Lesser P, Bembridge M, Lyons G, Macdonald R
Halifax Royal Infirmary.
Anaesthesia. 1990 Sep;45(9):767-8. doi: 10.1111/j.1365-2044.1990.tb14451.x.
A 30-gauge spinal needle was evaluated for Caesarean section, using a combined epidural/spinal technique, in 50 mothers. Spinal anaesthesia failed in six mothers and was inadequate in another six. General anaesthesia was required on one occasion. A 25% overall failure rate suggests that a 30-gauge needle is not a practical proposition for routine clinical practice.