The spinal needle is a kind of aseptic puncture needle, which can be used for human puncture and spinal anaesthesia. Its basic functions are suction and injection, and it is applied in diagnosis and treatment.

1. Functional characteristics of the spinal needle

• The needle tip is sharp, and the needle, which has many spinal needle sizes, enters smoothly with good linearity, so as to improve the accuracy of puncture and reduce damage.

• The surface of the inner wall of the needle cavity not only has good uniformity and surface sliding, but also has smooth suction and injection. It has been widely recognized in the field of implanted particles for tumour treatment. 

• The spinal needle can provide a clear visual field under echo and reflection monitoring.

• It is clinically reflected that the needles are well-visualized, which can improve the puncture accuracy and therapeutic effect.

• It has good materials, making its hardness meet the needs of clinical puncture.

2. Advantages of the spinal needle

• The needle tip has been treated by laser.

• The smooth but moderate penetration resistance of the spinal needle tip makes it easy to identify the tissue layer it penetrates.

• The thin-walled needle cavity with a large body, the surface of the needle cavity with special treatment and the very small resistance of the liquid passing through without friction scraps, is conducive to the smooth passage of the liquid.

• The dimensions of fit tolerance between the core needle and the trocar are precise, which not only increase the strength of the needle, but also make the inner and outer needles move relatively smoothly, with little friction and no tiny friction scraps.