====== Spinal anesthesia ======

[[Epidural anesthesia]].

====Subarachnoid anesthesia====

Spinal [[anesthesia]] (or spinal anesthesia), also called [[spinal]] analgesia, spinal block or subarachnoid block (SAB), is a form of [[regional anesthesia]] involving injection of a [[local anesthesia]] into the [[subarachnoid space]], generally through a fine needle, usually 9 cm long (3.5 inches). For extremely obese patients longer needles are available (12.7 cm / 5 inches). The tip of the spinal needle has a point or small bevel. Recently, pencil point needles have been made available (Whitacre, Sprotte, Gertie Marx & others).

Spinal anesthesia is widely used for many obstetric, gynecological, orthopedic, and urological operations. 

===== Spinal anesthesia for lumbar spine surgery =====

see [[Spinal anesthesia for lumbar spine surgery]].

====Complications====
[[Subdural hematoma]]s 

[[Postdural puncture headache]]