Intercostal nerve block injection device

Abstract

The invention discloses an intercostal nerve block injection device, comprising a needle tube, a needle and a rotating injection seat, wherein one end of the needle tube is connected with the needle tube, a piston column is fixed to the inner wall of the other end of the needle tube, a rotating injection seat is arranged on the outer wall of the other end of the needle tube, a plurality of liquid discharge pinholes are provided on the needle tube, the plurality of liquid discharge pinholes are arranged circumferentially along the axis of the needle tube, the plurality of liquid discharge pinholes are all connected with the needle tube, a plurality of injection ports are provided on the piston column, the number of the injection ports is consistent with the number of the liquid discharge pinholes, the plurality of injection ports are arranged circumferentially along the axis of the piston column, the plurality of liquid discharge pinholes are all connected with different injection ports through liquid discharge pipes, the plurality of liquid discharge pipes are all located in the needle tube, a syringe tube connected with the needle tube is provided on the rotating injection seat, and the plurality of injection ports are all located on the rotating path of the syringe tube. It has a large anesthesia range, and avoids multiple puncture anesthesia to increase the patient's pain.

Description

Technical Field

[0001] The invention relates to the field of medical instruments for open chest surgery, in particular to an intercostal nerve block injection device. Background Art

[0002] As an invasive and large-scale surgery, open chest surgery is traumatic. Due to the inevitable damage to the intercostal nerves, the patient suffers from severe postoperative pain, which seriously limits the recovery of the patient's lung function after surgery. For example, the patient is unwilling to cough and take deep breaths, which leads to complications such as postoperative atelectasis, lung infection, and even respiratory failure and death. Western countries have conducted in-depth research on analgesia after open chest surgery and proposed a variety of schemes for postoperative analgesia, such as intramuscular injection, intravenous injection, percutaneous patient-controlled analgesia pump, intercostal nerve freezing, intermittent or continuous intercostal nerve block, epidural analgesia, oral analgesics, and the combined use of one or more of the above technologies. In the medical field, intercostal nerve block can be used to evaluate and treat pain in the chest wall and upper abdomen. For example, intercostal nerve block with local anesthetic is used to treat postoperative pain after thoracotomy, cancer pain, rib fractures, liver metastasis, and postherpetic neuralgia. The intercostal nerve originates from the anterior branch of the parathoracic nerve, runs along the lower edge of the rib, and runs with the intercostal artery and intercostal vein in the intercostal groove. Among them, intercostal nerve block is divided into three methods: intraoperative single block, intraoperative and postoperative intermittent block, and continuous block. First, an intercostal nerve puncture needle is used for nerve block anesthesia. The existing intercostal nerve puncture needle has a liquid outlet hole in one direction. This liquid outlet hole is located at the needle tip. The needle tip is inserted into the parietal pleural incision for anesthesia. The intercostal nerve puncture needle of this structure has a small anesthesia range, resulting in the intercostal nerves above and below the parietal pleural incision not being anesthetized, resulting in the inability to effectively reduce the patient's pain. At this time, it is necessary to puncture the intercostal nerves in different directions multiple times to anesthetize the intercostal nerves in different directions to expand the anesthesia range. This multiple puncture method will cause multiple trauma to the patient, and the anesthesia process is relatively cumbersome; therefore, it is necessary to design an injection device that can perform intercostal nerve anesthesia in multiple directions at the same time. Summary of the invention

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide an intercostal nerve block injection device with a larger anesthesia range to avoid multiple puncture anesthesia increasing the patient's pain.

[0004] The objective of the present invention is achieved through the following technical solutions: an intercostal nerve block injection device, comprising a needle tube, a needle and a rotating injection seat, one end of the needle tube is connected to the needle head, a piston column is fixed to the inner wall of the other end of the needle tube, the outer wall of the other end of the needle tube is provided with the rotating injection seat, a plurality of liquid outlet needle holes are provided on the needle head, the plurality of liquid outlet needle holes are arranged circumferentially along the axis of the needle head, the plurality of liquid outlet needle holes are all connected with the needle tube, a plurality of injection ports are provided on the piston column, the number of the injection ports is consistent with the number of the liquid outlet needle holes, the plurality of injection ports are arranged circumferentially along the axis of the piston column, the plurality of liquid outlet needle holes are all connected with different injection ports through liquid outlet tubes, the plurality of liquid outlet tubes are all located in the needle tube, an injection tube communicating with the needle tube is provided on the rotating injection seat, and the plurality of injection ports are all located on the rotation path of the injection tube.

[0005] Furthermore, the rotating injection seat comprises a circular fixed seat and a circular rotating seat, the circular fixed seat is fixedly sleeved on the needle tube, the circular rotating seat is rotatably sleeved on the circular fixed seat, and the injection tube is opened on the circular rotating seat.

[0006] Furthermore, the end of the needle tube contacts the top of the inner cavity of the circular rotating seat.

[0007] Furthermore, a plurality of mounting holes are provided on the outer wall of the circular fixed seat, and the plurality of mounting holes are evenly distributed around the circumference, and the number of the mounting holes is consistent with the number of the liquid outlet needle holes. Balls are movably arranged in the plurality of mounting holes, and a spring is arranged in the mounting hole, and one end of the spring is connected to the ball, and the ball portion is located outside the mounting hole. A plurality of ball grooves are provided on the inner wall of the circular rotating seat, and the plurality of ball grooves are evenly distributed around the circumference, and the number of the ball grooves is consistent with the number of the mounting holes. The ball is matched with the ball groove, and when the ball is matched with the ball groove, the injection tube is connected with one of the injection ports.

[0008] Furthermore, the needle head includes a liquid outlet portion and a needle tip portion, the liquid outlet portion is drum-shaped with a larger outer diameter in the middle and smaller outer diameters at both ends, one end of the liquid outlet portion is smoothly connected to the needle tube, and the other end is smoothly connected to the needle tip portion, and the liquid outlet needle hole is opened at the point where the outer diameter of the liquid outlet portion is the largest.

[0009] Furthermore, the number of the liquid outlet needle holes is four, and the four liquid outlet needle holes are evenly distributed along the circumference of the axis of the needle tube.

[0010] Furthermore, a needle hole connected to the needle tube is formed at one end of the needle tip portion away from the liquid outlet portion, a needle tip injection port is formed in the middle of the piston column, the needle hole is connected to the needle tip injection port through a needle tip tube, a needle tip injection tube connected to the needle tube is formed in the middle of the rotating injection seat, the needle tip injection tube is concentrically arranged with the needle tip injection port, and the rotating injection seat is concentrically arranged with the needle tube.

[0011] Furthermore, the outer wall of the circular rotating seat is provided with anti-slip grooves.

[0012] The beneficial effects of the present invention are:

[0013] 1. An intercostal nerve block injection device, wherein a plurality of discharge needle holes in different directions are provided on the needle head, so that intercostal nerves in different directions can be anesthetized by one puncture anesthesia. Each discharge needle hole discharges liquid separately, and by rotating the rotary injection seat, the injection tube on it is connected with different injection ports, so that the corresponding discharge needle hole discharges liquid anesthesia, making the anesthesia direction controllable and the discharge direction more flexible.

[0014] 2. Under normal circumstances, the rotation of the circular rotating seat is limited by the adaptation of the ball and the ball groove, so that the injection tube corresponds to one of the injection ports. When the liquid discharge direction needs to be changed, the circular rotating seat is rotated to make the ball squeeze the inner wall of the ball groove. This squeezing force is decomposed on the spherical surface of the ball, so that the ball is subjected to a force perpendicular to the axis of the circular rotating seat. Under the action of this decomposed force, the ball compression spring is moved to the mounting hole, so that the circular rotating seat can rotate smoothly. When the ball rotates to adapt to other ball grooves, the injection tube is connected to other injection ports, which makes it easier to control the liquid discharge direction, making the anesthesia direction controllable, and different multiple anesthesia can achieve multi-directional anesthesia. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A stereoscopic diagram of an intercostal nerve block injection device of the present invention;

[0016] Figure 2 It is a schematic diagram of the internal structure of an intercostal nerve block injection device of the present invention;

[0017] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0018] Figure 4 for Figure 2 Enlarged view of point B in the middle;

[0019] In the figure, 1-needle tube, 2-needle, 3-rotating injection seat, 4-liquid outlet needle hole, 5-injection port, 6-liquid outlet tube, 7-injection tube, 8-circular fixed seat, 9-circular rotating seat, 10-mounting hole, 11-ball, 12-ball groove, 13-liquid outlet part, 14-needle tip part, 15-needle hole, 16-needle tip injection port, 17-needle tip tube, 18-needle tip injection tube, 19-piston column, 20-spring. DETAILED DESCRIPTION

[0020] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following.

[0021] like Figures 1 to 4 As shown, an intercostal nerve block injection device includes a needle tube 1, a needle 2 and a rotating injection seat 3, one end of the needle tube 1 is connected to the needle 2, the inner wall of the other end of the needle tube 1 is fixed with a piston column 19, the outer wall of the other end of the needle tube 1 is provided with a rotating injection seat 3, a plurality of liquid outlet needle holes 4 are provided on the needle 2, the plurality of liquid outlet needle holes 4 are arranged in a circle along the axis of the needle 2, the plurality of liquid outlet needle holes 4 are all connected with the needle tube 1, a plurality of injection ports 5 are provided on the piston column 19, the number of the injection ports 5 is consistent with the number of the liquid outlet needle holes 4, the plurality of injection ports 5 are arranged in a circle along the axis of the piston column 19, the plurality of liquid outlet needle holes 4 are all connected with different injection ports 5 through liquid outlet pipes 6, the plurality of liquid outlet pipes 6 are all located in the needle tube 1, an injection tube 7 communicated with the needle tube 1 is provided on the rotating injection seat 3, and the plurality of injection ports 5 are all located on the rotation path of the injection tube 7. The needle 2 is provided with a plurality of fluid outlet holes 4 in different directions, so that a single puncture anesthesia can be used to anesthetize the intercostal nerves in different directions. Each fluid outlet hole 4 discharges fluid independently, and by rotating the rotary injection seat 3, the injection tube 7 thereon is connected to different injection ports 5, so that the corresponding fluid outlet hole 4 discharges fluid for anesthesia, making the anesthesia direction controllable and the fluid outlet direction more flexible.

[0022] Furthermore, if Figures 2 to 4 As shown, the rotating injection seat 3 includes a circular fixed seat 8 and a circular rotating seat 9. The circular fixed seat 8 is fixedly mounted on the needle tube 1, and the circular rotating seat 9 is rotatably mounted on the circular fixed seat 8. The injection tube 7 is opened on the circular rotating seat 9, and the end of the needle tube 1 contacts the top of the inner cavity of the circular rotating seat 9. During implementation, the top of the piston column 19 is flush with the end of the needle tube 1, so that the top of the piston column 19 contacts the top of the inner cavity of the circular rotating seat 9, so that the needle tip of the injection needle can smoothly penetrate into the injection port 5 through the injection tube 7, avoiding the distance between the injection port 5 and the top of the injection tube 7 being greater than the length of the injection needle tip, resulting in the needle tip of the injection needle being unable to penetrate into the injection port, affecting the injection effect; the injection tube 7 is driven to rotate by rotating the circular rotating seat 9, so that the injection tube 7 is connected to different injection ports 5, so that the anesthesia direction can be rotated as needed, and unidirectional anesthesia or multi-directional simultaneous anesthesia is performed, thereby improving the anesthesia range.

[0023] Furthermore, a plurality of mounting holes 10 are provided on the outer wall of the circular fixed seat 8, and the plurality of mounting holes 10 are evenly distributed around the circumference, and the number of mounting holes 10 is consistent with the number of liquid outlet needle holes 4. Balls 11 are movably provided in the plurality of mounting holes 10, and a spring 20 is provided in the mounting hole 10. One end of the spring 20 is connected to the ball 11, and part of the ball 11 is located outside the mounting hole 10. A plurality of ball grooves 12 are provided on the inner wall of the circular rotating seat 9, and the plurality of ball grooves 12 are evenly distributed around the circumference, and the number of the ball grooves 12 is consistent with the number of mounting holes 10. The ball 11 is matched with the ball groove 12, and when the ball 11 is matched with the ball groove 12, the injection tube 7 is connected with one of the injection ports 5. When the spring 20 is in a normal state, the ball 11 is matched with the ball groove 12. Under normal conditions, the rotation of the circular rotating seat 9 is limited by the matching of the ball 11 and the ball groove 12, so that the injection tube 7 corresponds to one of the injection ports 5. When the liquid discharge direction needs to be changed, the circular rotating seat 9 is rotated to make the ball 11 squeeze the inner wall of the ball groove 12. This squeezing force is decomposed on the spherical surface of the ball 11, so that the ball is subjected to a force perpendicular to the axial direction of the circular rotating seat 9. Under the action of this decomposed force, the ball 11 compresses the spring 20 and moves it into the mounting hole 10, so that the ball 11 is separated from the ball groove 12, so that the circular rotating seat 9 can rotate smoothly. When the ball 11 rotates to a position facing the other ball grooves 12, under the reaction force of the spring 20, the ball 11 is ejected into the ball groove 12, completing the matching of the ball 11 and the ball groove 12. At this time, the injection tube 7 is connected to the other injection ports 5, which is convenient for controlling the liquid discharge direction, making the anesthesia direction controllable, and different multiple anesthesia can achieve multi-directional anesthesia.

[0024] Furthermore, if Figure 1 and Figure 4 As shown, the needle 2 includes a liquid outlet portion 13 and a needle tip portion 14. The liquid outlet portion 13 is drum-shaped with a larger outer diameter in the middle and smaller outer diameters at both ends. One end of the liquid outlet portion 13 is smoothly connected to the needle tube 1, and the other end is smoothly connected to the needle tip portion 14. The liquid outlet needle hole 4 is opened at the largest outer diameter of the liquid outlet portion 13. There are four liquid outlet needle holes 4, and the four liquid outlet needle holes 4 are evenly distributed in a circle along the axis of the needle tube 1. After thoracic surgery, a surgical incision is left in the chest cavity. In order to reduce the patient's pain, the intercostal nerves are anesthetized through the injection device of this scheme, and the needle tip 14 is inserted from the pleural incision. A smooth transition is adopted at the connection between the needle tip 14 and the liquid outlet 13, so that the liquid outlet 13, which is larger in size than the needle tip 14, can smoothly penetrate the pleural incision, which can reduce the patient's pain. Then, the intercostal nerves above the incision are anesthetized through the liquid outlet needle hole 4 located above the pleural incision, and the intercostal nerves below the incision are anesthetized through the liquid outlet needle hole 4 located below the pleural incision, thereby expanding the anesthesia range and reducing the number of insertions. It is worth noting that the insertion end of the needle tip 14 adopts a blunt head, which can prevent accidental injury to blood vessels during blind operation and increase the safety performance of the device.

[0025] Furthermore, if Figure 3 and Figure 4 As shown, a needle hole 15 communicating with the needle tube 1 is formed at one end of the needle tip portion 14 away from the liquid outlet portion 13, a needle tip injection port 16 is formed in the middle of the piston column 19, the needle hole 15 is connected with the needle tip injection port 16 through a needle tip tube 17, a needle tip injection tube 18 communicating with the needle tube 1 is formed in the middle of the rotating injection seat 3, the needle tip injection tube 18 is concentrically arranged with the needle tip injection port 16, the rotating injection seat 3 is concentrically arranged with the needle tube 1, and the outer wall of the circular rotating seat 9 is provided with anti-slip patterns. The injection needle can be inserted into the needle tip injection port 16 through the needle tip injection tube 18, and then the anesthetic is delivered through the needle tip tube 17, and finally discharged from the needle hole 15, and fixed-point anesthesia is achieved through the needle hole 15, that is, the insertion position is anesthetized, thereby effectively and accurately anesthetizing the pleural incision; this scheme performs fixed-point anesthesia through the needle hole 15, and performs multi-directional diffuse anesthesia through the multi-directional liquid outlet needle holes 4. The fixed-point anesthesia through the needle hole 15 can be applied to general anesthesia, and the diffuse anesthesia of the intercostal nerves can be performed through the liquid outlet needle hole 4, so that the injection device of the present invention has a wider range of applications.

[0026] The above is only a preferred embodiment of the present invention. It should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art shall not deviate from the spirit and scope of the present invention, and shall be within the scope of protection of the claims attached to the present invention.

Claims

1. An intercostal nerve block injection device, characterized in that: The invention comprises a needle tube (1), a needle head (2) and a rotating injection seat (3), wherein one end of the needle tube (1) is connected to the needle head (2), a piston column (19) is fixed to the inner wall of the other end of the needle tube (1), and the rotating injection seat (3) is arranged on the outer wall of the other end of the needle tube (1), and a plurality of liquid outlet needle holes (4) are formed on the needle head (2), and the plurality of liquid outlet needle holes (4) are arranged in a circle along the axis of the needle head (2), and the plurality of liquid outlet needle holes (4) are all connected to the needle tube (1), and a piston column (19) is formed on the inner wall of the other end of the needle tube (1). a plurality of injection ports (5), the number of the injection ports (5) being the same as the number of the liquid outlet needle holes (4), the plurality of injection ports (5) being arranged in a circle along the axis of the piston column (19), the plurality of liquid outlet needle holes (4) being connected to different injection ports (5) via liquid outlet tubes (6), the plurality of liquid outlet tubes (6) being located in the needle tube (1), the rotating injection seat (3) being provided with an injection tube (7) communicating with the needle tube (1), the plurality of injection ports (5) being located on the rotation path of the injection tube (7); The rotating injection seat (3) comprises a circular fixed seat (8) and a circular rotating seat (9), wherein the circular fixed seat (8) is fixedly sleeved on the needle tube (1), and the circular rotating seat (9) is rotatably sleeved on the circular fixed seat (8), and the injection tube (7) is opened on the circular rotating seat (9); The outer wall of the circular fixed seat (8) is provided with a plurality of mounting holes (10), the plurality of mounting holes (10) are evenly distributed around the circumference, the number of the mounting holes (10) is the same as the number of the liquid outlet needle holes (4), a ball (11) is movably arranged in each of the plurality of mounting holes (10), a spring (20) is arranged in the mounting hole (10), one end of the spring (20) is connected to the ball (11), and a portion of the ball (11) is located outside the mounting hole (10), the inner wall of the circular rotating seat (9) is provided with a plurality of ball grooves (12), the plurality of ball grooves (12) are evenly distributed around the circumference, the number of the ball grooves (12) is the same as the number of the mounting holes (10), the ball (11) is matched with the ball grooves (12), and when the ball (11) is matched with the ball grooves (12), the injection tube (7) is communicated with one of the injection ports (5); The needle (2) comprises a liquid outlet portion (13) and a needle tip portion (14); the liquid outlet portion (13) is drum-shaped with a larger outer diameter in the middle and smaller outer diameters at both ends; one end of the liquid outlet portion (13) is smoothly connected to the needle tube (1), and the other end is smoothly connected to the needle tip portion (14); the liquid outlet needle hole (4) is provided at the position where the outer diameter of the liquid outlet portion (13) is the largest.

2. An intercostal nerve block injection device according to claim 1, characterized in that: The end of the needle tube (1) contacts the top of the inner cavity of the circular rotating seat (9).

3. The intercostal nerve block injection device according to claim 1, characterized in that: The number of the liquid outlet needle holes (4) is four, and the four liquid outlet needle holes (4) are evenly distributed in a circle along the axis of the needle tube (1).

4. The intercostal nerve block injection device according to claim 1, characterized in that: A needle hole (15) communicating with the needle tube (1) is formed at one end of the needle tip portion (14) away from the liquid outlet portion (13); a needle tip injection port (16) is formed in the middle of the piston column (19); the needle hole (15) is communicated with the needle tip injection port (16) through a needle tip tube (17); a needle tip injection tube (18) communicating with the needle tube (1) is formed in the middle of the rotating injection seat (3); the needle tip injection tube (18) is concentrically arranged with the needle tip injection port (16); and the rotating injection seat (3) is concentrically arranged with the needle tube (1).

5. The intercostal nerve block injection device according to claim 1, characterized in that: The outer wall of the circular rotating seat (9) is provided with anti-slip grooves.

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