Table 2 Actual number of doses of morphine required.

	Morphine doses required
	0	1	2	5
Infusion (n 18), n (%)	13 (72)	3 (17)	2 (11)	0
Standard block (n 22), n (%)	10 (45)	7 (32)	4 (18)	1 (5)
Total, n (%)	23 (57.5)	10 (25)	6 (15)	1 (2.5)