Defective spinal needle

Unusual spinal needle defect: projecting stylet

“…Previous authors have described an unusual spinal needle mid-shaft micro-tear with resultant efflux of local anesthetic. 2 Another group reported a 180°malrotation of the stylet bevel so that it faced the needle and resulted in a forked tip, which prevented puncture of the skin. 3 We report an unusual spinal needle defect that pertains to an abnormal 6 mm projection of the stylet beyond the bevel in a disposable spinal needle.…”

Spinal Anaesthesia—The Current Trend towards Narrow Gauge Atraumatic (Pencil Point) Needles. Case Reports and Review

“…Other possible causes of inadequate block include inadequate dose, movement of the aperture out of the SAS during injection, loss of LA at the needle/hub interface, rare needle defects 80 , and anatomical anomalies of the dura such as spina bifida and dural septa or isolated dural pockets.…”

An unusual mid-shaft spinal needle defect detected accidentally

“…With extensive literature search, we got nearly similar article published in Anesthesia in 1991. [ 2 ] The letter was followed by an explanation from a medical unit of Becton Dickinson. The spinal needle is produced by pulling down a metal tube to the appropriate diameter.…”

“…The spinal needle is produced by pulling down a metal tube to the appropriate diameter. [ 2 ] The 26 G spinal needle is an extremely thin-walled needle. As far as needle bore size gets smaller the wall of the needle becomes thinner.…”

“…While preparing needle, presence of any small particle near needle surface can cause a nick in the needle. [ 2 ] Any small nick can cause this type of defect.…”