Urethra administration device for urinary surgery

Abstract

The urethra dosing device comprises a syringe, a pushing and injecting mechanism, a medicine guiding pipe, a liquid feeding pipe, an annular plate and a switching assembly, the pushing and injecting mechanism is connected with the syringe, one end of the medicine guiding pipe is fixed to the front end of the syringe, a guiding head is fixed to the other end of the medicine guiding pipe, a dosing hole is formed in the side wall of the medicine guiding pipe, and the liquid feeding pipe is connected with the annular plate. The liquid feeding pipe is sleeved with the medicine guide pipe, one end of the liquid feeding pipe is communicated with the syringe, the annular plate is fixed to the outer wall of the end, close to the guide head, of the liquid feeding pipe in a sleeving mode, an infusion channel is formed in the annular plate, and the switching assembly is used for enabling the infusion channel and the medicine feeding hole to be communicated or disconnected and comprises a sleeve, a plug, an elastic reset piece and a threaded sleeve. The on-off state of the infusion channel and the dosing hole can be controlled through the arranged switching assembly, when the dosing pipe is inserted, the infusion channel and the dosing hole are kept disconnected, bacteria and secretions are prevented from entering liquid medicine, and the infusion channel and the dosing hole are communicated only during dosing.

Description

Technical Field

[0001] The invention relates to the technical field of urology, in particular to a urethra medication device for urology. Background Art

[0002] Urology is a department that mainly diagnoses and treats urinary system diseases. It is also called urology for short. When treating diseases such as urethritis, prostatitis and urethral tumors in urology, urethral drug delivery devices are often used to inject drugs into the urethra.

[0003] A conventional urethral drug delivery device is usually composed of a syringe and a drug delivery tube. When in use, one end of the drug delivery tube is usually inserted into the patient's urethra, and then a syringe is used to inject the drug solution into the urethra through the drug delivery tube.

[0004] The male urethra is divided into the anterior urethra and the posterior urethra. Bacteria are not only distributed at the urethral opening, but the anterior urethra is also easily affected by bacteria. When administering drugs to the male urethra, usually only the urethral opening is disinfected, and it is difficult to disinfect the bacteria and secretions in the anterior urethra. In the process of moving the traditional drug delivery device to the patient's urethra, since the opening of the drug delivery tube is in an open state, the bacteria and secretions in the patient's anterior urethra will be carried into the drug delivery tube during the movement, causing the drug solution in the drug delivery device to be contaminated. As the drug delivery tube moves deeper, the drug contaminated with bacteria and secretions will be sent deep into the urethra, posing a risk of causing infection. Summary of the invention

[0005] The purpose of the present invention is to provide a urethral medication device for urology to solve the problem of bacterial contamination in the patient's urethra during medication of the current traditional urethral medication device.

[0006] The technical solution of the present invention is:

[0007] A urethral drug delivery device for urology surgery comprises a syringe, a push injection mechanism, a drug guide tube, a liquid delivery tube, an annular plate and a switching assembly, wherein the push injection mechanism is connected to the syringe, one end of the drug guide tube is fixed to the front end of the syringe, the other end of the drug guide tube is fixed with a guide head, and a drug delivery hole is provided on the side wall of the drug guide tube; the liquid delivery tube is sleeved in the drug guide tube, and one end of the liquid delivery tube is connected with the syringe; the annular plate is sleeved and fixed on the outer wall of the liquid delivery tube close to one end of the guide head, an infusion channel is provided on the annular plate, one end of the infusion channel faces the guide head, and the other end of the infusion channel faces the side wall of the drug guide tube; the switching assembly is used to switch the infusion channel The liquid channel and the drug administration hole are connected or disconnected, and the switching assembly includes a sleeve, a plug, an elastic reset member and a threaded sleeve; the sleeve is arranged between the annular plate and the drug guide tube, and a connecting channel is opened on the sleeve, one end of the connecting channel is used to connect with the infusion channel, and the other end of the connecting channel is used to connect with the drug administration hole; the plug is arranged at the other end port of the liquid delivery tube, and the plug is rotatably connected to the sleeve; the elastic reset member is connected between the guide head and the plug; the outer ring surface of the threaded sleeve is fixed to the inner wall of the sleeve, the circumferential outer wall of the liquid delivery tube is provided with threads, and the inner ring surface of the threaded sleeve is threadedly connected to the circumferential outer wall of the liquid delivery tube.

[0008] Preferably, as a further improvement of the present invention, the plug is a sealing cover, which includes an annular retaining ring and a closing plate, the annular retaining ring is arranged on the side of the sleeve facing the guide head, the annular retaining ring is coaxially arranged with the sleeve, and the annular retaining ring is rotatably connected to the sleeve through a connecting assembly, the closing plate is fixedly mounted inside the annular retaining ring, and the closing plate and the guide head are connected by an elastic reset member.

[0009] Preferably, as a further improvement of the present invention, a ball plug is fixed on the end surface of the closing plate facing the liquid delivery tube, and the ball plug is arranged in the tube mouth of the liquid delivery tube.

[0010] Through the above arrangement, the ball plug is used to seal the pipe opening of the liquid delivery pipe to prevent dirty liquid from flowing back into the liquid delivery pipe.

[0011] Preferably, as a further improvement of the present invention, the connecting assembly includes an annular movable plate and a first annular groove, the first annular groove is opened at the end of the sleeve opposite to the annular retaining ring, and the cross-section of the first annular groove is T-shaped, the annular movable plate is slidably connected to the inside of the first annular groove, and the annular retaining ring extends to the inside of the opening of the first annular groove and is fixed to the annular movable plate.

[0012] Through the above arrangement, by utilizing the cooperation between the annular movable plate and the first annular groove, the sleeve can be rotated relative to the annular retaining ring under the drive of the threaded sleeve.

[0013] Preferably, as a further improvement of the present invention, the connecting assembly includes a plurality of balls and a second annular groove, the second annular groove is opened at the end of the sleeve opposite to the annular retaining ring, and the cross-section of the second annular groove is T-shaped, the plurality of balls are clamped in the second annular groove, and the annular retaining ring extends to the inside of the opening of the second annular groove and is fixed to the plurality of balls.

[0014] The balls arranged as above can reduce the friction between the sleeve and the annular retaining ring, so that the sleeve can rotate more easily.

[0015] Preferably, as a further improvement of the present invention, the elastic reset member is a reset spring, the reset spring is arranged parallel to the drug guiding tube, and the two ends of the reset spring are respectively connected to the guide head and the closing plate.

[0016] Preferably, as a further improvement of the present invention, it also includes a limit assembly, which is used to limit the position of the sleeve. The limit assembly includes two limit bosses fixed on the outer wall of the liquid delivery tube, and a threaded section threadedly connected to the threaded sleeve is provided on the circumferential outer wall of the liquid delivery tube, and the two limit bosses are respectively arranged at both ends of the threaded section.

[0017] Through the above arrangement, two limiting bosses are used to limit the extreme position of the movement of the threaded sleeve, ensuring that the infusion channel and the connecting channel are connected when the threaded sleeve moves to one side, and the threaded sleeve will not be separated from the threaded section when it moves to the other side.

[0018] Preferably, as a further improvement of the present invention, the infusion channel is L-shaped, and one end of the infusion channel is arranged parallel to the liquid delivery tube, and the other end of the infusion channel is arranged perpendicular to the liquid delivery tube, one end of the connecting channel passes through the inner wall of the sleeve and is arranged perpendicular to the liquid delivery tube, and the other end of the connecting channel is used to connect with the drug delivery hole.

[0019] Preferably, as a further improvement of the present invention, there are multiple groups of drug administration holes, each group of drug administration holes is arranged along the length direction of the drug guiding tube, and the multiple groups of drug administration holes are evenly distributed around the drug guiding tube. The number of infusion channels and connecting channels is the same as the number of the multiple groups of drug administration holes, and the multiple infusion channels are evenly distributed around the annular plate, and the multiple connecting channels are evenly distributed around the sleeve. The outer wall of the sleeve is circumferentially provided with multiple strip drug delivery grooves, and the multiple strip drug delivery grooves are arranged one by one opposite to the multiple groups of drug administration holes, and each connecting channel is respectively connected to each strip drug delivery groove.

[0020] Through the above arrangement, the drug delivery speed is increased and the drug delivery efficiency is improved.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The switching component can control the on-off state of the infusion channel and the dosing hole. When inserting the dosing tube, the infusion channel and the dosing hole are disconnected to prevent bacteria and secretions from the urethra from entering the medicine. When administering the medicine, the infusion channel and the dosing hole are connected to facilitate the release of the medicine from the dosing hole. After the dosing is completed, the infusion channel and the dosing hole are disconnected to reduce the backflow of dirty liquid.

[0023] 2. The switching component can automatically and quickly control the on-off state of the infusion channel and the dosing hole through the mutual cooperation between the sleeve, the plug, the elastic reset member and the threaded sleeve. Only when injecting the medicine, the thrust generated by the injection mechanism injecting the medicine on the plug compresses the elastic reset member, so that the medicine enters the cavity formed by the annular plate, the sleeve and the plug through the delivery tube. As the medicine is continuously injected, the sleeve moves driven by the plug, and at the same time, it moves and rotates with the cooperation of the threaded sleeve, so as to align the connecting channel with the infusion channel, so that the medicine enters the connecting channel through the infusion channel and is released from the dosing hole. In other cases, the presence of the elastic reset member will disconnect the infusion channel from the connecting channel, thereby preventing it from being connected to the dosing hole. Therefore, dirt and medicine cannot enter the delivery tube and the injection barrel through the dosing hole.

[0024] 3. Since the connecting channel arranged on the sleeve rotates and moves with the sleeve, it can be quickly dislocated and aligned with the infusion channel opened on the annular plate in a spiral movement manner. Compared with the dislocation and alignment process achieved by linear movement, the probability of dirty liquid backflow can be reduced. The spiral movement dislocation can realize the simultaneous longitudinal and lateral displacement process in space, so that when the infusion channel and the connecting channel are dislocated, the overlapping area of ​​the infusion channel and the connecting channel is reduced in the longitudinal and lateral directions at the same time, while the linear movement dislocation lacks the longitudinal displacement process, and it is dislocated only in the lateral displacement process, resulting in the overlapping area of ​​the infusion channel and the connecting channel being reduced only in the lateral direction during the dislocation process. Therefore, the time required for complete dislocation of the infusion channel and the connecting channel is longer than the time required for complete dislocation of the spiral movement, which increases the probability of dirty liquid backflow. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The present invention is a schematic diagram of a front cross-sectional structure of a urethral drug delivery device for urology.

[0026] Figure 2 The present invention is a schematic structural diagram of a urethral drug delivery device for urology when the infusion channel and the drug delivery hole are not connected.

[0027] Figure 3 The present invention is a schematic diagram of the structure of a urethral drug delivery device for urology when the infusion channel is connected with the drug delivery hole.

[0028] Figure 4 The present invention is a schematic structural diagram of a connecting assembly in a urethral drug delivery device for urology surgery according to an embodiment of the present invention.

[0029] Figure 5 This is a schematic diagram of various structures arranged on the outside of a liquid delivery tube in a urethral drug delivery device for urology according to an embodiment of the present invention.

[0030] Figure 6 This is a schematic diagram of various structures arranged on a sleeve in a urethral drug delivery device for urology according to an embodiment of the present invention.

[0031] Figure 7 The present invention is a schematic diagram of the main structure of a urethral drug delivery device for urology. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1 To the attached Figure 7 , the specific implementation methods of the present invention are described in detail. In the description of the invention, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0033] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the invention, unless otherwise specified, "plurality" means two or more.

[0034] Example

[0035] like Figures 1 to 7As shown, an embodiment of the present invention provides a urethral drug delivery device for urology, including a syringe 1, a push injection mechanism, a drug guide tube 2, a liquid delivery tube 3, an annular plate 4 and a switching assembly, the push injection mechanism is connected to the syringe 1, one end of the drug guide tube 2 is fixed to the front end of the syringe 1, and a guide head 21 is fixed to the other end of the drug guide tube 2, the guide head 21 is in the shape of a hemispherical head, which is convenient for guiding the drug guide tube 2 into the urethra, a drug delivery hole 22 is provided on the side wall of the drug guide tube 2, the liquid delivery tube 3 is sleeved in the drug guide tube 2, and one end of the liquid delivery tube 3 is connected to the syringe 1, the annular plate 4 is sleeved and fixed on the outer wall of the liquid delivery tube 3 near one end of the guide head 21, and an infusion channel 41 is provided on the annular plate 4, one end of the infusion channel 41 faces the guide head 21, and the other end of the infusion channel 41 faces the drug guide The side wall of the tube 2, the switching assembly is used to connect or disconnect the infusion channel 41 and the drug administration hole 22, the switching assembly includes a sleeve 51, a plug 53, an elastic reset member 54 and a threaded sleeve 55, the sleeve 51 is sleeved between the annular plate 4 and the drug guiding tube 2, a connecting channel 52 is opened on the sleeve 51, one end of the connecting channel 52 is used to communicate with the infusion channel 41, and the other end of the connecting channel 52 is used to communicate with the drug administration hole 22, the plug 53 is arranged at the other end port of the liquid delivery tube 3, the plug 53 is rotatably connected to the sleeve 51, and the elastic reset member 54 is connected between the guide head 21 and the plug 53; the outer ring surface of the threaded sleeve 55 is fixed to the inner wall of the sleeve 51, the circumferential outer wall of the liquid delivery tube 3 is provided with threads, and the inner ring surface of the threaded sleeve 55 is threadedly connected to the circumferential outer wall of the liquid delivery tube 3.

[0036] In this embodiment, when administering medicine to the patient's urethra, the drug solution is poured into the syringe 1, and then the drug guide tube 2 is inserted into the patient's urethra, and the drug guide tube 2 easily enters the patient's urethra under the guidance of the guide head 21. Figure 2 As shown, at this time, since the drug is not injected through the push mechanism, refer to Figure 1, under the elastic force of the elastic reset member 54, the plug 53 closes the pipe opening of the liquid delivery tube 3, and the threaded sleeve 55 is located at the initial end. At this time, the connecting channel 52 opened on the sleeve 51 is staggered with the infusion channel 41 opened on the annular plate 4, and the infusion channel 41 is disconnected from the drug delivery hole 22. Therefore, dirt in the patient's urethra cannot enter the infusion channel 41 through the drug delivery hole 22, thereby avoiding contamination of the liquid delivery tube 3 and the liquid in the syringe 1. When it moves to the desired drug delivery position, the drug is injected through the push injection mechanism, and the liquid in the syringe 1 is continuously injected into the liquid delivery tube 3 by pressure. When the thrust of the liquid is greater than the elastic force of the elastic reset member 54, the plug 53 will move in the direction of the guide head 21 and open the pipe opening of the liquid delivery tube 3. Since the plug 53 is rotatably connected to the sleeve 51, the plug 53 is moved during It will drive the sleeve 51 to move in the direction of the guide head 21. At the same time, since the sleeve 51 is threadedly connected to the outer wall of the liquid delivery tube 3 through the threaded sleeve 55, the sleeve 51 will rotate itself during the horizontal movement. At this time, the medicine enters the cavity formed by the annular plate 4, the sleeve 51 and the plug 53. With the continuous injection of the medicine, the sleeve 51 moves and rotates driven by the plug 53, which will make the connecting channel 52 connected with the infusion channel 41, so that the medicine passes through the infusion channel 41 and the connecting channel 52 and is discharged through the drug delivery hole 22. When the drug delivery is completed, the injection mechanism no longer squeezes the medicine to apply thrust to the plug 53. Under the elastic force of the elastic reset member 54, the plug 53 will be driven to move in the opposite direction, thereby driving the sleeve 51 to move and rotate in the opposite direction, cutting off the connecting channel 52 from the infusion channel 41, and preventing sewage from entering the liquid delivery tube 3.

[0037] Further, such as Figure 2 As shown, the plug 53 is a blocking cover, which includes an annular retaining ring 531 and a closing plate 532. The annular retaining ring 531 is arranged on the side of the sleeve 51 facing the guide head 21. The annular retaining ring 531 is coaxially arranged with the sleeve 51, and the annular retaining ring 531 is rotatably connected to the sleeve 51 through a connecting assembly. The closing plate 532 is fixed inside the annular retaining ring 531, and the closing plate 532 is connected to the guide head 21 through an elastic reset member 54. The blocking cover can block the port of the liquid delivery tube 3 and the outer side thereof, so that the liquid medicine output from the liquid delivery tube 3 can only be delivered from the infusion channel 41, and as the liquid medicine is continuously poured in, the liquid medicine will be temporarily stored in the cavity formed by the annular plate 4, the sleeve 51, the annular retaining ring 531 and the closing plate 532.

[0038] Further, such as Figure 3 As shown, in order to seal the mouth of the liquid delivery pipe 3 and effectively prevent the dirty liquid from flowing back into the liquid delivery pipe 3, a ball plug 5321 is fixed on the end face of the closing plate 532 facing the liquid delivery pipe 3, and the ball plug 5321 is arranged in the mouth of the liquid delivery pipe 3.

[0039] Specifically, Figure 3 As shown, as an optional implementation of the connecting component, the connecting component in this embodiment includes an annular movable plate 61 and a first annular groove 62. The first annular groove 62 is opened at the end of the sleeve 51 facing the annular retaining ring 531, and the cross-section of the first annular groove 62 is T-shaped. The annular movable plate 61 is slidably connected to the inside of the first annular groove 62, and the annular retaining ring 531 extends to the inside of the opening of the first annular groove 62 and is fixed to the annular movable plate 61. When the plug 53 moves, the annular retaining ring 531 drives the annular movable plate 61 to move synchronously, and the annular movable plate 61 drives the first annular groove 62 to move and then drives the sleeve 51 to move. The cooperation between the annular movable plate 61 and the first annular groove 62 enables the sleeve 51 to rotate relative to the annular retaining ring 531 under the drive of the threaded sleeve 55.

[0040] Specifically, Figure 4 As shown, as an optional implementation of the connecting component, the connecting component in this embodiment includes a plurality of balls 63 and a second annular groove 64, the second annular groove 64 is opened at the end of the sleeve 51 facing the annular retaining ring 531, and the cross-section of the second annular groove 64 is T-shaped, a plurality of balls 63 are clamped in the second annular groove 64, the annular retaining ring 531 extends to the opening of the second annular groove 64 and is fixed to the plurality of balls 63, the set balls 63 replace the annular movable plate 61 to drive the first annular groove 62 to move and then drive the sleeve 51 to move, the setting of the balls 63 can reduce the friction between the sleeve 51 and the second annular retaining ring 531 during the rotation of the sleeve 51 relative to the annular retaining ring 531, so that the sleeve 51 can rotate more easily.

[0041] Further, such as Figure 2 As shown, the elastic reset member 54 is a reset spring, which is arranged parallel to the drug guiding tube 2, and the two ends of the reset spring are respectively connected to the guiding head 21 and the closing plate 532.

[0042] Further, such as Figure 2 , Figure 3 and Figure 5 As shown, in order to be able to locate the position of the rotational movement of the limiting sleeve 51, a limiting assembly is also included. The limiting assembly is used to limit the position of the sleeve 51. The limiting assembly includes two limiting bosses 7 fixed on the outer wall of the liquid delivery pipe 3. A threaded section threadedly connected to the threaded sleeve 55 is provided on the circumferential outer wall of the liquid delivery pipe 3. The two limiting bosses 7 are respectively arranged at both ends of the threaded section. Figure 3 The limiting boss 7 arranged on the left side can limit the left limit movement position of the threaded sleeve 55, so that after it moves and contacts with the limiting boss 7 on the left side, it ensures that the infusion channel 41 and the connecting channel 52 are connected, forming a positioning function, referring to Figure 4 The limiting boss 7 arranged on the right side can limit the right side limit movement position of the threaded sleeve 55, thereby preventing the threaded sleeve 55 from being separated from the threaded section of the threaded sleeve 55.

[0043] Furthermore, the infusion channel 41 is L-shaped, and one end of the infusion channel 41 is arranged parallel to the liquid delivery tube 3, and the other end of the infusion channel 41 is arranged perpendicular to the liquid delivery tube 3. One end of the connecting channel 52 passes through the inner wall of the sleeve 51 and is arranged perpendicular to the liquid delivery tube 3. The other end of the connecting channel 52 is used to connect with the dosing hole 22.

[0044] Further, such as Figures 5 to 7 As shown, in order to improve the drug administration efficiency, multiple groups of drug administration holes 22 are provided, and each group of drug administration holes 22 is arranged along the length direction of the drug guiding tube 2. The multiple groups of drug administration holes 22 are evenly distributed around the drug guiding tube 2, and the number of infusion channels 41 and connecting channels 52 is the same as the number of the multiple groups of drug administration holes 22, and the multiple infusion channels 41 are evenly distributed around the annular plate 4, and the multiple connecting channels 52 are evenly distributed around the sleeve 51. The outer wall of the sleeve 51 is circumferentially provided with multiple strip drug delivery grooves 521, and the multiple strip drug delivery grooves 521 are arranged one by one opposite to the multiple groups of drug administration holes 22, and each connecting channel 52 is respectively connected to each strip drug delivery groove 521. Through the above arrangement, the number of infusion channels 41, connecting channels 52, and drug administration holes 22 is increased, and the connecting channel 52 is connected to a group of drug administration holes 22 through the strip drug delivery groove 521, so that more liquid medicine can be discharged synchronously during drug administration, which greatly increases the drug administration speed.

[0045] Further, such as Figure 1 and Figure 2 As shown, in order to be able to extract the dirt at the urethral opening and the dirt in the strip medicine delivery groove 521, a dirt suction component is also included, and the dirt suction component includes an annular dirt suction groove 81, a dirt suction pipe 82 and a joint 83. The annular dirt suction groove 81 is opened on the inner wall of the medicine guide tube 2 and is located on the rear side of the dosing hole 22. One side of the annular dirt suction groove 81 is connected to multiple strip medicine delivery grooves 521. The dirt suction pipe 82 is arranged at the connection between the injection barrel 1 and the medicine guide tube 2. One end of the dirt suction pipe 82 is connected to the interior of the medicine guide tube 2. The joint 83 is arranged at the other end of the dirt suction pipe 82. The joint 83 is used to connect to an external dirt suction pump.

[0046] In this embodiment, when suction is performed through the sewage suction assembly, the connector 83 is connected to the external sewage suction pump. Figure 2In the case where no injection pressure is generated, that is, when the elastic reset member 54 causes the plug 53 to block the liquid delivery tube 3, the infusion channel 41 is disconnected from the connecting channel 52, and one side of the annular suction groove 81 is connected to the plurality of strip-shaped medicine delivery grooves 521. At this time, the waste can only enter the strip-shaped medicine delivery grooves 521 through the drug delivery hole 22. Therefore, by turning on the suction pump, a negative pressure is formed in the cavity between the liquid delivery tube 3 and the medicine guide tube 2, and the waste is sucked out by the negative pressure. Figure 3 When administering an injection, the strip medicine delivery groove 521 moves with the sleeve 51 and is no longer connected to the annular sewage suction groove 81. At this time, the released medicine liquid will not flow back into the annular sewage suction groove 81 through the strip medicine delivery groove 521, ensuring that the medicine liquid can be continuously sprayed out.

[0047] Specifically, in another embodiment of the present invention, Figure 1 As shown, the injection mechanism includes a piston rod 91, a piston 92 and a push-pull rod 93. One end of the piston rod 91 is inserted into the injection barrel 1 and connected to the piston 92, and the other end of the piston rod 91 is connected to the push-pull rod 93 after passing through the injection barrel 1.

[0048] In this embodiment, when the drug is injected by the push-injection mechanism, the piston rod 91 and the piston 92 are driven to move toward the guide head 21 by pushing the push-pull rod 93, so that the drug solution in the syringe 1 is squeezed and output through the liquid delivery tube 3.

[0049] Among them, Figure 7 As shown, in order to facilitate pushing and squeezing the push-pull rod 93, a flange 11 is provided on the outer wall of both sides of the port of the syringe 1 close to the push-pull rod 93, and the flange 11 provides positioning for the index finger and middle finger of the medical staff, and the push-pull rod 93 is moved by the thumb.

[0050] In order to facilitate the replenishment of medicine into the syringe 1, a connecting tube 12 is provided on the syringe 1, and a protective cap 13 is threadedly connected to the connecting tube 12. When replenishing the medicine, the protective cap 13 is unscrewed and the medicine is poured into the syringe 1 through the connecting tube 12.

[0051] In summary, the present invention discloses a urethral drug delivery device for urology. The on-off state of an infusion channel and a drug delivery hole can be controlled by a switching component. When a drug delivery tube is inserted, the infusion channel and the drug delivery hole are disconnected to prevent bacteria in the urethral opening from entering the drug solution. When delivering the drug, the infusion channel and the drug delivery hole are connected to facilitate the release of the drug solution from the drug delivery hole. After the drug delivery is completed, the infusion channel and the drug delivery hole are disconnected to prevent the drug solution from being mixed with dirt and flowing back. The switching component can automatically control the on-off state of the infusion channel and the drug delivery hole through the mutual cooperation among the sleeve, the plug, the elastic reset member and the threaded sleeve. Only when injecting the drug, the thrust generated by the injection mechanism injecting the drug solution on the plug compresses the elastic reset member, so that the drug solution enters the annular plate, the sleeve and the tube through the liquid delivery tube. In the cavity formed between the plug and the plug, as the medicine is continuously injected, the sleeve moves driven by the plug, and at the same time moves and rotates with the cooperation of the threaded sleeve, so as to align the connecting channel with the infusion channel, so that the medicine enters the connecting channel through the infusion channel and is released from the medication hole. In other cases, the presence of the elastic reset part will disconnect the infusion channel from the connecting channel, thereby preventing it from being connected to the medication hole. Therefore, dirt and medicine cannot enter the delivery tube and the injection barrel through the medication hole. Since the connecting channel arranged on the sleeve rotates and moves with the sleeve, it can be quickly dislocated with the infusion channel opened on the annular plate, immediately cutting off the connection process between the infusion channel and the connecting channel, and avoiding the backflow of medicine and dirt.

[0052] The above disclosures are only several preferred specific embodiments of the present invention. However, the embodiments of the present invention are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A urethral drug delivery device for urology, comprising a syringe (1) and a push injection mechanism connected to the syringe (1), characterized in that: Also includes: A drug guiding tube (2), one end of which is fixed to the front end of the injection barrel (1), and the other end of which is fixed with a guide head (21), and a drug administration hole (22) is provided on the side wall of the drug guiding tube (2); A liquid delivery tube (3) is sleeved inside the drug guiding tube (2), and one end of the tube is connected to the injection barrel (1). an annular plate (4) which is sleeved and fixed on the outer wall of the liquid delivery tube (3) at one end close to the guide head (21); an infusion channel (41) is provided on the annular plate (4); one end of the infusion channel (41) faces the guide head (21), and the other end of the infusion channel (41) faces the side wall of the drug guide tube (2); A switching assembly is used to connect or disconnect an infusion channel (41) and a drug delivery hole (22), the switching assembly comprising: a sleeve (51) sleeved between an annular plate (4) and a drug delivery tube (2), a connecting channel (52) being provided on the sleeve (51), one end of the connecting channel (52) being used to communicate with the infusion channel (41), and the other end of the connecting channel (52) being used to communicate with the drug delivery hole (22); a plug (53) being provided at the other end of the delivery tube (3), the plug (53) being rotatably connected to the sleeve (51); an elastic reset member (54) being connected between the guide head (21) and the plug (53); and a threaded sleeve (55), the outer ring surface of which is fixed to the inner wall of the sleeve (51), the circumferential outer wall of the delivery tube (3) being provided with threads, the inner ring surface of the threaded sleeve (55) being threadably connected to the circumferential outer wall of the delivery tube (3).

2. The urethral medication device for urology according to claim 1, characterized in that: The plug (53) is a sealing cover, and the sealing cover comprises an annular retaining ring (531) and a closing plate (532). The annular retaining ring (531) is arranged on a side of the sleeve (51) facing the guide head (21), the annular retaining ring (531) is coaxially arranged with the sleeve (51), and the annular retaining ring (531) is rotatably connected to the sleeve (51) via a connecting assembly. The closing plate (532) is fixedly mounted inside the annular retaining ring (531), and the closing plate (532) is connected to the guide head (21) via an elastic reset member (54).

3. The urethral medication device for urology according to claim 2, characterized in that: A ball plug (5321) is fixed on the end surface of the closing plate (532) facing the liquid delivery pipe (3), and the ball plug (5321) is arranged in the pipe opening of the liquid delivery pipe (3).

4. The urethral medication device for urology according to claim 2, characterized in that: The connecting assembly comprises an annular movable plate (61) and a first annular groove (62); the first annular groove (62) is opened at the end of the sleeve (51) facing the annular retaining ring (531), and the cross section of the first annular groove (62) is T-shaped; the annular movable plate (61) is slidably connected inside the first annular groove (62), and the annular retaining ring (531) extends to the inside of the opening of the first annular groove (62) and is fixed to the annular movable plate (61).

5. The urethral medication device for urology according to claim 2, characterized in that: The connecting assembly comprises a plurality of balls (63) and a second annular groove (64); the second annular groove (64) is provided at the end of the sleeve (51) facing the annular retaining ring (531), and the cross section of the second annular groove (64) is T-shaped; the plurality of balls (63) are clamped in the second annular groove (64), and the annular retaining ring (531) extends to the inside of the opening of the second annular groove (64) and is fixed to the plurality of balls (63).

6. The urethral medication device for urology according to claim 2, characterized in that: The elastic reset member (54) is a reset spring, which is arranged in parallel with the drug guiding tube (2), and the two ends of the reset spring are respectively connected to the guide head (21) and the closing plate (532).

7. The urethral medication device for urology according to any one of claims 1 to 6, characterized in that: The invention also comprises a limit assembly, which is used to limit the position of the sleeve (51), and comprises two limit bosses (7) fixed on the outer wall of the liquid delivery pipe (3), and a threaded section threadedly connected to the threaded sleeve (55) is provided on the circumferential outer wall of the liquid delivery pipe (3), and the two limit bosses (7) are respectively arranged at the two ends of the threaded section.

8. The urethral medication device for urology according to claim 7, characterized in that: The infusion channel (41) is L-shaped, and one end of the infusion channel (41) is arranged parallel to the liquid delivery tube (3), and the other end of the infusion channel (41) is arranged perpendicular to the liquid delivery tube (3). One end of the communication channel (52) passes through the inner wall of the sleeve (51) and is arranged perpendicular to the liquid delivery tube (3), and the other end of the communication channel (52) is used to communicate with the drug delivery hole (22).

9. The urethral medication device for urology according to claim 8, characterized in that: There are multiple groups of drug administration holes (22), each group of drug administration holes (22) is arranged along the length direction of the drug guiding tube (2), and the multiple groups of drug administration holes (22) are evenly distributed around the drug guiding tube (2). The number of the infusion channels (41) and the connecting channels (52) is the same as the number of the multiple groups of drug administration holes (22), and the multiple infusion channels (41) are evenly distributed around the annular plate (4), and the multiple connecting channels (52) are evenly distributed around the sleeve (51). The outer wall of the sleeve (51) is circumferentially provided with multiple strip drug delivery grooves (521), and the multiple strip drug delivery grooves (521) are arranged one by one opposite to the multiple groups of drug administration holes (22), and each connecting channel (52) is respectively connected to each strip drug delivery groove (521).

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