CN111588941A - Infusion port and method of use - Google Patents

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

101; a

102 for containing a medically active substance; a connecting

103 for connecting the conduits to establish a flow connection between the reservoir and the

104. The

101 is provided with an

105 at the top for piercing with an

106 and entering into the

102. The

106 is typically a 90 ° right angle infusion needle.

During infusion, the active substance is removed from the

102 of the

101 via a

104 connected to a

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

107 through the

101 communicating with the

104 is typically at a higher elevation than the bottom of the

102 so that when administering an infusion, the

108 needs to be higher than the

107 in order for the active substance to flow through the

107 and into the

104. When one infusion is completed, there is a big problem that active substances remain in the

102 at a space lower than the

107, and the substances may contaminate the active substances in the next infusion after being left in the

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

104 to the

102 and drawn out of the body by the

106 with a negative pressure effect. After the blood drawing is completed, the blood may remain in the

102 at a position lower than the

107, which is not allowed.

a

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

3 for fixing the catheter 4 and the port body 1 so as to establish a fluid connection between the

2 and the catheter 4;

and the

5 is fixedly arranged on the port body 1 and is used for puncturing the

6 and entering the

2. The injection member is typically a self-sealing membrane through which the

6 passes to communicate with the connector. The membrane is generally made of silica gel.

Referring specifically to fig. 2, the harbor body 1 comprises a bottom

10, the lowest edge of the

2 is the bottom

7 of the harbor body 1, and the cross-sectional profile of the bottom

10 is identical to the cross-sectional profile of the bottom

7.

The

2 is provided with a

8 and a second port 9, the minimum caliber of the

8 is larger than the maximum caliber of the second port 9, and smooth transition is formed from the

8 to the second port 9, namely the liquid storage cavity is in an irregular bell-mouth shape. The

5 is fixed in the

8, and the conduit 4 is communicated with the second port 9.

As shown in fig. 2, the

8 is disposed obliquely so that the axial section of the

2 is triangular. The plane of the

8 and the plane of the lowest edge of the

2 form an included angle alpha, and alpha is more than 0 degree and less than 90 degrees.

In the preferred embodiment, the

8 and the

5 are parallel to each other, i.e. the inclination angle of the

5 is the same as the inclination angle of the

8, and of course, the skilled technician will be able to consider various considerations and the inclination angle of the

5 and the inclination angle of the

8 may be different. Most importantly, the lowest point of the

8 and the

5 is almost the same height as the lowest edge of the

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

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

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

2 is a semi-hollow circle, 3/4 hollow circle, the bottom

7 has at least one

12, and the

12 is the plane of the lowest edge of the

2; if the cross section of the

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

2.

As can be seen from the figure 2, the plane of the lowest edge of the

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

2, and no residue is generated in the

2.

The harbor body 1 has an

11, and the

3 is fitted around the outer periphery of the

11 to fix the guide pipe 4 thereto. The bottom inner wall of the

11 is an extension of the bottom

7 of the harbor body 1. The

11 is only used for connecting the catheter 4 and the harbor body 1, so the length and the thickness of the

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

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

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

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

7 is inclined from the

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

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

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.

a

6 is configured, and the needle body of the

6 is linear;

as shown in FIG. 4, the port is placed under the

13 with some or all of the

5 in contact with the subcutaneous tissue. The body of the

6 is inserted into the

2 of the port through the oblique subcutaneous tissue and the

5.

The

8 and the

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.

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);

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 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);

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 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);

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 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.