CN215349315U

CN215349315U - Novel puncture needle

Info

Publication number: CN215349315U
Application number: CN202120290321.5U
Authority: CN
Inventors: 孙德志; 李刚
Original assignee: Zhejiang Jiayou Medical Instrument Co ltd
Current assignee: Zhejiang Jiayou Medical Instrument Co ltd
Priority date: 2021-02-02
Filing date: 2021-02-02
Publication date: 2021-12-31
Anticipated expiration: 2031-02-02

Abstract

The utility model belongs to the field of medical instruments for centrum puncture, and particularly relates to a novel puncture needle. A novel puncture needle comprises a sleeve handle, wherein a hollow needle tube is arranged on the sleeve handle, and a lateral outlet is formed in the far end of the hollow needle tube; a puncture inner core is arranged in the hollow needle tube, and the near end of the puncture inner core is rotatably connected with an inner core handle; the inner core handle is provided with a plurality of locking blocks, correspondingly, and the sleeve handle is provided with a plurality of locking grooves.

Description

Novel puncture needle

Technical Field

The utility model belongs to the field of medical instruments for centrum puncture, and particularly relates to a novel puncture needle.

Background

The osteoporotic vertebral compression fracture is a common disease which harms the health of middle-aged and elderly people, and for the osteoporotic vertebral compression fracture, the traditional treatment method is mainly conservative and comprises bed rest, medicine pain relief, brace external fixation and the like, so that the further loss of bone mass is easily caused, and the osteoporosis is aggravated, so that a vicious circle is formed; the open surgery often causes internal fixation failure due to the fact that the whole body of a patient is not good and the fixing strength of the screw is insufficient.

The french physician Deramond et al reported in 1987 that the use of Percutaneous Vertebroplasty (PVP) for the treatment of invasive hemangiomas of the C2 vertebral body gave good results. Thereafter, the technique has also been applied to vertebral body malignancies and osteoporosis. The operation has the disadvantages that only the injured vertebra is fixed and the pain is relieved, the vertebral body height can not be recovered and the kyphosis deformity can not be corrected, and because the low-viscosity bone cement is directly injected into the spongy bone of the vertebral body under higher pressure, the flow of the low-viscosity bone cement is difficult to control, the bone cement leakage rate is higher, and the literature report is 30-67%. By 1994, Reiley et al, an american scholars, based on PVP, devised a technique to correct kyphotic deformity by balloon expansion, known as balloon-expanded kyphoplasty (PKP), which was approved by the FDA for clinical use in 1998. The technology utilizes percutaneous puncture to place an expandable balloon into a collapsed vertebral body, lifts an end plate through expansion of the balloon, restores the height of the vertebral body, corrects the kyphosis, forms a cavity with bone shells around the vertebral body, and pours high-viscosity bone cement under lower pressure.

In order to enable the balloon to smoothly enter the vertebral body, a working channel needs to be established by a puncture needle and a working sleeve, then a working cavity channel of the balloon before expansion is drilled by a bone drill, the balloon is sent into the vertebral body, a cavity with bone shells around is formed in the vertebral body, then the balloon is withdrawn, and finally bone cement is injected, so that the operation steps are complicated; meanwhile, due to the structure of the vertebral body, in order to keep the stress balance on the biomechanics of the vertebral body, balloon expansion on both sides and bone cement injection are required to be carried out on each section of the vertebral body. The operation needs to be operated under the X-ray monitoring, the more tedious the operation process, the longer the time, the greater the health damage to the doctor and the higher the physical requirement; the bilateral balloon dilatation and the injection of bone cement have large trauma to the patient, large chance of complications and increase the economic burden of the patient, and the above disadvantages become more prominent in the case of the lesion of the multiple vertebral bodies.

In view of the above disadvantages, the present invention is to provide a novel puncture needle, which can observe the specific position of the guiding hole with the aid of X-ray during the operation, and can effectively solve the problems of the prior art, such as prolonged operation time due to inaccurate puncture positioning during the operation and reduced operation treatment quality due to inaccurate expansion position.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to a novel puncture needle to solve the problems set forth in the background art.

In order to achieve the purpose, the utility model provides the following technical scheme:

a novel puncture needle comprises a sleeve handle, wherein a hollow needle tube is arranged on the sleeve handle, and a lateral outlet is formed in the far end of the hollow needle tube; a puncture inner core is arranged in the hollow needle tube, and the near end of the puncture inner core is rotatably connected with an inner core handle; the inner core handle is provided with a plurality of locking blocks, correspondingly, and the sleeve handle is provided with a plurality of locking grooves.

Preferably, the inner wall of the hollow needle tube is attached to the puncture inner core; the lateral outlet is provided with a guide groove, and the far end of the puncture inner core is attached to the guide groove.

Preferably, the hollow part of the hollow needle tube has a proximal end diameter larger than a distal end diameter; the diameter decreases gradually from the proximal end to the distal end.

Preferably, the puncture inner core is provided with a fixed platform, and the fixed platform is arranged at the non-tail end position of the puncture inner core; correspondingly, the inner core handle is provided with a puncture inner core mounting groove.

Preferably, the inner core handle is provided with a plurality of inner core handle limiting rods, and correspondingly, the puncture inner core is provided with a plurality of puncture inner core limiting rods.

Preferably, the inner core handle is provided with two locking blocks which correspond to each other, and the sleeve handle is provided with two locking grooves.

Preferably, the locking block is provided with a plurality of limiting depressions, and correspondingly, the groove wall of the locking groove is provided with a plurality of limiting bulges.

Preferably, a locking groove limiting block is arranged in the locking groove.

Preferably, the sleeve handle is provided with a sleeve handle limiting ring, and correspondingly, the inner core handle is provided with an inner core handle limiting ring.

Compared with the prior art, the utility model has the beneficial effects that:

(1) the inner wall of the hollow needle tube is attached to the puncture inner core, and the far end of the puncture inner core is attached to the guide groove; the arrangement can improve the integration degree of the puncture needle, and prevent the hollow needle tube from being bent due to the arrangement of the lateral outlet in the puncture process, and the needle head of the hollow needle tube can bear higher pressure; the guide groove can also guide the puncture catheter and the balloon catheter;

(2) the diameter of the proximal end of the hollow needle tube is larger than that of the distal end, and the diameter of the hollow needle tube is gradually reduced from the proximal end to the distal end; the puncture inner core is inserted into the hollow needle tube to the designed position, the fit between the puncture inner core and the hollow needle tube is better, and when the inner core handle and the sleeve tube handle are locked, the locking is more tight;

(3) the puncture inner core is provided with the fixing platform which is arranged at the non-tail end position of the puncture inner core, compared with the fixing platform which is arranged at the near end position of the puncture inner core, the possibility of shaking of the puncture inner core is lower due to the arrangement, and only the axial rotation can be generated between the puncture inner core and the inner core handle;

(4) the inner core handle and the sleeve handle are both provided with limiting rods, so that the puncture inner core and the inner core handle can only rotate within a certain angle range, the arrangement limits the flexibility between the puncture inner core and the inner core handle, and the service life between the puncture inner core and the inner core handle which are rotatably connected is prolonged;

(5) the inner core handle is provided with two locking blocks which correspond to each other, and the sleeve handle is provided with two locking grooves; the inner core handle and the sleeve handle are fixed in a fixed shape when locked through the matching of the locking block and the locking groove, so that the integration degree of the inner core handle and the sleeve handle in a locking state is improved;

(6) the limiting recess on the locking block is matched with the limiting bulge on the groove wall of the locking groove, so that the locking and fixing effects of the locking block and the locking groove are enhanced;

(7) through the cooperation of sleeve pipe handle spacing ring and inner core handle spacing ring, when inner core handle and sleeve pipe handle locking, reduce the transverse force that the puncture inner core received.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic diagram of the cannula handle-hollow needle cannula combination of the device of FIG. 1;

FIG. 3 is a schematic view of the structure of the inner handle-plunger assembly of FIG. 1;

FIG. 4 is a top view of the combination hub-plunger assembly of the device of FIG. 1;

FIG. 5 is a cross-sectional view of the combination hub-plunger assembly of the device of FIG. 1;

FIG. 6 is a schematic view of the structure of the inner piercing core of the device of FIG. 1;

in the figure: 1. a cannula handle; 2. a hollow needle tube; 3. a lateral outlet; 4. puncturing the inner core; 5. an inner core handle; 6. a locking block; 7. a locking groove; 8. a guide groove; 9. a fixed table; 10. a puncture inner core mounting groove; 11. an inner core handle limiting rod; 12. puncturing an inner core limiting rod; 13. limiting and sinking; 14. a limiting bulge; 15. a locking groove stopper; 16. a sleeve handle limiting ring; 17. inner core handle spacing ring.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. In this specification, a position close to the operator is referred to as a proximal end, and a position far from the operator is referred to as a distal end.

The utility model provides a novel puncture needle, includes sleeve pipe handle 1, is equipped with cavity needle tubing 2 on the sleeve pipe handle 1, is equipped with side direction export 3 at the distal end of cavity needle tubing 2, and the puncture guide pin is worn out to side direction export 3, is equipped with guide way 8 in side direction export 3 department simultaneously, and guide way 8 provides the direction for the puncture guide pin is established puncture passageway. The puncture inner core 4 is arranged inside the hollow needle tube 2, when the puncture inner core 4 reaches the designed position inside the hollow needle tube 2, the puncture inner core 4 is completely attached to the inner wall of the hollow needle tube 2, meanwhile, the far end of the puncture inner core 4 is attached to the guide groove 8, the puncture inner core 4 completely fills the space inside the hollow needle tube 2, and the needle head or the tube body of the hollow needle tube 2 is prevented from being bent in the puncture process. The proximal end of the puncture inner core 4 is rotatably connected with an inner core handle 5, a fixing platform 9 is arranged at the non-terminal position close to the proximal end of the puncture inner core 4, a puncture inner core mounting groove 10 arranged in the inner core handle 5 is arranged, and the puncture inner core 4 and the inner core handle 5 can rotate around a shaft. When the puncture inner core 4 is inserted into the hollow needle tube 2 to the designed position, the inner core handle 5 is rotated, so that the inner core handle 5 and the cannula handle 1 are positioned on the same plane. The puncture inner core 4 is prevented from sliding out of the hollow needle tube 2, two locking blocks 6 are arranged on the inner core handle 5, and two locking grooves 7 are correspondingly arranged on the sleeve tube handle 1. When the inner core handle 5 and the sleeve handle 1 are in the same plane, the two locking blocks 6 are respectively embedded into the corresponding locking grooves 7. All be equipped with locking groove stopper 15 in two locking grooves 7, when two locking piece 6 lean on respectively tightly the locking groove stopper 15 that corresponds separately, inner core handle 5 just in time is located the coplanar with sleeve pipe handle 1. Simultaneously, be equipped with spacing arch 14 on the inner wall of locking groove 7, this spacing arch 14 is corresponding with spacing sunken 13 on the locking piece 6, carries on spacingly to the locking piece 6 that imbeds locking groove 7, makes locking piece 6 need exert the power of a certain extent just can realize imbedding or deviating from the process in locking groove 7. In order to avoid the rotation between the puncture inner core 4 and the inner core handle 5 to be too flexible, two inner core handle limiting rods 11 are arranged on the inner core handle 5, correspondingly, one puncture inner core limiting rod 12 is arranged on the puncture inner core 4, and the structure ensures that only small-angle axial rotation can be generated between the inner core handle 5 and the puncture inner core 4. The angle just leads the locking block 6 to be completely separated from the locking groove 7, and the service life between the puncture inner core 4 and the inner core handle 5 which are connected in a rotating way is prolonged on the premise of ensuring that the puncture inner core 4 is smoothly drawn out from the hollow needle tube 2. The puncture inner core 4 is provided with a puncture handle limiting ring 17, correspondingly, the sleeve handle 1 is provided with a sleeve handle limiting ring 16, and through the matching of the sleeve handle limiting ring 16 and the inner core handle limiting ring 17, when the inner core handle 5 is locked with the sleeve handle 1, the transverse force borne by the puncture inner core 4 is reduced, the possibility that the puncture inner core 4 shakes left and right on the inner core handle 5 is reduced as much as possible, and the service life of the device is prolonged.

In the process of using the device, the puncture inner core 4 is inserted into the hollow needle tube 2 to the designed position, and the inner core handle 5 and the sleeve tube handle 1 are locked. The needle head of the hollow needle tube 2 is aligned to a target vertebral body for puncture, after the lateral outlet 3 completely enters the vertebral body, the position of the lateral outlet 3 is observed under X rays, after the lateral outlet reaches the target position, the inner core handle 5 and the sleeve tube handle 1 are unlocked, the puncture inner core 4 is pulled out, the observation mark of the lateral outlet 3 is more obvious, whether the lateral outlet 3 is located at the target position or not is further determined, and whether the guide groove 8 is aligned to the target direction or not is further determined. After the puncture of the device is determined to be finished, the next operation is carried out.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A novel puncture needle is characterized in that: the device comprises a sleeve handle, wherein a hollow needle tube is arranged on the sleeve handle, and a lateral outlet is arranged at the far end of the hollow needle tube; a puncture inner core is arranged in the hollow needle tube, and the near end of the puncture inner core is rotatably connected with an inner core handle; the inner core handle is provided with a plurality of locking blocks, correspondingly, and the sleeve handle is provided with a plurality of locking grooves.

2. A novel puncture needle according to claim 1, characterized in that: the inner wall of the hollow needle tube is attached to the puncture inner core; the lateral outlet is provided with a guide groove, and the far end of the puncture inner core is attached to the guide groove.

3. A novel puncture needle according to claim 2, characterized in that: the diameter of the proximal end of the hollow part of the hollow needle tube is larger than that of the distal end; the diameter decreases gradually from the proximal end to the distal end.

4. A novel puncture needle according to claim 1, characterized in that: the puncture inner core is provided with a fixed platform which is arranged at the non-tail end position of the puncture inner core; correspondingly, the inner core handle is provided with a puncture inner core mounting groove.

5. A novel puncture needle according to claim 1, characterized in that: the inner core handle is provided with a plurality of inner core handle limiting rods, and correspondingly, the puncture inner core is provided with a plurality of puncture inner core limiting rods.

6. A novel puncture needle according to claim 1, characterized in that: the inner core handle is provided with two locking blocks which are corresponding to each other, and the sleeve handle is provided with two locking grooves.

7. A novel puncture needle according to claim 6, characterized in that: the locking block is provided with a plurality of limiting depressions corresponding to the limiting depressions, and the groove wall of the locking groove is provided with a plurality of limiting bulges.

8. A novel puncture needle according to claim 1, characterized in that: and a locking groove limiting block is arranged in the locking groove.

9. A novel puncture needle according to claim 1, characterized in that: the sleeve handle is provided with a sleeve handle limiting ring, and correspondingly, the inner core handle is provided with an inner core handle limiting ring.