Single-use dialysis indwelling needle

Abstract

This invention provides a disposable dialysis insertion needle, comprising a cannula, a needle cap, a needle handle, a soft extension tube, and a Y-shaped connector connected to one end of the extension tube. The Y-shaped connector includes a positive pressure connector end and a dialysis tube connection end. The dialysis tube connection end is a short tube with a first internal thread on its inner wall, which matches the external thread at the end of the dialysis tube. The extension tube is equipped with a clamping assembly, which includes a U-shaped seat, through holes on opposite sides of the U-shaped seat, a fixing block fixed in the middle of the bottom wall of the U-shaped seat, a movable thin plate rotatably connected to the upper end of the first side wall of the U-shaped seat, and a pressure block fixing the movable thin plate near the fixing block. Compared with hemostatic forceps clamping, this invention offers better clamping effect, simpler operation, and can be operated by medical staff with one hand, improving work efficiency. It can be threadedly connected to the end of the dialysis tube, making operation more convenient and the connection tighter, effectively preventing air from entering and improving safety during hemodialysis.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a disposable dialysis indwelling needle. Background Technology

[0002] A dialysis indwelling needle is a medical tool in which the catheter and needle core are inserted into a blood vessel together during dialysis. Once the catheter is fully inserted into the blood vessel, the needle core is withdrawn, leaving only the soft catheter in the blood vessel for intravenous infusion. This can reduce the pain caused by repeated vascular punctures and reduce damage to the patient's blood vessels.

[0003] To prevent bleeding after puncture, the existing indwelling needles for dialysis require clamping the tubing in the middle with hemostatic forceps. This is inconvenient, and the hemostatic forceps are heavy and can easily cause the indwelling needle to move, leading to patient discomfort and the possibility of medical accidents. At the same time, the tail end of the current indwelling needle is not convenient to match and connect with the dialysis tubing. If the connection is not tight, it can easily cause air to enter and affect the efficiency of normal hemodialysis operation.

[0004] In summary, there is an urgent need to design a disposable dialysis puncture catheter that overcomes the aforementioned problems. Utility Model Content

[0005] The purpose of this invention is to provide a disposable dialysis indwelling needle that overcomes the above-mentioned problems.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is: a disposable dialysis puncture indwelling needle, comprising:

[0007] The cannula, needle cap, needle shank, flexible extension tube, and Y-type connector connected to one end of the extension tube;

[0008] The Y-type connector includes a positive pressure connector end and a dialysis tube connection end. The dialysis tube connection end is a short tube with a first internal thread on the inner wall of the short tube. The first internal thread matches the external thread at the end of the dialysis tube. A protective cap is detachably connected to the outer wall of the short tube.

[0009] The extension tube is provided with a clamping assembly, which includes a U-shaped seat, through holes opened on the two side walls of the U-shaped seat, a fixing block fixed in the middle of the bottom wall of the U-shaped seat, a movable thin plate with one end rotatably connected to the upper end of the first side wall of the U-shaped seat, and a pressure block fixing the movable thin plate near the fixing block. The other end of the movable thin plate is connected to the second side wall of the U-shaped seat by a snap fastener. The upper surface of the fixing block is provided with a pressure groove that matches the pressure block. The extension tube passes through the through hole.

[0010] The purpose of this utility model and the technical problems to be solved can be further achieved by the following technical measures.

[0011] Furthermore, a groove is provided on the upper surface of the first sidewall, a protrusion is provided in the middle of one end of the movable sheet, the two ends of the protrusion are rotatably connected to the groove through a rotating shaft, a torsion spring is sleeved on the outer wall of the rotating shaft, and the two ends of the torsion spring are fixedly connected to the movable sheet and the first sidewall respectively.

[0012] Furthermore, the end of the movable sheet away from the first sidewall is integrally connected with an upward first hook, and the upper inner side of the second sidewall is integrally connected with a downward second hook, which engages with the first hook.

[0013] Furthermore, both the fixing block and the pressing block have square cross-sections, and the pressing groove is a square groove with a width slightly larger than the diameter of the through hole and the width of the pressing block.

[0014] Furthermore, the lowest point of the through hole is higher than the highest point of the fixing block.

[0015] Furthermore, the movable sheet is made of rigid plastic and has elastic ends.

[0016] Furthermore, the inner wall of the protective cap is provided with a second internal thread, and the outer wall of the short tube is provided with a first external thread that matches the second internal thread.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. The disposable dialysis indwelling needle of this utility model has a clamping component on the extension tube. The clamping component includes a U-shaped seat, a fixing block, a movable thin plate, and a pressure block. A pressure groove matching the pressure block is opened on the upper surface of the fixing block. The extension tube is inserted into two through holes. By rotating the movable thin plate to one side of the U-shaped seat, the pressure block can press the soft extension tube into the pressure groove in the middle of the fixing block. Finally, by snapping the other end of the movable thin plate to the upper end of the second side wall of the U-shaped seat, the movable thin plate and the pressure block are fixed, and the extension tube is clamped. Compared with hemostatic forceps clamping, the clamping effect is better, the operation is simple, and medical staff can operate with one hand, which improves work efficiency.

[0019] 2. The disposable dialysis indwelling needle of this utility model is designed with a Y-shaped connector as a positive pressure connector end and a dialysis tube connection end. The dialysis tube connection end is a short tube with a first internal thread, which can match the external thread at the end of the dialysis tube. This not only facilitates connection for medical staff and makes operation more convenient and improves the efficiency of hemodialysis operation, but also makes the connection tighter, effectively preventing air from entering and improving the safety of the hemodialysis process. Attached Figure Description

[0020] Figure 1This is a schematic diagram of the overall structure of the disposable dialysis indwelling needle provided by this utility model;

[0021] Figure 2 This is a schematic diagram of the overall structure of the disposable dialysis indwelling needle provided by this utility model (after the heparin cap is removed);

[0022] Figure 3 This is a cross-sectional structural diagram of the clamping component in an embodiment of this utility model;

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Cannula;

[0025] 2. Needle cap;

[0026] 3. Needle handle;

[0027] 4. Extension tube;

[0028] 5. Y-type connector; 51. Positive pressure connector end; 52. Dialysis tubing connection end; 521. Short tube; 522. First internal thread; 523. First external thread; 524. Protective cap; 5241. Second internal thread;

[0029] 6. Clamping assembly; 61. U-shaped seat; 611. First side wall; 612. Second side wall; 613. Groove; 614. Second hook; 62. Through hole; 63. Fixing block; 631. Pressure groove; 64. Movable sheet; 641. Protrusion; 642. First hook; 65. Pressure block; 66. Rotating shaft; 67. Torsion spring. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0031] Please see Figures 1 to 3 A disposable dialysis catheter, comprising:

[0032] 1. Cannula needle, 2. Needle cap, 3. Soft extension tube, 4. and Y-type connector 5 connected to one end of the extension tube 4;

[0033] The Y-type connector 5 includes a positive pressure connector end 51 and a dialysis tubing connection end 52. The positive pressure connector end 51 is existing technology, and the dialysis tubing connection end 52 is an improvement on the heparin cap end of the existing technology. Figure 1 and Figure 2As shown, the dialysis tube connection end 52 is a short tube 521. The inner wall of the short tube 521 is provided with a first internal thread 522, which matches the external thread at the end of the dialysis tube, so as to facilitate matching and connection with the external thread port of the dialysis tube. The outer wall of the short tube 521 is detachably connected with a protective cap 524, which serves to protect the short tube 521 before it is connected to the port of the dialysis tube or syringe.

[0034] The extension tube 4 is provided with a clamping assembly 6, which includes a U-shaped seat 61, through holes 62 opened on the two side walls of the U-shaped seat 61, a fixing block 63 fixed in the middle of the bottom wall of the U-shaped seat 61, a movable thin plate 64 with one end rotatably connected to the upper end of the first side wall 611 of the U-shaped seat 61, and a pressure block 65 fixing the movable thin plate 64 near the fixing block 63. The other end of the movable thin plate 64 is connected to the second side wall 612 of the U-shaped seat 61 by a snap-fit. The upper surface of the fixing block 63 is provided with a pressure groove 631 that matches the pressure block 65. The extension tube 4 passes through the through hole 62. By rotating the movable sheet 64 to one side of the U-shaped seat 61, the pressure block 65 can press the soft extension tube 4 into the pressure groove 631 in the middle of the fixed block 63. Finally, by snapping the other end of the movable sheet 64 to the upper end of the second side wall 612 of the U-shaped seat 61, the movable sheet 64 and the pressure block 65 are fixed, and the extension tube 4 is clamped. Compared with hemostatic forceps, the clamping effect is better, the operation is simple, and medical staff can operate with one hand, which improves work efficiency.

[0035] Preferably, a groove 613 is formed on the upper surface of the first sidewall 611, and a protrusion 641 is provided in the middle of one end of the movable sheet 64. The two ends of the protrusion 641 are rotatably connected to the groove 613 through a rotating shaft 66. A torsion spring 67 is sleeved on the outer wall of the rotating shaft 66, and the two ends of the torsion spring 67 are fixedly connected to the movable sheet 64 and the first sidewall 611, respectively. When the movable sheet 64 is manually disengaged from the second sidewall 612 of the U-shaped seat 61, the torsion spring 67 can cause the movable sheet 64 to drive the pressure block 65 out of the pressure groove 631, thereby contacting the compression of the extension tube 4, causing the extension tube 4 to expand and move out of the pressure groove 631.

[0036] Preferably, the movable sheet 64 is integrally connected to an upward first hook 642 at the end away from the first sidewall 611, and the upper inner side of the second sidewall 612 is integrally connected to a downward second hook 614, which cooperates with the first hook 642.

[0037] Preferably, the cross-sections of the fixing block 63 and the pressing block 65 are both square, and the pressing groove 631 is a square groove. The width of the square groove is slightly larger than the diameter of the through hole 62 and the width of the pressing block 65, so that the extension tube 4 can be completely pressed into the pressing groove 631 by the pressing block 65.

[0038] Preferably, the lowest point of the through hole 62 is higher than the highest point of the fixing block 63, so that when the extension tube 4 is not clamped, the extension tube rests flat on the fixing block 63.

[0039] Preferably, the movable sheet 64 is made of rigid plastic and its end is elastic, which facilitates the elastic force generated at the end of the first hook 642 so that it can be smoothly engaged in the second hook 614.

[0040] Preferably, the inner wall of the protective cap 524 is provided with a second internal thread 5241, and the outer wall of the short tube 521 is provided with a first external thread 523 that matches the second internal thread 5241. During hemodialysis or drug injection, the protective cap 524 can be unscrewed, and the port of the dialysis tubing or syringe can be connected to the short tube 521 via the thread, thereby enabling hemodialysis or drug injection. The protective cap 524 can prevent the short tube 521 from being contaminated before connecting the dialysis tubing or syringe, ensuring its cleanliness and hygiene.

[0041] The present invention has been further described above with reference to the embodiments, but the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A disposable dialysis puncture indwelling needle, comprising a cannula (1), a needle cap (2), a needle handle (3), a soft extension tube (4), and a Y-type connector (5) connected to one end of the extension tube (4), characterized in that: The Y-type connector (5) includes a positive pressure connector end (51) and a dialysis tube connection end (52). The dialysis tube connection end (52) is a short tube (521). The inner wall of the short tube (521) is provided with a first internal thread (522). The first internal thread (522) matches the external thread at the end of the dialysis tube. The outer wall of the short tube (521) is detachably connected with a protective cap (524). The extension tube (4) is provided with a clamping assembly (6). The clamping assembly (6) includes a U-shaped seat (61), through holes (62) opened on the two side walls of the U-shaped seat (61), a fixing block (63) fixed in the middle of the bottom wall of the U-shaped seat (61), a movable thin plate (64) with one end rotatably connected to the upper end of the first side wall (611) of the U-shaped seat (61), and a pressure block (65) fixing the movable thin plate (64) near the side of the fixing block (63). The other end of the movable thin plate (64) is connected to the second side wall (612) of the U-shaped seat (61) by a snap fastener. The upper surface of the fixing block (63) is provided with a pressure groove (631) matching the pressure block (65). The extension tube (4) passes through the through hole (62).

2. The disposable dialysis puncture needle according to claim 1, characterized in that, The upper surface of the first sidewall (611) is provided with a groove (613), and one end of the movable sheet (64) is provided with a protrusion (641). The two ends of the protrusion (641) are rotatably connected to the groove (613) through a rotating shaft (66). The outer wall of the rotating shaft (66) is fitted with a torsion spring (67), and the two ends of the torsion spring (67) are fixedly connected to the movable sheet (64) and the first sidewall (611) respectively.

3. The disposable dialysis puncture needle according to claim 1 or 2, characterized in that, The movable sheet (64) has an upward first hook (642) integrally connected to one end away from the first sidewall (611), and a downward second hook (614) integrally connected to the inner side of the upper end of the second sidewall (612), and the second hook (614) is engaged with the first hook (642).

4. The disposable dialysis indwelling needle according to claim 1, characterized in that, The cross-sections of the fixing block (63) and the pressure block (65) are both square, and the pressure groove (631) is a square groove with a width slightly larger than the diameter of the through hole (62) and the width of the pressure block (65).

5. The disposable dialysis indwelling needle according to claim 1, characterized in that, The lowest point of the through hole (62) is higher than the highest point of the fixing block (63).

6. The disposable dialysis puncture needle according to claim 1 or 2, characterized in that, The movable sheet (64) is made of rigid plastic and has elastic ends.

7. The disposable dialysis puncture needle according to claim 1, characterized in that, The inner wall of the protective cap (524) is provided with a second internal thread (5241), and the outer wall of the short tube (521) is provided with a first external thread (523) that matches the second internal thread (5241).

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