Bilateral transversus abdominis plane (TAP) block with 24 hours ropivacaine infusion via TAP catheters: A randomized trial in healthy volunteers

Table 1 Dermatomes involved in TAP blockade

	Active	Placebo
Number of dermatomes involved at 24 h
Pin Prick	1.5 (0–3)	0 (0–0)	P=0.039
Heat/Cold	2.0 (0–3)	0 (0–0)	P=0.034
Upper and lower dermatomal involvement (Pin Prick)
1h	T10 to T12	T10 to T12
4h	T10 to T11	T10 to T12
8h	T11 to T12	T11 to T12
12h	T10 to T12	None
24h	T10 to T11	None
Upper and lower dermatomal involvement (cold test)
1h	T10 to T12	T10 to T12
4h	T10 to T12	T10 to T12
8h	T11 to T12	T10 to T12
12h	T11 to T12	None
24h	T10 to T11	None

Median and (minimum-maximum).
Sensory spread after TAP block and infusion via TAP catheters. Active indicates infusion with ropivacaine and placebo with saline in the TAP catheters. The hours indicate time from TAP block performance.

ISSN: 1471-2253