CN204840478U - Can prevent transfusion system of blood refluence - Google Patents

Abstract

The utility model discloses an infusion device capable of preventing blood backflow, which comprises a venous needle, an infusion hose and a Luer connector, and also includes a blood stopper on the infusion hose. The blood stopper includes a hard tube body and a The two valves in the hard tube body have a ring body on the inner wall of the hard tube body, and the diaphragms are hinged on the lower surface of the ring body. The channel is closed, that is, the infusion channel is closed to prevent the blood from continuing to flow back. In addition, the diaphragm is hinged to the ring body through the torsion spring. In the natural state, the two diaphragms are in a horizontal state under the action of their respective torsion springs. In the state of infusion, the pressure of the liquid medicine can overcome the resistance of the torsion spring and make the two diaphragms swing downward to open. In the channel of the ring body, the torsion spring makes the two diaphragms in the open state have a certain upward swing resilience, so that the returning blood can make the two diaphragms swing upward under the condition of a small pressure or a small flow. Close the infusion channel.

Description

An infusion set that prevents backflow of blood

technical field

The utility model relates to an infusion set, in particular to an infusion set for preventing blood backflow.

Background technique

The infusion set is a common disposable medical consumable that is mainly used for intravenous infusion after aseptic treatment to establish a channel between the vein and the liquid medicine. It generally consists of an intravenous needle, a protective cap, an infusion hose, and a liquid medicine filter. , flow rate regulator, drip pot, cork piercer, air intake pipe air filter connection. The working principle is that under the action of atmospheric pressure, the liquid in the bottle flows into the drip funnel along the thinner infusion hose. When the water column pressure of the drip funnel is greater than the venous pressure, the liquid in the bottle flows into the vein along the hose. During the infusion process, the infusion device (tube) injects the medicine into the veins of the human body through gravity and atmospheric pressure. The pressure of the liquid medicine will cause the blood to flow back into the infusion line in reverse, causing the phenomenon of blood backflow, especially when the elderly rheumatism patients go to the toilet, the blood backflow is very serious, and the blood backflow is often found in the liquid medicine filter.

Utility model content

In view of this, the technical problem to be solved by the utility model is to provide an infusion set capable of preventing blood backflow, which can avoid blood backflow caused by pressure imbalance.

The infusion device of the utility model that can prevent blood backflow includes a venous needle connected in sequence, an infusion hose and a Luer connector, and also includes a blood stopper located on the infusion hose, and the blood stopper includes a drug supply liquid The hard tube body passing through and the two valve sheets located in the hard tube body, the inner wall of the hard tube body has a ring body coaxial with it, the diaphragm is hinged on the lower surface of the ring body, and the two diaphragms are subjected to blood return pressure , it can swing up to the horizontal limit position, and the passage of the ring body is closed.

Further, the diaphragms are hinged to the ring body through torsion springs. In the natural state, the two diaphragms are in a horizontal state under the action of their respective torsion springs. In the state of infusion, the pressure of the liquid medicine can overcome the resistance of the torsion springs to make the two diaphragms swing downward. To open the channel of the ring body.

Further, a limit rod is provided below the corresponding diaphragm in the hard tube body, and under the action of the limit rod, the swing angle of the diaphragm from the horizontal limit position to the hem limit position is 60-75°.

Further, the blood stopper 4 is close to the end of the venous needle.

Beneficial effects of the present utility model: the infusion device of the present utility model, which can prevent blood from flowing backward, includes a venous needle, an infusion hose and a Luer connector connected in sequence, and also includes a blood stopper located on the infusion hose, and the blood The non-return device includes a hard tube body through which the medicinal liquid passes and two valve sheets located in the hard tube body. The inner wall of the hard tube body has a ring body coaxial with it, and the diaphragm is hinged on the lower surface of the ring body. When the two diaphragms are subjected to blood backflow pressure, they can swing upward to the horizontal limit position, and close the channel of the ring body, that is to say, the infusion channel is closed to prevent the blood from continuing to backflow. In addition, the diaphragms are hinged to the ring body through torsion springs. In the natural state, the two diaphragms are in a horizontal state under the action of their respective torsion springs. In the state of infusion, the pressure of the liquid medicine can overcome the resistance of the torsion springs and make the two diaphragms swing downward. In order to open the channel of the ring body, the torsion spring makes the two diaphragms in the open state have a certain upward swing resilience, so that the returning blood can make the two diaphragms upward under the condition of relatively small pressure or small flow. Swing to close the infusion channel.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is described further.

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

Fig. 2 is a schematic diagram of the blood check device in an open state;

Fig. 3 is a schematic diagram of the blood stopper in a closed state.

Detailed ways

The utility model will be described in detail below in conjunction with the accompanying drawings, as shown in the figure: the infusion set that can prevent blood backflow in this embodiment includes a venous needle 1, an infusion hose 2 and a luer connector 3 connected in sequence, and also includes a The blood checker 4 on the infusion hose 2, the blood checker 4 includes a hard tube body 401 for the liquid medicine to pass through and two valve sheets 402 located in the hard tube body, the inner wall of the hard tube body 401 has The ring body 403 coaxial with it, the diaphragm 402 is hinged on the lower surface of the ring body 403, under the restriction of the ring body, the limit position of the upward swing of the two diaphragms is in a horizontal state, and the infusion channel of the inner ring of the ring body 403 Closed, when the infusion is in a normal state, the two diaphragms 402 are in an open state under the pressure of the liquid medicine, as shown in FIG. 2 . When the hand is in an incorrect posture and the pressure is unbalanced, resulting in blood backflow, the two diaphragms 402 will swing up to the horizontal limit position under the blood backflow pressure, as shown in Figure 3, at this time the infusion channel of the ring body 403 will be closed. Closed, thereby preventing the blood from continuing to flow upwards. It is advisable for the blood stopper 4 to be close to the end of the venous needle 1, because it can stop back quickly.

As a further improvement of the above technical solution, the diaphragm 402 is hinged to the ring body through the torsion spring 404. In the natural state, the two diaphragms 402 are in a horizontal state under the action of the respective torsion spring 404. In the state of infusion, the pressure of the liquid medicine can overcome The resistance of the torsion spring 404 makes the two diaphragms 402 swing down to open the channel of the ring body. The torsion spring 404 makes the two diaphragms 402 in the open state have a certain resilience to swing upwards, so that the returning blood can make the two diaphragms 402 swing upwards to close the infusion solution under the condition of a small pressure or a small flow rate. aisle.

As a further improvement of the above technical solution, a limit rod 405 is provided under the corresponding diaphragm 402 in the hard tube body 401. Under the action of the limit rod 405, the swing angle of the diaphragm 402 from the horizontal limit position to the hem limit position It is 60-75°, that is, the angle between the two diaphragms is 30-60° from bottom to top, which can not only ensure a reasonable opening between the two diaphragms, that is, the caliber of the liquid medicine channel, but also ensure that when the blood acts upward on the When the diaphragm is on, there is a larger component force perpendicular to the diaphragm, that is, the torque that the diaphragm swings upwards.

Finally, it is noted that the above embodiments are only used to illustrate the technical solutions of the present utility model without limitation. Although the utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the utility model can be Modifications or equivalent replacements of the technical solutions without departing from the spirit and scope of the technical solutions of the utility model shall be covered by the claims of the utility model.

Claims (4)

1. An infusion set capable of preventing blood backflow, comprising a venous needle (1), an infusion hose (2) and a luer connector (3) connected in sequence, and is characterized in that: it also includes an infusion hose (2) The blood checker (4), the blood checker (4) includes a hard tube body (401) through which the medical liquid passes and two valve pieces (402) located in the hard tube body, the hard tube body (401 ) has a ring body (403) coaxial with it on the inner wall, and the diaphragm (402) is hinged on the lower surface of the ring body (403). When the two diaphragms (402) are subjected to blood return pressure, they can swing upward to the horizontal limit position, and the passage of the ring body (403) is closed. 2. The infusion set capable of preventing blood backflow according to claim 1, characterized in that: the diaphragm (402) is hinged to the ring body through a torsion spring (404), and in a natural state, the two diaphragms (402) Under the action of the respective torsion springs (404), they are in a horizontal state. In the infusion state, the pressure of the liquid medicine can overcome the resistance of the torsion springs (404) and make the two diaphragms (402) swing downward to open the passage of the ring body. 3. The infusion set capable of preventing blood backflow according to claim 2, characterized in that: a limit rod (405) is provided under the corresponding diaphragm (402) in the hard tube body (401), Under the action of (405), the swing angle of the diaphragm (402) from the horizontal limit position to the hem limit position is 60-75°. 4. The infusion set capable of preventing blood backflow according to claim 3, characterized in that: the blood stopper (4) is close to the end of the venous needle.