CN212650889U - Percutaneous vertebral pedicle puncture reamer - Google Patents

Abstract

The utility model discloses a percutaneous pedicle of vertebral arch puncture reamer, which comprises a puncture needle tube, a needle core and a handle, wherein the puncture needle tube is provided with a through hole for the needle core to pass through, the lower end of the puncture needle tube is provided with a base, and the base is provided with a clamping groove; the needle core comprises a body, a clamping end and a contact end, the handle is provided with a mounting groove and a matching groove, the mounting groove is communicated with the matching groove, and a middle contact platform is formed at the joint of the mounting groove and the matching groove; the body penetrates through the through hole, the base is accommodated in the mounting groove in a matching mode, the clamping end is accommodated in the clamping groove, and the needle core is rotated to enable the end portion of the needle core to extend out of or retract into the through hole. The percutaneous pedicle of vertebral arch puncture reamer is firstly in a puncture mode, after entering the pedicle of vertebral arch through a correct bone needle insertion point under the perspective monitoring, the needle core retracts the needle tube and rotates 90 degrees, the hole-expanding mode is changed, the needle tube is directly screwed into the pedicle of vertebral arch to reach the rear edge of a vertebral body, and the percutaneous pedicle of vertebral arch puncture reamer can be punctured and combined to enter the vertebral body after the perspective confirmation is necessary. The operation steps are simplified, the radiation injury is greatly reduced, and the development requirement of the thoracolumbar minimally invasive fixation operation is met.

Description

Percutaneous vertebral pedicle puncture reamer

Technical Field

The utility model relates to a medical operating instrument field especially relates to a percutaneous pedicle of vertebral arch puncture enlarger.

Background

At present, the domestic known minimally invasive pedicle screw is firstly punctured by a percutaneous pedicle puncture needle under the perspective monitoring and guide needle placing. The puncture needle is composed of a sharp needle core and a needle tube. The pedicle wall is easy to puncture in the puncture process, which causes puncture failure, damages the nerve root dura mater sac and damages the pedicle post-nail instability. In order to successfully puncture, the whole process of the puncture must be monitored by fluoroscopy for multiple times, radiation injury is caused, and the operation time is greatly prolonged.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, one of the purposes of the utility model is to provide a percutaneous pedicle of vertebral arch puncture reamer, which can solve the problem of easy error in puncture.

The utility model discloses an one of the purpose adopts following technical scheme to realize:

a percutaneous pedicle of vertebral arch puncture reamer comprises a puncture needle tube, a needle core and a handle, wherein the puncture needle tube is provided with a through hole for the needle core to pass through, the lower end of the puncture needle tube is provided with a base, and the base is provided with a clamping groove; the needle core comprises a body, a clamping end and a contact end, wherein the body and the contact end are respectively fixed at the upper part and the lower part of the clamping end; the handle is provided with a mounting groove and a matching groove, the mounting groove is communicated with the matching groove, and a middle abutting table is formed at the joint of the mounting groove and the matching groove; the body penetrates through the through hole, the base is contained in the mounting groove in a matching mode, the clamping end is contained in the clamping groove, and the needle core is rotated to enable the end portion of the needle core to extend out of or retract into the through hole.

Further, when the percutaneous pedicle of vertebral arch puncture reamer is in a puncture mode, the front end of the needle core extends out of the through hole and forms a sharp front end; the joint end is accommodated in the joint groove and is positioned in the mounting groove of the handle.

Further, when the percutaneous pedicle of vertebral arch puncture reamer is in a puncture mode, a gap is formed between the contact end and the bottom of the matching groove, and the clamping end abuts against the middle abutting table.

Further, the upper end of handle is provided with two upper portion conflict platforms, the base conflict in upper portion conflict platform.

Further, the base is being located the upper portion of upper portion conflict platform forms horizontal conflict face, goes up the base is being located the upper portion of middle part conflict platform forms vertical conflict face.

Further, when the percutaneous pedicle of vertebral arch puncture reamer is in a reaming mode, the needle core is rotated to enable the clamping end to slide into the matching groove, the abutting end abuts against the bottom of the matching groove, and the front end of the body retracts into the through hole to enable the front end of the percutaneous pedicle of vertebral arch puncture reamer to be flattened by a sharp point.

Furthermore, the upper part of the puncture needle tube is provided with a conical part, and both sides of the conical part are provided with side inclined planes.

Further, the top of the body is provided with a top inclined plane.

Furthermore, the puncture needle tube, the needle core and the handle are all made of 317-L medical stainless steel, and the diameter of the through hole is 2.0 mm.

Compared with the prior art, the beneficial effects of the utility model reside in that:

1. the body and the contact end are fixed on the upper part and the lower part of the clamping end respectively; the handle is provided with a mounting groove and a matching groove, the mounting groove is communicated with the matching groove, and a middle abutting table is formed at the joint of the mounting groove and the matching groove; the body penetrates through the through hole, the base is contained in the mounting groove in a matching mode, the clamping end is contained in the clamping groove, and the needle core is rotated to enable the end portion of the needle core to extend out of or retract into the through hole. The percutaneous pedicle of vertebral arch puncture reamer is firstly in a puncture mode, after the correct bone needle feeding point is confirmed to enter in a perspective mode, the needle core is retracted back the needle tube and rotated by 90 degrees to be changed into a reaming mode, the needle core is directly screwed into the pedicle of vertebral arch to reach the rear edge of a vertebral body, and the percutaneous pedicle of vertebral arch puncture reamer can be punctured and combined to enter the vertebral body after the confirmation of the perspective if necessary. The operation steps are simplified, the radiation injury is greatly reduced, and the development requirement of the thoracolumbar minimally invasive fixation minimally invasive operation is met.

2. The multifunctional minimally invasive screw nail machine can simultaneously puncture a plurality of centrums, accords with the pedicle anatomy characteristics of Chinese people, has the functions of percutaneous pedicle puncture and hole expansion, is suitable for the percutaneous pedicle puncture operation of minimally invasive pedicle screw placement in thoracolumbar surgery, can avoid puncturing the pedicle, is convenient for the simultaneous puncture of the plurality of centrums without mutual interference, obviously reduces radiation damage and shortens the operation time.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented according to the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more obvious and understandable, the following preferred embodiments are described in detail with reference to the accompanying drawings.

Drawings

Fig. 1 is an exploded view of a preferred embodiment of the percutaneous pedicle reamer of the present invention;

FIG. 2 is a perspective view of a puncture needle cannula of the percutaneous pedicle punch of FIG. 1;

FIG. 3 is a perspective view of a needle core of the percutaneous pedicle reamer of FIG. 1;

FIG. 4 is a perspective view of a handle of the percutaneous pedicle reamer of FIG. 1;

FIG. 5 is a partial view of the percutaneous pedicle punch of FIG. 1;

FIG. 6 is a perspective view of a puncture mode;

FIG. 7 is a cross-sectional view of the puncture mode;

FIG. 8 is another cross-sectional view of the puncture mode;

FIG. 9 is a perspective view of a reaming mode;

FIG. 10 is a cross-sectional view of a reaming mode;

fig. 11 is another cross-sectional view of the reaming mode.

In the figure: 10. puncturing a needle tube; 11. a tapered portion; 111. a side bevel; 12. a base; 121. A clamping groove; 13. a through hole; 20. a needle core; 21. a body; 211. a top bevel; 22. a clamping end; 23. a contact end; 30. a handle; 31. an upper abutting table; 32. a middle part abutting table; 33. Mounting grooves; 34. and (4) matching the groove.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that the embodiments or technical features described below can be arbitrarily combined to form a new embodiment without conflict.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1-11, a percutaneous pedicle of vertebral arch puncture reamer comprises a puncture needle tube 10, a needle core 20 and a handle 30, wherein the puncture needle tube 10 is provided with a through hole 13 for the needle core 20 to pass through, the lower end of the puncture needle tube 10 is provided with a base 12, and the base 12 is provided with a clamping groove 121; the needle core 20 comprises a body 21, a clamping end 22 and a contact end 23, wherein the body 21 and the contact end 23 are respectively fixed on the upper part and the lower part of the clamping end 22; the handle 30 is provided with a mounting groove 33 and a matching groove 34, the mounting groove 33 is communicated with the matching groove 34, and a middle abutting table 32 is formed at the joint of the mounting groove 33 and the matching groove 34; the body 21 penetrates through the through hole 13, the base 12 is accommodated in the mounting groove 33 in a matching mode, the clamping end 22 is accommodated in the clamping groove 121, and the needle core 20 is rotated to enable the end portion of the needle core 20 to extend out of or retract into the through hole 13. The percutaneous pedicle of vertebral arch puncture reamer is firstly in a puncture mode, after the correct bone needle feeding point is confirmed to enter in a perspective mode, the needle core is retracted back the needle tube and rotated by 90 degrees to be changed into a reaming mode, the needle core is directly screwed into the pedicle of vertebral arch to reach the rear edge of a vertebral body, and the percutaneous pedicle of vertebral arch puncture reamer can be punctured and combined to enter the vertebral body after the confirmation of the perspective if necessary. The operation steps are simplified, the radiation injury is greatly reduced, and the development requirement of the thoracolumbar minimally invasive fixation minimally invasive operation is met.

Referring to fig. 6-8, preferably, when the percutaneous pedicle reamer is in the puncturing mode, the contact end 23 forms a gap with the bottom of the matching groove 34, a matching column is disposed in the gap, and two ends of the matching column respectively contact the contact end 23 and the bottom of the matching groove 34. In this way, the puncture mode is ensured to be smoothly performed.

The working principle is as follows: firstly, the needle core 20 is sleeved into the puncture needle tube 10, the rear end of the needle core 20 is sleeved into the groove at the rear end of the puncture needle tube 10, at the moment, the tip of a 6mm inclined plane at the front end of the needle core 20 is exposed out of the front end of the puncture needle tube 10 to form a solid cylinder, the outer diameter is small, the front end is sharp, a puncture combined mode is formed, the needle directly penetrates soft tissues such as subcutaneous tissues, muscles and the like through a small skin incision, the bone needle inlet point at the junction of the probing transverse process and the upper articular process breaks through the rear outer side wall of the vertebral pedicle, and percutaneous. The position of the bone needle insertion point is confirmed to be correct through perspective, and the tip end of the needle reaches the external part of the vertebral pedicle cavity. The needle core is withdrawn and rotated by 90 degrees, the tip end of the needle core is withdrawn into the needle tube at the moment, the rear end of the needle core is clamped outside the groove at the rear end of the needle tube and is sleeved into the handle to form a hole expanding mode, so that the tip end avoids the cortical bone wall of the vertebral pedicle and advances along the cancellous bone cavity to realize the automatic track seeking function, and when the tip end is expanded to the back wall of the vertebral body through the inner hole of the vertebral pedicle, the resistance is obviously increased. After the perspective confirmation, the puncturing mode is changed to puncture the back wall of the vertebral body, the handle and the inner core are pulled out, and the guide pin is placed to complete the thread changing and nail placing.

Preferably, in other embodiments, when the percutaneous pedicle reamer is in the puncturing mode, the contact end 23 forms a gap with the bottom of the matching groove 34, and the clamping end 22 abuts against the middle abutting table 32. The lower part of the puncture needle tube 10 can be ensured to be abutted, and the lower part of the needle core 20 can be ensured to be abutted.

Preferably, the upper end of the handle 30 is provided with two upper abutting tables 31, and the base 12 abuts against the upper abutting tables 31. The base 12 forms a horizontal collision surface on the upper part of the upper collision table 31, and the base 12 forms a vertical collision surface on the upper part of the middle collision table 32. The cross-shaped collision mode ensures that the collision stability is good and the precision is high.

Referring to fig. 9-11, preferably, when the percutaneous pedicle screw reamer is in the reaming mode, the needle core 20 is rotated to slide the clamping end 22 into the matching groove 34, so that the contact end 23 abuts against the bottom of the matching groove 34, and the front end of the body 21 is retracted into the through hole 13. By providing the engagement groove 34: the front end of the body 21 is retracted into the through hole 13 in the reaming mode. The device has simple and reasonable design, is minimally invasive and safe to operate, can simultaneously puncture a plurality of centrums, accords with the pedicle dissection characteristics of Chinese people, has the functions of percutaneous pedicle puncture and hole expansion, is suitable for the percutaneous pedicle puncture operation of minimally invasive pedicle screw placement in thoracolumbar surgery, can avoid puncturing the pedicle, facilitates the simultaneous puncture of the plurality of centrums without mutual interference, obviously reduces radiation damage and shortens the surgery time.

Preferably, the puncture needle tube 10 is provided with a tapered portion 11 at an upper portion thereof, and both sides of the tapered portion 11 are provided with side slopes 111. The top of the body 21 is provided with a top slope 211. The puncture needle tube 10, the needle core 20 and the handle 30 are all made of 317-L medical stainless steel, and the diameter of the through hole 13 is 2.0 mm.

Specifically, in practical application, the 20mm length of the front part of the puncture needle tube 10 is designed into a tube shape with the inner diameter of 2mm, the outer diameter of 4mm and the wall thickness of 1mm, the front end is a hemisphere with a 2mm tube opening, the left side and the right side of the puncture needle tube are stripped in a trapezoid manner, the rear part of the puncture needle tube is thickened, the left side and the right side of the puncture needle tube are stripped in a trapezoid manner, and a groove matched with the rear part of a needle core. The needle core 20 is a cylinder with the diameter of 1.96mm, the front end 6mm is a bevel tip, and the back part is thickened, and the left side and the right side are peeled flat. The handle is provided with a groove which is matched with the needle tube and the back part of the needle core. Under the puncture combination mode, the tip of the 6mm inclined plane at the front end of the needle core is exposed out of the front end of the needle tube to form a solid cylinder, the outer diameter is small, the front end is sharp, the needle can directly penetrate soft tissues such as subcutaneous tissues and muscles through a small skin incision, the rear outer side wall of the vertebral pedicle is broken through, and percutaneous puncture is realized.

In the actual operation, the position of the bone needle insertion point is confirmed to be correct through perspective, and the needle tip reaches the back external part of the pedicle cavity. Withdrawing the needle core 20 and rotating for 90 degrees, withdrawing the needle tube from the tip of the needle core, sleeving the handle to form a hole expanding mode, blunting the front end, avoiding the situation that the vertebral pedicle cortical bone wall cannot be penetrated, advancing along the cancellous bone cavity, realizing the automatic track searching function, obviously increasing the resistance when expanding the hole in the vertebral pedicle to the back wall of the vertebral body, penetrating the back wall of the vertebral body by changing the penetrating mode after the perspective confirmation, pulling out the handle and the inner core, and putting in a guide pin to complete the tapping and nail placement.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention cannot be limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are all within the protection scope of the present invention.

Claims (6)

1. The utility model provides a percutaneous pedicle of vertebral arch puncture enlarger, includes puncture needle tubing, needle pistil, handle, its characterized in that:

the puncture needle tube is provided with a through hole for the needle core to pass through, the lower end of the puncture needle tube is provided with a base, and the base is provided with a clamping groove;

the needle core comprises a body, a clamping end and a contact end, wherein the body and the contact end are respectively fixed at the upper part and the lower part of the clamping end;

the handle is provided with a mounting groove and a matching groove, the mounting groove is communicated with the matching groove, and a middle abutting table is formed at the joint of the mounting groove and the matching groove;

the body penetrates through the through hole, the base is contained in the mounting groove in a matching mode, the clamping end is contained in the clamping groove, and the needle core is rotated to enable the end portion of the needle core to extend out of or retract into the through hole.

2. The percutaneous pedicle puncture reamer of claim 1, wherein: the upper end of handle is provided with two upper portion conflict platforms, the base conflict in upper portion conflict platform.

3. The percutaneous pedicle puncture reamer of claim 2, wherein: the base is lieing in the upper portion of upper portion conflict platform forms horizontal conflict face, goes up the base is lieing in the upper portion of middle part conflict platform forms vertical conflict face.

4. The percutaneous pedicle puncture reamer of claim 1, wherein: the upper portion of puncture needle tubing is provided with the toper portion, the both sides of toper portion all are provided with the lateral part inclined plane.

5. The percutaneous pedicle puncture reamer of claim 1, wherein: the top of the body is provided with a top inclined plane.

6. The percutaneous pedicle puncture reamer of claim 1, wherein: the puncture needle tube, the needle core and the handle are all made of 317-L medical stainless steel, and the diameter of the through hole is 2.0 mm.

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