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. Author manuscript; available in PMC: 2020 Oct 1.
Published in final edited form as: Metabolism. 2019 May 31;99:119–125. doi: 10.1016/j.metabol.2019.05.011

Figure 5.

Figure 5.

Plasma insulin time courses during euglycemic clamps with either intraportal or peripheral insulin infusions. Insulin is infused at 3 sequential rates shown in the table. Note that intraportal infusion rates are twice the rates infused peripherally to account for ~50% first-pass hepatic extraction. As a result, insulin levels in the peripheral circulation were well-matched. Adapted from (22).