 1 can be inserted and hermetically connected in the outer cannula 2, and the puncturing needle 1 and the outer cannula 2 can move relatively; the tail part of the outer sleeve 2 is provided with a grab handle 3 containing a threaded joint 8, the threaded joint 8 is communicated with a channel in the outer sleeve 2, and the head part of the puncture needle 1 can be inserted into the outer sleeve 2 through the threaded joint 8 and moves in the outer sleeve 2; fig. 1 shows a schematic position of the stop means 6 and a schematic position of the ejector block means 7 when the outer casing grip 3 is not yet connected to the fixed push handle 4; as shown in fig. 2, 5 and 6, a fixed push handle 4 is further arranged at the tail of the puncture needle 1, a stopper device 6 is arranged in the fixed push handle 4, when the outer sleeve grab handle 3 enters a guide groove device 16 on the fixed push handle 4 through a guide block device 14, the fixed push handle and the fixed push handle are combined, when the grab handle meets the stopper device 6, because the front lower end surface of the stopper device 6 is an inclined surface, the spring device 9 can be compressed, the stopper device 6 can automatically avoid, the grab handle 3 continuously slides upwards, when the stopper device 6 meets a slot device 13 in the grab handle 3, the stopper device 6 can automatically enter the slot device 13 because the spring device 9, and because the front upper end surface of the stopper device 6 and the inner upper end surface of the slot device 13 are inclined surfaces and have the same angle, the fixed connection between the fixed push handle and the fixed push; the fixed push handle 4 is connected with the rotary push handle 5 through a connecting rod device 17, a guide column device 15 on the fixed push handle 4 is arranged in a guide limiting groove device 11 on the rotary push handle 5, so that the rotary motion track of the rotary handle 5 is limited to be 0-180 degrees, wherein the inclined plane block device 10 and the push block device 7 are fixedly connected on the connecting rod device 17, and the connecting rod device 17 is fixedly connected with the rotary push handle 5; when the rotary push handle 5 and the fixed push handle 4 with the guide post device 15 do relative rotary motion through the guide limiting groove device 11, the rotary push handle 5 drives the inclined plane block device 10 and the push block device 7 to do rotary motion together, when the rotary push handle rotates to 90 degrees, because the inclined plane block device 10 and the stop block device 6 are in surface contact, the inclined plane block device 10 can push the stop block device 6 to retract, the stop block device 6 withdraws from the clamping groove device 13 of the grab handle 3, and when the rotary push handle rotates to 180 degrees, the push block device 7 can hold the push handle 3 to eject because of a cam structure, so that the separation of the grab handle 3 and the fixed push handle 4 is realized.

By adopting the combined puncture device with the structure, the relative positions of the puncture needle 1 and the outer sleeve 2 are locked through the self-locking mechanism, so that the puncture needle 1 and the outer sleeve 2 form a whole and keep not to be loosened, the head of the combined puncture device can be stably screwed into a pathological change vertebral body through the triangular blade no matter the pathological change vertebral body bone of a patient is loose or compact, the head of the combined puncture device can not be separated from the pathological change vertebral body due to rotary puncture, and a foundation is laid for subsequent operations; in the follow-up operation, after the puncture needle 1 takes the outer sleeve 2 to enter the vertebral body, only the rotary push handle 5 needs to be rotated, the puncture needle 1 and the outer sleeve 2 can be separated, the puncture needle 1 is easily drawn out, the establishment of a bone cement injection channel is completed, the puncture needle 1 does not need to be pulled out by brute force, the puncture needle 1 does not need to be pulled out by rotary twisting, the injection bone cement channel which is completed can not be damaged, the secondary injury to the vertebral body can not be caused, the operation is simple, the safety and the reliability are high, and the operation effect is good.