CN215349349U

CN215349349U - Active particle implantation puncture needle

Info

Publication number: CN215349349U
Application number: CN202121826867.4U
Authority: CN
Inventors: 徐旭; 于明军
Original assignee: Really Ming Medical Technology Beijing Co ltd
Current assignee: Really Ming Medical Technology Beijing Co ltd
Priority date: 2021-08-06
Filing date: 2021-08-06
Publication date: 2021-12-31
Anticipated expiration: 2031-08-06

Abstract

The utility model provides a radioactive particle implantation puncture needle, which comprises a needle core (4) and a needle tube (5) which are sleeved inside and outside, wherein the rear end of the needle tube (5) is connected with a connector (2), the rear end of the needle core (4) is connected with a needle core cap (1), a positioning structure is arranged between the connector (2) and the needle core cap (1), and when the needle core cap (1) is inserted into the connector (2), the positioning structure can prevent the needle core cap (1) from axially moving and circumferentially rotating relative to the connector (2). The radioactive particle implantation puncture needle is suitable for dense needle distribution, can release radioactive particles at a more accurate position, and provides a perfect solution for radioactive particle implantation.

Description

Active particle implantation puncture needle

Technical Field

The utility model relates to the field of medical instruments, in particular to a radioactive particle implantation puncture needle.

Background

In recent years, with the rapid development of medical technology, radioactive particle implantation therapy is increasingly applied to the treatment of some middle and late stage tumors such as lung cancer, prostate cancer, liver cancer and the like. The radioactive particle implantation treatment technology is a treatment method for implanting radioactive source into the interior of tumor to make it destroy tumor. The core of the radioactive source designed by the technology is radioactive particles, and most of the radioactive sources clinically used at present are iodine 125. The outer diameter of the titanium tube of the radioactive particle outer casing material is 0.8mm, the length is 4.5mm, the wall thickness is 0.05mm, the size of the silver wire of the core material is phi 0.5 gamma 3mm, and the surface layer of the silver wire is plated with iodine [ I-125] isotope. The half decay time of the iodine 125 is 59.6 days, the penetration distance of the rays emitted by the particles is short, and the effective killing range is 1.7cm, so that the surrounding normal tissues are not damaged, and the general symptoms are not caused. The particle implantation treatment can improve the local control rate and the long-term treatment rate of the tumor, can kill the tumor cells to the maximum extent, and simultaneously protects the surrounding normal tissues. The operation flow of the particle implantation and the puncture is almost the same, the puncture needle is inserted into the tumor under the guidance of the CT, and the particles are placed through the puncture needle.

There are 3 modalities of particle implantation therapy: template planting, B ultrasonic and CT guided planting and intraoperative planting. The first two modes all need to use a puncture needle, and at present, no special particle implantation puncture needle exists, and the puncture is carried out by using an amniotic fluid puncture needle. The amniotic fluid puncture needle has the advantages that the size of the needle core cap and the connector is small, and the amniotic fluid puncture needle is suitable for densely arranging needles in a small area. But the greatest problem of the amniotic fluid puncture needle is that the release position is not accurate. Because the front end of the amniotic fluid puncture needle is a bevel needle, when the radioactive particles are released, the radioactive particles can be released at any position of the bevel, the distance between the top end and the bottom end of the bevel is 2 mm-3 mm, the radioactive particles are dozens of radioactive particles which are evenly distributed in a tumor with the size of a few centimeters, the requirement on the release position is very high, and the amniotic fluid puncture needle cannot meet the requirement.

SUMMERY OF THE UTILITY MODEL

In order to realize accurate implantation of radioactive seeds, the utility model provides the radioactive seed implantation puncture needle which is suitable for densely distributing needles and can realize release of the radioactive seeds at a more accurate position, thereby providing a perfect solution for radioactive seed implantation.

The technical scheme adopted by the utility model for solving the technical problems is as follows:

the utility model provides a pjncture needle is implanted to radioactive particle, includes nook closing member and needle tubing that the endotheca was established, and the rear end of needle tubing is connected with the connector, and the rear end of nook closing member is connected with the nook closing member cap, is equipped with location structure between connector and the nook closing member cap, when the nook closing member cap inserts in the connector, location structure can prevent that the nook closing member cap from for connector axial displacement and circumferential direction.

The positioning structure comprises a convex block and an inverted L-shaped groove, the convex block is positioned outside the needle core cap, and the inverted L-shaped groove is positioned in the connector.

The outer surface of the needle core cap comprises a core cap front small-diameter section and a core cap rear large-diameter section which are arranged in front and at back, the core cap front small-diameter section can be inserted into the connector, and the bulge block is positioned outside the core cap front small-diameter section.

The surface of connector contains from the past to the preceding minor diameter section before the joint that sets gradually back, connects major diameter section and connects the back minor diameter section, and the inverted L shape groove is located and connects the back minor diameter section.

The inverted L-shaped groove contains axial section and circumference section, and the one end and the axial section of circumference section are connected, and the circumference section appears on the lateral wall of connector, and the axial section is hidden in the lateral wall of connector, and the other end butt with the circumference section after the axial section and the circumference section removal in the inverted L-shaped groove can be followed in proper order to the protruding piece.

The outer contour of the cross section of the core cap rear large-diameter section is square, two adjacent sides of the square are in circular transition or chamfer transition, a plurality of transverse convex edges are arranged on the outer surface of the core cap rear large-diameter section corresponding to each side of the square, and the transverse convex edges are arranged at intervals along the axial direction of the needle core cap.

The front portion of the small-diameter section is provided with a plurality of bar-shaped grooves, the bar-shaped grooves extend along the axis of the connector, the bar-shaped grooves are arranged along the circumferential interval of the connector, the outline of the section of the large-diameter section in the connector is square, circular transition or chamfer transition is formed between two adjacent edges of the square, and an annular outer flange is arranged at the outer part of the rear end of the small-diameter section behind the connector.

The front end of the needle core is provided with a cutting edge, the front end surface of the needle core is vertical to the axis of the needle core, the front end of the needle tube is provided with a triangular needle point, and the front end of the needle core is exposed out of the front end of the needle tube.

The needle tubing overcoat is equipped with the location plug, location plug and needle tubing clearance fit or transition fit, and the location plug can move along the axis direction of needle tubing, and the surface of location plug contains plug toper section, plug minor diameter section and the big footpath section of plug that sets gradually from the past backward.

The positioning structure comprises a convex block and a positioning hole, the convex block is positioned outside the needle core cap, the positioning hole is positioned in the connector, a spring is connected between the convex block and the needle core cap, the convex block can move along the diameter direction of the needle core cap, and the convex block and the positioning hole can be matched and spliced.

The utility model has the beneficial effects that: the radioactive particle implantation puncture needle is suitable for dense needle distribution, can release radioactive particles at a more accurate position, and provides a perfect solution for radioactive particle implantation.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model.

Fig. 1 is a front view schematically showing a radioactive seed implanting puncture needle according to the present invention in example 1.

Fig. 2 is a schematic view of the axial movement of the plunger cap with respect to the connector in embodiment 1.

Fig. 3 is a schematic view of circumferential rotation of the plunger cap with respect to the joint head in embodiment 1.

Fig. 4 is a perspective view schematically showing a radioactive seed implanting puncture needle according to the present invention in example 1.

Fig. 5 is an enlarged schematic view of a portion a in fig. 3.

FIG. 6 is a schematic view of the cutting edge in example 1.

FIG. 7 is a schematic view of a triangular needlepoint in example 1.

Fig. 8 is a schematic view of the positioning structure described in embodiment 2.

1. A needle core cap; 2. a connector; 3. positioning the rubber plug; 4. a needle core; 5. a needle tube;

11. a raised block; 12. a core cap front minor diameter section; 13. a core cap rear major diameter section; 14. a spring;

21. an inverted L-shaped groove; 22. a small diameter section in front of the joint; 23. a major diameter section in the joint; 24. a small diameter section behind the joint; 25. positioning holes;

31. a conical section of the rubber plug; 32. a rubber plug small-diameter section; 33. a rubber plug large-diameter section;

131. a transverse rib;

211. an axial section; 212. a circumferential segment;

221. a strip-shaped groove;

241. an annular outer flange.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

Example 1

The utility model provides a pjncture needle is implanted to radioactive seeds, includes nook closing member 4 and needle tubing 5 that the endotheca was established, the rear end fixedly connected with connector 2 of needle tubing 5, the rear end fixedly connected with nook closing member cap 1 of nook closing member 4 is equipped with location structure between connector 2 and the nook closing member cap 1, when the nook closing member cap 1 inserts in the connector 2, location structure can prevent that nook closing member cap 1 is for connector 2 axial displacement and circumferential direction, as shown in fig. 1 to fig. 4.

The needle tube 5 and the connector 2 are connected and fixed into a whole, the needle tube 5 is made of metal, and the connector 2 is made of plastic. The needle core 4 and the needle core cap 1 are connected and fixed into a whole, the needle core 4 is made of metal, and the needle core cap 1 is made of plastic. The needle core 4 can be inserted into the needle tube 5, and the needle core 4 can be detached from the needle tube 5. The needle core 4 is in clearance fit or transition fit with the needle tube 5. The positioning structure ensures that the needle core cap 1 cannot be loosened from the connector 2 when the needle core 4 is stressed in the puncture process of the puncture needle.

In this embodiment, the positioning structure comprises a protrusion 11 and an inverted L-shaped groove 21, the protrusion 11 is located outside the needle core cap 1, and the inverted L-shaped groove 21 is located inside the connector 2. The outer surface of the needle core cap 1 comprises a core cap front small-diameter section 12 and a core cap rear large-diameter section 13 which are arranged in the front and at the back, the core cap front small-diameter section 12 can be matched with the core cap in the insertion connector 2, and the bulge block 11 is positioned outside the core cap front small-diameter section 12.

In this embodiment, the outer surface of the connecting head 2 includes a front small-diameter joint section 22, a middle large-diameter joint section 23, and a rear small-diameter joint section 24, which are arranged in this order from front to back, and the inverted L-shaped groove 21 is located in the rear small-diameter joint section 24. The inverted-L-shaped groove 21 contains an axial section 211 and a circumferential section 212, one end of the circumferential section 212 is connected with the axial section 211, the circumferential section 212 is of a through hole structure, the circumferential section 212 is exposed on the side wall of the connector 2, the axial section 211 is hidden in the side wall of the connector 2, and the protruding block 11 can be abutted to the other end of the circumferential section 212 after moving along the axial section 211 and the circumferential section 212 of the inverted-L-shaped groove 21 in sequence, as shown in fig. 5.

The positioning structure can prevent the axial movement and the circumferential rotation of the needle core cap 1 relative to the connector 2, and specifically, after the protruding block 11 abuts against the other end of the circumferential section 212, the needle core cap 1 cannot axially move and circumferentially rotate clockwise relative to the connector 2, and the needle core 4 cannot axially move and circumferentially rotate clockwise relative to the needle tube 5, as shown in fig. 3.

In this embodiment, the outer contour of the cross section of the core cap rear major diameter section 13 is square, two adjacent sides of the square are in circular transition or chamfer transition, the outer surface of the core cap rear major diameter section 13 corresponding to each side of the square is provided with a plurality of transverse ribs 131, the transverse ribs 131 are perpendicular to the axis of the core cap 1, and the transverse ribs 131 are arranged at intervals along the axis direction of the core cap 1.

In this embodiment, the front portion of the front small-diameter section 22 of the joint is provided with a plurality of strip-shaped grooves 221, the strip-shaped grooves 221 extend along the axis of the joint 2, the strip-shaped grooves 221 are arranged along the circumferential direction of the joint 2 at intervals, the outer contour of the cross section of the middle large-diameter section 23 of the joint is square, two adjacent sides of the square are in circular transition or chamfer transition, and the rear end of the rear small-diameter section 24 of the joint is externally provided with an annular outer flange 241. The axial segment 211 is located in the joint between the large diameter segment 23 and the external annular flange 241.

In this embodiment, the front end of the needle core 4 is provided with a cutting edge, and as shown in fig. 6, the front end surface of the needle core 4 is perpendicular to the axis of the needle core 4. When the cutting edge of flat head type releases the radioactive particles, the problem that the release position of the bevel needle is uncertain is avoided, and accurate positioning release is realized. The tip of the needle tube 5 is provided with a triangular needlepoint, and as shown in fig. 7, the tip of the needle core 4 is exposed from the tip of the needle tube 5. The puncture effect of the triangular needle tip is better than that of a bevel needle, the skin breaking capacity is stronger, the stress is uniform in the puncture process, and the needle channel is not easy to deflect.

In this embodiment, the surface of needle tubing 5 is equipped with the length scale, and 5 overcoat of needle tubing is equipped with location plug 3, and

location plug

3 and 5 clearance fit of needle tubing or transition fit, location plug 3 can move along the axis direction of needle tubing 5, and the surface of location plug 3 contains plug toper section 31, plug minor diameter section 32 and plug major diameter section 33 that the past set gradually backward.

The diameter of the needle tube 5 is mainly 20G (the outer diameter X the inner diameter of the needle tube 5: 0.9mm X0.7 mm, the diameter of the needle core 4: 0.65mm) and 18G (the outer diameter X the inner diameter of the needle tube 5: 1.27mm X1.05 mm, the diameter of the needle core 4: 1.0mm)2, and the length of the needle tube 5 is 15cm, 20cm and 25 cm. The needle tube 5 and the needle core 4 are both made of 304 stainless steel. The size of the front end of the needle core 4 exposed out of the front end of the needle tube 5 can be 1mm-10 mm.

The operation of the radioactive seed implantation puncture needle will be described below.

The radioactive seed implantation puncture needle is assembled as shown in fig. 3.

Step 1, the radioactive particle implantation puncture needle punctures to a target position of human tissue;

step 2, pulling out the stylet 4 and the stylet cap 1;

step 3, loading radioactive particles on the particle pushing gun, and connecting the connector 2 with the particle pushing gun;

step 4, pushing radioactive particles into the connector 2 by a particle gun;

step 5, inserting a pushing rod, pushing the radioactive particles out of the outer needle tube 5 through the needle tube 5, and reaching a target position;

and 6, moving the needle tube 5 outwards, changing the position of the needle tube 5, repeating the steps 4 to 5 in sequence, continuously releasing the particles, and finally pulling out the needle tube 5.

Example 2

This embodiment is a modification of embodiment 1, and the main difference between this embodiment and embodiment 1 is that the specific structure of the positioning structure is different, in this embodiment, the positioning structure includes a protrusion 11 and a positioning hole 25, the protrusion 11 is located outside the needle core cap 1, the positioning hole 25 is located inside the connector 2, a spring 14 is connected between the protrusion 11 and the needle core cap 1, the protrusion 11 can move along the diameter direction of the needle core cap 1, and the protrusion 11 and the positioning hole 25 can be inserted and mated, as shown in fig. 8.

Other technical features in this embodiment are the same as those in embodiment 1, and this embodiment will not be described in detail for the sake of brevity.

The above description is only exemplary of the utility model and should not be taken as limiting the scope of the utility model, so that the utility model is intended to cover all modifications and equivalents of the embodiments, which may be included within the spirit and scope of the utility model. In addition, the technical features and the technical schemes, and the technical schemes can be freely combined and used.

Claims

1. The utility model provides a pjncture needle is implanted to radioactive particle, a serial communication port, pjncture needle is implanted to radioactive particle includes nook closing member (4) and needle tubing (5) that the endotheca was established, and the rear end of needle tubing (5) is connected with connector (2), and the rear end of nook closing member (4) is connected with nook closing member cap (1), is equipped with location structure between connector (2) and nook closing member cap (1), when nook closing member cap (1) inserts in connector (2), location structure can prevent that nook closing member cap (1) from for connector (2) axial displacement and circumferential direction.

2. The radioactive particle implantation puncture needle according to claim 1, wherein the positioning structure comprises a protrusion (11) and an inverted L-shaped groove (21), the protrusion (11) is located outside the hub cap (1), and the inverted L-shaped groove (21) is located inside the connector (2).

3. The radioactive particle implantation puncture needle according to claim 2, wherein the outer surface of the core cap (1) has a core cap front small diameter section (12) and a core cap rear large diameter section (13) arranged in the front and rear directions, the core cap front small diameter section (12) is insertable into the connector (2), and the bulge (11) is located outside the core cap front small diameter section (12).

4. The radioactive particle implantation puncture needle according to claim 2, wherein the outer surface of the connector (2) includes a front small diameter section (22), a middle large diameter section (23), and a rear small diameter section (24) in this order from the front to the rear, and the inverted L-shaped groove (21) is provided in the rear small diameter section (24).

5. The radioactive particle implantation puncture needle according to claim 2, wherein the inverted L-shaped groove (21) includes an axial section (211) and a circumferential section (212), one end of the circumferential section (212) is connected to the axial section (211), the circumferential section (212) is exposed on a side wall of the connector (2), the axial section (211) is hidden in the side wall of the connector (2), and the protrusion (11) can be moved along the axial section (211) and the circumferential section (212) of the inverted L-shaped groove (21) in sequence and then abutted against the other end of the circumferential section (212).

6. The radioactive particle implantation puncture needle according to claim 3, wherein the outer profile of the cross section of the core cap rear major diameter section (13) is square, two adjacent sides of the square are in circular transition or chamfer transition, a plurality of transverse ribs (131) are arranged on the outer surface of the core cap rear major diameter section (13) corresponding to each side of the square, and the plurality of transverse ribs (131) are arranged at intervals along the axial direction of the core cap (1).

7. The radioactive particle implantation puncture needle according to claim 4, wherein a plurality of strip-shaped grooves (221) are formed in the front portion of the small diameter section (22) in front of the connector, the strip-shaped grooves (221) extend along the axis of the connector (2), the strip-shaped grooves (221) are arranged at intervals in the circumferential direction of the connector (2), the outer contour of the cross section of the large diameter section (23) in the connector is square, two adjacent sides of the square are in circular transition or chamfer transition, and an annular outer flange (241) is formed outside the rear end of the small diameter section (24) behind the connector.

8. The radioactive particle implantation puncture needle according to claim 1, wherein the tip of the needle core (4) is provided with a cutting edge, the tip of the needle core (4) is perpendicular to the axis of the needle core (4), the tip of the needle tube (5) is provided with a triangular needle tip, and the tip of the needle core (4) is exposed from the tip of the needle tube (5).

9. The radioactive particle implantation puncture needle according to claim 1, wherein a positioning rubber plug (3) is sleeved outside the needle tube (5), the positioning rubber plug (3) is in clearance fit or transition fit with the needle tube (5), the positioning rubber plug (3) can move along the axis direction of the needle tube (5), and the outer surface of the positioning rubber plug (3) comprises a rubber plug conical section (31), a rubber plug small-diameter section (32) and a rubber plug large-diameter section (33) which are sequentially arranged from front to back.

10. The radioactive particle implantation puncture needle according to claim 1, wherein the positioning structure comprises a protrusion (11) and a positioning hole (25), the protrusion (11) is located outside the needle core cap (1), the positioning hole (25) is located inside the connector (2), a spring (14) is connected between the protrusion (11) and the needle core cap (1), the protrusion (11) can move in the diameter direction of the needle core cap (1), and the protrusion (11) and the positioning hole (25) can be inserted and connected in a matching manner.