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Chronic renal venous catheterization in fetal sheep
The American Journal of Physiology
|September 1, 1983
Summary
This study introduces a new method for monitoring fetal lamb renal function by chronically implanting catheters in the renal vein. The technique accurately measures renal venous blood without affecting kidney function or causing contamination.
Area of Science:
- Fetal Physiology
- Renal Function Monitoring
- Surgical Techniques
Background:
- Accurate assessment of renal function requires monitoring both arterial and venous blood.
- Existing methods may be invasive or unsuitable for chronic fetal studies.
Purpose of the Study:
- To describe and validate a novel technique for chronic renal venous catheterization in fetal lambs.
- To enable long-term monitoring of renal function in the fetal state.
Main Methods:
- Chronic implantation of catheters into the left renal vein of fetal lambs (120-125 days gestation).
- Catheters maintained for 6-11 days.
- Assessment of renal blood flow, morphology, and blood sample purity (absence of inferior vena cava contamination).
Main Results:
- The catheterization technique was successfully implemented in 11 fetuses.
- No significant influence on renal blood flow or morphology was observed.
- Blood samples were confirmed to be uncontaminated by inferior vena cava blood.
Conclusions:
- This chronic renal venous catheterization technique is a reliable method for studying fetal renal physiology.
- The method allows for accurate, long-term monitoring of renal function in instrumented fetal animals.