Weight in kg	Age in years	Dose (ml) 0.25% bupivacaine for a block to T12	Dose (ml) 0.25% bupivacaine for a block to T7
12.5	2	4	6
15	3	5	7.5
16	4	5.5	8
17.5	5	6	9
20	6	7	10.5
22.5	7	8	12
25	8	9	13.5
27.5	9	10	15
30	10	11	16.5

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