CN210056978U - Prevent infusion port against current - Google Patents
Prevent infusion port against current Download PDFInfo
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- CN210056978U CN210056978U CN201920310507.5U CN201920310507U CN210056978U CN 210056978 U CN210056978 U CN 210056978U CN 201920310507 U CN201920310507 U CN 201920310507U CN 210056978 U CN210056978 U CN 210056978U
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Abstract
The utility model discloses a prevent infusion port against current, including the casing that the hollow has a bottom, the outside cylinder that has hollow structure that extends of casing side has, the hollow cavity of cylinder and the inner chamber intercommunication of casing, the casing upper end inlays and is equipped with the puncture colloid that makes its upper end sealed, is provided with the elasticity valve in the casing inner chamber, one section that cylinder cavity is close to the casing inner chamber is hollow interior section, the one end of elasticity valve inlays the dress in hollow interior section, and the pit has all been seted up along the axial both ends of cylinder to the elasticity valve, and the elasticity valve middle part has the crack along the cutting of cylinder axial. Compared with the prior art, the utility model has the advantages that the elastic valve is arranged, the pits are arranged at the two ends of the elastic valve, the middle part is cut with the crack, and the thickness of the crack is thinner, so that the blood backflow is prevented, and the safe transfusion of the patient is ensured; the utility model discloses simple structure, the equipment is easy and simple to handle, prevents that the adverse current is effectual, and the leakproofness is good.
Description
Technical Field
The utility model belongs to the technical field of medical instrument, concretely relates to prevent infusion port against current.
Background
An infusion port is a closed infusion device that is fully implanted in the human body and provides a long term venous blood channel for the patient. However, when the puncture needle is pulled out from the existing transfusion port, negative pressure can occur in the cavity of the transfusion port shell, and blood can flow back into the transfusion port, so that the harm to patients is caused; in addition, the tube may be dropped off due to the smoothness of the blood vessel of the individual patient or the infirm bundling of the doctor, and the conventional connection part between the port and the tube has poor sealing performance and complicated assembly operation, which may affect the normal transfusion of the patient.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems, the utility model provides a backflow prevention transfusion harbor.
The purpose of the utility model is realized with the following mode:
an anti-reflux transfusion port comprises a hollow shell with a bottom and an opening at the upper end, wherein a puncture colloid for sealing the upper end of the shell is embedded at the upper end of the shell, a cylinder with a hollow structure extends outwards from the side surface of the shell, the hollow cavity of the cylinder is communicated with the inner cavity of the shell, an elastic valve is arranged in the inner cavity of the shell, the hollow cavity of the cylinder is sequentially divided into a hollow inner section, a hollow middle section and a hollow outer section, the elastic valve is embedded in the hollow inner section, pits are respectively arranged at two ends of the elastic valve along the axial direction of the elastic valve, a crack is cut in the middle of the elastic valve along the axial direction of the elastic valve, and;
the inner wall of the hollow middle section is bonded with a front section of a connecting steel pipe, the remaining part of the connecting steel pipe is sleeved with a hose, the outer side of one end, close to the hollow middle section, of the hose is sequentially sleeved with an elastic connector and a rotating cap along the axial direction of the hose, the elastic connector is clamped with the rotating cap, the elastic connector is integrally located on the inner side of the hollow outer side section, an external thread is arranged on the outer wall of the rotating cap, and the rotating cap is in threaded connection with the inner wall.
When any side pressure of the elastic valve is larger than the conduction critical value of the crack, the crack is opened to be in a conduction state, and liquid flows from one side with larger pressure to the other side through the crack; when the pressure of any side of the elastic valve is smaller than the crack conduction critical value, the crack keeps closed, and the liquid on the two sides of the elastic valve keeps an isolation state; the conduction critical value of the crack on the elastic valve is larger than the maximum pressure in the human blood vessel, is also larger than the fluctuation pressure generated when the puncture needle is pulled out from the puncture colloid, and is smaller than the pressure when liquid is infused during treatment.
The inner diameters of the hollow inner section and the hollow outer section are larger than the inner diameter of the hollow middle section; the inner diameter of the hollow outer section is larger than that of the hollow inner section.
The screw cap extends outwards along one section of the external thread of the screw cap, and the external diameter of the extending end of the screw cap is larger than that of one section of the external thread of the screw cap.
The inner diameter of the elastic connecting body is consistent with that of the screw cap and is larger than the outer diameter of the hose; the inner diameter of the hose is larger than the outer diameter of the connecting steel pipe.
Compared with the prior art, the utility model has the advantages as follows:
(1) the elastic valve is arranged at the communication position of the shell and the cylinder, pits are formed at two ends of the elastic valve, a crack is cut in the middle of the elastic valve, and the thickness of the crack is thinner, so that liquid can flow to one side of a human body through the crack during transfusion, when the puncture needle is pulled out, the pressure change value of the inner cavity of the shell, which is generated in the needle pulling process, is smaller than the pressure required for opening the crack of the elastic valve, and the negative pressure of the inner cavity of the shell can be compensated and balanced by the inflow of the liquid in the puncture needle, so that the blood backflow is prevented, and the safe transfusion of a patient is;
(2) the elastic connecting body, the rotating cap and the connecting steel pipe are matched with the hose, and only the rotating cap needs to be rotated during installation, so that the elastic connecting body is deformed to extrude the connecting steel pipe, the hose tightly wraps the connecting steel pipe, the connecting steel pipe can be quickly installed, and the sealing performance is good;
(3) the utility model discloses simple structure, the equipment is easy and simple to handle, prevents that the adverse current is effectual, and the leakproofness is good.
Drawings
Fig. 1 is a schematic view of the system assembly of the present invention.
Fig. 2 is a combined cross-sectional view of the system of the present invention.
The device comprises a shell 1, a cylinder 1A, a hollow inner section 1A1, an internal thread 1A2, a puncture colloid 2, an elastic valve 3, a crack 3A, a connecting steel pipe 4, an elastic connecting body 5, a small-diameter section 5A, a screw cap 6, an internal groove 6A, an external thread 6B and a hose 7.
Detailed Description
As shown in fig. 1-2, a backflow-preventing port for transfusion comprises a hollow (also called hollow) shell 1 with a bottom and an opening at the upper end, a puncture colloid 2 for sealing the upper end of the shell 1 is embedded at the upper end of the shell 1, a cylinder 1A with a hollow structure extends outwards from the side surface of the shell 1, the hollow cavity of the cylinder 1A is communicated with the inner cavity of the shell 1, an elastic valve 3 is arranged in the inner cavity of the shell 1, the hollow cavity of the cylinder 1A is sequentially divided into a hollow inner section 1A1, a hollow middle section (not marked in the figure) and a hollow outer section (not marked in the figure), the elastic valve 3 is embedded in the hollow inner section 1A1, pits (not marked in the figure) are arranged at both ends of the elastic valve 3 along the axial direction, a crack 3A is cut in the middle of the elastic valve 3 along the axial direction, and the elastic valve 3 is;
hollow middle section inner wall bonds and has 4 anterior segments of connecting steel pipe (be close to the direction of elasticity valve 3 promptly for before), it has hose 7 to connect 4 rest partial overcoat of steel pipe, hose 7 is close to the one end outside in hollow middle section and has cup jointed elastic connector 5 and cap 6 soon along its axial in proper order, elastic connector 5 with revolve cap 6 joint, elastic connector 5 wholly is located the inboard of hollow outside section, it is equipped with external screw thread 6B to revolve cap 6 outer wall, it passes through external screw thread 6B and hollow outside section inner wall threaded connection to revolve cap 6, correspondingly, the hypomere of hollow outside section is provided with internal thread 1A2, internal thread 1A2 and external screw thread 6B spiro union.
The rotating cap 6 is clamped with the elastic connector 5, and specifically comprises the following steps: the hypomere of elastic connection body 5 is equipped with little diameter section 5A, and the external diameter of little diameter section 5A is less than the external diameter of elastic connection body 5 upper segment, and the one end inboard of cap 6 is revolved is equipped with inside groove 6A, and inside groove 6A cooperatees with little diameter section 5A and makes its joint. The whole body of the puncture colloid 2 is T-shaped and is clamped and sealed with the shell 1, and most of the whole body of the puncture colloid 2 is positioned in the inner cavity of the shell 1. The housing 1 may be formed integrally or may be formed by combining a plurality of members.
Further, when any side pressure of the elastic valve 3 is larger than the conduction critical value of the crack 3A, the crack 3A is opened to be in a conduction state, and liquid flows from the side with larger pressure to the other side through the crack 3A; when the pressure of any side of the elastic valve 3 is smaller than the conduction critical value of the crack 3A, the crack 3A is kept closed, and the liquid on the two sides of the elastic valve 3 is kept in an isolation state; the conduction critical value of the crack 3A on the elastic valve 3 is larger than the maximum pressure in the human blood vessel, is also larger than the fluctuation pressure generated when the puncture needle is pulled out from the puncture colloid 2, and is smaller than the pressure when the liquid is infused during the treatment. That is, the elastic valve 3 cannot be opened by intravascular pressure alone or by negative pressure generated by pulling against the cavity of the housing 1, or by a combination of both, and the slit 3A can be opened by the infusion pressure of the liquid. Such a structure can prevent the reverse flow of blood well.
Furthermore, the inner diameters of the hollow core inner section 1A1 and the hollow core outer section are larger than the inner diameter of the hollow core middle section; the inner diameter of the hollow outer section is greater than the inner diameter of the hollow inner section 1a 1.
In order to facilitate the manual screwing operation to quickly connect the second assembly, the screw cap 6 extends outwards along a section of the external thread 6B, and the external diameter of the extending end of the screw cap is larger than that of the section of the external thread 6B.
In order to improve the sealing performance, the inner diameter of the elastic connecting body 5 is consistent with the inner diameter of the screw cap 6 and is slightly larger than the outer diameter of the hose 7; the inner diameter of the hose 7 is larger than the outer diameter of the connecting steel tube 4, and is slightly larger than the outer diameter of the connecting steel tube 4, so that the hose 7 can be fastened on the outer wall of the connecting steel tube 4 due to the elasticity of the hose 7 when being sleeved outside the connecting steel tube 4, and the hose 7 is respectively attached and sealed with the inner wall of the elastic connecting body 5 and the inner wall of the screw cap 6. When the utility model is used, the outer diameter of the elastic valve 3 is tightly sealed with the cavity of the shell 1 and the cylinder 1A, the joints between the connecting steel pipe 4, the elastic connector 5, the screw cap 6 and the hose 7 are in a sealing state, and only the infusion channel at the middle part is left.
The assembling method of the anti-reflux transfusion port comprises the following steps:
firstly, installation of a first combination: installing an elastic valve 3 in a hollow inner section 1A1 of a cylinder 1A, conducting the space in the cylinder 1A and the space in a shell 1 only through a crack 3A, then installing a puncture colloid 2 at the upper end of the shell 1 to seal the upper end of the shell 1, then placing a connecting steel pipe 4 in the cylinder 1A, and bonding the front section of the connecting steel pipe 4 on the inner wall of the hollow middle section of the cylinder 1A to form a first combination;
second, installation of the second assembly: connecting the screw cap 6 and the elastic connecting body 5 together to form a second combination;
thirdly, assembling the anti-reflux infusion port: firstly, the hose 7 penetrates through the hollow cavity of the second assembly, the hose 7 is sleeved outside the connecting steel pipe 4, then the second assembly is screwed into the cylinder 1A of the first assembly, when the elastic connecting body 5 touches the bottom of the hollow outer side section space, the screwing cap 6 is continuously screwed, at the moment, the elastic connecting body 5 is compressed and deformed in the axial direction under screwing pressure, and simultaneously, the two sides along the diameter direction are deformed, the deformation generated by the elastic connecting body 5 forms extrusion force on the front section of the hose 7, so that the hose 7 is also deformed in the diameter direction, and then the connecting steel pipe 4 is extruded, so that the hose 7 tightly wraps the connecting steel pipe 4, the second assembly is quickly connected with the first assembly, and the connection position has no liquid leakage under the infusion pressure in the treatment process.
During infusion, because the infusion pressure of liquid is greater than the conduction critical value of the crack 3A of the elastic valve 3, the crack 3A of the elastic valve 3 is in a conduction state, and the liquid sequentially passes through the crack 3A, the connecting steel pipe 4 and the hose 7 from the inner cavity of the shell 1 to enter a blood vessel of a human body for infusion. After the transfusion is finished, when the puncture needle connected to the puncture colloid 2 is pulled out, the pressure change value of the inner cavity of the shell 1 generated in the needle pulling process is smaller than the pressure required for opening the crack 3A of the elastic valve 3, and at the moment, the negative pressure in the shell 1 is compensated and balanced by the liquid in the puncture needle flowing into the inner cavity of the shell 1, so that the blood backflow is prevented.
Claims (5)
1. The utility model provides a prevent infusion port against current, includes that the hollow has a bottom, upper end open-ended casing (1), casing (1) upper end inlays and is equipped with and makes its upper end sealed puncture colloid (2), and casing (1) side outwards extends has cylinder (1A) that has hollow structure, and the hollow cavity of cylinder (1A) communicates with the inner chamber of casing (1), its characterized in that: an elastic valve (3) is arranged in an inner cavity of the shell (1), a hollow cavity of the cylinder (1A) is sequentially divided into a hollow inner section (1A 1), a hollow middle section and a hollow outer section, the elastic valve (3) is embedded in the hollow inner section (1A 1), pits are formed in the two axial ends of the elastic valve (3), a crack (3A) is cut in the middle of the elastic valve (3) along the axial direction of the elastic valve, and the elastic valve (3) is a cylindrical elastic body;
the utility model discloses a hollow section of a building, including hollow middle section inner wall, connecting steel pipe (4), hose (7), elastic connector (5) and cap (6) soon have been cup jointed along its axial in proper order in the one end outside that hose (7) are close to hollow middle section, elastic connector (5) with revolve cap (6) joint, elastic connector (5) wholly are located the inboard of hollow outside section, it is equipped with external screw thread (6B) to revolve cap (6) outer wall, it is connected with hollow outside section inner wall threaded connection through external screw thread (6B) to revolve cap (6).
2. The anti-reflux infusion port as set forth in claim 1, wherein: when any side pressure of the elastic valve (3) is larger than the conduction critical value of the crack (3A), the crack (3A) is opened and is in a conduction state, and liquid flows from one side with larger pressure to the other side through the crack (3A); when the pressure of any side of the elastic valve (3) is smaller than the conduction critical value of the crack (3A), the crack (3A) is kept closed, and the liquid on the two sides of the elastic valve (3) is kept in an isolation state; the conduction critical value of the crack (3A) on the elastic valve (3) is larger than the maximum pressure in the human blood vessel, is also larger than the fluctuation pressure generated when the puncture needle is pulled out from the puncture colloid (2), and is smaller than the pressure when the liquid is infused during the treatment.
3. The anti-reflux infusion port as set forth in claim 1, wherein: the inner diameters of the hollow inner section (1A 1) and the hollow outer section are larger than the inner diameter of the hollow middle section; the inner diameter of the hollow outer section is larger than the inner diameter of the hollow inner section (1A 1).
4. The anti-reflux infusion port as set forth in claim 1, wherein: the screw cap (6) extends outwards along one section of the external thread (6B), and the external diameter of the extending end of the screw cap is larger than that of one section of the external thread (6B).
5. The anti-reflux infusion port as set forth in claim 1, wherein: the inner diameter of the elastic connecting body (5) is consistent with that of the screw cap (6) and is larger than the outer diameter of the hose (7); the inner diameter of the hose (7) is larger than the outer diameter of the connecting steel pipe (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920310507.5U CN210056978U (en) | 2019-03-12 | 2019-03-12 | Prevent infusion port against current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920310507.5U CN210056978U (en) | 2019-03-12 | 2019-03-12 | Prevent infusion port against current |
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| Publication Number | Publication Date |
|---|---|
| CN210056978U true CN210056978U (en) | 2020-02-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920310507.5U Active CN210056978U (en) | 2019-03-12 | 2019-03-12 | Prevent infusion port against current |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109771736A (en) * | 2019-03-12 | 2019-05-21 | 河南曙光汇知康生物科技股份有限公司 | A kind of Anti-reflux infusion port and its assemble method |
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2019
- 2019-03-12 CN CN201920310507.5U patent/CN210056978U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109771736A (en) * | 2019-03-12 | 2019-05-21 | 河南曙光汇知康生物科技股份有限公司 | A kind of Anti-reflux infusion port and its assemble method |
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