Noncardiac Surgery Research Articles

Relationship between intraoperative hypothermia and hyperthermia with postoperative pulmonary infection and surgical site infection in major non-cardiac surgery.

Surgical patients often experience intraoperative hypothermia or hyperthermia. However, the relationship of intraoperative hypothermia and hyperthermia with postoperative pulmonary infection (PPI) and surgical site infection (SSI) is unclear. Here, we conducted a retrospective cohort study to address these issues. Adult patients who underwent major non-cardiac surgery under general anesthesia were eligible for the study and were recruited. Three indices of core body temperature under hypothermia (<36°C) and hyperthermia (>37.3°C) were calculated as mentioned in the following: absolute value (0C), duration of exposure (min), and area under the curve (AUC,°C× min). The outcomes were in-hospital PPI and SSI. The risk-adjusted association of intraoperative hypothermia and hyperthermia with PPI and SSI was determined. The absolute value (the nadir value of hypothermia and the peak value of hyperthermia) was not associated with PPI and SSI. PPI was associated with (1) duration: hypothermia >90 min [adjusted odds ratio (aOR): 1.425, 95% confidence interval (CI): 1.131-1.796] and hyperthermia >75 min (aOR: 1.395, 95%CI: 1.208-1.612) and (2) AUC: hypothermia >3,198 (aOR: 1.390, 95%CI: 1.128-1.731) and hyperthermia >7,945 (aOR: 2.045, 95%CI: 1.138-3.676). SSI was associated with (1) duration: hypothermia > 195 min (aOR: 2.900, 95%CI: 1.703-4.937) and hyperthermia >75 min (aOR: 1.395, 95%CI: 1.208-1.612) and (2) AUC: hypothermia >6,946 (aOR: 2.665, 95%CI: 1.618-4.390), hyperthermia >7,945 (aOR: 2.619, 95%CI: 1.625-4.220). Interactions were not observed between hyperthermia and hypothermia on the outcomes. It was observed that intraoperative hypothermia and hyperthermia are associated with postoperative pulmonary infection and surgical site infection in major non-cardiac surgery.

Transitions from Aerobic to Anaerobic Metabolism and Oxygen Debt during Elective Major and Emergency Non-Cardiac Surgery.

Intraoperative hemodynamic and metabolic optimization of both the high-risk surgical patients and critically ill patients remains challenging. Reductions in oxygen delivery or increases in oxygen consumption can initiate complex cellular processes precipitating oxygen debt (OXD). This study tested the hypothesis that intraoperative changes in sublingual microcirculatory flow reflect clinically relevant transitions from aerobic to anaerobic metabolism (TRANAM). We included patients undergoing elective major and emergency non-cardiac surgery. Macro- and microcirculatory variables, oxygen extraction, and transitions of metabolism were assessed in both cohorts. In the elective group, OXD was progressively increased over time, with an estimated 2.24 unit increase every 30 min (adjusted p < 0.001). Also, OXD was negatively correlated with central venous pressure (ρ = -0.247, adjusted p = 0.006) and positively correlated with stroke volume variation (ρ = 0.185, adjusted p = 0.041). However, it was not significantly correlated with sublingual microcirculation variables. In the emergency surgery group, OXD increased during the first two intraoperative hours and then gradually decreased until the end of surgery. In that cohort, OXD was positively correlated with diastolic arterial pressure (ρ = 0.338, adjpatients and the critically ill patients remains challengingsted p = 0.015). Also, OXD was negatively correlated with cardiac index (ρ = -0.352, adjusted p = 0.003), Consensus Proportion of Perfused Vessels (PPV) (ρ = -0.438, adjusted p < 0.001), and Consensus PPV (small) (ρ = -0.434, adjusted p < 0.001). TRANAM were evident in both the elective major and emergency non-cardiac surgery cohorts independent of underlying alterations in the sublingual microcirculation.

Protective effect of sevoflurane on myocardial ischemia-reperfusion injury: a systematic review and meta-analysis.

Myocardial ischemia-reperfusion (I/R) injury significantly impacts recovery in both cardiac and non-cardiac surgeries, potentially leading to severe cardiac dysfunction. Sevoflurane, a volatile anesthetic, is reputed for its protective effects against myocardial I/R injury, although evidence remains inconclusive. This systematic review and meta-analysis aim to clarify the cardioprotective efficacy of sevoflurane. The systematic search of databases including Medline, Embase, Scopus, and Web of Science, was supplemented with a manual search to retrieve studies using rat or mouse models of myocardial I/R injury, comparing sevoflurane pretreatment (≥ 24 hours before I/R), preconditioning (within 24 hours before I/R), or post-conditioning (after I/R) against non-treated controls. The outcomes were cardiac function, myocardial infarct size, apoptosis, inflammation, oxidative stress, and cardiac biomarkers. Using the random effects model, standardized mean differences (SMD) were pooled to perform meta-analyses. Fifty-one studies, encompassing 8189 subjects, were included in the meta-analysis. Pretreatment with Sevoflurane significantly reduced infarct size. Sevoflurane preconditioning exhibited positive effects on left ventricular parameters and ejection fraction, and reduced infarct size, apoptosis, and oxidative stress. Post-conditioning with Sevoflurane demonstrated improvements in cardiac function, including enhanced left ventricular parameters and reduced infarct size, apoptosis, inflammation, oxidative stress, and cardiac biomarkers. Sevoflurane demonstrates a significant protective effect against myocardial I/R injury in animal models. These findings support the potential clinical utility of sevoflurane as an anesthetic choice in preventing and managing myocardial I/R injury during surgeries.

Risk factors for acute kidney injury in preterm neonates after noncardiac surgery: a single-center retrospective cohort study

Postoperative acute kidney injury (AKI) is a common complication that is associated with chronic kidney disease, early postsurgical mortality, and prolonged hospital stays. Preterm neonates who undergo surgery are at risk factors for AKI due to underdeveloped kidneys. To date, little is known about the incidence and perioperative risk factors for AKI in preterm neonates undergoing noncardiac surgery. Preterm neonates who underwent noncardiac surgery between January May 1, 2020, and February 28, 2023, were enrolled in the trial according to the inclusion criteria. Both multivariable and logistic regression analyses were used to analyze the associations between characteristic data and AKI. In total, 106 preterm neonates met the inclusion criteria, and 25 preterm neonates (23.6%) developed postoperative AKI. Multivariate analysis revealed that the factors associated with AKI were gestational age < 32 weeks [OR: 4.88; 95% CI (1.23–19.42)], preoperative sepsis [OR: 3.98; 95% CI (1.29–12.28)], and intraoperative hypotension [OR: 3.75; 95% CI (1.26–11.15)]. Preterm neonates who developed AKI were more likely to have longer hospital length of stays (38 [18,69] days vs. 21[12,46]) and higher medical costs (93,181.6 [620450.0,173,219.0] ￥ vs. 58,134.6 [31015.1,97,224,1) ￥ than neonates who did not develop AKI. Preterm neonates who underwent noncardiac surgery had a high incidence of AKI. Independent risk factors for AKI in preterm neonates who underwent noncardiac surgery were low gestational age, preoperative sepsis, and intraoperative hypotension. Preterm neonates who developed AKI were more likely to have longer hospital stays and higher medical costs.

Aspirin Monotherapy vs No Antiplatelet Therapy in Stable Patients With Coronary Stents Undergoing Low-to-Intermediate Risk Noncardiac Surgery.

Current guidelines recommend the perioperative continuation of aspirin in patients with coronary drug-eluting stents (DES) undergoing noncardiac surgery. However, supporting evidence is limited. This study aimed to compare continuing aspirin monotherapy vs temporarily holding all antiplatelet therapy before noncardiac surgery in patients with previous DES implantation. We randomly assigned patients who had received a DES >1 year previously and were undergoing elective noncardiac surgery either to continue aspirin or to discontinue all antiplatelet agents 5days before noncardiac surgery. Antiplatelet therapy was recommended to be resumed no later than 48 hours after surgery, unless contraindicated. The primary outcome was a composite of death from any cause, myocardial infarction, stent thrombosis, or stroke between 5days before and 30days after noncardiac surgery. A total of 1,010 patients underwent randomization. Among 926 patients in the modified intention-to-treat population (462 patients in aspirin monotherapy group and 464 patients in the no-antiplatelet therapy group), the primary composite outcome occurred in 3 patients (0.6%) in the aspirin monotherapy group and 4 patients (0.9%) in the no antiplatelet group (difference, -0.2 percentage points; 95%CI:-1.3 to 0.9; P > 0.99). There was no stent thrombosis in either group. The incidence of major bleeding did not differ significantly between groups (6.5% vs 5.2%; P=0.39), whereas minor bleeding was significantly more frequent in the aspirin group (14.9% vs 10.1%; P = 0.027). Among patients undergoing low-to-intermediate risk noncardiac surgery >1 year after stent implantation primarily with a DES, in the setting of lower-than-expected event rates, we failed to identify a significant difference between perioperative aspirin monotherapy and no antiplatelet therapy with respect to ischemic outcomes or major bleeding. (Perioperative Antiplatelet Therapy in Patients With Drug-eluting Stent Undergoing Noncardiac Surgery [ASSURE-DES]; NCT02797548).

Coronary heart disease increases the risk of perioperative ischemic stroke after noncardiac surgery: A retrospective cohort study.

To investigate the association between coronary heart disease (CHD) and the risk of perioperative ischemic stroke in patients undergoing noncardiac surgery. This retrospective study evaluated the incidence of ischemic stroke within 30 days after a noncardiac surgery. A cohort of 221,541 patients who underwent noncardiac surgery between January 2008 and August 2019 was segregated according to whether they were diagnosed with CHD. Primary, sensitivity, and subgroup logistic regression analyses were conducted to confirm that CHD is an independent risk factor for perioperative ischemic stroke. Propensity score matching analysis was used to account for the potential residual confounding effect of covariates. Among the 221,541 included patients undergoing noncardiac surgery, 484 patients (0.22%) experienced perioperative ischemic stroke. The risk of perioperative ischemic stroke was higher in patients with CHD (0.7%) compared to patients without CHD (0.2%), and multivariate logistic regression analysis showed that CHD was associated with a significantly increased risk of perioperative ischemic stroke (odds ratio (OR), 3.7943; 95% confidence interval (CI) 2.865-4.934; p < 0.001). In a subset of patients selected by propensity score matching (PSM) in which all covariates between the two groups were well balanced, the association between CHD and increased risk of perioperative ischemic stroke remained significantly significant (OR 1.8150; 95% CI, 1.254-2.619; p = 0.001). In the subgroup analysis stratified by age, preoperative β-blockers, and fibrinogen-to-albumin ratio (FAR), the association between CHD and perioperative ischemic stroke was stable (p for interaction >0.05). Subgroup analyses also showed that CHD was significantly increased the risk of perioperative ischemic stroke in the preoperative mean arterial pressure (MAP) ≥94.2 mmHg subgroups (p for interaction <0.001). CHD is significantly associated with an increased risk of perioperative ischemic stroke and is an independent risk factor for perioperative ischemic stroke after noncardiac surgery. Strict control of preoperative blood pressure may reduce the risk of perioperative ischemic stroke for patients with CHD undergoing noncardiac surgery.

Temporal Trends in the Management Practices of Clinically Important Perioperative Atrial Fibrillation After Noncardiac Surgery

BackgroundClinically important perioperative atrial fibrillation (POAF) is a common cardiac complication after noncardiac surgery. Little is known about how patients with POAF are managed acutely and whether practices have changed over time. MethodsWe conducted an observational substudy of patients who had POAF, were at elevated cardiovascular risk, and were enrolled in the PeriOperative Ischemic Evaluation (POISE)-1, 2 and 3 trials between 2002 and 2021. POAF was defined as new, clinically important atrial fibrillation occurring within 30 days after surgery. We assessed the use of rhythm-control and anticoagulation treatment in response to POAF, at hospital discharge and at 30 days after surgery. We assessed for temporal trends using multivariable logistic regression. ResultsOf the 27,896 patients included, 545 (1.9%) developed clinically important POAF. Patients received rhythm-control treatment in 48.6% of cases. The level of use of rhythm-control treatment increased over the course of the trials (POISE-1 vs POISE-2 vs POISE-3; 40.9% vs 49.5% vs 59.1%). A later randomization date was associated independently with use of rhythm-control treatment (odds ratio, 1.05 per year; 95% confidence interval, 1.01-1.09). Anticoagulation treatment was prescribed in 21% of POAF cases. The level of anticoagulation treatement use was higher in POISE-3, compared to that in the 2 previous trials (POISE-1 vs POISE-2 vs POISE-3—16.4% vs 16.5% vs 33.6%). A later randomization date was associated independently with use of anticoagulation treatment (odds ratio, 1.06 per year; 95% confidence interval, 1.02-1.11). ConclusionsDespite the absence of randomized controlled trials, the level of use of rhythm-control and anticoagulation treatment for POAF is rising. High-quality trials are needed urgently to determine whether these interventions are safe and effective in this population.

Assessment of perioperative cardiac risk using preoperative quantitative flow ratio in patients with coronary artery disease undergoing noncardiac surgery: a retrospective cohort study.

Quantitative flow ratio (QFR) is a novel diagnostic modality for the functional testing of coronary artery stenosis, but evidence concerning the postoperative prognostic implication of QFR in noncardiac surgery (NCS) of patients with coronary artery disease (CAD) is limited. The purpose of this study was to examine the role of QFR in perioperative risk prediction in patients with coronary heart disease. This retrospective cohort study was conducted in The First Affiliated Hospital of Wenzhou Medical University between 2013 and 2022, and consecutively included patients with CAD who had undergone NCS <1 year after coronary angiography. The primary endpoint was major adverse cardiovascular events (MACEs), which were defined as a composite of cardiovascular death, nonfatal myocardial infarction, nonfatal stroke, cardiopulmonary arrest, malignant ventricular arrhythmia (MVA), congestive heart failure, and revascularization. Univariate and multifactorial Cox regression was used to identify the independent risk factors for perioperative cardiovascular events and to construct new models. The area under the curve (AUC), net reclassification improvement (NRI), and integrated discrimination improvement (IDI) were used to compare the newly constructed model with existing traditional models. Among the 929 participants enrolled (median age 68 years; 72.0% male), the primary endpoint was met in 67 (7.2%) patients within 30 days of follow-up. There was no significant difference in the incidence of the primary endpoint between patients with QFR <0.75 and those with "gray zone" lesions (0.75≤ QFR ≤0.8) (log-rank P=0.325). Patients with QFR <0.75 and those with "gray zone" lesions (0.75≤ QFR ≤0.8) had a higher incidence of primary endpoint events compared to patients with QFR >0.8. [QFR <0.75 vs. QFR >0.8: adjusted hazard ratio (HR) =20.70, P<0.001; 0.75≤ QFR ≤0.8 vs. QFR >0.8: HR =15.99, P<0.001]. The independent predictors of MACEs events within 30 days after NCS were albumin level [HR =0.92, 95% confidence interval (CI): 0.87-0.98; P=0.008], emergency surgery (HR =4.12, 95% CI: 1.66-10.23; P=0.002), and QFR ≤0.8 (HR =15.92, 95% CI: 5.96-42.51; P<0.001). In addition, adjusting the original Revised Cardiac Risk Index (RCRI) with QFR ≤0.8 as a risk factor significantly improved the risk stratification of postoperative adverse events, with the adjusted AUC rising from 0.574 to 0.740 (P<0.001). QFR ≤0.8 could independently predict perioperative cardiovascular adverse events in patients with CAD undergoing NCS and improve the predictive value of original predictive index. Gray-zone lesions (0.75≤ QFR ≤0.8) should be actively treated.

Outcomes of Neonatal Cardiac Surgery: A European Congenital Heart Surgeons Association Study

BackgroundWe evaluated outcomes of neonatal cardiac surgery at hospitals affiliated with the European Congenital Heart Surgeons Association (ECHSA). MethodsAll patients ≤30 days of life undergoing a cardiac surgical procedure during a 10-year period between January 2013 and December 2022 were selected from the ECHSA Congenital Database. Reoperations during the same hospitalization, percutaneous procedures, and noncardiac surgical procedures were excluded. We identified 12 benchmark operations. Primary outcomes were 30-day mortality and in-hospital mortality. Multivariable logistic regression analysis was performed to determine independent factors associated with higher mortality. Mortality between the first 5 years and second 5 years was also compared. ResultsThe overall number of neonatal operations from 2013 to 2022 was 30,931, and 22,763 patients met the inclusion criteria of the study. The 4 most common procedures were arterial switch operation (3520 of 22,763 [15.5%]), aortic coarctation repair (3204 of 22,763 [14.1%]), shunt procedure (2351 of 22,763 [10.3%]), and Norwood operation (2115 of 22,763 [9.23%]). The 30-day mortality rate was as follows: overall population, 5.9% (1342 of 22,763); arterial switch, 3.13% (110 of 3520); Norwood operation, 16.0% (339 of 2115); and hybrid operation, 15.4% (94 of 609). In-hospital mortality rate was as follows: overall population, 9.1% (2074 of 22,763); arterial switch, 4.12% (145 of 3520); Norwood operation, 24.7% (523 of 2115); and hybrid operation, 30.5% (186 of 609). Multivariable analysis revealed that major factors impacting mortality were high-risk procedures (adjusted odds ratio, 2.74; 95% CI, 2.33-3.23; P < .001), and the need for extracorporeal membrane oxygenation (11.8; 95% CI, 9.9-14; P < .001). ConclusionsNeonatal cardiac surgery continues to pose a significant challenge, with notable mortality, particularly for neonates with functionally univentricular physiology. These data can serve as important benchmarks across Europe and offer insights regarding opportunities for improvement.

Under pressure: symptomatic pulmonary hypertension is a predictor of poor outcome following hip fracture.

Pulmonary hypertension (PHTN) is associated with increased morbidity and mortality in noncardiac surgery and elective surgery. This population of patients has a low physiological reserve and is prone to cardiac arrest as a result. This study aims to identify the impact that PHTN has on outcomes among geriatric hip fracture patients. A 3:1 propensity-score-matched retrospective case (PHTN)-control (no PHTN [N]) study of hip fracture patients from 2014 to 2022 was performed. Patients were matched utilizing propensity score matching of a validated geriatric trauma risk assessment tool (STTGMA). All patients were reviewed for hospital quality measures and outcomes. Comparative univariable and multivariable analyses were conducted between the two matched cohorts. A sub-analysis compared patients across PHTN severity levels (mild, moderate, severe) based on pulmonary artery systolic pressures (PASP) as measured by transthoracic echocardiogram. PHTN patients (n = 67) experienced a higher rate of inpatient, 30-day, and 1-year mortality, major complications, and 90-day readmissions as compared to the N cohort (n = 201). PHTN patients with a PASP > 60 experienced a significantly higher rate of major complications, need for ICU, longer admission length, and worse 1-year functional outcomes. Pulmonary hypertension was found to be independently associated with a 3.5 × higher rate of 30-day mortality (p = 0.016), 2.7 × higher rate of 1-year mortality (p = 0.008), 2.5 × higher rate of a major inpatient complication (p = 0.028), and 1.2 × higher rate of 90-day readmission (p = 0.044). Patients who had a prior diagnosis of pulmonary hypertension before sustaining their hip fracture experienced significantly worse inpatient and post-discharge outcomes. Those with a PASP > 60mmHg had worse outcomes within the PHTN cohort. Providers must recognize these at-risk patients at the time of arrival to adjust care planning accordingly. III.

Postoperative Cognitive Dysfunction: A Review.

Elderly patients are more vulnerable to cognitive dysfunction in the postoperative period. Patients who are apparently well in cognitive functions in the preoperative period after undergoing anesthesia in noncardiac surgery will develop symptoms of cognitive dysfunction. Postoperative cognitive dysfunction (POCD) doesn't continue for a long duration and usually undergoes self-resolution. Proper definitions and congruous tests for diagnosis are absent. Rigorous preoperative assessment of cognitive function and distinguishing risk factors are indispensable for recognizing the range of POCD and its association with surgery and anesthesia. Recent studies haven't revealed any anesthesia technique or drug which can significantly reduce the incidence of POCD. Therefore, giving accurate information to patients can be challenging.

Association of Previous Cardiac Surgery With Postoperative Pneumonia in Infants Undergoing Abdominal Operations: A Cohort Study

BackgroundChildren with congenital heart disease (CHD) often require other, non-cardiac related surgical procedures following their initial cardiac surgery. After full or partial CHD repair, they remain at increased risk of postoperative complications. We examined the association of previous cardiac intervention (surgery or percutaneous catheterization intervention) with postoperative pneumonia in infants undergoing abdominal general surgery. MethodsA 1:1 propensity score-matched study was conducted using a retrospective cohort of 104,820 infants (<12 months) who had general abdominal surgeries between 2012 and 2022 in U.S. hospitals participating in the National Surgical Quality Improvement Program. The primary outcome was postoperative pneumonia within 30 days. Secondary outcomes included unplanned reintubation, prolonged mechanical ventilation (>72 h), and extended hospital stay (>75th percentile for the study cohort). ResultsOf the study cohort, 9736 infants (9.3%) had previous cardiac interventions. In the propensity score-matched sample, infants with previous cardiac surgery had increased risks of postoperative pneumonia (1.3% vs 0.8%; adjusted relative risk [RRadj]: 1.64, 95% CI: 1.22, 2.18, p = 0.001), unplanned reintubation (57.8% vs 32.6%; RRadj: 1.77, 95% CI: 1.77, 1.85, p < 0.001), prolonged mechanical ventilation (5.0% vs 2.3%; RRadj: 2.14, 95% CI: 1.83, 2.52, p < 0.001), and prolonged hospital stays (61.0% vs 53.8%; RRadj: 1.13, 95% CI: 1.10, 1.17, p < 0.001). ConclusionsA history of previous cardiac intervention carries an increased risk of postoperative pneumonia, unplanned tracheal reintubation, prolonged mechanical ventilation, as well as longer hospital stays following intra-abdominal surgery. Clinicians should closely monitor these patients for respiratory complications after surgery. Level of evidenceII.

Cognitive Training to Reduce Memory Disturbance Associated With Postoperative Cognitive Impairment After Elective Noncardiac Surgery: An Experimental Study

Assess the efficiency of a cognitive training program using an artificial intelligence application to optimize cognitive reserve and reduce memory disturbance in patients aged 55 to 75 after Class II-III elective noncardiac surgery. Experimental with random assignment. The study was conducted on 80 patients undergoing surgery at the Teknon Medical Center Hospital in Barcelona, from April 2018 to June 2021. Both groups were evaluated with cognitive tests before surgery and 7 and 30 days after surgery. The experimental group was subjected to cognitive training for 10 days before surgery to improve their cognitive reserve. Significant differences were found between the study groups 30 days after surgery in the three screening tests (Mini-Cog, T@M, and MFE). The intervention group presented with fewer cognitive and memory alterations. Age and pre-existing comorbidities were not correlated with an impact on memory impairment or cognitive function. A cognitive training program based on artificial intelligence, prescribed and monitored by anesthesia nurses has a positive impact on increasing cognitive reserve and reducing memory disturbance in patients aged 55 to 75 undergoing Class II to III elective, noncardiac surgery. This intervention may serve as a prehabilitation strategy in patients with a risk of cognitive dysfunction evaluated by anesthesia nurses for the purpose of preserving their cognitive function and optimizing their recovery.

Периоперационное ведение пациентов с артериальной гипертензией. Методические рекомендации Общероссийской общественной организации «Федерация анестезиологов и реаниматологов»

Arterial hypertension is the most common and socially significant disease among the adult population, which is associated with the development of cardiovascular and other complications during non-cardiac surgery. In 2020, the all-Russian public organization Federation of Anesthesiologists and Intensive Care Specialists developed recommendations for the perioperative management of patients with concomitant hypertension, which have no analogues in the world literature. In the second edition, from the standpoint of evidence-based medicine, the section of preoperative assessment was expanded by substantiating functional tests and instruments for stratification of cardiac risk, the tactics of antihypertensive therapy in the perioperative period were clarified, safe target thresholds of blood pressure during anesthesia were reasoned, including the variability and duration of this indicator. The recommendations are intended for anesthesiologists and intensive care specialists, but they will also be useful for students, clinical residents, graduate students and doctors of all surgical specialties.

Anesthetic key points in a patient with a terminal ileum neuroendocrine tumor and a rare carcinoid left heart disease presented for non-cardiac surgery: case report

BackgroundCarcinoid tumors are rare neuroendocrine malignancies presenting in an increasing number in our center. The incidence of carcinoid tumors is approximatively between 2.5 and 5 cases per 100,000 people of whom about 50% develop carcinoid syndrome. Once the carcinoid syndrome has developed, a carcinoid cardiomyopathy can occur. Carcinoid heart disease (CaHD) remains a serious and rare complication associated with a significant increase in morbidity and mortality. Although carcinoid tumors have been known and studied for several years, there are still scarce data on the anesthetic management and the peri operative period.Case presentationWe describe a case of a Caucasian 44-year-old woman with an unusual presentation of left CaHD with an ileal neuroendocrine tumor and liver metastases. Our preoperative somatostatin administration protocol, limit the cardiac damage. The maintenance of stable hemodynamics, the use of balanced anesthetic technique, all along with a good understanding of the pathology, played a major role in the successful management of anesthesia. This case report allows us to introduce our decision algorithm for the management of this type of pathology in our tertiary hospital, Cliniques Universitaires Saint-Luc.ConclusionDespite the paucity of data, anesthetic management of patients with carcinoid tumor can be safely performed with effective hemodynamic monitoring and a good understanding of the pathophysiology. Knowledge and application of a clear institutional algorithm for octreotide administration and multidisciplinary consultation at a referral center are essential for the management of these patients.

Paediatric postoperative acute kidney injury after non-cardiac surgery: Protocol for a systematic review and meta-analysis.

Paediatric acute kidney injury (AKI) is associated with significant adverse outcomes such as increased mortality, progression to chronic kidney disease and longer length of stay in hospital. Postoperative AKI is a common and recognized complication after surgery in adults. In the paediatric population, AKI postoperatively to cardiac surgery has been extensively studied. However, the incidence of postoperative AKI after non-cardiac surgery is less clear. Therefore, we aim to assess the available literature on this topic. We will conduct a systematic review of observational and randomized controlled trials assessing the incidence of paediatric postoperative AKI after non-cardiac surgery. Pairs of reviewers will independently screen the literature and extract data and assess risk of bias from eligible studies. The databases Pubmed, Cochrane and Web of Sciences will be searched. We will conduct the review in accordance with the Preferred Reporting Items for Systematic Review and Meta-Analysis (PRISMA) guidelines and the Grading of Recommendation, Assessment, Development and Evaluation (GRADE) approach. If sufficient homogeneity within the included trials we will conduct meta-analyses. This systematic review aims to investigate the incidence of postoperative AKI in the paediatric non-cardiac surgery population. The results of this review will provide a foundation for future research in the field of paediatric postoperative AKI.

Balloon Aortic Valvuloplasty as a Bridge to Non-Cardiac Surgery: A Systematic Review and Meta-Analysis

Balloon Aortic Valvuloplasty as a Bridge to Non-Cardiac Surgery: A Systematic Review and Meta-Analysis

Management of Acute Coronary Syndromes in Older People: Comprehensive Review and Multidisciplinary Practice-Based Recommendations.

Managing health care for older adults aged 75 years and older can pose unique challenges stemming from age-related physiological differences and comorbidities, along with elevated risk of delirium, frailty, disability, and polypharmacy. This review is aimed at providing a comprehensive analysis of the management of acute coronary syndromes (ACS) in older patients, a demographic substantially underrepresented in major clinical trials. Because older patients often exhibit atypical ACS symptoms, a nuanced diagnostic and risk stratification approach is necessary. We aim to address diagnostic challenges for older populations and highlight the diminished sensitivity of traditional symptoms with age, and the importance of biomarkers and imaging techniques tailored for older patients. Additionally, we review the efficacy and safety of pharmacological agents for ACS management in older people, emphasizing the need for a personalized and shared decision-making approach to treatment. This review also explores revascularization strategies, considering the implications of invasive procedures in older people, and weighing the potential benefits against the heightened procedural risks, particularly with surgical revascularization techniques. We explore the perioperative management of older patients experiencing myocardial infarction in the setting of noncardiac surgeries, including preoperative risk stratification and postoperative care considerations. Furthermore, we highlight the critical role of a multidisciplinary approach involving cardiologists, geriatricians, general and internal medicine physicians, primary care physicians, and allied health, to ensure a holistic care pathway in this patient cohort.

Preoperative forced expiratory volume in one second and postoperative respiratory outcomes in nonpulmonary and noncardiac surgery: a retrospective cohort study

BackgroundAlthough the usefulness of pulmonary function tests has been established for lung resection and coronary artery bypass surgeries, the association between preoperative pulmonary function test and postoperative respiratory complications in nonpulmonary and noncardiac surgery is inconclusive. The purpose of this study was to determine the association between preoperative forced expiratory volume in one second (FEV1) on pulmonary function test and the development of postoperative respiratory failure and/or death in patients undergoing major nonpulmonary and noncardiac surgery.MethodsAdult patients aged ≥ 18 years and who underwent nonpulmonary and noncardiac surgery with expected moderate to high risk of perioperative complications from June 2012 to March 2019 were included. The primary exposure was preoperative FEV1 measured by pulmonary function test within six months before surgery. The primary outcome was respiratory failure (i.e., invasive positive pressure ventilation for at least 24 h after surgery or reintubation) and/or death within 30 days after surgery. A logistic regression model was used to adjust for the respiratory failure risk index, which is a scoring system that predicts the probability of postoperative respiratory failure based on patient and surgical factors, and to examine the association between preoperative FEV1 and the development of postoperative respiratory failure and/or death.ResultsRespiratory failure and/or death occurred within 30 days after surgery in 52 (0.9%) of 5562 participants. The incidence of respiratory failure and/or death in patients with FEV1 ≥ 80%, 70%– < 80%, 60%– < 70%, and < 60% was 0.9%, 0.6%, 1.7%, and 1.2%, respectively. Multivariable logistic regression analysis showed no significant association between preoperative FEV1 and postoperative respiratory failure and/or death (adjusted odds ratio per 10% decrease in FEV1: 1.01, 95% confidence interval: 0.88–1.17, P = 0.838). Addition of FEV1 information to the respiratory failure risk index did not improve the prediction of respiratory failure and/or death [area under the receiver operating characteristics curve: 0.78 (95% confidence interval: 0.72–0.84) and 0.78 (95% confidence interval: 0.72–0.84), respectively; P = 0.84].ConclusionWe found no association between preoperative FEV1 and postoperative respiratory failure and/or death in patients undergoing major nonpulmonary and noncardiac surgery.

Machine Learning Predicts Unplanned Care Escalations for Post-Anesthesia Care Unit Patients during the Perioperative Period: A Single-Center Retrospective Study

Background: Despite low mortality for elective procedures in the United States and developed countries, some patients have unexpected care escalations (UCE) following post-anesthesia care unit (PACU) discharge. Studies indicate patient risk factors for UCE, but determining which factors are most important is unclear. Machine learning (ML) can predict clinical events. We hypothesized that ML could predict patient UCE after PACU discharge in surgical patients and identify specific risk factors. Methods: We conducted a single center, retrospective analysis of all patients undergoing non-cardiac surgery (elective and emergent). We collected data from pre-operative visits, intra-operative records, PACU admissions, and the rate of UCE. We trained a ML model with this data and tested the model on an independent data set to determine its efficacy. Finally, we evaluated the individual patient and clinical factors most likely to predict UCE risk. Results: Our study revealed that ML could predict UCE risk which was approximately 5% in both the training and testing groups. We were able to identify patient risk factors such as patient vital signs, emergent procedure, ASA Status, and non-surgical anesthesia time as significant variable. We plotted Shapley values for significant variables for each patient to help determine which of these variables had the greatest effect on UCE risk. Of note, the UCE risk factors identified frequently by ML were in alignment with anesthesiologist clinical practice and the current literature. Conclusions: We used ML to analyze data from a single-center, retrospective cohort of non-cardiac surgical patients, some of whom had an UCE. ML assigned risk prediction for patients to have UCE and determined perioperative factors associated with increased risk. We advocate to use ML to augment anesthesiologist clinical decision-making, help decide proper disposition from the PACU, and ensure the safest possible care of our patients.