needle used for spinal tap
A spinal tap needle, also known as a lumbar puncture needle, is a specialized medical instrument designed for accessing the subarachnoid space to collect cerebrospinal fluid or deliver medications. These needles feature precise engineering with specific characteristics that enable safe and effective procedures. The standard spinal needle consists of a hollow core with a specially designed tip that minimizes tissue trauma during insertion. Modern spinal tap needles typically range from 20 to 25 gauge in diameter and 3.5 to 5 inches in length, allowing for optimal access to the spinal canal. The needle's construction incorporates high-grade stainless steel for durability and biocompatibility, with a polished surface to reduce friction during insertion. A key feature is the pencil-point or Quincke-type tip design, which helps prevent post-dural puncture headaches by minimizing CSF leakage. The hub of the needle includes clear markings for depth measurement and orientation, ensuring precise placement during procedures. Advanced models may include ergonomic handles for improved control and integrated safety features to prevent needlestick injuries. These needles undergo rigorous quality control to maintain sterility and structural integrity, making them essential tools in diagnostic and therapeutic spinal procedures.