Crystalloid preloading in spinal anaesthesia.
D000368:Aged; D000369:Aged, 80 and over; D000775:Anesthesia, Spinal; D005260:Female; D006801:Humans; D007022:Hypotension / Q000517:prevention & control; D007552:Isotonic Solutions; D008297:Male; D008875:Middle Aged; D011292:Premedication
D007552:Isotonic Solutions; C028570:Ringer's acetate