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

Figure 2

Illustration of ultrasound guided venous access. (a) Illustration demonstrating the in-plane technique for the ultrasound guided access. The inset shows a schematic of the needle within the vein in long axis. (b) Illustration demonstrating out-of-plane technique for ultrasound guided access. The inset shows a schematic of the blood vessel in cross section with the dot being the needle position in the respective transducer locations. (c) Overlay illustration on an axial CT image demonstrating the relationship of the needle to the venous structure, with different positions of the fluoroscope C arm. The pink shading over the CT image denotes the spleen.

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