Anesthesiologists Physical Status Research Articles

Cardiac output-guided haemodynamic therapy for patients undergoing major gastrointestinal surgery: OPTIMISE II randomised clinical trial

ObjectivesTo evaluate the clinical effectiveness and safety of a perioperative algorithm for cardiac output-guided haemodynamic therapy in patients undergoing major gastrointestinal surgery.DesignMulticentre randomised controlled trial.SettingSurgical services of 55 hospitals worldwide.Participants2498...

The effect of smart glasses combined with ultrasound on radial arterial catheterization: a randomized controlled trial

BackgroundThe integration of smart glasses with ultrasound technology offers a novel approach to improve the efficiency of radial arterial catheterization. Few studies have investigated the effectiveness of smart glasses in enhancing procedural outcomes in a clinical setting. This study aims to assess whether smart glasses combined with ultrasound can improve the initial success rate of radial artery catheterization compared to traditional ultrasound-guided methods in adults.MethodsThis single-blinded, randomized controlled trial enrolled patients aged 18–70 with American Society of Anesthesiologists physical status I-III, who required radial artery catheterization as part of their procedure under general anesthesia. Patients were randomized 1:1 into the ultrasound group and the smart glasses group. Radial arterial catheterization was carried out by one of six anesthesiologists before general anesthesia. The primary endpoint was the first puncture success rate. Secondary endpoints included hand-eye coordination (measured by head rotations, probe repositioning and needle redirections), operator’s satisfaction.ResultsA total of 222 patients were analyzed, with the smart glasses group demonstrating a higher rate of first puncture success compared to the control group (88.3% [98/111] vs. 72.1% [80/111]; P = 0.002; relative risk [RR], 1.23; 95% CI (1.07, 1.40)). Hand-eye coordination improved significantly in the smart glasses group than the control group, including: fewer number of head rotations (0 [0, 0] vs. 3 [2, 6]; P < 0.001); fewer number of ultrasound probe repositioning (0 [0, 0] vs. 0 [0, 1]; P < 0.001); fewer number of needle redirections (0 [0, 1] vs. 1 [0, 3]; P < 0.001). The proportion of positive satisfaction (81 to 100 points) in the smart glasses group was higher (89.2% [99/111] vs. 69.4% [77/111]; P < 0.001; RR, 1.29; 95% CI (1.12, 1.48)).ConclusionsThe use of smart glasses significantly improved the first puncture success rate, hand-eye coordination ability and operators’ satisfaction in radial arterial catheterization.Trial registrationThe study was registered at Chictr.org.cn with the number ChiCTR2400081399 on 29/02/2024.

Assessing the Optimal Dose of Mivacurium for Modified Rapid Sequence Intubation in Emergency Surgical Settings: A Randomized, Double-Blind Trial

Background: Modified rapid sequence intubation (RSI) is crucial in emergency surgery, particularly for patients with a full stomach, as it allows for the administration of general anesthesia (GA). Objectives: This work aimed to evaluate mivacurium effectiveness and optimal dose in modified RSI. Methods: This randomized double-blind study involved 100 patients, aged between 20 - 60 years, of both sexes, with the American Society of Anesthesiologists physical status classification of I - III, who were undergoing emergency surgery under GA. Patients were randomized into two equal groups and received mivacurium in a dose of 0.3 mg/kg in group M1 or 0.4 mg/kg in group muscarinic-2 (M2). Results: Intubating conditions were significantly better in group M2 than in group M1. The onset of adequate muscle relaxation was significantly earlier in group M2 than in group M1 (P &lt; 0.001). At the third minute, mean arterial blood pressure recordings were significantly lower in group M2 (P = 0.04) than in group M1. The recovery time was significantly longer in group M2 than in group M1 (P &lt; 0.001). Conclusions: Mivacurium in a 0.4 mg/kg dose resulted in more favorable intubating conditions during RSI and a more profound, earlier onset of muscle relaxation, but with a longer recovery time compared to the 0.3 mg/kg dose.

The efficacy and safety of remimazolam in painless colonoscopy: a prospective, randomized clinical trial.

Remimazolam is a new type of ultra-short-effect intravenous anesthetic, that may provide adequate sedation for endoscopy while causing less cardiovascular or respiratory disturbance than propofol. The aim of this clinical study was to compare the efficacy and safety of two different doses of remimazolam with propofol for sedation during colonoscopy. 225 subjects, aged 18 to 80 years, with American Society of Anesthesiology physical status I-III, were scheduled to undergo colonoscopy. All the subjects were randomly assigned to three groups, Low-Rem group (low dose remimazolam, 0.15 mg/kg, iv, n = 75), High-Rem group (high dose remimazolam, 0.2 mg/kg, iv, n = 75), and Propofol group (propofol 2 mg/kg, iv, n = 75). Every individual in this trial was given nalbuphine hydrochloride (0.2 mg/kg, iv) before administration of remimazolam or propofol. The primary outcome was the success rate of sedation. Haemodynamic parameters and adverse events were recorded to evaluate safety. Satisfaction of sedation from patients, anesthesiologists and gastroenterologists were also recorded. The success rate of colonoscopy procedure was 100% in both High-Rem and Propofol groups, but it was 89% in Low-Rem group (p < 0.05). Furthermore, the induction time of anesthesia was shorter in Propofol group, when compared to the Low-Rem group and the High-Rem group (p < 0.05). The recovery time in Low-Rem group, High-Rem group, and Propofol group was 2.33, 2.43, and 3.21 min (p < 0.05) respectively, and the time of discharge was 25.00, 25.01, and 27.56 min (p < 0.05) respectively. Simultaneously, the incidence of adverse events such as hypotension, bradycardia, and respiratory depression in the remimazolam groups were significantly lower than that in the propofol group. No significant differences were observed among the three groups in Ramsay scale, BPS-NI scale, and Limb movement classification. Moreover, patients, anesthesiologists, and gastroenterologists were all satisfied with the sedation process. Remimazolam can be used safely and effectively for colonoscopy. 0.2 mg/kg remimazolam and propofol have the same sedation success rate and more stable hemodynamics and fewer side effects than propofol. ChiCTR2100054053.

Microbiological comparison of the disinfecting efficacy of small and large cotton swabs in nasotracheal intubation: a randomized trial

BackgroundNasotracheal intubation (NTI) is necessary during surgeries requiring clear access to the surgical field and in patients with respiratory issues. This study investigates the pre-NTI nasal disinfection efficacy of different cotton swab sizes, hypothesizing that smaller swabs could minimize bleeding while maintaining disinfection efficacy.MethodsPatients classified as American Society of Anesthesiologists-physical status (ASA-PS) class 1 or 2 scheduled for general anesthesia with NTI were randomly assigned to either a large cotton swabs (LCS) or fine cotton swabs (FCS) group in this randomized controlled trial (RCT).” After anesthesia, a fine cotton swab was inserted into the inferior nasal meatus in both groups to collect bacteria (sample A). Next, the nasal cavity was disinfected with LCS or FCS according to the patient group. Bacteria were collected by inserting a fine cotton swab into the inferior nasal meatus (sample B). After surgery, bacteria were collected from the endotracheal tube tip using a fine cotton swab in both groups (sample C). The samples were cultured for 24 hours, and the colonies from samples A–C were counted. The changes in bacteria count between samples A and B and samples A and C were determined. Nasal bleeding from cotton swab insertion was assessed as a secondary outcome. Student’s t-tests, a chi-square independence test, and Mann–Whitney U tests were used for the statistical analysis. The statistical significance level was set at p < 0.05.ResultsBetween samples A and B, the change in bacteria count was 7.2% (1.4–26.1%) (median[interquartile range]) in the LCS group and 6.9% (0.9–22%) in the FCS group (p = 0.90). Between samples A and C, the change in bacteria count was 7.5% (0.2–44%) in the LCS group and 8.3% (0.3–39%) in the FCS group (p = 0.55). We examined 62 subjects in each group (LCS and FCS), and samples A, B, and C were collected from all participants in both groups. Nasal bleeding occurred in 42/62 in the LCS group and 22/62 in the FCS group (p < 0.01).ConclusionCotton swab thickness did not impact disinfection efficacy, but large swabs increased the risk of nasal bleeding. We recommend FCS for nasal disinfection prior to NTI in ASA 1–2 patients, as they reduce bleeding risk without compromising disinfection.Trial registrationUMIN-CTR (registration no. UMIN000051495), June 30, 2023.

Abstract 4115399: Comparative Outcomes of Local-Regional Versus General Anesthesia in Endovascular Aortic Aneurysm Repair: A Systematic Review and Meta-Analysis

Background: Endovascular Aortic Aneurysm Repair (EVAR) has emerged as a less invasive approach to aneurysm repair. However, the optimal anesthesia modality for elective cases—general or local-regional—remains uncertain. This meta-analysis compares the outcomes of local-regional versus general anesthesia (GA) for abdominal EVAR. Methods: We searched MEDLINE, Embase, and Cochrane databases for studies comparing local-regional and general anesthesia for EVAR up to May 2024. Following the PRISMA protocol, 1,796 articles were screened. Endpoints included 30-day mortality, type I endoleaks, length of hospital stay (LHS), and Intensive Care Unit (ICU) admissions. A random-effects model with odds ratios (OR) and 95% confidence intervals (CI) was used for binary endpoints and mean difference (MD) for continuous endpoints. Heterogeneity was assessed using Q and I2 statistics. The Grading of Recommendations, Assessment, Development, and Evaluations (GRADE) approach evaluated the quality of evidence. Results: Sixteen cohort studies, encompassing 70,654 patients treated with EVAR after excluding overlapping populations, were included. All groups had similar demographics, American Society of Anesthesiologists physical status, and aneurysm type. The mean age was 73.6 years, and 88.1% were male. Local-regional anesthesia was associated with significantly lower 30-day all-cause mortality (OR 0.74; 95% CI 0.55 to 0.99; p=0.049; I2=0, Figure A), shorter LHS (MD -0.72 days; 95% CI -1.29 to -0.15; p=0.01; I2=87%), and less ICU admissions (OR 0.53; 95% CI 0.31 to 0.93; p=0.027; I2=98%). There was no increase in endoleaks in the local-regional group (OR 0.78; 95% CI 0.55 to 1.09; p=0.143; I2=29%, Figure B). The GRADE rated this evidence as moderate certainty and high importance. Conclusion: Local-regional anesthesia may be preferable to general anesthesia for EVAR, as it reduces 30-day mortality, ICU admissions, and hospital stay length without increasing the risk of type I endoleaks.

Effective blind bilateral superficial cervical plexus block for tracheostomy tube insertion in a geriatric patient with Ludwig angina with hypertension in resource constrained area: a case report

IntroductionLudwig angina is a rare, rapidly spreading submaxillary, submandibular, and sublingual necrotizing life-threatening widespread cellulitis of the soft tissue on the floor of the mouth that can cause fatal complications because of airway obstruction. Currently, there are few published studies assessing the efficacy of superficial cervical plexus block for airway surgery and there is no agreement in the literature about airway management. The published recommendations differ and are based on the authors’ own experiences and available resources. This report aimed to provide insight into critical patient management by performing regional anesthesia with fewer complications to the cardiovascular and respiratory systems.Case presentationWe report the case of a 70 year-old hypertensive Black Ethiopian woman with American Society of Anesthesiologist–Physical Status class III and hypertension, who was admitted to the hospital for treatment by her surgeon. The surgeon diagnosed her with Ludwig angina. After adequate physical examination and laboratory investigation, she arrived at the operation room for exploration and drainage of the abscess with a superficial cervical plexus block. She arrived safely at the adult intensive care unit for frequent suctioning. The block was effective until 6 h after the procedure with visual analogue scale (2/10), her vital signs remained stable throughout the postoperative period, and then the tracheostomy tube was removed by the surgeon after 10 days. The patient’s hemodynamic status and breathing effort were satisfactory, and she was discharged 15 days later.Clinical discussionProper airway management is critical for the survival of patients diagnosed with Ludwig angina. According to recent studies, an increasing number of patients with Ludwig angina require intensive care unit admission for tracheal intubation and mechanical breathing. However, it is uncertain whether intensive care reduces the death rate in patients with Ludwig angina. Finally, it is suggested that studies with large sample sizes and strong levels of evidence be conducted to conclude the effectiveness of superficial cervical plexus block for airway emergency surgeries.ConclusionManagement of the airway in patients with Ludwig angina is challenging. Clinicians must take precautions and make sharp decisions on the basis of a variety of circumstances, including the availability of equipment at medical facilities, such as fiberoptic intubation equipment; the anesthetist’s level of experience, such as performing superficial regional block and good mask ventilation; and the patient’s medical status at the time of presentation. As a result, intervention needs to be quick so as to avoid airway obstruction and further complications.

Antibiotic Prophylaxis for Elective Pediatric Laparoscopic Cholecystectomies

BackgroundThe Surgical Infection Society (SIS) guidelines recommend against the use of surgical antibiotic prophylaxis (SAP) for low-risk patients undergoing elective laparoscopic cholecystectomies. MethodsUsing National Surgical Quality Improvement Program (NSQIP) data, 5440 pediatric patients were identified who underwent laparoscopic cholecystectomy from 2021 to 2022. Patients who had immunodeficiency, active malignancy, American Society of Anesthesiologists (ASA) physical status classification 3–5, procedure indicated for infection, emergent procedure, received intravenous antibiotics before the prophylaxis window, or missing SAP data were excluded. Results3959 patients were included in the analysis. Among these patients, 3570 (90.2 %) received SAP. Overall incidence of 30-day superficial incisional surgical site infection (SSI), deep incisional SSI, and organ space SSI were 0.9 %, 0.0 %, and 0.1 %, respectively. The incidence of superficial incisional SSI was significantly higher in the patients who did not receive SAP (SAP 0.8 %, no SAP 2.1 %; p = 0.024). The incidence of organ space SSI was also significantly higher in the patients who did not receive SAP (SAP 0.1 %, no SAP 0.8 %; p = 0.008). There was no difference in the incidence of C. diff colitis (SAP 0.1 %, no SAP 0.0 %; p = 1.000). Multivariable modeling, controlling for Hispanic ethnicity, age, and gender, demonstrated patients that received SAP were significantly less likely to have any postoperative SSI compared to patients who did not receive SAP (OR = 0.35). ConclusionHospitals are not currently compliant with SIS guidelines regarding omission of antibiotic prophylaxis for low-risk patients undergoing elective laparoscopic cholecystectomies. The authors advocate for additional studies and reassessment of current guidelines for pediatric patients given the above findings. Type of StudyRetrospective comparative study. Level of EvidenceIII.

Risk model for predicting failure to rescue after hepatectomy: Cohort study of 1371 consecutive patients.

Although hepatectomy is a complex surgical procedure, its incidence among older patients has increased due to global aging. However, few studies have focused on the association between age and failure to rescue (FTR) posthepatectomy. This study aimed to investigate the association between age and FTR and develop a risk model for FTR following hepatectomy. We analyzed a total of 1371 consecutive patients who underwent primary hepatectomy between July 2003 and September 2022. The patients were divided into three groups according to their age: young-old (<65years), pre-old (65-74years), and old group (≥75years). Additionally, the associations among age, FTR, and risk factors for FTR were investigated. Subsequently, a risk model was developed to predict the FTR. Of the 1371 patients, 373 (27.2%) experienced major complications, and FTR occurred in 15 patients. The older group showed a higher FTR rate (8.4%) than the young-old (1.3%) and pre-old (4.3%) groups (p=0.03). Multivariate analyses indicated that older age (odds ratio [OR] 1.07; 95% confidence interval [CI] 1.00-1.15; p=0.045) and American Society of Anesthesiologists Physical Status score ≥3 (OR 4.35; 95% CI 1.24-15.2; p=0.02) were independent predictive factors for FTR. The risk model exhibited an accuracy with an area under the curve of 0.80 (95% CI 0.69-0.92). Calibration plots of the model revealed a concordance index of 0.73. This study identified an association between age, FTR, and risk factors for FTR posthepatectomy. Together, our risk model is a clinically relevant, internally validated, and useful tool for predicting FTR posthepatectomy.

Development and validation of prediction models for prehospital triage of military trauma patients.

The introduction of wireless sensors will enable military care providers to continuously and remotely assess/monitor vital signs. Prediction models are needed to use such data adequately and aid military care providers in their on-scene decision-making to optimise prehospital triage and improve patient outcomes. A prospective cohort comprising data from eight Emergency Medical Services and seven inclusive trauma regions was used to develop and validate prediction models that could aid military care providers in their prehospital triage decisions. Healthy (American Society of Anesthesiologists physical status classification 1 or 2) admitted adult trauma patients (aged ≥16 and ≤50 years), who suffered from a trauma mechanism that could occur to military personnel and were transported by ambulance from the scene of injury to a hospital, were included. A full model strategy was used, including prehospital predictors that are expected to be automaticly collectible by wireless sensors or to be incorporated in a personalised device that could run the models. Models were developed to predict early critical-resource use (ECRU), severe head injury (Abbreviated Injury Scale (AIS) ≥4), serious thoracic injury (AIS ≥3) and severe internal bleeding (>20% blood loss). Model performance was evaluated in terms of discrimination and calibration. Prediction models were developed with data from 4625 patients (80.0%) and validated with data from 1157 patients (20.0%). The models had good to excellent discriminative performance for the predicted outcomes in the validation cohort, with an area under the curve of 0.80 (95% CI 0.76 to 0.84) for ECRU, 0.83 (0.76 to 0.91) for severe head injury, 0.75 (0.70 to 0.80) for serious thoracic injury and 0.85 (0.78 to 0.93) for severe internal bleeding. All models showed satisfactory calibration in the validation cohort. The developed models could reliably predict outcomes in a simulated military trauma population and potentially support prehospital care providers in their triage decisions.

Analgesic efficacy of ultrasound-guided rhomboid intercostal block versus serratus plane block in modified radical mastectomy: a prospective randomized controlled study.

This research aimed to assess the analgesic efficacy of ultrasound-guided rhomboid intercostal block (RIB) or serratus plane block (SPB) versus IV opioid among modified radical mastectomy (MRM) patients. One hundred and five female patients aged 18-65 years with American Society of Anesthesiologists (ASA) physical status II-III scheduled for unilateral MRM were randomly allocated into three equal groups: 1) control group (received IV basal analgesia); 2) SPB group (received ipsilateral SPB); and 3) RIB group (received ipsilateral RIB). Visual Analogue Scale (VAS) was significantly increased in control group compared to SPB group at Post-Anesthesia Care Unit (PACU) (1 [1-2], 0 [0-1]), 2 h (4 [3-4], 0 [0-1]), and 4 h (3 [3-4], 2 [1-2]) postoperative in control and SPB groups, respectively; and in comparison with RIB group at PACU (0 [0-1]), 2 h (1 [0-1]), 4 h, (1 [1-2]), 6 h (1 [1-2]), and 8 h (2 [1-2]), postoperative. VAS was significantly increased in SPB group at 6 h (4 [3-4]), and 8 h (4 [3.25-4]), compared to RIB group with P<0.0001. Time of first analgesic requirement (minutes) was significantly delayed in RIB (720 [480-720]) and SPB (360 [360-360]) groups in comparison with control group (60 [60-120]) and in RIB group in comparison with SPB group. The total postoperative 24 h morphine consumption (mg) was significantly increased in control group (15.69±1.64) when compared to SPB (9.6±1.42) and RIB (6.51±1.36) groups and in SPB group when compared to RIB group. Both rhomboid intercostal and serratus anterior plane blocks were efficient for analgesia after modified radical mastectomy. However, RIB had better analgesic efficacy compared to SPB.

Comparison of the Analgesic Efficacy of Ultrasound-Guided Transperineal Approach Using Pudendal Nerve Block Versus Caudal Block in Children Undergoing Urological Surgeries: A Randomized Controlled Trial.

Caudal block is an effective regional anesthesia technique for perineal surgeries but is associated with various adverse effects. Recently, pudendal nerve block has emerged as a promising alternative for these procedures. This study assessed the effectiveness of a novel transperineal technique for ultrasound-guided pudendal nerve block and compares it with ultrasound-guided caudal block for perineal surgeries in pediatric patients. The study included 60 American Society of Anesthesiologists (ASA) Physical Status Classification Systemgrade I/II children aged 1-12 years and scheduled for elective perineal operations under general anesthesia. Patients were randomly allocated to two equal groups: Group C (ultrasound-guided caudal block) and Group P (ultrasound-guided pudendal nerve block). The groups were evaluated for time to first rescue analgesia (primary outcome), block performance time, total analgesic consumption, Face, Legs, Activity, Cry, and Consolability (FLACC) scores, time to achieve a Post-Anesthetic Discharge Scoring System (PADSS) score of 9, and any complications. The median interquartile range (IQR) first rescue analgesia time was significantly higher in the pudendal block (17.5 (17-18) hours vs 4.65 (4.5-4.77) hours; p<0.001). The median (IQR) dose of postoperative analgesia (diclofenac) required was similar in the pudendal block group and caudal group (10 (0-10) mg vs 10 (0-20) mg; p=0.290). The median (IQR) FLACC scores at "zero" hour post-surgery were 2 (2-2) and 2 (1-2) in the pudendal and caudal groups, respectively (p=0.052). The median (IQR) PADDS score was significantly higher in the pudendal group (10 (9.25-10) vs 9 (8-9); p<0.001). The time to reach a PADSS score of 9 was significantly longer in the pudendal group (21.4±3 vs 14.9±4.8 hours; p<0.0001). There were no complications in either group. The findings of this study suggest that pudendal nerve blockprovides longer-lasting analgesia, lower pain scores, andfaster readiness for discharge though with a similar analgesic consumption compared to caudal block. These resultsindicate the potential of ultrasound-guided pudendal nerve blocks as a beneficial and safe alternative to caudal block for perineal procedures in children.

Lessons learned from implementing laparoscopic common bile duct exploration at a safety net hospital

BackgroundMounting evidence favors one-stage laparoscopic cholecystectomy with common bile duct exploration over endoscopic retrograde cholangiopancreatography with cholecystectomy for choledocholithiasis. However, laparoscopic cholecystectomy with common bile duct exploration remains underused. In 2020, our center initiated a laparoscopic cholecystectomy with common bile duct exploration program for choledocholithiasis. This study compares the experience and outcomes of laparoscopic cholecystectomy with common bile duct exploration compared with endoscopic retrograde cholangiopancreatography with cholecystectomy at a safety net hospital. MethodsThis single-center, retrospective study analyzed data from 179 patients admitted with choledocholithiasis from 2019 to 2023. Demographics, preoperative investigations, intraoperative details, and postoperative outcomes were evaluated. ResultsThe study included 179 patients (55.6 ± 21.0 years, 66% female) with American Society of Anesthesiologists Physical Status Classification System score III (II–III) and body mass index 29 kg/m2 (25.8–35.5 kg/m2). Of these, 148 underwent endoscopic retrograde cholangiopancreatography with cholecystectomy and 31 underwent laparoscopic cholecystectomy with common bile duct exploration. Demographic and preoperative data were similar between groups. Laparoscopic cholecystectomy with common bile duct exploration achieved a 74.2% success rate. Laparoscopic cholecystectomy with common bile duct exploration’s average operative time was 180 (139–213) minutes, with a 3.2% postoperative bile leak and 35.4% requiring postoperative ERCP. Median lengths of stay were 3 (1–4) for laparoscopic cholecystectomy with common bile duct exploration and 4 days (3–7) for endoscopic retrograde cholangiopancreatography with cholecystectomy (Z = –3.16, P = .002). The number of readmissions were 1.2 ± 0.4 for laparoscopic cholecystectomy with common bile duct exploration and 1.9 ± 1.3 for endoscopic retrograde cholangiopancreatography with cholecystectomy (t = 1.43, P = .08). Additional procedures for choledocholithiasis were performed in 36% of laparoscopic cholecystectomy with common bile duct exploration and 79% of ERCP + LC cases (χ2 = 21.7, P < .0001). ConclusionThe study highlights challenges in implementing laparoscopic cholecystectomy with common bile duct exploration at a safety net hospital. Results support laparoscopic cholecystectomy with common bile duct exploration over endoscopic retrograde cholangiopancreatography, with cholecystectomy, with shorter stays, fewer readmissions, and fewer additional procedures reported. Laparoscopic cholecystectomy with common bile duct exploration remains underused, with only 17.3% of patients who underwent one-stage laparoscopic cholecystectomy with common bile duct exploration. Further research is needed for laparoscopic cholecystectomy with common bile duct exploration’s expansion as the superior choledocholithiasis treatment.

Pulmonary Atelectasis After Sedation With Propofol vs Propofol-Ketamine for Magnetic Resonance Imaging in Children

Little is known about the impact of different anesthetic agents used for routine magnetic resonance imaging (MRI) sedation on pulmonary function in children. To compare the incidence of pulmonary atelectasis after MRI sedation with propofol vs propofol-ketamine. This double-masked randomized clinical trial screened 117 consecutive pediatric patients aged 3 to 12 years with American Society of Anesthesiologists physical status I to II undergoing elective MRI under deep sedation from November 2, 2022, to April 28, 2023, at a tertiary referral center. Four patients met the exclusion criteria, and 5 patients refused to participate. The participants and outcome assessors were masked to the group allocation. During the MRI, the propofol group received 0.2 mL/kg of 1% propofol and 2 mL of 0.9% saline followed by a continuous infusion of propofol (200 μg/kg/min) and 0.9% saline (0.04 mL/kg/min). The propofol-ketamine group received 0.2 mL/kg of 0.5% propofol and 1 mg/kg of ketamine followed by a continuous infusion of propofol (100 μg/kg/min) and ketamine (20 μg/kg/min). The incidence of atelectasis assessed by lung ultrasonography examination. A total of 107 children (median [IQR] age, 5 [4-6] years; 62 male [57.9%]), with 54 in the propofol group and 53 in the propofol-ketamine group, were analyzed in this study. Notably, 48 (88.9%) and 31 (58.5%) patients had atelectasis in the propofol and propofol-ketamine groups, respectively (relative risk, 0.7; 95% CI, 0.5-0.8; P < .001). The incidence of desaturation and interruption of the MRI due to airway intervention or spontaneous movement did not significantly differ between the groups. The propofol-ketamine group showed a faster emergence time than the propofol group (15 [9-23] vs 25 [22-27] minutes in the propofol-ketamine vs propofol group; median difference in time, 9.0 minutes; 95% CI, 6.0-12.0 minutes; P < .001). No patient was withdrawn from the trial due to adverse effects. In this randomized clinical trial, the propofol-ketamine combination reduced sedation-induced atelectasis while allowing for faster emergence compared with propofol alone. cris.nih.go.kr Identifier: KCT0007699.

Prognostic Value of Systemic Inflammatory Response in Lymph Node-Negative Colorectal Cancer.

The aim of this study was to investigate the prognostic value of systematic inflammatory response in patients with lymph node-negative colorectal cancer. We retrospectively investigated 245 patients with lymph node-negative colorectal cancer who underwent curative resection and evaluated the prognostic impact of systematic inflammatory response, which was represented by neutrophil-to-lymphocyte ratio (NLR), prognostic nutritional index (PNI), and C-reactive protein-to-albumin ratio (CAR). Then, the prognostic significance of the systematic inflammatory response on survival was analyzed using the Kaplan-Meier method in patients selected by propensity score matching (PSM) analysis. In the multivariate analysis, CAR ≥ .081 (P = .004) was independent predictors of disease-free survival, while American Society of Anesthesiologists physical status ≥3 (P = .049) and CAR ≥ .081 (P < .001) were independent predictors of overall survival. By PSM analysis, PSM-high-CAR was significantly associated with worse disease-free survival (P = .043) and overall survival (P = .041) in patients with lymph node-negative colorectal cancer. C-reactive protein-to-albumin ratio may be a significant indicator of poor long-term outcomes in patients with lymph node-negative colorectal cancer.

Comparison of the effectiveness of subcostal transversus abdominis plane and rectus sheath blocks in postoperative analgesia in major open gynecological cancer surgeries: a prospective randomized study.

The transversus abdominis plane block (TAPB) is frequently used for postoperative analgesia in abdominal surgery. However, it remains insufficient for analgesia during upper abdominal surgeries. Therefore, we compared the efficacy of the subcostal transversus abdominis plane block (STAPB) or rectus sheath block (RSB), in addition to the posterior transversus abdominis plane block (PTAPB), for postoperative analgesia in major gynecologic cancer surgeries. This prospective randomized study included 50 patients aged > 18 years (American Society of Anesthesiologists physical status II or III), who underwent gynecologic cancer surgery through a midline incision. All patients underwent PTAPB, STAPB, or RSB according to the randomization. The following parameters were recorded and compared: demographic data; intraoperative hemodynamic parameters; numeric rating scale (NRS) pain levels at the 1st, 6th, 12th, and 24th postoperative hours; opioid consumption; number of requests and boluses; adverse effects; surgical complications within 24 h. Forty-seven patients were included in this study. In the STAPB group, postoperative 1, 12 and 24 h NRS values were lower; opioid consumption, opioid demand, and bolus numbers were lower during the postoperative 24 h as compared to RSB (P < 0.05). The intraoperative opioid and hemodynamic values were similar in both groups. STAPB in addition to PTAPB provides more effective analgesia than RSB for postoperative pain management in open gynecologic cancer surgeries.

Is it worth using the Comprehensive Complication Index over the Clavien-Dindo classification in elderly patients who underwent percutaneous nephrolithotomy?

To compare the Comprehensive Complication Index (CCI) to the Clavien-Dindo classification (CDC) in an elderly population who underwent percutaneous nephrolithotomy (PCNL) and to identify predictors of postoperative complications in this population. We conducted a retrospective cohort study involving patients 60years and older who underwent PCNL at our Institution between 2009 and 2020. Postoperative complications were considered up to 30days after surgery. Both CDC and CCI were calculated to assess patient outcomes. Length of stay (LOS) and admission to the emergency room (ER) were used as surrogates of postoperative complications. We included 244 patients with a median age of 65 [63-69] years. 15.6% presented postoperative complications, and 2.5% multiple complications. LOS had a correlation coefficient of 0.29 (p < 0.001) and ER admissions had a coefficient of 0.27 (p < 0.001) with both CDC and CCI. Cost of hospitalization based on CDC underestimated CCI-based cost of hospitalization in 0.8% (p = 0.049). Higher American Society of Anesthesiology (ASA) physical status (p = 0.02), Charlson Comorbidity Index (p = 0.008), Guy's classification (p = 0.005), and history of urinary tract infection (UTI, p = 0.047) exhibited significant correlations with postoperative complications. Both CDC and CCI equally correlate with LOS and ER admissions following PCNL in elderly patients. However, CDC underestimates cost of hospitalization in comparison to CCI. We found higher ASA physical status, Charlson Comorbidity Index, Guy's classification, and history of UTI as predictors of postoperative complications after this procedure in this population.

The influence of anesthetic drug strategy on the incidence of post-induction hypotension in elective, non-cardiac surgery – A prospective observational cohort study

Study objectivesTo identify the influence of modifiable factors in anesthesia induction strategy on post-induction hypotension (PIH), specifically the type, dosage and speed of administration of induction agents. A secondary aim was to identify patient related non-modifiable factors associated with PIH. DesignSingle-center, prospective observational cohort study. SettingOperating room. PatientsAdult, ASA I-IV patients undergoing elective, non-cardiac surgery under general anesthesia (GA). InterventionsNone. MeasurementsContinuous non-invasive blood pressure using finger-cuff technology. PIH was defined as mean arterial pressure (MAP) <65 mmHg ≥1 min, and, separately, as a > 30 % decrease from baseline MAP ≥1 min. Main resultsStudy measurements were performed in 760 patients, of which 720 were suitable for analysis. A total of 238 patients (33.1 %) experienced PIH according to the 65 mmHg threshold, and 287 (39.9 %) using the 30 % decrease in MAP threshold. Remifentanil administration was associated with increased risk of PIH according to either definition (MAP <65 mmHg: OR 1.88, 95 %CI 1.31–2.69, p < 0.001, 30 % MAP decrease: OR 1.66, 95 %CI 1.15–2.40, p = 0.007). Pre-emptive vasopressor use (before or during first minute of GA) was associated with reduced risk of PIH (MAP <65 mmHg: OR 0.65, 95 %CI 0.45–0.95, p = 0.027, MAP 30 % decrease: OR 0.58, 95 %CI 0.40–0.84, p = 0.004). Speed of propofol bolus administration, propofol bolus dose, and esketamine use were not associated with PIH in multivariable analysis. Propofol bolus dose decreased with increasing age and American Society of Anesthesiologists physical status classification. ConclusionsPIH was common in this patient cohort, regardless of the definition used. Two of the five examined modifiable factors were associated with PIH: remifentanil infusion was associated with an increased risk, and pre-emptive vasopressor use was associated with a decreased risk of PIH. No association between propofol dose and PIH was found, most likely due dose adjustment based on clinical assessment rather than a true absence of effect. Clinical registration numberThis study was registered in the Dutch Medical Research in Humans (OMON) register on 18 June 2019 (ID: NL7810). The study was approved by the Medical Ethics Committee of the Amsterdam UMC, location AMC, the Netherlands in December 2018 (NL 6748.018.18; 2018).

Effect of prophylactic infusion of norepinephrine on the prevention of hypotension during vertebroplasty: a randomized clinical trial

BackgroundTransient hypotension is a common occurrence during the implantation of bone cement. This placebo-controlled randomized clinical trial study investigated the effect of prophylactic infusion of norepinephrine on the incidence of hypotension in senior patients who underwent vertebroplasty.MethodsThe trial recruited patients who were greater than or equal to 65 years of age, had an American Society of Anesthesiologist physical status classification of I to III, and underwent vertebroplasty from August 2020 to August 2021 at the Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine in China. The patients were randomly grouped according to whether they received either a norepinephrine infusion of 0.05 µg/kg/min or an equivalent volume of saline 10 min before implantation of bone cement. Intraoperative hemodynamics were monitored continuously by the MostCare system at the following 7 time points: 10 min before implantation of bone cement and immediately, 30 s, 1, 3, 5, and 10 min after implantation of bone cement. We also recorded the number of hypotensive episodes and the total number of vasopressors after implantation of bone cement. Multivariable logistic regression was used to assess the risk factors associated with hypotension after implantation of bone cement.ResultsA total of 63 patients were randomized to the control group (n = 31; median [IQR] age, 74 [69–79] years) and the norepinephrine group (n = 32; median [IQR] age, 75 [71–79] years). The incidence of hypotension in the norepinephrine group was significantly lower than that in the control group after implantation of bone cement (12.5% vs. 45.2%; relative risk [RR], 3.61 [95% CI, 1.13–15.07]; P = 0.005). Moreover, the median (IQR) number of hypotensive episodes (0 [0–0] vs. 0 [0–2]; P = 0.005) and the total number of vasopressors (0 [0–0] vs. 0 [0–1]; P = 0.004) in the norepinephrine group were significantly lower than those in the control group. Furthermore, compared with the baseline, the MAP significantly decreased at 1 min (P = 0.007) and 3 min (P < 0.001) after bone cement implantation in the control group. However, the MAP at 3 min in the norepinephrine group was significantly higher than that in the control group (P < 0.001). The incidence of complications was not different between the groups. In multivariable logistic regression, the FRAIL score (OR, 2.29; 95% CI, 1.21–4.31) was identified as a risk factor associated with hypotension.ConclusionProphylactic infusion of norepinephrine before bone cement implantation can stabilize hemodynamics and reduce the incidence of hypotension after implantation of bone cement.

Comparing the Functional Analysis of Baska® Mask with I-gel in Short Surgeries - A Prospective Randomized Trial.

We have compared sealing pressure, usability, and complications of two second-generation supraglottic airway devices-Baska® mask and I-gel. The study design involves prospective randomized controlled trial. The study was undertaken involving 44 patients of the American Society of Anesthesiologists physical status I and II, aged 20-70 years, who underwent surgical procedures of short duration under general anesthesia. Patients were randomly categorized into two groups of 22 each: Group B (Baska® mask) and Group I (I-gel). The main objective was to compare oropharyngeal leak pressure (OLP). Continuous variables were compared between the two groups using an unpaired t-test. Categorical variables were compared using the Chi-square test and insertion attempts using Fisher's exact test. Group B had significantly higher mean OLP (32.22 ± 2.52 cmH2O vs. 26.18 ± 2.42 cmH2O, P < 0.001). In Group I, 97.1% of patients had very easy insertion (Grade 1), 2.9% had easy insertion (Grade 2) and Group B had very easy insertion in 50% of patients, easy in 36.4%, and difficult in 13.6% of patients (P = 0.009). Group B took a longer time for successful insertion than Group I (39.89 ± 7.15 s vs. 28.19 ± 3.29 s, P < 0.001). For positive pressure ventilation, both I-gel and Baska® masks proved to be successful, with I-gel being easier and quicker to insert. It is possible to employ the Baska® mask with superior seal pressures as an alternative to endotracheal intubation in elective surgeries if there are no patient contraindications.