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[Renal function during cardiac surgery with extracorporeal circulation].

Guillermo Lema1, Roberto Canessa, Jorge Urzúa

  • 1Departamentos de Anestesiología, Nefrología, y Enfermedades Cardiovasculares, Pontificia Universidad Católica de Chile, Santiago, Chile. glema@med.puc.cl

Revista Medica De Chile
|September 5, 2008
PubMed
Summary
This summary is machine-generated.

Patients with valvular heart disease undergoing extracorporeal circulation surgery showed no significant renal deterioration. Renal function parameters remained stable, with no evidence of damage compared to coronary surgery patients.

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Area of Science:

  • Cardiology
  • Nephrology
  • Surgical Research

Background:

  • Patients with valvular heart disease face high risks of acute renal failure post-extracorporeal circulation surgery.
  • Understanding renal function changes during and after such procedures is critical.

Purpose of the Study:

  • To assess renal function parameters in valvular heart disease patients during extracorporeal circulation surgery.
  • To compare these changes with those in patients undergoing elective coronary surgery.

Main Methods:

  • Two groups studied: 12 (coronary surgery) and 11 (heart valve replacement).
  • Measured glomerular filtration rate and effective renal plasma flow using inulin and 131I-hippuran clearance.
  • Assessed sodium filtration fraction, fractional excretion, and urinary glutathione S-transferases as markers of tubular damage.

Main Results:

  • Effective renal plasma flow decreased postoperatively in valvular disease patients but not during surgery.
  • Glomerular filtration rates remained normal throughout.
  • Fractional excretion of sodium increased significantly postoperatively; no tubular damage markers were elevated.

Conclusions:

  • Renal function does not significantly deteriorate in valvular heart disease patients undergoing extracorporeal circulation surgery.
  • No significant differences in renal function were observed compared to coronary surgery patients.
  • No evidence of functional or cellular renal dysfunction or damage was found in either group.