Medicine-injectable foramen ovale puncture needle

Abstract

The utility model discloses an oval foramen puncture needle capable of injecting medicine. The oval foramen puncture needle comprises a needle sheath part and a needle core part, the needle sheath part comprises a needle sheath and a needle sheath seat; the needle sheath seat is arranged at the tail of the needle sheath; a guide groove communicated with the needle sheath is formed in the needle sheath seat; the needle core part comprises a needle core and a needle core seat; the needle core is of a hollow structure; a medicine injection hole communicated with the inner cavity of the needle core is formed in the front end of the needle core; the needle core seat is arranged at the tail of the needle core; a limiting block matched with the guide groove is arranged on the needle core; a limiting groove matched with the limiting block is formed in the tail end of the needle sheath base. And the limiting grooves and the guide grooves are crossed. The utility model integrates the functions of puncture and medicine injection, can inject medicine into the body of a patient at any time in the puncture process, simultaneously integrates the puncture needle core and the pre-expansion balloon channel needle core into one needle core, correspondingly limits the needle inserting length at different use stages, can enable the needle core to pre-expand the balloon channel and infiltrate along with anesthetic, realizes painless treatment, and is convenient to use. The stress reaction in the operation is reduced, so that the number of instruments in the operation is reduced, and the use steps are simplified.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, and more specifically to an injectable patent foramen ovale puncture needle. Background Art

[0002] Trigeminal neuralgia is the most common cranial nerve disease. The characteristics of this disease are sudden onset, sudden arrest, lightning-like, knife-like, burning-like, intractable, and unbearable severe pain in the distribution area of the trigeminal nerve in the head and face. Even speaking, washing the face, brushing the teeth, a gentle breeze on the face, or even walking can cause paroxysmal severe pain. The pain lasts for several seconds or minutes and occurs cyclically, and the interictal period is the same as that of normal people.

[0003] Common domestic clinical surgical methods include percutaneous microballoon compression, microvascular decompression, and radiofrequency thermocoagulation. Among them, percutaneous microballoon compression is to introduce a balloon into the trigeminal ganglion in Meckle's cavity through a sheath under CT, and then slowly inject contrast agent to fill the balloon, relieve the compression of the nerve fibers causing trigeminal neuralgia, and destroy them by compression of the expanded microballoon, so as to treat trigeminal neuralgia and achieve the purpose of relieving pain.

[0004] Patients undergoing percutaneous microballoon compression are mainly operated under general anesthesia. According to the literature, during the puncture process of some surgeries, abnormal nerve reflexes may cause intraoperative stress reactions such as respiratory arrest and accelerated heartbeat in patients, affecting the surgical operation and endangering the life safety of patients. Research shows that injecting anesthetic to infiltrate the trigeminal ganglion in Meckel's sac before the puncture needle touches the trigeminal nerve root can avoid stress reactions during puncture or balloon compression.

[0005] Therefore, how to provide an injectable patent foramen ovale puncture needle that can integrate the functions of puncture and injection is one of the technical problems urgently to be solved in this field. Summary of the Utility Model

[0006] In view of this, the utility model provides an injectable patent foramen ovale puncture needle, and the purpose is to solve the problems existing in the prior art.

[0007] To solve the above technical problems, the utility model adopts the following technical solutions:

[0008] A medicable patent foramen ovale puncture needle, comprising: a needle sheath portion and a stylet portion; the needle sheath portion includes a needle sheath and a needle sheath seat; the needle sheath seat is arranged at the tail of the needle sheath; a guide groove communicating with the needle sheath is arranged inside the needle sheath seat; the stylet portion includes a stylet and a stylet seat; the stylet is of a hollow structure inside; a medicating hole communicating with the inner cavity of the stylet is arranged at the front end of the stylet; the stylet seat is arranged at the tail of the stylet; a limiting block adapted to the guide groove is arranged on the stylet; a limiting groove adapted to the limiting block is arranged at the tail end of the needle sheath seat; the limiting groove and the guide groove are arranged crosswise.

[0009] Preferably, scale lines are arranged on the outer surface of the needle sheath.

[0010] Preferably, two elastic clamping plates are symmetrically arranged at the front end of the stylet seat; the clamping plates are arranged parallel to the limiting block; a limiting plate is arranged on one side of each clamping plate away from the stylet seat; a clamping block is arranged on one side of each limiting plate close to the stylet seat; a limiting boss is arranged at the tail end of the needle sheath seat; a clamping groove adapted to the clamping block is arranged on the limiting boss; the number of the clamping grooves is the same as that of the clamping blocks and they are arranged in one-to-one correspondence.

[0011] Preferably, avoiding straight edges are symmetrically arranged on the limiting boss; the avoiding straight edges are arranged parallel to the guide groove.

[0012] Preferably, an extension tube is arranged on the stylet seat; the extension tube communicates with the inner cavity of the stylet; a connector is arranged at one end of the extension tube away from the stylet seat.

[0013] Preferably, a heparin cap is arranged at the tail end of the stylet seat; the heparin cap communicates with the inner cavity of the stylet.

[0014] The utility model has achieved the following technical effects compared with the prior art:

[0015] 1) By arranging a hollow stylet and a medicating hole inside the utility model, drugs can be injected into the patient's body at any time. Meanwhile, by arranging a limiting groove, a guide groove and a limiting block, after the puncture needle reaches the position of the foramen ovale, the needle sheath can be fixed, and the stylet seat can be rotated by a certain angle, and then the stylet can be pushed forward for a certain distance, so as to send the anesthetic to the trigeminal ganglion and blood vessels inside the Meckle's cavity, reduce the stress reaction of nerves or blood vessels, realize painless treatment, reduce the infection risk and improve the success rate of the operation;

[0016] 2) By evenly arranging a plurality of medicating holes at the front end of the stylet in the utility model, the drug administration can be made more uniform, which is beneficial to the operation;

[0017] 3) By integrating the puncture stylet and the pre-dilation balloon channel stylet into one stylet and restricting the needle insertion length corresponding to different use stages in the utility model, the intraoperative instruments can be reduced and the use steps can be simplified;

[0018] 4) The utility model pre - expands the balloon channel through the needle core and infiltrates anesthetic, realizing painless treatment and reducing intraoperative stress response. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of an injectable type foramen ovale puncture needle in the normal puncture state of Embodiment 1 of the utility model;

[0020] Figure 2 It is a schematic structural diagram of an injectable type foramen ovale puncture needle in the state where the front end of the needle core enters the Meckle's cavity of Embodiment 1 of the utility model;

[0021] Figure 3 It is an axonometric view of the needle sheath part and the needle core part;

[0022] Figure 4 It is a schematic structural diagram of the needle sheath part;

[0023] Figure 5 It is a schematic structural diagram of the needle sheath seat part;

[0024] Figure 6 It is a schematic structural diagram of the needle core part;

[0025] Figure 7 It is a partial enlarged view of the front end of the needle core;

[0026] Figure 8 It is a schematic structural diagram of the needle core seat part;

[0027] Figure 9 It is a schematic structural diagram of an injectable type foramen ovale puncture needle in the state where the front end of the needle core enters the Meckle's cavity of Embodiment 2 of the utility model;

[0028] In the figure: 1. Needle sheath part; 11. Needle sheath; 12. Needle sheath seat; 13. Guide groove; 14. Limit groove; 15. Scale line; 16. Limit boss; 17. Card slot; 18. Avoidance straight edge; 2. Needle core part; 21. Needle core; 22. Needle core seat; 23. Medication injection hole; 24. Limit block; 25. Splint; 26. Limit plate; 27. Card block; 3. Extension tube; 4. Connector; 5. Heparin cap. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0030] For the surgical operation of treating trigeminal neuralgia by conventional percutaneous balloon compression, during the puncture process, when the tip of the puncture needle reaches the position of the foramen ovale, the advancement of the needle stops, the position of the needle sheath is fixed, and a slightly longer stylet is replaced and advanced along the needle sheath into the Meckel's cavity to pre-expand a passage for the balloon catheter, facilitating the entry of the balloon catheter into the Meckel's cavity. This is time-consuming and laborious, and the operation is cumbersome.

[0031] Embodiment 1

[0032] Referring to Figures 1-8 As shown, the present utility model discloses an injectable foramen ovale puncture needle, comprising: a needle sheath part 1 and a stylet part 2; the needle sheath part 1 includes a needle sheath 11 and a needle sheath base 12; the needle sheath base 12 is arranged at the tail of the needle sheath 11; a guide groove 13 communicating with the needle sheath 11 is arranged inside the needle sheath base 12; the guide groove 13 penetrates through the tail end of the needle sheath base 12; the stylet part 2 includes a stylet 21 and a stylet base 22; the stylet 21 is adapted to the needle sheath 11; the stylet 21 is a hollow structure inside; the front end of the stylet 21 is a pointed structure; a plurality of injection holes 23 communicating with the inner cavity of the stylet 21 are arranged at the front end of the stylet 21; the plurality of injection holes are evenly distributed at the front end of the stylet 21, which is beneficial to uniformly injecting medicine into the tissues around the puncture needle; the stylet base 22 is arranged at the tail of the stylet 21; a limit block 24 adapted to the guide groove 13 is arranged on the stylet 21; a limit groove 14 adapted to the limit block 24 is arranged at the tail end of the needle sheath base 12; the limit groove 14 and the guide groove 13 are arranged in a perpendicular cross manner; during use, first insert the limit block 24 into the limit groove 14, and then perform the puncture. During the puncture process, medicine can be injected at any time, such as injecting anesthetic or antibiotic, which can achieve painless puncture or reduce the risk of infection. When the puncture needle reaches the foramen ovale position, pull the stylet base 22 backward to make the limit block 24 disengage from the limit groove 14, and then rotate the stylet base 22 to make the limit block 24 parallel to the guide groove 13. Push the stylet base 22 forward to make the limit block 24 move along the axis of the needle sheath 11 in the guide groove 13 until the front end of the stylet 21 enters the Meckel's cavity. In this way, it replaces the step of'replacing a slightly longer stylet to pre-expand the balloon channel' in the conventional operation. Then, inject anesthetic through the stylet 21, and the anesthetic is discharged from the injection holes 23 to paralyze the nerve and reduce the stress response of the nerve or blood vessel, achieving painless treatment and improving the surgical safety.

[0033] Through the hollow stylet and injection holes in the above technical solution, medicine can be injected into the patient's body at any time. At the same time, by setting the limit groove, guide groove and limit block, when the puncture needle reaches the foramen ovale position, the needle sheath can be fixed, and the stylet base is rotated by a certain angle, and the stylet can be further advanced forward for a certain distance, so that the medicine can be sent to the trigeminal ganglion and blood vessels inside the Meckel's cavity, reducing the stress response of the nerve or blood vessel, achieving painless treatment, reducing the risk of infection, and improving the surgical success rate.

[0034] In this embodiment, scale lines 15 are provided on the outer surface of the needle sheath 11 to facilitate observing the puncture depth.

[0035] In this embodiment, two elastic clamping plates 25 are symmetrically provided at the front end of the needle core seat 22 in the up and down directions; the clamping plates 25 are arranged parallel to the limiting block 24; a limiting plate 26 is provided on one side of each clamping plate 25 away from the needle core seat 22; a clamping block 27 is provided on one side of each limiting plate 26 close to the needle core seat 22; a limiting boss 16 is provided at the tail end of the needle sheath seat 12; a clamping groove 17 adapted to the clamping block 27 is formed on the limiting boss 16; the number of the clamping grooves 17 is the same as that of the clamping blocks 27 and they are arranged in one-to-one correspondence; during use, first insert the limiting block 24 into the limiting groove 14, and at the same time, snap the clamping block 27 into the clamping groove 17. At this time, the tail end of the limiting plate 26 abuts against the front end of the limiting boss 16, thereby realizing the locking of the needle core part 2. When it is necessary to continue to push the needle core 21 forward, open the front end of the clamping plate 25, pull the needle core seat 22 backward to separate the clamping block 27 from the clamping groove 17 and separate the limiting plate 26 from the limiting boss 16. Then rotate the needle core seat 22 by 90°, push the needle core seat 22 forward to make the limiting block 24 enter the guide groove 13, and then the needle core seat 22 can be continuously pushed until the front end of the needle core 21 reaches the appropriate position.

[0036] In this embodiment, avoiding straight edges 18 are symmetrically provided on the left and right sides of the limiting boss 16; the avoiding straight edges 18 are arranged parallel to the guide groove 13; by providing the avoiding straight edges 18, when it is necessary to continue to insert the needle, the limiting plate 26 is avoided to prevent interference between the limiting plate 26 and the limiting boss 16, and the operation convenience is improved.

[0037] In this embodiment, an extension tube 3 is provided on the needle core seat 22; the extension tube 3 is communicated with the inner cavity of the needle core 21; a connector 4 is provided at one end of the extension tube 3 away from the needle core seat 22. During use, connect the connector 4 to a pushing device such as a syringe or an injection pump to facilitate injecting drugs during the puncture process.

[0038] In this embodiment, both the needle sheath 11 and the needle core 21 are tubular structures.

[0039] In this embodiment, the materials of both the needle sheath 11 and the needle core 21 are medical-grade stainless steel.

[0040] In this embodiment, the material of the needle sheath seat 12 is medical plastic. Specifically, the material of the needle sheath seat 12 is selected as ABS.

[0041] In this embodiment, the needle sheath seat 12 and the needle sheath 11 are connected by means of bonding and then heat melting.

[0042] In this embodiment, the material of the needle core seat 22 is medical plastic. Specifically, the material of the needle core seat 22 is selected as ABS.

[0043] In this embodiment, the needle core seat 22 and the needle core 21 are connected by bonding and then heat melting.

[0044] In some other embodiments, the materials of the needle sheath 11 and the needle core 21 can also be selected from other metal materials that meet the requirements.

[0045] Embodiment 2

[0046] Refer to Figure 9 As shown, the difference between this embodiment and Embodiment 1 is that in this embodiment, a heparin cap 5 is provided at the tail end of the needle core seat 22; the heparin cap 5 is communicated with the inner cavity of the needle core 21; when injecting drugs, an injection needle is used to puncture the heparin cap 5 for drug delivery; in this embodiment, the heparin cap 5 is used to replace the extension tube 3 and the connector 4 for drug injection, making the structure simpler, preventing the extension tube from interfering with the surgical operation and the surgical field of view, and being more convenient to hold, improving the surgical convenience and being more beneficial for doctors to use.

[0047] The above are only preferred embodiments of the present invention, and do not limit the technical scope of the present invention. Therefore, any minor modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A drug-injectable foramen ovale puncture needle, characterized in that: include: A needle sheath portion (1) and a needle core portion (2); the needle sheath portion (1) comprises a needle sheath (11) and a needle sheath seat (12); the needle sheath seat (12) is arranged at the tail of the needle sheath (11); a guide groove (13) communicating with the needle sheath (11) is arranged inside the needle sheath seat (12); the needle core portion (2) comprises a needle core (21) and a needle core seat (22); the needle core (21) is an internal hollow structure; the needle core (2 1) A drug injection hole (23) communicating with the inner cavity of the needle core (21) is provided at the front end; the needle core seat (22) is arranged at the rear end of the needle core (21); a limit block (24) adapted to the guide groove (13) is provided on the needle core (21); a limit groove (14) adapted to the limit block (24) is provided at the rear end of the needle sheath seat (12); the limit groove (14) and the guide groove (13) are arranged crosswise.

2. The injectable foramen ovale puncture needle according to claim 1, characterized in that: The outer surface of the needle sheath (11) is provided with scale lines (15).

3. The injectable foramen ovale puncture needle according to claim 1, characterized in that: The front end of the needle core seat (22) is symmetrically provided with two elastic clamping plates (25); the clamping plates (25) are arranged in parallel with the limiting block (24); each of the clamping plates (25) is provided with a limiting plate (26) on the side away from the needle core seat (22); each of the limiting plates (26) is provided with a clamping block (27) on the side close to the needle core seat (22); the rear end of the needle sheath seat (12) is provided with a limiting boss (16); the limiting boss (16) is provided with a clamping groove (17) adapted to the clamping block (27); the number of the clamping grooves (17) and the clamping blocks (27) is the same, and they are arranged one-to-one.

4. The injectable foramen ovale puncture needle according to claim 3, characterized in that: The limiting boss (16) is symmetrically provided with avoidance straight edges (18); the avoidance straight edges (18) are arranged parallel to the guide groove (13).

5. The injectable foramen ovale puncture needle according to claim 1, characterized in that: An extension tube (3) is provided on the needle core seat (22); the extension tube (3) is in communication with the inner cavity of the needle core (21); and a connector (4) is provided at one end of the extension tube (3) away from the needle core seat (22).

6. The injectable foramen ovale puncture needle according to claim 1, characterized in that: A heparin cap (5) is provided at the rear end of the needle core seat (22); the heparin cap (5) is communicated with the inner cavity of the needle core (21).

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