An observational study in Coronary Artery Disease, sponsored by Saglik Bilimleri Universitesi Gazi Yasargil Training and Research Hospital. Completed at 1 site in Turkey (Türkiye). Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2026-09-02.
Sponsored by Saglik Bilimleri Universitesi Gazi Yasargil Training and Research Hospital · Observational
Cardiopulmonary bypass (CPB) and aortic cross-clamp (ACC) durations are important intraoperative factors that may influence postoperative recovery following coronary artery bypass graft (CABG) surgery. Prolonged CPB and ACC durations may be associated with increased postoperative morbidity and extended intensive care unit (ICU) stay.
This retrospective observational cohort study aims to evaluate the independent associations of CPB and ACC durations with postoperative ICU length of stay in adult patients undergoing elective isolated CABG surgery. Electronic medical records of eligible patients who underwent surgery between January 1, 2019, and December 31, 2025, at a single tertiary care center will be retrospectively reviewed. Multivariable regression analyses will be performed to assess these associations after adjustment for clinically relevant potential confounders.
Cardiopulmonary bypass (CPB) and aortic cross-clamp (ACC) are essential components of coronary artery bypass graft (CABG) surgery. Prolonged CPB and ACC durations may contribute to systemic inflammatory responses, alterations in organ perfusion, and postoperative morbidity, potentially resulting in delayed postoperative recovery and prolonged intensive care unit (ICU) stay.
This single-center retrospective observational cohort study is designed to investigate the association of CPB and ACC durations with postoperative ICU length of stay in adult patients undergoing elective isolated CABG surgery. The electronic medical records of patients who underwent elective isolated CABG surgery between January 1, 2019, and December 31, 2025, will be retrospectively reviewed.
Demographic and preoperative clinical characteristics, including age, sex, body mass index, left ventricular ejection fraction, diabetes mellitus, chronic obstructive pulmonary disease, and chronic kidney disease, will be collected. Intraoperative data will include operative duration, CPB duration, and ACC duration. Postoperative ICU length of stay will be defined as the time from postoperative ICU admission to transfer from the ICU to the hospital ward.
The primary outcome of the study is postoperative ICU length of stay. CPB and ACC durations will be evaluated as continuous exposure variables measured in minutes. Their independent associations with ICU length of stay will be assessed using separate multivariable regression models adjusted for clinically relevant potential confounders. The distribution of ICU length of stay will be evaluated before multivariable analysis. Depending on the distributional characteristics of the outcome, multivariable linear regression after appropriate transformation or a generalized linear model with an appropriate distribution and link function will be used.
The study involves retrospective analysis of routinely collected clinical data and does not include any additional intervention, diagnostic procedure, or treatment related to the research.
5,598 studies on the registry are indexed under Coronary Artery Disease; 957 are open to participants now.
This study's enrollment of 387 is above the median of 336 across 1,947 observational studies indexed under Coronary Artery Disease.
Browse Coronary Artery Disease studies →Saglik Bilimleri Universitesi Gazi Yasargil Training and Research Hospital is the lead sponsor of 56 studies on the registry; 25 are open to participants now.
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Adult patients who underwent elective isolated coronary artery bypass graft surgery at a single tertiary care center between January 1, 2019, and December 31, 2025. All patients meeting the predefined eligibility criteria and with complete electronic medical records required for the study analyses will be included in the retrospective cohort.
Exclusion Criteria:
Adult patients who underwent elective isolated coronary artery bypass graft surgery between January 1, 2019, and December 31, 2025, and met the predefined eligibility criteria. Cardiopulmonary bypass and aortic cross-clamp durations will be evaluated as continuous exposure variables.
Other: Cardiopulmonary Bypass Duration · Other: Aortic Cross-Clamp Duration
Cardiopulmonary bypass duration, defined as the total duration of cardiopulmonary bypass during elective isolated coronary artery bypass graft surgery and recorded in minutes. This exposure will be evaluated as a continuous variable based on routinely collected perfusion records.
Aortic cross-clamp duration, defined as the total duration of aortic cross-clamping during elective isolated coronary artery bypass graft surgery and recorded in minutes. This exposure will be evaluated as a continuous variable based on routinely collected operative and perfusion records.
Postoperative Intensive Care Unit Length of Stay
Postoperative intensive care unit length of stay will be defined as the duration from admission to the intensive care unit following surgery until transfer from the intensive care unit to the hospital ward and will be recorded in days. Patients who die during the intensive care unit stay will not be included in the primary intensive care unit length-of-stay analysis.
Time frame: Up to 30 days after surgery
Postoperative Atrial Fibrillation
Occurrence of new-onset atrial fibrillation during the postoperative period, identified from electrocardiographic findings and clinical records.
Time frame: Up to 30 days after surgery
Acute Kidney Injury
Occurrence of postoperative acute kidney injury defined according to the Kidney Disease: Improving Global Outcomes (KDIGO) criteria as an increase in serum creatinine of ≥0.3 mg/dL within 48 hours, an increase in serum creatinine to ≥1.5 times baseline within 7 days, or urine output \<0.5 mL/kg/h for at least 6 hours.
Time frame: Up to 30 days after surgery
Postoperative Respiratory Failure
Occurrence of postoperative respiratory failure, defined as the need for invasive mechanical ventilation for more than 48 hours after surgery, unplanned reintubation due to respiratory failure following initial extubation, or the need for noninvasive ventilatory support due to persistent or worsening respiratory failure during the postoperative period.
Time frame: Up to 30 days after surgery
30-Day All-Cause Mortality
Death from any cause occurring within 30 days after surgery.
Time frame: Within 30 days after surgery
Plan to share: Undecided
This study is completed, as verified in Sep 2026. You cannot join it, but the record below documents what was studied.
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Saglik Bilimleri Universitesi Gazi Yasargil Training and Research Hospital