Table 10

Haematological and biochemical blood test monitoring schedule following vertical sleeve gastrectomy, roux-en-Y gastric bypass and bilopancreatic diversion with duodenal switch23 24.

Blood testVertical sleeve gastrectomyRoux-en-Y gastric bypass
Bilopancreatic diversion with duodenal switch
Full blood countAt 3,6 and 12 months in the first year, annually thereafterAt 3,6 and 12 months in the first year, annually thereafter
Urea and electrolytesAt 3,6 and 12 months in the first year, annually thereafterAt 3,6 and 12 months in the first year, annually thereafter
Liver functionAt 3,6 and 12 months in the first year, annually thereafterAt 3,6 and 12 months in the first year, annually thereafter
Iron studies, Folate, Ca2+, Vit D, PTHAt 3,6 and 12 months in the first year, annually thereafterAt 3,6 and 12 months in the first year, annually thereafter
Vitamin B12 6 monthly first year, annually thereafter. Consider sooner if anaemia or peripheral neuropathy
No need to monitor if receiving intramuscular B12 injections
6 and 12 months in first year, annually thereafter. Consider sooner if anaemia or peripheral neuropathy
No need to monitor if receiving intramuscular B12 injections
Zinc, copperNot routinelyAnnually. Consider sooner if unexplained anaemia, hair loss, change in taste acuity, poor wound healing
SeleniumNot routinelyNot routinely. Consider if unexplained fatigue, anaemia, metabolic bone disease, diarrhoea, heart failure
Vitamin ANot routinelyAnnually for BPD-DS. Consider in RYGB if steatorrhoea or night blindness
Vitamin E, KNot routinelyNot routinely. Consider if unexplained anaemia, peripheral neuropathy, coagulopathy
  • BPD-DS, bilopancreatic diversion with duodenal switch; Ca2+, calcium; PTH, parathyroid hormone; RYGB, roux-en-Y gastric bypass; Vit D, vitamin D.