IDRIS AHAMED H. MD; MELKER, RICHARD J. PhD, MDPediatric Emergency Care: June 1992 Original Articles: PDF Only Buy Abstract We evaluated high-flow intravenous devices designed specifically for fluid resuscitation of infants and children. Fluid flow rates with 4-, 5-, and 6-Fr high-flow sheaths and 18-, 20-, and 22-gauge catheters were measured and compared. Flow rate is significantly faster with the 4-Fr sheath (P<0.0001) than with the 18-, 20-, or 22-gauge catheter. The high flow rates possible with the sheaths make them ideal for use in patients who require rapid fluid resuscitation. © Lippincott-Raven Publishers.