Fast-track cardiac anesthesia increased early extubation in a two-center pilot randomized trial of adults undergoing scheduled coronary artery bypass grafting (CABG) with cardiopulmonary bypass. Weinberg and colleagues compared an integrated anesthetic and extubation pathway with usual care in 100 selected patients. Extubation within four hours of intensive care unit (ICU) admission occurred in 54% of pathway patients versus 6% with usual care, but the trial did not establish shorter hospital stays or definitive safety.
Who Was Studied?
The trial enrolled patients at Austin Health and Epworth Eastern Hospital in Victoria, Australia. Participants underwent isolated, scheduled CABG, had preserved left ventricular systolic function, and were considered at low to moderate operative risk. Of 374 patients screened, 102 were eligible and 100 were randomized equally between the two groups.
The study used concealed allocation, blinded endpoint assessment, complete follow-up, and intention-to-treat analysis. Treating anesthetists knew the allocation. Although ICU clinicians were intended to remain blinded, the investigators did not formally test whether this blinding was successful.
What Did the Fast-Track Cardiac Anesthesia Pathway Include?
The intervention combined methadone, dexmedetomidine, remifentanil, magnesium, lignocaine, sugammadex-based neuromuscular blockade reversal, and a structured early extubation workflow. Its purpose was to coordinate emergence, analgesia, and readiness assessment across the perioperative team.
This was a test of the complete pathway. It cannot show that any single drug produced the observed benefit, or distinguish the pharmacological effects from the effect of a more structured extubation process. The findings should therefore be interpreted at the pathway level rather than as evidence for an isolated medication choice.
Earlier Extubation and Less Rescue Opioid Use
The primary clinical endpoint was extubation within four hours of ICU admission; patients extubated in the operating room were assigned a ventilation time of zero. Twenty-seven of 50 pathway patients met that endpoint, compared with three of 50 usual-care patients. The absolute difference was 48 percentage points (95% confidence interval, 31 to 62 percentage points).
Ten pathway patients were extubated in the operating room, compared with none in the usual-care group. Median postoperative ventilation time was 3.9 hours with the pathway and 10.8 hours with usual care. The reported Hodges-Lehmann location-shift estimate was minus 5.0 hours (95% confidence interval, minus 7.2 to minus 3.2 hours); this estimate is distinct from simply subtracting the two medians.
Median rescue opioid consumption during the first 24 hours was 26.5 versus 33.7 mg of intravenous morphine equivalents. Severe pain at the 24-hour assessment occurred in three of 48 assessable pathway patients and 13 of 47 assessable usual-care patients. Five participants remained ventilated and could not be assessed for that pain outcome. Rescue opioid use should not be confused with total perioperative opioid exposure, because methadone was part of the intervention.
Earlier Extubation Did Not Establish Shorter Length of Stay
Median ICU stay was 58.2 hours in the pathway group and 79.0 hours with usual care, but the difference was not statistically clear. Median hospital stay was essentially unchanged at 7.9 versus 7.8 days. The study therefore does not demonstrate that earlier extubation reduces hospital resource use or costs.
There were no reintubations within 24 hours in the pathway group and one in the usual-care group. These small counts cannot establish equivalent or superior safety. Acute kidney injury occurred in 10 pathway patients versus five usual-care patients, and one cerebrovascular event occurred in the pathway group; these comparisons were also imprecise and do not establish causation.
Feasibility Was Mixed Across Centers
Four of five prespecified feasibility criteria were met at both hospitals. Consent reached 98%, study drug delivery was complete without administration errors, and no participants dropped out. Recruitment capacity, however, reached 1.28 eligible patients per week at one hospital and 2.07 at the other; only the latter exceeded the prespecified threshold of two eligible patients per week.
This distinction matters when planning a definitive multicenter trial. A pathway may be deliverable once patients enter a study while the recruitment assumptions needed to complete a larger trial remain uncertain.
Relevance to Perfusion and Cardiac Teams
All participants underwent CABG with cardiopulmonary bypass, making the study relevant to coordinated perioperative recovery discussions. It evaluated anesthesia and extubation management, rather than a new pump-flow, oxygen-delivery, temperature, or anticoagulation strategy. It should not be used to justify changing perfusion targets.
For multidisciplinary review, the practical questions concern patient selection, reliable handover, readiness assessment, and whether earlier extubation translates into broader recovery benefits. The trial supports further evaluation of coordinated care, while leaving those broader outcomes unresolved.
Limitations and Clinical Interpretation
This was a small feasibility trial with exploratory efficacy comparisons. It was not powered to detect uncommon harms or definitive differences in resource use. Findings may not apply to patients with ventricular dysfunction, emergency or redo surgery, valve procedures, or complex aortic operations.
Bradycardia and hypotension were recorded as sustained or intervention-requiring events through daily record review, rather than continuous electronic capture of every threshold excursion. The absence of recorded events cannot exclude transient episodes or uncommon medication-related complications. Two planned recovery outcomes were not assessed because dedicated research nursing funding was unavailable.
The substantial difference in early extubation is encouraging, but a larger trial is needed to determine effectiveness, patient-centered recovery, and safety before routine adoption of this specific bundle.
Source and Disclosures
Weinberg L, Raykateeraroj N, Pillai P, et al. Fast-track cardiac anaesthesia and early extubation pathway versus usual care for adults undergoing coronary artery bypass graft surgery: a two-centre pilot randomised controlled feasibility trial in Victoria, Australia. BMJ Open. 2026;16:e125544. doi:10.1136/bmjopen-2026-125544.
The authors declared no competing interests and no specific grant for this research. Trial registration: ACTRN12625001245482. The source article is open access under CC BY-NC. This independent IPA educational summary accompanies the unchanged source PDF below.
