CN113181546B

CN113181546B - Hemodialysis pipe tip locking structure

Info

Publication number: CN113181546B
Application number: CN202110472757.0A
Authority: CN
Inventors: 张恬; 周宇晖; 胡绍兰
Original assignee: First Peoples Hospital of Qujing
Current assignee: First Peoples Hospital of Qujing
Priority date: 2021-04-29
Filing date: 2021-04-29
Publication date: 2022-08-02
Anticipated expiration: 2041-04-29
Also published as: CN113181546A

Abstract

The invention discloses a hemodialysis catheter end locking structure which comprises a hemodialysis catheter and a heparin cap matched with the hemodialysis catheter in a connecting mode, wherein a locking strip is arranged on the heparin cap and comprises a first end and a second end which are opposite in position, the locking strip is connected to the heparin cap in a rotatable mode through a hinge point at the position close to the second end, a top block is arranged on the locking strip and located between the hinge point and the end part of the second end, the position of the top block is opposite to that of the heparin cap, a through hole is formed in the heparin cap for the top block to pass through, and a buckling piece is arranged at the first end and buckled to the hemodialysis catheter. According to the invention, the heparin cap is matched with the lock cylinder, the fastening piece and the like to form fixed connection between the heparin cap and the hemodialysis catheter, so that the heparin cap is not easy to take down by a patient and can only be taken down by a driving object, and potential safety hazards are avoided.

Description

Hemodialysis pipe tip locking structure

Technical Field

The invention relates to the technical field of medical instruments, in particular to a hemodialysis catheter end locking structure.

Background

In patients who are treated by hemodialysis, temporary hemodialysis catheters and long-term hemodialysis catheters are often used for transition or replacement of the function of the internal fistula when the internal fistula is not mature or the internal fistula fails to work and can not improve sufficient blood flow for dialysis. The temporary hemodialysis catheter and the long-term hemodialysis catheter are screwed by threads, dialysis treatment is finished, a heparin cap is usually used for sealing and connecting after the catheters are sealed by heparin, the hemodialysis catheter is wrapped by two layers of sterile gauze, and a patient is taken to leave a hospital after the patient is properly fixed. There have been reports that patients who lack courage in the face of illness open their safety clamp at the Y-hose of the catheter and unscrew the heparin cap themselves at home, resulting in a death event with excessive blood loss. After the patient leaves the hospital, the potential safety hazard exists in the connection problem of heparin cap and hemodialysis pipe, consequently, the dialysis patient takes the pipe safety and the pipe management after leaving the hospital, needs further to strengthen.

Disclosure of Invention

In view of the existing defects in the prior art, the invention provides a hemodialysis catheter end locking structure, which can meet better use effects, and the scheme is as follows:

a hemodialysis catheter end locking structure comprises a hemodialysis catheter and a heparin cap matched with the hemodialysis catheter in a connected mode, wherein a locking strip is arranged on the heparin cap and comprises a first end and a second end which are opposite in position, the locking strip is connected to the heparin cap in a rotatable mode through a hinge point at a position close to the second end, a top block is arranged on the locking strip and located between the hinge point and the end portion of the second end, the position of the top block is opposite to that of the top block, a through hole is formed in the heparin cap and used for the top block to pass through, and a fastening piece is arranged at the first end and fastened to the hemodialysis catheter;

the heparin cap is the tube-shape, the inside axial of heparin cap is provided with the lock core that can screw in or screw out, the axial precession of lock core passes through the via hole, and through the precession of lock core comes to the kicking block passes through the via hole is spacing, the lock core sets special drive article.

Further, still include articulated seat, one end embedding of articulated seat is fixed to the heparin cap, the other end suspension, and this suspended one end is articulated to the locking strip.

Furthermore, the fastener is a matched male and female buckle, and one half of the male and female buckle is arranged in the hemodialysis catheter, and the other half of the male and female buckle is arranged in the locking strip.

Further, the lock core is in threaded fit with the heparin cap.

Furthermore, the lock core is provided with one keyhole of an inner four corner, an inner hexagonal or an inner octagonal, and the driving object is a four corner, hexagonal or octagonal wrench in a matching way.

Has the advantages that: the heparin cap is formed by matching the lock cylinder, the fastening piece and the like on the heparin cap to form fixed connection between the heparin cap and the hemodialysis catheter, so that the heparin cap is not easy to take down by a patient and can only be taken down by a driving object, and potential safety hazards are avoided.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a schematic cross-sectional structural view of an embodiment of the present invention.

Fig. 3 is an enlarged schematic view of a portion a in fig. 2.

FIG. 4 is a schematic structural diagram of a driving object according to an embodiment of the present invention.

Fig. 5 is an enlarged schematic view of a portion B in fig. 3.

Fig. 6 is a schematic structural diagram of a female fastener according to an embodiment of the invention.

Fig. 7 is a schematic cross-sectional view of a female and male fastener in a separated state according to an embodiment of the present invention.

Detailed Description

The invention is further illustrated by the following examples in conjunction with the accompanying drawings:

as shown in fig. 1 to 7, a hemodialysis catheter end locking structure has a hemodialysis catheter 100 and a matching heparin cap 200, and is characterized in that: heparin cap 200 is provided with locking strip 300, and locking strip 300 includes relative first end 310 and second end 320 in position, and locking strip 300 is close to second end 320 department and rotationally connects to heparin cap 200 through the pin joint, is provided with kicking block 330 on locking strip 300, and kicking block 330 is located between the tip of pin joint and second end 320, and with the kicking block 330 position relatively, be provided with through-hole 210 on the heparin cap 200 for kicking block 330 to pass through, and first end 310 is provided with fastener 400 lock joint to hemodialysis pipe 100. The heparin cap 200 is cylindrical, the lock cylinder 500 which can be screwed in or out is axially arranged in the heparin cap 200, the axial precession of the lock cylinder 500 passes through the through hole 210, the top block 330 is limited by the precession of the lock cylinder 500 through the through hole 210, and the lock cylinder 500 is provided with a special driving object 600. In the implementation, it is preferable that the blood dialysis catheter further comprises a hinge base 700, one end of the hinge base 700 is embedded and fixed to the heparin cap 200, the other end is suspended, and the suspended end is hinged to the locking strip 300. in the implementation, preferably, the fastener 400 is a matched male and female fastener, and one half of the male and female fastener is disposed on the blood dialysis catheter 100, and the other half of the male and female fastener is disposed on the locking strip 300. In particular embodiments, lock cylinder 500 is preferably threadably engaged with heparin cap 200. In a specific implementation process, preferably, the key cylinder 500 is provided with one of a key hole with four inner corners, a key hole with a hexagonal shape or a key hole with an octagonal shape, and the driving object 600 is a wrench with four corners, a hexagonal shape or an octagonal shape.

In the above embodiment, in a natural state, the heparin cap 200 is provided with the locking bar 300, which is an independent component. In use, the heparin cap 200 is inserted into the hemodialysis catheter 100, as shown in fig. 2, the locking strip 300 is rotated by the connection of the hinge mount 700, so that the locking strip 300 is rotated to fix the fastener 400 (male and female fastener) at the first end 310 to the hemodialysis catheter 100, and the top block 330 at the second end 320 extends into the through hole 210 based on the lever formed by the locking strip 300. In order to achieve better effect, in the actual design and production process of the product, when the first end 310 is fixedly connected with the fastening piece 400, the top block 330 is flush with the inner wall of the heparin cap 200 towards the surface of the inner side of the heparin cap 200, and then the lock cylinder 500 is rotated, so that the outer wall of the lock cylinder 500 is abutted against the surface of the top block 330 towards the inner side of the heparin cap 200, and the jacking and the limiting are realized. Since the top block 330 at the second end 320 of the locking strip 300 is held by the lock core 500, the locking strip 300 cannot rotate, and the first end 310 of the locking strip 300 is in a snap-fit fixed state by the fastener 400, and the locking strip 300 is connected to the heparin cap 200 and the hemodialysis catheter 100. Therefore, the patient cannot take off the heparin cap without driving the lock cylinder 500 to be separated from the limit state, and safety is guaranteed.

When the heparin cap needs to be opened, the driving object 600 drives the lock cylinder 500 to rotate, so that the lock cylinder 500 is separated from the abutting top block 330, then the second end 320 of the locking strip 300 can move freely, then the second end 320 is pressed, the fastener 400 at the first end 310 is separated, and then the heparin cap 200 can be separated from the hemodialysis catheter 100.

The lock core 500 is matched with the inner wall of the heparin cap 200 through threads to realize corresponding functions. In order to realize the rotation of the lock cylinder 500, one of an inner four corners, an inner hexagonal or an inner octagonal wrench is arranged on the lock cylinder 500, and the lock cylinder 500 is driven to rotate by the aid of the spanner with the four corners, the hexagonal or the octagonal wrench, so that the lock cylinder is convenient to realize and operate. It should be noted that, in real life, the four-corner, hexagonal or octagonal wrench is used as a universal tool, and achieves the universality through unifying the size specification. Therefore, in the specific implementation process of the present scheme, the design and production of the wrench corresponding to the driving object 600 may not adopt a general size specification, and further, the lock cylinder 500 is prevented from being opened by a general wrench which is easy to find.

In practice, as mentioned above, the locking bar 300 functions as a lever, and in reality, a product with a small geometric dimension is obtained by applying the present solution to the hemodialysis catheter 100 (a small enough gap between the locking bar 300 and the heparin cap 200 needs to be ensured to satisfy the compactness of the whole, and also satisfy the functional use of the locking bar 300 as a lever). Therefore, the locking bar 300 as a lever member is pried back and forth in a range with a small spatial dimension, and under the action range, the locking bar 300 is easily interfered by structural deformation and foreign matter attachment; the overall use effect is affected by slight deformation. In this regard, the male and female fastener structure of the fastener 400 may be embodied such that, as shown in fig. 6 and 7, the female fastener 410 forms a concave fastening surface, the fastening surface includes a first contact surface 411 formed in a spherical shape with a convex bottom center, the periphery of the first contact surface 411 is formed as a second contact surface 412 in a concave arc surface, the lower end of the second contact surface 412 is connected to the peripheral edge of the first contact surface 411, and the upper end extends upward. The upper end of the second contact surface 412 forms a platform surface 413, the platform surface 413 is provided with a circular magnet 800, the magnetic connector further comprises a concave arc surface-shaped third contact surface 414, the lower end of the third contact surface 414 is connected to the platform surface 413, and the upper end of the third contact surface 414 is connected to the outer surface of the whole female fastener 410. Accordingly, as shown in fig. 6, the male fastening member 420 of the fastening member 400 forms a contact surface adapted to the overall shape of the first contact surface 411, the second contact surface 412, the third contact surface 414 and the exposed surface of the magnet 800, so as to facilitate the attachment, and the magnet 800 can attract the contact surface to stabilize the connection. In specific implementation, in order to achieve the effects of smooth contact surfaces, being not easy to wear and notch, and being convenient for cleaning off attachments, a TPU (Thermoplastic polyurethane elastomer) film layer is sprayed on the whole formed by the first contact surface 411, the second contact surface 412, the third contact surface 414, and the exposed surface of the magnet 800. Correspondingly, the contact surface of the male fastener 420 is also coated with a layer of TPU (Thermoplastic polyurethane elastomer rubber) film. During the spraying of the film, curing is required to meet the application.

The first contact surface 411, the second contact surface 412, the third contact surface 414 and the magnet 800, on the one hand, increase the contact area by forming a plurality of non-straight surfaces as contact surfaces, and based on the mechanical characteristics of arc surface contact, compared with the straight surfaces, the arc surface has more contact stability, especially a plurality of arc surfaces which are separated from each other and are discontinuous as in the scheme. In addition, the magnet 800 is adopted for adsorption, and the iron ring 421 matched with the magnet 800 is arranged on the male buckle piece 420, so that the stable connection effect of the male buckle and the female buckle is ensured.

Also based on the problem of the small-scale geometric space, in order to ensure the smoothness of the action fit of the components, the instability caused by interference is avoided. The outer edge of the end part of the lock cylinder 500 far away from the hemodialysis catheter 100 is processed by a fillet to form a first arc surface 510, and the first arc surface 510 is an elliptical arc instead of a circular arc, and the elliptical arc is adopted to have a more applicable length-width ratio. Suitably, the inner wall of the top block 330 and the edge near one side of the hemodialysis catheter 100 form a slope 331, the slope 331 and the inner wall of the top block 330 are transited by a second arc surface 332, and the second arc surface 332 is also an elliptical arc, not a circular arc. When the lock core 500 moves along the axial direction of the heparin cap 200, the first arc surface 510 and the second arc surface 332 are matched, so that the contact and the relative movement are smooth enough, and the phenomenon that the common right-angle structure is easy to displace due to deformation and further cause interference is avoided. In this embodiment, small displacements of the top block 330 may interfere, and the entire structure may not be used. By adopting the elliptical arc processing mode, the use risk is avoided, and the gradual scale of the elliptical arc is more gentle relative to the circular arc.

The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.

Claims

1. The utility model provides a hemodialysis pipe tip locking structure, includes hemodialysis pipe (100) and connects supporting heparin cap (200), its characterized in that: the heparin cap (200) is provided with a locking strip (300), the locking strip (300) comprises a first end (310) and a second end (320) which are opposite in position, said locking bar (300) being rotatably connected to said heparin cap (200) near said second end (320) by a hinge point, a top block (330) is arranged on the locking bar (300), the top block (330) is positioned between the hinged point and the end part of the second end (320), the heparin cap (200) is provided with a through hole (210) opposite to the top block (330) for the top block (330) to pass through, the first end (310) is provided with a fastener (400) which is fastened to the hemodialysis catheter (100), when the fastener (400) is fastened to the hemodialysis catheter (100), the surface of the top block (330) facing the inner side of the heparin cap (200) is flush with the inner wall of the heparin cap (200);

heparin cap (200) are the tube-shape, the inside axial of heparin cap (200) is provided with lock core (500) that can screw in or screw out, the axial precession of lock core (500) passes through via hole (210), and through the precession of lock core (500) comes to pass through kicking block (330) spacing is carried out through via hole (210), lock core (500) set dedicated drive article (600).

2. The hemodialysis catheter end closure structure of claim 1, wherein: the heparin cap further comprises a hinge base (700), one end of the hinge base (700) is embedded and fixed to the heparin cap (200), the other end of the hinge base is suspended, and one end of the suspension is hinged to the locking strip (300).

3. The hemodialysis catheter end locking structure of claim 2, wherein: the fastener (400) is a matched male and female fastener, and half of the male and female fastener is arranged on the hemodialysis catheter (100), and the other half of the male and female fastener is arranged on the locking strip (300).

4. The hemodialysis catheter end closure structure of claim 1, wherein: the lock core (500) is in threaded fit with the heparin cap (200).

5. The hemodialysis catheter end closure structure of claim 1, wherein: the lock core (500) is provided with one of key holes with four inner corners, a hexagon socket or an octagon socket, and the driving object (600) is a wrench with four corners, a hexagon socket or an octagon socket in a matching way.