Combined Predictive Value of RSBI and CALLY Index in Predicting Weaning Success in ICU Patients

The primary objective of this prospective observational study is to evaluate the effectiveness of combining the Rapid Shallow Breathing Index (RSBI) and CRP-Albumin-Lymphocyte (CALLY) index to predict weaning success in adult patients within the intensive care unit. While weaning from mechanical ventilation is a critical clinical step, existing physiological metrics like RSBI do not fully capture a patient's inflammatory or nutritional status. This research introduces the CALLY index calculated as the ratio of the patient's immuno-nutritional reserve (Albumin and Lymphocytes) to systemic inflammation (CRP) as a complementary metabolic marker. By tracking approximately 105 participants at Basaksehir Cam and Sakura City Hospital, the study monitors weaning success over both a 48 hour and a 7 day period to identify both immediate and late phase extubation failures. The ultimate goal is to provide a more holistic prediction model that potentially reduces re-intubation rates and improves clinical outcomes by accurately identifying the optimal time for ventilator removal.

NCT Number	NCT07571317
Lead Sponsor	Istanbul University - Cerrahpasa
Conditions	Critical Illness, Respiratory Insufficiency, Ventilator Weaning, Weaning Failure of Mechanical Ventilation
Enrollment	105 participants
Start Date	2026-05-04
Primary Completion	2026-06-30 (estimated)
Study Completion	2026-07-31 (estimated)
Updated on ClinicalTrials.gov	2026-05-11