Control Volume Analysis of the Infusion Rate in Cephalic and Median Cubital Veins Based on Infusion Bag Height and Peripheral Venous Catheter Inner Diameter: Application of Bernoulli’s Equation and Consideration of Frictional Forces

Figures & data

Figure 1 Composition of the control volume analysis.

Table 1 Infusion Rate via the Cephalic Vein According to Fluid Height and Catheter Inner Diameter (Flow Rate Unit: mL/sec)

Gauge Height	14G	16G	17G	18G (L=45mm)	18G (L=32mm)	20G	22G	24G	26G
0.8m	1.102	1.007	0.876	0.769	0.811	0.601	0.440	0.270	0.207
0.9m	1.254	1.140	0.987	0.863	0.910	0.670	0.489	0.300	0.230
1.0m	1.404	1.270	1.095	0.955	1.005	0.737	0.536	0.328	0.252
1.1m	1.553	1.399	1.200	1.045	1.098	0.802	0.581	0.355	0.274
1.2m	1.700	1.526	1.304	1.132	1.188	0.864	0.624	0.381	0.294
1.3m	1.847	1.651	1.405	1.217	1.275	0.925	0.666	0.407	0.314
1.4m	1.992	1.774	1.504	1.300	1.361	0.984	0.707	0.431	0.334
1.5m	2.137	1.895	1.601	1.381	1.445	1.041	0.746	0.455	0.353

Figure 2 Infusion rate via the cephalic vein according to fluid height and catheter inner diameter.

Table 2 Infusion Rate via the Median Cubital Vein According to Fluid Height and Catheter Inner Diameter (Flow Rate Unit: mL/sec)

Gauge Height	14G	16G	17G	18G (L=45mm)	18G (L=32mm)	20G	22G	24G	26G
0.8m	1.093	0.999	0.869	0.763	0.805	0.597	0.437	0.269	0.206
0.9m	1.245	1.132	0.980	0.858	0.904	0.666	0.486	0.298	0.229
1.0m	1.395	1.263	1.088	0.950	0.999	0.733	0.533	0.326	0.251
1.1m	1.544	1.391	1.194	1.039	1.092	0.798	0.578	0.354	0.273
1.2m	1.692	1.518	1.298	1.127	1.182	0.861	0.622	0.380	0.293
1.3m	1.838	1.643	1.399	1.212	1.270	0.921	0.664	0.405	0.313
1.4m	1.984	1.767	1.498	1.295	1.356	0.980	0.704	0.430	0.333
1.5m	2.128	1.888	1.596	1.377	1.440	1.038	0.744	0.453	0.351

Figure 3 Infusion rate via the median cubital vein according to fluid height and catheter inner diameter.