CN111588941A

CN111588941A - Infusion port and method of use

Info

Publication number: CN111588941A
Application number: CN202010466767.9A
Authority: CN
Inventors: 尚小军; 陈希明; 钱丰; 豆美娟
Original assignee: Suzhou Linhwa Medical Devices Co ltd
Current assignee: Suzhou Linhwa Medical Devices Co ltd
Priority date: 2020-05-28
Filing date: 2020-05-28
Publication date: 2020-08-28

Abstract

The invention discloses an infusion port, which comprises a port body, a liquid storage cavity arranged in the port body, a connecting pipe used for fixing a catheter and the port body, and an injection piece fixedly arranged on the port body, wherein the plane of the lowest edge of the liquid storage cavity is always higher than or equal to the lowest point of the catheter, and the liquid storage cavity and the catheter have a height difference h, wherein h is more than or equal to 0. The invention has the following beneficial effects: because the height difference exists between the bottom inner wall of the port body and the lowest point of the conduit, the direct flow is ensured in the infusion process, and the medical active substance can not remain in the liquid storage cavity; and the liquid storage cavity and the silica gel are obliquely arranged and matched with the linear type non-traumatic needle, so that the operation and the use of medical personnel are facilitated.

Description

Infusion port and method of use

Technical Field

The invention relates to the technical field of medical articles, in particular to an infusion port and a using method thereof.

Background

The port is generally used for medical infusion and is used in cooperation with a non-invasive needle, and medical liquid is infused into the body of a patient through the non-invasive needle and the port to treat diseases of the patient. The structure of the transfusion port is more general, which is disclosed in US patent No. US4723948, US patent No. US4861341, US patent No. US5281205, US patent No. US9017300, Chinese patent No. CN105163795B, the general structure of which is shown in figure 1, comprising a transfusion port body 101; a reservoir 102 for containing a medically active substance; a connecting tube 103 for connecting the conduits to establish a flow connection between the reservoir and the conduit 104. The port body 101 is provided with an injection piece 105 at the top for piercing with an atraumatic needle 106 and entering into the reservoir 102. The atraumatic needle 106 is typically a 90 ° right angle infusion needle.

Such a port can be implanted in a patient as is known from European patent EP1675641B1 by introducing the port, for example, under the skin (subcutaneous tissue) of the patient and fixing it there. The port is then used for introducing drugs, blood products, nutrients or other medically active substances into the venous or arterial system of a patient, by means of which the active substances can be administered to the patient in particular repeatedly over a longer period of time. Since the port can be completely implanted under the skin of the patient, the risk of infection is reduced, and the active substance can be specifically administered over a longer period of time for treating the patient, without the patient having to be hospitalized for this purpose and without the port obviously obstructing the patient in daily life.

During infusion, the active substance is removed from the reservoir 102 of the port body 101 via a line 104 connected to a connection tube 103 of the port and is delivered to the patient (for example, a vein or artery of the patient). The catheter is here implanted together with the port into the patient and laid such that the active substance is transported to a predetermined location in the patient. However, as shown in FIG. 1, the opening 107 through the port body 101 communicating with the conduit 104 is typically at a higher elevation than the bottom of the reservoir 102 so that when administering an infusion, the active substance level 108 needs to be higher than the opening 107 in order for the active substance to flow through the opening 107 and into the conduit 104. When one infusion is completed, there is a big problem that active substances remain in the reservoir 102 at a space lower than the opening 107, and the substances may contaminate the active substances in the next infusion after being left in the reservoir 102 for a long time. This is not allowed. More likely, the port also exists as a blood sampling device, i.e., blood is returned from the catheter 104 to the reservoir 102 and drawn out of the body by the atraumatic needle 106 with a negative pressure effect. After the blood drawing is completed, the blood may remain in the reservoir chamber 102 at a position lower than the opening 107, which is not allowed.

More specifically, the right-angle puncture of the atraumatic needle is different from the puncture mode of a common infusion needle, so that firstly, the manufacturing process is complex, and secondly, the operation of a medical care user is inconvenient. In addition, during practical use, the effective length of the needle tube needs to be selected by comprehensively considering the depth of the injection port body implanted into subcutaneous tissue, the thickness of an injection piece, the height of a liquid storage cavity of the injection port and other factors, is too short (a needle point hole does not completely support the liquid storage cavity and can cause liquid medicine to leak) and too long (the needle point penetrates the bottom surface of the liquid storage cavity to damage the needle point and the skin of the puncture point cannot be completely attached and fixed with the needle base), and can cause adverse effects.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provides an infusion port and a using method thereof.

The purpose of the invention is realized by the following technical scheme:

an infusion port comprises

A port body;

a reservoir disposed within the port for containing a medically active substance;

a connecting tube for securing the catheter and the port body so as to establish fluid communication between the reservoir and the catheter;

the injection piece is fixedly arranged on the harbor body and is used for the atraumatic needle to puncture and enter the liquid storage cavity;

the plane of the lowest edge of the liquid storage cavity is always higher than or equal to the lowest point of the guide pipe, and the liquid storage cavity and the guide pipe have a height difference h which is more than or equal to 0.

Preferably, the lowest edge of the reservoir chamber is the bottom inner wall of the harbor body, and the bottom inner wall is a plane.

Preferably, the harbor body further comprises a bottom outer wall having a cross-sectional profile conforming to the cross-sectional profile of the bottom inner wall.

Preferably, the reservoir chamber has a first port and a second port, the minimum aperture of the first port is larger than the maximum aperture of the second port, the syringe is fixed in the first port, and the conduit is communicated with the second port.

Preferably, the first port is arranged obliquely, the plane where the first port is located and the plane where the lowest edge is located form an included angle alpha, and alpha is larger than 0 degree and smaller than 90 degrees.

Preferably, the port body has an extension pipe, and the connection pipe is fitted around the extension pipe to fix the guide pipe thereto.

Preferably, the bottom inner wall of the extension tube is an extension of the bottom inner wall of the harbor body.

The invention also discloses a transfusion port, which comprises

A port body;

the liquid storage cavity comprises a bottom inner wall, the flowing connection between the bottom inner wall and the guide pipe has a height difference h, and h is more than or equal to 0.

Preferably, the bottom inner wall has at least one flat surface.

Preferably, the cross section of the liquid storage cavity is a semi-hollow circle, a 3/4 hollow circle, a hollow circle or a hollow ellipse.

The invention also discloses a transfusion port, which comprises

A port body;

the harbor body comprises a bottom inner wall, and a height difference h is formed between the bottom inner wall and the lowest point of the conduit, wherein h is more than or equal to 0.

Preferably, the bottom inner wall is at least partially planar.

The invention also discloses a using method of the transfusion port, which comprises the steps of,

configuring a port, the port comprising

A port body;

the plane of the lowest edge of the liquid storage cavity is always higher than or equal to the lowest point of the guide pipe, the liquid storage cavity and the guide pipe have a height difference h, and h is more than or equal to 0;

a non-invasive needle is configured, and the needle body of the non-invasive needle is linear;

and (3) penetrating the needle body of the atraumatic needle through the injection piece and inserting the atraumatic needle into the liquid storage cavity of the transfusion port.

The invention has the following beneficial effects: because the height difference exists between the bottom inner wall of the port body and the lowest point of the conduit, the direct flow is ensured in the infusion process, and the medical active substance can not remain in the liquid storage cavity; and the liquid storage cavity and the silica gel are obliquely arranged and matched with the linear type non-traumatic needle, so that the operation and the use of medical personnel are facilitated.

Drawings

The technical scheme of the invention is further explained by combining the accompanying drawings as follows:

FIG. 1: is a structural schematic diagram of a transfusion port and a non-invasive needle matched with the transfusion port in the prior art;

FIG. 2: is a schematic structural view of a preferred embodiment of the port of the invention;

fig. 3 a-3 d: is a cross-sectional view taken along a-a in fig. 2, showing four structures, respectively;

FIG. 4: the invention is a schematic use diagram of the transfusion port.

Detailed Description

The present invention will be described in detail below with reference to specific embodiments shown in the drawings. These embodiments are not intended to limit the present invention, and structural, methodical, or functional changes that may be made by one of ordinary skill in the art in light of these embodiments are intended to be within the scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

As shown in fig. 2 to 4, the present invention discloses an infusion port, which comprises, similar to the prior art:

a port body 1;

a reservoir 2 disposed within the port body 1 for containing a medically active substance; liquid storage herein means that there is partial storage of the medical active substance in the cavity during infusion;

a connecting tube 3 for fixing the catheter 4 and the port body 1 so as to establish a fluid connection between the reservoir 2 and the catheter 4;

and the injection piece 5 is fixedly arranged on the port body 1 and is used for puncturing the atraumatic needle 6 and entering the liquid storage cavity 2. The injection member is typically a self-sealing membrane through which the atraumatic needle 6 passes to communicate with the connector. The membrane is generally made of silica gel.

It should be understood by those skilled in the art that although the technical names of the present invention are the same as those of the prior art, the structure thereof is different from that of the prior art, and the following detailed description is made.

Referring specifically to fig. 2, the harbor body 1 comprises a bottom outer wall 10, the lowest edge of the reservoir chamber 2 is the bottom inner wall 7 of the harbor body 1, and the cross-sectional profile of the bottom outer wall 10 is identical to the cross-sectional profile of the bottom inner wall 7.

The liquid storage cavity 2 is provided with a first port 8 and a second port 9, the minimum caliber of the first port 8 is larger than the maximum caliber of the second port 9, and smooth transition is formed from the first port 8 to the second port 9, namely the liquid storage cavity is in an irregular bell-mouth shape. The injection member 5 is fixed in the first port 8, and the conduit 4 is communicated with the second port 9.

As shown in fig. 2, the first port 8 is disposed obliquely so that the axial section of the reservoir 2 is triangular. The plane of the first port 8 and the plane of the lowest edge of the liquid storage cavity 2 form an included angle alpha, and alpha is more than 0 degree and less than 90 degrees.

In the preferred embodiment, the first port 8 and the injection member 5 are parallel to each other, i.e. the inclination angle of the injection member 5 is the same as the inclination angle of the first port 8, and of course, the skilled technician will be able to consider various considerations and the inclination angle of the injection member 5 and the inclination angle of the first port 8 may be different. Most importantly, the lowest point of the first port 8 and the syringe 5 is almost the same height as the lowest edge of the reservoir 2, ensuring that the port body of the implanted port can be kept at the lowest height.

The definition of the cross-section of the reservoir 2 according to the invention can be seen in connection with fig. 3a to 3 d.

In particular, the skilled person will be able to set the cross-section of the reservoir 2 to be semi-hollow circular, 3/4 hollow circular, hollow oval or other, based on various considerations. One skilled in the art should be aware of: in order to prevent the port body from rotating or unnecessarily shaking after the subcutaneous tissue is implanted into the transfusion port, two sides of the port body 1 can be provided with flat side wings or an encapsulated block structure (not shown in the figure), and the side wings can also be provided with suture holes so that medical staff can fix the transfusion port during operation.

As shown in fig. 3a and 3b, the cross section of the reservoir 2 is a semi-hollow circle, 3/4 hollow circle, the bottom inner wall 7 has at least one plane 12, and the plane 12 is the plane of the lowest edge of the reservoir 2; if the cross section of the reservoir 2 disclosed in fig. 3c and 3d is a hollow circle or a hollow ellipse, the plane of the lowest point is the plane of the lowest edge of the reservoir 2.

As can be seen from the figure 2, the plane of the lowest edge of the liquid storage cavity 2 is always higher than or equal to the lowest point of the conduit 4, and the two have a height difference h which is more than or equal to 0, namely, during transfusion, the medical active substance can directly flow into the conduit 4 from the liquid storage cavity 2, and no residue is generated in the liquid storage cavity 2.

It should be noted that the lowest edge is not compared with the ground, but is the lowest edge located at the deepest part of the patient after being implanted into the subcutaneous tissue of the patient.

The harbor body 1 has an extension pipe 11, and the connection pipe 3 is fitted around the outer periphery of the extension pipe 11 to fix the guide pipe 4 thereto. The bottom inner wall of the extension tube 11 is an extension of the bottom inner wall 7 of the harbor body 1. The extension tube 11 is only used for connecting the catheter 4 and the harbor body 1, so the length and the thickness of the extension tube 11 are not considered in the invention, and the specific connection mode can be a connection mode commonly used by technicians in the field such as spinning and buckling, and the like, and the detailed description is not repeated in the invention.

In the preferred embodiment of the invention it is disclosed that the flow connection between the bottom inner wall 7 and the conduit 4 has a height difference h, h ≧ 0. The skilled person will be able to base various considerations on the fact that, in addition to the fact that the bottom edge of the axial cross section of the bottom inner wall 7 is substantially parallel to the bottom edge of the axial cross section of the catheter 4 as disclosed in fig. 2, the bottom edge of the axial cross section of the bottom inner wall 7 may also be at an angle with the bottom edge of the axial cross section of the catheter 4, that is, the bottom edge of the axial cross section of the bottom inner wall 7 is inclined from the first port 8 to the second port 9, so as to generate the effect of gradual closing up, and further facilitate the transmission of the medical active.

In the preferred embodiment of the invention, the height difference h between the bottom inner wall 7 and the lowest point of the conduit 4 is also disclosed, and h is more than or equal to 0. The skilled person will be able to base various considerations on the fact that, in addition to the fact that the bottom wall 7 is shown in fig. 2 as a smooth surface, it is also possible to provide a special surface with flow channels, for example a groove, with a height difference h between the lowest point of the groove and the lowest point of the conduit 4, h ≧ 0.

The invention also discloses a using method of the implantable transfusion port, which comprises the following steps:

providing an infusion port having the structure set forth above;

a non-injury needle 6 is configured, and the needle body of the non-injury needle 6 is linear;

as shown in FIG. 4, the port is placed under the subcutaneous tissue 13 with some or all of the injection member 5 in contact with the subcutaneous tissue. The body of the atraumatic needle 6 is inserted into the reservoir 2 of the port through the oblique subcutaneous tissue and the oblique injection piece 5.

The first port 8 and the injection member 5 are arranged obliquely, which greatly reduces the overall height of the port at the site of implantation, reduces the pulling force of the port on the skin of the patient and reduces the pain and foreign body sensation of the patient.

The invention is matched with a linear type non-invasive needle, is beneficial to the operation and use of medical personnel, improves the effective area utilization rate of a puncture window, reduces the complexity of the operation and reduces the incidence rate of postoperative mechanical phlebitis; reduces the incidence of ischemic necrosis caused by skin tension loss after operation.

It should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can also be combined appropriately to form other embodiments understood by those skilled in the art.

The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.

Claims

1. An infusion port comprises

A port body (1);

a reservoir (2) arranged in the port body (1) for containing a medically active substance;

-a connecting tube (3) for fixing the catheter (4) and the port body (1) so as to establish a fluid connection between the reservoir (2) and the catheter (4);

the injection piece (5) is fixedly arranged on the harbor body (1) and is used for puncturing the atraumatic needle (6) and entering the liquid storage cavity (2);

the method is characterized in that:

the plane of the lowest edge of the liquid storage cavity (2) is always higher than or equal to the lowest point of the guide pipe (4), and the liquid storage cavity and the guide pipe have a height difference h which is more than or equal to 0.

2. The port of claim 1, wherein: the lowest edge of the liquid storage cavity (2) is a bottom inner wall (7) of the harbor body (1), and the bottom inner wall (7) is a plane.

3. The port of claim 2, wherein: the harbor body (1) further comprises a bottom outer wall (10) having a cross-sectional profile corresponding to the cross-sectional profile of the bottom inner wall (7).

4. The port of claim 1, wherein: the liquid storage cavity (2) is provided with a first port (8) and a second port (9), the minimum caliber of the first port (8) is larger than the maximum caliber of the second port (9), the injection piece (5) is fixed in the first port (8), and the conduit (4) is communicated with the second port (9).

5. The port of claim 4, wherein: the first port (8) is arranged in an inclined way, the plane of the first port and the plane of the lowest edge are arranged in an included angle (alpha),

0°＜α＜90°。

6. the port of any one of claims 1 to 5, wherein: the harbor body (1) is provided with an extension pipe (11), and the connecting pipe (3) is sleeved on the periphery of the extension pipe (11) to fix the guide pipe (4) with the extension pipe.

7. The port of claim 6, wherein: the bottom inner wall of the extension pipe (11) is the extension of the bottom inner wall (7) of the harbor body (1).

8. An infusion port comprises

A port body (1);

the method is characterized in that: the liquid storage cavity (2) comprises a bottom inner wall (7), the flowing connection between the bottom inner wall (7) and the guide pipe (4) has a height difference h, and h is more than or equal to 0.

9. The port of claim 8, wherein: the bottom inner wall (7) has at least one plane (12).

10. The port of claim 8, wherein: the cross section of the liquid storage cavity (2) is a semi-hollow circle, 3/4 hollow circle, hollow circle or hollow ellipse.

11. The port of claim 8 or 9 or 10, wherein: the liquid storage cavity (2) is provided with a first port (8) and a second port (9), the minimum caliber of the first port (8) is larger than the maximum caliber of the second port (9), the injection piece (5) is fixed in the first port (8), and the conduit (4) is communicated with the second port (9).

12. The port of claim 11, wherein: the first port (8) is arranged in an inclined way, the plane of the first port and the plane of the lowest edge are arranged in an included angle (alpha),

0°＜α＜90°。

13. the port of claim 8 or 9 or 10, wherein: the harbor body (1) is provided with an extension pipe (11), and the connecting pipe (3) is sleeved on the periphery of the extension pipe (11) to fix the guide pipe (4) with the extension pipe.

14. An infusion port comprises

A port body (1);

the method is characterized in that: the harbor body (1) comprises a bottom inner wall (7), wherein a height difference h is formed between the bottom inner wall (7) and the lowest point of the guide pipe (4), and h is more than or equal to 0.

15. The port of claim 14, wherein: the harbor body (1) further comprises a bottom outer wall (10) having a cross-sectional profile corresponding to the cross-sectional profile of the bottom inner wall (7).

16. The port of claim 14, wherein: the bottom inner wall (7) is at least partially planar.

17. The port of claim 14, wherein: the liquid storage cavity (2) is provided with a first port (8) and a second port (9), the minimum caliber of the first port (8) is larger than the maximum caliber of the second port (9), the injection piece (5) is fixed in the first port (8), and the conduit (4) is communicated with the second port (9).

18. The port of claim 17, wherein: the first port (8) is arranged in an inclined way, the plane of the first port and the plane of the lowest edge are arranged in an included angle (alpha),

0°＜α＜90°。

19. the use method of the transfusion port is characterized in that: comprises the steps of (a) carrying out,

configuring a port, the port comprising

A port body (1);

the plane of the lowest edge of the liquid storage cavity (2) is always higher than or equal to the lowest point of the guide pipe (4), and the liquid storage cavity and the guide pipe have a height difference h which is more than or equal to 0;

a non-injury needle (6) is configured, and the needle body of the non-injury needle (6) is linear;

and (3) penetrating the needle body of the atraumatic needle (6) through the injection piece (5) and inserting the atraumatic needle into the liquid storage cavity (2) of the transfusion port.