CN204521992U - The way flow female Luer that positive pressure controls - Google Patents

Abstract

The utility model discloses a one-way flow Luer joint controlled by positive pressure, which comprises a one-way flow safety device, which is sealed and connected with the rear Luer joint; the one-way flow safety device includes an The outer wall connected by the Luer connector, the outer wall is equipped with a blind tube, the outer periphery of the blind tube is the inner cavity of the one-way flow safety device and the inner cavity of the Luer connector, the open end of the blind tube is the liquid medicine input port, and the rear wall of the blind tube is A through hole communicating with the inner cavity of the Luer connector is set on the top, and the outer surface of the tube wall from the end of the blind tube to the front of the through hole is in the form of a left and right plane connected with the arc surface; Set elastic sleeve. The utility model has a reasonable structure, can effectively prevent excessive infusion of liquid medicine or the occurrence of backflow of blood, and ensures positive pressure control of infusion safety.

Description

Positive Pressure Controlled Uni-Flow Luer

technical field

The utility model relates to a luer connector.

Background technique

With the development of medicine, drug injection pumps are becoming more and more common in clinical applications, and the usage of drug injection pumps is also increasing. When the injection pump is incorrectly installed or malfunctions, the injection pump may lose the function of controlling the infusion rate or preventing blood backflow. During the infusion process, due to various reasons, the pressure in the infusion tube will decrease, causing the venous blood to flow back into the infusion line. When the return blood is too much or the time is too long, the blood is easy to coagulate in the infusion line, resulting in blockage of the infusion line and poor infusion, especially the infusion pump loses the function of infusion speed control, and the infusion pump is higher than the patient's infusion If it is not used at the end, it may lead to the risk of excessive infusion, causing dissatisfaction among patients, and even disputes. If it is not detected in time, it will cause the patient to be poisoned by excessive infusion of drugs, or even die. Even if it is discovered in time, it may have adverse effects such as medical disputes.

Contents of the invention

The purpose of the utility model is to provide a one-way luer connector with positive pressure control and a reasonable structure, which can effectively prevent the occurrence of excessive infusion of liquid medicine or blood backflow, and ensure the safety of infusion.

The technical solution of the utility model is:

A positive pressure-controlled unidirectional flow Luer connector, characterized in that it includes a unidirectional flow safety device that is sealed and connected to the rear Luer connector; the unidirectional flow safety device includes a The outer wall connected by the Luer connector, a blind tube is arranged inside the outer wall, the outer periphery of the blind tube is the inner cavity of the one-way flow safety device and the inner cavity of the Luer connector, the open end of the blind tube is the liquid medicine input port, and the rear part of the blind tube is on the circumference of the tube wall. Set a through hole communicating with the inner cavity of the Luer connector, and the outer surface of the tube wall from the end of the blind tube to the front of the through hole is in the form of a left and right plane connected with the arc surface; Elastic sleeve.

The utility model has a reasonable and simple structure, and two symmetrical small planes are opened at the end of the outer wall of the blind pipe of the one-way safety device. The clamping pressure of the elastic sleeve on the outer wall of the blind pipe is the smallest in the middle of the small plane along the direction parallel to the axis of the blind hole. As long as the width of the small plane is changed, the preset pressure can be easily changed to facilitate the use of different requirements. The one-way flow safety device is combined with the Luer connector, which can be connected to the end of the infusion line, which is convenient to use and ensures safety.

The one-way safety device can be used in other infusion devices, such as disposable infusion sets, to effectively prevent blood from flowing back and out. The one-way luer connector with positive pressure control is a typical embodiment, which is completely suitable for disposable infusion sets, and is especially suitable for the safety protection of drug infusion pumps. When the drug solution is infused, there is no drug solution or a small amount of drug solution at the front end of the Luer connector, and the pressure difference is not enough to open the elastic sleeve, the liquid channel is blocked, and the luer of the Luer connector is filled with liquid to the needle, which can overcome the problem. Venous pressure, preventing return of blood. Even if the medical staff is extremely busy or neglected for a while, the patient is in a sleeping state, the liquid medicine is infused, and the needle is not pulled out in time, it will not cause the patient's venous bleeding.

Description of drawings

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

Fig. 1 is a schematic structural view of an embodiment of the utility model.

Fig. 2 is a cross-sectional view along line A-A of Fig. 1 .

Detailed ways

A positive pressure-controlled one-way flow Luer connector, including a one-way flow safety device 1, which is in sealing connection with a rear Luer connector 3; the one-way flow safety device includes a Luer connector with Connected outer wall 7, a blind tube 6 is arranged inside the outer wall, the outer periphery of the blind tube is the inner cavity 8 of the one-way flow safety device and the luer connector inner cavity 9, the open end 10 of the blind tube is the liquid medicine input port, and the rear tube of the blind tube is A through hole 5 communicating with the inner cavity of the Luer connector is provided on the wall circumference, and the outer surface of the tube wall from the end of the blind tube to the front of the through hole is in the form of a left and right plane 4 connected to the arc surface; at the rear end of the blind tube The elastic sleeve 2 is installed before the through hole; the front end of the through hole of the blind pipe is slope-shaped, and the elastic sleeve extends to the slope.

When the hydraulic pressure in the blind leg of the one-way safety device is greater than the pressure in the inner cavity of the Luer connector, and the pressure difference does not reach the preset pressure, since the elastic sleeve is close to the outer wall of the blind leg of the one-way flow safety device, And cover the left and right planes, the liquid medicine cannot flow to the inner cavity of the Luer connector through the through hole; when the pressure difference is greater than the preset pressure, the liquid medicine will stretch the elastic sleeves that are close to the left and right planes through the through holes The tube flows into the luer of the Luer connector, and the normal infusion of the drug solution begins. The preset pressure can be adjusted by changing the size of the left and right planes 4 or by selecting the wall thickness (elasticity) of the elastic sleeve 2 . That is, the left and right planes 4 are wide, or the wall of the elastic sleeve 2 is thin, and the preset pressure is small; on the contrary, the left and right planes 4 are narrow, or the wall of the elastic sleeve 2 is thick, and the preset pressure is large. The preset pressure can be pre-set according to the clinical use of the injection pump, which can realize the flow of liquid medicine under pressure control and ensure that the injection pump is suspended higher than the patient's infusion end, even if the injection pump is out of control, it is guaranteed not to overdose Infusion of liquid medicine.

When the infusion device falls off accidentally, or the injection pump is out of control, so that the pressure in the infusion tube becomes smaller, and the hydraulic pressure in the blind leg 6 of the one-way safety device is less than or equal to the pressure in the inner cavity of the Luer connector 3, due to the tightness of the elastic sleeve 2 Paste the outer surface of the blind tube 6 of the one-way safety device 1 and cover the left and right planes 4, the liquid channel is blocked, and the liquid cannot flow back from the inner cavity of the Luer connector 3 into the blind tube 6 of the one-way safety device. Thereby, the one-way flow controlled by the forward pressure of the medicine liquid is realized, and the backflow of blood is effectively prevented.

Claims (1)

1. a way flow female Luer for positive pressure control, it is characterized in that: comprise way flow safety device, the female Luer at way flow safety device and rear portion is tightly connected; Described way flow safety device comprises the outer wall be connected with female Luer, in outer wall, blind pipe is set, blind pipe periphery is way flow safety device inner chamber and female Luer inner chamber, the opening of blind pipe is medicinal liquid input port, the rear portion tube wall of blind pipe circumferentially arranges the through hole communicated with female Luer inner chamber, and the outer surface of tube wall before blind pipe end to through hole, in the left and right plane form connected with arc surface; In blind pipe rear end to through hole protheca dress spring-backed quill.