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Table 3 Representation of the conversion factors for the equivalent dose of 1mg morphine

From: Is changing the postoperative pain management in total knee arthroplasty from femoral nerve block to local infiltration analgesia successful? Retrospective trial with the first and last 100 patients

tramadol

po

x0.20

morphine po 1g

pethidine

iv

x0.13

morphine po 1g

oxycodone

po

x1.50

morphine po 1g

piritramide

iv

x0.66

morphine po 1g

piritramide

sc

x0.66

morphine po 1g