süstlanõela

Süstlanõela, often translated as "syringe needle" or "hypodermic needle," is a hollow metal tube, usually made of stainless steel, with a sharp point at one end. It is a crucial component of a syringe, used for injecting substances into the body or withdrawing fluids from it. The needle's design is critical for its function. The sharp, beveled tip is engineered to penetrate the skin with minimal discomfort and damage. The hollow lumen allows for the passage of liquids and gases.

Needles come in various gauges and lengths, which are standardized measurements indicating the diameter of the needle bore and its overall length, respectively. A lower gauge number signifies a wider diameter, while a higher gauge number indicates a narrower diameter. The choice of needle gauge and length depends on the intended use, such as the viscosity of the fluid being injected, the depth of penetration required, and the patient's anatomy. For instance, intramuscular injections often require longer and wider needles than subcutaneous injections.

Sterilization is paramount for süstlanõela to prevent infection and disease transmission. They are typically supplied in sterile, individually sealed packaging. Once used, needles are considered sharps and must be disposed of safely in designated puncture-resistant containers to avoid accidental injury. Modern süstlanõela may also feature special coatings to reduce friction and improve patient comfort during insertion. They are indispensable tools in medicine, veterinary science, and research laboratories.