No rigid rules for selecting IV or general anesthesia.
For procedures lasting 1-2 hours, IV sedation is an acceptable alternative.
For a procedure lasting 3 hours, I often recommend general anesthesia because it is often difficult for a patient to remain comfortable for that period of time.
However, this varies tremendously among surgeons and depending on the extent of the procedure and the patient tolerance, these are not rigid rules.
If an individual is having liposuction of less sensitive areas and has a history of adverse reactions to...