<P> Spinal anaesthesia ( or spinal anesthesia ) , also called spinal block , subarachnoid block , intradural block and intrathecal block , is a form of regional anaesthesia involving the injection of a local anaesthetic into the subarachnoid space , generally through a fine needle , usually 9 cm ( 3.5 in ) long . For 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 and others ) . </P>
<P> Spinal anaesthesia ( or spinal anesthesia ) , also called spinal block , subarachnoid block , intradural block and intrathecal block , is a form of regional anaesthesia involving the injection of a local anaesthetic into the subarachnoid space , generally through a fine needle , usually 9 cm ( 3.5 in ) long . For 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 and others ) . </P>
how big is the needle for a spinal block
how big is the needle for a spinal block
9 cm ( 3.5 in ) long
9 cm ( 3.5 in ) long