An investigation into the reduction in flow rate of intravenous fluid by antireflux valves.
We have investigated the extent to which antireflux (non-return) valves impede the maximum flow rate of crystalloid in intravenous infusion systems when administered either under gravity or with 300 mmHg added pressure. When used with a 16G cannula, a reduction in flow rate of 19-38% was consistently seen. With a 20G cannula, no significant reduction in flow was found. The valve tested that produced the least reduction in flow was the Westcott Sae-flo valve.
Hall
J M
JM
Royal Devon and Exeter Hospital NHS Foundation Trust, Wonford Site, Barrack Road, Exeter EX2 5DW, UK. jonhall@doctors.org.uk
Roberts
F L
FL
D002406:Catheterization, Peripheral / Q000295:instrumentation; D000077324:Crystalloid Solutions; D004334:Drug Administration Schedule; D006112:Gravitation; D006801:Humans; D007262:Infusions, Intravenous / Q000295:instrumentation; D007552:Isotonic Solutions; D010952:Plasma Substitutes / Q000008:administration & dosage*; D011312:Pressure; D015532:Rehydration Solutions / Q000008:administration & dosage*; D012212:Rheology
D000077324:Crystalloid Solutions; D007552:Isotonic Solutions; D010952:Plasma Substitutes; D015532:Rehydration Solutions