New type accurate regulating device for venous transfusion

Abstract

The invention provides a new type accurate regulating device for venous transfusion. The new type accurate regulating device consists of an upper catheter, a reserved tube cap, a reserved tube, a regulating nut, a valve seat hole, a valve seat, a zigzag tube wall, regulating threads, a valve core, a guide support, a Murphy tube and a lower catheter, and is characterized in that the zigzag tube wall of the Murphy tube can be elongated or compressed under the screwing action of the regulating nut and the regulating threads, and drive the valve core in the Murphy tube to move; with the change of the valve core in position on the axis of the lower catheter, the through-flow area of the lower catheter is changed; therefore, the accurate regulation on transfusion velocity is realized; the lower part of the lower catheter is of a U-shaped elbow structure, so that the air can be prevented from entering a transfusion tube, and the transfusion can be automatically stopped. The device has the characteristics of accuracy in dropping speed regulation, automatic exhaust, automatic transfusion stop and the like.

Description

technical field [0001] The invention relates to a medical device, in particular to a precise adjustment device for a disposable infusion set for intravenous infusion. Background technique [0002] At present, when medical personnel are doing injection therapy for wounded and sick patients, they usually use manual timing counting method to adjust the drip rate. It is unscientific and unsafe to use this method to control the drip rate. In daily life, it often occurs that the infusion rate is too fast due to the patient's own adjustment of the drip rate, or the infusion is not processed in time after the infusion is completed, the infusion blockage, etc., resulting in serious consequences. In the form of inclined rollers, its structure is simple and the manufacturing cost is low. However, during the use of this infusion regulator, it is easy to cause deformation of the infusion tube, displacement of the roller, slipping, etc., resulting in changes in drip speed, and the adjustm...

AI Technical Summary

Problems solved by technology

[0002] At present, when medical staff give injection therapy to wounded and sick patients, they usually use manual timing counting method to adjust the drip rate. Using this method to control the drip rate is neither scientific nor safe.

In daily life, it often occurs that the infusion rate is too fast due to the patient's own adjustment of the drip rate, or the infusion is not processed in time after the infusion is completed, the infusion blockage, etc., resulting in serious consequences. In the form of inclined rollers, its structure is simple and the manufacturing cost is low. However, during the use of this infusion regulator, it is easy to cause deformation of the infusion tube, displacement of the roller, slipping, etc., resulting in changes in drip speed, and the adjustment wheel is not easy to fix stably. Location

[0003] Patents ZL01237697.3, ZL01262600.7 and ZL200520070218 all use the photoelectric principle to collect drip speed signals, and then display them after digital-to-analog conversion, but they can only count and cannot automatically adjust the drip speed, and the installation and use of the device have certain environmental regulation requirements

[0004] Patents ZL03213959.4, ZL00267516.1, ZL00136881.8, and ZL00266528.X all use sensors to measure and display the number of drops, and the motor drives the control mechanism to adjust the flow rate. The system is complicated and the cost is high

[0005] Patent ZL200420053860.3 proposes an improved intravenous infusion speed adjustment switch, which can prevent the automatic slipping of the adjustment wheel, but the drip speed cannot be displayed and the flow control is inaccurate

[0006] Patent ZL98200544.X proposes a device for manually operating a plunger pump to control the pressure plate to squeeze the infusion tube to adjust the flow rate. This device has high requirements for operating technology and also requires manual counting and flow measurement.

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