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Renal function in obstructive jaundice in man: cholangiocarcinoma model.
V Sitprija1, U Kashemsant, A Sriratanaban
1Department of Medicine, Chulalongkorn University Hospital, Bangkok, Thailand.
Kidney International
|November 1, 1990
Summary
Severe jaundice impairs kidney function, affecting water balance and sodium excretion. In severe cases with low albumin, the kidneys retain salt and water, indicating altered tubular reabsorption.
Area of Science:
- Nephrology
- Hepatology
- Internal Medicine
Background:
- Obstructive jaundice, particularly from cholangiocarcinoma, can significantly impact systemic physiology.
- Understanding renal function alterations in jaundice is crucial for patient management.
Purpose of the Study:
- To investigate renal hemodynamics and water clearance in patients with obstructive jaundice.
- To correlate changes in renal function with the severity of jaundice and serum albumin levels.
Main Methods:
- Studied 15 patients with obstructive jaundice and compared them to healthy controls.
- Assessed renal function, including water and electrolyte clearance, renal blood flow, and creatinine clearance.
- Categorized patients based on jaundice severity (serum bilirubin levels) and albumin status.
Main Results:
- Mild to moderate jaundice showed no significant renal function changes.
- Severe jaundice (high bilirubin) with normal albumin led to increased sodium excretion and decreased water clearance.
- Severe jaundice with hypoalbuminemia resulted in decreased renal blood flow, creatinine clearance, and salt/water retention.
Conclusions:
- Severe jaundice inhibits sodium chloride reabsorption in the thick ascending limb of Henle's loop.
- Antidiuretic hormone (ADH) and increased collecting tubule conductivity may reduce free water clearance.
- Hypoalbuminemia in severe jaundice shifts the renal response from salt loss to salt retention via increased proximal tubular sodium reabsorption.