
Get answers to your GI cancer surgery questions.
5-HT level; 5-hydroxytryptamine level; Serotonin test
Veins and arteries vary in size from one patient to another and from one side of the body to the other. Obtaining a blood sample from some people may be more difficult than from others.
Other risks may include:
Bluth MH, Hardin RE, Tenner S, Zenilman ME, Threatte GA. Laboratory diagnosis of gastrointestinal and pancreatic disorders. In: McPherson RA, Pincus MR, eds. Henry's Clinical Diagnosis and Management by Laboratory Methods. 21st ed. Philadelphia, Pa: Saunders Elsevier; 2006:chap 22.