CN221963695U - A flexible pjncture needle for mammary gland location - Google Patents

Abstract

The application relates to a flexible puncture needle for mammary gland positioning, which comprises a positioning wire assembly and a guide needle assembly, wherein the positioning wire assembly consists of a positioning hook and a positioning wire, the guide needle assembly comprises a puncture needle tube, a guide needle handle and a push rod, the puncture needle tube is sleeved outside the positioning wire assembly, the push rod is arranged in the puncture needle tube, the distal end of the push rod is abutted with the proximal end of the positioning hook and is used for pushing the positioning hook out of the puncture needle tube, the positioning wire is flexible, the positioning hook comprises a marking sleeve, a fixed guide wire, a depth prompt sleeve and an anchoring guide wire, the anchoring guide wire comprises a straight section and a bending section, the marking sleeve and the depth prompt sleeve are sleeved on the straight section of the anchoring guide wire, the marking sleeve is fixed at the proximal end of the bending section, the depth prompt sleeve is fixed at the proximal end part of the straight section, the fixed guide wire is used for fixing the anchoring guide wire in the marking sleeve, and the flexible puncture needle has good developing property and strong anchoring force.

Description

A flexible puncture needle for breast positioning

Technical Field

The utility model relates to the field of medical instruments, in particular to a flexible puncture needle for breast positioning.

Background Art

In recent years, with the improvement of comprehensive diagnosis and treatment of breast cancer in my country, the survival rate of breast cancer has increased year by year, and the early diagnosis rate of breast cancer has been improved through breast cancer screening. Breast cancer screening is an important measure to improve the prognosis of breast cancer and reduce the mortality rate of breast cancer. In clinical application, breast lesions are often small and clinical physicians are negative on palpation, which can easily delay treatment. In addition, smaller breast lesions are not easy to find, which can easily lead to difficulties in surgical treatment and false negative results in pathological sampling. In response to this situation, breast localization needles came into being. The breast localization needle performs lesion puncture under the guidance of ultrasound or X-ray, and leaves a guide wire at the lesion site to guide surgeons to perform surgical resection or pathological examination of suspected malignant lesions. Under the guidance of imaging, puncture localization has high safety, accuracy and clinical application value. This positioning method can remove small benign breast lesions. It is a high-level diagnostic method in the early diagnosis of breast cancer.

The anchor hooks of existing puncture needles are mostly made of rigid materials, such as twisted double-strand stainless steel wire. The positioning hook is wide, the surgical incision is large, and it is easy to get unhooked due to insufficient anchoring force, causing secondary damage to the human body. When the product is used, the guide wire made of double-strand stainless steel wire needs to be put into the puncture needle tube. The stainless steel wire does not have a memory function, and after being put into the puncture needle tube, the guide wire will be deformed and the anchoring force will decrease. Moreover, the positioning wires in the prior art are also mostly rigid, and the positioning wires exposed outside the body will cause great pain and psychological pressure on the patient.

Patent CN 204863412U discloses a new type of lung tumor localization needle, including a puncture needle, which is composed of a puncture needle sleeve and a puncture needle handle, and also includes an anchoring positioning needle, a positioning line and a pushing device, the pushing device includes a push tube and a push tube handle, the push tube is placed in the puncture needle sleeve, the distal end of the push tube is against the proximal end of the anchoring positioning needle, the proximal width of the anchoring positioning needle is greater than or equal to the outer diameter of the push tube, the distal end of the positioning line is connected to the proximal end of the anchoring positioning needle, the positioning line extends from the lumen of the push tube to the outside of the pushing device, and the distal part of the positioning line is provided with a plurality of ribbons of different colors, each of which has a length of 3mm to 15mm. This technology uses nickel-titanium alloy as the anchoring positioning needle (guide wire) material, which solves the problem that the existing stainless steel guide wire has insufficient anchoring force and needs to be put into the puncture needle tube when used, resulting in deformation. Nickel-titanium alloy has a memory function. When in use, the anchoring needle can be put into the puncture needle tube and restore its shape after release, which does not affect the anchoring force. However, the anchoring needle of this product has poor visualization, and the ribbon cannot be visualized under X-ray or ultrasound, and does not have an auxiliary positioning function. When in use, multiple ribbons of different colors are easily contaminated by tissue fluid or blood, resulting in the inability to distinguish specific colors and the inability to measure the positioning depth. In addition, the ribbon has the risk of fading during use, and has poor biological safety.

Summary of the invention

In order to overcome the defects in the prior art, the utility model designs a flexible puncture needle with good developing property and strong anchoring force.

The purpose of this application is achieved through the following technical solutions:

A flexible puncture needle for breast positioning, comprising a positioning wire assembly and a guide needle assembly, wherein the positioning wire assembly is composed of a positioning hook and a positioning wire, the proximal end of the positioning hook is fixedly connected to the distal end of the positioning wire, the guide needle assembly comprises a puncture needle tube, a guide needle handle and a push rod, the proximal end of the puncture needle tube is fixedly connected to the guide needle handle, the puncture needle tube is sleeved outside the positioning wire assembly, the push rod is arranged in the puncture needle tube, the distal end of the push rod abuts against the proximal end of the positioning hook, and is used for The positioning hook is pushed out of the puncture needle tube. The positioning wire is flexible. The positioning hook includes a marking sleeve, a fixed guide wire, a depth indication sleeve and an anchoring guide wire. The anchoring guide wire includes a straight section and a curved section. The marking sleeve and the depth indication sleeve are sleeved on the straight section of the anchoring guide wire. The marking sleeve is fixed at the proximal end of the curved section. The depth indication sleeve is fixed at the proximal end of the straight section. The fixed guide wire is used to fix the anchoring guide wire in the marking sleeve.

The purpose of this application can be further achieved through the following technical solutions:

In one embodiment, the anchoring guide wire is formed by folding a shape memory alloy wire in half to form a bend at the proximal end and two free ends at the distal end. The distal end of the folded anchoring guide wire is heat-formed into the curved section, and the proximal end of the folded anchoring guide wire is divided into the straight section.

In a preferred embodiment, the curved section of the anchoring guide wire after being folded in half is two symmetrical anchoring hook wires. More preferably,

In a preferred embodiment, the positioning wire is fixedly connected to the anchoring guide wire at the bend by knotting or glue dripping.

In a preferred embodiment, the fixed guide wire is folded in half, and the proximal end of the folded fixed guide wire is entangled and knotted with the anchoring guide wire to form a fixed guide wire knot, and the distal end of the folded fixed guide wire is inserted into the marking sleeve, and is arranged in a cross-shaped structure with the anchoring guide wire on the cross section of the marking sleeve, and the fixed guide wire and the anchoring guide wire are connected to the marking sleeve by interference fit.

In a preferred embodiment, the plane where the fixed guide wire knot is located is perpendicular to the plane where the bend is located.

In a preferred embodiment, the length of the marking sleeve is 3-10 mm, preferably 5 mm.

In one embodiment, a buckle is provided at the distal end of the introducer needle assembly.

In one embodiment, a button is provided on the guide needle handle, and the button is fixedly connected to the push rod, and the positioning wire assembly is released by moving the button.

In one embodiment, the push rod is hollow in design, and the proximal end of the positioning wire passes through the cavity of the push rod and extends outside the proximal end of the push rod.

In a preferred embodiment, the proximal end of the push rod is fixedly connected to a push rod handle.

In one embodiment, a needle tip is provided at the distal end of the puncture needle tube, and scale lines are provided on the tube body of the puncture needle tube.

Compared with the prior art, the utility model has the following advantages:

1. The flexible puncture needle for breast positioning of the present application is provided with a marking sleeve and a depth indication sleeve. The marking sleeve has a developing function under X-ray and ultrasound. The length of the marking sleeve is shorter than the length of the marking sleeve of common puncture needles on the market, which causes less pain and harm to patients. The depth indication sleeve uses platinum-iridium alloy as raw material. Platinum-iridium alloy, as a commonly used cardiovascular implant material, has the advantages of good bioaffinity and strong developing performance under X-ray or ultrasound. It can serve as a prompt when the doctor observes the puncture depth under X-ray or ultrasound, making it convenient for the doctor to find the position of the positioning hook after puncture. In addition, the marking sleeve and the depth indication sleeve are sleeved on the outside of the straight section of the anchoring guide wire, so they can be touched, which can assist the doctor in determining the puncture depth or provide prompts when removing the lesion.

2. The two free ends of the fixed guide wire of the flexible puncture needle for breast positioning of the present application form a cross-shaped structure in the marking sleeve and the distal end of the anchoring guide wire on the cross-section of the marking sleeve. At this time, the marking sleeve is fixed with the fixed guide wire and the anchoring guide wire by interference fit, and the anchoring guide wire will not deflect or shift in the marking sleeve, ensuring that the anchoring hook wire is symmetrically arranged, and the anchoring performance of the positioning hook is better.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the overall structure of the flexible puncture needle for breast positioning of the present invention.

FIG. 2 is a schematic structural diagram of a positioning wire assembly of a flexible puncture needle for breast positioning according to the present invention.

FIG. 3 is a schematic structural diagram of a positioning hook in a positioning wire assembly of the present invention.

FIG. 4 is a left side view of the positioning hook of the present utility model.

FIG5 is a schematic structural diagram of the guide needle assembly of the flexible puncture needle for breast positioning of the present invention.

FIG. 6 is a schematic structural diagram of the puncture needle tube in the guide needle assembly of the present invention.

FIG. 7 is a schematic structural diagram of a push rod and a push rod handle in the guide needle assembly of the present invention.

DETAILED DESCRIPTION

The technical solution of the present application and the advantages brought about by it are further described in detail below in conjunction with the accompanying drawings and specific embodiments. Among them, the components in the accompanying drawings are not necessarily drawn to scale, and the focus is on illustrating the concept of the present application.

The “proximal end” mentioned in the present application refers to the end close to the surgical operator, and the “distal end” mentioned in the present application refers to the end far away from the surgical operator.

As shown in Figure 1, a flexible puncture needle for breast positioning includes a positioning wire assembly 1 and a guide needle assembly 3. As shown in Figure 2, the positioning wire assembly 1 is composed of a positioning hook 11 and a positioning wire 12. The proximal end of the positioning hook 11 is fixedly connected to the distal end of the positioning wire 12, and the positioning wire 12 is flexible. As shown in Figure 5, the guide needle assembly 3 includes a puncture needle tube 31, a guide needle handle 33 and a push rod 34. The proximal end of the puncture needle tube 31 is fixedly connected to the guide needle handle 33. As shown in Figure 1, the puncture needle tube 31 is sleeved outside the positioning wire assembly 1, and the push rod 34 is arranged in the puncture needle tube 31. The distal end of the push rod 34 abuts against the proximal end of the positioning hook 11, and is used to push the positioning hook 11 out of the puncture needle tube 31. As shown in FIG3 , the positioning hook 11 includes a marking sleeve 111, a fixed guide wire 112, a depth indication sleeve 113 and an anchoring guide wire 114. The length of the positioning hook 11 is preferably 19.5-22 mm. The anchoring guide wire 114 includes a straight section 1141 and a curved section 1142. The marking sleeve 111 and the depth indication sleeve 113 are sleeved on the straight section 1141 of the anchoring guide wire 114. The marking sleeve 111 is fixed at the proximal end of the curved section 1142. The depth indication sleeve 113 is fixed at the proximal end of the straight section 1141. The fixed guide wire 112 is used to fix the anchoring guide wire 114 in the marking sleeve 111, so that the anchoring guide wire 114 is fixed in the marking sleeve 111 without displacement. The marking sleeve 111 is preferably made of stainless steel.

The anchoring guide wire 114 is formed by folding a shape memory alloy wire in half to form a bend 1143 at the proximal end and two free ends at the distal end. The portion of the anchoring guide wire 114 exposed from the marking sleeve 111 after being folded in half is heat-formed into the curved section 1142, and the proximal portion of the anchoring guide wire 114 after being folded in half is divided into the straight section 1141. The bend 1143 is preferably in an arc shape. In one embodiment, the curved section 1142 of the anchoring guide wire 114 after being folded in half is two symmetrical anchoring hook wires 1144. Preferably, the two anchoring hook wires 1144 are symmetrically arranged at 180 degrees. The anchoring guide wire 114 is preferably a nickel-titanium wire. The anchoring hook wire 1144 made of nickel-titanium wire has good memory and good bioaffinity. When not in use, the positioning hook 11 can be put into the puncture needle tube 31 to protect the positioning hook 11 from damage. The anchoring hook wire 1141 can be quickly restored after release, and the anchoring force of the positioning hook 11 is not affected. In one embodiment, the positioning wire 12 is fixedly connected to the anchoring guide wire 114 at the bend 1143 by glue dripping. In other embodiments, a knot is tied or the positioning wire 12 is fixedly connected to the anchoring guide wire 114 at the bend 1143 by knotting.

As shown in FIG3 , the fixed guide wire 112 is folded in half, and the proximal end of the folded fixed guide wire 112 is entangled and knotted with the anchoring guide wire 114 to form a fixed guide wire knot 1121. As shown in FIG4 , the distal end of the folded fixed guide wire 112 is inserted into the marking sleeve 111, and is arranged in a cross-shaped structure with the anchoring guide wire 114 on the cross section of the marking sleeve 111, and the fixed guide wire 112 and the anchoring guide wire 114 are connected to the marking sleeve 111 by interference fit. Preferably, the distal end of the folded fixed guide wire 112 is flush with the distal end of the marking sleeve 111. During the manufacturing process, after the distal end of the fixed guide wire 112 is inserted into the marking sleeve 111, the portion of the fixed guide wire 112 exposed at the distal end of the marking sleeve 111 can be cut off, so that the distal end of the fixed guide wire 112 is flush with the distal end of the marking sleeve 111.

In one embodiment, the surface where the fixed wire knot 1121 is located is perpendicular to the surface where the bend 1143 is located, so that the fixed wire 112 more firmly fixes the anchoring wire 114. In addition, the distal end of the fixed wire 112 is in a cross shape with the anchoring wire 114 on the cross section of the marking sleeve 112, so that the anchoring wire 114 will not deflect or shift in the marking sleeve 111, ensuring that the anchoring hook wire 1144 is in a 180-degree symmetrical position, and the anchoring performance of the positioning hook 11 is better.

The marking sleeve 111 of the utility model has a developing function under X-ray and ultrasound, and the length of the marking sleeve is 3-10mm, preferably 5mm. The length of the marking sleeve 111 is lower than the length of the common puncture needle marking sleeve on the market, and the pain and harm caused to the patient are less. The length of the depth prompt sleeve 113 is preferably 3mm, and platinum-iridium alloy is selected as the raw material. Platinum-iridium alloy, as a commonly used cardiovascular implant material, has good bioaffinity and strong developing performance under X-ray or ultrasound. It can serve as a prompt when the doctor observes the puncture depth under X-ray or ultrasound, and it is convenient for the doctor to find the position of the positioning hook 11 after puncture. Moreover, the marking sleeve 111 and the depth prompt sleeve 113 are sleeved outside the straight section of the anchoring guide wire, so they can be touched, which can assist the doctor in determining the puncture depth, or provide prompts when removing the lesion.

The positioning wire 12 of the present application is flexible, and non-absorbent polypropylene suture is selected as raw material. Suture, as a commonly used medical consumable, has good biocompatibility and high breaking strength. The positioning wire 12 is not dyed, and is fixedly connected with the positioning hook 11 by knotting and/or dripping glue after being folded in half. Therefore, the positioning hook 11 (19.5-22mm) of the positioning wire assembly 1 is rigid, and the positioning wire 12 is a flexible material. In surgery, the pain and tension caused by the positioning wire 12 to the patient are small, and the positioning wire 12 is a non-metallic material, which is not easy to transfer heat to produce local warming during surgery. In one embodiment, after the positioning wire 12 is fixed to the bend 1143 of the anchoring guide wire 114 by knotting, it can also be fixed again by dripping glue to prevent the knotting position from being loose.

As shown in FIG5 , a button 32 is provided on the guide needle handle 33, and the button 32 is fixedly connected to the push rod 34, and the release of the positioning wire assembly 1 is achieved by moving the button 32. In an optional embodiment, the guide needle handle 33 is integrally injection molded. The push rod 34 is a hollow design, and the proximal end of the positioning wire 12 passes through the cavity of the push rod 34 and extends outside the proximal end of the push rod 34. As shown in FIG7 , the proximal end of the push rod 34 is fixedly connected with a push rod handle 341. The push rod 34 and the push rod handle 341 can be fixedly connected by bonding. The push rod handle 341 can also be integrally injection molded, and the doctor can release the positioning wire assembly 1 by pushing the tail end of the push rod handle 341 when in use. Therefore, in use, the operator can push the push rod handle 342 toward the needle tip 311 of the puncture needle tube 31, which has a double push structure.

As shown in Fig. 6, a needle tip 311 is provided at the distal end of the puncture needle tube 31, and a scale line 312 is provided on the tube body of the puncture needle tube 31. As shown in Fig. 5 and Fig. 6, a direction mark 331 is provided on the guide needle handle 33, and the direction mark 331 is consistent with the direction of the needle tip 311 of the puncture needle tube 31, so as to remind the doctor of the pushing direction when using.

In one embodiment, as shown in FIG. 1 , a buckle 2 is provided at the distal end of the guide needle assembly 3 , and when the buckle 2 is not removed, the button 33 or the push rod handle 341 on the guide needle assembly 3 cannot be pushed toward the needle tip 311 of the puncture needle tube.

The above detailed description of the utility model is intended to enable people familiar with the technology in this field to understand the content of the utility model and implement it. It is not intended to limit the protection scope of the utility model. All equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims (10)

1. The utility model provides a flexible pjncture needle for mammary gland location, includes location silk subassembly and guide needle subassembly, the location silk subassembly comprises location hook and location silk, the proximal end of location hook with the distal end fixed connection of location silk, the guide needle subassembly includes puncture needle tube, guide needle handle and push rod, the proximal end of puncture needle tube with guide needle handle fixed connection, puncture needle tube cup joints outside the location silk subassembly, the push rod is set up in the puncture needle tube, the distal end of push rod with the proximal end butt of location hook is used for with the location hook is released outside the puncture needle tube, its characterized in that, the location hook is flexible, the location hook includes mark sleeve pipe, fixed seal wire, degree of depth suggestion sleeve pipe and anchor seal wire, the anchor seal wire includes straight section and curved section, mark sleeve pipe with the degree of depth suggestion sleeve pipe is cup jointed the straight section of anchor seal wire, mark sleeve pipe is fixed in the proximal end department of curved section, the degree of depth suggestion sleeve pipe is fixed in the proximal end section, be used for fixing the anchor seal wire in the anchor seal wire.

2. The flexible puncture needle for breast positioning according to claim 1, wherein the anchoring wire is formed by folding a shape memory alloy wire into a bent portion at a proximal end and two free ends at a distal end, a distal end portion of the folded anchoring wire is heat-set into the bent portion, and a proximal end portion of the folded anchoring wire is the flat portion.

3. The flexible penetration needle for breast positioning of claim 2, wherein said curved section of said anchoring guidewire after doubling back is two symmetrical anchoring hooks.

4. A flexible penetration needle for breast positioning according to claim 3, wherein two of said anchoring hooks are symmetrically disposed at 180 degrees.

5. The flexible puncture needle for breast positioning according to claim 2, wherein the fixing guide wire is folded in half, the proximal end of the fixing guide wire folded in half and the anchoring guide wire are wound and knotted to form a fixing guide wire knot, the distal end of the fixing guide wire folded in half is inserted into the marking sleeve and is arranged in a cross structure with the anchoring guide wire on the cross section of the marking sleeve, and the fixing guide wire and the anchoring guide wire are connected with the marking sleeve in an interference fit manner.

6. The flexible penetration needle for breast positioning of claim 5, wherein the plane of the fixed guide wire knot is perpendicular to the plane of the bend.

7. The flexible lance of claim 1 wherein the marker cannula is 3-10mm in length.

8. The flexible penetration needle for breast positioning of claim 1, wherein a catch is provided at the distal end of the introducer needle assembly.

9. The flexible penetration needle for breast positioning according to claim 1, wherein a button is provided on the introducer needle handle, the button being fixedly connected to a push rod, and the release of the wire assembly is accomplished by moving the button.

10. The flexible needle of claim 1, wherein the pushrod is hollow in design and the proximal end of the positioning wire extends through the cavity of the pushrod and out of the proximal end of the pushrod.