The BOTTOMLINE-CS trial is an international, open, single-center, pragmatic, randomised controlled trial to investigate whether multisite tissue oxygen saturation monitoring-guided perioperative care reduces composite complications within 30 days of randomization in off-pump coronary artery bypass grafting.
Short title: BOTTOMLINE-CS trial Methodology: International, open, single-center, pragmatic, randomised controlled trial Research sites: Tianjin Chest Hospital Objectives: To investigate whether multisite tissue oxygen saturation monitoring-guided perioperative care reduces composite complications within 30 days of randomization in off-pump coronary artery bypass grafting Number of patients: 1960 patients (980 per arm, two arms) Inclusion criteria: Patients aged ≥ 60 years undergoing elective off-pump coronary artery bypass grafting Exclusion criteria: Patient refusal, clinician refusal, preoperative requirement of respiratory support (intubation, CPAP or BiPAP, or high-flow oxygen (\>10 L/min)), preoperative requirement of external cardiac assist devices, emergent or urgent surgery, patients expected to die within 30 days, current participation in another clinical trial Statistical analysis: Analyses will be performed on a modified intention-to-treat basis including all randomized patients who had undergone the scheduled surgery and had the record of the primary outcome. Summary statistics for each group, treatment effects, 95% confidence intervals, and p values will be presented for primary and secondary outcomes, and process measures. The primary outcome is a composite of complications arising within 30 days from randomization and will be analyzed using a logistic regression model. Proposed start date: May 1, 2021 (First patient to be recruited) Proposed end date: April 30, 2023 (Last patient to be recruited) Study duration: 48 months (Starting from the first patient recruitment, spanning patient recruitment, data analysis, and manuscript writing and submission)
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
PREVENTION
Masking
SINGLE
Enrollment
1,960
The following intervention algorithm is intended to be used as a guidance only. We emphasize the different aspects that can cause changes in SctO2/SstO2 in a systematic approach. We avoid recommending a concrete drug and method of dosing for a specific condition. Manage tissue perfusion Preload: overall picture including direct observation of the heart, findings of echocardiography, urine output, blood loss, labs results, HR, BP, PPV, SVV, fluid responsiveness (SV increase \>/= 10% following 250 ml fluid bolus) Contractility: direct observation of the heart, findings of echocardiography Stroke volume and heart rate: important determinants of CO Systemic vascular resistance: important determinant of BP Regional vascular resistance: important determinant of tissue perfusion along with perfusion pressure Maintain autoregulation: normalize CO2, avoid potent vasodilators Manage arterial blood oxygen content Manage tissue metabolic activity
Usual care in this study means the standard perioperative care. Patients who are meant to receive usual care will receive both cerebral and muscular tissue oxygen saturation monitoring; however, the monitor screen will be covered and the monitoring data will not be used to guide clinical care.
Tianjin Chest Hospital
Tianjin, Tianjin Municipality, China
Composite complication
The primary outcome is a collapsed (one or more) composite of the following complications with a Clavien-Dindo grade II or greater arising within 30 days of randomization (randomization and surgery are performed on the same day). The patient is regarded as having the event of composite complications if any of the following complications occur (i.e., yes); otherwise, the patient is regarded as not having the event of composite complications. The percentage of patients having the event of composite complications will be used in the primary analysis. * Brain complications (delirium, cognition decline, stroke); * Cardiac complications (non-fatal cardiac arrest, myocardial injury, heart failure, new-onset symptomatic ventricular arrhythmia); * Respiratory failure; * Renal complications (AKI stages II and III); * Infectious complications; * Death.
Time frame: from the day of surgery (i.e., day 0) until postoperative day 30 for a total of 31 days (individual components may vary)
Atrial fibrillation
Atrial fibrillation A new diagnosis of AF per the current standard.
Time frame: from the day of surgery until postoperative day 30
Postoperative delirium
Postoperative delirium (assessed using CAM-ICU Worksheet for patients in PACU and ICU, or CAM for patients on the floor). The validated Chinese version will be used for assessment. Delirium will be formally assessed as early in the morning as practical and early evening for the initial five postoperative days while patients remain hospitalized because this approach will detect nearly all postoperative delirium. Observed daytime delirium will be recorded and considered as an outcome. Delirium will not be evaluated the evening after surgery because confusion might result from residual anesthetic effects.
Time frame: from postoperative day 1 throughout postoperative day 5
Postoperative cognitive decline
Postoperative cognitive decline (assessed using 30-points MoCA 7.1 version). The validated Chinese version will be used. MoCA evaluates multiple cognitive domains including executive function and is widely used. Validated versions of MoCA are available in many languages including Chinese and German. A decrease of ≥2 points is associated with cognitive decline based on formal neuropsychological testing and considered a clinically meaningful reduction.
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Time frame: Assessed before surgery, on postoperative day 5 and 30
Length of hospital stay
Length of hospital stay in days
Time frame: from the day of surgery (day 0) until hospital discharge or until day 30, whichever occurs first
Perioperative stroke
Any stroke per current clinical diagnostic criteria arising during surgery or after surgery until postoperative day 30.
Time frame: Stroke will be assessed from the day of surgery throughout postoperative day 30
Cardiac complications (one component of the primary outcome)
Cardiac complications include: * non-fatal cardiac arrest (An absence of cardiac rhythm or presence of chaotic rhythm requiring any component of basic or advanced cardiac life support.) * myocardial injury (Myocardial injury is defined as any myocardial infarction (i.e., 4th Universal Definition of myocardial infarction32), or any elevated troponin judged to be due to myocardial ischemia (i.e. without evidence of a non-ischemic etiology, e.g. chronic elevation, pulmonary embolism, sepsis, cardioversion, others) that occurred with the first 30 days after surgery.) * heart failure (per current standard diagnostic criteria.) * new-onset symptomatic ventricular arrhythmia (per current standard diagnostic criteria.)
Time frame: from the day of surgery (i.e., day 0) until postoperative day 30 for a total of 31 days
Respiratory failure (one component of the primary outcome)
Respiratory failure is defined as the requirement of respiratory support (intubation, CPAP or BiPAP, or high-flow oxygen (\>10 L/min)) for acute respiratory insufficiency for more than 6 hours after surgery.
Time frame: from the day of surgery (i.e., day 0) until postoperative day 30 for a total of 31 days
Renal complications (one component of the primary outcome)
Renal complications in this study refers to acute Kidney Injury stages II and III diagnosed using the Kidney Disease Improving Global Guidelines (KDIGO).
Time frame: from the postoperative day 1 until postoperative day 7 for a total of 7 days
Infectious complications (one component of the primary outcome)
Infectious complications include the following: * Surgical site infection (deep surgical site): * Surgical site infection (organ/space) * Pneumonia * Laboratory confirmed bloodstream infection * Infection, source uncertain * Sepsis Sepsis will be diagnosed per the Third International Consensus Definitions.38,39 The Task Force defines sepsis as a "life-threatening organ dysfunction due to a dysregulated host response to infection." Clinical diagnosis of organ dysfunction requires a two-point increase in the Sequential \[Sepsis-related\] Organ Failure Assessment (SOFA) score, starting the day after surgery and continuing throughout hospitalization as shown below (adopted from Singer38).
Time frame: from postoperative day 1 until postoperative day 30 for a total of 30 days