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Laparoscopy, as the most frequently chosen surgical technique in the world, carries specific complications and distinctions in anesthetic management. Complications of laparoscopy, particularly perceptible as disorders of the physiology of the cardiovascular, respiratory, and nervous systems, are caused by the specific technical conditions required for this type of operation. To facilitate surgical access and to clarify the surgical field, it is necessary to create a splenic emphysema, consisting of filling the peritoneal cavity with carbon dioxide (CO₂). This results in an increase in intra-abdominal pressure (IAP) and increased diffusion of CO₂ into the blood, causing a state of hypercarbia. The impact of these disturbances is of great importance in the pathological functioning of the above-mentioned organ systems. The anesthetist, in addition to the need to induce a state of general anesthesia, must be aware of and understand the pathological impact of increased intracranial pressure (ICP) and hypercarbia to adjust patient monitoring accordingly and implement appropriate treatment targeting the specific complications occurring during laparoscopy. Complications and contraindications important from the anesthetist's point of view are also described. The 51 articles and reference texts were used for this purpose, which, combined with the authors' knowledge and experience, is intended to be a valuable resource for use by anesthesiology staff. This article aims to explain the effects of laparoscopy on human physiology and to compare and contrast methods of airway management, mechanical ventilation, the type of muscle relaxation used, and postoperative management in patients undergoing laparoscopic surgery.

The Animal Research: Reporting of In Vivo Experiments (ARRIVE) guidelines, along with the updated ARRIVE 2.0, provide a crucial framework for transparent reporting in animal research. These guidelines enhance the quality and reproducibility of studies while supporting animal welfare. However, concerns persist regarding the reporting practices of biomedical researchers in scientific articles related to anesthesia and analgesia despite the endorsement of ARRIVE guidelines, as has been demonstrated in previous descriptive analyses. The current study systematically reviews articles published from 2016 to 2023 that involve rodent orthopedic surgeries. These procedures were selected as our focus given that anesthetics and analgesics are essential for such high impact procedures. We highlight significant reporting gaps, noting that anesthetic and analgesic details were missing in 29.4% and 74.8% of the articles, respectively. Our findings reveal no correlation between reporting completeness and journal impact factors, indicating that this issue generalized across journals. Furthermore, among articles that did report analgesia use, we observed a low prevalence of multimodal analgesia. Overall, this study underscores the urgent need to develop effective strategies to improve reporting of anesthesia and analgesia in animal studies to enhance ethical standards, animal welfare, and the robustness and reproducibility of research., Competing Interests: Declarations Competing interests The authors declare no competing financial or non-financial interests., (© 2024. The Author(s).)

This study aimed to develop and validate a risk prediction model based on real-world data to assess the risk of delayed recovery from anesthesia in elderly lung adenocarcinoma patients underwent video-assisted thoracoscopic (VATS) radical resection. This study is a retrospective study of real-world data. A total of 257 elderly lung adenocarcinoma patients who underwent VATS radical resection from January 2022 to December 2023 in a tertiary hospital in Wuhan were selected. Patients were divided into delayed recovery (n = 42) and non- delayed recovery group (n = 215) according to whether delayed recovery occurred after anesthesia. Lasso regression was used to screen the independent variables. Logistic regression was used to analyze the risk factors of delayed recovery from anesthesia, and a nomogram model was established. Bootstrap method was used to internally verify the nomogram model. Delayed recovery from anesthesia occurred in 42 of 257 elderly lung adenocarcinoma patients underwent VATS radical resection (16.34%). Logistic regression analysis showed that anesthesia duration, intraoperative infusion volume, inhaled desflurane, preoperative respiratory tract infection, intraoperative hypothermia and diagnosed with hypertension were risk factors for delayed recovery from anesthesia in elderly lung adenocarcinoma patients underwent VATS radical resection (P < 0.05). The area under receiver operating characteristic curve was 0.869, 95% CI (0.815 ~ 0.923). The optimal cutoff value was 0.198, the sensitivity was 0.738, and the specificity was 0.823. Hosmer-Lemeshow test showed that χ 2  = 7.346, P = 0.500. The decision curve analysis results have shown that the threshold probability is between 0.23 and 0.91, and the net benefit rate of the model is good. The risk prediction model constructed in this study can provide reference for medical staff to screen precisely high-risk of delayed recovery from anesthesia in elderly lung adenocarcinoma patients underwent VATS radical resection, which is of great significance., Competing Interests: Competing interests The authors declare no competing interests., (© 2024. The Author(s).)

A toddler presented with significant weight loss and lethargy. His CT scan chest revealed a sizeable anterior mediastinal mass of 14.5×12.0×7.0 cm, resulting in compression of the airway. The patient underwent a successful tumour resection but postoperatively experienced left diaphragmatic paralysis, which was effectively managed through conservative measures. Histopathology was consistent with thymoma (type B2, Masaoka stage I). This case emphasises the critical role of collaborative efforts among oncology, surgery and anaesthesiology teams in achieving positive outcomes for rare paediatric mediastinal tumours. It underscores the importance of comprehensive preoperative anaesthetic assessments, careful planning for potential complications and vigilant postoperative monitoring. Healthcare professionals, particularly anaesthesiologists, can find valuable insights in this case report for navigating the complexities associated with managing giant mediastinal masses in the paediatric population., Competing Interests: Competing interests: None declared., (© BMJ Publishing Group Limited 2024. No commercial re-use. See rights and permissions. Published by BMJ.)

Introduction-Aim: Clinical reasoning in situations of uncertainty is a skill to be acquired from initial training. The aim of this study was to evaluate the clinical reasoning ability in a context of uncertainty of health science students using the Script Concordance Test (SCT)., Methods: This was a cross-sectional and descriptive study which included students in the third year of the National License in Anesthesia-Resuscitation, with their consent, and a panel of experts made up of ten members. The tool chosen was a TCS composed of 60 items which dealt with frequent and serious themes in general Anesthesia-Resuscitation., Results: We included 16 students. The average time to complete the test was 46.7 minutes±12.42 [95% CI; 37.81 -55.59] for experts and 54.38 minutes ±8.92 [95% CI; 49.62-59.13] for students. The average score obtained by the experts, reported out of 100, was 80.8±4.09 [95% CI; 77.90-83.75]. The average score of the students was 54.78±9.14 [95% CI; 49.91-59.65]., Conclusion: With the implementation of TCS as an assessment tool in health sciences, students demonstrated an increased capacity for reasoning in complex situations, as reflected in their average scores.

Objective . Methods of detecting apnea based on acoustic features can be prone to misdiagnosed and missed diagnoses due to the influence of noise. The aim of this paper is to improve the performance of apnea detection algorithms in the Post Anesthesia Care Unit (PACU) using a denoising method that processes tracheal sounds without the need for separate background noise. Approach . Tracheal sound data from laboratory subjects was collected using a microphone. Record a segment of clinical background noise and clean tracheal sound data to synthesize the noisy tracheal sound data according to a specified signal-to-noise ratio. Extract the frequency-domain features of the tracheal sounds using the Short Time Fourier Transform (STFT) and input the Cascaded Redundant Convolutional Encoder-Decoder network (CR-CED) network for training. Patients' tracheal sound data collected in the PACU were then fed into the CR-CED network as test data and inversely transformed by STFT to obtain denoised tracheal sounds. The apnea detection algorithm was used to detect the tracheal sound after denoising. Results . Apnea events were correctly detected 207 times and normal respiratory events 11,305 times using tracheal sounds denoised by the CR-CED network. The sensitivity and specificity of apnea detection were 88% and 98.6%, respectively. Significance . The apnea detection results of tracheal sounds after CR-CED network denoising in the PACU are accurate and reliable. Tracheal sound can be denoised using this approach without separate background noise. It effectively improves the applicability of the tracheal sound denoising method in the medical environment while ensuring its correctness., (© 2024 IOP Publishing Ltd. All rights, including for text and data mining, AI training, and similar technologies, are reserved.)

During the past 70 years, patient safety science has evolved through four organizational frameworks known as Safety-0, Safety -1, Safety-2, and Safety-3. Their evolution reflects the realization over time that blaming people, chasing errors, fixing one-offs, and regulation would not create the desired patient safety. In Safety-0, the oldest framework, harm events arise from clinician failure; event prevention relies on better staffing, education, and basic standards. In Safety-1, used by hospitals, harm events arise from individual and/or system failures. Safety is improved through analytics, workplace culture, high reliability principles, technology, and quality improvement. Safety-2 emphasizes clinicians' adaptability to prevent harm events in an everchanging environment, using resilience engineering principles. Safety-3, used by aviation, adds system design and control elements to Safety-1 and Safety-2, deploying human factors, design-thinking, and operational control or feedback to prevent and respond to harm events. Safety-3 represents a potential way for anesthesia and perioperative care to become safer., (Copyright © 2024 American Society of Anesthesiologists. All Rights Reserved.)

Intraoperative hypotension is a common perioperative complication in pediatric anesthesia. Oscillometric blood pressure measurement is therefore an essential part of standard perioperative monitoring in pediatric anesthesia. The optimum measurement site is the upper arm. Attention must be paid to the correct cuff size. Blood pressure should be measured before induction. In children undergoing major surgery or in critically ill children, invasive blood pressure measurement is still the gold standard. Continuous noninvasive measurement methods could be an alternative in the future.Threshold values to define hypotension remain unknown, even in awake children. There are also little data on hypotension thresholds in the perioperative setting. The most reliable measurement parameter for estimating hypotension is the mean arterial pressure. The threshold values for intraoperative hypotension are 40 mm Hg in newborns, 45 mm Hg in infants, 50 mm Hg in young children and 65 mm Hg in adolescents. Treatment should be initiated at a deviation of 10% and intensified at a deviation of 20%.Bolus administration of isotonic balanced crystalloid solutions, vasopressors and/or catecholamines are used as treatment options. Consistent and rapid intervention in the event of hypotension appears to be crucial. So far there is no evidence as to whether this leads to an improvement in outcome parameters., (© 2024. The Author(s), under exclusive licence to Springer Medizin Verlag GmbH, ein Teil von Springer Nature.)

Background: Severe QT interval prolongation requires monitoring QTc intervals during anaesthesia with recommended therapeutic interventions at a threshold of 500 ms. The need for 12-lead ECG and lack of standardisation limit such monitoring. We determined whether automated continuous intraoperative QTc monitoring with 5-lead ECG measures QTc intervals comparable to 12-lead ECG and whether the interpretation of QTc intervals depends on the correction formulae and the patient's sex. We compared intraoperative QTc times to QTc times from resting ECGs of a population from the same region, to substantiate the hypothesis that patients under general anaesthesia may need specific treatment thresholds., Methods: In this prospective observational study, intraoperative QT/QTc intervals were automatically recorded using 12 and 5-lead ECG in 100 patients (44% males). QTc values were analysed for sex and formula-specific aspects after correction for heart rate according to Bazett, Fridericia, Hodges, Framingham, Charbit and QTcRAS, and compared to a regional community-based cohort. The level of significance was set to α = 0.05., Results: QT interval duration was not significantly different between 12-lead and 5-lead ECG (difference - 0.09 ms ± 8.5 ms, p = 0.793). The QTc interval duration significantly differed between the correction formulae (p < 0.001) and between sexes (p < 0.001). Mean intraoperative QTc duration was higher than in resting ECGs from a large community-based population with the same regional background (438 vs. 417 ms). The incidence of prolonged values >500 ms significantly depended on the correction formula (p < 0.001) and was up to tenfold higher in women versus men., Conclusion: Intraoperative QTc interval measurement using a 5-lead ECG is valid. Correction formulae and gender influence the intraoperative QTc interval duration and the incidence of pathologically prolonged values according to current limits. The consideration and definition of sex-specific normal limits for QTc times under general anaesthesia, therefore, warrant further investigation., (© 2024 The Author(s). Acta Anaesthesiologica Scandinavica published by John Wiley & Sons Ltd on behalf of Acta Anaesthesiologica Scandinavica Foundation.)

These highlights focus on the research in lung transplantation (LTX) that was published in 2022 and includes the assessment and optimization of candidates for LTX, donor optimization, the use of organs from donation after circulatory death, and outcomes when using marginal or novel donors; recipient factors affecting LTX, including age, disease, the use of extracorporeal life support; and special situations, such as coronavirus disease2019, pediatric LTX, and retransplantation. The remainder of the article focuses on the perioperative management of LTX, including the perioperative risk factors for acute renal failure (acute kidney injury); the incidence and management of phrenic nerve injury, delirium, and pain; and the postoperative management of hyperammonemia, early postoperative infections, and the use of donor-derived cell-free DNA to detect rejection., Competing Interests: Declaration of competing interest The authors certify that they have no affiliations with or involvement in any organization or entity with any financial interest (eg, honoraria; educational grants; participation in speakers’ bureaus; membership, employment, consultancies, stock ownership, or other equity interest; and expert testimony or patent-licensing arrangements), or nonfinancial interest (eg, personal or professional relationships, affiliations, knowledge, or beliefs) in the subject matter or materials discussed in this manuscript., (Copyright © 2024 Elsevier Inc. All rights reserved.)

The global burden of infertility is significant and the evidence suggests it is increasing in prevalence worldwide. Assisted reproductive technologies (ARTs) are fertility related treatments used to achieve pregnancy which involve the manipulation of both oocytes and sperm. The specialty is rapidly growing and anaesthesia may be required for several stages in the ART cycle. Anaesthesiologists should appreciate the processes involved and how anaesthesia care can influence safe and effective treatment outcomes. In this review article we explain the key steps of the ART cycle and the role of anaesthesiologists in this process. We also highlight key patient considerations, the implications of remote site anaesthesia and the safety concerns with provision of sedation by non-anaesthesiologists. Finally we outline a typical anaesthetic technique used in our institution for transvaginal oocyte retrieval., (Copyright © 2024 Elsevier Ltd. All rights reserved.)

Introduction: This quality improvement initiative is a continued pursuit to optimize outcomes by iteratively improving our opioid sparing anesthesia protocol for tonsillectomy with or without adenoidectomy at our pediatric ambulatory surgical center through data driven Plan-Do-Study-Act cycles., Methods: From 1/2015 through 12/2023, our standardized tonsillectomy protocol underwent nine procedure-specific perioperative Plan-Do-Study-Act cycles, three procedure-specific postoperative prescription Plan-Do-Study-Act cycles, and four general ambulatory surgical center enhanced recovery Plan-Do-Study-Act cycles. We analyzed data from the medical record using statistical process control charts. The primary outcome measure was the percent of patients requiring intravenous opioid in the post anesthesia care unit. Secondary outcomes included maximum post anesthesia care unit pain score, the percent of patients requiring treatment for nausea and/or vomiting in the post anesthesia care unit, and the number of postoperative opioid prescription dosages. Balancing measures were average post anesthesia care unit length of stay, percent of patients with prolonged Post Anesthesia Care Unit length of stay (>120 min), and 30-day reoperation rate., Results: A total of 5654 tonsillectomy with or without adenoidectomy cases were performed at our ambulatory surgical center from 2015 to 2023. The incidence of intravenous opioid administered in the post anesthesia care unit initially rose with opioid free anesthesia launch, but subsequently decreased below the target of 10%. Maximum post anesthesia care unit pain scores rose from mean 3.6 to 4.5, but subsequently returned to the baseline of 3.5, while the incidence of postoperative nausea and/or vomiting improved. The average post anesthesia care unit length of stay increased by 10 min with opioid free anesthesia; however, prolonged post anesthesia care unit stay and 30-day reoperation rates were unchanged., Conclusions: The continued refinement of our opioid sparing anesthesia protocol has led to reduced perioperative and home opioid use, stable maximum post anesthesia care unit pain scores, and improved postoperative nausea and vomiting rates, with only a slight increase in mean post anesthesia care unit length of stay., (© 2024 John Wiley & Sons Ltd.)

Objective: To describe clinical characteristics and outcomes, including transfusion requirements, in pediatric patients with congenital heart disease undergoing aspiration thrombectomy., Design: Retrospective chart review., Setting: Quaternary academic children's hospital., Participants: Patients aged <18 years with congenital heart disease undergoing aspiration thrombectomy between November 2017 and February 2022., Measurements and Main Results: Thirteen patients underwent mechanical thrombectomy with the Penumbra Indigo System. Their median age was 3.8 years, and median weight was 15.2 kg. Seven patients had palliated single ventricle circulation, and 6 had biventricular circulation. Nine patients had intensive care unit (ICU) admission before the procedure, and 12 required ICU admission after the procedure. Indications for thrombectomy included systemic venous thrombus in 7 patients, pulmonary arterial thrombus in 3 patients, systemic arterial thrombus in 2 patients, and systemic-to-pulmonary shunt occlusion in 1 patient. The median estimated blood loss was 7.7 mL/kg (interquartile range [IQR], 1.4-15.8 mL/kg; range, 0.5-51.5 mL/kg). Seven patients required intraoperative transfusion of packed red blood cells (n = 4), fresh frozen plasma (n = 2), platelets (n = 3), and/or cryoprecipitate (n = 1). In the patients requiring transfusion, the median transfusion volume was 22 mL/kg (IQR, 14.1-59.7 mL/kg, 9.3-132.8 mL/kg). Thrombectomy was successful in 8 of 13 patients, although 3 of these 8 patients experienced recurrent thrombosis., Conclusions: Mechanical aspiration thrombectomy is being increasingly used to treat critically ill pediatric patients and presents unique anesthetic considerations, particularly related to the need for volume and blood product resuscitation., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2024 Elsevier Inc. All rights reserved.)

Background: The 7th National Audit Project of the Royal College of Anaesthetists studied peri-operative cardiac arrest because of existing knowledge gaps in this important topic. This applies in particular to cardiology patients receiving anaesthetic care, because numbers, types and complexity of minimally invasive interventional procedures requiring planned and unplanned anaesthesia in the cardiac intervention suite is increasing., Methods: We analysed collected data to determine the epidemiology, clinical features, management and outcomes of peri-operative cardiac arrest in adult patients receiving anaesthetic care for cardiology procedures., Results: There were 54 reports of peri-operative cardiac arrest in adult patients receiving anaesthetic care for cardiology procedures, accounting for 54/881 (6.1%) of all reports to NAP7. The estimated incidence (95%CI) of cardiac arrests in this group was 1/450 or 0.22 (0.17-0.29)%. These patients were older than other adult patients in the NAP7 population, with a notably high proportion of patients of Asian ethnicity when compared with the remaining NAP7 cohort (9/54, 17% vs. 35/709, 5%). Rates of extracorporeal membrane oxygenation cardiopulmonary resuscitation were low (3/53, 6%). A common theme was that of logistical issues and teamworking, with reporters commenting on the difficulties of remote and/or unfamiliar locations and communication issues between specialties, on occasion resulting in poor teamworking and a lack of focus. The NAP7 panel review identified several other common themes which included: cardiogenic shock; late involvement of anaesthesia in the case; and transcatheter aortic valve implantation., Conclusion: Cardiology procedures requiring anaesthesia care account for < 1% of anaesthesia activity but generate 6% of all peri-operative cardiac arrests. The incidence of cardiac arrest was disproportionately high in cardiological procedures requiring anaesthetic care. The nature of the cardiac arrest reports to NAP7 indicate that logistical and human factors in multidisciplinary teams in the cardiac intervention suite merit addressing to improve care., (© 2024 Association of Anaesthetists.)

Introduction: This study aimed to assess the impact of positive-end-expiratory pressure (PEEP) on the non-hypoxic apnea time in infants during anesthesia induction with an inspired oxygen fraction of 0.8., Methods: This age stratified randomized controlled trial included patients under 1 year of age. Preoxygenation was performed using an inspired oxygen fraction of 0.8 for 2 min. Inspired oxygen fraction of 0.8 was administered via a face mask with volume-controlled ventilation at a tidal volume of 6 mL.kg -1 , with or without 7 cmH 2 O of PEEP. Tracheal intubation was performed after 3 min of ventilation; however, it was disconnected from the breathing circuit. Ventilation was resumed once the pulse oximetry readings reached 95%. The primary outcome was the non-hypoxic apnea time, defined as the time from the cessation of ventilation to achieving a pulse oximeter reading of 95%. The secondary outcome measures included the degree of atelectasis assessed by ultrasonography and the presence of gastric air insufflation., Results: Eighty-four patients were included in the final analysis. In the positive end-expiratory pressure group, the atelectasis score decreased (17.0 vs. 31.5, p < .001; mean difference and 95% CI of 11.6, 7.5-15.6), while the non-hypoxic apnea time increased (80.1 s vs. 70.6 s, p = .005; mean difference and 95% CI of -9.4, -16.0 to -2.9), compared to the zero end-expiratory pressure group, among infants who are 6 months old or younger, not in those aged older than 6 months., Discussion: The application of positive end-expiratory pressure reduced the incidence of atelectasis and extended the non-hypoxic apnea time in infants who are 6 months old or younger. However, it did not affect the incidence of atelectasis nor the non-hypoxic apnea time in patients aged older than 6 months., (© 2024 The Author(s). Pediatric Anesthesia published by John Wiley & Sons Ltd.)

Patients with congenital heart disease are living longer due to improved medical and surgical care. Congenital heart disease encompasses a wide spectrum of defects with varying pathophysiology and unique anesthetic challenges. These patients often present for noncardiac surgery before or after surgical repair and are at increased risk for perioperative morbidity and mortality. Although there is no singular safe anesthetic technique, identifying potential error traps and tailoring perioperative management may help reduce morbidity and mortality. In this article, we discuss five error traps based on the collective experience of the authors. These error traps can occur when providing perioperative care to patients with congenital heart disease for noncardiac surgery and we present potential solutions to help avoid adverse outcomes., (© 2024 John Wiley & Sons Ltd.)

Background: Despite advancements in surgical and anesthesia techniques, acute and persistent postoperative pain are still a common challenge. Postoperative pain has direct effects on individual patient care and outcome, as well as putting strain on limited health care resources. Several prediction methods for postoperative pain have been described. One such method is the assessment of pain during peripheral venous cannulation (VCP). It is not known if different approaches to anesthesia and analgesia, depending on the evaluation of risk for postoperative pain, can improve outcome. The aim of this study is to evaluate if individualized anesthesia and analgesia can affect postoperative pain and recovery after surgery, in patients stratified by VCP., Methods: Adult patients scheduled for laparoscopic surgery undergo pain-sensitivity stratification using VCP on the day of surgery. Patients scoring VCP ≥2.0 on the visual analogue scale (pain-sensitive) are randomized to multimodal anaesthesia and analgesia with opioids or standard of care. Patients scoring VCP ≤1.9 (pain-tolerant) are randomized to opioid-free anaesthesia or standard of care. The primary outcome is acute postoperative pain measured with numeric rating scale in the postoperative care unit. Secondary outcomes include analysis of pain after 24 h, persistent postoperative pain and quality of recovery., Discussion: Individualized perioperative pain management has the potential to improve patient care. This study will examine the impact of different anesthesia and analgesia regimes, in patients with differing pain sensitivity, on postoperative pain., Trial Registration: Prospectively posted at ClinicalTrials.gov, identifier NCT04751812., (© 2024 The Author(s). Acta Anaesthesiologica Scandinavica published by John Wiley & Sons Ltd on behalf of Acta Anaesthesiologica Scandinavica Foundation.)

Pulmonary artery banding (PAB) is a procedure mainly performed during the neonatal period as an initial stage to definitive palliative reconstruction, a scenario in which the criteria for banding adjustment are well defined. However, the indication for BAP in the adult is extraordinarily rare, even more in patients with single ventricle and unrepaired transposition of the great arteries (TGA), and there are no established criteria for banding adjustment. Due to the small number of these procedures, there is limited experience in their anesthetic management and complications. We describe a case of a 29-year-old patient diagnosed with a cyanotic congenital heart disease of double-inlet left ventricle with TGA and unrepaired mitral stenosis, who underwent to a hybrid procedure of PAB and enlargement of the communication between the two atria., (Publicado por Elsevier España, S.L.U.)

Pregnancy in patients with Fontan physiology presents unique challenges due to altered cardiovascular dynamics inherent to both conditions. The Fontan procedure reroutes venous blood directly to the pulmonary arteries, bypassing the heart, and necessitating precise regulation of pulmonary venous resistance and systemic venous pressure to maintain effective cardiac output. The significant cardiovascular adaptations required during pregnancy to meet the metabolic demands of the mother and fetus can overburden the limited preload capacity and venous compliance in Fontan patients, predisposing them to a spectrum of potential complications, including arrhythmias, heart failure, thromboembolism, and obstetric and fetal risks. This review delineates the essential physiological adaptations during pregnancy and the challenges faced by Fontan patients, advocating for a comprehensive care approach involving multidisciplinary collaboration, vigilant monitoring, tailored anesthetic management, and postpartum care. Understanding the complex dynamics between Fontan physiology and pregnancy is crucial for anesthesiologists to develop and execute individualized management strategies to minimize risks and optimize outcomes for this high-risk population., Competing Interests: Declaration of competing interest None., (Copyright © 2024 Elsevier Inc. All rights reserved.)

Liver cancer, one of the most common malignant tumors, has seriously threatened people's physical and mental health. The paper was conducted to investigate the functions of two different anesthesia methods on Tumor necrosis factor-α (TNF-α), C-reactive protein (CRP) and T lymphocyte subsets in patients undergoing liver cancer resection, and to explore the liver function impact of patients undergoing liver cancer surgery. 80 liver cancer patients were split into propofol intravenous anesthesia group and sevoflurane inhalation anesthesia group. The patient's operation-related indicators and changes in TNF-α, CRP and T lymphocyte subsets before anesthesia, after anesthesia, 1 day after anesthesia, and 3 days after anesthesia were calculated. The levels of TNF-α and CRP in the two groups after operation were clearly higher than those before anesthesia, but there was no obvious difference between the two groups. After operation, the TNF-α of the propofol intravenous anesthesia group was lower than the sevoflurane inhalation anesthesia group. The CD3+, CD4+ and CD4+/CD8+ levels in both groups recovered to the pre-anaesthesia level 3 days after the operation. The levels of ALT, AST, ALB and TBIL returned to normal at d4 in both propofol intravenous anesthesia and sevoflurane inhalation anesthesia groups. Compared with evoflurane inhalation anesthesia for patients with liver cancer, intravenous anesthesia with propofol can reduce the body's inflammatory response to a certain extent, has weak inhibitory effect on T lymphocyte immune function, and a smaller effect on liver function.

Background: Anesthesiologists transition patient care to combat clinician fatigue and accommodate shift limitations. Studies exploring the association of increased handovers with patient outcomes have conflicting findings. Here, we investigate the association of anesthesia handovers with perioperative outcomes in patients undergoing cytoreductive surgery and hyperthermic intraperitoneal chemotherapy., Methods: Patients undergoing cytoreductive surgery and hyperthermic intraperitoneal chemotherapy at a single institution from 2017 to 2022 were stratified by the number of anesthesia attending and nonattending (nurse anesthetist/resident) handovers (0-1 or ≥2). Primary outcomes were intensive care unit and hospital length of stay, in addition to 30-day serious morbidity. Logistic and negative binomial regression models were adjusted for covariates related to patient and case complexity., Results: A total of 182 patients were included. Median operative time was 720 minutes (interquartile range, 540-900 minutes). Most cases had fewer than 2 attending handovers (n = 147, 81% vs ≥2 handovers n = 35, 19%) and 2 nonattending handovers (n = 120, 71% vs ≥2 handovers n = 53, 29%). In adjusted models, there were no differences in 30-day serious morbidity and intensive care unit or hospital length of stay between the attending handover groups (0-1 vs ≥2). Patients with ≥2 non-attending handovers had similar odds of 30-day serious morbidity compared with the 0-1 group (odds ratio, 1.613, 95% confidence interval, 0.733-3.550, P = .235), but a longer total hospital (incidence rate ratio, 1.301, 95% confidence interval, 1.071-1.579, P = .008) and intensive care unit length of stay (incidence rate ratio 1.548, 95% confidence interval, 1.038-2.049, P = .030)., Conclusions: Multiple anesthesia handovers were not associated with an increased risk of serious morbidity for patients undergoing cytoreductive surgery and hyperthermic intraperitoneal chemotherapy. However, increased handovers (≥2) between nonattending providers was associated with longer hospital and intensive care unit length of stays., Competing Interests: Conflict of Interest/Disclosure The authors have no related conflicts of interest., (Copyright © 2024 Elsevier Inc. All rights reserved.)

Objectives: Although the guidelines clearly recommend the fasting time of children before anesthesia, it is usually difficult to control. For pediatric patients, prolonged fasting time before surgery will lead to dehydration and hypoglycemia. Adenotonsillectomy is one of the most common operations in pediatric patients, but its complications are not rare. The purpose of this study is to analyze the relationship between preoperative fasting time and postoperative complications in children undergoing adenotonsillectomy., Methods: The medical and surgical records of 480 pediatric patients who underwent adenotonsillectomy were analyzed retrospectively. They were divided into three groups, including adenoidectomy group, tonsillectomy group, and adenotonsillectomy group. Logistic regression analysis was used to analyze the effect of preoperative fasting time on postoperative complications and hospital stay in pediatric patients of the three groups., Results: The postoperative bleeding rate in the adenoidectomy group (5.16%) was lower than tonsillectomy group and adenoidectomy group (P < .001). Logistic regression analysis showed that the fasting time was positively correlated with the vomiting and pain in adenoidectomy group, tonsillectomy group, and adenotonsillectomy group. And, the postoperative hospital stay was also positively correlated with fasting time in three groups., Conclusion: The prolonged fasting time before otolaryngology surgery in children is related to the occurrence of postoperative complications like vomiting and pain, and also to the increase of postoperative hospital stay., Competing Interests: Declaration of conflicting interestsThe author(s) declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.

Objective The monitoring of anesthetic depth based on electroencephalogram derivation is not currently adjusted for age. Here we analyze the influence of age factors on electroencephalogram characteristics. Methods Frontal electroencephalogram recordings were obtained from 80 adults during routine clinical anesthesia. The characteristics of electroencephalogram with age and anesthesia were observed during four kinds of anesthesia. Results The slow wave power, δ power, Bispectral Index (BIS) and approximate entropy can be used to distinguish different states of anesthesia (P < 0.05). In the deep and very deep anesthesia states, δ power decreased with age (P < 0.0001). In the very deep anesthesia state, θ power decreased with age (P < 0.05). In the deep and very deep anesthesia states, α power decreased with age (P = 0.0002). In the light and deep anesthesia states, β power decreased with age (P = 0.003). In the deep anesthesia state, γ power decreased with age (P = 0.002). In the very deep anesthesia state, permutation entropy increased significantly with age (P = 0.0001). In the very deep anesthesia state, BIS value increased with age (P = 0.006). The slow wave power, approximate entropy, and sample entropy did not show age-dependent changes. Conclusions The influence of age should be considered when using BIS and δ power to monitor the depth of anesthesia, while the influence of age should not be considered when using slow wave power and approximate entropy to monitor the depth of anesthesia.

Delayed graft function (DGF) increases morbidity and mortality in kidney transplant recipients. Operative parameters, including hemodynamic manipulation through vasopressors and fluids, can impact perfusion to the newly transplanted kidney and influence DGF incidence. We analyzed intraoperative time-series data in 5-minute intervals from kidney transplant recipient operations (N = 545) in conjunction with pretransplant characteristics and postsurgical outcomes, including DGF incidence, 60-day creatinine, and graft survival. Of the operations, 127 DGF events were captured in our cohort from a single academic transplant center (57/278 donations after brainstem death [DBDs], 65/150 donations after circulatory/cardiac death [DCDs], 5/117 live donations). In multiple regression, postanastomosis hypotension defined as mean arterial pressure (MAP) <75 mmHg was a risk factor for DGF independent of conventional predictors of DGF in DCD and DBD kidneys. DCD recipients with DGF had lower average postanastomosis MAP (DGF: 80.1 ± 8.1 mmHg vs no DGF: 76.4 ± 6.7 mmHg, P = .004). Interaction analysis demonstrated above-average doses of vasopressors and crystalloids were associated with improved outcomes when used at MAPs ≤75 mmHg, but they were associated with increased DGF at MAPs >75 mmHg, suggesting that the incidence of DGF can be highly influenced by intraoperative hemodynamic controls. This analysis of surgical time courses has identified potential new strategies for goal-directed anesthesia in renal transplantation., Competing Interests: Declaration of competing interest The authors of this manuscript have no conflicts of interest to disclose as described by the American Journal of Transplantation., (Copyright © 2024 The Author(s). Published by Elsevier Inc. All rights reserved.)

Purpose: To explore the patterns of anesthesia use and their determinants during vitreoretinal (VR) surgeries in academic and community hospitals across the US, using data from the Multicenter Perioperative Outcomes Group (MPOG)., Design: A retrospective, multicenter, cohort study., Methods: We queried the MPOG database of 107,066 patients undergoing VR surgeries. Patients (≥18 years) undergoing VR surgery with monitored anesthesia care (MAC) or general anesthesia (GA) from January 1, 2015 to December 31, 2021 were included. Patient-level, case-based, and institutional-level covariates were collected. We performed multivariable mixed-effects models to determine predictors of anesthesia type use. The primary outcome was the type of anesthesia (MAC or GA) used during VR surgeries. As a secondary outcome, MAC cases were further classified based on the additional use of sedation into MAC with or without sedation., Results: We found that 67.45% of VR surgery cases received MAC, and 73.63% of institutions administered MAC to more than half of cases. Random effect modeling revealed that 47.76% of the variation in MAC use was attributed to institutions. A trend toward increased use of MAC with increasing age was observed. Patients diagnosed with chronic pulmonary disease, liver disease, or a history of drug abuse were less likely to receive MAC. Conversely, we found that patients with reported alcohol abuse disorder, diabetes with complications, and those with American Society of Anesthesiologists (ASA) physical status of 4 (vs. 1, 2, or 3) were more likely to use MAC. Compared to non-complex VR surgeries, there was a notably decreased likelihood of MAC use in complex PPV (P = .004), PPV + scleral buckle (SB) for retinal detachment (P < .0001), and primary SB surgery (P < .0001)., Conclusions: Approximately 2/3 of VR anesthesia is under MAC, but GA is still preferred for SBs, complex vitrectomy, and younger patients. We show that large interinstitutional variation for using MAC in practice exists., (Copyright © 2024 Elsevier Inc. All rights reserved.)

Introduction: The rise of opioid-free anaesthesia (OFA) aims to reduce postoperative pain while reducing opioid-related side effects during surgery. However, the various adjuvant agents used in OFA complicate the evaluation of their effectiveness and risks. Recent reviews question the clinical benefits of OFA, highlighting the need for thorough evaluation. This protocol describes a network meta-analysis to compare the effectiveness of OFA with opioid-based anaesthesia and will identify key components for optimal postoperative outcomes., Methods and Analysis: We will perform a systematic search of literature published in English without time restriction in Embase, The Cochrane Library, MEDLINE (via PubMed) and CINAHL, along with Google Scholar for grey literature. The final search will be performed on 1 October 2024. We will include randomised controlled trials with adult patients undergoing surgery with general anaesthesia, excluding preclinical, observational, regional anaesthesia-only and prolonged anaesthesia outside the operating room studies. The primary outcome is postsurgical pain scores, with secondary outcomes including quality of recovery, opioid consumption, adverse effects and long-term events. We will assess bias using the Cochrane risk of bias 2 tool and conduct Bayesian network meta-analyses for pooled estimates. We will report effect estimates as ORs and standardised mean differences with 95% credible intervals and assess certainty using GRADE methodology., Ethics and Dissemination: Ethics approval is not required for this systematic review. Results will be published in a peer-reviewed journal and presented at national and international anaesthesia and pain management conferences., Prospero Registration Number: CRD42024505853., Competing Interests: Competing interests: MWH is the Executive Section Editor in Pharmacology with Anesthesia & Analgesia, Editor with Journal of Clinical Medicine, and Editor Frontiers in Physiology. MWH received honorarium for consultancy from IDD Pharma, Medical Developments & PAION. The other authors declare that they have no competing interests., (© Author(s) (or their employer(s)) 2024. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.)

Introduction: Orthognathic surgery is widely accepted for correcting dentofacial deformities. Due to the rich blood supply in the head and neck region, considerable bleeding can occur from the incised soft tissues and bone during orthognathic surgery. Hypotensive anesthesia is a method used in surgical practice by which blood pressure is decreased predictably and deliberately to reduce blood loss and improve surgical field. However, there is still uncertainty regarding its effectiveness and safety in orthognathic surgery., Methods: We searched in Epistemonikos, the largest database of systematic reviews in health, which is maintained by screening multiple information sources, including MEDLINE, EMBASE, Cochrane, among others. We extracted data from the systematic reviews, reanalyzed data of primary studies, conducted a meta-analysis, and generated a summary of findings table using the GRADE approach., Results and Conclusions: We identified three systematic reviews, including 11 studies overall, which are randomized trials. We concluded that hypotensive anesthesia may reduce intraoperative blood loss and may improve the quality of surgical field, however, the certainty of the evidence has been assessed as low. On the other hand, orthognathic surgery with HA may make little or no difference in surgical time (low certainty evidence). Finally, no studies were found that reported adverse effects or mortality., Competing Interests: The authors do not have a relevant conflict of interest to declare., (This work is licensed under a Creative Commons Attribution 4.0 International License.)

Efficient operating room management is essential and requires precise surgery scheduling. We hypothesized that an estimation formula for the preparation time for anesthesia induction and surgery could be developed by incorporating anesthesia and surgical factors, as well as the 'clinical department,' into the formula. This retrospective observational study analyzed 12,528 scheduled surgical cases. A regression analysis that included the clinical department, six anesthesia factors, and five surgical factors was conducted. This analysis aimed to develop both an analytical framework and an equation for estimating the time required for both anesthesia induction and surgical preparation. Our estimation formula wielded high accuracy (R 2  = 0.801). Particularly, there was only a difference of less than 3 min for surgeries under general anesthesia. In addition, modeling preparation time using "medical interventions performed in the operating room" as a factor instead of patient characteristics was found to be beneficial. It was possible to develop a highly accurate formula for estimating preparation time of anesthesia induction and surgery by analyzing the anesthesia factors and the surgical factors and incorporating the clinical department as an estimation factor. However, this study represents the development phase of the estimation formula. A multicenter study is essential to validate its generalizability and robustness across different settings before broader application., (© 2024. The Author(s).)

BACKGROUND To evaluate neuromuscular monitoring during anesthesia with mivacurium, this study assessed the correlation between measurements of TOF-Cuff® placed on the lower leg and stimulating the tibial nerve and TOF-Scan® values from the adductor pollicis muscle. Additionally, systolic (SBP) and diastolic (DBO) blood pressure measured in both locations were compared. MATERIAL AND METHODS Twenty-six patients participated in this observational clinical trial. The TOF-Cuff® was placed on the lower leg and the TOF-Scan® was placed on the thumb. Train-of-four (TOF) values were recorded simultaneously by both devices at 30-second intervals before intubation. Measurements continued every 5 minutes until extubation. Bland-Altman analyses compared TOF values obtained from the 2 devices. RESULTS Time to onset and relaxation time did not differ significantly; the number of patients presenting a lack of blockade despite TOF=0 was also concordant. The time from the last dose of mivacurium to TOF ratio >90 was shorter on the leg than on hand (median 20 [5-28, 0-65] min vs 30 [20-35, 0-60] min, p=0.025). The median (range, interquartile range) difference between measurements was: 11.6 (-41 to 45, 2-19) for SBP and -8 (-28 to 26, -15 to -4) for DBP at baseline (p=0.0495); 5 (-53 to 55, -2 to 9) for SBP and -11 (-45 to 29, -19 to -5) (p=0.0017) for DBP during the blockade. CONCLUSIONS Time-to-onset and SBP are comparable between these 2 methods, in contrast to time-to-recovery and diastolic blood pressure, and this should be considered in case of the inability to apply the TOF-Cuff on the leg.

Obesity is a global epidemic affecting a broad range of individuals, regardless of economic and social strata. In 2022, the World Health Organization (WHO) reported that 16 % of adults and 160 million children were living with this condition. The economic impact is significant, with a recent Milken report estimating the annual cost of obesity in the US at 1.4 trillion dollars, accounting for almost 7 % of the United States gross domestic product. It is widely recognized that the most severe forms of pediatric obesity (120 % of the 95th percentile for age and sex) represent an epidemic within an epidemic, given their potential for diminished long-term health and shortened lifespan. The treatment paradigm for obesity covers a range of approaches, with the American Academy of Pediatrics (AAP) recommending behavior and lifestyle modification as initial components of care. Since 2004, bariatric surgery has increasingly been utilized as an additional option for treating adolescent obesity, as long-term findings have shown sustained reductions in BMI and improvements in comorbid conditions. For anesthesiologists, these patients present specific challenges that require review., (Copyright © 2024. Published by Elsevier Inc.)

Importance: Despite guidelines recommending avoidance of benzodiazepine administration to older patients, many of them now receive benzodiazepines as a part of anesthesia care. The effectiveness of clinician- and patient-facing interventions to discourage such use remains insufficiently characterized., Objective: To evaluate the effect of clinician peer comparison, patient informational mail, or a combination of these interventions compared with usual care on the rate of perioperative benzodiazepine administration to older patients., Design, Setting, and Participants: This 2 × 2 factorial, stepped-wedge, cluster randomized clinical trial of a corporate quality improvement initiative was conducted between August 8, 2022, and May 28, 2023, across 415 hospitals, surgery centers, and physician offices in 8 US states served by anesthesia clinicians from a national anesthesia practice. Participants were adults aged 65 years or older who underwent an elective surgical or endoscopic procedure with general anesthesia. Data analyses followed the intention-to-treat principle., Intervention: Patients were randomly assigned to 1 of 4 groups-clinician peer comparison (wherein clinicians received feedback regarding their performance compared with other clinicians in the practice), patient informational mail (wherein patients received an informational letter encouraging them to have a discussion regarding medication selection with their clinician on the day of surgery), both interventions, or usual care (no intervention)., Main Outcomes and Measures: Rate of benzodiazepine administration during anesthesia care and patient satisfaction with anesthesia care (measured by the Anesthesia Patient Satisfaction Questionnaire, version 2)., Results: Among the 509 269 enrolled participants (255 871 females [50.2%]; mean [SD] age, 74 [7] years), 81 363 (16.0%) were assigned to clinician peer comparison, 98 520 (19.3%) to patient informational mail, 169 712 (33.3%) to both interventions, and 159 674 (31.4%) to usual care. Among patients who received benzodiazepine during anesthesia care, 24.5% were in the usual care group compared with 19.7% in the clinician peer comparison group, 20.0% in the patient informational mail group, and 19.7% in the combination group. After adjustment for time, none of the study interventions were associated with lower odds of benzodiazepine administration compared with usual care (odds ratio [OR], 1.02 [95% CI, 0.98-1.07]; P = .35 for clinician peer comparison; OR, 1.01 [95% CI, 0.96-1.05]; P = .81 for patient informational mail; and OR, 1.11 [95% CI, 1.05-1.16]; P < .001 for combined interventions). Satisfaction scores were high in all groups and did not vary by treatment assignment., Conclusions and Relevance: This randomized clinical trial found that clinician peer comparison, patient informational mail, or a combination of both interventions did not reduce benzodiazepine administration to older patients compared with usual care; patient satisfaction remained high throughout the study. Overall, the findings suggest a need to explore other patient-targeted interventions to improve anesthesia care., Trial Registration: Clinicaltrials.gov Identifier: NCT05436392.

Pectus excavatum (PE) is a common anterior chest wall deformity that affects the heart and lungs depending on the severity of compression. The Nuss procedure, a minimally invasive repair of pectus excavatum, has evolved over the years with thoracoscopic assistance and minimal incision. Despite improved surgical techniques, pain and nausea are often the most common factors determining hospital length of stay. This review will explore the preoperative, intraoperative, and postoperative anesthetic considerations necessary for improving patient outcomes, reducing surgical stress, and shortening hospital stays for patients undergoing the Nuss procedure., (Copyright © 2024 Elsevier Inc. All rights reserved.)

Fetal therapy is a well-established but rapidly evolving field discipline. Fetal interventions require a multidisciplinary team approach that emphasizes collaboration and communication. The success of a fetal therapy program relies on the availability of a comprehensive obstetric and neonatal care team, support services, and advanced imaging. Technological advancements in prenatal fetal imaging and genetic diagnosis have improved our understanding of various fetal anomalies. Surgical techniques and anesthetic management have also advanced, leading to better outcomes. Fetal anesthesia presents unique challenges as it involves managing both the mother and the fetus. Anesthetic management focuses on ensuring maternal safety and comfort, maintaining adequate uteroplacental perfusion, optimizing surgical conditions, and minimizing risks for both the mother and the fetus. This article reviews current anesthesia practices for fetal surgery, highlighting recent advances and future directions., (Copyright © 2024 Elsevier Inc. All rights reserved.)

Introduction: While living donor liver transplantation (LDLT) serves as the predominant method of adult liver transplant (LT) in the Republic of Korea (ROK), it represents a minority of LT in the United States (US). A survey was conducted to gain insight into these nations' anesthetic management., Methods: An electronic questionnaire was distributed to directors of LT anesthesiology overseeing LDLT programs in both countries between May 2021 and October 2021., Results: The response rate was 93.0% (100% [37/37] in the US and 80% [16/20] in the ROK). Both countries mainly adhered to deceased donor LT recipient management practices, including the frequency of routine pulmonary artery catheter use, transesophageal echocardiography, and point-of-care coagulation monitoring. Differences were observed in early extubation of recipients (US vs. ROK: 39.7% vs. 14.7% of all cases), participation in donor selection meetings (88.9% [32/36] vs. 6.3% [1/16], p < 0.0001), application of the Enhanced Recovery After Surgery donor protocol (69.4% [25/36] vs. 12.5% [2/16], p < 0.0001), and cell saver usage for donors (94.4% [34/36] vs. 18.8% [3/16], p < 0.0001). More ROK programs implemented simultaneous donor/recipient anesthesia supervision by a single anesthesiologist., Conclusions: Several important differences were identified between the US and the ROK in adult LDLT anesthetic management., (© 2024 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd.)

Meta-analyses are a central part of systematic reviews. The term meta-analysis describes the statistical methods to summarize the results of the available scientific studies providing the highest possible evidence. In medicine, meta-analyses aim to guide clinical decisions. This article provides an overview of the necessary work steps.The classical meta-analysis summarizes the results of randomized controlled trials that compare an intervention against a control intervention. This is illustrated by means of an example from a Cochrane Review on videolaryngoscopy in comparison to direct laryngoscopy. Crucial methodological aspects such as the weighting of individual studies when pooling their results as well as the evaluation of study heterogeneity and potential publication bias are explained.The second part of the article focusses on two extensions of meta-analyses: the individual patient data meta-analysis and the network meta-analysis. The individual patient data meta-analysis makes use of the information that is available from the patient-level data of the included studies. As an example, the work accomplished by an international collaboration on the efficacy of acupuncture in chronic pain is presented. A network meta-analysis enables the comparison of more than two interventions by making use not only of the available direct but also of the respective indirect evidence. This is illustrated by means of a Cochrane Review on drugs for the prophylaxis of postoperative nausea and vomiting., (© 2024. The Author(s), under exclusive licence to Springer Medizin Verlag GmbH, ein Teil von Springer Nature.)

Competing Interests: The authors declare no conflicts of interest.

Competing Interests: Conflicts of Interest, Funding: Please see DISCLOSURES at the end of this article.

Somatosensory evoked potentials (SEPs) are used to assess the functional status of somatosensory pathways during surgical procedures and can help protect patients' neurological integrity intraoperatively. This is a position statement on intraoperative SEP monitoring from the American Society of Neurophysiological Monitoring (ASNM) and updates prior ASNM position statements on SEPs from the years 2005 and 2010. This position statement is endorsed by ASNM and serves as an educational service to the neurophysiological community on the recommended use of SEPs as a neurophysiological monitoring tool. It presents the rationale for SEP utilization and its clinical applications. It also covers the relevant anatomy, technical methodology for setup and signal acquisition, signal interpretation, anesthesia and physiological considerations, and documentation and credentialing requirements to optimize SEP monitoring to aid in protecting the nervous system during surgery., (© 2024. The Author(s).)

To prevent motion artifacts in small animal positron emission tomography (PET), animals are routinely scanned under anesthesia or physical restraint. Both may potentially alter metabolism and neurochemistry. This study investigates the feasibility of fully awake acquisition and subsequent absolute quantification of dynamic brain PET data via pharmacokinetic modelling in moving rats using the glutamate 5 receptor radioligand [ 11 C]ABP688 and point source based motion correction. Five male rats underwent three dynamic [ 11 C]ABP688 PET scans: two test-retest awake PET scans and one scan under anesthesia for comparison. Specific radioligand binding was determined via the simplified reference tissue model (reference: cerebellum) and outcome parameters BP ND and R 1 were evaluated in terms of stability and reproducibility. Test-retest measurements in awake animals gave reliable results with high correlations of BP ND (y = 1.08 × -0.2, r = 0.99, p < 0.01) and an acceptable variability (mean over all investigated regions 15.7 ± 2.4%). Regional [ 11 C]ABP688 BP ND s under awake and anesthetized conditions were comparable although in awake scans, absolute radioactive peak uptakes were lower and relative blood flow in terms of R 1 was higher. Awake small animal PET with absolute quantification of neuroreceptor availability is technically feasible and reproducible thereby providing a suitable alternative whenever effects of anesthesia are undesirable, e.g. in sleep research., Competing Interests: Declaration of conflicting interestsThe author(s) declared the following potential conflicts of interest with respect to the research, authorship, and/or publication of this article:Alexander Drzezga: Research support: Siemens Healthineers, Life Molecular Imaging, GE Healthcare, AVID Radiopharmaceuticals, Sofie, Eisai, Novartis/AAA, Ariceum TherapeuticsSpeaker Honorary/Advisory Boards: Siemens Healthineers, Sanofi, GE Healthcare, Biogen, Novo Nordisk, Invicro, Novartis/AAA, Bayer VitalStock: Siemens Healthineers, Lantheus Holding, Structured therapeutics, ImmunoGenPatents: Patent for 18 F-JK-PSMA- 7 (Patent No.: EP3765097A1; Date of patent: Jan. 20, 2021).