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Table 1 Characteristics of dilution per method

From: Measurement of drug concentration and bacterial contamination after diluting morphine for intrathecal administration: an experimental study

Group Starting concentration Number of dilutions Dilution volume
Method 1 10 mg/ml morphine 1 100 ml NaCl 0.9%
Method 2 10 mg/ml morphine 2 9 ml NaCl 0.9%, twice
Method 3 1 mg/ml morphine 1 9 ml NaCl 0.9%
Pharmacy 60 mcg/ml morphine
2.5 mg/ml bupivacaine
0 N/A