Intravenous catheter setter capable of drawing and detecting backflow blood

Abstract

An intravenous catheter setter capable of drawing and detecting backflow blood mainly comprises a drawing and detecting unit with a suction effect and a needle assembly. The needle assembly is provided with a needle, a catheter seat and a flexible catheter, wherein the needle is communicated with the drawing and detecting unit, the catheter seat is detachably connected with the drawing and detecting unit, the flexible catheter is connected with the catheter seat, the needle penetrates out of the flexible catheter, accordingly the drawing and detecting unit can draw, detect and display backflow blood in a blood vessel, and after the needle is extracted away from the catheter, the flexible catheter is remained the blood vessel. In addition, the intravenous catheter setter capable of drawing and detecting backflow blood comprises a tube and a needle extracting-back unit capable of backwards extracting the needle so that the needle is hidden in the tube, and accordingly service safety is improved.

Description

[0001] This application is a divisional application of an invention patent application with an application date of April 20, 2006, an application number of 200610074627.7, and an invention title of "Intravenous catheter setter capable of drawing and measuring blood return". 【Technical field】 [0002] The invention relates to an intravenous catheter setter, in particular to an intravenous catheter setter which can be used for setting an intravascular infusion catheter and can draw back blood. 【Background technique】 [0003] In general clinical medicine, when patients are given intravascular infusion drip injection, the infusion catheter set in the blood vessel is often used to continuously infuse the drip infusion, refer to figure 1 , the intravenous injection guide 10 mainly includes a needle base 101, a catheter base 102 sleeved with the needle base 101, a hollow and flexible catheter 103 connected with the catheter base 102, and a tube 103 connected with the needle base 101...

AI Technical Summary

Problems solved by technology

[0006] 1. See figure 2 After the needle body 104 guides the catheter 103 into the blood vessel, blood can leak into the gap between the catheter 103 and the needle body 104 through a through hole 105, so as to achieve the function of bleeding, so as to inform the medical staff The needle body 104 and the catheter 103 have been correctly inserted in the blood vessel, but the technical means of setting the through hole 105 on the needle body 104 is easy to bend the thin needle body 104. Furthermore, if the operation When the whole section of the needle body 104 and the catheter 103 is submerged in the subcutaneous tissue or blood vessel, the function of bleeding will be lost.

[0007] 2. It is important that most emergency patients or critically ill patients need to establish an intravenous infusion line and draw blood for testing before starting subsequent drug or surgical treatment. Therefore, since the syringe does not have the function of drawing blood and the needle body 104 is quite pointed, and fits with this catheter 103, so, when patient's blood pressure is not enough to make blood seep out from this through hole 105 (as emergency patient, elderly or pediatric patient), or patient's target blood vessel is not clear and If exploratory puncture is required (such as obese, elderly or female patients), it is impossible to quickly determine whether the needle body 104 and the catheter 103 are correctly inserted into the blood vessel, and the puncture has to be repeated, which makes the operation time-consuming and troublesome. Difficulties in obtaining prime time for medical operations, especially emergency patients, or making patients feel pain and discomfort

[0008] 3. In order to make the operation smooth, the medical staff often collect and process the needle body 104 and the work object separately after the blood drawing or infusion pipeline connection operation is completed, so that the needle body 104 cannot be exposed to the outside, so , as long as there is a little carelessness, there will be a risk of stabbing the medical staff, causing pain or even the risk of fatal infectious disease infection

In order to improve the lack of exposure of the needle body 104, there is another intravenous syringe on the market that can retract and hide the needle body 104. However, the intravenous syringe that can withdraw the needle body 104 is often complicated due to the structure and the Without the function of sampling and measuring the return blood, there are still the problems mentioned in the second point above, and even more inconvenient in operation than the general intravenous catheter guide device 10, so, on October 19, 2004, a letter from the American Medical Association The open letter of the meeting clearly requested manufacturers not to stop the manufacture of general IV introducers 10

Apparently, when the general intravenous injection guide device 10 and the intravenous syringe with retractable needle body 104 are used, there is a lack of both safety and operational convenience.

Images