Blood Work and Lab Orders

Routine blood work and lab orders are vital to maintaining good health following the Duodenal Switch weight loss surgery. Everyone’s body is different and by examining the blood work and adjusting vitamin, mineral supplements and protein intake a patient will not only be healthier, but will also be able to detect any potential problems that may occur.

The surgeon will have his or her own list of recommended blood work and lab orders. Be sure to follow the surgeon’s guidelines and send the results to the surgeon for evaluation.

For informational purposes only there are lists of blood work and lab orders from various sources to follow.

From the American Association of Clinical Endocrinologists:
AACE Guidelines


Recommended Biochemical Surveillance of Nutritional Status After Malabsorptive Bariatric Surgical Procedures

Time Interval

First Year – every 3-6 months. Some surgeons get an abbreviated limited blood work at 4-8 weeks time base on a patients specific clinical condition.
Thereafter – Every 6-12 months depending on symptoms.

Laboratory tests
CBC, platelets
Iron studies, ferritin
Vitamin B12
Liver function
Lipid profile
Albumin and Pre-albumin
RBC folate
Fat-soluble vitamins (6-12 months)
– Vitamin A
– Vitamin D, 25-OH
– Vitamin E
– Vitamin K1 and INR
Metabolic bone evaluation
– Intact PTH
– 24-Hour urine calcium
– Urine N-telopeptide (annually)
Metabolic stone evaluation (annually)
– 24-Hour urine calcium, citrate, uric acid and oxalate
– Trace elements (annually or as needed)
– Selenium
Miscellaneous (as needed)
– Carnitine
– Essential fatty acid chromatography