CN113855264A

CN113855264A - Puncture location delivery device and puncture positioner

Info

Publication number: CN113855264A
Application number: CN202111183556.5A
Authority: CN
Inventors: 代长娟
Original assignee: Hunan Tuochuan Medical Technology Co ltd
Current assignee: Hunan Tuochuan Medical Technology Co ltd
Priority date: 2021-10-11
Filing date: 2021-10-11
Publication date: 2021-12-31

Abstract

The invention discloses a puncture positioning delivery device and a puncture positioning device. The push tube of the push rod is inserted into the needle tube from the near end of the needle tube handle of the guide needle, the positioning wire of the positioning piece penetrates through the needle tube from the far end and is led out from the near end of the push tube handle after being pushed by the positioning wire and elastically retracted into the needle tube, the push tube handle is operated to enable the push tube to move, the positioning hook can be pushed out of the needle tube to elastically stretch, and the reset elastic piece enables the push tube which pushes the positioning hook out of the needle tube to reset back into the needle tube. The puncture positioning device controls the distance of the pushing rod for pushing forward and returning relative to the guide needle through the matching of the limiting sliding groove and the limiting column between the needle tube handle and the push tube handle, so that the retraction and release states of the positioning hook are accurately controlled, the blind pushing effect is achieved, the positioning difficulty of the positioning piece is reduced, and the operation efficiency is improved.

Description

Puncture location delivery device and puncture positioner

Technical Field

The application belongs to the technical field of surgical instruments, and particularly relates to a puncture positioning delivery device for marking the position of a focus under the guidance of medical imaging equipment such as X-rays or ultrasound and a puncture positioning device adopting the puncture positioning delivery device.

Background

The incidence of breast cancer among women's cancers worldwide is the first of women's cancers. With the development of the image diagnosis technology, the early-stage breast lesions can be found more simply and more timely under the condition of breast fluoroscopy, and more breast nodules are screened. For larger breast nodules within the breast, the location of the breast nodule can be determined by visual observation and finger touch, and diagnosed and treated by needle biopsy or surgery. For smaller breast nodules, because the focus is too small, the focus can not be accurately positioned through visual observation and finger touch, so that the focus can not be accurately resected in a surgical operation, the operation is failed, or the resection amount of normal tissues is greatly increased, and the wound of a patient is increased.

Currently, in the surgical operation of excision of breast cancer focus, the search of breast nodules in the operation becomes a key factor for reducing damage and implementing breast protection operation. In the operation process, before the breast operation, a doctor in an ultrasonic department or an imaging department firstly performs puncture positioning on nodules, a positioning guide wire is placed at a breast focus, and then the surgeon accurately finds the focus according to the guide of the guide wire and cuts the focus, so that small incision operation is realized, and the cutting amount of normal tissues is greatly reduced. Based on the clinical requirements, various positioning parts appear in the market, no matter single-hook or double-hook products, the positioning operation marks are arranged on the positioning wires, and the positioning operation marks are pushed out to be elastically opened to be marked at the focus positions by referring to the needle tube or the needle handle to move relatively. However, these current pushing devices are inconvenient to operate, and require doctors to pay attention to the pushing position of the pushing rod and the retraction and release state of the positioning hook in the whole process, so that the positioning difficulty of the positioning piece is increased, and the operation efficiency is reduced.

Disclosure of Invention

The technical problem that this application will solve lies in, to the above-mentioned defect of prior art, provides one kind and can reach the puncture location delivery device and adopt this puncture location delivery device's puncture positioning device that the doctor "blindly pushed" effect in order to realize accurate location, improve operation efficiency.

This application provides a puncture location delivery device for solving its technical problem in the first aspect, including guide needle and push rod, the guide needle include the needle tubing and with the near-end fixed connection's of needle tubing handle, the push rod include push tube and with the push tube handle of the near-end fixed connection of push tube just the push tube is long in the needle tubing, the push tube of push rod inserts the needle tubing handle and then inserts in the needle tubing from the near-end of needle tubing handle, and the operation push tube handle makes the push tube can release the needle tubing with the setting element of receiving in the needle tubing along the distal end removal of needle tubing to the needle tubing, wherein:

the needle tube handle is also internally provided with a reset elastic piece, and two ends of the reset elastic piece in the elastic deformation direction are respectively abutted against the needle tube handle and the push tube handle so as to promote the push tube which pushes the positioning piece out of the needle tube to reset back into the needle tube under the elastic action of the reset elastic piece;

the needle tube handle and the ejector sleeve handle are provided with a limiting sliding groove extending along the moving direction of the ejector sleeve, the other one of the needle tube handle and the ejector sleeve handle is provided with a limiting column inserted into the limiting sliding groove, when the ejector sleeve handle is operated to enable the limiting column to slide to the far end position of the limiting sliding groove, the far end face of the ejector sleeve is located at the position where the positioning piece pushes out the needle tube, when the elastic force of the reset elastic piece drives the limiting column to slide to the near end position of the limiting sliding groove, the ejector sleeve resets and returns to the inside of the needle tube.

In an embodiment of the puncture positioning delivery device according to the first aspect of the present application, the return elastic element is a return spring, the distal end in the needle tube handle is provided with a spring limiting surface abutted to the distal end of the return spring, and the distal end of the push tube handle inserted into the needle tube handle forms a conical surface abutted to the proximal end of the return spring.

In one embodiment of the puncture positioning and delivering device according to the first aspect of the present application, the needle tube handle has a proximal end provided with an open chute extending from a proximal end surface to a distal end and penetrating through the inner and outer walls, and a position offset from the open chute is provided with a position-limiting chute penetrating through the inner and outer walls; the periphery of the near end of the push tube handle is provided with an operation button which is just in slip insertion into the open type sliding groove when the push tube handle is inserted into the needle tube handle and a limit column which is just in slip insertion into the limit sliding groove.

In an embodiment of the puncture positioning and delivering device according to the first aspect of the present application, the proximal end of the needle tube handle is provided with two open chutes and two limit chutes, the two open chutes are respectively disposed at two opposite sides of the needle tube handle in a first direction, and the two limit chutes are respectively disposed at two opposite sides of the needle tube handle in a second direction perpendicular to the first direction; the near end of the push tube handle is correspondingly provided with two operating buttons which are respectively arranged on two opposite sides in the first direction and two limiting columns which are respectively arranged on two opposite sides in the second direction.

In an embodiment of the puncture positioning and delivering device according to the first aspect of the present application, the inner wall of the proximal end of the needle tube handle corresponding to the limiting sliding groove is further formed with a guiding groove extending from the end surface of the proximal end to the proximal end of the limiting sliding groove for guiding the limiting post on the push tube handle to be slidably inserted into the limiting sliding groove.

In an embodiment of the puncture positioning and delivering device according to the first aspect of the present application, the proximal outer wall of the needle tube handle is further provided with a first operation mark and a second operation mark at the proximal position and the distal position of the limiting chute, respectively.

In an embodiment of the puncture positioning and delivering device according to the first aspect of the present application, the proximal end of the needle tube handle is further fastened with a tail cap, the tail cap is opposite to two open chutes on the needle tube handle and protrudes distally with two clamping strips, and each clamping strip forms a mutually matched protrusion and groove with the opposite inner wall of the open chute to realize a buckle.

In an embodiment of the puncture positioning and delivering device according to the first aspect of the present application, a detachable limiting structure for limiting the forward pushing of the push tube handle is further disposed between the needle tube handle and the push tube handle.

In an embodiment of the puncture positioning and delivering device according to the first aspect of the present application, the limiting structure is a limiting buckle, the limiting buckle has a connecting sheet capable of wrapping a part of the periphery between two open type chutes formed at the proximal end of the needle tube handle, and two operating handles are respectively connected to two opposite sides of the connecting sheet, and a buckle extends transversely from the lower end of each operating handle; when the limiting buckle is wrapped on the needle tube handle through the connecting sheet to enable the buckles on the two sides to be clamped into the corresponding open type sliding grooves, the far ends of the buckles abut against the far ends of the open type sliding grooves to limit the limiting buckle to be pushed forwards, and the near ends of the limiting buckle abut against the operating button on the push tube handle to limit the push tube handle to be pushed forwards.

The application provides a puncture positioner in the second aspect for solving its technical problem, deliver the device including aforementioned puncture location, still including receive in needle tubing distal end and push away the setting element between the pipe distal end in puncture location delivery device's the needle tubing, the setting element has at least one elastic shrinkage and supports the elastic positioning hook of needle tubing inner wall, and operation push away the pipe handle and make the push away the pipe when removing the needle tubing with the setting element release needle tubing along the needle tubing, the elastic positioning hook elasticity of setting element opens.

In an embodiment of the puncture positioning device according to the second aspect of the present application, a positioning wire is connected to the proximal end of the positioning member, and the positioning wire is led out from the proximal end of the push tube handle after passing through the push tube from the distal end of the push tube.

The puncture positioning delivery device and the puncture positioning device have the following beneficial effects: according to this application embodiment's puncture location delivery device and puncture positioner who adopts this puncture location delivery device, realize the automatic re-setting of propelling movement pole for the guide needle back-push through the elastic component that resets, cooperation through spacing spout and spacing post between needle tubing handle and the ejector sleeve handle, the distance that the control propelling movement pole pushed forward and rolled back for the guide needle, thereby realize the income of elastic positioning hook and the accurate control of release state, reach the effect that "blind pushes away", need not the user and pay close attention to the elastic positioning hook state at the operation in-process, reduce the location degree of difficulty of setting element, improve operation efficiency.

Drawings

The present application will be further described with reference to the accompanying drawings and examples, in which:

FIG. 1 is a schematic view of an assembled configuration of a lancing positioning device according to one embodiment of the present application;

FIG. 2 is a schematic view of the puncture positioning device shown in FIG. 1 in an exploded configuration;

FIG. 3 is a schematic structural view of an introducer needle according to one embodiment of the present application;

FIG. 4 is a schematic view of the assembly of the guide pin insertion push rod of FIG. 3;

FIG. 5 is a cross-sectional view of the lancing positioning device of one embodiment of the present application in a first use configuration;

FIG. 6 is a schematic view of the positioning member of the lancing positioning device of FIG. 5 being retracted into the needle cannula;

FIG. 7 is a schematic view of the lancing positioning device of FIG. 5 in a second use configuration;

FIG. 8 is a schematic structural view of a lancing positioning device according to another embodiment of the present application;

fig. 9 is a schematic structural view of the spacing buckle in fig. 8.

In the figure: 1. a guide pin; 11. a needle tube; 111. a needle tip; 12. a needle tube handle; 121. a limiting lug; 122. an open type chute; 122a, a groove; 123. a limiting chute; 123a, a first operation mark; 123b, a second operation mark; 124. a tail cover; 1241. a first cylinder; 1242. a second cylinder; 1243. clamping the strip; 1244. the clamping strip is protruded; 125. a needle tip indicator; 126. anti-slip strips; 127. a guide groove; 128. a spring limiting surface; 129. a central bore;

2. a push rod; 21. pushing the tube; 211. a distal end face; 22. a push tube handle; 221. an operating button; 222. a limiting column; 223. a conical surface;

3. a return spring; 4. a positioning member; 41. an elastic positioning hook; 42. positioning wires; 411. an elastic hook;

5. a limit buckle; 51. connecting sheets; 52a, a first operating handle; 52b, a second operating handle; 53a, a first deformation shaft; 53b, a second deformation shaft; 54a, a first anti-rotation limiting surface; 54b and a second anti-rotation limiting surface; 55a, a first buckle; 55b and a second buckle.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application. Also, the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

According to a general technical concept of the present invention, as shown in fig. 1 to 9, a puncture location delivery device and a puncture location device are provided, and fig. 1 and 2 respectively show an overall and exploded structural schematic view of a puncture location device according to an embodiment of the present application. As shown in fig. 1 and 2, the puncture positioning device mainly comprises a guide needle 1, a push rod 2, a return spring 3 and a positioning member 4. Wherein, the guide needle 1, the push rod 2 and the return spring 3 constitute a puncture positioning delivery device for delivering the positioning member 4 to a target position. Referring specifically to fig. 2, the introducer needle 1 has a needle tube 11 and a needle tube handle 12, a distal end of the needle tube 11 forms a needle tip 111, a proximal end of the needle tube 11 is fixedly connected to a distal end of the needle tube handle 12, and a return spring 3 is accommodated in the needle tube handle 12. The push rod 2 is provided with a push tube 21 and a push tube handle 22, the push tube 21 is longer than the needle tube 11 of the guide needle 1, the far end of the push tube 21 forms a far end face 211, and the near end of the push tube 21 is fixedly connected with the far end of the push tube handle 22. The positioning member 4 has an elastic positioning hook 41 and a positioning wire 42, the positioning wire 42 is connected with the proximal end of the elastic positioning hook 41, two elastic hooks 411 are formed at the distal end of the elastic positioning hook 41, and the proximal end of the elastic positioning hook 41 is larger than or equal to the outer diameter of the push tube 21. During assembly, the return spring 3 is installed in the needle tube handle 12 of the guide needle 1, the push tube 21 of the push rod 2 is inserted into the needle tube handle 12 from the proximal end of the needle tube handle 12 and then inserted into the needle tube 11 through the return spring 3, both ends of the return spring 3 in the elastic deformation direction are respectively abutted with the spring limit surface 128 at the distal end in the needle tube handle 12 and the distal end conical surface 223 of the push tube handle 22, and the distal end surface 211 of the push tube 21 has a certain distance L (see fig. 5) from the needle tip 111 in the needle tube 11 for accommodating the elastic positioning hook 41 (see fig. 6) of the positioning member 4. The positioning wire 42 of the positioning element 4 penetrates the needle tube 11 from the needle point 111 at the distal end of the needle tube 11, then passes through the push tube 21 inserted into the needle tube 11, and then is led out from the proximal end of the push tube handle 22, and then the positioning wire 42 is continuously pulled backwards to enable the two elastic hooks 411 of the elastic positioning hook 41 to elastically retract and to be accommodated in a space between the needle point 111 and the push tube end face 211 in the needle tube 11, and the elastic hooks 411 abut against the inner wall of the needle tube 11 through elastic force of elastic contraction and cannot move. The pushing handle 22 is operated to push forward, so that the pushing tube 21 moves along the needle tube 11, and the distal end surface 211 of the pushing tube 21 can push the elastic positioning hook 41 out of the needle tube 11 to elastically open and mark at the target position. During the process of pushing the pushing handle 22 forward, the return spring 3 is continuously compressed, so that after the operation of the pushing handle 22 is released, the return elastic force of the return spring 3 can drive the pushing handle 22 to return, so that the distal end surface 211 of the pushing tube 21 is retracted to the initial position in the needle tube 11. In order to control the forward and backward moving distance of the pushing rod 2 relative to the guide needle 1 to accurately realize the retraction and release of the elastic positioning hook 41, a limit chute 123 and a limit post 222 which are matched with each other are further arranged between the needle tube handle 12 and the pushing tube handle 22, when the pushing tube handle 22 is operated to enable the limit post 222 to slide to the far end position of the limit chute 123, the far end face 211 of the pushing tube 21 is just positioned at the position of pushing the elastic positioning hook 41 out of the needle tube 11, and when the elastic force of the return spring 3 drives the limit post 222 to slide to the near end position of the limit chute 123, the pushing tube 21 is just reset back to the needle tube 11.

Specifically, as shown in fig. 3, the needle tube 11 of the introducer needle 1 is made of metal, preferably stainless steel, the distal end of the needle tube 11 is provided with a needle tip 111, and the angle a (shown in fig. 6) between the needle tip 111 and the horizontal plane is preferably less than 45 °. The needle tube 11 is marked with a graduated scale 112 on the periphery, the graduated scale 112 can be divided at intervals of 0.5-1 cm, and 5cm times of graduated lines are obviously different from other graduated lines. In a specific implementation, the graduated scale 112 may be fixed on the needle tube 11 of the guide needle 1 by laser marking, ink, coating, or the like. The proximal end of the needle tube 11 is fixedly connected with a needle tube handle 12.

As shown in FIG. 3, the distal end of the needle tube handle 12 is provided with a needle point indicator 125 for indicating the direction of the inclined plane of the needle point 111 of the needle tube 11, so as to facilitate the puncturing operation by the doctor. As shown in FIG. 3, the tip indicator 125 is a protrusion opposite the bevel of the tip 111. The proximal end of the needle tube handle 12 opposite to the upper and lower sides of the inclined plane of the needle tip 111 is respectively provided with an open chute 122 extending from the proximal end surface to the distal end, and the open chute 122 penetrates through the inner and outer walls of the needle tube handle 12 and is used for guiding the push tube handle 22 of the push rod 2 to be inserted into the needle tube handle 12 in cooperation with an operation button 221 arranged corresponding to the proximal end periphery of the push tube handle 22 of the push rod 2. The proximal end of the needle tube handle 12 is further provided with a stopper chute 123 penetrating the inner and outer walls on the left and right sides staggered from the open chute 122, respectively, for cooperating with a stopper column 222 provided on the proximal end periphery of the push tube handle 22 of the push rod 2 to restrict the forward and backward movement distances of the push tube handle 22 of the push rod 2 with respect to the needle tube handle 12. The outer wall of the needle tube handle 12 is further provided with a first operation mark 123a and a second operation mark 123b corresponding to the proximal end position and the distal end position of the limit chute 123. The proximal end of the needle cannula handle 12 also engages a tail cap 124. As shown in FIG. 3, the tail cap 124 has a first cylinder 1241 and a second cylinder 1242 protruding distally, the diameter of the second cylinder 1242 being smaller than that of the first cylinder 1241, the second cylinder 1242 being adapted to be inserted into the push tube handle 22, and the first cylinder 1241 being adapted to be inserted into the needle cannula handle 12. The tail cap 124 also has two clamping strips 1243 protruding towards the far end opposite to the two open chutes 122 on the needle tube handle 12, and the left and right sides of each clamping strip 1243 are respectively provided with a clamping strip protrusion 1244. When the tail cap 124 is connected to the needle tube handle 12, the first cylinder 1241 and the second cylinder 1242 are inserted into the needle tube handle 12 and the push tube handle 22, respectively, and then the two clamping strips 1243 are inserted into the two open type sliding slots 122 aligned on the needle tube handle 12, so that the clamping strip protrusions 1244 at the two sides of the clamping strips 1243 are clamped into the grooves 122a formed on the opposite inner walls of the open type sliding slots 122, and the tail cap 124 can be fastened to the proximal end portion of the needle tube handle 12. The tail cap 124 can be removed by forcibly removing the clip strip protrusions 1244 at both sides of the clip strip 1243 from the groove 122a in the open type chute 122. The tail cap 124 and the needle cannula handle 12 may be assembled by interference fit or threaded connection according to various embodiments of the present application, and are not limited to the illustrated embodiments.

As shown in fig. 2, the pushing rod 2 is composed of a pushing tube 21 and a pushing tube handle 22, and is inserted into the guiding needle 1 to push the elastic positioning hook 41 of the positioning member 4. The push tube 21 may be made of metal, preferably stainless steel, and the distal end surface 211 of the push tube 21 facilitates pushing the elastic positioning hook 41. The proximal end of the push tube 21 is fixedly connected to the distal end of the push tube handle 22. The distal end of the push tube handle 22 forms a conical surface 223 for abutment with the proximal end of the return spring 3. The proximal end periphery of the push tube handle 22 is provided with two operation buttons 221 corresponding to the two open chutes 122 on the needle tube handle 12, and two limit posts 222 corresponding to the two limit chutes 123 on the needle tube handle 12. When the push tube handle 22 is inserted into the proximal end of the needle tube handle 12 (see fig. 4), the operation button 221 on the push tube handle 22 is opposite to the open slide groove 122 on the needle tube handle 12 and is slidably inserted into the open slide groove 122, the limit post 222 on the push tube handle 22 first enters the guide groove 127 formed on the inner wall of the proximal end of the needle tube handle 12 corresponding to the limit slide groove 123 and extending from the proximal end surface to the proximal end of the limit slide groove 123, and is slidably inserted into the limit slide groove 123 through the elastic deformation brought by the open slide groove 122 under the guide of the guide groove 127. The position-limiting post 222 of the push tube handle 22 can slide freely in the position-limiting sliding groove 123 of the needle tube handle 12, and the operation button 221 of the push tube handle 22 can slide freely in the open sliding groove 122 of the needle tube handle 12. However, when the operation button 221 of the push tube handle 22 is operated to slide the position-limiting post 222 on the push tube handle 22 to the distal end position of the position-limiting sliding groove 123, it is blocked by the distal end of the position-limiting sliding groove 123 and cannot move forward (see fig. 7), at this time, the return spring 3 is compressed, and the distal end surface 211 of the push tube 21 just pushes out the elastic positioning hook 41 housed in the needle tube 11. Then, the operation of the operation button 221 of the push tube handle 22 is released, the push tube handle 22 can be pushed back by the elastic force of the return spring 3, and the limit post 222 is driven to slide to the proximal end position of the limit sliding groove 123 along the limit sliding groove 123, and is blocked by the proximal end of the limit sliding groove 123 and cannot move backwards continuously (see fig. 5), at this time, the push tube 21 is just reset back into the needle tube 11, and has a predetermined distance L from the needle tip 111 for accommodating the elastic positioning hook 41 of the positioning element 4.

The puncture positioning device according to the above embodiment of the present application is specifically used as follows:

the first step is preassembly. Taking down the tail cap 124 at the proximal end of the needle tube handle 12 of the guide needle 1, holding the operation button 221 of the push tube handle 22, inserting the push tube 21 of the push rod 2 into the needle tube handle 12 from the proximal end of the needle tube handle 12 and further inserting the push tube into the needle tube 11 through the reset spring 3 and the central hole 129 on the spring limiting surface 128, the operation button 221 on the push tube handle 22 is slidably inserted into the open chute 122 on the needle tube handle 12, the limiting post 222 on the push tube handle 22 is slidably inserted into the limiting chute 123 on the needle tube handle 12 until the limiting post 222 on the push tube handle 22 abuts against the distal end position of the limiting chute 123, and at this time, the distal end surface 211 of the push tube 21 is exposed from the needle tip 111 of the needle tube 11 of the guide needle 1 (see fig. 7); then the positioning wire 42 of the positioning piece 4 is inserted from the far end of the push tube 21 and extends to the outside of the push rod 2 through the push tube 21 and the push tube handle 22; then the operation button 221 on the push tube handle 22 is released, the push rod 2 automatically resets under the action of the return spring 3 until the limit post 222 on the push tube handle 22 of the push rod 2 slides in the limit chute 123 on the needle tube handle 12 to the proximal end position of the limit chute 123, at this time, the distal end of the push tube 21 just resets to return to the elastic positioning hook 41 (shown in fig. 5) which is in the needle tube 11 and has a predetermined distance L with the needle point 111 and is used for accommodating the positioning element 4; the elastic positioning hook 41 is elastically retracted into the needle tube 11 of the guide needle 1 by pulling the positioning wire 42 extending to the outside of the push rod 2 (see fig. 6), and the positioning wire 42 extending to the outside of the push rod 2 is retracted into the push tube handle 22 of the push rod 2 and then the tail cap 124 of the needle tube handle 12 is capped. Thus, the retainer 4 is accommodated in the guide needle 1, and is pressed against the inner wall of the needle tube 11 by the elastic force of the elastic positioning hook 41 so as not to move, thereby completing the pre-assembly of the puncture positioning device.

The second step is followed by a puncture location operation. The doctor holds the needle tube handle 12 of the puncture positioning device and pierces the needle tube 11 into the target position with the aid of the ultrasonic image. A needle tip indicator 125 disposed on the needle cannula handle 12 indicates to the clinician the direction of the bevel of the needle tip 111 of the needle cannula 11. The needle tube handle 12 is further provided with an anti-slip strip 126 and a limiting ear 121 (see fig. 3), the anti-slip strip 126 plays an anti-slip role when being used by an operator, and the limiting ear 121 is used for standardizing the holding position of the operator, so that the interference with the push rod 2 when being used is avoided, and the push rod 2 is prevented from being mistakenly moved. Then, the push rod 2 is pushed forward relative to the guide needle 1 by holding the operation button 221 of the push handle 22, so that the stopper post 222 on the push handle 22 of the push rod 2 slides to the distal end position of the stopper slide groove 123 on the needle tube handle 12, at this time, the push tube 21 pushes out the elastic positioning hook 41 of the positioning member 4 accommodated in the needle tube 11 from the needle point 111, the elastic positioning hook 41 is in a completely released state, and the two elastic hooks 411 of the elastic positioning hook 41 prick into the target. Then, the operation button 221 of the push tube handle 22 is released, the push rod 2 is reset under the action of the reset spring 3, the limit post 222 returns to the proximal end position of the limit chute 123, the push tube 21 also returns to the needle tube 11, the guide needle 1 is withdrawn, and the positioning piece 4 is separated under the action of the elastic positioning hook 41 to realize positioning.

As mentioned above, the outer wall of the needle tube handle 12 is provided with the first operation mark 123a and the second operation mark 123b corresponding to the proximal end position and the distal end position of the position-limiting sliding groove 123, respectively, so that the doctor can know the state of the elastic positioning hook 41 of the positioning member 4 by observing whether the position-limiting post 222 on the push tube handle 22 is located at the first operation mark 123a or the second operation mark 123 b. That is, when the position restricting column 222 is located at the first operation mark 123a, the elastic positioning hook 41 is received in the needle tube 11 of the guide needle 1; when the stopper 222 is located at the second operation mark 123b, the elastic positioning hook 41 has finished releasing the penetration target. The limiting sliding chute 123 on the needle tube handle 12 limits the movement of the pushing rod 2 within a certain range, and the movement limiting positions of the limiting sliding chute correspond to the first operation mark 123a and the second operation mark 123b respectively, so that the operation is simpler and more effective, and a doctor does not need to pay attention to the state of the elastic positioning hook 41 in the operation process, thereby achieving the effect of 'blind pushing'.

The positioning member 4 in the illustrated embodiment of the present application is composed of an elastic positioning hook 41 and a positioning wire 42, two elastic hooks 411 are formed at the distal end of the elastic positioning hook 41, a wire hole 412 is formed at the proximal end of the elastic positioning hook 41, the positioning wire 42 passes through the wire hole 412 to be connected with the elastic positioning hook 41, and after the elastic positioning hook 41 is pricked into a target, the positioning wire 42 can be separated from the elastic positioning hook 41 as required to leave the elastic positioning hook 41 at the target position. According to different embodiments of the present application, the elastic positioning hook 41 is made of metal, preferably memory alloy or elastic material, the elastic hook 411 disposed thereon may be a single hook, a double hook or a plurality of hooks, the connection manner may be various suitable manners such as sleeving, welding, knitting, gluing, spiral winding, cross zigzag, and the like, and the hooks may be rounded hook needles, bent hook needles or broken line hook needles. The elastic positioning hook 41 and the positioning wire 42 can be connected in an integral structure, a wire hole connection mode, a spiral winding mode or a welding mode. The positioning wire 42 may be a metal material or a flexible material, preferably a polymer wire.

The puncture positioning device of the above embodiment of the present application realizes the retraction and return of the pushing rod 2 after being pushed forward by the return spring 3 arranged in the needle tube handle 12. The return spring 3 is made of an elastic material, preferably a metal material having elasticity, and the return spring 3 functions as an elastic return function. According to different embodiments of the present application, the return spring 3 may also be replaced by other suitable return elastic members, such as a plastic elastic sheet structure, a rubber component, etc., and two ends of the return elastic member in the elastic deformation direction respectively abut against the needle tube handle 12 and the push tube handle 22.

In another embodiment of the present application, in order to avoid the malfunction of the puncturing and positioning device when not in use, a detachable limiting structure for limiting the forward pushing of the pushing tube handle 22 is further provided between the needle tube handle 12 and the pushing tube handle 22. The spacing structure may be the spacing clip 5 shown in fig. 8 and 9. Referring to fig. 8 and 9, the stopper buckle 5 is mainly composed of a connecting piece 51, a first operating handle 52a and a second operating handle 52 b. The connecting plate 51 can wrap part of the periphery between the two open chutes 122 formed at the proximal end of the needle tube handle 12, the two operating handles are connected to the two opposite sides of the connecting plate 51 through the first deforming shaft 53a and the second deforming shaft 53b, respectively, and the thickness of the first deforming shaft 53a and the second deforming shaft 53b is smaller than that of the first operating handle 52a and the second operating handle 52 b. The lower ends of the two operating handles extend transversely and oppositely to form a first buckle 55a and a second buckle 55 b. When the limit buckle 5 is wrapped on the needle tube handle 12 through the connecting sheet 51, the first buckle 55a and the second buckle 55b can be respectively clamped into the open type sliding grooves 122 at the two sides of the needle tube handle 12 through elastic deformation, the far ends of the first buckle 55a and the second buckle 55b are propped against the far ends of the open type sliding grooves 122 to limit the limit buckle 5 to be pushed forward, and the near end of the limit buckle 5 is propped against the operating button 221 on the push tube handle 22 to limit the push tube handle 22 to be pushed forward. Furthermore, the opposite inner sides of the connecting sheet 51 are provided with a first anti-rotation limiting surface 54a and a second anti-rotation limiting surface 54b which are jointed with the needle tube handle 12, so that the rotation and the disengagement of the limit buckle 5 can be prevented. Before using the puncture positioning device, the operator inwardly presses and pinches the first operating handle 52a and the second operating handle 52b to make the first buckle 55a and the second buckle 55b disengage from the open-type chute 122, so that the limit buckle 5 can be removed and the limit of the push pipe handle 22 can be released.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. The utility model provides a puncture location delivery device, includes guide needle (1) and push rod (2), guide needle (1) include needle tubing (11) and with needle tubing (11) the near-end fixed connection's needle tubing handle (12), push rod (2) including push tube (21) and with push tube (21) the near-end fixed connection's push tube handle (22), just push tube (21) are long in needle tubing (11), push tube (21) of push rod (2) insert needle tubing handle (12) and then insert needle tubing (11) from the near-end of needle tubing handle (12) in, operation push tube handle (22) make push tube (21) along needle tubing (11) to the distal end removal of needle tubing (11) can be with pushing out needle tubing (11) locating piece (4) of receiving in needle tubing (11), its characterized in that:

the needle tube handle (12) is internally provided with a reset elastic piece, and two ends of the reset elastic piece in the elastic deformation direction are respectively abutted against the needle tube handle (12) and the push tube handle (22) and used for resetting the push tube (21) after the positioning piece (4) pushes out of the needle tube (11) into the needle tube (11) under the elastic action of the reset elastic piece;

needle tubing handle (12) and ejector sleeve handle (22) two offer along ejector sleeve (21) moving direction extension spacing spout (123), and the other is then equipped with and inserts spacing post (222) in spacing spout (123), when operation ejector sleeve handle (22) made spacing post (222) slide to the distal end position of spacing spout (123), distal end terminal surface (211) of ejector sleeve (21) are located the position that releases needle tubing (11) with setting element (4), when the elasticity of the elastic component that resets drove spacing post (222) and slide to the proximal end position of spacing spout (123), ejector sleeve (21) reset back to in needle tubing (11).

2. The puncture positioning and delivery device according to claim 1, wherein the return elastic member is a return spring (3), the distal end of the needle tube handle (12) is provided with a spring limiting surface (128) abutting against the distal end of the return spring (3), and the distal end of the push tube handle (22) inserted into the needle tube handle (12) forms a conical surface (223) abutting against the proximal end of the return spring (3).

3. A puncture positioning and delivery device according to claim 1, wherein the needle tube handle (12) has an open slide groove (122) formed at a proximal end thereof and extending from a proximal end surface to a distal end thereof, the open slide groove extending through the inner and outer walls, and a stopper slide groove (123) formed at a position offset from the open slide groove (122) and extending through the inner and outer walls; the periphery of the near end of the push tube handle (22) is provided with an operation button (221) which is just inserted into the open type sliding groove (122) in a sliding manner when the push tube handle (22) is inserted into the needle tube handle (12) and a limit column (222) which is just inserted into the limit sliding groove (123) in a sliding manner.

4. A puncture positioning and delivery device according to claim 3, wherein the needle tube handle (12) has two open chutes (122) and two limit chutes (123) formed at the proximal end thereof, the two open chutes (122) are respectively disposed at two opposite sides of the needle tube handle (12) in a first direction, and the two limit chutes (123) are respectively disposed at two opposite sides of the needle tube handle (12) in a second direction perpendicular to the first direction;

the near end of the push tube handle (22) is correspondingly provided with two operating buttons (221) which are respectively arranged on two opposite sides in the first direction and two limiting columns (222) which are respectively arranged on two opposite sides in the second direction.

5. The puncture location delivery device according to claim 3, wherein the inner wall of the proximal end of the needle tube handle (12) corresponding to the limit chute (123) is further formed with a guide groove (127) extending from the end face of the proximal end to the proximal end of the limit chute (123) to guide the limit post (222) on the push tube handle (22) to be slidingly inserted into the limit chute (123).

6. A puncture positioning delivery device according to claim 3, wherein the outer wall of the proximal end of the needle tube handle (12) is further provided with a first operation mark (123a) and a second operation mark (123b) at the proximal end position and the distal end position of the limit chute (123), respectively.

7. A puncture positioning and delivery device according to claim 4, wherein the proximal end of the needle tube handle (12) is further engaged with a tail cap (124), the tail cap (124) is opposite to two open chutes (122) on the needle tube handle (12) and protrudes distally with two clamping strips (1243), each clamping strip (1243) and the opposite inner walls of the open chutes (122) form mutually matched protrusions and grooves (122a) for realizing the engagement.

8. The puncture location delivery device according to claim 1, wherein a detachable limiting structure for limiting the forward pushing of the push tube handle (22) is further provided between the needle tube handle (12) and the push tube handle (22).

9. The puncture positioning and delivery device according to claim 8, wherein the limiting structure is a limiting buckle (5), the limiting buckle (5) is provided with a connecting piece (51) which can wrap part of the periphery between two open type sliding grooves (122) arranged at the proximal end of the needle tube handle (12), and an operating handle is respectively connected to two opposite sides of the connecting piece (51), and a buckle transversely extends from the lower end of each operating handle; when the limiting buckle (5) is wrapped on the needle tube handle (12) through the connecting sheet (51) to enable the buckles on the two sides to be clamped into the corresponding open type sliding grooves (122), the far ends of the buckles abut against the far ends of the open type sliding grooves (122) to limit the limiting buckle (5) to be pushed forwards, and the near ends of the limiting buckle (5) abut against the operation buttons (221) on the push tube handle (22) to limit the push tube handle (22) to be pushed forwards.

10. A puncture positioning device, comprising the puncture positioning delivery device according to any one of claims 1 to 9, and further comprising a positioning member (4) received in the needle tube (11) of the puncture positioning delivery device and located between the distal end of the needle tube (11) and the distal end of the push tube (21), wherein the positioning member (4) has at least one elastic positioning hook (41) elastically contracting to abut against the inner wall of the needle tube (11), and when the push tube handle (22) is operated to move the push tube (21) along the needle tube (11) to push the positioning member (4) out of the needle tube (11), the elastic positioning hook (41) of the positioning member (4) elastically expands.

11. The puncture positioning device according to claim 10, wherein a positioning wire (42) is connected to the proximal end of the positioning member (4), and the positioning wire (42) is led out from the proximal end of the push tube handle (22) after passing through the push tube (21) from the distal end of the push tube (21).