Are there anyone who still use regular (with preservative) morphine for spinal anaesthesia?
In lot of countries the 'preservative free' morphine is almost impossible to get. The advantages of small doses of intrathcal morphine (say...200 mcg) can be really great in these countries.
Once diluted I really do not think regular morhine can be harmful. One ampuole of 10mg/ml morhine will get diluted more than 100 times by the time you take 200mcg and mix it with local anaesthetic mixture.
Please comment....