Transfusion and Mortality in Acute Care Surgical Patients in Malawi: A Propensity-Matched Analysis.

INTRODUCTION: Information on transfusion-associated outcomes is limited in sub-Saharan Africa. We sought to characterize predictors of mortality in transfused patients with acute care surgical conditions in Malawi. METHODS: We performed a retrospective propensity-matched analysis of patients with acute care surgical conditions at Kamuzu Central Hospital in Malawi from 2013 to 2021. We compared outcomes between patients who did and did not receive transfusions. RESULTS: A total of 7395 patients were included. Transfused patients (n = 1086) were older (median 43 y with interquartile range 30-59, versus 39 y [interquartile range 27-53] in the nontransfused group, P < 0.01), had a higher proportion of females (41% versus 27%, P < 0.01), presented earlier to the hospital (median 2.9 versus 3.7 d, P = 0.02), and with lower hemoglobin levels (27% versus 1% < 7 g/dL, P < 0.01). They had a lower rate of surgical intervention (48% versus 59%, P < 0.01) but a higher rate of complications (62% versus 33%, P < 0.01). Crude in-hospital mortality was 25.5% for the transfused group and 12.8% for the nontransfused group (P < 0.01). After propensity matching, transfused patients had three times the odds of mortality compared to nontransfused patients (odds ratio 3.3, 95% confidence interval 2.3, 4.8). CONCLUSIONS: In this propensity-matched study, transfused surgical patients were more likely to experience in-hospital mortality. These results suggest that the transfusion requirement reflects critical illness and warrants further investigation in this low-resource setting.

Predictors of Functional Decline Among Critically Ill Surgical Patients: A National Analysis.

INTRODUCTION: Functional decline is associated with critical illness, though this relationship in surgical patients is unclear. This study aims to characterize functional decline after intensive care unit (ICU) admission among surgical patients. METHODS: We performed a retrospective analysis of surgical patients admitted to the ICU in the Cerner Acute Physiology and Chronic Health Evaluation database, which includes 236 hospitals, from 2007 to 2017. Patients with and without functional decline were compared. Predictors of decline were modeled. RESULTS: A total of 52,838 patients were included; 19,310 (36.5%) experienced a functional decline. Median ages of the decline and nondecline groups were 69 (interquartile range 59-78) and 63 (interquartile range 52-72) years, respectively (P < 0.01). The nondecline group had a larger proportion of males (59.1% versus 55.3% in the decline group, P < 0.01). After controlling for sociodemographic covariates, comorbidities, and disease severity upon ICU admission, patients undergoing pulmonary (odds ratio [OR] 6.54, 95% confidence interval [CI] 2.67-16.02), musculoskeletal (OR 4.13, CI 3.51-4.87), neurological (OR 2.67, CI 2.39-2.98), gastrointestinal (OR 1.61, CI 1.38-1.88), and skin and soft tissue (OR 1.35, CI 1.08-1.68) compared to cardiovascular surgeries had increased odds of decline. CONCLUSIONS: More than one in three critically ill surgical patients experienced a functional decline. Pulmonary, musculoskeletal, and neurological procedures conferred the greatest risk. Additional resources should be targeted toward the rehabilitation of these patients.

Evaluating Global Surgery Partnerships From Low and Middle Income Country Perspectives.

INTRODUCTION: Little is known about perceptions of low-income and middle-income country (LMIC) partners regarding global surgery collaborations with high-income countries (HICs). METHODS: A survey was distributed to surgeons from LMICs to assess the nature and perception of collaborations, funding, benefits, communication, and the effects of COVID-19 on partnerships. RESULTS: We received 19 responses from LMIC representatives in 12 countries on three continents. The majority (83%) had participated in collaborations within the past 5 y with 39% of collaborations were facilitated virtually. Clinical and educational partnerships (39% each) were ranked most important by respondents. Sustainability of the partnership was most successfully achieved in domains of education/training (78%) and research (61%). The majority (77%) of respondents reported expressing their needs before HIC team arrival. However, 54% of respondents were the ones to initiate the conversation and only 47% said HIC partners understood the overall environment well at arrival to LMIC. Almost all participants (95%) felt a formal process of collaboration and a structured partnership would benefit all parties in assessing needs. During the COVID-19 pandemic, 87% of participants reported continued collaborations; however, 44% of partners felt that relationships were weaker, 31% felt relationships were stronger, and 25% felt they were unchanged. CONCLUSIONS: Our study provides a snapshot of LMIC surgeons' perspectives on collaboration in global surgery. Independent of location, LMIC partners cite inadequate structure for long-term collaborations. We propose a formal pathway and initiation process to assess resources and needs at the outset of a partnership.

The Bidirectionality of Global Surgical Research: The Utility of the Malawi Trauma Score in the United States Trauma Population.

INTRODUCTION: Trauma scoring systems provide valuable risk stratification of injured patients. Trauma scoring systems developed in resource-limited settings, such as the Malawi Trauma Score (MTS), are based on readily available clinical information. This study sought to test the performance of the MTS in a United States trauma population. MATERIALS AND METHODS: We analyzed the United States National Trauma Data Bank during 2017-2020. MTS uses alertness score: alert, responds to verbal or painful stimuli, or unresponsive (AVPU), age, sex, presence of a radial pulse, and primary anatomic injury location. MTS and an age-adjusted version reflective of the US age distribution, was evaluated for its performance in predicting crude mortality in the National Trauma Data Bank using receiver operating characteristic analysis. We utilized logistic regression to model the odds ratio of death at a particular MTS cutoff. RESULTS: A total of 3,833,929 patients were included. The mean age was 49.3 y (sandard deviation 24.4), with a male preponderance (61.1%). Crude mortality was 3.4% (n = 131,452/3,833,929). The area under the curve for the MTS in predicting mortality was 0.87 (95% CI 0.87, 0.88). The area under the curve for a cutoff of 15 was 0.83 (95% CI 0.83, 0.83). An MTS of 15 higher had an odds ratio of death of 46.5 (95% CI 45.9, 47.1), compared to those with a score of 14 or lower. CONCLUSIONS: MTS has excellent performance as a predictor of mortality in a US trauma population. MTS is simple to calculate and can be estimated in the prehospital setting or the emergency department. Consequently, it may have utility as a triage tool in both high-income trauma systems and resource-limited settings.

Blood Utilization and Thresholds for Mortality Following Major Trauma.

INTRODUCTION: Blood loss is a hallmark of traumatic injury. Massive transfusion, historically defined as the replacement by transfusion of 10 units of packed red blood cells (PRBCs) in 4 h, is a response to uncontrolled hemorrhage. We sought to identify blood transfusion thresholds in which predicted mortality exceeds 50%. METHODS: We analyzed the 2017-2019 National Trauma Database. Inclusion criteria included patients ≥18 y who received ≥1 unit of PRBCs. Statistical analysis included bivariate analysis, logistic regression for mortality, and adjusted predicted probability modeling was utilized. RESULTS: We identified 61,676 patients for analysis. The 50% predicted mortality for all patients was 31 PRBC units. The 50% predicted mortality was 6 units of PRBCs for elderly trauma patients 80 y and older. CONCLUSIONS: Blood remains as scarce resource in hospitals especially with trauma. Patients receiving a massive transfusion over a short period of time may exhaust blood bank supply with diminishing survival benefit. Surgeons should be judicious regarding continued blood usage once the 50% predicted mortality threshold is reached.

Appendectomy by Pediatric Surgeons in North Carolina is Associated With Higher Charge Than General Surgeons.

INTRODUCTION: The delivery of pediatric surgical care for acute appendicitis involves general surgeons (GS) and pediatric surgeons (PS), but the differences in clinical practice are primarily undescribed. We examined charge differences between GS and PS for the treatment of pediatric acute appendicitis. METHODS: We performed a retrospective review of the North Carolina hospital discharge database (2013-2017) in pediatric patients (≤18 y) who had surgery for appendiceal pathology (acute or chronic appendicitis and other appendiceal pathology). We performed a bivariate analysis of surgical charges over the type of surgical providers (GS, PS, other specialty, and unassigned surgeons). RESULTS: Over the study period, 21,049 patients had appendicitis or other diseases of the appendix, and 15,230 (72.4%) underwent appendectomy. Patients who were operated on by PS were younger (10 y, interquartile range (IQR): 6-13 versus 13 y, IQR: 9-16, P < 0.001). Acute appendicitis was diagnosed in 2860 (44.3%) and 3173 (49.2%) of the PS and GS cohorts, respectively, P = 0.008. PS compared to GS performed a higher percentage of laparoscopic (n = 2,697, 89.4% versus n = 2,178, 65.5%) than open appendectomies (n = 280, 9.3% versus n = 1,118, 33.6%), P < 0.001. The overall hospital charges were $28,081 (IQR: $21,706-$37,431) and $24,322 (IQR: $17,906-$32,226) for PS and GS, respectively, P < 0.001. Surgical charges where higher for PS than GS, $12,566 (IQR: $9802-$17,462) and $8051 (IQR: $5872-$2331), respectively. When controlling for diagnosis, surgical approach, emergent status, age, and surgical cost of appendiceal surgery, and hospital charges following appendiceal surgery were $4280 higher for PS than GS (95% CI: 3874-4687). CONCLUSIONS: The total charge for operations for appendiceal disease is significantly higher for PS compared to GS. Pediatric surgeons had increased surgical charges compared to GS but decreased radiology charges. The specific reasons for these differences are not clearly delineated in this data set and persist after controlling for relevant covariates. However, these data demonstrate that increasing value in pediatric appendicitis may require specialty-based targets.

Nonoperative Management Versus Laparoscopic Appendectomy in Children: A Cost-Effectiveness Analysis.

INTRODUCTION: Nonoperative management (NOM) of acute appendicitis in the pediatric population is highly debated with uncertain cost-effectiveness. We performed a decision tree cost-effectiveness analysis of NOM versus early laparoscopic appendectomy (LA) for acute appendicitis in children. METHODS: We created a decision tree model for a simulated cohort of 49,000 patients, the number of uncomplicated appendectomies performed annually, comparing NOM and LA. We included postoperative complications, recurrent appendicitis, and antibiotic-related complications. We used the payer perspective with a 1-year time horizon. Model uncertainty was analyzed using a probabilistic sensitivity analysis. Event probabilities, health-state utilities, and costs were obtained from literature review, Healthcare Cost and Utilization Project, and Medicare fee schedules. RESULTS: In the base-case analysis, NOM costs $6530/patient and LA costs $9278/patient on average at 1 y. Quality-adjusted life year (QALY) differences minimally favored NOM compared to LA with 0.997 versus 0.996 QALYs/patient. The incremental cost-effectiveness ratio for NOM over LA was $4,791,149.52/QALY. NOM was dominant in 97.4% of simulations, outperforming in cost and QALYs. A probabilistic sensitivity analysis showed NOM was 99.6% likely to be cost-effective at a willingness-to-pay threshold of $100,000/QALY. CONCLUSIONS: Our model demonstrates that NOM is a dominant strategy to LA over a 1-year horizon. We use recent trial data demonstrating higher rates of early and late NOM failures. However, we also incorporate a shorter length of index hospitalizations with NOM, reflecting a contemporary approach to NOM and ultimately driving cost-effectiveness. Long-term follow-up data are needed in this population to assess the cost-effectiveness of NOM over longer time horizons, where healthcare utilization and recurrence rates may be higher.

Fall-Related Injuries in Malawi: Outcomes and Trends Over Time.

BACKGROUND: Fall-related injury (FRI) is a leading cause of injuries worldwide. Data on injury patterns and trends over time are lacking in resource-limited settings. METHODS: We performed a retrospective analysis of FRI at Kamuzu Central Hospital in Malawi from 2009 to 2021. Outcomes were compared between patients presenting with FRI and those with other injury mechanisms. Bivariate and multivariate regressions were used to determine predictors of presentation following falls and mortality. We also analyzed time trends. RESULTS: A total of 166,047 patients were included, of which 41,695 were patients presenting after falls (25.7%). Most FRI patients were between 5 and 45 (67.2%) and male (66.9%). Most falls occurred at home (67.3%) and resulted in extremity injuries (51.6%). The predicted probability of hospital presentation after falling is highest for children ≤ 5 years and adults > 60 years and decreases over time. On multivariate analysis, patients between 5 and 15 [adjusted odds ratio (AOR) 1.70, 95% confidence interval (CI) 1.63-1.77] and > 60 (AOR 1.14, 95% CI 1.07-1.22) and women (AOR 1.13, 95% CI 1.10-1.16) are more likely to present with FRI. Compared to patients with non-FRI, those with FRI were more likely to have been injured at school (AOR 2.16, 95% CI 2.01-2.32) and during sports and recreation (AOR 4.53, 95% CI 4.24-4.85). CONCLUSION: FRI is the most common injury presentation after motor vehicle injury in this low-resource setting. This study provides essential information about FRI in Malawi over time. Our findings can help inform resource allocation and injury prevention initiatives.

Sex-Based Differences in Survival Among Patients with Acute Abdomen Undergoing Surgery in Malawi: A Propensity Weighted Analysis.

INTRODUCTION: Sex disparities in access to health care in low-resource settings have been demonstrated. Still, there has been little research on the effect of sex on postoperative outcomes. We evaluated the relationship between sex and mortality after emergency abdominal surgery. METHODS: We performed a retrospective cohort study using the acute care surgery database at Kamuzu Central Hospital (KCH) in Malawi. We included patients who underwent emergency abdominal surgery between 2013 and 2021. We created a propensity score weighted Cox proportional hazards model to assess the relationship between sex and inpatient survival. RESULTS: We included 2052 patients in the study, and 76% were males. The most common admission diagnosis in both groups was bowel obstruction. Females had a higher admission shock index than males (0.91 vs. 0.81, p < 0.001) and a longer delay from admission until surgery (1.47 vs. 0.79 days, p < 0.001). Females and males had similar crude postoperative mortality (16.3% vs. 15.3%, p = 0.621). The final Cox proportional hazards regression model was based on the propensity-weighted cohort. The mortality hazard ratio was 0.65 among females compared to males (95% CI 0.46-0.92, p = 0.014). CONCLUSIONS: Our results show a survival advantage among female patients undergoing emergency abdominal surgery despite sex-based disparities in access to surgical care that favors males. Further research is needed to understand the mechanisms underlying these findings.

Malawi Trauma Score is Predictive of Mortality at a District Hospital: A Validation Study.

BACKGROUND: Trauma scoring systems can identify patients who should be transferred to referral hospitals, but their utility in LMICs is often limited. The Malawi Trauma Score (MTS) reliably predicts mortality at referral hospitals but has not been studied at district hospitals. We sought to validate the MTS at a Malawi district hospital and evaluate whether MTS is predictive of transfer to a referral hospital. METHODS: We performed a retrospective study using trauma registry data from Salima District Hospital (SDH) from 2017 to 2021. We excluded patients brought in dead, discharged from the Casualty Department, or missing data needed to calculate MTS. We used logistic regression modeling to study the relationship between MTS and mortality at SDH and between MTS and transfer to a referral hospital. We used receiver operating characteristic analysis to validate the MTS as a predictor of mortality. RESULTS: We included 2196 patients (84.3% discharged, 12.7% transferred, 3.0% died). These groups had similar ages, sex, and admission vitals. Mean (SD) MTS was 7.9(3.0) among discharged patients, 8.4(3.9) among transferred patients, and 14.2(8.0) among patients who died (p < 0.001). Higher MTS was associated with increased odds of mortality at SDH (OR 1.21, 95% CI 1.14-1.29, p < 0.001) but was not related to transfer. ROC area for mortality was 0.73 (95% CI 0.65-0.80). CONCLUSIONS: MTS is predictive of district hospital mortality but not inter-facility transfer. We suggest that MTS be used to identify patients with severe trauma who are most likely to benefit from transfer to a referral hospital.

Tri-modal Distribution of Trauma Deaths in a Resource-Limited Setting: Perception Versus Reality.

BACKGROUND: Advances in trauma care in high-income countries have significantly reduced late deaths following trauma, challenging the classical trimodal pattern of trauma-associated mortality. While studies from low and middle-income countries have demonstrated that the trimodal pattern is still occurring in many regions, there is a lack of data from sub-Saharan Africa evaluating the temporal epidemiology of trauma deaths. METHODS: We conducted a retrospective analysis of the trauma registry at Kamuzu Central Hospital in Lilongwe, Malawi, including all injured patients presenting to the emergency department (ED) from 2009 to 2021. Patients were compared based on timing of death relative to time of injury. We then used a modified Poisson regression model to identify adjusted predictors for early mortality compared to late mortality. RESULTS: Crude mortality of patients presenting to the ED in the study period was 2.4% (n = 4,096/165,324). Most patients experienced a pre-hospital death (n = 2,330, 56.9%), followed by death in the ED (n = 619, 15.1%). Early death (pre-hospital or ED) was associated with transportation by police (RR1.52, 95% CI 1.38, 1.68) or private vehicle (RR1.20, 95% CI 1.07, 1.31), vehicle-related trauma (RR1.10, 95% CI 1.05, 1.14), and penetrating injury (RR1.11, 95% CI 1.04, 1.19). Ambulance transportation was associated with a 40% decrease in the risk of early death. CONCLUSIONS: At a busy tertiary trauma center in Malawi, most trauma-associated deaths occur within 48 h of injury, with most in the pre-hospital setting. To improve clinical outcomes for trauma patients in this environment, substantial investment in pre-hospital care is required through first-responder training and EMS infrastructure.

Arrhythmias in Critically Ill Surgical and Non-surgical Patients: A National Propensity-Matched Study.

BACKGROUND: Arrhythmias are common in critically ill patients, though the impact of arrhythmias on surgical patients is not well delineated. We aimed to characterize mortality following arrhythmias in critically ill patients. METHODS: We performed a propensity-matched retrospective analysis of intensive care unit (ICU) patients from 2007 to 2017 in the Cerner Acute Physiology and Chronic Health Evaluation database. We compared outcomes between patients with and without arrhythmias and those with and without surgical indications for ICU admission. We also modeled predictors of arrhythmias in surgical patients. RESULTS: 467,951 patients were included; 97,958 (20.9%) were surgical patients. Arrhythmias occurred in 1.4% of the study cohorts. Predictors of arrhythmias in surgical patients included a history of cardiovascular disease (odds ratio [OR] 1.35, 95% confidence interval [CI95] 1.11-1.63), respiratory failure (OR 1.48, CI95 1.12-1.96), pneumonia (OR 3.17, CI95 1.98-5.10), higher bicarbonate level (OR 1.03, CI95 1.01-1.05), lower albumin level (OR 0.79, CI95 0.68-0.91), and vasopressor requirement (OR 27.2, CI95 22.0-33.7). After propensity matching, surgical patients with arrhythmias had a 42% mortality risk reduction compared to non-surgical patients (risk ratio [RR] 0.58, CI 95 0.43-0.79). Predicted probabilities of mortality for surgical patients were lower at all ages. CONCLUSIONS: Surgical patients with arrhythmias are at lower risk of mortality than non-surgical patients. In this propensity-matched analysis, predictors of arrhythmias in critically ill surgical patients included a history of cardiovascular disease, respiratory complications, increased bicarbonate levels, decreased albumin levels, and vasopressor requirement. These findings highlight the differential effect of arrhythmias on different cohorts of critically ill populations.

The Effect of Angioembolization Versus Open Exploration for Moderate to Severe Blunt Liver Injuries on Mortality.

INTRODUCTION: Blunt liver injury is common and is associated with a high morbidity and mortality. More severe injuries often require either angioembolization or open operative repair, depending on patient factors and facility capacity. We sought to describe patient outcomes based on intervention type. METHODS: We analyzed the National Trauma Data Bank (2017-2019) using ICD-10 codes to identify adult patients with blunt liver injury and their interventions. AIS (Abbreviated Injury Scale) scores were used to group patients based on liver injury severity (AIS 2-6). Logistic regression modeling was used to estimate the adjusted odds ratio of death based on intervention type, excluding patients with severe injury. RESULTS: Of 2,848,592 trauma patients, 50,250 patients had a blunt liver injury. Among patients with AIS 3/4/5 injury, 1,140 had angioembolization, 1,529 had an open repair, and 188 had both angioembolization and open repair. In comparison with no intervention and adjusted for age, sex, shock index, ISS, and transfusion total (first four hours), angioembolization was associated with a significant decrease in the odds of mortality for patients with an AIS 4 (OR 0.68, 95% CI 0.47, 0.99) and AIS 5 injury (OR 0.39, 95% CI 0.24, 0.64). In patients with an AIS 5 injury, open repair had an increased odds of mortality at OR 1.99 (95% CI 1.47, 2.69). CONCLUSION: In an analysis of a national trauma database, patients with a moderate to severe injury (AIS 4 or 5), angioembolization was associated with a significant reduction in the adjusted odds of mortality compared to open repair and should be considered when clinically appropriate.

The Timing of Operative Intervention for Pediatric Burn Patients in Malawi.

BACKGROUND: Defining the optimal timing of operative intervention for pediatric burn patients in a resource-limited environment is challenging. We sought to characterize the association between mortality and the timing of operative intervention at a burn center in Lilongwe, Malawi. METHODS: This is a retrospective analysis of burn patients (<18 years old) presenting to Kamuzu Central Hospital from 2011 to 2022. We compared patients who underwent excision and/or burn grafting based on the timing of the operation. We used logistic regression modeling to estimate the adjusted odds ratio of death based on the timing of surgery. RESULTS: We included 2502 patients with a median age of 3 years (IQR 1-5) and a male preponderance (56.8%). 411 patients (16.4%) had surgery with a median time to surgery of 18 days (IQR 8-34). The crude mortality rate among all patients was 17.0% and 9.1% among the operative cohort. The odds ratio of mortality for patients undergoing surgery within 3 days from presentation was 5.00 (95% CI 2.19, 11.44) after adjusting for age, sex, % total burn surface area (TBSA), and flame burn. The risk was highest for the youngest patients. CONCLUSIONS: Children who underwent burn excision and/or grafting in the first 3 days of hospitalization had a much higher risk of death than patients undergoing surgical intervention later. Delaying operative intervention till >72 h for pediatric patients, especially those under 5 years old, may confer a survival advantage. More investment is needed in early resuscitation and monitoring for this patient population.

The role of extracorporeal membrane oxygenation in adult kidney transplant patients: A qualitative systematic review of literature.

BACKGROUND: A paucity of evidence exists regarding the risks and benefits of Extracorporeal Membrane Oxygenation (ECMO) in adult kidney transplantation. METHODS: This was a systematic review conducted from Jan 1, 2000 to April 24, 2020 of adult kidney transplant recipients (pre- or post- transplant) and donors who underwent veno-arterial or veno-venous ECMO cannulation. Death and graft function were the primary outcomes, with complications as secondary outcomes. RESULTS: Twenty-three articles were identified that fit inclusion criteria. 461 donors were placed on ECMO, with an overall recipient 12-month mortality rate of 1.3% and a complication rate of 61.5%, the majority of which was delayed graft function. Fourteen recipients were placed on ECMO intraoperatively or postoperatively, with infection as the most common indication for ECMO. The 90-day mortality rate for recipients on ECMO was 42.9%, with multisystem organ failure and infection as the ubiquitous causes of death. 35.7% of patients experienced rejection within 6 months of decannulation, yet all were successfully treated. CONCLUSIONS: ECMO use in adult kidney transplantation is a useful adjunct. Recipient morbidity and mortality from donors placed on ECMO mirrors that of recipients from standard criteria donors. The morbidity and mortality of recipients placed on ECMO are also similar to other patient populations requiring ECMO.

Urbanisation and its associated factors affecting human gut microbiota: where are we heading to?

CONTEXT: The continuous rise in urbanisation and its associated factors has been reflected in the structure of the human gut ecosystem. OBJECTIVE: The main focus of this review is to discuss and summarise the major risk factors associated with urbanisation that affect human gut microbiota thus affecting human health. METHODS: Multiple medical literature databases, namely PubMed, Google, Google Scholar, and Web of Science were used to find relevant materials for urbanisation and its major factors affecting human gut microbiota/microbiome. Both layman and Medical Subject Headings (MeSH) terms were used in the search. Due to the scarcity of the data, no limitation was set on the publication date. Relevant materials in the English language which include case reports, chapters of books, journal articles, online news reports and medical records were included in this review. RESULTS: Based on the data discussed in the review, it is quite clear that urbanisation and its associated factors have long-standing effects on the human gut microbiota that result in alterations of gut microbial diversity and composition. This is a matter of serious concern as chronic inflammatory diseases are on the rise in urbanised societies. CONCLUSION: A better understanding of the factors associated with urbanisation will help us to identify and implement new biological and social approaches to prevent and treat diseases and improve health globally by deepening our understanding of these relationships and increasing studies across urbanisation gradients.HIGHLIGHTSHuman gut microbiota have been linked to almost every important function, including metabolism, intestinal homeostasis, immune system, biosynthesis of vitamins, brain processes, and behaviour.However, dysbiosis i.e., alteration in the composition and diversity of gut microbiota is associated with the pathogenesis of many chronic conditions.In the 21st century, urbanisation represents a major demographic shift in developed and developing countries.During this period of urbanisation, humans have been exposed to many environmental exposures, all of which have led to the dysbiosis of human gut microbiota.The main focus of the review is to discuss and summarise the major risk factors associated with urbanisation and how it affects the diversity and composition of gut microbiota which ultimately affects human health.

Time to Cannulation after ICU Admission Increases Mortality for Patients Requiring Veno-venous ECMO for COVID-19 Associated Acute Respiratory Distress Syndrome.

OBJECTIVE: COVID-19 can cause ARDS that is rapidly progressive, severe, and refractory to conventional therapies. ECMO can be used as a supportive therapy to improve outcomes but evidence-based guidelines have not been defined. SUMMARY BACKGROUND DATA: Initial mortality rates associated with ECMO for ARDS in COVID-19 were high, leading some to believe that there was no role for ECMO in this viral illness. With more experience, outcomes have improved. The ideal candidate, timing of cannulation, and best postcannulation management strategy, however, has not yet been defined. METHODS: We conducted a retrospective review from April 1 to July 31, 2020 of the first 25 patients with COVID-19 associated ARDS placed on V-V ECMO at our institution. We analyzed the differences between survivors to hospital discharge and those who died. Modified Poisson regression was used to model adjusted risk factors for mortality. RESULTS: Forty-four patients (11/25) survived to hospital discharge. Survivors were significantly younger (40.5 years vs 53.1 years; P < 0.001) with no differences between cohorts in mean body mass index, diabetes, or PaO2:-FiO2 at cannulation. Survivors had shorter duration from symptom onset to cannulation (12.5 days vs 19.9 days, P = 0.028) and shorter duration of intensive care unit (ICU) length of stay before cannulation (5.6 days vs 11.7 days, P = 0.045). Each day from ICU admission to cannulation increased the adjusted risk of death by 4% and each year increase in age increased the adjusted risk 6%. CONCLUSIONS: ECMO has a role in severe, refractory ARDS associated with COVID-19. Increasing age and time from ICU admission were risk factors for mortality and should be considered in patient selection. Further studies are needed to define best practices for V-V ECMO use in COVID-19.

The Impact of General Surgeons on Pediatric Surgical Practice in North Carolina: The Reality of Pediatric Surgical Care Delivery.

OBJECTIVE: The aim of this study was to define the training background of the actual surgical workforce providing care to pediatric patients in North Carolina (NC). BACKGROUND: Due to database limitations, pediatric surgical workforce studies have not included general surgeons (GS) who operate on children. Defining the role of GS in care delivery affects policy for clinical care and general and pediatric surgical training. METHODS: We performed a retrospective review of the NC Hospital Discharge Database (2011-2017), including pediatric patients (<18 years) undergoing the most frequent general surgery procedures. Descriptive and correlational analysis over surgical provider [Pediatric Surgeon (PS), GS], and other specialties (OSS), was performed using logistic regression modeling to identify factors associated with surgery by a PS. RESULTS: Of the 57,265 discharges analyzed, pediatric, general, and other specialty surgeons operated on 25,514 (44.6%), 18,581 (32.5%), and 9049 (15.8%), respectively. In a logistic regression model, PS had lower odds of operating on older patients [odds ratio (OR) 0.9, 95% confidence interval (CI) 0.90-0.91]. However, PS were more likely to operate on female patients (OR 1.58, 95% CI 1.53-1.65), Black (OR 1.49, 95% CI 1.43-1.56), and other minority patients (OR 1.23, 95% CI 1.17-1.29) when compared to white patients. PS were also more likely to operate on patients with private insurance (OR 1.38, 95% CI 1.33-1.43) compared to government insurance, and patients undergoing emergency surgery (OR 1.44, 95% CI 1.38-1.50). CONCLUSION: In NC, general surgeons performed a third of the operations on children. After controlling for covariates, pediatric surgeons in NC are more likely to operate on minority and emergency surgery patients, and this is the first study to describe this important practice pattern.

Professionalism of Admitting and Consulting Services and Trauma Patient Outcomes.

OBJECTIVE: To determine whether trauma patients managed by an admitting or consulting service with a high proportion of physicians exhibiting patterns of unprofessional behaviors are at greater risk of complications or death. SUMMARY BACKGROUND DATA: Trauma care requires high-functioning interdisciplinary teams where professionalism, particularly modeling respect and communicating effectively, is essential. METHODS: This retrospective cohort study used data from 9 level I trauma centers that participated in a national trauma registry linked with data from a national database of unsolicited patient complaints. The cohort included trauma patients admitted January 1, 2012 through December 31, 2017. The exposure of interest was care by 1 or more high-risk services, defined as teams with a greater proportion of physicians with high numbers of patient complaints. The study outcome was death or complications within 30 days. RESULTS: Among the 71,046 patients in the cohort, 9553 (13.4%) experienced the primary outcome of complications or death, including 1875 of 16,107 patients (11.6%) with 0 high-risk services, 3788 of 28,085 patients (13.5%) with 1 high-risk service, and 3890 of 26,854 patients (14.5%) with 2+ highrisk services (P < 0.001). In logistic regression models adjusting for relevant patient, injury, and site characteristics, patients who received care from 1 or more high-risk services were at 24.1% (95% confidence interval 17.2% to 31.3%; P < 0.001) greater risk of experiencing the primary study outcome. CONCLUSIONS: Trauma patients who received care from at least 1 service with a high proportion of physicians modeling unprofessional behavior were at an increased risk of death or complications.

Treatment outcomes of esophageal cancer in Eastern Africa: protocol of a multi-center, prospective, observational, open cohort study.

BACKGROUND: Esophageal squamous cell carcinoma (ESCC) is a major cause of cancer morbidity and mortality in Eastern Africa. The majority of patients with ESCC in Eastern Africa present with advanced disease at the time of diagnosis. Several palliative interventions for ESCC are currently in use within the region, including chemotherapy, radiation therapy with and without chemotherapy, and esophageal stenting with self-expandable metallic stents; however, the comparative effectiveness of these interventions in a low resource setting has yet to be examined. METHODS: This prospective, observational, multi-center, open cohort study aims to describe the therapeutic landscape of ESCC in Eastern Africa and investigate the outcomes of different treatment strategies within the region. The 4.5-year study will recruit at a total of six sites in Kenya, Malawi and Tanzania (Ocean Road Cancer Institute and Muhimbili National Hospital in Dar es Salaam, Tanzania; Kilimanjaro Christian Medical Center in Moshi, Tanzania; Tenwek Hospital in Bomet, Kenya; Moi Teaching and Referral Hospital in Eldoret, Kenya; and Kamuzu Central Hospital in Lilongwe, Malawi). Treatment outcomes that will be evaluated include overall survival, quality of life (QOL) and safety. All patients (≥18 years old) who present to participating sites with a histopathologically-confirmed or presumptive clinical diagnosis of ESCC based on endoscopy or barium swallow will be recruited to participate. Key clinical and treatment-related data including standardized QOL metrics will be collected at study enrollment, 1 month following treatment, 3 months following treatment, and thereafter at 3-month intervals until death. Vital status and QOL data will be collected through mobile phone outreach. DISCUSSION: This study will be the first study to prospectively compare ESCC treatment strategies in Eastern Africa, and the first to investigate QOL benefits associated with different treatments in sub-Saharan Africa. Findings from this study will help define optimal management strategies for ESCC in Eastern Africa and other resource-limited settings and will serve as a benchmark for future research. TRIAL REGISTRATION: This study was retrospectively registered with the ClinicalTrials.gov database on December 15, 2021,  NCT05177393 .