CN215739311U - Uniform injection curved hole needle in tumor - Google Patents

Abstract

The utility model relates to a curved-hole needle for uniform injection in tumors, which comprises a trocar and an injection needle, wherein an annular groove is formed in the outer wall of the trocar, a lantern ring is arranged in the annular groove, the lantern ring is connected with a positioning plate through a supporting rod, a sliding-in channel, a clamping groove, a blocking wall, a blocking block and a sliding-out channel are formed in the positioning plate, a plurality of wedge-shaped bulges are arranged on the inner wall of the trocar along the circumferential direction, a curved needle head is arranged at the top end of the injection needle, clamping teeth matched with the wedge-shaped bulges are arranged at the tail end of the injection needle, an L-shaped elastic sliding rod is arranged on the injection needle, an insertion rod is arranged at the top end of the L-shaped elastic sliding rod, the top end of the insertion rod is opposite to the positioning plate, and a compression spring is arranged between the side edge of the positioning plate and the elastic sliding rod. The utility model can conveniently adjust the position and the angle of the needle head of the injection needle after being inserted into the tumor, is convenient for evenly injecting the tumor medicine and improves the treatment effect.

Description

Uniform injection curved hole needle in tumor

The technical field is as follows:

the utility model relates to the technical field of medical instruments, in particular to a curved-hole needle for uniform injection in tumors.

Background art:

at present, the common clinical tumor treatment modes are gradually popularized and applied except surgical resection, angiochemotherapy and the like, and the minimally invasive treatment mode of locally injecting drugs such as immune checkpoint inhibitors, oncolytic viruses and the like into tumors is also in progress. The existing devices for intratumoral injection generally adopt a common syringe needle head for injection or a longer straight puncture needle, an operator manually controls an injection point in a tumor, and because the inside of the tumor is invisible, especially when the tumor is positioned in a deeper visceral organ in a body, the position of the needle head in the inside of the tumor is difficult to control and adjust, the medicine is difficult to be injected into the tumor uniformly, and thus the treatment effect is influenced. Patent No. ZL201920794488.8 is through setting up sectorial fixed plate and angle adjusting device, and angle adjusting device includes connecting plate, cylinder fixing base, syringe needle fixing base and buckle, is connected with cylinder fastening device on the cylinder fixing base. Adopt the fixed bolster fixed injection cylinder and can conveniently adjust the fixed angle of injection cylinder, and can observe the syringe needle injection angle, make things convenient for the injection of injection cylinder, prevent that injection angle mistake from causing economic loss and healthy injury for the patient. However, this structure can only adjust the injection angle, and cannot adjust the position of the needle inside the tumor, and only the needle head end releases the drug, so it is necessary to puncture the tumor through the skin many times, and it is difficult to inject the drug uniformly to different positions inside the tumor, which affects the therapeutic effect.

The utility model has the following contents:

technical problem to be solved

The utility model aims to provide a curved-hole needle for uniform injection in tumors, which is used for medicine injection in tumors and solves the problems that the position of a needle head cannot be adjusted in the tumors under one-time puncture operation, the medicine is released only from the head end of the needle head, the medicine is difficult to be uniformly injected to different positions in the tumors, and the treatment effect is influenced in the prior art.

The technical scheme is as follows:

in order to solve the technical problems, the utility model adopts the following technical scheme: the utility model provides an even injection is with curved hole needle in tumour, includes trocar and syringe needle, be equipped with the ring channel on the outer wall of trocar, be equipped with the lantern ring in the ring channel, the lantern ring is connected with the locating plate through the bracing piece, be equipped with on the locating plate and slide into way, screens groove, fender wall, dog and slip out way, the inner wall of trocar is equipped with a plurality of wedge arch along the circumferencial direction, the top of syringe needle is equipped with crooked syringe needle, be equipped with a plurality of on the crooked syringe needle and go out the liquid hole, the tail end of syringe needle be equipped with the protruding complex latch of wedge, be equipped with L type elasticity slide bar on the syringe needle, the top of L type elasticity slide bar is equipped with the inserted bar, the top of inserted bar is just right the locating plate, the side of locating plate with be equipped with compression spring between the L type elasticity slide bar.

The trocar is used for puncturing and entering the edge of a tumor to be injected with medicine, the injection needle is used for penetrating through the trocar and inserting into the tumor to be connected with a syringe for injecting the medicine, the lantern ring can rotate around the trocar in the annular groove, the latch is inserted into a gap between the wedge-shaped protrusions to circumferentially position the injection needle, the bent needle head is inserted into the tumor, the medicine is uniformly injected into the tumor through the liquid outlet hole, the insertion rod is used for being inserted into the slide-in channel, the blocking groove and the slide-out channel on the positioning plate to push the injection needle to move along the trocar, the insertion depth of the injection needle can be adjusted, the insertion rod moves in the slide-in channel, the blocking groove and the slide-out channel, and after the adjustment is completed, the insertion rod is blocked by the blocking wall and the blocking block in the blocking groove under the elastic force of the compression spring, so as to position the insertion position of the injection needle, thereby realizing the uniform injection of the medicine of the injection needle at different depth positions in the tumor. Through the rotation the syringe needle, the latch slides into adjacently the clearance between the wedge arch, the lantern ring the locating plate L type elasticity slide bar along with the syringe needle rotates together, crooked syringe needle along trocar circumferential direction to realize the adjustment of injection angle, effectively reduce the number of times of percutaneous puncture, alleviate patient's misery.

Furthermore, the slide-in channel is S-shaped, the slide-out channel is straight, the clamping groove is divided into a clamping groove A and a clamping groove B, the stop is divided into a stop A and a stop B, the stop wall is divided into a stop wall A and a stop wall B, the depth of the clamping groove A is larger than that of the slide-in channel and smaller than that of the slide-out channel, the slide-out channel has a certain inclination, the depth of the clamping groove B is the same as that of the deepest part of the slide-out channel, the stop wall B is positioned in the clamping groove B, the stop wall A is positioned at the junction of the minimum depth of the slide-out channel and the slide-in channel, the insertion rod slides along the slide-in channel by pushing the injection needle, the operation track is changed after being blocked by the stop wall, and according to the difference of the depth of pushing the injection needle, the top end of the insertion rod respectively enters the clamping groove A or the clamping groove B, after the pushing is stopped, the insertion rod is blocked by the stop block A and the stop block B under the action of the elastic force of the compression spring, the insertion depth of the injection needle is fixed, the operation of injecting the medicine is convenient, after the injection is finished, the injection needle is continuously pushed, the insertion rod enters the sliding passage and is loosened, the insertion rod moves out of the positioning plate from the sliding passage under the action of the elastic force of the compression spring, and the injection needle is convenient to be pulled out of the tumor.

Further, insert the pole and divide into dead lever and telescopic link, be equipped with the spout in the dead lever, the one end of telescopic link is in the spout and with through spring coupling between the inner wall of spout, the telescopic link can be in under the spring action of spring remove in the spout, guarantee insert the pole at the different degree of depth the slip in the way the screens groove with when the slip in-channel removes, the top of telescopic link all the time with the slip in the way the screens groove with the bottom laminating in slip out the way ensures the location of syringe needle is accurate.

Furthermore, elastic washers are arranged on two sides of the lantern ring, so that certain friction force is guaranteed between the lantern ring and the annular groove, and the lantern ring is prevented from freely rotating in the annular groove.

Furthermore, the outer wall of the tail end of the injection needle is provided with anti-slip lines, so that an operator can rotate the angle of the injection needle conveniently, and the hand slip is avoided.

Furthermore, the latch is elastic rubber, has certain elasticity, and is convenient for the latch to rotate and position between the wedge-shaped bulges.

Furthermore, L type elasticity slide bar is the PE plastics material, has suitable hardness and elasticity, can be along with the removal of inserted bar produces certain deformation, avoids the inserted bar be in slide in the way, the screens groove with slide out and take place the jamming when the inslot removes.

(III) the beneficial effects are as follows:

compared with the prior art, the utility model has the following beneficial effects: through set up the syringe needle in the trocar, set up the lantern ring that can rotate on the outer wall of trocar, the lantern ring is connected with the locating plate, set up on the locating plate and slide into the way, the screens groove, keep off the wall, dog and slide out the way, the top of syringe needle sets up the crooked syringe needle that has a plurality of liquid hole, be equipped with the L type elasticity slide bar that has the inserted bar on the syringe needle, the top of inserted bar can slide into the way, move on screens groove and the slide out way, set up compression spring between locating plate and the L type elasticity slide bar, the depth of insertion and the angle of regulation crooked syringe needle in the tumour that can be convenient, and carry out even medicine injection through going out the liquid hole to different positions in the tumour, improve the homogeneity and the effective dose of medicine distribution in the tumour, show and improve treatment, and effectively reduce percutaneous puncture number of times, alleviate patient's misery.

Description of the drawings:

in order to more clearly illustrate the technical solution in the embodiments of the present invention, the drawings required to be used in the embodiments will be briefly described below.

FIG. 1 is a front view of a curved bore needle for intratumoral uniform injection according to an embodiment of the present invention;

FIG. 2 is a longitudinal cross-sectional view of a curved bore needle for intratumoral uniform injection according to an embodiment of the present invention;

FIG. 3 is a transverse cross-sectional view of a curved bore needle for intratumoral uniform injection according to an embodiment of the present invention;

FIG. 4 is an enlarged partial cross-sectional view of a curved bore needle for uniform intratumoral injection according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of the positioning plate of the curved-hole needle for uniform injection in tumors according to the embodiment of the present invention;

FIG. 6 is a schematic diagram of the movement track of the insertion rod of the curved-hole needle for uniform injection in tumor according to the embodiment of the present invention;

in the figure: 1. a trocar; 2. an injection needle; 3. an annular groove; 4. a collar; 5. a support bar; 6. positioning a plate; 7. sliding into the way; 8. a clamping groove; 81. a clamping groove A; 82. a clamping groove B; 9. a retaining wall; 91. a blocking wall A; 92. a blocking wall B; 10. a stopper; 101. a block A; 102. a stop block B; 11. sliding out of the way; 12. a wedge-shaped protrusion; 13. bending the needle head; 14. a liquid outlet hole; 15. clamping teeth; 16. an L-shaped elastic sliding rod; 17. an insertion rod; 171. fixing the rod; 172. a telescopic rod; 173. a chute; 174. a spring; 18. a compression spring; 19. an elastic washer; 20. anti-skid lines

The specific implementation mode is as follows:

the technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

As shown in figures 1, 2, 3 and 4, fig. 5 and fig. 6 show a even injection curved hole needle in tumour, including trocar 1 and syringe needle 2, be equipped with ring channel 3 on trocar 1's the outer wall, be equipped with the lantern ring 4 in the ring channel 3, the lantern ring 4 is connected with locating plate 6 through bracing piece 5, be equipped with on the locating plate 6 and slide in way 7, screens groove 8, keep off wall 9, dog 10 and slip out way 11, trocar 1's inner wall is equipped with a plurality of wedge arch 12 along the circumferencial direction, syringe needle 2's top is equipped with crooked syringe needle 13, be equipped with a plurality of on the crooked syringe needle 13 and go out liquid hole 14, syringe needle 2's tail end is equipped with the latch 15 with wedge arch 12 complex, be equipped with L type elasticity slide bar 16 on syringe needle 2, L type elasticity slide bar 16's top is equipped with insert rod 17, insert rod 17's top is just to locating plate 6, be equipped with compression spring 18 between locating plate 6's the side and the L type elasticity slide bar 16.

Preferably, the slide-in passage 7 is S-shaped, the slide-out passage 11 is straight, the stopper groove 8 is divided into a stopper groove a81 and a stopper groove B82, the stopper 10 is divided into a stopper a101 and a stopper B102, the stopper wall 9 is divided into a stopper wall a91 and a stopper wall B92, the stopper groove a81 has a depth greater than that of the slide-in passage 7 and smaller than that of the slide-out passage 11, the slide-out passage 11 has a certain inclination, the stopper groove B82 has a depth equal to the deepest part of the slide-out passage 11, the stopper wall B92 is located in the stopper groove B82, the stopper wall a91 is located at the boundary between the lowest part of the slide-out passage 11 and the slide-in passage 7, the insertion rod 17 slides along the slide-in passage 7 by pushing the needle 2 to change the running track after being stopped by the stopper wall 9, the tip of the insertion rod 17 enters the stopper groove a81 or the stopper groove B82, respectively, and the insertion rod 17 is stopped by the elastic force of the compression spring 18 after pushing, the insertion depth of the injection needle 2 is fixed, so that the operation of injecting the medicine is convenient, after the injection is finished, the injection needle 2 is continuously pushed, the insertion rod 17 enters the sliding passage 11, the injection needle 2 is loosened, the insertion rod 17 is moved out of the positioning plate 6 from the sliding passage 11 under the elastic action of the compression spring 18, and the injection needle 2 is conveniently pulled out of the tumor.

Preferably, the insertion rod 17 is divided into a fixed rod 171 and an expansion rod 172, a sliding groove 173 is arranged in the fixed rod 171, one end of the expansion rod 172 is located in the sliding groove 173 and is connected with the inner wall of the sliding groove 173 through a spring 174, the expansion rod 172 can move in the sliding groove 173 under the elastic force action of the spring 174, and when the insertion rod 17 moves in the sliding-in channel 7, the clamping groove 8 and the sliding-out channel 11 at different depths, the top end of the expansion rod 172 is always attached to the bottoms of the sliding-in channel 7, the clamping groove 8 and the sliding-out channel 11, so that the accurate positioning of the injection needle 2 is ensured.

Preferably, the elastic washers 19 are disposed on both sides of the collar 4 to ensure a certain friction force between the collar 4 and the annular groove 3, so as to prevent the collar 4 from freely rotating in the annular groove 3.

Preferably, the outer wall of the tail end of the injection needle 2 is provided with anti-slip lines 20, so that an operator can conveniently rotate the angle of the injection needle 2, and the hand slip is avoided.

Preferably, the latch 15 is made of elastic rubber, and has certain elasticity, so that the latch 15 can be conveniently rotated and positioned between the wedge-shaped protrusions 12.

Preferably, the L-shaped elastic sliding rod 16 is made of PE plastic, has suitable hardness and elasticity, and can deform with the movement of the insertion rod 17 to avoid the insertion rod 17 from being stuck when moving in the slide-in channel 7, the blocking groove 8 and the slide-out channel 11.

The use method of the curved-hole needle for intratumoral uniform injection comprises the following steps:

inserting the trocar 1 into the patient, inserting the needle head into the position close to the edge of the tumor, fixing the trocar 1, penetrating the injection needle 2 through the trocar 1, inserting the bent needle head 13 into the tumor, attaching the top end of the insertion rod 17 at the top end of the L-shaped elastic sliding rod 16 to the bottom of the sliding channel 7 on the positioning plate 6, inserting the latch 15 into the gap between the wedge-shaped protrusions 12 to circumferentially position the injection needle 2, then pushing the injection needle 2, sliding the insertion rod 17 along the sliding channel 7 due to the blocking effect of the blocking wall A91, entering the blocking groove A81 or the blocking groove B82 by the insertion rod 17 according to the depth of the pushed injection needle 2, stopping pushing the injection needle 2, blocking the insertion rod 17 by the block A101 or the block B102 under the elastic force of the compression spring 18, fixing the insertion depth of the injection needle 2, connecting the injection needle 2 with the injector to inject medicine, continuing to push the injection needle 2, the inserting rod 17 is blocked by the blocking wall B92 until the direction is changed to enter the sliding channel 11, the injection needle 2 is loosened, and the inserting rod 17 slides out of the sliding channel 11 under the action of the elastic force of the compression spring 18, so that the injection needle 2 is convenient to return into the trocar 1; the anti-slip pattern 20 is pinched to rotate the injection needle 2, so that the latch 15 slides into the gap between the adjacent wedge-shaped protrusions 12, the lantern ring 4, the positioning plate 6 and the L-shaped elastic sliding rod 17 rotate along with the injection needle 2, and the bent needle 13 rotates along the circumferential direction of the trocar 1, thereby realizing the adjustment of the injection angle. When injecting the medicine, the medicine carries out even injection in to the tumour through going out liquid hole 14, promotes syringe needle 2 and removes along trocar 1, can adjust the depth of insertion of syringe needle 2, and insert pole 17 is blocked by wall 9 and dog 10 in screens groove 8 to fix a position the inserted position of syringe needle 2, thereby realize the even injection of medicine of syringe needle 2 different degree of depth positions in the tumour, and effectively reduce the number of times of percutaneous puncture, alleviate patient's misery.

In conclusion, the curved hole needle for uniform injection in tumor provided by the utility model is used for medicine injection in tumor, and solves the problems that the position of a needle head cannot be adjusted in tumor under one puncture operation, and the medicine is difficult to be injected to different positions in tumor uniformly only by releasing the medicine from the head end of the needle head, so that the treatment effect is influenced in the prior art.

The present invention has been described above by way of example, but the present invention is not limited to the above-described specific embodiments, and any modification or variation made based on the present invention is within the scope of the present invention as claimed.

Claims (7)

1. The utility model provides a homogeneous injection curved hole needle in tumour, includes trocar and syringe needle, its characterized in that: be equipped with the ring channel on the outer wall of trocar, be equipped with the lantern ring in the ring channel, the lantern ring is connected with the locating plate through the bracing piece, be equipped with on the locating plate and slide into way, screens groove, keep off wall, dog and slide out and say, the inner wall of trocar is equipped with a plurality of wedge arch along the circumferencial direction, the top of syringe needle is equipped with crooked syringe needle, be equipped with a plurality of on the crooked syringe needle and go out the liquid hole, the tail end of syringe needle be equipped with the protruding complex latch of wedge, be equipped with L type elasticity slide bar on the syringe needle, the top of L type elasticity slide bar is equipped with the inserted bar, the top of inserted bar is just right the locating plate, the side of locating plate with be equipped with compression spring between the L type elasticity slide bar.

2. The curved-bore needle for intratumoral homogeneous injection according to claim 1, characterized in that: the slide-in channel is S-shaped, the slide-out channel is straight, the clamping groove is divided into a clamping groove A and a clamping groove B, the stop block is divided into a stop block A and a stop block B, the stop wall is divided into a stop wall A and a stop wall B, the depth of the clamping groove A is larger than that of the slide-in channel and smaller than that of the slide-out channel, the slide-out channel has a certain gradient, the depth of the clamping groove B is the same as that of the deepest part of the slide-out channel, the stop wall B is positioned in the clamping groove B, and the stop wall A is positioned at the junction of the minimum depth part of the slide-out channel and the slide-in channel.

3. The curved-bore needle for intratumoral homogeneous injection according to claim 1, characterized in that: the inserting rod is divided into a fixed rod and a telescopic rod, a sliding groove is formed in the fixed rod, and one end of the telescopic rod is located in the sliding groove and connected with the inner wall of the sliding groove through a spring.

4. The curved-bore needle for intratumoral homogeneous injection according to claim 1, characterized in that: elastic washers are arranged on two sides of the lantern ring.

5. The curved-bore needle for intratumoral homogeneous injection according to claim 1, characterized in that: the outer wall of the tail end of the injection needle is provided with anti-skid grains.

6. The curved-bore needle for intratumoral homogeneous injection according to claim 1, characterized in that: the latch is elastic rubber.

7. The curved-bore needle for intratumoral homogeneous injection according to claim 1, characterized in that: the L-shaped elastic sliding rod is made of PE plastic.

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