Puncture needle assembly capable of continuously judging locations of tips of internal penetrating needle and external cannula

Abstract

The invention provides a puncture needle assembly capable of continuously judging locations of tips of an internal penetrating needle and an external cannula, which belongs to the field of medical appliances. By the aid of the blood return condition in a blood return observation tube of the puncture needle assembly, the locations of the tips of the internal penetrating steel needle and the external cannula are reflected and sufficient puncture and adjustment time is provided. The assembly comprises the internal penetrating steel needle with a blood return groove, the external cannula arranged on the periphery of the internal penetrating steel needle, an internal penetrating steel needle blood return sac arranged at the rear end of the internal penetrating steel needle, and an external cannula blood return sac arranged at the rear end of the external cannula, a blood return flow distributing structure which is realized by the aid of an opening is disposed on the external cannula blood return sac and is communicated with the blood return observation tube, and simultaneously, the tail end of the internal penetrating steel needle blood return sac is also communicated with the blood return observation tube. The puncture needle assembly realizes blood vessel puncture, does not change any original puncture operation methods, can be used for continuously observing the blood return condition in total processes of puncture and intubation, provides sufficient time to continuously judge the locations of the tips of the internal penetrating steel needle and the outer cannula, guarantees puncture intubation, and accordingly improves puncture intubation success ratio.

Description

technical field [0001] The invention belongs to the field of medical devices, and relates to a medical blood vessel puncture needle, in particular to a puncture needle set for continuously judging the tip positions of an inner puncture needle and an outer cannula. Background technique [0002] Vascular puncture needles are commonly used instruments in the medical field. Major surgery patients and some intensive care patients need arterial puncture and catheterization to monitor hemodynamic indicators; almost all surgical patients need venous puncture and catheterization to establish peripheral venous access. During this operation, a vascular puncture needle is used. [0003] The commonly used puncture needle will have a blood-returning exhaust plug on the blood-returning sac in which the steel needle is pierced, which can exhaust and stop the blood-returning. Due to the high blood pressure and the short total length of the blood return sac and the exhaust plug of the steel...

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Problems solved by technology

This not only increases the suffering of patients, but also causes a waste of medical resources, an...

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