Adjustable arteriovenous puncture needle, and indwelling cannula and external protective jacket matched therewith

Abstract

The invention discloses an adjustable arteriovenous puncture needle, and an indwelling cannula and an external protective jacket matched therewith. The adjustable arteriovenous puncture needle comprises a needle body, a needle core and a lead wire, wherein the tail end of the needle core is fixedly arranged on the needle body, at least one rail which is matched with the needle core in length and limits the radial motion and axial rotation of the lead wire is arranged on the needle core along the direction of the needle core, the lead wire is arranged in the rail and made from shape memory alloy, the lead wire does not extend out of the rail at initial state, a handle convenient to drive the lead wire to move and extend out of the rail is fixedly arranged on the lead wire, the lead wire is at natural state after extending out of the rail, an included angle is formed between the lead wire at the natural state and the extension direction of the head end of the needle core, the needle core is inserted into blood vessel by fixed angle through the included angle, and the lead wire is in parallel to the blood vessel at natural state. The adjustable arteriovenous puncture needle is simple in structure, convenient to operate, large in application range, convenient and reliable, easy to popularize and great in practical values.

Description

technical field [0001] The invention relates to an adjustable arteriovenous puncture needle, an indwelling sleeve and an outer protective sheath matched with it. Background technique [0002] In clinical work, arteriovenous puncture and catheterization are often required in order to perform intravenous infusion, arterial invasive blood pressure monitoring and other diagnostic and therapeutic operations on patients. However, for some parts with thicker subcutaneous tissue and deeper blood vessels, traditional puncture needles After the puncture into the blood vessel, it is difficult to adjust the angle to be parallel to the blood vessel, so the blood vessel is often punctured when the indwelling sleeve is pushed, resulting in the failure of the indwelling sleeve, resulting in the need for multiple punctures to complete the indwelling sleeve, which aggravates the pain of the patient . Contents of the invention [0003] Aiming at the deficiencies of the prior art, the presen...

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Problems solved by technology

[0002] In clinical work, arteriovenous puncture and catheterization are often required in order to perform intravenous infusion, arterial invasive blood pressure monitoring and other diagnostic and therapeutic operations on patients. After puncture into the blood vessel, it is difficult to adjust the angle to be parallel to the blood vessel, so the blood vessel is often punctured when the indwelling sleeve is pushed, resulting in the failure of the indwelling sleeve, resulting in the need for multiple punctures to complete the indwelling sleeve, which aggravates the pain of the patient

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