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Catheter Modification Techniques for Venous Sampling 

Catheter Modification Techniques for Venous Sampling
Chapter:
Catheter Modification Techniques for Venous Sampling
Author(s):

S. Lowell Kahn

DOI:
10.1093/med/9780199986071.003.0062
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date: 29 January 2020

Venous sampling is critically important in the diagnosis and localization of pituitary, parathyroid, renal, adrenal, and ovarian endocrine tumors and conditions. Catheterization of smaller veins can present a challenge and may be responsible for technical failures, particularly with adrenal vein, parathyroid, and inferior petrosal sinus venous sampling. Beyond the inherent challenges of catheterization posed by small veins, obtaining adequate blood samples can be difficult because the return of blood from a small vein may be exceedingly slow. This chapter discusses techniques to enhance the return of venous blood flow from a diagnostic catheter in a small vein. These techniques are applicable to all venous sampling, but they are particularly beneficial when sampling small-caliber veins.

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