Double-channel needle-free injection device and method with controllable jet velocity

Abstract

The invention discloses a double-channel type needle-free injection device and method with controllable jet velocity. The device includes a start switch, a power source, a liquid cavity, a two-position three-way electromagnetic reversing valve, an infusion tube and a hose; the liquid cavity It is used to store liquid medicine. The inlet and outlet of the liquid chamber are respectively connected to the power source and the inlet port of the two-position three-way electromagnetic reversing valve, and the two outlets of the two-position three-way electromagnetic reversing valve are connected to the inlets of the infusion tube and the hose Connection, the infusion tube is a rigid tube with a nozzle at the outlet, the hose outlet is connected to the front of the infusion tube, the power source is used to push the piston in the liquid chamber to provide power for the injection, and the power source can set the power according to the required jet velocity , the control end of the two-position three-way electromagnetic reversing valve is connected with a time-delay relay, and the start switch is connected with the power source and the time-delay relay respectively. The invention can improve the utilization rate of the medicinal liquid and reduce the risk of injection.

Description

technical field [0001] The invention belongs to the field of medical devices, and in particular relates to a dual-channel needle-free injection device and method with controllable jet velocity. Background technique [0002] The working principle of needle-free injection is to use a high-pressure jet to penetrate the skin and reach the subcutaneous level. When injecting, the high-speed jet first penetrates the skin to form a hole, and then the liquid medicine diffuses in the skin through the hole; in the stage of forming the hole, the jet with a relatively high speed needs to impact the skin, deforming, destroying the skin, and forming a hole. As the jet velocity increases, the degree of splashing and atomization of the liquid medicine increases, and the depth of the hole increases; in the stage of liquid medicine diffusion, maintaining a large jet velocity will cause excessive pressure on the tissue, and even stimulate the patient's nerve endings, resulting in severe pain or...

AI Technical Summary

Problems solved by technology

[0003] The injection time of the current needle-free syringe is extremely short. In order to ensure the success rate of the injection, the jet velocity is mostly kept at the speed required to pierce the skin, causing the splash and atomization of the liquid medicine while increasing the stimulation intensity of the painful nerve and tissue risk of sabotage

Images