Assessment of Renal Perfusion Using Ultrasound and Near-Infrared Spectroscopy in Patients Undergoing Minimally Invasive Abdominal Surgery
Recruiting now
Conditions studied: Renal Perfusion, Minimally Invasive Surgical Procedures, Acute Kidney Injury
In brief
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 intraoperative renal perfusion changes and the development of postoperative acute kidney injury. The findings may contribute to improved perioperative monitoring and optimization of renal perfusion during minimally invasive abdominal surgery.
Key facts
- Study ID
- NCT07635160
- Run by
- Istanbul University - Cerrahpasa
- People needed
- 51
- Starts
- 2026-01-07
- Expected to finish
- 2027-01-07
- Last updated by the study team
- 2026-06-09
Who can join
Age: 18 and older, up to 80. Sex: any. Healthy volunteers: not accepted.
You may qualify if…
- 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
You may not qualify if…
- 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
Where it is running
- Istanbul University Cerrahpaşa Faculty of Medicine — Istanbul, Turkey (Türkiye) (enrolling)
Full record on ClinicalTrials.gov
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