Bloodletting needle, bloodletting needle system and bloodletting method

Abstract

A bloodletting needle comprises a hollow needle that can be placed subcutaneously; a blood storage container that is communicated with the hollow needle; and an extraction opening that is connected with the blood storage container, and is unidirectional. The extraction opening is opened and air is extracted during air extraction, and the extraction opening is automatically sealed when air extraction is stopped, so that the air pressure in the blood storage container can be kept to be lower than the external low-pressure state. According to the bloodletting needle, a bloodletting system and a bloodletting method, a cupping technology is combined with the hollow needle, the blood storage container and the extraction opening, so that the safe and depth-controllable bloodletting of various muscles including large muscles is achieved.

Description

technical field [0001] The present invention generally relates to a needle tool for purging blood under the skin, a blood purging needle and a blood purging method. Background technique [0002] Bloodletting therapy has a long history. As early as more than 2,000 years ago, in the book "Emperor's Internal Classic", there is a record of pricking and bloodletting. In the West, the lancet, a famous American medical impurity, also originated from bloodletting therapy. Bloodletting therapy can improve local blood circulation and repair tissue structure by removing congestion in a certain local tissue, so that new blood can flow into the site. Pricking and bloodletting generally use a three-edged needle or lancet to puncture the skin and drain blood from the capillaries. Figure 1A The shape of the lancet is shown. Figure 1B The shape of the triangular needle is shown. The needle tip of the lancet and the three-edged needle is a solid needle, generally only a few millimeters ...

AI Technical Summary

Problems solved by technology

However, since the syringe piston and the syringe are airtight, when drawing blood, the medical staff needs to pull up the piston to increase the effective volume in the syringe, thereby generating low pressure to draw blood.

Therefore, during the blood drawing process, the medical staff generally need to keep pulling the syringe piston, otherwise the atmospheric pressure outside the syringe is higher than the low pressure inside the syringe, which will cause the syringe piston to be pushed back to a low position by the atmospheric pressure, which is not conducive to blood drawing

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