Tee-joint negative pressure conduction device for novel disposable automatic cut-off vein infusion set

Abstract

The invention provides a tee-joint negative pressure conduction device for a novel disposable automatic cut-off vein infusion set. The tee-joint negative pressure conduction device is installed between a Murphy pipe and a lower infusion pipe of the infusion set. In the process of infusion, the tee-joint negative pressure conduction device has the functions of relatively separating a tee-joint longitudinal pipe from a tee-joint transversal pipe to prevent liquid medicine in the infusion pipe from being polluted by air through contaction and enabling the tee-joint longitudinal pipe to be relatively communicated with the tee-joint transversal pipe to convert the pressure of the internal liquid medicine into the air pressure. The tee-joint transversal pipe can be connected with an external system so that the negative pressure inside the vein infusion set can be further utilized. The tee-joint negative pressure conduction device is simple in structure, reasonable in design, high in manufacturability and assembling production efficiency, low in manufacturing cost and stable and reliable in working effect.

Description

technical field [0001] The invention relates to a new three-way negative pressure conduction device for an automatic cut-off intravenous infusion set, in particular to a three-way negative pressure conduction device that does not pollute the liquid medicine in the infusion set and can accurately conduct pressure changes in the tube of the infusion set at the end of the infusion . Background technique [0002] At present, there are many domestic manufacturers of disposable venous infusion sets used in intravenous infusion care, and their product structures are similar, and none of them have a three-way negative pressure conduction device and its functions; during the decades of invention and use of disposable venous infusion sets , there are about thousands of patents related to the improvement of infusion sets, and most of them are around the functional improvements of cut-off, anti-blood return, alarm, anti-bubble, anti-rolling needle, etc.; these are enough to show tha...

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Problems solved by technology

[0004] In summary, the inventor believes that a single improvement of the infusion set or a single method relying on electronic technology cannot fully solve the problems existing in the intravenous infusion and meet the increasing requirements for infusion care; only by combining the two, the infusion The defects and shortcomings of the device itself have been improved and perfected, so that it not only has the function of automatic cut-off, anti-bubble and anti-blood return, but also facilitates the application of electronic technology. The modern management of infusion is undoubtedly the best choice; the three-way negative pressure conduction device is just the bridge and link to combine these two types of technologies, so it is very important to develop and provide a new, simpler and more practical three-way negative pressure conduction technology. necessary

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