Spinal Needles  are commercially available in an array of sizes (16-30 gauge), lengths, bevel and tip designs. All should have a tightly fitting removable stylet. Broadly, they can be devided into either sharp (cutting)-tipped or blunt-tipped Needle. The Quincke Needle  is a cutting needle with end injection. The introduction of blunt tip (pencil-point) needle has markedly decreased the incidence of postdural puncture headache; in general the smaller the gauge needle the lower the incidence of headache. The Whitacre and pencil-point Needle have rounded points and side injection. The Sprotte is a side-injection needle with a long opening. It has advantage of more vigorous CSF flow compared with similar gauge needle. However, this can lead to a falied block if the distal part of the opening is subarachnoid, the proximal part of is not past the dura, and the full dose of medication is not delivered.

Why Spinal Catheters are no longer in use. Very small subarachnoid catheters are currently no longer approved by the U.S. Food and Drug Administration (FDA). The withdrawal of these catheters was prompted by their association with cauda equina syndrome. Larger catheres designed for Epidural use are associated with relatively high complication rates when placed subarachnoid.