Abstract
The use of intestinal segments in genitourinary reconstruction could influence vitamin metabolism and affect the skeletal bone and its mineral content in the long term. In 137 patients, serum levels of the vitamins A, B1, B2, B6, B12, D, and E and of folic acid, bile acid, and ammonia as well as levels of intracorpuscular vitamin B12 and folic acid were examined and a red blood cell count was performed. The patients were divided into three groups (< or = 2 years, > 2 to < or = 4 years, and > 4 years after surgery) as well as into children and adults. In addition, bone mineral density (dual-photon absorptiometry) was measured in 25 patients. Of these, 16 patients were approximately 16.8 years s/p rectal reservoir, 6 were approximately 20.5 years s/p colonic conduit, two were 6 and 8 years s/p ileocecal pouch, and one adolescent was 5 years s/p ileal bladder augmentation. In all patients the levels of vitamins A, B1, B2, B6, D, and E and of folic acid, bile acid, and ammonia as well as the red blood cell count were within normal ranges. In children (n = 51) there was no significant drop in vitamin B12 levels after the operation. In adults (n = 86), serum vitamin B12 levels dropped significantly from 402 +/- 182 ng/l during the first 2 years after the operation to 292 +/- 204 ng/l after the 4th year (normal range 240-1,100 ng/l). No significant increase in the intracorpuscular vitamin B12 level was observed during the same period. The bone mineral density was normal in all 25 patients with different types of urinary diversion. In addition to regular examination (sonography, creatinine levels, and base excess), vitamin B12 levels should be determined at 4 years after urinary diversion. It remains unclear whether substitution is necessary. However, substitution is easy to achieve and cheaper than the regular determination of vitamin B12. No decrease in bone mineral content was seen in the long-term follow-up with early correction of the base excess (below -2.5).
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
