The core components include a flexible catheter/cannula that can be left in the blood vessel, and a stainless steel puncture guide needle core. Vein Detained Needle consists of a stainless steel core, a soft outer tube and a plastic needle seat.

Indwelling needles are divided into open and sealed types. The open type is divided into ordinary type and safe type (anti-needle stick injury type), and the closed type is divided into ordinary type and safe type (anti-needle stick injury type). When using intravenous catheters, aseptic technical procedures must be strictly followed.

Extended information

In 1962, the German company Braun invented the first indwelling needle "Braunüle". In the early 1980s, intravenous indwelling needles entered developed countries and regions in Asia; in the 1990s, open indwelling needles were the first to enter Chinese operating rooms. Since then, indwelling needles have been widely used in pediatrics because they can reduce the pain of multiple punctures compared with ordinary steel needles. , and gradually affected other departments in the inpatient ward.

The design of indwelling needles has gone through the process from the initial open type to the closed type, and from the ordinary type to the safe type that prevents needle stick injuries. The catheter material of the indwelling needle has also undergone changes from ordinary poly plastic to TEFLON to polyurethane (represented by BD Vialon).

The connectors of indwelling needles have also evolved from open indwelling needles without connectors to closed indwelling needles with connectors and heparin caps, and have progressed to needleless positive pressure connectors: mechanical valve needleless positive pressure connectors. Crimp fittings and diaphragm needleless fittings. The history of changes in indwelling needles is also the history of changes in its core components, including catheter materials, infusion connectors and functions to prevent blood exposure and needle stick injuries.

Baidu Encyclopedia - Indwelling intravenous needles

Baidu Encyclopedia-Indwelling Needle