Puncture needle with guide wire sealing piece and medium-length catheter assembly

Abstract

The utility model relates to a puncture needle with a guide wire sealing piece and a medium-length catheter assembly. The puncture needle with the guide wire sealing piece comprises a puncture assembly and the guide wire sealing piece. The puncture assembly comprises a needle tube; the medium-length catheter assembly comprises the puncture needle, a buckling seat, a catheter assembly and a guide wire assembly. The conduit assembly comprises a midline conduit; the guide wire assembly comprises a guide wire; the puncture assembly is connected with the guide wire assembly through a Luer locking connector A and a Luer locking connector B; the center line catheter, the needle tube and the guide wire are sequentially connected from outside to inside in a sleeved mode and penetrate out of the fixed tube body. The tail end of the needle tube is blocked through the guide wire sealing piece, meanwhile, the guide wire can penetrate out of the guide wire sealing piece and enter the needle tube, and blood is prevented from flowing out of a gap between an inner hole of the needle tube and the guide wire.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of medical apparatus and instruments, in particular to a puncture needle with guide wire sealing element and medium length catheter assembly. BACKGROUND

[0002] Medium length catheter is a kind of pipeline for medical operation, usually moderate length, easy to insert and operate. Mainly applied to the occasion of intravenous infusion, help doctors effectively deliver liquid. According to specific use, these catheters can have different materials and designs to ensure safety and effectiveness.

[0003] The application patent application with the application publication number CN117531091A discloses a medium length catheter;The needle tube of the medium length catheter leaves a gap between the guide wire, so in the process of puncture catheterization, blood is easily flowed out from the gap between the guide wire and the inner hole of the needle tube;Therefore, a medium length catheter catheterization assembly that can be sealed is required. UTILITY MODEL CONTENT

[0004] The utility model aims at solving above-mentioned problem, provide a puncture needle with guide wire sealing element and medium length catheter assembly.

[0005] The technical scheme of the utility model is: a puncture needle with guide wire sealing element, including puncture assembly and guide wire sealing element;

[0006] The puncture assembly includes needle tube, sliding sleeve and puncture needle seat;The needle tube is hollow, the tail end is fixedly connected with the puncture needle seat, and the sharp end of the needle tube exceeds the front end of the sliding sleeve;The puncture needle seat is connected with the tail end of the sliding sleeve;Luer lock connector A is arranged at the tail end of the puncture needle seat;The guide wire sealing element is arranged in the luer lock connector A and abuts against the tail end of the needle tube;Straight-through groove is arranged on the sliding sleeve;The front section of the sliding sleeve is further provided with a clamping protrusion A.The tail end of the needle tube is blocked by the guide wire sealing element, so that blood flow from the tail of the needle tube during puncture can be avoided.

[0007] Preferably, the outer contour of the guide wire sealing element cooperates with the inner wall of the luer lock connector A. The friction between the guide wire sealing element and the inner wall of the luer lock connector A is increased, and the inner cavity of the luer lock connector A can be filled completely, preventing the guide wire sealing element from deviating and affecting the sealing effect.

[0008] A medium length catheter assembly comprising the above-mentioned puncture needle with guide wire sealing element further comprises a clamping seat, a catheter assembly and a guide wire assembly;

[0009] The clamping seat is hollow, and the inner wall is provided with a clamping groove, and the outer wall is provided with a clamping recess;

[0010] The catheter assembly includes a T-shaped catheter seat, a midline catheter, and an infusion extension tube; the T-shaped catheter seat is divided into a vertical tube joint, a buckle joint, and a sealing end, and the three ends of the T-shaped catheter seat are connected; a buckle is provided on the outer wall of the buckle joint, and the buckle can match the card groove on the inner wall of the buckle seat; an injection rubber pad is provided in the sealing end to seal the sealing end; the injection rubber pad can seal the catheter after placement and provide an infusion window; and the injection rubber pad can prevent blood from flowing out of the gap between the inner wall of the midline catheter and the outer wall of the needle tube. The midline catheter is connected to the inner wall of the buckle joint, and the infusion extension tube is connected to the inner wall of the vertical tube joint;

[0011] The guide wire assembly includes a guide wire, a guide wire slide, a guide wire slide seat and a Luer lock connector B; the guide wire slide rail is cylindrical and connected to the end of the Luer lock connector B; the end of the guide wire is fixedly connected to the guide wire slide seat, and the guide wire passes through the Luer lock connector B; the guide wire slide seat is installed in the guide wire slide rail; the guide wire passes through the middle of the guide wire seal; the guide wire seal blocks the end of the needle tube, and at the same time the guide wire can pass through the guide wire seal and enter the interior of the needle tube, preventing blood from flowing out of the gap between the inner hole of the needle tube and the guide wire.

[0012] The puncture assembly and the guidewire assembly are connected via a Luer lock connector; a guidewire seal is used to seal between the two parts of the Luer lock connector, thereby preventing blood from flowing out of the gap between the puncture assembly and the guidewire assembly; and the tightness of the guidewire seal can be adjusted by rotating the Luer lock connector to adjust the sealing effect.

[0013] The buckle seat is installed at the front end of the puncture assembly. The front section of the buckle seat is provided with a fixed tube body, the inner diameter of which matches the outer diameter of the midline catheter. The locking groove cooperates with the locking protrusion on the puncture needle. The buckle seat can fix the catheter assembly.

[0014] The T-shaped catheter seat is installed in the sliding sleeve, the vertical pipe joint cooperates with the straight-through groove, and the buckle joint points to the buckle seat; the T-shaped catheter seat can slide along the straight-through groove, and finally the buckle joint is connected and locked with the buckle seat.

[0015] The midline catheter, needle tube and guide wire are sleeved in sequence from outside to inside and pass through the fixed tube body. The fixed tube body of the buckle seat can provide guidance for the midline catheter.

[0016] Preferably, the end of the infusion extension tube is also provided with a positive pressure connector to provide a positive pressure tube seal and reduce the risk of catheter blockage.

[0017] Preferably, the front end of the midline catheter is further provided with a side hole, so that the catheter can be prevented from being blocked by blood clots or suction to the blood vessel wall by rotating the T-shaped catheter seat.

[0018] Preferably, the tip of the midline catheter is tapered, which can reduce the difficulty of catheterization and make the catheterization process smoother.

[0019] Preferably, a retaining protrusion B is provided at the rear end of the inner wall of the sliding sleeve, and a retaining groove B is provided on the outer wall of the sealing end of the T-shaped catheter seat, wherein the retaining protrusion B matches the retaining groove B. The T-shaped catheter seat and the sliding sleeve are fixed in position, thereby preventing the catheter from sliding during transportation and preventing the needle from damaging the catheter.

[0020] Preferably, the buckle seat is further provided with a fixing wing with a suture hole in the middle thereof, which can cooperate with common fixing devices on the market to fix the position of the catheter and prevent the catheter assembly from sliding.

[0021] The beneficial effects of the present invention are as follows: the puncture needle with a guide wire seal of the present invention has the following advantages:

[0022] During the puncture and catheterization process, the guidewire seal seals the end of the needle tube, while the guidewire can pass through the guidewire seal and enter the interior of the needle tube, preventing blood from flowing out of the gap between the inner hole of the needle tube and the guidewire;

[0023] The medium-length catheter assembly including the above-mentioned puncture needle has the following advantages:

[0024] (1) The tightness of the guidewire seal can be adjusted by rotating the Luer lock connector to adjust the sealing effect.

[0025] (2) The sealing end of the T-shaped catheter seat is sealed with an injection rubber pad, which can seal the catheter after placement and provide an infusion window; and the injection rubber pad can prevent blood from flowing out of the gap between the inner wall of the midline catheter and the outer wall of the needle tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic structural diagram of a puncture needle with a guidewire seal and a medium-length catheter of the present invention;

[0027] Figure 2 This is a schematic structural diagram of a puncture needle with a guide wire seal according to the present invention;

[0028] Figure 3 yes Figure 2 AA cross-sectional view;

[0029] Figure 4 It is a structural diagram of the buckle seat;

[0030] Figure 5 is a schematic structural diagram of a catheter assembly;

[0031] Figure 6 is a side view of the catheter assembly;

[0032] Figure 7 yes Figure 6 BB cross-sectional view;

[0033] Figure 8 is a schematic structural diagram of a guidewire assembly;

[0034] Figure 9 is a rear view of the guidewire assembly;

[0035] Figure 10 yes Figure 9 CC cross-sectional view;

[0036] Figure 11 This is a schematic diagram of the structure of the medium-length catheter assembly of the utility model. Figure 1 (initial state);

[0037] Figure 12 This is a schematic diagram of the structure of the medium-length catheter assembly of the utility model. Figure 2 (initial state);

[0038] Figure 13 yes Figure 12 DD cross-sectional view;

[0039] Figure 14 yes Figure 13 I enlarged view;

[0040] Figure 15 yes Figure 13 II enlarged view;

[0041] Figure 16 yes Figure 13 III enlarged view;

[0042] Figure 17 This is a front view of the medium-length catheter assembly of the present invention (catheter-inserted state);

[0043] Figure 18 yes Figure 17 EE cross-sectional view;

[0044] Figure 19 yes Figure 18 IV cross-sectional view;

[0045] Figure 20 yes Figure 18 V-section view;

[0046] Figure 21 yes Figure 18 VI sectional view.

[0047] In the figure: 11. needle tube, 12. sliding sleeve, 121. locking protrusion A, 122. locking protrusion B, 123. straight groove, 13. puncture needle seat, 131. Luer lock connector A,

[0048] 2. Buckle seat, 21. Card groove, 22. Card slot, 23. Fixed tube, 24. Fixed wing, 241. Suture hole,

[0049] 31. T-shaped catheter seat, 311. Buckle, 312. Vertical pipe joint, 313. Injection pad, 314. Positioning groove B, 32. Midline catheter, 321. Side hole, 33. Infusion extension tube, 34. Positive pressure connector,

[0050] 41. Guidewire, 42. Guidewire rail, 43. Guidewire slide, 44. Luer lock connector B, 5. Guidewire seal. DETAILED DESCRIPTION

[0051] Example 1: See Figures 1-3 , a puncture needle with a guidewire seal, comprising a puncture assembly and a guidewire seal 5;

[0052] The puncture assembly includes a needle tube 11, a sliding sleeve 12, and a puncture needle seat 13. The needle tube 11 is hollow, with its distal end fixedly connected to the puncture needle seat 13, and the tip of the needle tube 11 extends beyond the front end of the sliding sleeve 12. The puncture needle seat 13 is connected to the distal end of the sliding sleeve 12. A Luer lock connector 131 is provided at the distal end of the puncture needle seat 13. The guidewire seal 5 is disposed within the Luer lock connector 131 and abuts against the distal end of the needle tube 11. The sliding sleeve 12 is provided with a through groove 123. The front end of the sliding sleeve 12 is also provided with a locking protrusion 121. The distal end of the needle tube 11 is sealed by the guidewire seal 5, preventing blood from flowing out of the tail end of the needle tube 11 during the puncture process.

[0053] The guide wire sealing member 5 in this embodiment is a sealing rubber pad; the sealing rubber pad has a certain elasticity and can automatically hold the guide wire 41 tightly to perform sealing.

[0054] The tip of the needle tube 11 is an oblique tip and is provided with a side hole 321; the oblique tip facilitates the needle tube 11 to pass through the skin and the blood vessel wall into the blood vessel; the side hole 321 can balance the pressure inside and outside the needle tube 11, making the insertion process smoother.

[0055] The outer contour of the guidewire seal 5 matches the inner wall of the Luer lock connector 131. This increases the friction between the guidewire seal 5 and the inner wall of the Luer lock connector 131 and can fully fill the inner cavity of the Luer lock connector 131, preventing the guidewire seal 5 from deflecting and affecting the sealing effect.

[0056] The working principle of this embodiment is as follows:

[0057] During the puncture process, after the tip of the needle tube 11 pierces the blood vessel, the end of the needle tube 11 is blocked by the guide wire seal 5 , so that blood cannot rush into the inner cavity of the needle tube 11 .

[0058] Example 2: See Figures 1-21 A medium-length catheter assembly including the puncture needle with the guidewire seal described in Example 1, further comprising a buckle seat 2, a catheter assembly and a guidewire 41 assembly;

[0059] The buckle seat 2 is hollow, and its inner wall is provided with a card slot 22, and its outer wall is provided with a card groove;

[0060] The catheter assembly includes a T-shaped catheter seat 31, a midline catheter 32, and an infusion extension tube 33; the T-shaped catheter seat 31 is divided into a vertical tube joint 312, a buckle joint, and a sealing end, and the three ends of the T-shaped catheter seat 31 are connected; a buckle 311 is provided on the outer wall of the buckle joint, and the buckle 311 can match the card groove 22 on the inner wall of the buckle seat 2; an injection rubber pad 313 is provided in the sealing end to seal the sealing end; the injection rubber pad 313 can seal the catheter after placement and provide an infusion window; and the injection rubber pad 313 can prevent blood from flowing out of the gap between the inner wall of the midline catheter 32 and the outer wall of the needle tube 11. The midline catheter 32 is connected to the inner wall of the buckle joint, and the infusion extension tube 33 is connected to the inner wall of the vertical tube joint 312;

[0061] The guide wire 41 assembly includes a guide wire 41, a guide wire slide 42, a guide wire slide 43 and a Luer lock connector B 44; the guide wire slide 42 is cylindrical and connected to the end of the Luer lock connector B 44; the end of the guide wire 41 is fixedly connected to the guide wire slide 43, and the guide wire 41 passes through the Luer lock connector B 44; the guide wire slide 43 is cooperatively installed in the guide wire slide 42; the guide wire 41 passes through the middle of the guide wire seal 5; the guide wire seal 5 blocks the end of the needle tube 11, and at the same time the guide wire 41 can pass through the guide wire seal 5 and enter the interior of the needle tube 11, preventing blood from flowing out of the gap between the inner hole of the needle tube 11 and the guide wire 41.

[0062] The puncture assembly and the guidewire 41 assembly are connected through Luer lock connectors A 131 and B; a guidewire seal 5 is used to seal between the two parts of the Luer lock connector to prevent blood from flowing out of the gap between the puncture assembly and the guidewire 41 assembly; and the tightness of the guidewire seal 5 can be adjusted by rotating the Luer lock connector to adjust the sealing effect.

[0063] The buckle seat 2 is mounted at the front end of the puncture assembly. A fixed tube 23 is provided at the front end of the buckle seat 2. The inner diameter of the fixed tube 23 matches the outer diameter of the midline catheter 32. The locking groove mates with the locking protrusion 121 on the puncture needle. The buckle seat 2 can secure the catheter assembly.

[0064] The T-shaped catheter seat 31 is installed in the sliding sleeve 12, the vertical pipe joint 312 cooperates with the straight groove 123, and the buckle joint points to the buckle seat 2; the T-shaped catheter seat 31 can slide along the straight groove 123, and finally the buckle joint is connected and locked with the buckle seat 2.

[0065] The midline catheter 32, the needle tube 11 and the guide wire 41 are sequentially sleeved from the outside to the inside and pass through the fixed tube body 23. The fixed tube body 23 of the buckle seat 2 can provide a guide for the midline catheter 32.

[0066] The end of the infusion extension tube 33 is also provided with a positive pressure connector 34. Positive pressure sealing is provided to reduce the risk of catheter blockage.

[0067] The front end of the midline catheter 32 is also provided with a side hole 321. The T-shaped catheter seat 31 can be rotated to avoid catheter blockage caused by blood clots or suction to the blood vessel wall.

[0068] The rear end of the inner wall of the sleeve 12 is provided with a retaining protrusion B 122, and the outer wall of the sealing end of the T-shaped catheter seat 31 is provided with a retaining groove B 314. The retaining protrusion B 122 matches the retaining groove B 314. The T-shaped catheter seat 31 is fixedly secured to the sleeve 12, preventing the catheter from sliding during transportation and preventing the needle tube 11 from damaging the catheter.

[0069] The buckle seat 2 is further provided with a fixing wing 24, and a suture hole 241 is opened in the middle of the fixing wing 24. The fixing wing 24 can cooperate with a common fixing device on the market to fix the position of the catheter and prevent the catheter assembly from sliding.

[0070] The catheter placement process of this embodiment includes the following steps:

[0071] ① The nurse determines the insertion site on the patient's body and cleans and disinfects the site;

[0072] ② Rotate the Luer lock connector to adjust the tightness of the guidewire seal 5 so that the guidewire 41 has a certain resistance when passing through the guidewire seal 5, but can still slide normally.

[0073] ③ The nurse holds the puncture assembly and inserts the needle tube 11 through the patient's skin into the vein. The guidewire seal 5 seals the tail of the needle tube 11;

[0074] ④ Push the guide wire slide 43 to move it forward along the guide wire rail 42. At the same time, the guide wire 41 passes through the guide wire seal 5 and enters the vein along the needle tube 11. The guide wire seal 5 blocks the gap between the needle tube 11 and the guide wire 41 until the guide wire slide 43 reaches the front end of the guide wire rail 42.

[0075] ⑤ Push the T-shaped catheter seat 31 so that the T-shaped catheter seat 31 moves forward along the sliding sleeve 12, and at the same time, the midline catheter 32 enters the vein along the guide wire 41; until the T-shaped catheter seat 31 reaches the front end of the sliding sleeve 12 and is connected with the buckle seat 2;

[0076] ⑥ Disconnect the buckle seat 2 from the front end of the sliding sleeve 12, and pull out the guide wire 41 and the needle tube 11; during the withdrawal process, the injection rubber pad 313 seals the T-shaped catheter seat 31, and the guide wire seal 5 blocks the end of the needle tube 11 to prevent the residual blood in the needle tube 11 from flowing out and causing contamination.

[0077] ⑦ Use the positive pressure connector 34 to connect the flushing device and flush the midline catheter 32 through the infusion extension tube 33. At the same time, the T-shaped catheter seat 31 can be rotated to avoid blockage.

[0078] ⑧ Use the fixing wings 24 on the buckle seat 2 in conjunction with the catheter fixing device to fix the catheter; the catheterization is completed.

[0079] Example 3: See Figure 7 , Example 3 is basically the same as Example 2, and the similarities are not repeated here. The difference is that the head end of the midline catheter 32 is tapered; the tapered catheter head can reduce the difficulty of catheterization and make the catheterization process smoother.

Claims

1. A puncture needle with a guidewire seal, characterized in that: Includes a puncture assembly and a guidewire seal; The puncture assembly includes a needle tube, a sliding sleeve and a puncture needle seat; the needle tube is hollow, the end of which is fixedly connected to the puncture needle seat, and the tip of the needle tube exceeds the front end of the sliding sleeve; the puncture needle seat is connected to the end of the sliding sleeve; a Luer lock connector armor is provided at the end of the puncture needle seat; the guide wire seal is arranged in the Luer lock connector armor and abuts against the end of the needle tube; a straight-through groove is provided on the sliding sleeve; and a locking protrusion armor is also provided at the front section of the sliding sleeve.

2. The puncture needle with a guidewire seal according to claim 1, characterized in that: The outer contour of the guidewire seal mates with the inner wall of the Luer lock connector.

3. A medium-length catheter assembly comprising the puncture needle with a guidewire seal according to claim 1, characterized in that: It also includes a buckle seat, a catheter assembly and a guide wire assembly; The buckle seat is hollow, with a card slot provided on its inner wall and a card groove provided on its outer wall; The catheter assembly includes a T-shaped catheter seat, a midline catheter, and an infusion extension tube; the T-shaped catheter seat is divided into a riser joint, a buckle joint, and a sealing end, and the three ends of the T-shaped catheter seat are connected; a buckle is provided on the outer wall of the buckle joint, which can match the groove on the inner wall of the buckle seat; an injection rubber pad is provided in the sealing end to seal the sealing end; the midline catheter is connected to the inner wall of the buckle joint, and the infusion extension tube is connected to the inner wall of the riser joint; The guidewire assembly includes a guidewire, a guidewire slide, a guidewire slide seat, and a Luer lock connector B; the guidewire slide is cylindrical and connected to the end of the Luer lock connector B; the end of the guidewire is fixedly connected to the guidewire slide seat, and the guidewire passes through the Luer lock connector B; the guidewire slide seat is mounted in the guidewire slide; the guidewire passes through the middle of the guidewire seal; The puncture assembly and the guide wire assembly are connected via Luer lock connectors A and B; The buckle seat is installed at the front end of the puncture assembly; the front section of the buckle seat is provided with a fixed tube body, the inner diameter of the fixed tube body matches the outer diameter of the midline catheter; the locking groove cooperates with the locking protrusion on the puncture needle; The T-shaped conduit seat is installed in the sliding sleeve, the vertical pipe joint is matched with the straight-through groove, and the buckle joint points to the buckle seat; The midline catheter, needle tube and guide wire are sleeved in sequence from outside to inside and pass through the fixed tube body.

4. The medium-length catheter assembly according to claim 3, characterized in that: The end of the infusion extension tube is also provided with a positive pressure connector.

5. The medium-length catheter assembly according to claim 3, characterized in that: The front end of the midline catheter is also provided with a side hole.

6. The medium-length catheter assembly according to claim 3, characterized in that: The tip end of the midline catheter is tapered.

7. The medium-length catheter assembly according to claim 3, characterized in that: The tail of the inner wall of the sliding sleeve is provided with a locking protrusion B, and the outer wall of the sealing end of the T-shaped catheter seat is provided with a locking groove B, and the locking protrusion B matches the locking groove B.

8. The mid-length catheter assembly according to claim 3, wherein: The buckle seat is also provided with a fixing wing, and a suture hole is opened in the middle of the fixing wing.

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