Urinary solute transport by gastric mucosa: a comparison with ileum using a rat model.

Abstract:

OBJECTIVES:This study was conducted to quantitate and compare urinary solute transport by stomach and ileum using an in vivo rat model. METHODS:An artificial urine solution was perfused through isolated gastric and ileal segments in the anesthetized rat. Concentrations of solutes and a volume marker were periodically determined in the perfusate and net solute flux was calculated. RESULTS:The stomach secretes less sodium and very little bicarbonate in comparison with ileum. Hydrogen ion and chloride are absorbed by ileum but secreted in large quantities by the stomach. Ammonium, potassium, and urea are absorbed by both segments but to a much lesser degree in the stomach. Overall, there was a net osmolar absorption by ileum, and a net secretion by the stomach. Both segments secrete water to a similar degree. CONCLUSIONS:These findings both suggest the mechanism of the hypochloremic metabolic alkalosis seen after urinary reconstruction with the stomach and provide insight into potential therapeutic approaches. Solute fluxes in both the stomach and the ileum are consistent with the known physiology of these segments.

journal_name

Urology

journal_title

Urology

authors

Brandell RA,Scaletscky R,Koch MO

doi

10.1016/s0090-4295(94)80091-x

subject

Has Abstract

pub_date

1994-09-01 00:00:00

pages

343-7

issue

3

eissn

0090-4295

issn

1527-9995

pii

S0090-4295(94)80091-X

journal_volume

44

pub_type

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