Can Atelectasis Be Prevented With Oxygen Reserve Index (ORI) Monitoring?

Launched by ANTALYA TRAINING AND RESEARCH HOSPITAL · Jul 1, 2025

Keywords

ClinConnect Summary

This clinical trial is studying whether using a special monitor called the Oxygen Reserve Index (ORI) during surgery can help prevent a common lung problem called atelectasis, where parts of the lung collapse after the operation. The researchers will look at adult patients having planned robotic surgeries under general anesthesia that last more than two hours. They will use lung ultrasound, a painless imaging method, to check the lungs after surgery and see if ORI monitoring makes a difference.

To take part, patients need to be generally healthy enough for surgery (classified as ASA I-III), be scheduled for elective robotic surgery lasting over two hours, and require a small tube in an artery for monitoring during the operation. People with severe health issues, low oxygen levels before surgery, chronic lung diseases, blood disorders, pregnancy, or those who do not want to participate will not be eligible. If you join, your care team will use the ORI monitor during your surgery to help manage your oxygen levels more precisely, with the goal of reducing lung complications afterward. This study is not yet recruiting participants but aims to improve safety and recovery for patients undergoing these types of surgeries.

Gender

ALL

Eligibility criteria

• Inclusion Criteria:
• • American Society of Anesthesiologists Physical Status Classification System (ASA) physical status I-III
• • Elective robotic surgery under general anesthesia
• • Surgery duration \>2 hours
• • Requires invasive arterial cannulation
• • Signed informed consent
• Exclusion Criteria:
• • ASA IV or higher
• • Room air SpO₂ \<92%
• • Chronic pulmonary disease
• • Hemoglobinopathy
• • Pregnancy
• • Refusal to participate