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Assessment of Renal Perfusion Using Ultrasound and Near-Infrared Spectroscopy in Patients Undergoing Minimally Invasive Abdominal Surgery

Recruitingn/aAges 18 Years - 80 YearsAllIstanbul University - Cerrahpasa
NCT07635160 on ClinicalTrials.gov ↗
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In plain words

What the trial is, and whether it could suit you

This prospective observational study aims to evaluate renal perfusion in adult patients undergoing elective minimally invasive abdominal surgery. Renal perfusion will be assessed using two non-invasive monitoring techniques: Doppler ultrasonography-derived Renal Resistive Index (RRI) and Near-Infrared Spectroscopy (NIRS)-derived renal regional oxygen saturation (rSO₂). Measurements will be obtained at predefined perioperative time points, including after induction of anesthesia, during pneumoperitoneum, before extubation, and during the early postoperative period. Perioperative changes in renal perfusion parameters will be analyzed and correlated with clinical variables such as intra-abdominal pressure, pneumoperitoneum duration, hemodynamic parameters, fluid administration, urine output, and postoperative renal function. The study also aims to investigate the relationship between intr

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📋 Eligibility rules (as published)
Inclusion Criteria: * Patients aged 18 to 80 years * Patients with ASA physical status I, II, or III * Patients undergoing elective minimally invasive abdominal surgery for any reason * Patients whose expected surgical duration is longer than 1 hour Exclusion Criteria: * Body mass index greater than 35 kg/m² * Severe respiratory system disease * Severe heart failure, NYHA class III-IV * Presence of a cardiac pacemaker or cardiac defibrillator implant * Progressive neuromuscular disease * High intra-abdominal pressure * Sudden deterioration of general condition * Incomplete clinical or laboratory data * Refusal to participate in the study * Conversion to open surgery
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What it tests

  • Not listed
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Where

1 site
Istanbul University Cerrahpaşa Faculty of Medicine
Istanbul, Turkey (Türkiye)
🤝 Taking part is your choice, and you can leave at any time. Only the trial team can confirm you are eligible — always decide together with your own doctor.
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