RecruitingNCT07571317

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

Combined Predictive Value of Rapid Shallow Breathing Index (RSBI) and CRP-Albumin-Lymphocyte (CALLY) Indices in Predicting the Success of Weaning From Mechanical Ventilation in Intensive Care Patients: A Prospective Observational Study

Sponsor

Istanbul University - Cerrahpasa

Enrollment

105 participants

Start Date

May 4, 2026

Study Type

OBSERVATIONAL

Conditions

Respiratory Insufficiency Critical Illness Weaning Failure of Mechanical Ventilation Ventilator Weaning

Summary

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.

Eligibility

Min Age: 18 Years

Inclusion Criteria4

Patients aged 18 years and older
Patients who have received invasive mechanical ventilation for at least 24 hours in the general intensive care unit.
Patients who meet standard clinical weaning criteria (e.g., hemodynamic stability with minimal or no vasopressor support, adequate cough reflex, absence of excessive airway secretions).
Patients deemed ready for a Spontaneous Breathing Trial by the attending physician.

Exclusion Criteria4

Patients under the age of 18.
Patients with a known or detected pregnancy.
Patients with a diagnosis of malignancy.
Patients with neuromuscular diseases that could impair respiratory effort or muscle strength assessments (e.g., Myasthenia Gravis, Amyotrophic Lateral Sclerosis, Guillain-Barré syndrome).

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