Intravenous catheter setting device with back-suction force

Abstract

The invention relates to a vein inner duct setting device having the pumping back force, which comprises a syringe, a needle group and a push rod. The needle group has a locating piece positioned in the syringe, a needle seat limited between the locating piece and the syringe, a needle body threading through the syringe, a duct seat nested on the syringe, and a pliability duct associated with the duct seat and for the threading out of the needle body. The push rod has an air port communicated with the air pressure outside, and a startup piece can be nested with the needle seat for combination, the startup piece has a flow way communicating the syringe and the air port. thereby, when the air port is sealed, the inside of the syringe can maintain the close state, so the operation of blood inducing can be conducted, when the air port is open, the backstreaming blood can flow into the flow way of the startup piece, and thereby the startup piece is started to continuously drive the motion of the needle seat and the needle body to be hidden in the push rod. The invention provides the vein inner duct setting device having the pumping back force that can avoid the seepage of blood when meeting misoperations, so the invention is fit for the actual practice.

Description

technical field [0001] The invention relates to an intravenous catheter setter, in particular to a needle body that can be concealed and has a retracting force, which can control the opening and closing of the air port, has the function of sampling and measuring backflow blood, and can be used when the needle body is concealed. The venous catheter setter with retracting force can achieve simple, fast and safe medical operations, so that the returning blood can flow into the flow channel of the activation member without leaking outward. Background technique [0002] In general clinical medical treatment, when administering intravascular infusion drip injection to patients, the intravascular infusion catheter is often used to continuously infuse drip infusion. Please refer to Figure 1, which is a sectional view of a general existing intravenous catheter setter. Taking the general catheter setter 9 as an example, it mainly includes a needle base 91, a catheter base 92 sleeved w...

AI Technical Summary

Problems solved by technology

[0005] However, the inventor of this case is not satisfied with this, and still upholds the spirit of excellence, and continues to engage in the development and research related to the catheter setter, so he found that when the original invention withdraws the needle body, it will return the original to the syringe The blood in the syringe is pushed out of the syringe, but there are still doubts about the blood polluting the environment or personnel

[0006] This shows that the above-mentioned exi

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