hi! in my experience, i have used as much as 15mg or 3cc of 0.5% bupivacaine +/- morphine in c-section. though, i've experienced a high spinal, it was manageable and it doesn't happen at all times. I usually give it for 30 sec. Also, loading is very important to avoid hypotension. I also have a good experience with tetracaine in 2cc D10 water. I experience less high spinal and less hypotension. I usually give 12mg or 1.2ml. but if the fundic height is bigger, i give only 10mg or 1cc.
i hope this will help you...
i hope this will help you...