Anesthesia Care Research Articles

Preoperative Challenges for Pediatric Ambulatory Surgery

The demand for ambulatory anesthesia in pediatric surgery has been increasing, reflecting a significant shift over recent decades toward performing a growing number of procedures in an outpatient setting.1 The growing shortage of pediatric anesthesiologists, coupled with an increase in pediatric ambulatory surgery volumes, will require general anesthesiologists to deliver anesthesia care to children. Children with prematurity, hypotonia, upper respiratory tract infections (URTI), obesity, and congenital heart disease (CHD) are frequently encountered in the ambulatory setting and present significant challenges for ambulatory anesthesiologists. In addition, the management of preoperative fasting, pregnancy testing, and perioperative anxiety further complicates the care of a pediatric patient. This review will examine the existing evidence and provide guidance for ambulatory anesthesiologists on preoperative considerations for pediatric patients undergoing ambulatory surgical procedures.

Response to "Comment on 'Effects of remimazolam versus dexmedetomidine on recovery after transcatheter aortic valve replacement under monitored anesthesia care: a propensity score-matched, non-inferiority study'".

Response to "Comment on 'Effects of remimazolam versus dexmedetomidine on recovery after transcatheter aortic valve replacement under monitored anesthesia care: a propensity score-matched, non-inferiority study'".

Abstract 4144517: Feasibility of Deep Sedation for Catheter Ablation of Atrial Fibrillation Using Pulsed Field Ablation

Introduction: General anesthesia is commonly utilized during catheter ablation of atrial fibrillation (AF) in the United States, providing patient immobility and permitting esophageal temperature management for radiofrequency ablation. Pulsed field ablation (PFA) is associated with shorter procedure time, less risk of esophageal injury, and less dependence on catheter stability compared with radiofrequency ablation. There are limited data available on performing the procedure with deep sedation as an alternative to general anesthesia with endotracheal intubation. Methods: Consecutive patients who underwent catheter ablation of AF at Endeavor Health (Chicago, IL) using pulsed field ablation (Farapulse, Boston Scientific, Marlborough, MA or PulseSelect, Medtronic, Minneapolis, MN) and deep sedation between March and May 2024 were retrospectively included in this study. Deep sedation (monitored anesthesia care) was administered by a certified registered nurse anesthetist and attending anesthesiologist, consisting of bolus and infusion dosing of propofol, dexmedetomidine, fentanyl, and midazolam at the discretion of the practitioner with continuous monitoring of vital signs and end-tidal CO2. The primary endpoint was the rate of airway complications or requirement for conversion to general anesthesia. Secondary endpoints were the rate of acute procedural success (all pulmonary veins isolated), total time in the EP lab, procedure time (from lidocaine to removal of sheaths), and non-procedure time (difference between total time in lab and procedure time). Results: A total of 40 patients (mean age 70.4 ± 13.6 years, BMI 30.2 ± 7.4, 60% females) were included in the analysis. There were no instances of airway complications or conversion from deep sedation to general anesthesia. There was a 100% rate of acute isolation of pulmonary veins. The average total time in the lab was 156.6 ± 41.5 minutes; consisting of a mean procedure time of 107.1 ± 39.7 minutes and non-procedure time 49.5 ± 10.3 minutes. Conclusions: In this initial experience at a single center, deep sedation (monitored anesthesia care) for PFA was associated with no instances of airway complications. The findings may not apply to patients with moderate or severe obstructive sleep apnea or other pulmonary diseases. Although patients generally were amnestic to the procedure, larger studies incorporating patient-reported outcomes are needed, as well as data regarding long-term clinical outcomes and cost.

Response to "Comment on effects of remimazolam versus dexmedetomidine on recovery after transcatheter aortic valve replacement under monitored anesthesia care: a propensity score-matched, non-inferiority study".

Response to "Comment on effects of remimazolam versus dexmedetomidine on recovery after transcatheter aortic valve replacement under monitored anesthesia care: a propensity score-matched, non-inferiority study".

Precision Medicine in Anesthesia: Pharmacogenomics and Personalized Care

Precision medicine in anesthesia represents a transformative approach aimed at optimizing anesthetic care by tailoring interventions to individual patient characteristics, particularly their genetic profile. Pharmacogenomics, a cornerstone of precision medicine, explores the genetic factors influencing drug metabolism, efficacy, and adverse reactions. This article delves into the integration of pharmacogenomics in anesthesia, discussing its impact on drug selection, dosage adjustments, and patient outcomes. It also highlights the potential for reducing perioperative complications, enhancing patient safety, and improving recovery through personalized anesthetic care. Challenges such as the need for robust genetic databases, ethical considerations, and the cost-effectiveness of implementing precision medicine in clinical practice are also discussed. The future of anesthesia lies in harnessing pharmacogenomics to provide individualized care, ultimately advancing patient-centric anesthetic management.

Comment on "Effects of remimazolam versus dexmedetomidine on recovery after transcatheter aortic valve replacement under monitored anesthesia care: a propensity score-matched, non-inferiority study".

Comment on "Effects of remimazolam versus dexmedetomidine on recovery after transcatheter aortic valve replacement under monitored anesthesia care: a propensity score-matched, non-inferiority study".

Comment on: "Effects of remimazolam versus dexmedetomidine on recovery after transcatheter aortic valve replacement under monitored anesthesia care: a propensity score-matched, non-inferiority study".

Comment on: "Effects of remimazolam versus dexmedetomidine on recovery after transcatheter aortic valve replacement under monitored anesthesia care: a propensity score-matched, non-inferiority study".

Combat-Relevant Anesthesia Fellowships Help Sustain the Army's Multidomain Medical Force.

In the community of Army Nurse Anesthetists, there is an underutilized potential for Combat-Relevant Fellowship training that, if enthusiastically encouraged and taken advantage of, would proffer many benefits to the Military Health System and the beneficiaries of its care. Most importantly, increased access to and encouragement for participation in these fellowships for Nurse Anesthetists would act as a tool for skill sustainment, denying any potential for skill degradation or readiness gaps in preparation for the next-generation war. These fellowships would also augment the already robust breadth, quality, and safety of Army Nurse Anesthetists' combat and noncombat anesthesia care, potentially increase Return-To-Duty rates, potentially expedite casualty clearance of the battlefield, increase the often-limited access to advanced pain management care for chronic pain patients in Military Treatment Facilities, increase the retention rates of Nurse Anesthetists, augment the military anesthesia community's knowledge-base, and help to advance the art of anesthesia as a whole. To triumph against the anticipated rigors of the future war's multidomain operational environment, we are duty bound to continually improve and strive to be the best versions of ourselves as soldiers, as professionals, and as communities. This paper will explore the untapped utility of Combat-Relevant Fellowships for Army Nurse Anesthetists.

Pericardial Fenestration With Monitored Anesthesia Care Using Diluted Remifentanil: A Series of 10 Cases

Pericardial Fenestration With Monitored Anesthesia Care Using Diluted Remifentanil: A Series of 10 Cases

Cardiac arrest in adult cardiology patients receiving anaesthetic care: analysis from the 7th National Audit Project (NAP7) of the Royal College of Anaesthetists.

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. 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. 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. 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.

Optimizing Pediatric Sedation: Evaluating Remimazolam and Dexmedetomidine for Safety and Efficacy in Clinical Practice.

Daily, children undergo countless investigations and interventions, which require sedation and immobilization to ensure safety and accuracy. This remains associated with a persistent risk of sedation-induced life-threatening events as children are particularly vulnerable to adverse medical events and complications. Consequently, there is an urgent need to increase the safety of pediatric sedation and anesthesia. An ideal approach involves the use of drugs with fewer intrinsic side effects. In this context, on the basis of their pharmacokinetic properties, remimazolam (RMZ) and dexmedetomidine (DEX) were evaluated for their suitability as ideal sedatives. RMZ and DEX, both of which are currently available in pediatric medicine, have shown great promise in initial publications. To date, only very limited data concerning RMZ in small children are available. RMZ is a novel, ultrashort-acting benzodiazepine that is metabolized by tissue esterase, largely independent of organ function. It has a context-sensitive half-life of approximately 10 min, with minimal accumulation even with prolonged use. Its effects can be completely reversed with flumazenil. DEX, an isomer of medetomidine, is a potent α2-receptor-agonist with multiple indications in anesthesia and intensive care medicine. It has coanalgesic potential, allows for 'arousal sedations' and has a low profile for cardiorespiratory side effects. DEX is metabolized in the liver and is predominantly excreted renally. Both drugs show potential in the prevention and treatment of delirium, with DEX having additional neuroprotective effects. DEX and RMZ possess several properties of an optimal sedative, including clinically insignificant main metabolites and a broad dosage range, indicating their potential to reduce the incidence of sedation-related life-threatening events in children. However, further clinical research is necessary to better evaluate their potential risks.

Optimizing pediatric tonsillectomy outcomes with an opioid sparing anesthesia protocol: Learning and continuously improving with real-world data.

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. 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. 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. 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.

ENDOSCOPIC SEDATION TYPE DURING FLIP PANOMETRY DOES NOT SIGNIFICANTLY IMPACT FLIP MOTILITY CLASSIFICATION RELATIVE TO MANOMETRY

Functional lumen imaging probe (FLIP) Panometry evaluates esophageal motility at the time of sedated endoscopy and often parallels high-resolution manometry (HRM) performed in awake patients. This study aimed to assess the impact of endoscopic sedation on FLIP evaluation of esophageal motility. Adult patients who completed FLIP Panometry during sedated endoscopy and had a conclusive Chicago Classification v4.0 diagnosis on HRM were included in this retrospective study. HRM diagnoses relative to FLIP Panometry motility classifications were compared by sedation type used during FLIP, i.e. conscious sedation (CS) with midazolam and fentanyl or monitored anesthesia care (MAC) with propofol. 454 patients (mean (SD) age 53 (17) years, 62% female) completed FLIP Panometry under CS (n=174, 38%) or MAC (n=280, 62%; 177/280 MAC included fentanyl). On comparison of CS vs MAC, HRM diagnoses within FLIP Panometry motility classifications did not differ (P=0.306 across all 5 FLIP Panometry classifications; P values 0.202-0.856 within specific FLIP classifications). The proportion of HRM diagnoses within each FLIP Panometry classification also did not differ between FLIP completed with CS vs MAC with fentanyl (P=0.098) or MAC without fentanyl (P=0.0261) CONCLUSIONS: Whether CS or MAC was used as sedation during FLIP did not have a clinically significant impact on the relationship between diagnosis on FLIP Panometry and HRM. This supports the validity of diagnosing esophageal motility disorders using FLIP Panometry during sedated endoscopy.

Strategies to Limit Benzodiazepine Use in Anesthesia for Older Adults

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. 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. 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. 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). Rate of benzodiazepine administration during anesthesia care and patient satisfaction with anesthesia care (measured by the Anesthesia Patient Satisfaction Questionnaire, version 2). 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. 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. Clinicaltrials.gov Identifier: NCT05436392.

A comparative study of two different doses of dexmedetomedine as an adjuvant to lignocaine in infiltration block for tympanoplasty: a triple-blinded, prospective, randomized controlled trial.

The ideal anesthetic drug choice for local infiltration anesthesia under monitored anesthesia care must provide analgesia and patients' comfort along with a bloodless surgical field for patients. We hypothesized that dexemedetomidine can provide better visibility of the surgical field at a higher dose of 1 µg/kg than 0.5 µg/kg, along with providing sedation and analgesia. After institutional ethics committee clearance and written informed consent, this prospective, randomized, triple blind study was conducted on ninety patients, between 18- 65 years who were scheduled for tympanoplasty. The patients were randomly assigned to either the dexmedetomidine (DEX) 0.5 group or the DEX 1.0 group, and received 10 ml solution containing 2% lignocaine with 0.5 µg/kg dexmedetomidine, or the 1 µg/kg dexmedetomidine. The operative surgeon performed local infiltration using standardized 5-point infiltration technique around the auricle. The primary objective was to compare the intraoperative bleeding at the surgical site. The comparison of normally distributed variables was conducted using the Student's t-test, whereas non-normally distributed variables was compared using the Mann-Whitney U test. The analysis of qualitative data was conducted using the chisquare/Fisher's exact test. A P value less than 0.05 was considered statistically significant. The overall bleeding score was significantly higher in the DEX 0.5 group (3.21 ± 0.727) than the DEX 1.0 group (1.43 ± 0.661) (P value < 0.001). The time to first analgesic requirement and surgeon satisfaction score were also significantly higher in the DEX 1.0 group. Combining dexmedetomidine at a dose of 1 µg/kg with 2% lignocaine for infiltration provided improved analgesia and improved the surgical field during tympanoplasty performed under monitored anesthesia care.

Chewing gum to treat postoperative nausea and vomiting in female patients: a multicenter randomized trial.

Postoperative nausea and vomiting (PONV) is common after general anesthesia, with consequences for patient outcomes, satisfaction with care and healthcare costs. Our aim was to compare a new treatment, chewing gum, with a widely-used intravenous agent, ondansetron, to treat PONV in female patients in the post anesthesia care unit (PACU). We conducted a multicenter, randomized, controlled non-inferiority trial in 17 hospitals in Australia and New Zealand. Female patients aged ≥12 years undergoing volatile anesthetic-based general anesthesia for laparoscopic or breast surgery were enrolled. Protocolized anti-emetic prophylaxis was administered. Patients who developed PONV in the PACU were randomized to either 15 min of chewing gum or 4 mg of intravenous ondansetron. The primary outcome was cessation of nausea, retching or vomiting, with no recurrence nor rescue medication for 2 h after administration of the randomized intervention (i.e., complete response). Of 865 enrolled patients, 218 were randomized. In a per-protocol analysis, 50 of 105 (47.6%) ondansetron-treated patients compared with 31 of 103 (30.1%) chewing gum-treated patients achieved the primary outcome (absolute risk difference [95% confidence interval (CI)] -17.3 [-30.4 to -4.3] %), not reaching our prespecified non-inferiority limit. Time to complete response was longer for patients randomized to chewing gum (hazard ratio [95% CI] 0.53 [0.34, 0.83]), and they were more likely to receive antiemetics in the 24 h after surgery (absolute risk difference [95% CI] 14.07 [1.65, 26.49]). Chewing gum cannot be recommended as an alternative to ondansetron for treatment of PONV in female patients administered antiemetic prophylaxis.

Intraoperative Cost Comparison of Endoscopic Carpal Tunnel Release With WALANT Versus MAC Anesthesia.

The cost of endoscopic carpal tunnel release (ECTR) has historically been shown to be significantly higher than the cost of open carpal tunnel release (OCTR). Setting and anesthetic technique drive costs in hand surgery; ambulatory surgical center (ASC) settings demonstrate lower costs when compared to hospital-based settings and local-only anesthetic techniques demonstrate savings over general anesthesia. The purpose of this study is to compare wide awake local-only anesthesia technique (WALANT) to monitored anesthetic care (MAC) for ECTR performed in an ASC setting. This study includes 481 ECTR under WALANT and 405 ECTR under MAC, performed between January 2019 and December 2021 in an ASC. Utilizing previously reported direct operating room costs, overhead, and material costs, we calculated a final cost for each procedure. We also report our complication rates: intraoperative conversion to OCTR and late revision to OCTR. Intraoperative times were shortest for ECTR performed under WALANT (22 min) versus ECTR under MAC (25 min). The total cost for ECTR under WALANT was most cost-effective at $1341.28 versus ECTR under MAC at $1634.00. Both techniques demonstrated a low complication profile. Our intraoperative process flow, staffing model, and ASC setting resulted in cost savings making ECTR an economically feasible option.

DIFFICULTIES AND CONSIDERATIONS IN ANESTHESIA FOR PREGNANT WOMEN: A LITERATURE REVIEW

Introduction: The management of anesthesia in pregnant women presents unique challenges due to the physiological changes that occur during pregnancy. A comprehensive understanding of these changes is essential for ensuring maternal and fetal safety. Objective: This study aims to explore the complexities of anesthetic management in pregnant women, focusing on the necessary adaptations in techniques, potential complications, and the impact of racial and socioeconomic disparities in access to care. Methods: A multidisciplinary approach was employed, including a review of current literature on anesthetic practices, complications, and healthcare disparities. Collaborative strategies among healthcare providers were also examined. A total of 10 articles were selected for meeting the research criteria. Results: The findings indicate that approximately 70% of studies emphasize the importance of tailored anesthetic techniques to address physiological changes. Additionally, disparities in access to anesthetic care were identified, highlighting the need for equitable health policies. Conclusion: Continued research and innovation are vital for improving anesthetic practices and ensuring that all pregnant women receive safe and effective care. This work contributes to the overarching goals of prioritizing maternal and neonatal safety and addresses systemic challenges in anesthetic management.

Intraoperative transfontanelle ultrasonography for pediatric patients.

Cerebral blood flow (CBF) plays a vital role in delivering cerebral oxygen, and the accurate assessment of CBF is crucial for the intraoperative management of critically ill infants. Although the direct measurement of CBF is challenging, CBF velocity (CBFV) can be assessed using transcranial Doppler. Recent advances in point-of-care ultrasound have introduced brain ultrasound as a feasible intraoperative option, in which transfontanelle ultrasonography (TFU) has been applied to measure the CBFV through the anterior fontanelle. However, the intraoperative application of TFU in pediatric patients remains limited. The present review highlights the procedural aspects and clinical applications of TFU for anesthetic and intensive care management in pediatric patients. TFU facilitates the visualization of cerebral vessels and allows a noninvasive assessment of cerebral hemodynamics. The clinical significance of TFU involves its usefulness in various clinical scenarios, including monitoring CBF during cardiac surgery, assessing fluid responsiveness, and estimating intracranial pressure. TFU also enables the detection of cerebral emboli and the evaluation of anatomical abnormalities such as hydrocephalus or intracranial hemorrhage. TFU has demonstrated potential as an invaluable tool in pediatric care, despite limited familiarity among anesthesiologists. Additional research is needed to explore the associations between CBF and clinical outcomes, focusing on autoregulation, the impact of physiological changes, the associations of TFU findings with other brain monitoring tools such as electroencephalography, cerebral oximetry, and the implications of microemboli. TFU is a significant advancement and valuable tool for noninvasively assessing cerebral hemodynamics and CBF in pediatric patients with open fontanelles.

Effect of visual lung recruitment manoeuvres guided by trans-oesophageal lung ultrasound on atelectasis after thoracoscopic lobectomy: a randomised, single-blind, prospective study

BackgroundAlthough the incidence of postoperative atelectasis could be reduced using lung recruitment manoeuvres, it remains high. We hypothesised that intraoperative visual lung recruitment guided by trans-oesophageal lung ultrasound would be more effective than the conventional method for managing postoperative atelectasis.MethodsIn this randomised, controlled, prospective study, 84 patients undergoing thoracoscopic lobectomy were recruited from Affiliated Chengdu Fifth People’s Hospital (teaching hospital) in China. Patients were grouped into trans-oesophageal lung ultrasound-guided (Group G, n = 42) and control (Group C, n = 42) groups.MethodsLung recruitment was performed after anaesthesia induction, before chest closure and before the endotracheal tube extubation. In Group C, recruitment pressure was controlled at 30 cm H2O for 10 s (performed thrice); in Group G, the pressure was controlled at 30 cm H2O (performed thrice), and the tidal volume did not exceed 20 ml kg−1 until no atelectasis was detected by trans-oesophageal ultrasound. The primary outcome was lung ultrasound scores measured at the post anaesthesia care unit 30 min after extubation. The secondary outcomes included the oxygenation index (30 min after extubation) and the incidence of atelectasis (30 min after extubation and 3 days after surgery).ResultsThe final analysis included 79 patients. The lung ultrasound score was significantly higher in the control group than in the ultrasound-guided group 30 min after extubation (Group C vs. Group G, 8.6 ± 2.6 vs. 6.5 ± 2.0, P < 0.001). No significant difference in the oxygenation indexes 30 min after extubation was observed between the groups (P = 0.074); however, the incidence of atelectasis 30 min after extubation significantly differed between the two groups (Group C vs. Group G, 57% vs. 33%, P = 0.031). The incidence of atelectasis 3 days after surgery did not significantly differ between the two groups (Group C vs. Group G, 45% vs. 28%, P = 0.122).ConclusionsLung recruitment guided by trans-oesophageal lung ultrasound can reduce lung ultrasound scores and the incidence of atelectasis at the post anaesthesia care unit 30 min after extubation. However, it does not significantly reduce the incidence of atelectasis 3 days after surgery.Trial registrationRegistration number: ChiCTR2200062509. Registered on 10 /8/ 2022.