Postoperative Respiratory Complications Research Articles

An unusual late complication of peridural anesthesia: The case of a subdural spinal epidermoid cyst: A case report and literature review

The peridural approach is primarily used today to provide analgesia in obstetrics and postoperative care. Peridural analgesia is not only more effective than systemic analgesia, but it also has benefits in terms of morbidity, particularly regarding postoperative respiratory complications and the shortened duration of postoperative ileus. Unlike dural tears, immediate and severe neurological complications such as hematomas or abscesses are very rare. Long-term sequelae are less well known because the relationship with epidural analgesia performed several months or years earlier is not always well established. We report a rare case of a 35-year-old patient with a history of epidural anesthesia five years ago during childbirth, who was admitted with cauda equina syndrome. MRI (magnetic resonance imaging) of the lumbar spine showed a subdural lesion at the level of L3. The patient underwent resection of the lesion, and the pathological examination of the surgical specimen concluded it was an epidermoid cyst.

Comparison of two modeling approaches for the identification of predictors of complications in children with cerebral palsy following spine surgery

BackgroundChildren with non-ambulatory cerebral palsy (CP) frequently develop progressive neuromuscular scoliosis and require surgical intervention. Due to their comorbidities, they are at high risk for developing peri- and post-operative complications. The objectives of this study were to compare stepwise and LASSO variable selection techniques for consistency in identifying predictors when modelling these post-operative complications and to identify potential predictors of respiratory complications and infections following spine surgery among children with CP.MethodsIn this retrospective cohort study, a large administrative claims database was queried to identify children who met the following criteria: 1) ≤ 25 years old, 2) diagnosis of CP, 3) underwent surgery during the study period, 4) had ≥ 12-months pre-operative, and 5) ≥ 3-months post-operative continuous health plan enrollment. Outcome measures included the development of a post-operative respiratory complication (e.g., pneumonia, aspiration pneumonia, atelectasis, pleural effusion, pneumothorax, pulmonary edema) or an infection (e.g., surgical site infection, urinary tract infection, meningitis, peritonitis, sepsis, or septicemia) within 3 months of surgery. Codes were used to identify CP, surgical procedures, medical comorbidities and the development of post-operative respiratory complications and infections. Two approaches to variable selection, stepwise and LASSO, were compared to determine which potential predictors of respiratory complications and infection development would be identified using each approach.ResultsThe sample included 220 children. During the 3-month follow-up, 21.8% (n = 48) developed a respiratory complication and 12.7% (n = 28) developed an infection. The prevalence of 11 variables including age, sex and 9 comorbidities were initially considered to be potential predictors based on the intended outcome of interest. Model discrimination utilizing LASSO for variable selection was slightly improved over the stepwise regression approach. LASSO resulted in retention of additional comorbidities that may have meaningful associations to consider for future studies, including gastrointestinal issues, bladder dysfunction, epilepsy, anemia and coagulation deficiency.ConclusionsPotential predictors of the development of post-operative complications were identified in this study and while identified predictors were similar using stepwise and LASSO regression approaches, model discrimination was slightly improved with LASSO. Findings will be used to inform future research processes determining which variables to consider for developing risk prediction models.

Noninvasive ventilation outside the intensive care unit for respiratory rehabilitation after on-pump cardiac surgery: a prospective randomized controlled trial

BACKGROUND: Сardiac surgery with cardiopulmonary bypass is associated with a high risk of postoperative respiratory complications. Perioperative damage to the lungs caused by ischemia and reperfusion, mechanical ventilation, trauma, etc., is a trigger for aseptic inflammation in the lungs, and it makes compromised lungs an easy target for infection. Actively developed methods of protecting the lungs, such as lung-protective ventilation, are limited to the perioperative and resuscitation stages and do not exhaust the entire range of respiratory support required in the later stages of postoperative hospitalization. This indicates the need for methods of respiratory rehabilitation following transfer from the intensive care unit. AIM: To evaluate the effectiveness of respiratory rehabilitation using noninvasive mask lung ventilation performed outside the intensive care unit in cardiosurgical patients compared to standard breathing exercises. MATERIALS AND METHODS: This prospective, randomized, single-center study included 60 patients aged 62±12 years who underwent cardiac surgery with cardiopulmonary bypass (86±17 min) with bypass grafting of 2±1 coronary arteries and required mechanical lung ventilation for more than 6 hours following surgery. After transfer from the intensive care unit, patients in the control group (n=30) underwent standard respiratory rehabilitation, and those in the main group (n=30) additionally received four sessions of noninvasive mask lung ventilation. RESULTS: The patients in the main group had a more rapid respiratory function recovery and, thus, reduced postoperative hospitalization time (10 [8; 15]) compared to those in the standard group (14 [13; 20]). CONCLUSION: The use of noninvasive mask lung ventilation outside the intensive care unit along with the standard respiratory activation protocol is safe and speeds up respiratory rehabilitation and reduces postoperative hospitalization of patients after coronary bypass surgery.

Laparoscopic versus open repair for peptic ulcer perforation: a systematic review, meta-analysis and trial sequential analysis of randomised controlled trials. Time to conclude!

The aim of this study was to investigate comparative outcomes of laparoscopic and open repair for peptic ulcer perforation (PUP). A PRISMA-compliant systematic review with a PROSPERO-registered protocol (registration number CRD42024529286) was conducted. All randomised controlled trials (RCTs) involving PUP patients managed by laparoscopic or open repair were identified and their risk of bias assessed. Outcome syntheses for perioperative mortality and morbidities, need for reoperation, procedure time and length of hospital stay were conducted using random-effects modelling to calculate risk ratios (RR) or mean difference (MD) with 95% confidence intervals (CI). Nine RCTs met the inclusion criteria, enrolling 670 patients of whom 317 were randomised to receive laparoscopic surgery and 353 were managed with open surgery. Laparoscopic repair of PUP significantly reduced mortality (RR 0.37, p = 0.03), total complications (RR 0.57, p = 0.0009), ileus (RR 0.43, p = 0.04), wound complications (RR 0.36, p < 0.0001) and length of hospital stay (MD -2.37, p = 0.0003) compared with the open approach. There were no significant differences in rate of postoperative leak (RR 2.00, 95% CI 0.74-5.41, p = 0.17), abdominal collection (RR 1.19, 95% CI 0.46-3.07, p = 0.72), sepsis (RR 1.17, 95% CI 0.39-3.52, p = 0.65), respiratory complications (RR 0.68, 95% CI 0.32-1.46, p = 0.32), reoperation (RR 1.74, 95% CI 0.57-5.30, p = 0.33) and operating time (MD 15.31, 95% CI -4.86 to 35.47, p = 0.14) between the two groups. Laparoscopic repair of PUP is associated with significantly lower mortality and morbidity and shorter length of stay compared with the open approach. The laparoscopic approach should be the management of choice subject to the existence of laparoscopic expertise.

Outcomes in adult congenital heart disease patients with Down syndrome undergoing cardiac surgery.

BACKGROUNDAs the life expectancy of patients with Down syndrome (DS) improves, the number of older DS patients requiring cardiac surgery for congenital heart disease will increase. Perioperative risk factors and outcomes in these patients are unknown. METHODSIn a multicenter retrospective study, teenage and adult DS patients undergoing cardiac surgery between 2008-2018 were matched by age and surgical procedure with non-DS patients. Demographic, medical, and surgical characteristics were compared. Outcome measures were length of stay (LOS), duration of mechanical ventilation, need for non-invasive positive pressure ventilation (NIPPV) and reintubation, additional cardiac interventions, postoperative infections, and early postoperative mortality. Risk factors for extended hospital LOS (>10 days) were explored using multivariable logistic regression. RESULTSWe compared 121 DS patients to 121 non-DS patients. DS patients had a longer median LOS (7 vs. 5 days, p<0.001), longer duration of mechanical ventilation (12.5 vs. 6.7 hours, p<0.001), greater need for NIPPV or reintubation (26% vs. 4%, p<0.001), and higher likelihood of postoperative infections (10% vs. 2%, p=0.035). There was no early mortality. Pre-operative risk factors for extended LOS for DS patients included pulmonary medication use (OR 4.0, p=0.046), history of immunodeficiency (OR 10.4, p=0.004), or ≥moderate tricuspid regurgitation (OR 12.7, p<0.001). CONCLUSIONSTeenage and adult DS patients undergoing congenital cardiac surgery had a longer hospital LOS and more postoperative respiratory and infection complications compared to non-DS patients without increased mortality. Cardiac surgery can be performed safely in older DS patients. Management of pulmonary disease, immunodeficiency, and tricuspid regurgitation may mitigate risk.

The Role of Preoperative Breathing Exercises in Reducing Postoperative Respiratory Complications in Coronary Artery Bypass Grafting: A Comparative Review of On-Pump and Off-Pump Techniques

Objectives: This review aims to evaluate the efficacy of preoperative breathing exercises in reducing postoperative respiratory complications, particularly respiratory failure, in patients undergoing CABG surgery. The review also compares the outcomes of these interventions in patients undergoing on-pump (ONCAB) versus off-pump (OPCAB) procedures. Methodology: A comprehensive literature search was conducted across multiple databases, including PubMed, Scopus, and Cochrane Library, to identify studies that examined the impact of preoperative breathing exercises on respiratory outcomes in CABG patients. The review focused on randomized controlled trials (RCTs) that compared the effectiveness of these exercises in ONCAB and OPCAB settings. Results: The review identified several studies supporting the role of preoperative breathing exercises in reducing postoperative respiratory complications. These exercises, including diaphragmatic breathing, incentive spirometry, and deep breathing, were associated with improved pulmonary outcomes, such as reduced incidence of respiratory failure, shorter durations of mechanical ventilation, and decreased hospital length of stay. While the overall results were positive for both ONCAB and OPCAB patients, variations were observed based on the surgical technique and patient-specific factors. Conclusion: Preoperative breathing exercises are an effective intervention for reducing the risk of postoperative respiratory complications in CABG patients. The benefits were observed in both ONCAB and OPCAB procedures, with particular advantages noted in the ONCAB group due to the higher baseline risk. Further research is needed to optimize these interventions, considering the individualized nature of patient responses and the specific characteristics of each surgical technique.

588. EFFICACY OF INTRAOPERATIVE RECURRENT LARYNGEAL NERVE MONITORING DURING MINIMALLY INVASIVE ESOPHAGECTOMY FOR ESOPHAGEAL CANCER: A NATIONWIDE INPATIENT COHORT STUDY

Abstract Background Lymphadenectomy around the recurrent laryngeal nerve (RLN) is an essential part of curative surgery for esophageal cancer. The rate of lymph node metastasis around the RLN is extremely high, and postoperative RLN palsy could lead to a poor prognosis in patients with esophageal cancer. Although several single-center studies have shown that intraoperative nerve monitoring (IONM) can avoid RLN palsy, this has not been confirmed in a large-scale multicenter study. This study was performed to evaluate whether intraoperative nerve monitoring IONM can reduce postoperative RLN palsy during minimally invasive esophagectomy (MIE) for esophageal cancer using a national database. Methods We retrieved data of patients with esophageal cancer who underwent MIE involving thoracoscopic or robotic esophagectomy with IONM (502 patients) and without IONM (4,353 patients) at 348 hospitals from April 2020 to March 2022 from the Diagnosis Procedure Combination database in Japan. We compared the frequency of postoperative RLN palsy and respiratory complications between the IONM (+) group and IONM (−) group using propensity score-matching (PSM) analysis. The propensity score was estimated using multivariable logistic regression models including age, sex, Body Mass Index, Brinkman index, Activities of Daily Living, comorbidities at admission, clinical TNM classification, approach of MIE, and hospital case volume with reference to previous studies of IONM. Results After PSM, the standardized bias was &amp;lt;10% for all covariates, which indicated improved balance in the covariates between the matched pairs. With 1-to-1 matching, 501 pairs (1,002 cases) were created between the IONM (+) and (−) groups. The postoperative RLN palsy rate was significantly lower in the IONM (+) than (−) group (odds ratio, 0.24; 95% confidence interval [CI], 0.13–0.46). The respiratory complication rate was also significantly lower in the IONM (+) than (−) group (odds ratio, 0.66; 95% CI, 0.45–0.97). The anesthesia time was significantly longer in the IONM (+) group (regression coefficient, 60.1 minutes; 95% CI, 44.2–76.9). The length of postoperative hospitalization tended to be shorter in the IONM (+) than (−) group (regression coefficient, −1.39 days; 95% CI, −3.91 to 1.14). Conclusion This nationwide cohort study showed that IONM during MIE for esophageal cancer can reduce postoperative RLN palsy and respiratory complications.

559. SURGICAL PROCEDURE AND CLINICAL OUTCOME OF TRANSMEDIASTINAL ESOPHAGECTOMY FOR ESOPHAGEAL CANCER

Abstract Background We started performing esophagectomy by a laparoscopic transhiatal approach in 2009, and 577 patients had undergone to date. Furthermore, we started performing single-port mediastinoscopic cervical approach in 2014, and developed a technique for total mediastinal lymph node dissection (390 patients). Methods The upper and middle mediastinal lymph node dissection including lymph nodes along the left recurrent laryngeal nerve, using a left cervical approach, was performed with a single-port mediastinoscopic technique. This approach with pneumomediastinum by AirSeal System improved the visibility and handling in the deep mediastinum around the aortic arch. We recently performed intraoperative monitoring of the recurrent laryngeal nerve using Nerve Integrity Monitor system. For dissection of upper and middle mediastinal lymph nodes, the left recurrent laryngeal nerve was sometimes compressed by the shaft of the sealing device or the retractor. We used continuous monitoring with the Automatic Periodic Stimulation electrode for the left recurrent laryngeal nerve, and immediately recognized dangerous procedures. Frequency of recurrent laryngeal nerve palsy was dramatically reduced to half by the introduction of Nerve Integrity Monitor system. Furthermore, to understand the anatomy of bilateral bronchial arteries, we performed 3-dimensional computed tomography angiography preoperatively, which was crucial to avoid intraoperative bleeding. Results The outcome of patients performed transmediastinal radical esophagectomy was compared with those performed the right thoracotomy by using propensity score matching. The operative time, the operative bleeding, and postoperative respiratory complications were significantly decreased by transmediastinal radical esophagectomy. Conclusion Our surgical procedure resulted in a good surgical view, safe en-bloc mediastinal lymph node dissection, and the decrease of postoperative respiratory complications. https://intconferenceservices-my.sharepoint.com/:v:/g/personal/barbarav_icsevents_com/ER9oAGbon3xJvdMGlJ2EUbIBgaq_8XDlKNA-wzVH3-7Hcg?nav=eyJyZWZlcnJhbEluZm8iOnsicmVmZXJyYWxBcHAiOiJPbmVEcml2ZUZvckJ1c2luZXNzIiwicmVmZXJyYWxBcHBQbGF0Zm9ybSI6IldlYiIsInJlZmVycmFsTW9kZSI6InZpZXciLCJyZWZlcnJhbFZpZXciOiJNeUZpbGVzTGlua0NvcHkifX0&amp;e=KbAfDr

FORÇA DOS MÚSCULOS VENTILATÓRIOS E O TREINAMENTO CARDIORRESPIRATÓRIO DE IDOSOS

The decrease in the ventilatory capacity of the muscles is related to postoperative respiratory complications and deaths of elderly individuals undergoing surgical procedures in the thorax and abdomen. Objective: To evaluate the effect of chronic cardiorespiratory training on the strength of the ventilatory muscles of elderly individuals. Methods: A sample of 24 individuals was randomized into the following groups: control (n=8), ventilatory training (n=7) and cardiorespiratory training (n=9). The primary outcome (MIP and MEP) was measured by a digital MDV®300 manometer (MDI/Brazil). A descriptive statistical analysis (mean and standard deviation) was performed, followed by a 3x3 ANOVA and Bonferroni post-hoc tests, all with significance of p ≤ 0.05. Results: The Pos test

Postoperative Respiratory Complications After Adenotonsillectomy in Children With High-Risk Obstructive Sleep Apnea.

Identify patient characteristics and polysomnogram (PSG) parameters associated with postoperative respiratory complications after adenotonsillectomy (AT) among children with high-risk obstructive sleep apnea (OSA). Case series with chart review. Tertiary care children's hospital. Pediatric patients (<18 years) with high-risk OSA (any 1 of: apnea-hypopnea index [AHI] >30, O2 nadir <80% and peak CO2 >60 mm Hg) on overnight PSG from 2019 to 2021 were included. Primary outcomes were major respiratory intervention during the postoperative admission, prolonged hospitalization, and intensive care unit (ICU) stay. A total of 307 patients met inclusion criteria. Median age was 6.5 years and 63% were male. Twenty-five (8.1%) required major respiratory intervention and 29 (9.7%) required ICU admission after AT. Major interventions and ICU admissions were significantly associated with neuromuscular disease (P < .01), higher obstructive apnea-hypopnea index (oAHI), higher CO2 peak, and lower O2 nadir. Prolonged admission had similar findings except oAHI was not significantly associated. Younger children were significant more likely to require ICU admission or prolonged admission. Increased oAHI and worsening O2 and CO2 parameters on preoperative PSG were associated with postoperative respiratory complications in children with high-risk OSA. Children with neuromuscular disease and age 0 to 2 had higher risk of ICU stay and prolonged hospitalization. Clinicians should recognize the importance of parameters beyond oAHI when anticipating postoperative monitoring.

Effect of positive airway pressure on obese patients undergoing surgery: a systematic review and meta-analysis

This systematic review and meta-analysis (SRMA) evaluates the efficacy and safety of Positive Airway Pressure (PAP) therapy in perioperative care for obese surgical patients. We reviewed 24 studies, encompassing data up to March 23, 2023, analyzing the impacts of Continuous Positive Airway Pressure (CPAP) and Bilevel Positive Airway Pressure (BIPAP) on postoperative adverse outcomes, oxygenation, and pulmonary function. Our findings underscore the significant potential of PAP therapy in managing obese patients during the perioperative period, particularly those at substantial risk for postoperative respiratory complications. PAP therapy not only enhances oxygenation levels and lung function but also substantially reduces the incidence of atelectasis and shortens hospital stays, thereby affirming its vital role in improving perioperative outcomes for this patient population.

The association of vaping and electronic cigarette use with postoperative hypoxemia and respiratory complications: a retrospective cohort analysis.

Initially introduced as a safer alternative to smoking, electronic cigarettes (e-cigarettes) and vaping have since been associated with lung injury. Nevertheless, there is limited perioperative data on their potential contribution to the harmful effects of mechanical ventilation on the lungs. We hypothesized that, in adults undergoing noncardiothoracic surgeries, preoperative vaping/e-cigarette use is associated with hypoxemia during the first postoperative hour, and with an increased incidence of intraoperative and postoperative pulmonary complications. We conducted a retrospective cohort study in which we included patients reporting as vapers/e-cigarette users within one year before surgery as the exposure group, and nonvapers as the control group. The primary outcome was the time-weighted average (TWA) SpO2/FIO2 ratio in the postanesthesia care unit during the first postoperative hour. The secondary outcome was a composite of intraoperative and postoperative pulmonary complications until discharge. We used entropy balancing to adjust for confounding, and fit weighted linear regression and logistic regression models to estimate treatment effects. A total of 110,940 patients met the inclusion criteria, and 1,941 of these were vapers/e-cigarette users. The average treatment effect on the treated for TWA SpO2/FIO2 ratio (N = 109,217) was estimated to be a mean difference of 4 (95% confidence interval [CI], 1 to 8; P = 0.007). This is equivalent to a 4% change in SpO2 at a 30% FIO2 (or at a fixed FIO2). The difference was statistically significant. The average treatment effect on the treated for experiencing intraoperative and postoperative pulmonary complications (N = 110,940) was an odds ratio of 1.04 (95% CI, 0.71 to 1.54; P = 0.84). Vaping/e-cigarette use was neither associated with clinically significant hypoxemia during the first hour in the postanesthesia care unit nor with an increase in pulmonary complications. Nevertheless, our findings cannot definitively exclude the deleterious effects of vaping and e-cigarette use on the lungs, and anesthesiologists should consider potential perioperative complications.

Intraoperative Recurrent Laryngeal Nerve Monitoring for Esophagectomy: A National Cohort Study

BackgroundLymphadenectomy around the recurrent laryngeal nerve (RLN) is an essential part of curative surgery for esophageal cancer. Although several single-center studies have shown that intraoperative nerve monitoring (IONM) can avoid RLN palsy, this has not been confirmed in a large-scale multicenter study. This study used a national database to evaluate whether IONM can reduce postoperative RLN palsy during minimally invasive esophagectomy (MIE) for esophageal cancer. MethodsWe retrieved data of patients with esophageal cancer who underwent 3-field thoracoscopic or robotic MIE with cervical anastomosis with IONM(+) (502 patients) and without IONM(−) (4353 patients) from April 2020 to March 2022 from the Diagnosis Procedure Combination database in Japan. We used propensity score-matching analysis to compare the frequency of postoperative RLN palsy and respiratory complications between the IONM(+) group and IONM(−) group. ResultsThe postoperative RLN palsy rate was significantly lower in the IONM(+) than IONM(−) group (odds ratio, 0.24; 95% CI, 0.13-0.46). The respiratory complication rate was also significantly lower in the IONM(+) than in the IONM(−) group (odds ratio, 0.66; 95% CI, 0.45-0.97). The anesthesia time was significantly longer in the IONM(+) group (regression coefficient, 60.1 minutes; 95% CI, 44.2-76.9 minutes). The length of postoperative hospitalization tended to be shorter in the IONM(+) than in the IONM(−) group (regression coefficient, −1.39 days; 95% CI, −3.91 to 1.14). ConclusionsThis national cohort study showed that IONM during 3-field MIE for esophageal cancer was associated with a reduction of postoperative RLN palsy and respiratory complications.

Preoperative Modified Frailty Index-11 versus EuroSCORE II in Predicting Postoperative Mortality and Complications in Elderly Patients Who Underwent Elective Open Cardiac Surgery: A Retrospective Cohort Study

ObjectivesThis study aimed to compare the sensitivity, specificity, receiver operating characteristic (ROC), and area under the curve (AUC) using modified frailty index (mFI), EuroSCORE II, and combined mFI-11 and EuroSCORE II to predict in-hospital mortality and composite morbidities. DesignRetrospective cohort study SettingSongklanagarind Hospital, a tertiary care center in the Southern of Thailand. ParticipantsElderly patients aged ≥ 60 years who underwent elective open-heart surgical procedures on a pump between January 2017 and December 2022 were included. InterventionsROC curves were constructed to evaluate the discriminatory power of EuroSCORE II and mFI-11 for predicting in-hospital mortality and postoperative complications. Measurements and Main ResultsThe actual in-hospital mortality was 2.5 % for all patients. The discriminative accuracy of mFI-11, EuroSCORE II, and combined mFI-11 with EuroSCORE II for predicting in-hospital mortality was good, with respective AUCs of 0.733 (95% CI 0.6157–0.8499), 0.793 (0.6826–0.9026), and 0.78 (0.6686–0.893). The AUC of mFI-11 for predicting postoperative cardiac, respiratory, neurological, and renal complications was 0.558 (95% CI 0.5101–0.6063), 0.606 (0.5542–0.6581), 0.543 (0.4533–0.6337), and 0.652 (0.5859–0.7179), respectively, and that of EuroSCORE II was 0.553 (0.5038–0.6013), 0.631 (0.578–0.6836), 0.619 (0.5306–0.7076) and 0.702 (0.6378–0.7657), respectively. ConclusionFrailty (mFI-11) and EuroSCORE II demonstrated good discrimination in ROC analysis, with EuroSCORE II showing superior predictive accuracy for in-hospital mortality in elderly elective cardiac surgery patients. However, neither score independently predicted mortality in multiple logistic regression, nor did combining them enhance predictive power significantly. Furthermore, both scores were less effective in predicting postoperative complications.

Impact of varied anesthesia maintenance strategies on postoperative respiratory complications in pediatric patients undergoing tonsillectomy and adenoidectomy (AmPRAEC study): study protocol for a multicenter randomized, double-blind clinical trial

BackgroundPostoperative respiratory adverse events are the most common perioperative complications in pediatric anesthesia, particularly prevalent in children undergoing tonsillectomy and adenoidectomy, with an incidence rate as high as 50%. The choice of anesthetic induction regimen directly influences the incidence of respiratory adverse events during the induction period. However, this effect seems to have minimal impact on postoperative outcomes. The occurrence rate of postoperative respiratory adverse events is likely more closely associated with the anesthetic maintenance phase, yet this relationship remains uncertain at present.MethodsThe objective of this study was to assess the impact of different anesthetic maintenance regimens on postoperative respiratory adverse events in pediatric patients undergoing tonsillectomy and adenoidectomy. The AmPRAEC study is a multicenter, randomized, double-blind controlled trial. A total of 717 pediatric patients were recruited from 12 medical centers and randomly assigned to three groups: group A (intravenous maintenance group, receiving propofol infusion); group B (intravenous-inhalational combination group, maintained with 1% sevoflurane combined with propofol); and group C (inhalational maintenance group, maintained with 2–3% sevoflurane inhalation). The primary outcome measure was the incidence rate of postoperative respiratory adverse events.DiscussionThis clinical trial aims to elucidate the impact of various anesthetic maintenance regimens on postoperative respiratory adverse events in pediatric patients. The outcomes of this study are anticipated to facilitate anesthesiologists in devising more comprehensive perioperative management strategies, enhancing comfort, and improving the clinical outcomes for this patient population.Trial registrationChinese Clinical Trial Registry (http://www.chictr.org.cn) ChiCTR2300074803. Registered on August 16, 2023.

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

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

Comparative Outcome Following Introduction Of Chest Physiotherapy At Hospital Setting After Major Abdominal Surgery

Background: Postoperative respiratory complications are still a matter of ‘folds in forehead’ for surgeons. Though optimum pre-operative preparation and good surgical technique, we always observe that there are some sorts of post-operative chest complications after major abdominal surgery. Now-a-days, chest physiotherapy is usually advised by the surgeons in the immediate postoperative period. But still it is not in a constructive way. There is no well-documented study regarding the effectiveness of chest physiotherapy in an immediate post-operative period of major upper abdominal surgery. So, this is a time demanding study in this regard. Objectives: To evaluate the effectiveness of chest physiotherapy during the immediate postoperative period among patients undergoing elective major abdominal surgery. Methods: All patients who underwent major abdominal surgery were selected by purposive sampling. Thereafter, they were scrutinized according to eligibility criteria and 100 patients were finalized. Among them, 50 were enrolled under control group and rest 50 were enrolled under study group. This experimental study was conducted in department of Surgery, Dhaka Medical College Hospital, Dhaka, from March 2017 to December 2017. Results: The mean age of the participants in control and study groups were 49.73±15.91 year and 53.77±12.21 year respectively. The female to male ratio in these groups was 1:2.13 and 1:3.17 respectively. Two groups presented similar levels of pain before and after surgery. The group receiving chest physiotherapy presented a lower pain score on the immediate postoperative day. The preoperative spirometry values (expressed as a percentage of the predicted values) were almost similar in two groups and presented average decreases of 20% in FVC, FEV, and PEF on the 14th post-operative day. It was observed that the measurements of oxygen-hemoglobin saturations were different for the control (96.7±1.6 vs 95.2±1.8; p=0.005) and study group (97.3±1.8 vs 94.6±2.5; p=0.03). Respiratory distress was not significantly higher in control group but interestingly there were statistically significant differences observed between the control and study group regarding fever, Surgical site infection (SSI) and mean hospital stay. Conclusion: Chest physiotherapy in major abdominal surgery shows an excellent outcome that accelerates the overall recovery. J Dhaka Med Coll. 2022; 31(2) : 177-181

A comparison of three-port and four-port Da Vinci robot-assisted thoracoscopic surgery for lung cancer: a retrospective study

BackgroundAt present, research comparing the short-term postoperative outcomes of anatomical resection in lung cancer under different ports of da Vinci robot-assisted surgery is insufficient. This report aimed to compare the outcomes of three-port and four-port da Vinci robot-assisted thoracoscopic surgery for radical dissection of lung cancer.Methods171 consecutive patients who presented to our hospital from January 2020 to October 2021 with non-small cell lung cancer and treated with da Vinci robot-assisted thoracoscopic surgery for radical resection of lung cancer were retrospectively collected and divided into the three-port group (n = 97) and the four-port group (n = 74). The general clinical data, perioperative data and life quality were individually compared between the two groups.ResultsAll the 171 patients successfully underwent surgeries. Compared to the four-port group, the three-port group had comparable baseline characteristics in terms of age, sex, tumor location, tumor size, history of chronic disease, pathological type, and pathological staging. The three-port group also had shorter operation time, less intraoperative blood loss, lower chest tube drainage volume, shorter postoperative hospitalization stay durations, but showed no statistically significant difference (P > 0.05). Postoperative 24, 48 and 72 h visual analogue scale pain scores were lower in the three-port group (p < 0.001). No significant difference was observed between the two groups in the hospitalization costs (P = 0.664), number or stations of total lymph node dissected (p > 0.05) and postoperative respiratory complications (P > 0.05).ConclusionsThe three-port robot-assisted thoracoscopic surgery is safe and effective and took better outcomes than the four-port robot-assisted thoracoscopic surgery in non-small cell lung cancer.

Cuffed versus uncuffed endotracheal tubes in neonates undergoing noncardiac surgeries: A randomized controlled trial.

The efficacy and safety of cuffed endotracheal tubes (ETTs) in neonates are still unclear, this study aimed to assess the efficacy of cuffed versus uncuffed ETTs in neonate undergoing noncardiac surgeries. Neonates scheduled for noncardiac surgeries were randomized into two groups according to the type of airway device during general anesthesia: cuffed ETT group (n = 60) and the uncuffed ETT group (n = 60). The primary outcome was the incidence of ETT exchange to find the appropriate ETT. Other outcomes included: duration of intubation, lung ultrasound score, and incidence of postoperative complications (croup, wheezes, hypoxia, etc.). The frequency of ETT exchange was lower in the cuffed ETT group compared to the uncuffed one {1 (1.7%) vs. 28 (46.7%), p = .0001; relative risk [95% confidence interval]: 0.54 [0.43-0.69]}. Postoperative adverse events were comparable between both groups except for significantly higher post extubation croup in the uncuffed ETT group compared to the cuffed ETT {10 (16.7%) vs. 3(5%), p value = .04, relative risk (95% confidence interval): 1.14 (1-1.29)}. In full term neonates undergoing noncardiac surgeries, the use of cuffed ETT was associated with less need to tracheal tube exchange and less incidence of postoperative croup, without increasing the postoperative respiratory complications compared to uncuffed ETT.

High-flow nasal oxygen versus conventional oxygen therapy during cesarean section under neuraxial anesthesia in pregnant women with heart disease: a randomized controlled trial

To evaluate the beneficial effects of high-flow nasal cannula (HFNC) oxygen therapy during cesarean section in pregnant women with heart disease. We conducted a single-center, single-blinded randomized trial of HFNC oxygen therapy in pregnant women with heart disease undergoing cesarean section under neuraxial anesthesia.The participants were randomly assigned to receive either HFNC oxygen therapy with inspiratory flow of 30 L/min with 40% FIO2(n=27) or conventional oxygen therapy (COT) with oxygen flow rate of 5 L/min via a nasal cannula (n=31).The primary outcome was maternal desaturation (SpO2 < 94% lasting more than 3 min or PaO2/FIO2≤300 mmHg). Maternal desaturation was observed in 7.4%(2/27) of the women in HFNC group and in 32.3%(10/31) in the COT group.None of the cases required tracheal intubation during the perioperative period.The HFNC group had a significantly higher incidence of postoperative leukocytosis (P < 0.05) but without pyrexia or other inflammation-related symptoms.There were no significant differences between the two groups in the secondary maternal outcomes (need for respiratory support, maternal ICU admission, postoperative respiratory complications, and cardiovascular complications) or neonatal outcomes (P>0.05). In pregnant women with heart disease, HFNC therapy can significantly reduce the rate of maternal desaturation during the perioperative period of cesarean section without adverse effects on short-term maternal or fetal outcomes.