1, coaxial needle: coaxial needle is a commonly used puncture needle, composed of blood collection needle and catheter, commonly used in blood collection, intravenous infusion and other operations. It is characterized by relatively simple operation and is suitable for general puncture operations such as routine venous blood collection.
2. Semi-automatic puncture needles: Semi-automatic puncture needles are a combination of automatic and manual operation, usually with an adjustable depth of entry and automatic withdrawal mechanism. Semi-automatic needles are suitable for operations that require more precise control of the depth of puncture, such as deep tissue puncture, bone marrow puncture, and so on.
3. Coaxial needles and semi-automatic needles are common medical devices that are used in different medical scenarios. They each have their own characteristics, and the choice of what is good depends on the specific needs of use and ease of operation.