Device for preventing contamination of positive-pressure connector of indwelling needle and method based on same

Abstract

A device for preventing contamination of a positive-pressure connector (6) of an indwelling needle and a method based on same. The device comprises a shell (1), a connecting port (3) fixedly connected to the shell (1) and used for connecting to the positive-pressure connector (6), an air pressure balance hole (5) disposed opposite to the connecting port (3) and provided on the shell (1), and a filtering membrane (2) provided between the air pressure balance hole (5) and the connecting port (3). The device is simple in structure, adopts a structural design of the filtering membrane (2), can filter microorganisms, bacteria, viruses, dusts, and particulate pollution sources, and is used during indwelling of infusion intervals to prevent the positive-pressure connector (6) from being exposed to the air and maintain the aseptic state and positive-pressure condition of the positive-pressure connector (6) during indwelling.

Claims

1. A device for preventing contamination of a positive-pressure connector of an indwelling needle, comprising: a shell; a connecting port fixedly connected to the shell and used for connecting to the positive-pressure connector; an air pressure balance hole disposed opposite to the connecting port and provided on the shell; and a plurality of filtering membranes disposed between the air pressure balance hole and the connecting port; among the plurality of filtering membranes, the filtering membrane closest to the air pressure balance hole is a primary filtering membrane, wherein the primary filtering membrane is separated from the other filtering membranes; wherein a top of the shell is provided with an upward convex part; the air pressure balance hole is at the upward convex part; the plurality of filtering membranes comprises: the primary filtering membrane clinging to a bottom of the air pressure balance hole; and a second filtering membrane and a third filtering membrane sequentially provided from top to bottom below the primary filtering membrane, wherein the third filtering membrane is clinging to a top of the connecting port; and the connecting port is internally provided with an internal thread adapted to an external thread of the positive-pressure connector.

2. The device for preventing contamination of the positive-pressure connector of the indwelling needle according to claim 1, wherein a pore diameter of the plurality of filtering membranes is 0.02-2 μm, and the plurality of filtering membranes comprises a polyethersulfone membrane, a cellulose filter membrane, a nuclear track membrane, an ion-exchange membrane, a nylon membrane, a polytetrafluoroethylene membrane, a polyvinylidene fluoride membrane, or a polypropylene membrane; the shape of the shell comprises a cylindrical shape, a spherical shape, an ellipsoidal shape, a rectangular shape, a gourd shape, an upper convex lower flat shape, an upper flat lower convex shape, an upper large lower small shape, or an upper small lower large shape; the diameter of the air pressure balance hole is from a nanometer to a millimeter, and the shape of the air pressure balance hole comprises a circle, an ellipse, a square, a rectangle, or a triangle.

3. A method using a device for preventing contamination of a positive-pressure connector of an indwelling needle, wherein the device is comprises: a shell, a connecting port fixedly connected to the shell and used for connecting to the positive-pressure connector, an air pressure balance hole disposed opposite to the connecting port and provided on the shell, and a plurality of filtering membranes disposed between the air pressure balance hole and the connecting port, wherein among the plurality of filtering membranes, the filtering membrane closest to the air pressure balance hole is a primary filtering membrane, wherein the primary filtering membrane is separated from the other filtering membranes; wherein the method comprises: providing the plurality of filtering membranes between the air pressure balance hole and the connecting port; and isolating and filtering microorganisms, bacteria, viruses, dusts and particulate pollution sources through the plurality of filtering membranes, wherein an inner cavity of the shell is in communication with the outside through the air pressure balance hole to achieve air exchange, and ensure that the device is in a positive-pressure state; wherein a top of the shell is provided with an upward convex part; the air pressure balance hole is at the upward convex part; the plurality of filtering membranes comprises: the primary filtering membrane clinging to a bottom of the air pressure balance hole; and a second filtering membrane and a third filtering membrane sequentially provided from top to bottom below the primary filtering membrane, wherein the third filtering membrane is clinging to a top of the connecting port; and the connecting port is internally provided with an internal thread adapted to an external thread of the positive-pressure connector.

4. A device for preventing contamination of a positive-pressure connector of an indwelling needle, comprising: a shell; a connecting port fixedly connected to the shell and used for connecting to the positive-pressure connector; a plurality of air pressure balance holes disposed opposite to the connecting port and provided on the shell; and a plurality of filtering membranes disposed between the plurality of air pressure balance holes and the connecting port; among the plurality of filtering membranes, the filtering membrane of the plurality of filtering membranes that is positioned closest to more of the plurality of air pressure balance holes is a primary filtering membrane, wherein the primary filtering membrane is separated from the other filtering membranes; wherein a top of the shell is provided with an upward convex part; the air pressure balance hole is at the upward convex part; the plurality of filtering membranes comprises: the primary filtering membrane clinging to a bottom of the air pressure balance hole; and a second filtering membrane and a third filtering membrane sequentially provided from top to bottom below the primary filtering membrane, wherein the third filtering membrane is clinging to a top of the connecting port; and the connecting port is internally provided with an internal thread adapted to an external thread of the positive-pressure connector.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a cross-sectional view of Embodiment 1.

(2) FIG. 2 is a cross-sectional view of Embodiment 2.

(3) FIG. 3 is a cross-sectional view of Embodiment 3.

(4) FIG. 4 is a cross-sectional view of Embodiment 4.

(5) FIG. 5 is a cross-sectional view of Embodiment 5.

(6) FIG. 6 is a cross-sectional view of Embodiment 6.

(7) FIG. 7 is a schematic structural diagram of an assembly of a device and a positive-pressure connector consistent with the present disclosure.

DESCRIPTION OF MARKS IN THE FIGURES

(8) 1—shell, 2—single layer filtering membrane, 2a—primary filtering membrane, 2b—second filtering membrane, 2c—third filtering membrane, 3—connecting port, 4—internal thread, 5—air pressure balance hole, 6—positive-pressure connector.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

(9) The wide application of intravenous indwelling needles not only greatly reduces pain caused by repeated punctures in patients' long-term treatment, but also reduces the workload of nursing. In particular, the intravenous indwelling needle with a positive-pressure connector can prevent the medical staff from being pricked by needles because needles are not needed, thereby ensuring the personal safety of the nursing staff.

(10) Disclosed is an anticontamination structure of a positive-pressure connector of a medical indwelling needle, which is technically characterized in that one end is closed and the other end forms a cylindrical interface cap with an internal thread, and the internal thread at the end of the interface cap can be tightly connected to the external thread of the positive-pressure connector. Although the utility model patent can prevent the positive-pressure connector from being exposed, the utility model allows the positive-pressure connector to be in a closed space, which destroys the positive-pressure condition of the positive-pressure connector.

(11) Disclosed is a protective cap for preventing contamination of a positive-pressure connector of a medical indwelling needle, which is technically characterized in that the protective cap includes a cap and a tubular cap wall, the tubular cap wall is internally provided with an internal thread adapted to an external thread of the positive-pressure connector, a wiping device is disposed on the cap, and cotton is in the wiping device. After infusion, the protective cap of the utility model is installed on the positive-pressure connector, and before performing infusion again, the wiping device is rotated. The whole operation step is cumbersome, and the built-in cotton cannot completely disinfect the positive-pressure connector.

(12) At present, a membrane isolation method is not used in the technology to prevent contamination of positive-pressure connectors. However, the membrane isolation method is widely used in the production process of pharmaceuticals, especially in the manufacture process of liquid medicines, because filtering membranes can effectively remove bacteria and particles, and the membrane isolation method is safe and reliable.

(13) The present disclosure is explained in detail with reference to the accompanying drawings and specific embodiments.

Embodiment 1

(14) As shown in FIG. 1, the device according to this embodiment includes a shell 1, a single layer filtering membrane 2 and a connecting port 3. The connecting port 3 is internally provided with an internal thread 4 adapted to an external thread of a positive-pressure connector 6, an air pressure balance hole 5 is disposed at the top of the shell 1, and the single layer filtering membrane 2 is clinging to the bottom of the air pressure balance hole 5.

(15) In this embodiment, the pore diameter of the filtering membrane is from a nanometer to a micrometer, and the filtering membrane includes, but is not limited to, a polyethersulfone membrane, a cellulose filter membrane, a nuclear track membrane, an ion-exchange membrane, a nylon membrane, a polytetrafluoroethylene membrane, a polyvinylidene fluoride membrane, or a polypropylene membrane.

(16) When structural design is performed, the shape of the shell 1 includes, but is not limited to, a cylindrical shape, a spherical shape, an ellipsoidal shape, a rectangular shape, a gourd shape, an upper convex lower flat shape, an upper flat lower convex shape, an upper large lower small shape, or an upper small lower large shape.

(17) The pore diameter of the air pressure balance hole 5 is from a nanometer to a millimeter, and the shape of the air pressure balance hole 5 includes, but is not limited to, a circle, an ellipse, a square, a rectangle, or a triangle.

(18) The device according to this embodiment is provided with the adapted connecting port 3, which can be connected to the positive-pressure connector 6.

(19) The present disclosure further provides a method based on the device according to this embodiment, a filtering membrane is disposed between an air pressure balance hole and a connecting port, and microorganisms, bacteria, viruses, dusts and particulate pollution sources are isolated and filtered through the filtering membrane. The inner cavity of the shell is in communication with the outside through the air pressure balance hole to achieve air exchange, and ensure that the device is in a positive-pressure state.

Embodiment 2

(20) As shown in FIG. 2, the device according to this embodiment includes a shell 1, a connecting port 3 fixedly connected to the shell 1 and used for connecting to the positive-pressure connector 6, an air pressure balance hole 5 disposed opposite to the connecting port 3 and provided on the shell 1, and a filtering membrane disposed between the air pressure balance hole 5 and the connecting port 3.

(21) The air pressure balance hole 5 is at the top of the shell 1, and the filtering membrane includes a primary filtering membrane 2a clinging to the bottom of the air pressure balance hole 5 and a second filtering membrane 2b directly below the primary filtering membrane 2a, and the connecting port 3 is internally provided with an internal thread 4 adapted to an external thread of the positive-pressure connector 6.

(22) The rest are the same as in the Embodiment 1.

Embodiment 3

(23) As shown in FIG. 3, the device according to this embodiment includes a shell 1, a connecting port 3 fixedly connected to the shell 1 and used for connecting to the positive-pressure connector 6, an air pressure balance hole 5 disposed opposite to the connecting port 3 and provided on the shell 1, and a filtering membrane disposed between the air pressure balance hole 5 and the connecting port 3.

(24) The top of the shell 1 is provided with an upward convex part, and the air pressure balance hole 5 is at the convex part. The filtering membrane includes a primary filtering membrane 2a clinging to the bottom of the air pressure balance hole 5, and a second filtering membrane 2b and a third filtering membrane 2c sequentially disposed from the top to the bottom below the primary filtering membrane 2a. The third filtering membrane 2c is disposed clinging to the top of the connecting port 3, and the connecting port 3 is internally provided with an internal thread 4 adapted to an external thread of the positive-pressure connector 6.

(25) The rest are the same as in Embodiment 1.

Embodiment 4

(26) As shown in FIG. 4, the device according to this embodiment includes a shell 1, a connecting port 3 fixedly connected to the shell 1 and used for connecting to the positive-pressure connector 6, an air pressure balance hole 5 disposed opposite to the connecting port 3 and provided on the shell 1, and a filtering membrane disposed between the air pressure balance hole 5 and the connecting port 3.

(27) The top of the shell 1 is provided with a downward groove, the air pressure balance hole 5 is at the groove, the interior of the shell 1 is provided with an upward convex platform, the platform is provided with at least one air vent, and the air vent can conduct air in upper and lower cavities. The shape of the air vent includes, but is not limited to, a circle, an ellipse, a square, a rectangle, or a triangle. The filtering membrane includes a primary filtering membrane 2a clinging to the bottom of the air pressure balance hole 5 and a second filtering membrane 2b laid on the platform, and the connecting port 3 is internally provided with an internal thread 4 adapted to an external thread of the positive-pressure connector 6.

(28) The rest are the same as in Embodiment 1.

Embodiment 5

(29) As shown in FIG. 5, the device according to this embodiment includes a shell 1, a connecting port 3 fixedly connected to the shell 1 and used for connecting to the positive-pressure connector 6, an air pressure balance hole 5 provided on the shell 1, and a filtering membrane disposed between the air pressure balance hole 5 and the connecting port 3.

(30) The air pressure balance hole 5 is at the side wall of the shell 1, the interior of the shell 1 is provided with an upward convex platform, the platform is provided with at least one air vent, and the air vent can conduct air in upper and lower cavities. The shape of the air vent includes, but is not limited to, a circle, an ellipse, a square, a rectangle, or a triangle. The filtering membrane includes a primary filtering membrane 2a laid on the platform and a second filtering membrane 2b disposed between the primary filtering membrane 2a and the connecting port 3, and the connecting port 3 is internally provided with an internal thread 4 adapted to the external thread of the positive-pressure connector 6.

(31) The rest are the same as in Embodiment 1.

Embodiment 6

(32) As shown in FIG. 6, the device according to this embodiment includes a shell 1, a connecting port 3 fixedly connected to the shell 1 and used for connecting to the positive-pressure connector 6, an air pressure balance hole 5 disposed opposite to the connecting port 3 and provided on the shell 1, and a filtering membrane disposed between the air pressure balance hole 5 and the connecting port 3.

(33) The air pressure balance hole 5 is at the top of the shell 1, the filtering membrane includes a primary filtering membrane 2a clinging to the bottom of the air pressure balance hole 5 and a second filtering membrane 2b clinging to the top of the connecting port 3, and the connecting port 3 is internally provided with an internal thread 4 adapted to an external thread of the positive-pressure connector 6.

(34) The rest are the same as in Embodiment 1.

Embodiment 7

(35) As shown in FIG. 7, an internal thread 4 of a device according to this embodiment is connected to an external thread of a positive-pressure connector 6.

(36) The rest are the same as in Embodiment 3.

(37) After an infusion, the device is installed at the interface end of the positive-pressure connector 6 through the connecting port 3, to prevent the interface of the positive-pressure connector 6 from being contaminated by potential contaminants due to long-time exposure to the air. At the next infusion, the anticontamination device sleeved on the positive-pressure connector 6 is detached, and then conventional infusion can be performed. Since the air pressure balance hole 5 is on the shell 1 of the device, the positive pressure effect can be maintained for a long time. Since the rejection coefficient of the filtering membrane is high, microorganisms, dusts, particulate matter and the like can be effectively filtered and cannot contaminate the interface of the positive-pressure connector 6. Due to the design of the multilayer filtering membrane, deposition of moisture in the air in the shell 1 can be avoided. Since the interface of the positive-pressure connector 6 is not exposed to the air, nursing staff do not need to wipe to disinfect the interface of the positive-pressure connector with alcohol, thereby improving the working efficiency of medical staff.

(38) The above description of the embodiments is intended to facilitate the understanding and use of the present disclosure by persons of ordinary skill in the art. It is apparent to those skilled in the art that various modifications can be readily made to these embodiments and the general principles described herein can be applied to other embodiments without creative efforts. Accordingly, the present disclosure is not limited to the embodiments described above, and all modifications and variations made by those skilled in the art within the scope of the present disclosure should fall within the scope of the present disclosure.