Labor Epidural Analgesia to Cesarean Section Anesthetic Conversion Failure: A National Survey

Table 4

Dose of intrathecal local anesthetic which would be used, compared to that used in their routine clinical practice, by respondents who selected to perform a combined spinal-epidural or spinal as their usual next management step after a top up of an existing labor epidural had resulted in an inadequate or failed sensory block for a category-two cesarean section.

Dose of intrathecal local anesthetic	No objective sensory block ()	Bilateral T10 sensory block ()	Unilateral T6 sensory block ()	value (no objective sensory block vs bilateral T10 sensory block)	value (no objective sensory block vs unilateral T6 sensory block)
Normal	317 (52.5)	66 (12.7)	68 (16.6)	<0.001	<0.001
75 to <100% of normal	206 (34.1)	188 (36.2)	134 (32.8)	0.39	0.75
50 to <75% of normal	70 (11.6)	213 (41.0)	150 (36.7)	<0.001	<0.001
25 to <50% of normal	3 (0.5)	43 (8.3)	45 (11.0)	<0.001	<0.001
<25% of normal	0 (0)	2 (0.4)	6 (1.5)	0.13	0.003
Other	8 (1.3)	8 (1.5)	6 (1.5)	0.75	0.83

Data are presented as number (%).