Table 4.

Details regarding extradural catheter placement, number of postoperative administrations, volume and concentration of the L-bupivacaine used in a cohort of dogs undergoing cholecystectomy.

	Tuohy needle	Catheter advancement	First 24 PO h			24-48 PO h
			L-Bupivacaine administration			L-Bupivacaine administration
N of dogs	Entrance point	Tip of the needle level	Administrations (n)	Volume (ml/kg/dose)	% solution	Administrations (n)	Volume (ml/kg/dose)	% solution
1	T13-L1	T10-T11	4	0.12	0.17	2	0.12	0.17
1	L2-L3	T13-L1	5	0.32	0.25	2	0.32	0.17
1	L6-L7	L2-L3	2	0.32	0.14	0
3	L6-L7	T13-L1	4	0.2	0.125	1	0.2	0.125
			5	0.13	0.125	5	0.18	0.125
			2	0.25	0.25	1	0.25	0.25
10	L7-S1	T13-L1	4	0.2	0.125	0
			5	0.24	0.13	0
			4	0.21	0.125	0
			4	0.31	0.15	4	0.31	0.15
			4	0.13	0.2	3	0.13	0.2
			4	0.16	0.25	N/A
			1	0.1	0.125	N/A
			5	0.27	0.15	5	0.27	0.15
			2	0.21	0.25	0
			5	0.2	0.15	4	0.25	0.14
2	L7-S1	L1-L2	4	0.14	0.13	0
			6	0.54	0.25	4	0.54	0.25
1	L7-S1	L2-L3	5	0.19	0.17	6	0.19	0.17
2	L7-S1	L3-L4	3	0.15	0.17	1	0.15	0.17
			4	0.26	0.2	4	0.26	0.2

PO, postoperative; n, number; T, thoracic; L, lumbar; S, sacral; h, hours; N/A, not available as the dog was excluded from analysis because it was either euthanised or the extradural catheter was removed.