Venous blood collecting needle

Abstract

The invention provides a venous blood collecting needle. The venous blood collecting needle comprises a blood collecting needle tube, a blood collecting needle tube seat and a blood feeding needle tube, wherein an inner cavity of the blood feeding needle tube is communicated with an inner cavity of the blood collecting needle tube seat. The venous blood collecting needle is characterized in that aflexible sleeve is sleeved outside the blood collecting needle tube, the top end of the sleeve is coated with the tip of the blood collecting needle tube, the bottom end of the sleeve is connected with a sleeve seat, and the sleeve seat is sleeved outside the blood collecting needle tube; the sleeve seat is connected with a sleeve seat handle, and the sleeve seat handle is provided with a contactpart; an elastic part is arranged between the sleeve seat and the blood collecting needle tube seat; when an external force is applied to the sleeve seat through the sleeve seat handle to drive the sleeve seat to move toward a direction approaching the blood collecting needle tube seat and force the elastic part to deform, the tip of the blood collecting needle tube is exposed from the top end ofthe sleeve; the contact part of the sleeve seat handle is pressed and fixed to the surface of the blood collecting needle tube seat to ensure that the elastic part cannot be restored; and after the tip of the blood collecting needle tube enters a vein, reducing the pressing force of a finger on the sleeve seat handle can force the sleeve seat to move away from the blood collecting needle tube seat, and finally the top end of the sleeve is coated with tip of the blood collecting needle tube.

Description

technical field [0001] The invention relates to a venous blood collection needle, which belongs to the technical field of medical instruments. Background technique [0002] Venipuncture and related venous blood collection are the most commonly used general techniques in clinical departments. The most commonly used blood collection needles include a blood collection needle tube for puncturing the skin and vein wall, and a blood collection needle tube holder for fixing the blood collection needle tube inside. 1. A blood delivery needle tube; the inner cavity of the blood delivery needle tube is connected with the inner cavity of the blood collection needle tube seat directly or through the inner cavity of the delivery hose; a rubber sleeve is conformally sleeved outside the blood delivery needle tube, and the rubber sleeve isolates the blood delivery needle tube from the external fluid ;When the blood collection needle tube enters the vein, the blood delivery needle tube needs...

AI Technical Summary

Problems solved by technology

[0010] 1. When you see blood returning, the sharp tip of the blood collection needle runs through the vein when you continue to insert the needle, resulting in puncture failure

[0011] 2. The venous pressure-dependent passive blood return method makes it difficult to see the blood return when the patient's venous pressure is low or other related conditions, and the tip of the blood collection needle that has entered the venous lumen continues to advance through the vein wall, resulting in puncture failure

[0012] 3. Because the index finger under the blood collection needle holder will inevitably come into contact with the skin adjacent to the puncture point just after disinfection, when there are microorganisms on the index finger, it is very easy to contaminate the puncture point and cause pipeline-related bloodstream infection (CRBSI )

[0013] 4. Because the index finger located under the blood collection needle tube holder during operation will affect the selection of the needle insertion angle, that is, the angle between the blood collection needle tube and the skin, reducing the success rate of puncture

[0015] 6. The blood is sucked into the inner cavity of the blood collection needle in a rapid and turbulent flow from the sharp and rough edge of the blood collection needle with a rigid surface under the microscopic size, which will lead to the destruction of a large number of blood cells, especially red blood cells.

[0016] 7. Blood flows into the inner cavity of the vacuum blood collection tube in a rapid turbulent jet from the sharp and rough edge of the blood delivery needle with a rigid surface at a microscopic scale, which will cause the destruction of a large number of blood cells, especially red blood cells.

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