Comparative Evaluation of Two Venous Sampling Techniques for the Assessment of Pancreatic Insulin and Zinc Release upon Glucose Challenge

Figure 4

Angiographic demonstration of venous sampling sites. (a) Digital fluoroscopic image demonstrating the catheter tip (white arrow) in position for obtaining samples from the distal left portal vein (white arrowheads). (b) Digital fluoroscopic image demonstrating the splenoportal confluence (white thick arrow). Note the opacified splenic vein (white thin arrow) and the long extra-hepatic course of the portal vein (white arrowheads).

(a)

(b)