![]() ![]() One could argue that the difference in infusing a liter in an extra 1-2 minutes is not clinically significant. A 14ga PVC and 8.5Fr sheath infused faster in pressure bag trials (5-6 minutes). Under pressure, flow rates of a TLC with all 3 ports running was statistically similar to a 16ga PVC and 6Fr sheath introducer all took 6-7 minutes to infuse a liter. For the pressure bag tests, each 1L bag of NS was placed at 300 mmHg. 1L of NS was placed on each lumen of the TLC, and they calculated the 1L NS flow time from the total time it took to empty the bags. The TLC used was a standard 20cm CVC with one 16ga and 2x18ga ports. This was a blinded observational study of flow rates with gravity compared to pressure bags through multiple different IV catheters. “If you ain’t first, you’re last.” –Reese Bobby, father of Ricky Bobby However, in these critically ill patients there is often a need for multiple ports, and a triple-lumen catheter is ideal for this purpose. Previous literature ( Mateer et al., 1983) demonstrates that 8 and 9Fr sheath introducers have significantly faster in vitro flow rates of saline and blood products compared to large bore PVCs. But 14ga PVC and 8.5Fr sheath rates were faster in both instances. ![]() On gravity-flow, it was not statistically different from a 16 gauge PVC. There were no statistically significant differences in pressure-bag flow rates for 1L of NS through all three ports of a standard triple-lumen catheter (TLC) compared to a 16 gauge peripheral venous catheter (PVC) or a 6Fr sheath introducer. ![]()
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