CN116212156A

CN116212156A - Implanted transfusion port

Info

Publication number: CN116212156A
Application number: CN202310248209.9A
Authority: CN
Inventors: 戴新春
Original assignee: Jiangsu Yibei Medical Technology Co ltd
Current assignee: Jiangsu Yibei Medical Technology Co ltd
Priority date: 2023-03-15
Filing date: 2023-03-15
Publication date: 2023-06-06
Anticipated expiration: 2043-03-15
Also published as: CN116212156B

Abstract

The invention relates to an implantable transfusion port, which comprises a port seat and a catheter, wherein the catheter is connected to the port seat, the catheter comprises an outer tube and an inner tube, the inner tube is positioned in the outer tube, a deformation ring is arranged between the outer tube and the inner tube and penetrates through the outer portion of the inner tube, the deformation ring is made of memory alloy, the catheter has an open state and a closed state, when the catheter is in the open state, the deformation ring is in a flat state so as to enable the inner tube to be closed, and when the catheter is in the open state, the deformation ring is in a stretching state so as to enable the inner tube to be opened. The invention can be automatically opened when in transfusion and automatically closed when not in transfusion, thus effectively avoiding thrombosis, being not easy to cause tube blockage and being not easy to cause embolism so as to aggravate the illness state of patients; the device is convenient to use, does not need frequent flushing for maintenance, and has longer service life.

Description

Implanted transfusion port

Technical Field

The invention relates to the technical field of infusion devices, in particular to an implantable infusion port.

Background

The transfusion port is also called an artificial blood vessel, is a transfusion device which can be implanted into the skin and is reserved in the body for a long time, and can perform treatments such as drug infusion, fluid infusion, nutrition support, blood transfusion and the like. The port is generally composed of a port seat implanted under the skin, which is a device for receiving the injection of a drug, and a catheter penetrating into a blood vessel, which is a flexible tube for guiding the drug injected into the port seat to a desired portion of a patient. The transfusion port is adopted for transfusion, so that the pain of repeated puncture blood vessel injection can be avoided, and the transfusion port is particularly suitable for patients needing long-term injection treatment.

Because the catheter of the infusion tube is in the blood vessel for a long time, when the existing catheter is not infused, blood is easy to enter the catheter, part of blood can solidify on the inner wall of the catheter to form thrombus, the phenomenon of tube blockage is easy to occur in the long-term use process, the service life of the catheter is ensured, the catheter needs to be frequently flushed, but once the formed thrombus is flushed down in the flushing or infusion process, the fallen thrombus can enter the pulmonary circulation or the cardiac circulation and the like along with the backflow of the blood in the blood vessel to cause embolism complications, the pain of a patient can be increased, even the life of the patient is threatened, and the safety risk of the patient is increased.

Disclosure of Invention

Therefore, the invention aims to solve the technical problems that the catheter structure of the transfusion port in the prior art is easy to generate thrombus phenomenon, so that the catheter is inconvenient to use and the safety risk of a patient is increased.

In order to solve the technical problems, the invention provides an implantable transfusion port, which comprises a port seat and a catheter, wherein the catheter is connected to the port seat, and the implantable transfusion port is characterized in that: the catheter comprises an outer tube and an inner tube, wherein the inner tube is positioned inside the outer tube, a deformation ring is arranged between the outer tube and the inner tube, the deformation ring penetrates through the outer portion of the inner tube and is made of memory alloy, the catheter is in an open state and a closed state, when the catheter is in the open state, the deformation ring is in a flat state so that the inner tube is closed, and when the catheter is in the open state, the deformation ring is in a stretching state so that the inner tube is opened.

In one embodiment of the invention, a first diversion trench is arranged on the outer wall of the outer tube, extends along the axial direction of the outer tube, and is V-shaped.

In one embodiment of the present invention, a plurality of developing rings are connected to the outer wall of the outer tube, and the plurality of developing rings are arranged at equal intervals in the axial direction of the outer tube.

In one embodiment of the invention, the outer wall of the outer tube is also connected with positioning components, each positioning component comprises a plurality of elastic bulges, and the elastic bulges are circumferentially and uniformly distributed on the outer tube.

In one embodiment of the present invention, the elastic protrusion includes an arc portion, a middle portion of the arc portion is connected to the outer tube through a support portion, and a width of the support portion is smaller than a width of the arc portion.

In one embodiment of the invention, at least two of the positioning assemblies are arranged in sequence along the axial direction of the outer tube.

In one embodiment of the invention, the deformation ring comprises a plurality of monomer rings which are connected in sequence, one end of each monomer ring is provided with a conical protrusion, the other end of each monomer ring is provided with a conical groove, and the conical protrusion on one monomer ring of two adjacent monomer rings is inserted into the conical groove of the adjacent monomer ring.

In one embodiment of the present invention, a plurality of the deformation rings are sequentially connected to the inner tube in the axial direction of the inner tube.

In one embodiment of the invention, heat preservation strips are adhered to the inner tube between two adjacent deformation rings, and the heat preservation strips are spirally wound on the outer wall of the inner tube.

In one embodiment of the present invention, an expansion membrane is connected to the outer tube, a plurality of penetrating holes are provided on the expansion membrane, a through hole is provided on the outer tube, the through hole extends from the outer tube to the inner tube, the expansion membrane has a first state and a second state, when the expansion membrane is in the first state, the expansion membrane expands to a spherical shape, and when the expansion membrane is in the second state, the expansion membrane contracts and is attached to the outer wall of the outer tube.

Compared with the prior art, the technical scheme of the invention has the following advantages:

the implanted transfusion port can be automatically opened during transfusion and automatically closed when not in transfusion, so that thrombus formation can be effectively avoided, a tube blockage phenomenon is not easy to occur, and an embolism phenomenon is not easy to be caused to aggravate the illness state of a patient; the device is convenient to use, does not need frequent flushing for maintenance, and has longer service life.

Drawings

In order that the invention may be more readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof that are illustrated in the appended drawings.

FIG. 1 is a schematic view showing the overall structure of an implantable port according to the present invention;

FIG. 2 is a schematic view of the catheter of FIG. 1 in a closed configuration;

FIG. 3 is a cross-sectional view of the catheter of FIG. 2 at A-A;

FIG. 4 is a schematic view of the catheter of FIG. 3 in an open position, shown at A-A;

FIG. 5 is a schematic view of the state of the deformation ring of FIG. 4;

FIG. 6 is a schematic view of the catheter of FIG. 3 in an open position, shown at A-A;

FIG. 7 is a schematic view of the state of the deformation ring of FIG. 6;

FIG. 8 is a schematic view of the assembly of the inner tube and the deformation ring of the present invention;

FIG. 9 is an exploded view of one construction of the deformation ring of the present invention;

FIG. 10 is a schematic view of another construction of the catheter of FIG. 1;

FIG. 11 is a schematic view of another construction of the outer tube in the catheter of the present invention;

FIG. 12 is an end view of the outer tube of FIG. 11;

FIG. 13 is an enlarged partial schematic view at M in FIG. 12;

a groove; 212. a developing ring; 213. a positioning assembly; 2131. an elastic protrusion; 21311. an arc-shaped portion; 21312. a support part; 214. an inflation film; 215. a through hole; 22. an inner tube; 23. a deformation ring; 231. a monomer ring; 2311. a conical protrusion; 2312. a conical groove; 24. and (5) heat preservation strips.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and specific examples, which are not intended to be limiting, so that those skilled in the art will better understand the invention and practice it.

In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the 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 invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.

Referring to fig. 1, the present embodiment discloses an implantable transfusion port, comprising a port 1 and a catheter 2, wherein the catheter 2 is connected to the port 1, and the port 1 and the catheter 2 are communicated with each other, and the port 1 is a device for being implanted subcutaneously to directly receive drug injection, for example, the port 1 can be implanted in a subcutaneous collarbone position; the catheter 2 is used for penetrating into a blood vessel to guide the medicine injected into the injection seat to a hose of a required part of a patient, and when the medicine is injected, the medicine liquid can be introduced into the port seat 1 only by using the injection needle to puncture a puncture membrane on the port seat 1, so that the medicine liquid is input into the catheter 2 through the port seat 1, and the medicine liquid is conveyed into the blood vessel in a human body through the catheter 2.

As shown in fig. 2-4, the catheter 2 includes an outer tube 21 and an inner tube 22, the inner tube 22 is located inside the outer tube 21, the inner tube 22 is an infusion channel, a deformation ring 23 is disposed between the outer tube 21 and the inner tube 22, the deformation ring 23 is penetratingly disposed outside the inner tube 22, the deformation ring 23 is made of a memory alloy, the catheter 2 has an open state and a closed state, when the catheter 2 is in the open state, the deformation ring 23 is in a flat state so as to seal the inner tube 22, and when the catheter 2 is in the open state, the deformation ring 23 is in a spread state so as to open the inner tube 22.

When transfusion is carried out, the liquid medicine enters the inner tube 22 in the catheter 2, so that the deformation ring 23 is gradually opened to enable the deformation ring to be in an opened state, the catheter 2 is in an opened state, the inner tube 22 is opened, the liquid medicine is directly input into a blood vessel through the inner tube 22, and is conveyed to all parts of a human body through blood in the blood vessel;

it will be appreciated that when the catheter 2 is in the open state, the shape may be elliptical or circular, the specific shape depends on the amount of the liquid medicine and the impact force of the liquid medicine on the inner tube 22, when the acting force of the liquid medicine on the tube wall of the inner tube 22 is not large, the inner tube 22 presents an ellipse as shown in fig. 4, at this time, the deformation ring 23 also presents an ellipse as shown in fig. 5, and the whole catheter 2 also presents an ellipse; when the liquid medicine generates enough force on the pipe wall of the inner pipe 22, the inner pipe 22 can be spread to form a circular shape as shown in fig. 6, and the deformation ring 23 is also in a circular shape as shown in fig. 7, so that the whole catheter 2 is also in a circular state.

After transfusion is finished, the deformation ring 23 is not subjected to the acting force of the liquid medicine, so that the whole catheter 2 is driven to be in a flat state, the walls of the inner tube 22 are attached together, the inner tube 22 is closed, blood cannot enter the inner tube 22, and thrombus is avoided.

In addition, the catheter 2 adopts a double-layer structure of the inner tube 22 and the outer tube 21, so that the deformation ring 23 can be protected, and meanwhile, the outer tube 21 can also protect the blood vessel wall, so that the deformation ring 23 is prevented from directly contacting the blood vessel wall to damage the blood vessel wall.

The catheter structure can be automatically opened during transfusion and automatically closed during non-transfusion, so that thrombus is effectively avoided, the phenomenon of blockage of a catheter and embolism is not easy to occur, meanwhile, the time and the use cost consumed by frequent flushing and maintenance are also avoided, the use convenience of the catheter 2 is greatly improved, the service life of the catheter 2 is also prolonged, and convenience is provided for patients without frequent maintenance of the catheter in hospitals.

In one embodiment, both the outer tube 21 and the inner tube 22 may be made of TPU (Thermoplastic polyurethanes, thermoplastic polyurethane elastomer rubber) materials having high tensile, strength and aging resistance properties; or silica gel.

In one embodiment, as shown in fig. 2 and 11, a first diversion trench 211 is provided on the outer wall of the outer tube 21, the first diversion trench 211 extends along the axial direction of the outer tube 21, and the first diversion trench 211 is V-shaped.

Further, the first guide groove 211 may extend from one end to the other end of the outer tube 21.

The first flow guide groove 211 is provided so that even when the outer tube 21 is in contact with the inner wall of the blood vessel, blood can normally flow outside the outer tube 21 via the first flow guide groove 211; the first diversion trench 211 is V-shaped, so that the diversion effect can be effectively improved, and the smoothness of diversion is ensured.

In one embodiment, a plurality of developing rings 212 are connected to the outer wall of the outer tube 21, and the plurality of developing rings 212 are equally spaced in the axial direction of the outer tube 21 to serve as a position identification function.

Wherein the developing ring 212 is made of a developing material, and the developing ring 212 can be developed under X-rays, so as to show the position of the catheter 2 in the body, and barium sulfate can be used as the developing material. Specifically, one developing ring 212 may be formed by brushing a ring of developing material on the outer tube 21.

The developing rings 212 play a role in position identification, and the positions of different positions of the catheter 2 in the body can be accurately known through the arrangement of the plurality of developing rings 212; and the catheter 2 is also beneficial to accurately knowing the position of the catheter 2 through an external image when the catheter 2 is sent into a human body so as to ensure smooth implantation.

In one embodiment, as shown in fig. 11-12, the outer wall of the outer tube 21 is further connected with positioning assemblies 213, each positioning assembly 213 includes a plurality of elastic protrusions 2131, and the plurality of elastic protrusions 2131 are circumferentially and uniformly distributed on the outer tube 21, so that the plurality of elastic protrusions 2131 enclose a circular structure. By the provision of the plurality of elastic protrusions 2131 provided circumferentially, the catheter 2 can be positioned such that the catheter 2 is located substantially at the axis of the blood vessel, and the outer wall of the outer tube 21 is not in contact with the wall of the blood vessel, so that the normal flow of blood outside the catheter 2 is ensured.

In particular use, the elastic protrusions 2131 of the positioning assembly 213 contact the vessel wall, and because they are elastic, they can automatically adapt to the shape of the vessel wall without damaging the vessel wall.

In one embodiment, a positioning assembly 213 may be disposed between two adjacent developer rings 212.

In one embodiment, as shown in fig. 13, the elastic protrusion 2131 includes an arc portion 21311, the middle portion of the arc portion 21311 is connected to the outer tube 21 through a supporting portion 21312, and the width H2 of the supporting portion 21312 is smaller than the width H1 of the arc portion 21311, so that the elastic protrusion 2131 is substantially T-shaped, which is more beneficial for the arc portion 21311 to deform to a greater extent; in addition, the provision of the arcuate portions 21311 is also more conducive to adapting to the shape of the vessel wall.

Further, at least three elastic protrusions 2131 may be provided in each positioning assembly 213 to better ensure positioning accuracy.

In one embodiment, at least two positioning assemblies 213 are provided in sequence along the axial direction of the outer tube 21 to ensure positioning reliability of the entire catheter 2.

In one embodiment, as shown in fig. 9, the deformation ring 23 includes a plurality of monomer rings 231 connected in sequence, one end of each monomer ring 231 is provided with a tapered protrusion 2311, the other end is provided with a tapered slot 2312, and the tapered protrusion 2311 on one monomer ring 231 of two adjacent monomer rings 231 is inserted into the tapered slot 2312 of the adjacent monomer ring 231. The structure ensures that the deformation ring 23 is formed by assembling a plurality of single rings 231, thereby flexibly adjusting the whole length of the deformation ring 23 according to actual requirements and avoiding the increase of processing difficulty caused by directly processing the deformation ring 23 with a longer single length;

in addition, by adopting the plugging manner of the tapered protrusions 2311 and the tapered grooves 2312, not only the connection reliability of the adjacent monomer rings 231 can be effectively increased, but also the assembly accuracy of the two can be effectively ensured.

In one embodiment, as shown in fig. 8, a plurality of deformation rings 23 are sequentially connected to the inner tube 22 in the axial direction of the inner tube 22. The arrangement can better ensure the opening and closing of the whole catheter 2 due to the longer length of the catheter 2; and meanwhile, the problems of material waste and high processing difficulty caused by the fact that only one deformation ring 23 with the same length as the catheter 2 is arranged on the catheter 2 are avoided.

In one embodiment, as shown in fig. 8, heat-insulating strips 24 are adhered to the inner tube 22 between two adjacent deformation rings 23, and the heat-insulating strips 24 are spirally wound on the outer wall of the inner tube 22.

The heat preservation strips 24 can maintain the liquid medicine in the inner tube 22 at a certain temperature, so as to avoid the uncomfortable feeling of the human body caused by the cooling of the liquid medicine;

in addition, the heat preservation strip 24 is spirally wound on the outer wall of the inner pipe 22, so that on one hand, the heat preservation uniformity of the guide pipe 2 can be ensured, and on the other hand, the heat preservation material can be saved.

The heat-insulating strip 24 can be made of heat-insulating materials such as nano silicon oxide; the nano silicon oxide has the advantages of no toxicity, no smell, no pollution and good heat preservation performance.

In one embodiment, as shown in fig. 10, an expansion membrane 214 may be further connected to the outer tube 21, a plurality of penetration holes (not shown in the drawings) are provided in the expansion membrane 214 to penetrate the medical fluid into the blood vessel, a through hole 215 is provided in the outer tube 21, the through hole 215 extends from the outer tube 21 to the inner tube 22, the expansion membrane 214 has a first state and a second state, the expansion membrane 214 expands into a spherical shape when the expansion membrane 214 is in the first state, and the expansion membrane 214 contracts and adheres to the outer wall of the outer tube 21 when the expansion membrane 214 is in the second state.

The catheter 2 with the inflation film 214 is used as follows:

when in transfusion, the liquid medicine in the inner tube 22 reaches the outer tube 21 through the through holes 215 and enters the inner cavity of the expansion membrane 214, and the expansion membrane 214 gradually expands to reach the first state along with the increase of the liquid medicine, and meanwhile, the liquid medicine in the inner cavity of the expansion membrane 214 also enters the external blood vessel through each penetration hole;

when the expansion membrane 214 expands, each penetration hole is arranged in a spherical surface, so that the directions of the penetration holes are different, thereby realizing multi-directional penetration transfusion and enhancing the diffusion effect of the liquid medicine;

after the transfusion is finished, the expansion membrane 214 is reset and is attached to the outer tube 21 again due to the loss of the impact force of the liquid medicine, so that the blood at the periphery of the outer tube 21 is prevented from entering the catheter 2;

the design of the expansion membrane 214 can play a role in diversion, so that part of the liquid medicine is directly input into the blood vessel through the inner tube 22, and the other part of the liquid medicine permeates into the blood vessel from each permeation hole of the expansion membrane 214, so that the liquid medicine is released from multiple directions, and the transfusion effect is enhanced; furthermore, when the outlet end of the inner tube 22 is blocked, the drug solution may also leak out from the swelling membrane 214, thereby providing a standby function.

Further, the expansion membrane 214 may be disposed near the liquid outlet of the catheter 2, for example, at one end of the outer tube 21, so as to facilitate liquid discharge.

The size of the penetration holes is not excessively large, so long as the smooth exudation of the liquid medicine is ensured, the specific size can be set according to actual needs, the number of the penetration holes can be set according to needs, and the penetration holes are not limited.

When the implanted port 1 is used, the injection needle pierces the port seat 1, so that the medical liquid enters the inner tube 22 of the catheter 2 through the port seat 1, the inner tube 22 is spread, the medical liquid enters the internal blood vessel through the inner tube 22, the deformation ring 23 is changed from a flat state to a spread state, and after the transfusion is finished, the deformation ring 23 is reset to a flat state, so that the inner tube 22 is closed.

The implanted transfusion port of the embodiment can effectively avoid thrombosis, is not easy to cause tube blockage and embolism, and aggravates the illness state of patients; the use is convenient, the maintenance is carried out without frequent flushing, and the service life is long; the transfusion port is especially suitable for tumor patients needing long-term transfusion.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations and modifications of the present invention will be apparent to those of ordinary skill in the art in light of the foregoing description. It is not necessary here nor is it exhaustive of all embodiments. And obvious variations or modifications thereof are contemplated as falling within the scope of the present invention.

Claims

1. An implantable port for infusion comprising a port hub and a catheter, said catheter being attached to said port hub, characterized in that: the catheter comprises an outer tube and an inner tube, wherein the inner tube is positioned inside the outer tube, a deformation ring is arranged between the outer tube and the inner tube, the deformation ring penetrates through the outer portion of the inner tube and is made of memory alloy, the catheter is in an open state and a closed state, when the catheter is in the open state, the deformation ring is in a flat state so that the inner tube is closed, and when the catheter is in the open state, the deformation ring is in a stretching state so that the inner tube is opened.

2. The implantable port of claim 1, wherein: the outer wall of the outer tube is provided with a first diversion trench, the first diversion trench extends along the axial direction of the outer tube, and the first diversion trench is V-shaped.

3. The implantable port of claim 1, wherein: the outer wall of the outer tube is connected with a plurality of developing rings, and the developing rings are arranged at equal intervals along the axial direction of the outer tube.

4. The implantable port of claim 1, wherein: the outer wall of the outer tube is also connected with positioning assemblies, each positioning assembly comprises a plurality of elastic bulges, and the elastic bulges are circumferentially and uniformly distributed on the outer tube.

5. The implantable port of claim 4, wherein: the elastic bulge comprises an arc-shaped portion, the middle of the arc-shaped portion is connected with the outer tube through a supporting portion, and the width of the supporting portion is smaller than that of the arc-shaped portion.

6. The implantable port of claim 4, wherein: at least two positioning assemblies are sequentially arranged along the axial direction of the outer tube.

7. The implantable port of claim 1, wherein: the deformation ring comprises a plurality of monomer rings which are connected in sequence, one end of each monomer ring is provided with a conical bulge, the other end of each monomer ring is provided with a conical groove, and the conical bulge on one monomer ring of two adjacent monomer rings is inserted into the conical groove of the adjacent monomer ring.

8. The implantable port of claim 1, wherein: and the inner tube is sequentially connected with a plurality of deformation rings along the axial direction of the inner tube.

9. The implantable port of claim 8, wherein: and heat preservation strips are adhered to the inner tube between two adjacent deformation rings, and spirally wound on the outer wall of the inner tube.

10. The implantable port of claim 1, wherein: the outer tube is connected with an expansion membrane, a plurality of penetrating holes are formed in the expansion membrane, through holes are formed in the outer tube, the through holes extend from the outer tube to the inner tube, the expansion membrane is in a first state and a second state, the expansion membrane is expanded into a ball shape when in the first state, and the expansion membrane is contracted and attached to the outer wall of the outer tube when in the second state.