Telescopic puncture needle
By designing an automatic telescopic puncture needle, the risk of misprick injury and mispricking during the use of puncture needles during percutaneous endoscopic gastrostomy is solved, and a safer and lower risk surgical process is achieved.
Patent Information
- Application Number
- CN202420608005.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-27
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-03-27
AI Technical Summary
In percutaneous endoscopic gastrostomy, there are two main risks of using puncture needles: one is that medical staff may be injured by puncture needles due to improper operation, and the other is that there is a risk of mispriming the posterior wall of the gastric wall, resulting in increased pain and complications in the patient.
A telescopic puncture needle is designed, which has the functions of automatic extension and retraction. The puncture needle consists of a body box, an auxiliary body box, a release button, a needle cover and a puncture needle. By releasing the button, the needle cover and puncture needle can automatically extend and retract, avoiding unnecessary contact and mispriming.
The telescopic puncture needle effectively reduces the risk of missed stab wounds in medical staff and the possibility of missed puncture on the posterior wall of the stomach, improves the safety and efficiency of the surgery, and reduces the pain of the patients.
Smart Images
Figure CN222899235U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of medical devices, and particularly relates to a telescopic puncture needle, which is a novel telescopic puncture needle capable of automatically extending and retracting during a gastrostomy operation. Background Art
[0002] Percutaneous endoscopic gastrostomy (abbreviated as PEG) refers to a method of placing a gastrostomy tube in the stomach through a puncture hole in the abdominal wall under an endoscope, providing a nutritional support channel for patients who cannot eat orally but still have normal gastrointestinal function. Currently, one type of PEG is the direct catheterization method for gastric wall fixation (also known as the Introducer method), which sutures the abdominal wall and the gastric wall through gastric wall fixation and uses a puncture needle to directly puncture and place the gastrostomy tube through a holding sleeve. In actual clinical practice, there are two risks when using a puncture needle. One risk is that medical staff may be accidentally stabbed by the tip of the puncture needle during the operation, and the other is the risk of accidentally puncturing the posterior wall of the stomach during gastric puncture. Content of the Utility Model
[0003] The purpose of the utility model is to provide a telescopic puncture needle, which can automatically extend and retract during use, providing a lower-risk and safer puncture needle for percutaneous endoscopic gastrostomy.
[0004] The adopted technical solution is as follows:
[0005] A telescopic puncture needle includes a main body box, an auxiliary main body box, a release button, a needle sleeve, and a puncture needle.
[0006] The release button is arranged inside the main body box.
[0007] The release button is square, and button protrusions are respectively fixed on the outer sides of the two vertical sides. The button protrusions are arranged in the front-back direction inside the main body box.
[0008] There is a vertical spring below the release button, and the two ends of the vertical spring respectively abut against the release button and the lower surface of the main body box.
[0009] An upper card group and a lower card group are fixed inside the main body box.
[0010] The upper card group includes two vertically arranged upper cards arranged in the front-back direction.
[0011] The lower card group includes two vertically arranged lower cards arranged in the front-back direction.
[0012] The gap between the upper card and the lower card is a card slot for clamping the button protrusion when not puncturing.
[0013] The right ends of the upper card and the lower card are both fixed inside the right side wall of the main body box.
[0014] A positioning tube is fixed inside the right side wall of the main body box.
[0015] There is a fixing plate on the right side of the puncture needle.
[0016] A sleeve is sleeved on the puncture needle, and the sleeve and the puncture needle are clearance-matched.
[0017] A transverse spring is arranged outside the sleeve, and two ends of the transverse spring are respectively pressed against the fixing plate and the inner boss of the needle sleeve.
[0018] The puncture needle is inserted into the needle sleeve.
[0019] A U-shaped frame is fixed on the right side of the needle sleeve, and two wings are extended to the right from the U-shaped frame.
[0020] A wing protrusion is fixed to the lower right outer side of each wing to hold open the lower card during puncture.
[0021] There is a wing slot at the lower right corner of each wing, which is stuck to the left side of the button protrusion when not puncturing.
[0022] The right end of the puncture needle is inserted into the positioning tube.
[0023] An auxiliary main body box is fixed on the left side of the main body box.
[0024] The U-shaped frame on the right side of the needle sleeve is arranged between the auxiliary body box and the body box.
[0025] The support sleeve is sleeved on the needle sleeve, and the right side of the support sleeve is movably connected with the left side of the auxiliary body box.
[0026] There is a left limit groove in the auxiliary body box, and its position corresponds to the left side of the U-shaped frame.
[0027] The auxiliary body box also has a U-shaped frame slideway assembly.
[0028] Its advantages are:
[0029] The advantage of this puncture needle over ordinary puncture needles is that it avoids accidental puncture of medical staff and reduces the risk of accidental puncture of the posterior wall of the stomach during surgery, reduces the pain of patients during gastrostomy surgery, and is low-risk and safer. BRIEF DESCRIPTION OF THE DRAWINGS
[0030] Figure 1 It is a top view of the utility model.
[0031] Figure 2 It is a front view of the utility model.
[0032] Figure 3 This is the left side view of the main box.
[0033] Figure 4 It is a left-side stereoscopic view of the body box.
[0034] Figure 5 Assembly structure diagram of the release button and the vertical spring.
[0035] Figure 6 Top view of the release button.
[0036] Figure 7 Top view of the needle sleeve.
[0037] Figure 8 Right part of the front view of the needle sleeve.
[0038] Figure 9 Front view of the support sleeve.
[0039] Figure 10 Schematic diagram of the puncture needle.
[0040] Figure 11 Schematic diagram of the sliding card.
[0041] Figure 12 Schematic diagram of the fixed card.
[0042] Figure 13 Assembly top view of the needle sleeve, horizontal spring, sleeve and fixed piece.
[0043] Figure 14 Exploded assembly diagram of the needle sleeve, horizontal spring, sleeve and body box.
[0044] Figure 15 Exploded assembly diagram of the needle sleeve, body box and auxiliary body box.
[0045] Figure 16 Right view of the auxiliary body box.
[0046] Figure 17 Left view of the auxiliary body box.
[0047] Figure 18 Left view of the body box, button protrusion, upper card group, lower card group, wings and wing protrusions (lock not released, needle tip cannot extend).
[0048] Figure 19 For Figure 18 Left view when the release button is pressed down in , the lock is released, and the needle tip can extend as needed.
[0049] Figure 20 Left view when the needle sleeve 4 moves leftward, the needle tip extends, the wing protrusions push the lower card open forward and backward, and the button protrusion slides upward into the inner surface of the lower card to prepare for locking up again.
[0050] Main body box 1, auxiliary main body box 2 (holding part), release button 3, needle sleeve 4, supporting sleeve 5, puncture needle 6, vertical spring 7, wing card slot 8, connecting pipe boss 9, stop bar 10, upper card group 11, lower card group 12, upper card 13, lower card 14, card slot 15, positioning pipe 16, needle tip protrusion 17, needle sleeve positioning groove 18, wing 19, wing protrusion 20, fixing piece 21, fixing card 22, sliding card 23, horizontal spring 24, sleeve 25, inner boss of needle sleeve 26, button protrusion 27, upper protrusion 28, lower protrusion 29, upper limit plate 30, lower limit plate 31, wing limit plate 32, L-shaped connecting claw 33, connecting pipe 34, left limit slot 35, U-shaped frame 36, space 37, release button opening 38. Detailed implementation mode
[0051] A telescopic puncture needle, comprising a main body box 1, an auxiliary main body box 2, a release button 3, a needle sleeve 4 and a puncture needle 6.
[0052] On the right side of the main body box 1 (plastic part), there is a release button opening 38, and a release button 3 (plastic part) is arranged.
[0053] The release button 3 is a long rectangle, and button protrusions 27 are integrally fixed on the outer sides of the two vertical sides respectively. The button protrusions 27 are arranged in the front-back direction inside the main body box 1.
[0054] The button protrusion 27 is in the shape of an isosceles right triangle. One right-angled side is integrally fixed on the release button 3, the other right-angled side is horizontal and above, and the hypotenuse is below.
[0055] There is a vertical spring 7 below the release button 3, and the two ends of the vertical spring 7 are respectively abutted against the release button 3 and the lower surface of the main body box 1.
[0056] There are two groups of card groups inside the main body box 1, namely the upper card group 11 and the lower card group 12.
[0057] The upper card group 11 includes two upper cards 13 arranged front and back.
[0058] The lower card group 12 includes two lower cards 14 arranged front and back.
[0059] The upper card 13 and the lower card 14 are both arranged vertically, divided into upper and lower positions, and the gap between them is the card slot 15.
[0060] The right ends of the two upper cards 13 and the two lower cards 14 are integrally fixed inside the right side wall of the main body box 1.
[0061] A positioning pipe 16 is integrally fixed inside the right side wall of the main body box 1.
[0062] The puncture needle 6 is a metal part (stainless steel), with a needle tip on the left side, and the needle tip has a needle tip protrusion 17 corresponding to the needle sleeve positioning groove 18 at the left side opening of the needle sleeve 4.
[0063] On the right side of the puncture needle 6, there is a fixing piece 21, and the fixing piece 21 can be two fixing cards 22 and one sliding card 23.
[0064] A cannula 25 is sleeved on the puncture needle 6, and the cannula 25 and the puncture needle 6 are in clearance fit.
[0065] A transverse spring 24 is sleeved outside the cannula 25, and both ends of the transverse spring 24 are respectively abutted against the fixing piece 21 and the inner convex platform 26 of the needle sleeve.
[0066] The whole needle sleeve 4 is a cylindrical tube (plastic part). The puncture needle 6 is inserted into the needle sleeve 4.
[0067] On the right side of the needle sleeve 4, a U-shaped frame 36 is integrally fixed, and the U-shaped frame 36 extends two wings 19 to the right.
[0068] On the lower part of the right outer side of each wing 19, a wing protrusion 20 is integrally fixed.
[0069] On the lower right corner of each wing 19, a wing card slot 8 is opened.
[0070] The right end of the puncture needle 6 is inserted into the positioning tube 16 and abuts against the right side wall of the main body box 1.
[0071] On the left side of the main body box 1, an auxiliary main body box 2 (plastic part) is fixed, and they can be fastened by a buckle. For example: the main body box 1 is provided with an opening, and the auxiliary main body box 2 is provided with a protrusion.
[0072] The U-shaped frame 36 on the right side of the needle sleeve 4 is arranged between the auxiliary main body box 2 and the main body box 1.
[0073] A supporting sleeve 5 is sleeved on the needle sleeve 4, and the right side of the supporting sleeve 5 is movably connected to the left side of the auxiliary main body box 2. The movable connection can adopt the common movable connection structure in the field.
[0074] In order to make the left and right sliding positions of the puncture needle 6 and the needle sleeve 4 more accurate.
[0075] The auxiliary main body box 2 has a U-shaped frame slideway assembly, and the U-shaped frame slideway assembly includes an upper limit plate 30, a lower limit plate 31 and two wing limit plates 32.
[0076] On the upper left side of the U-shaped frame 36, an upper protrusion 28 is integrally fixed, and in the auxiliary main body box 2, a vertically arranged upper limit plate 30 is integrally fixed.
[0077] On the lower left side of the U-shaped frame 36, a lower protrusion 29 is integrally fixed, and in the auxiliary main body box 2, a vertically arranged lower limit plate 31 is integrally fixed.
[0078] In the auxiliary main body box 2, there are also wing limit plates 32 integrally fixed before and after.
[0079] The upper limit plate 30, the lower limit plate 31 and the two wing limit plates 32 limit the more precise left - right sliding of the U - shaped frame 36 in the up - down, front - back directions.
[0080] Both the upper protrusion 28 and the lower protrusion 29 are plate - shaped. The height of the upper protrusion 28 in the up - down direction is higher than that of the lower protrusion 29 in the up - down direction, and the corresponding height between the upper limit plate 30 and the lower limit plate 31 is different, which can prevent reverse installation.
[0081] There is a left limit groove 35 on the lower limit plate 31 to hold the lower protrusion 29 for positioning, and the travel length of the U - shaped frame 36 in the auxiliary body box 2 is set.
[0082] The support sleeve 5 is connected to the auxiliary body box 2.
[0083] The connection method in this embodiment is that two L - shaped connecting claws 33 are integrally fixed to the right - hand hole of the support sleeve 5 (made of HDPE).
[0084] The connecting pipe 34 is integrally fixed to the edge of the left - hand hole of the auxiliary body box 2. The connecting pipe boss 9 is integrally fixed to the outlet of the connecting pipe 34. The connecting pipe boss 9 is integrally fixed with a stop bar 10 in the diagonal direction, such as the front - upper, rear - lower directions.
[0085] The width of the connecting pipe boss 9 in the front - back direction is less than the height in the up - down direction.
[0086] The L - shaped connecting claw 33 aligns with the connecting pipe 34 and the connecting pipe boss 9 in the front - back direction. After rotating 90 degrees, the L - shaped connecting claw 33 is caught by the connecting pipe boss 9 and the stop bar 10.
[0087] Its working principle is as follows:
[0088] When this puncture needle is assembled and not in use, the auxiliary body box 2 is fixed to the body box 1, and the support sleeve 5 is connected to the auxiliary body box 2.
[0089] As Figure 8 and 18 shown: The two button protrusions 27 are caught by the card slots 15 in the up - down direction. The right end of the puncture needle 6 is inserted into the positioning tube 16. The wing protrusion 20 is located on the left side of the upper card group 11 and the lower card group 12. The horizontal spring 24 is compressed. The wing 19 is located in the space 37 between the contact button 3 and the upper card group 11 and the lower card group 12. The wing card slot 8 is caught by the button protrusion 27 and cannot move to the right, and the needle sleeve 4 cannot move to the right, so the left - hand tip of the needle cannot pierce out. In this way, even if medical staff touches the left end of the retractable puncture needle, they will not touch the tip of the puncture needle, avoiding the risk of being stabbed.
[0090] During the actual gastrostomy surgery, when it is necessary to puncture the gastric wall, press the release button 3, and the two button protrusions 27 push down the front, rear, and lower cards 14 and are stuck below the lower card 14. The space 37 between the upper card group 11 and the lower card group 12 and the release button 3 is no longer restricted, and this space 37 is reserved for the wings 19 to move left and right.
[0091] Then hold the auxiliary body box 2 and the body box 1 and move them to the left. At this time, the holding sleeve 5, the needle sleeve 4, and the puncture needle 6 have been aligned with the position to be punctured. After the left end of the needle sleeve 4 touches the human tissue, it is subjected to a rightward resistance, which pushes the needle sleeve 4 to move to the right. At this time, the two wings 19 of the needle sleeve 4 move to the right, and the wing protrusions 20 push the two lower cards 14 to the front and back. The button protrusion 27 is pushed upward by the vertical spring 7, and the wing protrusions 20 slide into the right inner sides of the two lower cards 14. As Figure 19 shown, the retractable horizontal spring 24 rebounds to the left, the wing protrusions 20 return to the left side of the upper card group 11 and the lower card group 12, the button protrusion 27 moves upward along the inner surface of the lower card 14 into the card slot 15, the inner boss 26 of the needle sleeve moves to the right to compress the horizontal spring 24 until both ends of the sleeve 25 abut against the inner boss 26 of the needle sleeve and the fixed card 22 to restrict the needle sleeve 4 from continuing to move to the right. The left tip has protruded and the puncture is completed. After successfully puncturing the gastric wall, the left tip also retracts into the needle sleeve 4. Due to the setting of the length of the sleeve 25, the length of the tip protruding can be controlled, thereby preventing accidental puncture of the posterior gastric wall. The outer part of the auxiliary body box 2 and the body box 1 adopts the design of the wing holding part, so as to better control the telescopic puncture needle for puncture. After puncture, rotate 90° to release the connection between the holding sleeve 5 and the auxiliary body box 2. Leave the holding sleeve 5 for the gastrostomy tube to pass through.
Claims
1. A telescopic puncture needle, comprising a main body box (1), an auxiliary main body box (2), a release button (3), a needle cover (4) and a puncture needle (6); characterized in that: A release button (3) is provided inside the main body box (1); The release button (3) is in the shape of a square frame, and button protrusions (27) are respectively fixed outside the two vertical sides; the button protrusions (27) are arranged in the front-to-back direction in the main body box (1); A vertical spring (7) is provided below the release button (3), and two ends of the vertical spring (7) respectively abut against the release button (3) and the lower surface of the main body box (1); An upper card group (11) and a lower card group (12) are fixed inside the main body box (1); The upper card group (11) includes two vertical cards (13) arranged front and back; The lower card set (12) includes two vertically downward cards (14) arranged front and back; The space between the upper card (13) and the lower card (14) is a card slot (15) for locking the button protrusion (27) when not puncturing; The right ends of the upper card (13) and the lower card (14) are both fixed inside the right side wall of the body box (1); A positioning tube (16) is fixedly arranged in the right side wall of the main body box (1); A fixing plate (21) is provided on the right side of the puncture needle (6); A sleeve (25) is sleeved on the puncture needle (6), and the sleeve (25) and the puncture needle (6) are clearance-matched; A transverse spring (24) is disposed outside the sleeve (25), and two ends of the transverse spring (24) are respectively pressed against the fixing plate (21) and the inner boss (26) of the needle sleeve; The puncture needle (6) is inserted into the needle sleeve (4); A U-shaped frame (36) is fixed on the right side of the needle sleeve (4), and the U-shaped frame (36) extends two wings (19) to the right; A wing protrusion (20) is fixed to the lower right outer side of each wing (19) for holding open the lower card (14) during puncture; Each wing (19) is provided with a wing slot (8) at the lower right corner, which is stuck to the left side of the button protrusion (27) when not puncturing; The right end of the puncture needle (6) is inserted into the positioning tube (16); An auxiliary main body box (2) is fixed on the left side of the main body box (1); The U-shaped frame (36) on the right side of the needle sleeve (4) is arranged between the auxiliary body box (2) and the body box (1); The support sleeve (5) is sleeved on the needle sleeve (4), and the right side of the support sleeve (5) is movably connected to the left side of the auxiliary body box (2); A left limiting groove (35) is provided in the auxiliary body box (2), and its position corresponds to the left side of the U-shaped frame (36).
2. A telescopic puncture needle according to claim 1, characterized in that: The button protrusion (27) is in the shape of a right triangle, one right angle side is fixed on the release button (3), the other right angle side is horizontally at the top, and the hypotenuse is at the bottom.
3. The telescopic puncture needle according to claim 1, characterized in that: The needle tip on the left side of the puncture needle (6) has a needle tip protrusion (17) corresponding to the needle sleeve positioning groove (18) on the left side of the needle sleeve (4).
4. The telescopic puncture needle according to claim 1, characterized in that: The auxiliary body box (2) also has a U-shaped frame slideway assembly, and the U-shaped frame slideway assembly includes an upper limit plate (30), a lower limit plate (31) and two wing limit plates (32); An upper protrusion (28) is fixed on the upper left side of the U-shaped frame (36), and a vertical upper limit plate (30) is fixedly arranged in the auxiliary body box (2); A lower protrusion (29) is fixed at the lower left side of the U-shaped frame (36), and a vertical downward limit plate (31) is fixedly arranged in the auxiliary body box (2); A left limit groove (35) is provided on the lower limit plate (31); There are also wing limiting plates (32) fixedly arranged at the front and rear of the auxiliary body box (2).
5. The telescopic puncture needle according to claim 4, characterized in that: The upper protrusion (28) and the lower protrusion (29) are both plate-shaped, and the height of the upper protrusion (28) in the vertical direction is higher than the height of the lower protrusion (29) in the vertical direction.
6. The telescopic puncture needle according to claim 1, characterized in that: The movable connection structure between the support sleeve (5) and the auxiliary body box (2) is as follows: Two L-shaped connecting claws (33) are fixed to the right side hole of the support sleeve (5); A connecting pipe (34) is fixed to the edge of the left hole of the auxiliary body box (2), a connecting pipe boss (9) is fixed to the outlet of the connecting pipe (34), and a blocking strip (10) is provided in the diagonal direction of the connecting pipe boss (9); The front-to-back width of the connecting pipe boss (9) is smaller than the top-to-bottom height; The L-shaped connecting claw (33) is clamped on the connecting pipe (34) and the connecting pipe boss (9).