Hypodermic needle

A hypodermic needle is a hollow needle that is usually used with a syringe to inject substances into the body or extract liquids from it. They can also be used to collect fluid samples from the body, such as collecting blood from a vein during a venipuncture. Large-caliber subcutaneous interventional therapy is especially suitable for the treatment of catastrophic blood loss or shock.

Hypodermic needles also provide rapid delivery of fluids. It is also used when the injected substance cannot be taken orally, because it will not be absorbed, such as insulin, or because it can harm the liver.

Hypodermic needles also play an important role in research that requires sterile conditions. The hypodermic injection needle significantly reduces the contamination during the sterile substrate inoculation process in two ways. First, its surface is very smooth, preventing airborne pathogens from being trapped in the irregularities of the needle surface, and then these pathogens may be transferred to the medium as contaminants. Secondly, the needle tip is very sharp, which significantly reduces the diameter of the remaining pores after piercing the membrane, thereby preventing microorganisms larger than the pores from contaminating the substrate.

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