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Related Experiment Videos

[Effects of open-heart surgery on renal function].

H Ando, K Matsui, H Kohno

    [Zasshi] [Journal]. Nihon Kyobu Geka Gakkai
    |July 1, 1989
    PubMed
    Summary

    Open-heart surgery temporarily impairs kidney function, affecting urine concentration even without acute kidney failure. Post-surgery, renal plasma flow and glomerular filtration rate decrease, while antidiuretic hormone levels rise.

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    Topic: Incisional Hernia - "Easy case" as daily case: open vs lap, where the mesh, which fixation…in center midline cases.

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    Area of Science:

    • Nephrology
    • Cardiovascular Surgery
    • Physiology

    Context:

    • Open-heart surgery, including cardiopulmonary bypass (CPB), presents a significant physiological stress.
    • Understanding the impact of CPB on renal function is crucial for patient outcomes.
    • This study focuses on patients with uneventful postoperative courses to isolate the effects of surgery itself.

    Purpose:

    • To investigate the effects of open-heart surgery on renal function in patients without acute renal failure.
    • To compare the renal functional changes between aorto-coronary bypass grafting and valve replacement surgeries.
    • To analyze the alterations in glomerular filtration rate (GFR), renal plasma flow (RPF), antidiuretic hormone (ADH) levels, urinary flow, and fractional sodium excretion post-surgery.

    Summary:

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  • During cardiopulmonary bypass (CPB), both renal plasma flow (RPF) and glomerular filtration rate (GFR) significantly decreased in patients undergoing open-heart surgery.
  • Despite decreased GFR and elevated plasma antidiuretic hormone (ADH) levels, urinary flow increased post-surgery, indicating a disturbance in renal urine concentrating ability.
  • Renal function recovery varied, with GFR returning to baseline by postoperative day 1 for bypass grafting and day 3 for valve replacement.

    • Impact:

    • These findings highlight that renal function, particularly urine concentration, is disturbed in the early phase after open-heart surgery, even in patients with uncomplicated recoveries.
    • The study provides insights into the transient but significant renal hemodynamic and hormonal changes following cardiac procedures.
    • Understanding these effects can inform clinical management and strategies to support renal health in cardiac surgery patients.