Dilator for children urinary surgery

Abstract

The utility model relates to the technical field of medical instruments, in particular to a dilator for children urinary surgery, which comprises a fixing cylinder, one end of the fixing cylinder is fixedly connected with a guide block, the outer wall of the fixing cylinder is provided with a first storage groove and a second storage groove, and the inner wall of the second storage groove is attached with a first dilating plate. First moving holes are formed in the two ends of the first expansion plate, a second expansion plate is slidably connected into the first moving holes, a third expansion plate is fixedly connected to one end of the second expansion plate, a plurality of push columns are rotatably connected to one end of the third expansion plate, and sleeves are rotatably connected to the ends, penetrating into the inner cavity of the fixing cylinder, of the push columns. Compared with the prior art, the first dilation plate, the second dilation plate and the third dilation plate form an approximately cylindrical object, so that the first dilation plate, the second dilation plate and the third dilation plate have uniform internal expansion force on the urethra, and the dilation effect on the urethra is good.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a dilator for pediatric urology surgery. Background Art

[0002] Urethral stenosis is a common disease in urology. The causes of the disease are usually divided into three categories: traumatic factors, inflammatory factors, and congenital factors. The lesions are mainly manifested as fatigue scars of different depths and densities, accompanied by defects in the urothelium and contracture of the tube wall, which ultimately affects normal urination. The simplest and most commonly used method for treating urethral stenosis is urethral dilation, often using a metal urethral probe to dilate the stricture urethra.

[0003] In the prior art, a Chinese patent with publication number CN208959104U proposes a dilator for urological surgery in children, which realizes urinary tract expansion by telescoping a spiral channel inner tube and an elastic sheet, reduces the previous air pressure passage on the inner tube wall of the channel, reduces the diameter of the dilator tube, and reduces the difficulty of passing the urinary tract. The elastic expansion connection part and the elastic channel inner tube can facilitate the expansion tube to meet the operation requirements of different curvatures. However, in actual application, there is still a problem that the shape of the dilator is difficult to control after entering the urethra for expansion due to the inconsistent inner diameter of the urethra itself, resulting in uneven expansion force of the dilator on the urethra as a whole, resulting in reduced expansion effect. Therefore, we disclose a dilator for urological surgery in children. Utility Model Content

[0004] In view of this, the purpose of the utility model is to provide a dilator for pediatric urological surgery to solve the problem that the dilator as a whole exerts uneven dilating force on the urethra, resulting in reduced dilating effect.

[0005] Based on the above purpose, the utility model provides a dilator for pediatric urological surgery, including a fixed tube, one end of the fixed tube is fixedly connected to a guide block, the outer wall of the fixed tube is provided with a first receiving groove and a second receiving groove, the inner wall of the second receiving groove is fitted with a first expansion plate, both ends of the first expansion plate are provided with a first moving hole, the second expansion plate is slidably connected in the first moving hole, one end of the second expansion plate is fixedly connected to a third expansion plate, one end of the third expansion plate is rotatably connected to a plurality of push columns, the push columns pass through one end of the inner cavity of the fixed tube and are rotatably connected to a sleeve, the outer wall of the sleeve is fixedly connected to a gear, one end of the gear is meshed with a rack, one end of the rack is fixedly connected to a pull rod, and the pull rod passes through the outside of the fixed tube.

[0006] Preferably, one end of the fixed cylinder is fixedly connected to a fixed block, a second movable hole is opened in the middle of the fixed block, a ball is rotatably connected to the bottom end of the second movable hole, the pull rod is slidably connected in the second movable hole, and the ball fits the pull rod.

[0007] Preferably, the outer wall of the pull rod is provided with a scale groove.

[0008] Preferably, one end of the pull rod located outside the fixing tube is fixedly connected with an arc rod.

[0009] Preferably, both ends of the second expansion plate are fixedly connected to limit blocks.

[0010] Preferably, an anti-slip edge is fixedly connected to the outer wall of one end of the fixing cylinder.

[0011] Preferably, the guide block is conical, and the diameter of the bottom surface of the guide block is the same as the diameter of the fixed cylinder.

[0012] Preferably, both ends of the sleeve are engaged with the push column, the third expansion plate is symmetrically distributed around the longitudinal center axis of the fixed cylinder, the first expansion plate is symmetrically distributed around the transverse center axis of the fixed cylinder, and both ends of the third expansion plate are fixedly connected to the second expansion plate.

[0013] Preferably, the second expansion plate is located in the second receiving groove, and the third expansion plate and the first expansion plate are both located in the first receiving groove.

[0014] Preferably, one end of the push pin is provided with a thread, and the end of the push pin provided with the thread is engaged with the sleeve.

[0015] The beneficial effects of the utility model are as follows: the rack is driven to move by pulling the pull rod, so that the rack drives the gear to rotate, and the gear rotates and drives the sleeve to rotate, so that the sleeve drives the third expansion plate to move through the push column, and the third expansion plate moves and drives the second expansion plate to move, so that the second expansion plate moves in the first moving hole and drives the first expansion plate to move, so that the first expansion plate, the second expansion plate and the third expansion plate move in the direction away from the fixed tube at the same time, so that the first expansion plate, the second expansion plate and the third expansion plate form an object that is approximately cylindrical, so that the expansion force of the first expansion plate, the second expansion plate and the third expansion plate in the urethra is more uniform, and the expansion effect on the urethra is better;

[0016] The ball reduces the resistance of the pull rod when it moves, making it easy to pull the pull rod, which is convenient for staff to operate. The staff can judge the size of the urethral expansion according to the pulling distance of the pull rod, and more accurately grasp the size of the urethral expansion, which is convenient for use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of an embodiment of the utility model;

[0019] Figure 2 It is a partially cutaway three-dimensional structural schematic diagram of the fixing block of the utility model;

[0020] Figure 3 It is a structural schematic diagram of the pull rod of the utility model;

[0021] Figure 4 It is a schematic diagram of the connection structure of the fixed cylinder, the first expansion plate, the second expansion plate and the third expansion plate of the utility model;

[0022] Figure 5 It is a partially cutaway three-dimensional structural schematic diagram of the first expansion plate of the utility model.

[0023] The markings in the figure are:

[0024] 1. Fixed cylinder; 2. Guide block; 3. First receiving groove; 4. First expansion plate; 5. First moving hole; 6. Second expansion plate; 7. Third expansion plate; 8. Push column; 9. Sleeve; 10. Gear; 11. Rack; 12. Limit block; 13. Second receiving groove; 14. Pull rod; 15. Fixed block; 16. Second moving hole; 17. Ball. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0026] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0027] like Figure 1-Figure 5As shown, a dilator for urological surgery in children comprises a fixed tube 1, one end of the fixed tube 1 is fixedly connected to a guide block 2, the outer wall of the fixed tube 1 is provided with a first receiving groove 3 and a second receiving groove 13, the inner wall of the second receiving groove 13 is fitted with a first expansion plate 4, both ends of the first expansion plate 4 are provided with a first moving hole 5, a second expansion plate 6 is slidably connected in the first moving hole 5, one end of the second expansion plate 6 is fixedly connected to a third expansion plate 7, one end of the third expansion plate 7 is rotatably connected to a plurality of push posts 8, one end of the push posts 8 that penetrates through the inner cavity of the fixed tube 1 is rotatably connected to a sleeve 9, the outer wall of the sleeve 9 is fixedly connected to a gear 10, one end of the gear 10 is meshed with a rack 11, and one end of the rack 11 is meshed with a gear 10. The end is fixedly connected with a pull rod 14, and the pull rod 14 passes through the outside of the fixed cylinder 1. The second expansion plate 6 is located in the second receiving groove 13. The third expansion plate 7 and the first expansion plate 4 are both located in the first receiving groove 3. When in use, a guide block 2 is fixedly connected through one end of the fixed cylinder 1, so that the fixed cylinder 1 can drive the guide block 2 to move. A rack 11 is meshed with one end of the gear 10, and one end of the rack 11 is fixedly connected with a pull rod 14. The pull rod 14 passes through the outside of the fixed cylinder 1, so that the staff can pull the pull rod 14 to drive the rack 11 to move, so that the rack 11 drives the gear 10 to rotate. A plurality of push columns 8 are rotatably connected through one end of the third expansion plate 7, and the push columns 8 pass through one end of the inner cavity of the fixed cylinder 1 The sleeve 9 is rotatably connected, and the outer wall of the sleeve 9 is fixedly connected with a gear 10, so that when the gear 10 rotates, the sleeve 9 is driven to rotate, so that the sleeve 9 drives the third expansion plate 7 to move through the push column 8, and first moving holes 5 are opened at both ends of the first expansion plate 4, and the second expansion plate 6 is slidably connected in the first moving hole 5. One end of the second expansion plate 6 is fixedly connected with the third expansion plate 7, so that when the third expansion plate 7 moves, the second expansion plate 6 is driven to move, so that the second expansion plate 6 moves in the first moving hole 5 and drives the first expansion plate 4 to move, so that the first expansion plate 4, the second expansion plate 6 and the third expansion plate 7 move away from the fixed cylinder 1 at the same time, so that the first expansion plate 4, the second expansion plate 6 and the third expansion plate 7 move in the direction ... The expansion plate 6 and the third expansion plate 7 form an approximately cylindrical object, so that the first expansion plate 4, the second expansion plate 6 and the third expansion plate 7 have a relatively uniform expansion force on the urethra, and the expansion effect on the urethra is better. The first receiving groove 3 and the second receiving groove 13 are opened on the outer wall of the fixed tube 1, and the inner wall of the second receiving groove 13 is fitted with the first expansion plate 4, the second expansion plate 6 is located in the second receiving groove 13, and the third expansion plate 7 and the first expansion plate 4 are both located in the first receiving groove 3, so that when the fixed tube 1 pushes the guide block 2 to enter the urethra, the first expansion plate 4, the second expansion plate 6 and the third expansion plate 7 do not affect the fixed tube 1 from entering the urethra, so that the fixed tube 1 is easy to enter the urethra, thereby making the dilator easy to operate.

[0028] As a preferred implementation in this embodiment, Figure 2 and Figure 3As shown, one end of the fixed cylinder 1 is fixedly connected to a fixed block 15, a second moving hole 16 is opened in the middle of the fixed block 15, a ball 17 is rotatably connected to the bottom end of the second moving hole 16, the pull rod 14 is slidably connected in the second moving hole 16, the ball 17 fits with the pull rod 14, a scale groove is opened on the outer wall of the pull rod 14, an end of the pull rod 14 located outside the fixed cylinder 1 is fixedly connected to an arc rod, and the fixed block 15 is fixedly connected to one end of the fixed cylinder 1, so that the fixed cylinder 1 limits the position of the fixed block 15, and a second moving hole 16 is opened in the middle of the fixed block 15, and the pull rod 14 is slidably connected to the second moving hole 16, so that the fixed block 15 limits the moving position of the pull rod 14, and the ball 17 is rotatably connected to the bottom end of the second moving hole 16. The ball 17 fits with the pull rod 14, so that the ball 17 reduces the resistance of the pull rod 14 when it moves, making it easy to pull the pull rod 14 and convenient for the staff to operate. A scale groove is opened on the outer wall of the pull rod 14, so that the staff can judge the size of the urethral expansion according to the pulling distance of the pull rod 14, and the size of the urethral expansion can be grasped more accurately, which is convenient for use. The pull rod 14 is fixedly connected with an arc rod at one end outside the fixed tube 1, so that the pull rod 14 is easy to pull and easy to use.

[0029] As a preferred implementation in this embodiment, Figure 2 , Figure 4 and Figure 5As shown, both ends of the second expansion plate 6 are fixedly connected to the limiting blocks 12, the outer wall of one end of the fixed cylinder 1 is fixedly connected with an anti-slip edge, the guide block 2 is conical, the bottom diameter of the guide block 2 is the same as the diameter of the fixed cylinder 1, both ends of the sleeve 9 are engaged with the push column 8, the third expansion plate 7 is symmetrically distributed with the longitudinal center axis of the fixed cylinder 1 as the center, the first expansion plate 4 is symmetrically distributed with the transverse center axis of the fixed cylinder 1 as the center, both ends of the third expansion plate 7 are fixedly connected to the second expansion plate 6, one end of the push column 8 is provided with a thread, and the end of the push column 8 with a thread is engaged with the sleeve 9, and the two ends of the second expansion plate 6 are fixedly connected to the limiting blocks 12, so that the limiting blocks 12 can limit the relative distance between the second expansion plate 6 and the first expansion plate 4 after movement, so as to avoid the connection between the first expansion plate 4 and the second expansion plate 6 being completely disconnected. Open, the outer wall of one end of the fixed tube 1 is fixedly connected with an anti-slip edge, so that the fixed tube 1 is easy to use, the guide block 2 is conical, and the bottom diameter of the guide block 2 is the same as the diameter of the fixed tube 1, so that the guide block 2 and the fixed tube 1 are easy to enter the urethra, and both ends of the sleeve 9 are engaged with the push column 8, the third expansion plate 7 is symmetrically distributed with the longitudinal center axis of the fixed tube 1 as the center, and the first expansion plate 4 is symmetrically distributed with the transverse center axis of the fixed tube 1 as the center, and both ends of the third expansion plate 7 are fixedly connected with the second expansion plate 6, so that when the sleeve 9 rotates, the push columns 8 at both ends move at the same time, so that the third expansion plate 7, the second expansion plate 6 and the first expansion plate 4 move at the same time, and a thread is provided at one end of the push column 8, and the end of the push column 8 with a thread is engaged with the sleeve 9, so that the sleeve 9 can drive the push column 8 to rotate.

[0030] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0031] The utility model is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the scope of protection of the utility model.

Claims

1. A dilator for pediatric urology surgery, comprising a fixing tube (1), characterized in that: One end of the fixed cylinder (1) is fixedly connected to a guide block (2); the outer wall of the fixed cylinder (1) is provided with a first receiving groove (3) and a second receiving groove (13); the inner wall of the second receiving groove (13) is fitted with a first expansion plate (4); both ends of the first expansion plate (4) are provided with a first moving hole (5); a second expansion plate (6) is slidably connected in the first moving hole (5); one end of the second expansion plate (6) is fixedly connected to a third expansion plate (7); one end of the third expansion plate (7) is rotatably connected to a plurality of push columns (8); one end of the push columns (8) passes through the inner cavity of the fixed cylinder (1) and is rotatably connected to a sleeve (9); a gear (10) is fixedly connected to the outer wall of the sleeve (9); one end of the gear (10) is meshed with a rack (11); one end of the rack (11) is fixedly connected to a pull rod (14); the pull rod (14) passes through the outside of the fixed cylinder (1).

2. The dilator for pediatric urology surgery according to claim 1, characterized in that: One end of the fixed cylinder (1) is fixedly connected to a fixed block (15), a second movable hole (16) is opened in the middle of the fixed block (15), a ball (17) is rotatably connected to the bottom end of the second movable hole (16), the pull rod (14) is slidably connected in the second movable hole (16), and the ball (17) is in close contact with the pull rod (14).

3. The dilator for pediatric urology surgery according to claim 2, characterized in that: The outer wall of the pull rod (14) is provided with a scale groove.

4. The dilator for pediatric urology surgery according to claim 2, characterized in that: One end of the pull rod (14) located outside the fixing tube (1) is fixedly connected to an arc-shaped rod.

5. The dilator for pediatric urology surgery according to claim 1, characterized in that: Both ends of the second expansion plate (6) are fixedly connected to limit blocks (12).

6. The dilator for pediatric urology surgery according to claim 1, characterized in that: An anti-slip edge is fixedly connected to the outer wall of one end of the fixing cylinder (1).

7. The dilator for pediatric urology surgery according to claim 1, characterized in that: The guide block (2) is conical, and the diameter of the bottom surface of the guide block (2) is the same as the diameter of the fixed cylinder (1).

8. The dilator for pediatric urology surgery according to claim 1, characterized in that: Both ends of the sleeve (9) are engaged with the push column (8), the third expansion plate (7) is symmetrically distributed around the longitudinal center axis of the fixed cylinder (1), the first expansion plate (4) is symmetrically distributed around the transverse center axis of the fixed cylinder (1), and both ends of the third expansion plate (7) are fixedly connected to the second expansion plate (6).

9. The dilator for pediatric urology surgery according to claim 1, characterized in that: The second expansion plate (6) is located in the second receiving groove (13), and the third expansion plate (7) and the first expansion plate (4) are both located in the first receiving groove (3).

10. The dilator for pediatric urology surgery according to claim 1, characterized in that: One end of the push pin (8) is provided with a thread, and the end of the push pin (8) provided with the thread is meshed with the sleeve (9).

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