CN219271762U

CN219271762U - Safety transfusion port

Info

Publication number: CN219271762U
Application number: CN202222802376.7U
Authority: CN
Inventors: 聂长宁; 王晶晶; 钱俊豪
Original assignee: Suzhou Linhwa Medical Devices Co ltd
Current assignee: Suzhou Linhwa Medical Devices Co ltd
Priority date: 2022-10-24
Filing date: 2022-10-24
Publication date: 2023-06-30
Anticipated expiration: 2032-10-24

Abstract

The utility model discloses a safe transfusion port, which comprises a port seat, wherein a liquid storage cavity is arranged in the port seat, an injection seat is arranged at the top of the liquid storage cavity, the injection seat is fixed with the port seat, the upper surface of the injection seat is provided with a convex cambered surface which protrudes upwards, and the lower surface of the injection seat is recessed upwards. The bending point extrusion needle way of no damage needle is avoided to this scheme, leads to the liquid medicine to ooze, improves the sealing performance of transfusion harbor, and transfusion harbor assembly is inseparable difficult to explode, and compressive property, security are strong, and the accurate position of injection seat is confirmed to the medical personnel of being convenient for simultaneously.

Description

Safety transfusion port

Technical Field

The utility model relates to the field of medical equipment, in particular to a safe transfusion port.

Background

The transfusion port is a fully implanted transfusion drug delivery system which is embedded in human body, also called an implanted drug delivery device. The system comprises a central venous catheter, the end of which is connected with a device called an injection seat, and the whole device is completely embedded in the body; has the characteristics of long retention time, less complications and the like. The tip of the catheter is positioned in the superior vena cava, so that the concentration of the drug can be rapidly diluted, the stimulation and damage to the wall of the blood vessel can be avoided, the daily life of a patient can be unrestricted after the infusion port is implanted, the drug is convenient and easy to accept, and the quality of life is greatly improved.

In practical clinic, the atraumatic needle is required to be matched with an infusion port for use, the atraumatic needle penetrates into an injection seat, a needle channel is formed in the injection seat, the atraumatic needle penetrates through the needle channel to input liquid medicine into the subcutaneous infusion port of a patient, the infusion port is used for inputting the liquid medicine into the body of the patient, a bending section is generally arranged at the needle head of the atraumatic needle, in order to ensure the minimum thickness of the injection seat, the pressure resistance of the injection seat is realized, the lower surface of the existing injection seat is generally a cambered surface or a plane protruding downwards, the distance between the injection seat and the infusion port is relatively short, the bending point of the bending section of the atraumatic needle is generally positioned in the needle channel, the inclined surface angle of the bending section extrudes the needle channel of the injection seat, the pressure resistance is reduced, and the problem of leakage along the needle channel occurs when the contrast agent is infused under high pressure.

In addition, the injection seat is generally made of a silica gel material with a certain elasticity, so that the injection seat is generally required to be compressed when the injection seat is assembled, however, if the injection seat and the port seat are not tightly assembled, the compression resistance of the injection port is poor, the injection seat is easy to burst, and the safety performance is poor.

Meanwhile, in order to facilitate assembly, in the prior art, a port seat and a liquid storage cavity of the transfusion port are combined in a split type structure, and are bonded into a whole by ultrasonic welding or glue.

Disclosure of Invention

Therefore, in order to solve the above problems, the present utility model provides a safe transfusion port.

The utility model is realized by the following technical scheme:

the safe transfusion port comprises a port seat, a liquid storage cavity is arranged in the port seat, an injection seat is arranged at the top of the liquid storage cavity, the injection seat is fixed with the port seat, an upward-protruding convex cambered surface is arranged on the upper surface of the injection seat, and the lower surface of the injection seat is recessed upward.

Preferably, the lower surface of the injection seat is a concave cambered surface which is concave upwards, and the concave cambered surface is coaxial with the convex cambered surface.

Preferably, a circle of annular mounting groove is coaxially arranged on the periphery of the convex cambered surface on the upper surface of the injection seat, a circle of convex first limiting part is coaxially arranged on the periphery of the annular mounting groove, and the height of the first limiting part is lower than that of the convex cambered surface.

Preferably, the port seat is provided with a positioning block at the top of the liquid storage cavity in an inward protruding manner along the radial direction of the liquid storage cavity, and the edge of the bottom of the injection seat is abutted with the positioning block.

Preferably, the top of the port seat is bent and embedded into the mounting groove.

Preferably, the liquid storage cavity is a titanium alloy liquid storage cavity.

Preferably, the liquid storage cavity and the port seat are integrally injection molded.

Preferably, the liquid storage cavity is a round groove with an open top, and the outer edge of the opening of the liquid storage cavity is bent towards the periphery of the liquid storage cavity and stretches into the port seat.

Preferably, a liquid outlet is formed in one side of the liquid storage cavity, the liquid outlet is connected with a guide pipe, the guide pipe extends from the liquid outlet to the outside of the port seat, a guide pipe lock is arranged on the periphery of the guide pipe, a mounting hole for the guide pipe to pass through is formed in the port seat, and the guide pipe lock is clamped with the mounting hole.

Preferably, the injection seat is a silica gel injection seat, the diameter of a puncture window of the injection seat is 10mm, the hardness of a silica gel material is 50A, and the pressure resistance requirement is 350psi.

The technical scheme of the utility model has the beneficial effects that:

1. the lower surface of injection seat upwards caves in, forms for the bending section of atraumatic needle and dodges the space to ensure under the infusion state, the bending section of atraumatic needle is submerged into the stock solution intracavity completely, avoids the bending point extrusion needle way of atraumatic needle, leads to the liquid medicine exudation, improves the sealing performance of transfusion harbor.

2. The upper surface of the injection seat is a convex cambered surface which protrudes upwards, so that the injection seat can reach the minimum thickness by being matched with the lower surface, and the compression resistance is ensured; on the other hand, the injection seat is difficult to find after being injected subcutaneously, and the upper surface of the injection seat is upwards convex, so that medical staff can conveniently determine the accurate position of the injection seat, and puncture transfusion is facilitated.

3. The port seat and the liquid storage cavity of the transfusion port are integrally injection molded, the liquid storage cavity is made of titanium alloy which is light in material and high in hardness, the liquid storage cavity is tightly combined, the liquid storage cavity is not easy to puncture by a nondestructive needle, liquid in the liquid storage cavity cannot leak, meanwhile, the top of the transfusion port is pressed and embedded into the mounting groove on the upper surface of the injection port, the bottom of the injection port is abutted to the limiting block arranged in the transfusion port, the firmness of assembling the injection port and the port seat is ensured, the transfusion port is not easy to explode, and the compression resistance and the safety are high.

Drawings

Fig. 1: is a schematic diagram of the state of the atraumatic needle penetrating into the transfusion port;

fig. 2: is a schematic diagram when the injection seat is not placed in the port seat;

fig. 3: is a schematic diagram of the injection seat when not assembled in the port seat;

fig. 4: is a structural schematic diagram of the safety transfusion port after the assembly is completed;

fig. 5: is a schematic structure of the liquid storage cavity.

Detailed Description

So that the objects, advantages and features of the present utility model can be more clearly and specifically set forth, a more particular description of the preferred embodiments will be rendered by the following non-limiting description thereof. The embodiment is only a typical example of the technical scheme of the utility model, and all technical schemes formed by adopting equivalent substitution or equivalent transformation fall within the scope of the utility model.

It is also stated that, in the description of the aspects, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "front", "rear", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of description and simplification of description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like in this description are used for descriptive purposes only and are not to be construed as indicating or implying a ranking of importance, or as implicitly indicating the number of technical features shown. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the present utility model, the meaning of "plurality" means two or more, unless specifically defined otherwise.

The utility model discloses a safe transfusion port, as shown in fig. 1-4, which comprises a port seat 1, wherein a liquid storage cavity 2 is arranged in the port seat 1, an injection seat 3 is arranged at the top of the liquid storage cavity 2, the injection seat 3 is fixed with the port seat 1, the upper surface of the injection seat 3 is provided with an upward convex cambered surface 301, the lower surface 302 of the injection seat is recessed upward, specifically, the top of the port seat 1 is provided with a puncture window, and the convex cambered surface 301 of the upper surface of the injection seat 3 is arranged on the outer surface of the transfusion port in a protruding way from the puncture window.

In an embodiment, the lower surface 302 of the injection seat is provided with an upward concave avoidance groove, the shape of the outer periphery of the avoidance groove corresponds to the shape and the position of the puncture window, and in this embodiment, the outer periphery of the puncture window is circular, so that the avoidance groove can be cylindrical, the height of the avoidance groove is equal to the height difference between the highest point of the convex cambered surface 301 and the lowest point of the convex cambered surface 301, thereby ensuring that the injection seat 3 reaches the minimum thickness, ensuring the compression resistance of the injection seat 3, simultaneously, the avoidance groove is arranged at the bottom of the injection seat 3, a section of avoidance space can be increased between the injection seat 3 and the liquid storage cavity 2, increasing the height between the bottom of the injection seat 3 and the bottom of the liquid storage cavity, so that after the nondestructive needle 6 penetrates into the liquid storage cavity 2, the bending section 601 of the puncture needle is completely submerged in the liquid storage cavity, the bending point 602 of the nondestructive needle 6 is prevented from extruding the needle channel, the liquid medicine is prevented from exuding, and the sealing performance of the port is improved.

In a preferred embodiment, the lower surface of the injection seat 3 is a concave arc surface which is concave upwards, the concave arc surface is coaxial with the convex arc surface 301, the distance between the highest point of the concave arc surface and the lowest point of the concave arc surface is equal to the distance between the highest point of the convex arc surface 301 and the lowest point of the convex arc surface 301, and the minimum thickness of the injection seat 3 is ensured.

The port seat 1 is provided with a positioning block 101 protruding inwards along the radial direction of the liquid storage cavity 2 at the top of the liquid storage cavity 2, and the edge of the bottom of the injection seat 3 is abutted to the positioning block 101, so that the injection seat 3 is fixed right above the liquid storage cavity 2.

As shown in fig. 1-4, a circle of annular mounting groove 303 is coaxially disposed on the outer periphery of the convex arc surface 301 on the upper surface of the injection seat 3, a circle of protruding first limit portion 304 is coaxially disposed on the outer periphery of the annular mounting groove 303, the height of the first limit portion 304 is lower than that of the convex arc surface 301, the top of the port seat 1 is bent and embedded into the mounting groove 303, specifically, after the injection molding of the port seat 1 and the liquid storage cavity 2 is completed, the diameter of the opening at the top of the port seat 1 is equal to the whole diameter of the injection seat 3 before the injection seat 3 is assembled, after the injection seat 3 is placed in the port seat 1 and the bottom of the injection seat 3 is abutted against the positioning block 101, a section of outer wall higher than that of the injection seat 3 is further disposed on the outer periphery of the injection seat 3, after the position of the injection seat 3 is determined, the section of outer wall higher than that of the injection seat 3 is bent and embedded into the mounting groove 303 on the upper surface of the injection seat 3, and after the press-fitting is completed, the bending portion 304 of the outer wall is wrapped at the first periphery, the outer wall is made to closely match with the compression-resistant seal of the injection seat 3.

The injection seat 3 is a silica gel injection seat 3, the diameter of a puncture window of the injection seat 3 is 10mm, the hardness of a silica gel material is 50A, and the pressure resistance requirement is 350psi.

As shown in fig. 4 and 5, the liquid storage cavity 2 is a titanium alloy liquid storage cavity 2, the titanium alloy has the characteristics of light texture and higher hardness, and can prevent the damage-free needle 6 from damaging the liquid storage cavity 2 due to overlarge puncture force when penetrating into the liquid storage cavity 2 and contacting the bottom of the liquid storage cavity 2, so that liquid medicine in the liquid storage cavity 2 is leaked, meanwhile, the liquid storage cavity 2 and the port seat 1 are integrally injection molded, and compared with a splicing structure, the compression resistance and the liquid leakage resistance of the integrally injection molded transfusion port structure are higher, the safety performance is good, the liquid storage cavity 2 is a circular groove with an open top, the outer edge of the opening of the liquid storage cavity 2 is bent towards the periphery of the liquid storage cavity 2, and in the injection molding process of the port seat 1, the bent part of the periphery of the liquid storage cavity 2 stretches into the port seat 1, so that the tightness and the firmness of the assembly between the liquid storage cavity 2 and the port seat 1 are further increased.

One side of liquid storage cavity 2 is provided with out liquid hole 201, go out liquid hole 201 and connect pipe 4, pipe 4 extends to from going out liquid hole 201 port seat 1 is outside, pipe 4 periphery is provided with pipe lock 5, be provided with in port seat 1 and be used for pipe 4 passes through the mounting hole, pipe lock 5 with the mounting hole joint, specifically, the periphery of pipe lock 5 is provided with first joint section and second joint section respectively, be provided with in the mounting hole respectively with first joint section matched with first spacing hole and with second joint section matched with second spacing hole, ensure that pipe 4 is fixed in port seat 1 steadily, and the entrance of pipe 4 with the liquid outlet of liquid storage cavity 2 aligns.

The utility model has various embodiments, and all technical schemes formed by equivalent transformation or equivalent transformation fall within the protection scope of the utility model.

Claims

1. Safe type transfusion harbor, its characterized in that: the injection device comprises a port seat, a liquid storage cavity is arranged in the port seat, an injection seat is arranged at the top of the liquid storage cavity, the injection seat is fixed with the port seat, an upward-protruding convex cambered surface is arranged on the upper surface of the injection seat, and the lower surface of the injection seat is recessed upward.

2. The safety type transfusion harbor of claim 1, wherein: the lower surface of the injection seat is a concave cambered surface which is concave upwards, and the concave cambered surface is coaxial with the convex cambered surface.

3. The safety type transfusion harbor of claim 1, wherein: the outer periphery of the convex cambered surface on the upper surface of the injection seat is coaxially provided with a circle of annular mounting groove, the outer periphery of the annular mounting groove is coaxially provided with a circle of convex first limiting part, and the height of the first limiting part is lower than that of the convex cambered surface.

4. The safety type transfusion harbor of claim 2, wherein: the port seat is provided with a positioning block in the top of the liquid storage cavity in an inward protruding mode along the radial direction of the liquid storage cavity, and the edge of the bottom of the injection seat is abutted to the positioning block.

5. The safety port of claim 3, wherein: the top of the port seat is bent and embedded into the mounting groove.

6. The safety type transfusion harbor of claim 1, wherein: the liquid storage cavity is a titanium alloy liquid storage cavity.

7. The safety type transfusion harbor of claim 1, wherein: the liquid storage cavity and the port seat are integrally injection molded.

8. The safety type transfusion harbor of claim 6, wherein: the liquid storage cavity is of a round groove shape with an opening at the top, and the outer edge of the opening of the liquid storage cavity is bent towards the periphery of the liquid storage cavity and stretches into the port seat.

9. The safety type transfusion harbor of claim 1, wherein: one side of liquid storage cavity is provided with out the liquid hole, go out liquid hole connection pipe, the pipe is from going out liquid hole extension to it is outside to harbor the seat, the pipe periphery is provided with the pipe lock, be provided with in the harbor seat and be used for the mounting hole that the pipe passed through, the pipe lock with the mounting hole joint.

10. The safety type transfusion harbor of claim 1, wherein: the injection seat is a silica gel injection seat, the diameter of a puncture window of the injection seat is 10mm, the hardness of a silica gel material is 50A, and the pressure resistance requirement is 350psi.