CN204840478U

CN204840478U - Can prevent transfusion system of blood refluence

Info

Publication number: CN204840478U
Application number: CN201520563313.8U
Authority: CN
Inventors: 张贵欣
Original assignee: Third Affiliated Hospital of TMMU
Current assignee: Third Military Medical University TMMU; Third Affiliated Hospital of TMMU
Priority date: 2015-07-30
Filing date: 2015-07-30
Publication date: 2015-12-09
Anticipated expiration: 2025-07-30

Abstract

The utility model discloses a can prevent transfusion system of blood refluence, including vein needle, infusion hose and luer connector, still include the blood backstop that is located on the infusion hose, the blood backstop includes the hard tube body and is located hard tube two internal valve pieces to have the ring body on the inner wall of the hard tube body, the diaphragm articulates on the ring body lower surface, when two diaphragms receive blood backflow pressure, but upswing to horizontal limit position to close the passageway of ring body, the passageway that is about to infuse is closed, avoids blood to continue the backward flow. In addition, it is articulated that the diaphragm passes through torsional spring and ring body, and during natural state, two diaphragms are in the horizontality down in torsional spring effect separately, and during the infusion state, the torsional spring resistance can be overcome to liquid medicine pressure makes the passageway of two diaphragm downward swinging in order to open the ring body, and the torsional spring makes the resilience force that is in two diaphragms of opening the form and has certain upswing, and the blood that flows back so just perhaps can make two diaphragm upswings in order to close the infusion passageway under the circumstances of less flow at less pressure.

Description

The transfusion device of backflow of blood can be prevented

Technical field

This utility model relates to a kind of transfusion device, particularly a kind of transfusion device of blood-backflow preventing.

Background technology

Transfusion device be a kind of be mainly used in venous transfusion through aseptic process, the common disposable medical treatment consumptive materials of setting up passage between vein and medicinal liquid, generally by intravenous needle, helmet, infusion tube, liquid medicine filter, flow regulator, drip kettle, bottle plug puncture unit, air inlet pipe air filter connect to form.Operation principle is under atmospheric pressure effect, and the infusion tube that in bottle, liquid runs down is thinner flows into dropping funnel, and when dropping funnel water column pressure is greater than venous pressure, the liquid runs down flexible pipe in bottle flows into vein.In infusion process; medicinal liquid is pressed into the vein of human body by transfusion device (pipe) by gravity and atmospheric pressure; when pressure imbalance; during as hand vein transfusion, the careless slightly needle end that makes of hand upwarps, and blood pressure is greater than medicinal liquid pressure; blood reflux will be caused in inflow infusion pipeline; cause blood back phenomenon, particularly old rheumatism patient blood backflow when going to toilet is very serious, is often back to liquid medicine filter and is just found.

Utility model content

In view of this, the technical problems to be solved in the utility model is to provide a kind of transfusion device preventing backflow of blood, can avoid the blood backflow because pressure imbalance causes.

The transfusion device preventing backflow of blood of the present utility model, comprise the intravenous needle, infusion tube and the female Luer that connect successively, also comprise the blood backstop be positioned on infusion tube, described blood backstop comprises the hard tube body passed through for medicinal liquid and the two valve sheets being positioned at hard tube body, the inwall of described hard tube body have the ring body coaxial with it, described diaphragm is hinged on ring body lower surface, when two diaphragms are subject to blood backflow pressure, can upwards be rocked to horizontal limeit position, and by the pathway closure of ring body.

Further, described diaphragm by torsion spring and ring body hinged, during naturalness, two diaphragms are in level under respective torsion spring effect, and during transfusion state, medicinal liquid pressure can overcome torsion spring resistance makes two diaphragms to lower swing to open the passage of ring body.

Further, in described hard tube body, the below of corresponding diaphragm is provided with gag lever post, and under gag lever post effect, diaphragm is 60-75 ° by pendulum angle during horizontal limeit position to bottom limit position.

Further, described blood backstop 4 is near the end of intravenous needle.

The beneficial effects of the utility model: the transfusion device preventing backflow of blood of the present utility model, comprise the intravenous needle connected successively, infusion tube and female Luer, also comprise the blood backstop be positioned on infusion tube, described blood backstop comprises the hard tube body passed through for medicinal liquid and the two valve sheets being positioned at hard tube body, the inwall of described hard tube body have the ring body coaxial with it, described diaphragm is hinged on ring body lower surface, when two diaphragms are subject to blood backflow pressure, can upwards be rocked to horizontal limeit position, and by the pathway closure of ring body, close by infusion channel, blood is avoided to continue backflow.In addition, described diaphragm by torsion spring and ring body hinged, during naturalness, two diaphragms are in level under respective torsion spring effect, during transfusion state, medicinal liquid pressure can overcome torsion spring resistance makes two diaphragms to lower swing to open the passage of ring body, and torsion spring makes to be in two diaphragms opening shape certain resilience force upwards swung, and the blood of backflow so just can make two diaphragms upwards swing to close infusion channel when less pressure or less flow.

Accompanying drawing explanation

Below in conjunction with drawings and Examples, this utility model is further described.

Fig. 1 is structural representation of the present utility model;

Fig. 2 is the schematic diagram that blood backstop is in open mode;

Fig. 3 is the schematic diagram that blood backstop is in closed condition.

Detailed description of the invention

Below with reference to accompanying drawing, this utility model is described in detail, as shown in the figure: the transfusion device of the prevented backflow of blood of the present embodiment, comprise the intravenous needle 1 connected successively, infusion tube 2 and female Luer 3, also comprise the blood backstop 4 be positioned on infusion tube 2, described blood backstop 4 comprises the hard tube body 401 passed through for medicinal liquid and the two valve sheets 402 being positioned at hard tube body, the inwall of described hard tube body 401 have the ring body 403 coaxial with it, described diaphragm 402 is hinged on ring body 403 lower surface, under ring body restriction, the extreme position that two diaphragms upwards swing is level, and the infusion channel of ring body 403 inner ring is closed, when under transfusion normal condition, two diaphragms 402 are in open mode under medicine action of hydraulic force, as shown in Figure 2.When hand is in incorrect posture and build-up of pressure is uneven, when causing blood backflow, two diaphragms 402 are subject to blood backflow pressure will upwards be rocked to horizontal limeit position, as shown in Figure 3, now the infusion channel of ring body 403 will be closed, and then avoid blood to continue upwards to reflux.Described blood backstop 4 to be advisable near the end of intravenous needle 1 because like this can non-return fast.

As the further improvement of technique scheme, described diaphragm 402 is hinged by torsion spring 404 and ring body, during naturalness, two diaphragms 402 are in level under respective torsion spring 404 acts on, during transfusion state, medicinal liquid pressure can overcome torsion spring 404 resistance makes two diaphragms 402 to lower swing to open the passage of ring body.Torsion spring 404 makes to be in two diaphragms 402 opening shape certain resilience force upwards swung, and the blood of backflow so just can make two diaphragms 402 upwards swing to close infusion channel when less pressure or less flow.

As the further improvement of technique scheme, in described hard tube body 401, the below of corresponding diaphragm 402 is provided with gag lever post 405, under gag lever post 405 acts on, diaphragm 402 is 60-75 ° by pendulum angle during horizontal limeit position to bottom limit position, namely two diaphragms are from the bottom to top in the angle of 30-60 °, so both can ensure the bore of rational opening degree and medicine liquid channel between two diaphragms, even if can ensure again have the larger torque upwards swung perpendicular to the component diaphragm of diaphragm when blood upwards acts on diaphragm.

What finally illustrate is, above embodiment is only in order to illustrate the technical solution of the utility model and unrestricted, although be described in detail this utility model with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can modify to the technical solution of the utility model or equivalent replacement, and not departing from aim and the scope of technical solutions of the utility model, it all should be encompassed in the middle of right of the present utility model.

Claims

1. one kind can prevent the transfusion device of backflow of blood, comprise the intravenous needle (1) connected successively, infusion tube (2) and female Luer (3), it is characterized in that: also comprise the blood backstop (4) be positioned on infusion tube (2), described blood backstop (4) comprises the hard tube body (401) passed through for medicinal liquid and the two valve sheets (402) being positioned at hard tube body, the inwall of described hard tube body (401) have the ring body (403) coaxial with it, described diaphragm (402) is hinged on ring body (403) lower surface, when two diaphragms (402) are subject to blood backflow pressure, can upwards be rocked to horizontal limeit position, and by the pathway closure of ring body (403).

2. the transfusion device preventing backflow of blood according to claim 1, it is characterized in that: described diaphragm (402) is hinged by torsion spring (404) and ring body, during naturalness, two diaphragms (402) are in level under respective torsion spring (404) effect, during transfusion state, medicinal liquid pressure can overcome torsion spring (404) resistance makes two diaphragms (402) to lower swing to open the passage of ring body.

3. the transfusion device preventing backflow of blood according to claim 2, it is characterized in that: in described hard tube body (401), the below of corresponding diaphragm (402) is provided with gag lever post (405), under gag lever post (405) effect, diaphragm (402) is 60-75 ° by pendulum angle during horizontal limeit position to bottom limit position.

4. the transfusion device preventing backflow of blood according to claim 3, is characterized in that: described blood backstop (4) is near the end of intravenous needle.