CN104623796A - Forward pressure control unidirectional flow Luer connector - Google Patents

Abstract

The invention discloses a forward pressure control unidirectional flow Luer connector which comprises a unidirectional flow safety device. The unidirectional flow safety device is connected with a rear Luer connector body in a sealed manner. The unidirectional flow safety device comprises an outer wall connected with the Luer connector body. A blind tube is arranged in the outer wall. A unidirectional flow safety device inner cavity and a Luer connector inner cavity are arranged on the periphery of the blind tube. The open end of the blind tube is a liquid medicine input port. A through hole communicated with the Luer connector inner cavity is formed in the periphery of the rear tube wall of the blind tube. The tube wall outer surface from the tail end of the blind tube to the through hole is in forms of left plane and right plane which are connected with an arc-shaped face. An elastic sleeve sleeves the part from the rear end of blind tube to the through hole. The forward pressure control unidirectional flow Luer connector is reasonable in structure, capable of effectively preventing excessive liquid medicine infusion or blood backflow, and capable of guaranteeing infusion safety.

Description

The way flow female Luer that positive pressure controls

Technical field

The present invention relates to a kind of female Luer.

Background technology

Along with the development of medical science, killer injecting pump is more and more general in clinical practice, and the use amount of killer injecting pump is also increasing.Because killer injecting pump is when installing incorrectly or break down, killer injecting pump is with regard to possibility transfusion speed out of hand or the function preventing backflow of blood.Diminish because a variety of causes there will be transfusion overpressure in infusion process, cause venous backflow to arrive in infusion pipeline.When draining blood is too much or overlong time, blood easily condenses in infusion pipeline, infusion pipeline is caused to block, transfusion liquid is not smooth, particularly killer injecting pump loses transfusion speed controlling functions, and killer injecting pump holds use higher than patient fluid infusion, just may cause the risk of excessive transfusion, cause patient to be discontented with, even dispute occurs.If find not in time, patient's Superfusion medicine and poisoning can be caused, even dead serious consequence.Even if find in time, also may produce the harmful effects such as medical tangle.

Summary of the invention

The object of the present invention is to provide a kind of rational in infrastructure, effectively can prevent the generation of Superfusion medicinal liquid or backflow of blood problem, ensure the way flow female Luer that the positive pressure of infusion safety controls.

Technical solution of the present invention is:

The way flow female Luer that positive pressure controls, 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;

Hydraulic pressure in the blind pipe of non-return finger is greater than the pressure in female Luer inner chamber, when its pressure reduction does not reach preset pressure, the outer wall of the blind pipe of way flow safety device is close to due to spring-backed quill, and covering left and right plane, medicinal liquid does not flow to the inner chamber of female Luer by through hole; When pressure reduction is greater than preset pressure, then medicinal liquid struts the spring-backed quill be close in left and right plane by through hole, flows to female Luer inner chamber, starts normal infuse medical fluid.

The position, through hole front end of blind pipe is ramped shaped, and spring-backed quill extends to position, slope.

The present invention is rational in infrastructure, simple, outputs two symmetrical facets at non-return finger blind pipe outer wall end.Spring-backed quill, to the banding pressure of blind pipe outer wall, prolongs that to be parallel to blind hole axis direction minimum in the middle of the facet, as long as change faceted width, is just easy to change preset pressure, is convenient to the different use required.Way flow safety device can be connected to infusion pipeline end together with combining with female Luer, easy to use, guarantees safety again.

Non-return finger can be used for other infusion sets, as disposable transfusion device, effectively prevents backflow of blood and puts outward.The way flow female Luer that positive pressure controls is wherein exemplary embodiments, is applicable to disposable transfusion device completely, is specially adapted to the safeguard protection of killer injecting pump infuse medical fluid.When medicinal liquid is totally lost, female Luer front end is without medicinal liquid or have a small amount of medicinal liquid, and when its pressure reduction is not enough to strut spring-backed quill, fluid passage is blocked, and is full of liquid between female Luer inner chamber to syringe needle, can overcome venous pressure, stops blood back.Be exactly that medical worker spy hurries or inadvertent, patient is in sleep state again, and medicinal liquid is totally lost, and syringe needle fails to extract in time, also can not cause patient's venous hemorrhage.

Accompanying drawing explanation

Below in conjunction with drawings and Examples, the invention will be further described.

Fig. 1 is the structural representation of one embodiment of the invention.

Fig. 2 is the A-A profile of Fig. 1.

Detailed description of the invention

The way flow female Luer that positive pressure controls, comprise way flow safety device 1, the female Luer 3 at way flow safety device and rear portion is tightly connected; Described way flow safety device comprises the outer wall 7 be connected with female Luer, blind pipe 6 is set in outer wall, blind pipe periphery is way flow safety device inner chamber 8 and female Luer inner chamber 9, the opening 10 of blind pipe is medicinal liquid input port, the rear portion tube wall of blind pipe circumferentially arranges the through hole 5 communicated with female Luer inner chamber, and the outer surface of tube wall before blind pipe end to through hole, in left and right plane 4 form connected with arc surface; In blind pipe rear end to through hole protheca dress spring-backed quill 2; The position, through hole front end of blind pipe is ramped shaped, and spring-backed quill extends to position, slope.

Hydraulic pressure in the blind pipe of non-return finger is greater than the pressure in female Luer inner chamber, when its pressure reduction does not reach preset pressure, the outer wall of the blind pipe of way flow safety device is close to due to spring-backed quill, and covering left and right plane, medicinal liquid does not flow to the inner chamber of female Luer by through hole; When pressure reduction is greater than preset pressure, then medicinal liquid struts the spring-backed quill be close in left and right plane by through hole, flows to female Luer inner chamber, starts normal infuse medical fluid.Its preset pressure by changing the size of left and right plane 4, or selects the wall thickness (elasticity) of spring-backed quill 2, adjusts the size of preset pressure.Namely left and right plane 4 is wide, or spring-backed quill 2 wall is thin, and preset pressure is little; Otherwise left and right plane 4 is narrow, or spring-backed quill 2 wall thickness, then preset pressure is large.Preset pressure according to killer injecting pump infective use, can preset, and can realize the liquid medicine flow under Stress control, guarantees to hang up higher than patient fluid infusion's end at killer injecting pump, even if killer injecting pump is out of control, also ensureing can not Superfusion medicinal liquid.

When infusion set accidental, or killer injecting pump is out of control, transfusion overpressure is caused to diminish, when hydraulic pressure in non-return finger blind pipe 6 is less than or equal to the pressure in female Luer 3 inner chamber, the outer surface of the blind pipe 6 of way flow safety device 1 is close to due to spring-backed quill 2, and cover left and right plane 4, fluid passage is blocked, liquid can not from the inner chamber of female Luer 3, flow back in non-return finger blind pipe 6, thus achieve the one-way flow of medicinal liquid positive pressure control, effectively prevent backflow of blood.

Claims (2)

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;

Hydraulic pressure in the blind pipe of non-return finger is greater than the pressure in female Luer inner chamber, when its pressure reduction does not reach preset pressure, the outer wall of the blind pipe of way flow safety device is close to due to spring-backed quill, and covering left and right plane, medicinal liquid does not flow to the inner chamber of female Luer by through hole; When pressure reduction is greater than preset pressure, then medicinal liquid struts the spring-backed quill be close in left and right plane by through hole, flows to female Luer inner chamber, starts normal infuse medical fluid.

2. the way flow female Luer of positive pressure control according to claim 1, is characterized in that: the position, through hole front end of blind pipe is ramped shaped, and spring-backed quill extends to position, slope.