Safety and Virologic Impact of Haploidentical NK Cells Plus Interleukin 2 or N-803 in HIV Infection

BACKGROUND

Natural killer (NK) cells are dysfunctional in chronic human immunodeficiency virus (HIV) infection as they are not able to clear virus. We hypothesized that an infusion of NK cells, supported by interleukin 2 (IL-2) or IL-15, could decrease virus-producing cells in the lymphatic tissues.

METHODS

We conducted a phase 1 pilot study in 6 persons with HIV (PWH), where a single infusion of haploidentical related donor NK cells was given plus either IL-2 or N-803 (an IL-15 superagonist).

RESULTS

The approach was well tolerated with no unexpected adverse events. We did not pretreat recipients with cyclophosphamide or fludarabine to "make immunologic space," reasoning that PWH on stable antiretroviral treatment remain T-cell depleted in lymphatic tissues. We found donor cells remained detectable in blood for up to 8 days (similar to what is seen in cancer pretreatment with lymphodepleting chemotherapy) and in the lymph nodes and rectum up to 28 days. There was a moderate decrease in the frequency of viral RNA-positive cells in lymph nodes.

CONCLUSIONS

There was a moderate decrease in HIV-producing cells in lymph nodes. Further studies are warranted to determine the impact of healthy NK cells on HIV reservoirs and if restoring NK-cell function could be part of an HIV cure strategy. Clinical Trials Registration. NCT03346499 and NCT03899480.

Acute Appendicitis Treatment Strategies and Mortality Based on Critical Illness on Admission: An Observational Study

Background: Trials have shown non-inferiority of non-operative management (NOM) for appendicitis, although critically ill patients have been often excluded. The purpose of this study is to evaluate surgical versus NOM outcomes in critically ill patients with appendicitis by measuring mortality and hospital length of stay (LOS). Patients and Methods: The Healthcare Cost and Utilization Project's (HCUP) Database was utilized to analyze data from 10 states between 2008 and 2015. All patients with acute appendicitis by International Classification of Diseases, Ninth Revision (ICD-9) codes over the age of 18 were included. Negative binomial and logistic regression were used to determine the association of acute renal failure (ARF), cardiovascular failure (CVF), pulmonary failure (PF), and sepsis by treatment strategy (laparoscopic, open, both, or no surgery) on mortality and hospital LOS. Results: Among 464,123 patients, 67.5%, 23.3%, 8.2%, and 0.8% underwent laparoscopic, open, NOM, or both laparoscopic and open surgery, respectively. Patients who underwent surgery had 58% lower odds of mortality and 34% shorter hospital LOS compared with NOM patients. Patients with ARF, CVF, PF, and sepsis had 102%, 383%, 475%, and 666% higher odds of mortality and a 47%, 46%, 71%, and 163% longer hospital LOS, respectively, compared with patients without these diagnoses on admission. Conclusions: Critical illness on admission increases mortality and hospital LOS. Patients who underwent laparoscopic, and to a lesser extent, open appendectomy had improved mortality compared with those who did not undergo surgery regardless of critical illness status.

Factors Associated with Mortality in Patients with COVID-19 Receiving Prolonged Ventilatory Support

Background: Since its emergence in early 2020, coronavirus disease 2019 (COVID-19)-associated pneumonia has caused a global strain on intensive care unit (ICU) resources with many intubated patients requiring prolonged ventilatory support. Outcomes for patients with COVID-19 who receive prolonged intubation (>21 days) and possible predictors of mortality in this group are not well established. Patients and Methods: Data were prospectively collected from adult patients with COVID-19 requiring mechanical ventilation from March 2020 through December 2021 across a system of 11 hospitals. The primary end point was in-hospital mortality. Factors associated with mortality were evaluated using univariable and multivariable logistic regression analyses. Results: Six hundred six patients were placed on mechanical ventilation for COVID-19 pneumonia during the study period, with in-hospital mortality of 40.3% (n = 244). Increased age (odds ratio [OR], 1.06; 95% confidence interval [CI], 1.03-1.09), increased creatinine (OR, 1.40; 95% CI, 1.08-1.82), and receiving corticosteroids (OR, 2.68; 95% CI, 1.20-5.98) were associated with mortality. Intubations lasting longer than 21 days (n = 140) had a lower in-hospital mortality of 25.7% (n = 36; p < 0.001). Increasing Elixhauser comorbidity index (OR, 1.12; 95% CI, 1.04-1.19) and receiving corticosteroids (OR, 1.92; 95% CI, 1.06-3.47) were associated with need for prolonged ventilation. In this group, increased age (OR, 1.06; 95% CI, 1.01-1.08) and non-English speaking (OR, 3.74; 95% CI, 1.13-12.3) were associated with mortality. Conclusions: In-hospital mortality in mechanically ventilated patients with COVID-19 pneumonia occurs primarily in the first 21 days after intubation, possibly related to the early active inflammatory process. In patients on prolonged mechanical ventilation, increased age and being non-English speaking were associated with mortality.

Efficacy of Losartan in Hospitalized Patients With COVID-19-Induced Lung Injury: A Randomized Clinical Trial

Importance

SARS-CoV-2 viral entry may disrupt angiotensin II (AII) homeostasis, contributing to COVID-19 induced lung injury. AII type 1 receptor blockade mitigates lung injury in preclinical models, although data in humans with COVID-19 remain mixed.

Objective

To test the efficacy of losartan to reduce lung injury in hospitalized patients with COVID-19.

Design, Setting, and Participants

This blinded, placebo-controlled randomized clinical trial was conducted in 13 hospitals in the United States from April 2020 to February 2021. Hospitalized patients with COVID-19 and a respiratory sequential organ failure assessment score of at least 1 and not already using a renin-angiotensin-aldosterone system (RAAS) inhibitor were eligible for participation. Data were analyzed from April 19 to August 24, 2021.

Interventions

Losartan 50 mg orally twice daily vs equivalent placebo for 10 days or until hospital discharge.

Main Outcomes and Measures

The primary outcome was the imputed arterial partial pressure of oxygen to fraction of inspired oxygen (Pao2:Fio2) ratio at 7 days. Secondary outcomes included ordinal COVID-19 severity; days without supplemental o2, ventilation, or vasopressors; and mortality. Losartan pharmacokinetics and RAAS components (AII, angiotensin-[1-7] and angiotensin-converting enzymes 1 and 2)] were measured in a subgroup of participants.

Results

A total of 205 participants (mean [SD] age, 55.2 [15.7] years; 123 [60.0%] men) were randomized, with 101 participants assigned to losartan and 104 participants assigned to placebo. Compared with placebo, losartan did not significantly affect Pao2:Fio2 ratio at 7 days (difference, -24.8 [95%, -55.6 to 6.1]; P = .12). Compared with placebo, losartan did not improve any secondary clinical outcomes and led to fewer vasopressor-free days than placebo (median [IQR], 9.4 [9.1-9.8] vasopressor-free days vs 8.7 [8.2-9.3] vasopressor-free days).

Conclusions and Relevance

This randomized clinical trial found that initiation of orally administered losartan to hospitalized patients with COVID-19 and acute lung injury did not improve Pao2:Fio2 ratio at 7 days. These data may have implications for ongoing clinical trials.

Trial Registration

ClinicalTrials.gov Identifier: NCT04312009.

Comparison of Outcomes and Process of Care for Patients Treated at Hospitals Dedicated for COVID-19 Care vs Other Hospitals

IMPORTANCE

Early in the SARS-CoV-2 pandemic, the M Health Fairview Hospital System established dedicated hospitals for establishing cohorts and caring for patients with COVID-19, yet the association between treatment at COVID-19-dedicated hospitals and mortality and complications is not known.

OBJECTIVE

To analyze the mortality rate and complications associated with treatment at the COVID-19-dedicated hospitals.

DESIGN, SETTING, AND PARTICIPANTS

This retrospective cohort study evaluated data prospectively collected from March 1, 2020, through June 30, 2021, from 11 hospitals in Minnesota, including 2 hospitals created solely to care for patients with COVID-19. Data obtained included demographic characteristics, treatments, and outcomes of interest for all patients with a confirmed COVID-19 infection admitted to this hospital system during the study period.

EXPOSURES

Patients were grouped based on whether they received treatment from 1 of the 2 COVID-19-dedicated hospitals compared with the remainder of the hospitals within the hospital system.

MAIN OUTCOMES AND MEASURES

Multivariate analyses, including risk-adjusted logistic regression and propensity score matching, were performed to evaluate the primary outcome of in-hospital mortality and secondary outcomes, including complications and use of COVID-specific therapeutics.

RESULTS

There were 5504 patients with COVID-19 admitted during the study period (median age, 62.5 [IQR, 45.0-75.6] years; 2854 women [51.9%]). Of these, 2077 patients (37.7%) (median age, 63.4 [IQR, 50.7-76.1] years; 1080 men [52.0%]) were treated at 1 of the 2 COVID-19-dedicated hospitals compared with 3427 (62.3%; median age, 62.0 [40.0-75.1] years; 1857 women (54.2%) treated at other hospitals. The mortality rate was 11.6% (n = 241) at the dedicated hospitals compared with 8.0% (n = 274) at the other hospitals (P < .001). However, risk-adjusted in-hospital mortality was significantly lower for patients in the COVID-19-dedicated hospitals in both the unmatched group (n = 2077; odds ratio [OR], 0.75; 95% CI, 0.59-0.95) and the propensity score-matched group (n = 1317; OR, 0.78; 95% CI, 0.58-0.99). The rate of overall complications in the propensity score-matched group was significantly lower (OR, 0.81; 95% CI, 0.66-0.99) and the use of COVID-19-specific therapeutics including deep vein thrombosis prophylaxis (83.9% vs 56.9%; P < .001), high-dose corticosteroids (56.1% vs 22.2%; P < .001), remdesivir (61.5% vs 44.5%; P < .001), and tocilizumab (7.9% vs 2.0; P < .001) was significantly higher.

CONCLUSIONS AND RELEVANCE

In this cohort study, COVID-19-dedicated hospitals had multiple benefits, including providing high-volume repetitive treatment and isolating patients with the infection. This experience suggests improved in-hospital mortality for patients treated at dedicated hospitals owing to improved processes of care and supports the use of establishing cohorts for future pandemics.

Translocated microbiome composition determines immunological outcome in treated HIV infection

The impact of the microbiome on HIV disease is widely acknowledged although the mechanisms downstream of fluctuations in microbial composition remain speculative. We detected rapid, dynamic changes in translocated microbial constituents during two years after cART initiation. An unbiased systems biology approach revealed two distinct pathways driven by changes in the abundance ratio of Serratia to other bacterial genera. Increased CD4 T cell numbers over the first year were associated with high Serratia abundance, pro-inflammatory innate cytokines, and metabolites that drive Th17 gene expression signatures and restoration of mucosal integrity. Subsequently, decreased Serratia abundance and downregulation of innate cytokines allowed re-establishment of systemic T cell homeostasis promoting restoration of Th1 and Th2 gene expression signatures. Analyses of three other geographically distinct cohorts of treated HIV infection established a more generalized principle that changes in diversity and composition of translocated microbial species influence systemic inflammation and consequently CD4 T cell recovery.

A multi-center phase II randomized clinical trial of losartan on symptomatic outpatients with COVID-19

BACKGROUND

The SARS-CoV-2 virus enters cells via Angiotensin-converting enzyme 2 (ACE2), disrupting the renin-angiotensin-aldosterone axis, potentially contributing to lung injury. Treatment with angiotensin receptor blockers (ARBs), such as losartan, may mitigate these effects, though induction of ACE2 could increase viral entry, replication, and worsen disease.

METHODS

This study represents a placebo-controlled blinded randomized clinical trial (RCT) to test the efficacy of losartan on outpatients with COVID-19 across three hospital systems with numerous community sites in Minnesota, U.S. Participants included symptomatic outpatients with COVID-19 not already taking ACE-inhibitors or ARBs, enrolled within 7 days of symptom onset. Patients were randomized to 1:1 losartan (25 mg orally twice daily unless estimated glomerular filtration rate, eGFR, was reduced, when dosing was reduced to once daily) versus placebo for 10 days, and all patients and outcome assesors were blinded. The primary outcome was all-cause hospitalization within 15 days. Secondary outcomes included functional status, dyspnea, temperature, and viral load. (clinicatrials.gov, NCT04311177, closed to new participants).

FINDINGS

From April to November 2020, 117 participants were randomized 58 to losartan and 59 to placebo, and all were analyzed under intent to treat principles. The primary outcome did not differ significantly between the two arms based on Barnard's test [losartan arm: 3 events (5.2% 95% CI 1.1, 14.4%) versus placebo arm: 1 event (1.7%; 95% CI 0.0, 9.1%)]; proportion difference -3.5% (95% CI -13.2, 4.8%); p = 0.32]. Viral loads were not statistically different between treatment groups at any time point. Adverse events per 10 patient days did not differ signifcantly [0.33 (95% CI 0.22-0.49) for losartan vs. 0.37 (95% CI 0.25-0.55) for placebo]. Due to a lower than expected hospitalization rate and low likelihood of a clinically important treatment effect, the trial was terminated early.

INTERPRETATION

In this multicenter blinded RCT for outpatients with mild symptomatic COVID-19 disease, losartan did not reduce hospitalizations, though assessment was limited by low event rate. Importantly, viral load was not statistically affected by treatment. This study does not support initiation of losartan for low-risk outpatients.

Morbidity and Mortality Trends of Pancreatitis: An Observational Study

Background: Pancreatitis accounts for more than $2.5 billion of healthcare costs and remains the most common gastrointestinal (GI) admission. Few contemporary studies have assessed temporal trends of incidence, complications, management, and outcomes for acute pancreatitis in hospitalized patients at the national level. Methods: We used data from one of the largest hospital-based databases available in the United States, the Healthcare Cost and Utilization Project's (HCUP) State Inpatient Database, from 10 states between 2008 and 2015. We included patients with a diagnosis of acute pancreatitis (ICD-9 CM 577.0). Patient- and hospital-level data were used to estimate incidence and inpatient mortality rates. Results: From 80,736,256 hospitalizations, 929,914 (1.15%) cases of acute pancreatitis were identified, 186,226 (20.2%) of which were caused by gallbladder disease). The median age was 53 years (interquartile range [IQR], 41-67) and 50.8% were men. In-hospital mortality was 2.5% and crude mortality rates declined from 2.9% to 2.0% over the study period. Admission year remained significant after adjusting for patient demographics and comorbidities (odds ratio [OR], 0.90; 95% confidence interval [CI], 0.89-0.90; p < 0.001). Gallbladder disease was associated with decreased odds of mortality (OR, 0.60; 95% CI, 0.57-0.62). Median length of stay was four days (IQR, 2-7) and decreased over time. The rates of surgical and endoscopic interventions were highest in 2011 (peak incidence of 16.1% and 9.5%, respectively) and have been decreasing since. Surgical providers were, on average, more likely than medical providers to perform surgery in both those with and without gallbladder disease etiology (gallbladder disease OR, 7.11; 95% CI, 5.46-9.25; non-gallbladder disease OR, 20.50; 95% CI, 16.81-25.01), endoscopy (gallbladder disease OR, 1.22; 95% CI, 0.87-1.72; non-gallbladder disease OR, 1.60; 95% CI, 1.18-2.16), or both (gallbladder disease OR, 7.00; 95% CI, 5.22-9.37; non-gallbladder disease OR, 8.85; 95% CI, 5.61-13.96). Conclusions: The incidence of pancreatitis, from 2008 to 2015, has increased whereas inpatient mortality (i.e., case fatality) has decreased. Understanding temporal trends in outcomes and management along with provider, hospital, and regional variation can better identify areas for future research and collaboration in managing these patients.

Discordant Cardiopulmonary Resuscitation and Code Status at Death

CONTEXT

One fundamental way to honor patient autonomy is to establish and enact their wishes for end-of-life care. Limited research exists regarding adherence with code status.

OBJECTIVES

This study aimed to characterize cardiopulmonary resuscitation (CPR) attempts discordant with documented code status at the time of death in the U.S. and to elucidate potential contributing factors.

METHODS

The Cerner Acute Physiology and Chronic Health Evaluation (APACHE) outcomes database, which includes 237 U.S. hospitals that collect manually abstracted data from all critical care patients, was queried for adults admitted to intensive care units with a documented code status at the time of death from January 2008 to December 2016. The primary outcome was discordant CPR at death. Multivariable logistic regression models were used to identify patient-level and hospital-level associated factors after adjustment for age, hospital, and illness severity (APACHE III score).

RESULTS

A total of 21,537 patients from 56 hospitals were included. Of patients with a do-not-resuscitate code status, 149 (0.8%) received CPR at death, and associated factors included black race, higher APACHE III score, or treatment in small or nonteaching hospitals. Of patients with a full code status, 203 (9.0%) did not receive CPR at death, and associated factors included higher APACHE III score, primary neurologic or trauma diagnosis, or admission in a more recent year.

CONCLUSION

At the time of death, 1.6% of patients received or did not undergo CPR in a manner discordant with their documented code statuses. Race and institutional factors were associated with discordant resuscitation, and addressing these disparities may promote concordant end-of-life care in all patients.

Characterizing COVID-19 clinical phenotypes and associated comorbidities and complication profiles

PURPOSE

Heterogeneity has been observed in outcomes of hospitalized patients with coronavirus disease 2019 (COVID-19). Identification of clinical phenotypes may facilitate tailored therapy and improve outcomes. The purpose of this study is to identify specific clinical phenotypes across COVID-19 patients and compare admission characteristics and outcomes.

METHODS

This is a retrospective analysis of COVID-19 patients from March 7, 2020 to August 25, 2020 at 14 U.S. hospitals. Ensemble clustering was performed on 33 variables collected within 72 hours of admission. Principal component analysis was performed to visualize variable contributions to clustering. Multinomial regression models were fit to compare patient comorbidities across phenotypes. Multivariable models were fit to estimate associations between phenotype and in-hospital complications and clinical outcomes.

RESULTS

The database included 1,022 hospitalized patients with COVID-19. Three clinical phenotypes were identified (I, II, III), with 236 [23.1%] patients in phenotype I, 613 [60%] patients in phenotype II, and 173 [16.9%] patients in phenotype III. Patients with respiratory comorbidities were most commonly phenotype III (p = 0.002), while patients with hematologic, renal, and cardiac (all p<0.001) comorbidities were most commonly phenotype I. Adjusted odds of respiratory, renal, hepatic, metabolic (all p<0.001), and hematological (p = 0.02) complications were highest for phenotype I. Phenotypes I and II were associated with 7.30-fold (HR:7.30, 95% CI:(3.11-17.17), p<0.001) and 2.57-fold (HR:2.57, 95% CI:(1.10-6.00), p = 0.03) increases in hazard of death relative to phenotype III.

CONCLUSION

We identified three clinical COVID-19 phenotypes, reflecting patient populations with different comorbidities, complications, and clinical outcomes. Future research is needed to determine the utility of these phenotypes in clinical practice and trial design.

"Who wants me to do what?" varied expectations from key stakeholder groups in the surgical intensive care unit creates a challenging learning environment

BACKGROUND

Surgical intensive care units (SICU) require complex care from a multi-disciplinary team. Frequent changes in team members can lead to shifting expectations for junior general surgical trainees, which creates a challenging working and learning environment. We aim to identify expectations of junior surgery trainee's medical knowledge and technical/non-technical skills at the start of their SICU rotation. We hypothesize that expectations will not be consistent across SICU stakeholder groups.

METHODS

Twenty-eight individual semi-structured interviews were conducted with six SICU stakeholder groups at a medium-sized academic hospital. Expectations were identified from interview transcripts. Frequency counts were analyzed.

RESULTS

Forty-one expectations were identified. 4 expectations were identified by a majority of interviewees. Most expectations were identified by 7 or fewer interviewees. 23 (53%) expectations were shared by at least one stakeholder group. 2 (8%) expectations were shared by all groups.

CONCLUSIONS

SICU stakeholder groups identified ten medical knowledge, ten technical skill, and three non-technical skill expectations. Yet, few expectations were shared among the groups. Thus, SICU stakeholder groups have disparate expectations for surgery trainees in our SICU.

Understanding the renin-angiotensin-aldosterone-SARS-CoV axis: a comprehensive review

Importance

Coronavirus disease 2019 (COVID-19), the disease caused by the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), has been declared a global pandemic with significant morbidity and mortality since first appearing in Wuhan, China, in late 2019. As many countries are grappling with the onset of their epidemics, pharmacotherapeutics remain lacking. The window of opportunity to mitigate downstream morbidity and mortality is narrow but remains open. The renin–angiotensin–aldosterone system (RAAS) is crucial to the homeostasis of both the cardiovascular and respiratory systems. Importantly, SARS-CoV-2 utilises and interrupts this pathway directly, which could be described as the renin–angiotensin–aldosterone–SARS-CoV (RAAS–SCoV) axis. There exists significant controversy and confusion surrounding how anti-hypertensive agents might function along this pathway. This review explores the current state of knowledge regarding the RAAS–SCoV axis (informed by prior studies of SARS-CoV), how this relates to our currently evolving pandemic, and how these insights might guide our next steps in an evidence-based manner.

Observations

This review discusses the role of the RAAS–SCoV axis in acute lung injury and the effects, risks and benefits of pharmacological modification of this axis. There may be an opportunity to leverage the different aspects of RAAS inhibitors to mitigate indirect viral-induced lung injury. Concerns have been raised that such modulation might exacerbate the disease. While relevant preclinical, experimental models to date favour a protective effect of RAAS–SCoV axis inhibition on both lung injury and survival, clinical data related to the role of RAAS modulation in the setting of SARS-CoV-2 remain limited.

Conclusion

Proposed interventions for SARS-CoV-2 predominantly focus on viral microbiology and aim to inhibit viral cellular injury. While these therapies are promising, immediate use may not be feasible, and the time window of their efficacy remains a major unanswered question. An alternative approach is the modulation of the specific downstream pathophysiological effects caused by the virus that lead to morbidity and mortality. We propose a preponderance of evidence that supports clinical equipoise regarding the efficacy of RAAS-based interventions, and the imminent need for a multisite randomised controlled clinical trial to evaluate the inhibition of the RAAS–SCoV axis on acute lung injury in COVID-19.

The interplay of SARS-CoV-2 with the renin–angiotensin–aldosterone system probably accounts for much of its unique pathology. Appreciating the degree and mechanism of this interaction highlights potential therapeutic options, including blockade (ARBs).https://bit.ly/3aue4tS

Concordance Between Expert and Nonexpert Ratings of Condensed Video-Based Trainee Operative Performance Assessment

OBJECTIVE

We examined the impact of video editing and rater expertise in surgical resident evaluation on operative performance ratings of surgical trainees.

DESIGN

Randomized independent review of intraoperative video.

SETTING

Operative video was captured at a single, tertiary hospital in Boston, MA.

PARTICIPANTS

Six common general surgery procedures were video recorded of 6 attending-trainee dyads. Full-length and condensed versions (n = 12 videos) were then reviewed by 13 independent surgeon raters (5 evaluation experts, 8 nonexperts) using a crossed design. Trainee performance was rated using the Operative Performance Rating Scale, System for Improving and Measuring Procedural Learning (SIMPL) Performance scale, the Zwisch scale, and ten Cate scale. These ratings were then standardized before being compared using Bayesian mixed models with raters and videos treated as random effects.

RESULTS

Editing had no effect on the Operative Performance Rating Scale Overall Performance (-0.10, p = 0.30), SIMPL Performance (0.13, p = 0.71), Zwisch (-0.12, p = 0.27), and ten Cate scale (-0.13, p = 0.29). Additionally, rater expertise (evaluation expert vs. nonexpert) had no effect on the same scales (-0.16 (p = 0.32), 0.18 (p = 0.74), 0.25 (p = 0.81), and 0.25 (p = 0.17).

CONCLUSIONS

There is little difference in operative performance assessment scores when raters use condensed videos or when raters who are not experts in surgical resident evaluation are used. Future validation studies of operative performance assessment scales may be facilitated by using nonexpert surgeon raters viewing videos condensed using a standardized protocol.

Undergraduate, Nonmedical Students can Pass the FLS Manual Skills Exam With Minimal Practice

OBJECTIVES

The primary objective of this study is to investigate whether undergraduate, nonmedical students could pass the FLS Manual Skills Exam with minimal practice. The secondary objective is to examine ACGME case log data from graduating chief residents over the past 18 years to examine how laparoscopic experience has evolved over that time period.

DESIGN

Undergraduate, nonmedical students received training and unlimited practice time before being tested on each task of the FLS Manual Skills Exam. Each task was timed and scored using the MISTELS system. ACGME case log data from graduating chief residents over the past 18 years was obtained.

SETTING

The setting is SimPortal, the simulation center associated with the University of Minnesota Medical School.

PARTICIPANTS

The participants are 25 undergraduate, nonmedical students from the University of Minnesota. Participants were recruited on campus.

RESULTS

Twenty-three out of 25 (92%) undergraduate, nonmedical students successfully completed one attempt for each task of the FLS Manual Skills Exam and 21 out of 25 (84%) completed both attempts. The average total practice time was 39 minutes. Over the past 18 years, the average number of laparoscopic cases completed by a graduating chief increased from 142 to 275 cases (93% increase). Additionally, the average number of cases of the top 5 most common laparoscopic operations increased from 25% to over 400%.

CONCLUSIONS

Undergraduate, nonmedical students can pass the FLS Manual Skills Exam with minimal practice. Additionally, general surgery residents and medical students continue to gain more laparoscopic experience throughout medical training as laparoscopic surgery is utilized for more operations. The FLS Manual Skills Exam should be re-examined to determine its utility as a high-stakes exam.

Pre- and Peri-Operative Factors Associated with Chronic Critical Illness in Liver Transplant Recipients

Background: Chronic critical illness (CCI) is a new and increasing entity that accounts for substantial cost despite its low incidence. We hypothesized that patients with end-stage liver failure undergoing liver transplant would be at high risk for developing CCI. With limited liver donors it is essential to understand pre- and peritransplant predictors of CCI. Methods: To accomplish this we performed a retrospective cohort study at a large academic transplant center of all adult liver transplant patients from 2011 to 2017. We defined CCI as the need for mechanical ventilation for seven days or more post-transplant. Recipients who had re-transplantation during their index admission, acute rejection, or who died during transplant surgery were excluded. Logistic regression was performed using the Akaike information criterion (AIC) and the likelihood ratio test. Results: We identified 382 transplant recipients. Forty-five (11.8%) developed CCI. Univariable analysis identified 16 pre-transplant factors associated with post-transplant CCI. Subsequent multivariable logistic regression identified eight independent factors associated with CCI in liver transplant recipients including previous liver transplant, acute renal failure, frailty, lower albumin level, higher international normalized ratio, need for mechanical ventilation, and higher systolic pulmonary artery pressure. Pre-transplant factors associated with protection against CCI included higher Model for End-Stage Liver Disease (MELD) score. Conclusion: The incidence of CCI post-liver transplant is similar to the general population admitted to the intensive care unit. Pre-transplant factors associated with CCI can help identify at-risk patients, and furthermore, promote further research and interventions with the goal to decrease the incidence of CCI in the liver transplant recipients.

Impact of Integrase Inhibition Compared With Nonnucleoside Inhibition on HIV Reservoirs in Lymphoid Tissues

BACKGROUND

HIV is produced in lymphoid tissues (LT) and stored on the follicular dendritic cell network in LT. When antiretroviral therapy is started, plasma viremia decays in 2 phases; the first within days of starting therapy and the second over weeks. Raltegravir (RAL), an integrase inhibitor, has been associated with only a single rapid phase of decay, and we speculated this may be due to higher intracellular concentration (IC) of RAL in LT. We have previously measured suboptimal ICs of antiretroviral therapy agents in LT, which were associated with slower decay of both vRNA+ cells and the follicular dendritic cell network pool.

SETTING

Outpatient clinic at the Joint Clinical Research Center in Kampala, Uganda.

METHODS

We compared the rate of decay in LT in people starting RAL with those starting efavirenz (EFV).

RESULTS

There was no difference in the rate of virus decay in LT. The ratio of the ICs of RAL and EFV in lymph node to the concentration of drug that inhibits 95% of virus in blood was 1 log lower in lymph node for EFV and >3 logs lower for RAL.

CONCLUSION

These data further highlight the challenges of drug delivery to LT in HIV infection and demonstrate that RAL is not superior to EFV as judged by direct measurements of the source of virus in LT.

Surgical need among the ageing population of Uganda

BACKGROUND

Uganda's ageing population (age 50 years and older) will nearly double from 2015 to 2050. HIV/AIDS, diabetes, stroke among other disease processes have been studied in the elderly population. However, the burden of disease from surgically-treatable conditions is unknown.

OBJECTIVES

To determine the proportion of adults above 50 years with unmet surgical need and deaths attributable to probable surgically-treatable conditions.

METHODS

A cluster randomized sample representing the national population of Uganda was enumerated. The previously validated Surgeons Overseas assessment of surgical need instrument, a head-to-toe verbal interview, was used to determine any surgically-treatable conditions in two randomly-selected living household members. Deaths were detailed by heads of households. Weighted metrics are calculated taking sampling design into consideration and Taylor series linearization was used for sampling error estimation.

RESULTS

The study enumerated 425 individuals above age 50 years. The prevalence proportion of unmet surgical need was 27.8% (95%CI, 22.1-34.3). This extrapolates to 694,722 (95%CI, 552,279-857,157) individuals living with one or more surgically treatable conditions. The North sub-region was observed to have the highest prevalence proportion. Nearly two out of five household deaths (37.9%) were attributed to probable surgically treatable causes.

CONCLUSION

There is disproportionately high need for surgical care among the ageing population of Uganda with approximately 700,000 consultations needed.

Medical Student Perceptions of 24-Hour Call

OBJECTIVE

To assess the medical student perception and experience of a 24-hour call requirement, and to learn if improvements can be made to improve the 24-hour call requirement.

DESIGN

Medical students completing their required surgical clerkship over 1 academic year at our institution were surveyed prior to their clerkship and on the last week of clerkship regarding their perceptions and experience with 24-hour call.

SETTING

This study was performed at the University of Minnesota, in Minneapolis, Minnesota, a medical school and tertiary medical center.

PARTICIPANTS

Two hundred one medical students were given the option to complete an anonymous survey before and after their required surgical clerkship.

RESULTS

Response rate for the preclerkship survey was 70% (n = 140) and 58% (n = 117) for the postclerkship survey. The mean age of respondents was 26 years, and the majority of students were in their third year of medical school. After completing the clerkship, students interested in surgery more often agreed the 24-hour call requirement should remain (51% versus 31%, p = 0.01). Students rotating at a Level I Trauma Center were also more likely to agree the call requirement should remain (59% versus 33%, p = 0.008). Medical students generally had less concerns (mental health, fatigue, mistakes, and grade performance) related to 24-hour call after completion of the clerkship. Concerns about the effect of 24-hour call on study schedule remained high in both pre and postclerkship groups.

CONCLUSIONS

Medical students have concerns about the experience prior to the clerkship that diminished by its completion. To improve medical student perceptions and overall experience of 24-hour call, frequency of shifts could be limited and the 24-hour call requirement sites could be shifted to Level I Trauma Centers.

Creating a Rural Surgery Track and a Review of Rural Surgery Training Programs

OBJECTIVE

The objective of this study was to present the process of developing a rural surgery training track within an established residency program and review the current rural surgery training programs in the nation.

DESIGN

This study reviews current rural surgery training opportunities at Accreditation Council for Graduate Medical Education accredited surgical residencies in the United States and presents the process of creating the University of Minnesota's rural surgery training track.

SETTING

This study was performed at the University of Minnesota, in Minneapolis, Minnesota, and at Essentia Health-Saint Mary's Medical Center, in Duluth, Minnesota.

PARTICIPANTS

Accredited general surgery residencies were reviewed. The creation of a designated rural surgery training track added an additional rural-designated surgical resident during each postgraduation year and created a required postgraduation year 2 rural surgery rotation for all categorical surgical residents.

RESULTS

Two hundred sixty-eight surgery residency programs were reviewed. Twenty-seven had required rural rotations, 10 offered only elective rural rotations, and 4 had dedicated National Resident Matching Program codes for rural training tracks. After review of national rural surgery training opportunities, the University of Minnesota's process of creating a designated rural surgery training program required attention to 5 main components: needs assessment and review of local opportunities, surgery residency review committee approval, funding, surgical education, and clinical/operative education.

CONCLUSIONS

Increasing opportunities for surgical residents to train in rural settings may help with recruitment of medical students and retention of surgeons pursuing careers in rural surgery.

Communication Deficits Among Surgical Residents During Difficult Patient Family Conversations

OBJECTIVES

To qualitatively analyze videotaped data of surgical residents and fellows interacting with standardized patients to identify communication weaknesses. To correlate our qualitative data with their quantitative scores.

DESIGN

We used discourse analysis to identify negative communication patterns among 10 surgical residents and fellows who were tested on interpersonal competencies during an objective structured clinical examination in 2014. We then correlated our findings with the validated evaluation outcomes. Descriptive statistics were then used to quantify our findings.

SETTING

The setting was an objective structured clinical examination performed in 2014 using standardized patient surrogate family members.

PARTICIPANTS

The participants were a mix of first and third year surgical residents and critical care fellows.

RESULTS

The item that most strongly differentiated the bottom 5 from the top 5 performers was not answering the patient appropriately. This was exhibited in 3 ways among the lowest performers in our study: (1) paternalism, (2) vagueness, and (3) dehumanization. Our statistical analyses showed that the overall number of negative communication behaviors correlated with negative staff scores (r = -0.653, p < 0.05). Dehumanization and paternalism were the 2 behaviors most strongly correlated with negative staff scores (r = 0.796 and 0.781 respectively, p < 0.01).

CONCLUSIONS

We found the lowest performers responded inappropriately to the patient, which we further delineated into vagueness, paternalism, and dehumanization. We propose positive communication strategies be taught to residents to improve how they are perceived by patients.

Impostor Phenomenon and Burnout in General Surgeons and General Surgery Residents

OBJECTIVE

Impostor phenomenon (IP) characterizes feelings of self-doubt coupled with feelings that achievements were based on luck and a fear of being discovered as an intellectual fraud. Recently, studies have focused on IP in medical trainees and its association with burnout; however, this research has not yet been conducted on surgeons. This study addresses that gap by investigating the prevalence of IP and burnout in general surgeons and surgery residents.

DESIGN

Participants completed two unlinked, blinded surveys. The first survey included demographics and scholarly activity, while the second included the Clance Impostor Phenomenon Scale (CIPS) and a validated, single-item burnout score.

SETTING

Hennepin County Medical Center and University of Minnesota, Minneapolis, MN.

PARTICIPANTS

General surgeons and general surgery residents at two teaching hospitals, one community-based (N = 46) and one university-based (N = 42).

RESULTS

The majority of both surgeons and residents were male, Caucasian, and married. Residents scored significantly higher compared to faculty in nearly half of CIPS questions. The overall CIPS score was significantly higher in trainees as well (61 vs 51, p = 0.017). Burnout did not differ significantly between trainees (30%) and faculty (41%) (p = 0.545). We found no significant differences in gender or years of practice in those with clinical IP (CIPS >62), and logistic regression analysis showed burnout as the only significant association for clinical IP symptoms (OR 3.95, p = 0.017).

CONCLUSIONS

Contrary to studies in other medical fields, female general surgery faculty and trainees were no more likely than males to display characteristics of IP. Residents did; however, score higher than faculty on overall CIPS score. While we cannot determine how burnout and IP directly impact each other, our study shows that both faculty and trainees experiencing burnout are more likely to report symptoms of IP.

Identifying Priorities for Faculty Development in General Surgery Using the Delphi Consensus Method

OBJECTIVE

Faculty teaching skills are critical for effective surgical education, however, which skills are most important to be taught in a faculty development program have not been well defined. The objective of this study was to identify priorities for faculty development as perceived by surgical educators.

DESIGN

We used a modified Delphi methodology to assess faculty perceptions of the value of faculty development activities, best learning modalities, as well as barriers and priorities for faculty development. An expert panel developed the initial survey and distributed it to the membership of the Association of Program Directors in Surgery. Responses were reviewed by the expert panel and condensed to 3 key questions that were redistributed to the survey participants for final ranking.

PARTICIPANTS

Seven experts reviewed responses to 8 questions by 110 participants. 35 participants determined the final ranking responses to 3 key questions.

RESULTS

The top three priorities for faculty development were: 1) Resident assessment/evaluation and feedback 2) Coaching for faculty teaching, and 3) Improving intraoperative teaching skills. The top 3 learning modalities were: 1) Coaching 2) Interactive small group sessions, and 3) Video-based education. Barriers to implementing faculty development included time limitations, clinical workload, faculty interest, and financial support.

CONCLUSIONS

Faculty development programs should focus on resident assessment methods, intraoperative and general faculty teaching skills using a combination of coaching, small group didactic and video-based education. Concerted efforts to recognize and financially reward the value of teaching and faculty development is required to support these endeavors and improve the learning environment for both residents and faculty.

Supplementing Resident Research Funding Through a Partnership With Local Industry

OBJECTIVE

To develop a model for the supplementation of resident research funding through a resident-hosted clinical immersion with local industry.

DESIGN

Designated research residents hosted multiple groups of engineers and business professionals from local industry in general surgery-focused clinical immersion weeks. The participants in these week-long programs are educated about general surgery and brought to the operating room to observe a variety of surgeries.

SETTING

This study was performed at the University of Minnesota, in Minneapolis, Minnesota, at a tertiary medical center.

PARTICIPANTS

Ten designated research residents hosted general surgery immersion programs. Fifty-seven engineers and business professionals from 5 different local biomedical firms have participated in this program.

RESULTS

General surgery research residents (in collaboration with the University of Minnesota's Institute for Engineering in Medicine) have hosted 9 clinical immersion programs since starting the collaborative in 2015. Immersion participant response to the experiences was very positive. Two full-time resident research positions can be funded annually through participation in this program.

CONCLUSIONS

With decreasing funding available for surgical research, particularly resident research, innovative ways to fund resident research are needed. The general surgery clinical immersion program at the University of Minnesota has proven its value as a supplement for resident research funding and may be a sustainable model for the future.

Lymphoid tissue fibrosis is associated with impaired vaccine responses

Vaccine responses vary by geographic location. We have previously described how HIV-associated inflammation leads to fibrosis of secondary lymph nodes (LNs) and T cell depletion. We hypothesized that other infections may cause LN inflammation and fibrosis, in a process similar to that seen in HIV infection, which may lead to T cell depletion and affect vaccine responses. We studied LNs of individuals from Kampala, Uganda, before and after yellow fever vaccination (YFV) and found fibrosis in LNs that was similar to that seen in HIV infection. We found blunted antibody responses to YFV that correlated to the amount of LN fibrosis and loss of T cells, including T follicular helper cells. These data suggest that LN fibrosis is not limited to HIV infection and may be associated with impaired immunologic responses to vaccines. This may have an impact on vaccine development, especially for infectious diseases prevalent in the developing world.

Long-Term Functional Outcomes after Traumatic Thoracic and Lumbar Spine Fractures

The incidence of thoracolumbar spine fractures in blunt trauma is 4 to 5 per cent. These fractures may lead to neurologic injury, chronic back pain, and disability. Most studies from United States trauma centers focus on neurologic sequelae and/or compare treatment modalities. However, most patients with spine fractures do not have a neurologic deficit. Our primary objective was to determine the long-term outcome of traumatic thoracolumbar spine fractures, specifically addressing quality of life, chronic pain, and employment using a validated patient outcome survey. A chart review of 138 adult blunt trauma patients who sustained a thoracolumbar spine fracture and were admitted to our Level I trauma center from 2008 to 2013 was performed. A phone interview based on the Short-Form 12®, a general health survey, was then conducted. Of the 134 patients who met the inclusion criteria, 46 (34%) completed the survey. The average Short-Form 12® scores were 51.0 for the physical health component score and 52.9 for the mental health component score. These did not differ significantly from the national norm. Furthermore, 83 per cent (38) of the survey respondents returned to work full-time at the same level as before their injury. Majority of the patients (76%) said they did not have pain two to seven years after injury. Despite a commonly held belief that back injury leads to chronic pain and disability, after sustaining a thoracic or lumbar fracture, patients are generally able to return to work and have a comparable quality of life to the general population. This knowledge may be useful in counseling patients regarding expectations for recovery from trauma.

Long-Term Functional Outcomes after Traumatic Thoracic and Lumbar Spine Fractures

The incidence of thoracolumbar spine fractures in blunt trauma is 4 to 5 per cent. These fractures may lead to neurologic injury, chronic back pain, and disability. Most studies from United States trauma centers focus on neurologic sequelae and/or compare treatment modalities. However, most patients with spine fractures do not have a neurologic deficit. Our primary objective was to determine the long-term outcome of traumatic thoracolumbar spine fractures, specifically addressing quality of life, chronic pain, and employment using a validated patient outcome survey. A chart review of 138 adult blunt trauma patients who sustained a thoracolumbar spine fracture and were admitted to our Level I trauma center from 2008 to 2013 was performed. A phone interview based on the Short-Form 12®, a general health survey, was then conducted. Of the 134 patients who met the inclusion criteria, 46 (34%) completed the survey. The average Short-Form 12® scores were 51.0 for the physical health component score and 52.9 for the mental health component score. These did not differ significantly from the national norm. Furthermore, 83 per cent (38) of the survey respondents returned to work full-time at the same level as before their injury. Majority of the patients (76%) said they did not have pain two to seven years after injury. Despite a commonly held belief that back injury leads to chronic pain and disability, after sustaining a thoracic or lumbar fracture, patients are generally able to return to work and have a comparable quality of life to the general population. This knowledge may be useful in counseling patients regarding expectations for recovery from trauma.

Prevalence of Surgically Untreated Face, Head, and Neck Conditions in Uganda: A Cross-Sectional Nationwide Household Survey

BACKGROUND

The Surgeons OverSeas Assessment of Surgical Need tool (SOSAS) was created to evaluate the burden of surgically treatable conditions in low- and middle-income countries. The goal of our study is to describe the face, head, and neck (FHN) conditions that need surgical care in Uganda, along with barriers to that care and disability from these conditions.

METHODS

A 2-stage cluster randomized SOSAS survey was administered in a cross-sectional manner between August and September 2014. Participants included randomly selected persons in 105 enumeration areas in 74 districts throughout Uganda with 24 households in each cluster. The SOSAS survey collected demographic and clinical data on all respondents. Univariate and multivariate logistic models evaluated associations of demographic characteristics and clinical characteristics of the FHN conditions and outcomes of whether health care was sought or surgical care was received.

RESULTS

Of the 4428 respondents, 331 (7.8%) reported having FHN conditions. The most common types of conditions were injury-related wounds. Of those who reported an FHN condition, 36% reported receiving no surgical care whereas 82.5% reported seeking health care. In the multivariate model, literacy and type of condition were significant predictors of seeking health care whereas village type, literacy, and type of condition remained significant predictors of receiving surgical care.

CONCLUSIONS

Many individuals in Uganda are not receiving surgical care and barriers include costs, rural residency, and literacy. Our study highlights the need for targeted interventions in various parts of Uganda to increase human resources for surgery and expand surgical capacity.

Improving surgical residents' communication in disclosing complications: A qualitative analysis of simulated physician and patient surrogate conversations

BACKGROUND

In this study, we explore surgical resident communication with simulated patient surrogates (SPs), in an Objective Structured Clinical Examination (OSCE).

METHODS

We use discourse analysis (DA), a qualitative approach to analyzing language, to evaluate our residents' interactions with simulated patient surrogates. After identifying problematic communication patterns, we apply communication theory to discuss our findings and provide suggestions for improvement.

RESULTS

Residents consistently use bluntness, defined as delivering the news abruptly and without adequate preface, and evasiveness, defined as avoiding giving the news, to deliver difficult information. In addition, some residents use neutral language when empathetic language is warranted; and some try to direct the response of SPs, who then become defensive. Residents use evasiveness most frequently, followed by bluntness. These delivery methods often result in poor communication.

CONCLUSIONS

We recommend further research in barriers to effective resident communication with patients, as well as future research on the positive effects of good communication on patient perception. Learning these skills will help residents to convey support and empathy to patients, thereby enhancing care.

Geospatial analysis of unmet pediatric surgical need in Uganda

BACKGROUND

In low- and middle-income countries (LMICs), an estimated 85% of children do not have access to surgical care. The objective of the current study was to determine the geographic distribution of surgical conditions among children throughout Uganda.

METHODS

Using the Surgeons OverSeas Assessment of Surgical Need (SOSAS) survey, we enumerated 2176 children in 2315 households throughout Uganda. At the district level, we determined the spatial autocorrelation of surgical need with geographic access to surgical centers variable.

FINDINGS

The highest average distance to a surgical center was found in the northern region at 14.97km (95% CI: 11.29km-16.89km). Younger children less than five years old had a higher prevalence of unmet surgical need in all four regions than their older counterparts. The spatial regression model showed that distance to surgical center and care availability were the main spatial predictors of unmet surgical need.

INTERPRETATION

We found differences in unmet surgical need by region and age group of the children, which could serve as priority areas for focused interventions to alleviate the burden. Future studies could be conducted in the northern regions to develop targeted interventions aimed at increasing pediatric surgical care in the areas of most need.

LEVEL OF EVIDENCE

Level III.

What factors influence attending surgeon decisions about resident autonomy in the operating room?

BACKGROUND

Educating residents in the operating room requires balancing patient safety, operating room efficiency demands, and resident learning needs. This study explores 4 factors that influence the amount of autonomy supervising surgeons afford to residents.

METHODS

We evaluated 7,297 operations performed by 487 general surgery residents and evaluated by 424 supervising surgeons from 14 training programs. The primary outcome measure was supervising surgeon autonomy granted to the resident during the operative procedure. Predictor variables included resident performance on that case, supervising surgeon history with granting autonomy, resident training level, and case difficulty.

RESULTS

Resident performance was the strongest predictor of autonomy granted. Typical autonomy by supervising surgeon was the second most important predictor. Each additional factor led to a smaller but still significant improvement in ability to predict the supervising surgeon's autonomy decision. The 4 factors together accounted for 54% of decision variance (r = 0.74).

CONCLUSION

Residents' operative performance in each case was the strongest predictor of how much autonomy was allowed in that case. Typical autonomy granted by the supervising surgeon, the second most important predictor, is unrelated to resident proficiency and warrants efforts to ensure that residents perform each procedure with many different supervisors.

The Feasibility of Real-Time Intraoperative Performance Assessment With SIMPL (System for Improving and Measuring Procedural Learning): Early Experience From a Multi-institutional Trial

PURPOSE

Intraoperative performance assessment of residents is of growing interest to trainees, faculty, and accreditors. Current approaches to collect such assessments are limited by low participation rates and long delays between procedure and evaluation. We deployed an innovative, smartphone-based tool, SIMPL (System for Improving and Measuring Procedural Learning), to make real-time intraoperative performance assessment feasible for every case in which surgical trainees participate, and hypothesized that SIMPL could be feasibly integrated into surgical training programs.

METHODS

Between September 1, 2015 and February 29, 2016, 15 U.S. general surgery residency programs were enrolled in an institutional review board-approved trial. SIMPL was made available after 70% of faculty and residents completed a 1-hour training session. Descriptive and univariate statistics analyzed multiple dimensions of feasibility, including training rates, volume of assessments, response rates/times, and dictation rates. The 20 most active residents and attendings were evaluated in greater detail.

RESULTS

A total of 90% of eligible users (1267/1412) completed training. Further, 13/15 programs began using SIMPL. Totally, 6024 assessments were completed by 254 categorical general surgery residents (n = 3555 assessments) and 259 attendings (n = 2469 assessments), and 3762 unique operations were assessed. There was significant heterogeneity in participation within and between programs. Mean percentage (range) of users who completed ≥1, 5, and 20 assessments were 62% (21%-96%), 34% (5%-75%), and 10% (0%-32%) across all programs, and 96%, 75%, and 32% in the most active program. Overall, response rate was 70%, dictation rate was 24%, and mean response time was 12 hours. Assessments increased from 357 (September 2015) to 1146 (February 2016). The 20 most active residents each received mean 46 assessments by 10 attendings for 20 different procedures.

CONCLUSIONS

SIMPL can be feasibly integrated into surgical training programs to enhance the frequency and timeliness of intraoperative performance assessment. We believe SIMPL could help facilitate a national competency-based surgical training system, although local and systemic challenges still need to be addressed.

Quantifying the pediatric surgical need in Uganda: results of a nationwide cross-sectional, household survey

PURPOSE

Little is known about the prevalence of pediatric surgical conditions in low- and middle-income countries. Many children never seek medical care, thus the true prevalence of surgical conditions in children in Uganda is unknown. The objective of this study was to determine the prevalence of surgical conditions in children in Uganda.

METHODS

Using the Surgeons OverSeas Assessment of Surgical Need (SOSAS) survey, we enumerated 4248 individuals in 2315 households in 105 randomly selected clusters throughout Uganda. Children aged 0-18 were included if randomly selected from the household; for those who could not answer for themselves, parents served as surrogates.

RESULTS

Of 2176 children surveyed, 160 (7.4 %) reported a currently untreated surgical condition. Lifetime prevalence of surgical conditions was 14.0 % (305/2176). The predominant cause of surgical conditions was trauma (48.4 %), followed by wounds (19.7 %), acquired deformities (16.2 %), and burns (12.5 %). Of 90 pediatric household deaths, 31.1 % were associated with a surgically treatable proximate cause of death (28/90 deaths).

CONCLUSION

Although some trauma-related surgical burden among children can be adequately addressed at district hospitals, the need for diagnostics, human resources, and curative services for more severe trauma cases, congenital deformities, and masses outweighs the current capacity of hospitals and trained pediatric surgeons in Uganda.

Surgical Infection Society Curriculum Development Symposium: An Overview

Hospital-acquired infections, sepsis, and critically ill patients cost the healthcare system billions of dollars every year. Many factors contribute to these problems, and the remedies are multifactorial. Education is an important component in resolving many of the issues related to better combating the economic, social, and personal costs associated with surgical infections. The Surgical Infection Society (SIS) convened a symposium to begin a dialogue on how the SIS can facilitate a better understanding of how to educate the surgical infection professionals and trainees. The following report summarizes the presentations and commentary presented at the 2013 Annual Meeting.

Antibiotic Use after Free Tissue Reconstruction of Head and Neck Defects: Short Course vs. Long Course

BACKGROUND

Free tissue reconstruction has become the standard of care for most major defects in the head and neck. Surgical site infection (SSI) can lead to vessel thrombosis and eventual flap loss. The use of antibiotics after free tissue reconstruction has not been studied in the current environment of heightened bacterial antibiotic resistance. We compared the use of short-term and longer-term antibiotics in a series of patients receiving free tissue reconstructions.

METHODS

A retrospective review was performed of 147 patients receiving 149 free flaps who were treated with either short-course (≤2 d; n = 149 [43%]) or long-course (>2 d; n = 85 [57%])) post-operative antibiotics from 2009 to 2014. The outcomes examined were infection, return to the operating room, length of hospital stay, and patient death up to six weeks post-surgery. In addition, risk factors associated with SSI were explored.

RESULTS

Surgical site infection, flap dehiscence, flap loss, and length of stay were not different in the two groups. However, those receiving long-course antibiotics had a significantly higher rate of pneumonia (24.7% vs. 10.9%; p = 0.03), although they had a lower rate of urinary tract infection (0.0% vs 9.4%, respectively; p = 0.01). Body mass index remained a statistically significant risk factor in the multivariable analysis (p = 0.005).

CONCLUSION

Prolonged antibiotic use after free flap reconstruction of head and neck defects does not appear to prevent SSI better than short-course treatment in this population. Moreover, long-course antibiotic use was associated with a higher risk of pneumonia.

Abdominoperineal Resection, Pelvic Exenteration, and Additional Organ Resection Increase the Risk of Surgical Site Infection after Elective Colorectal Surgery: An American College of Surgeons National Surgical Quality Improvement Program Analysis

BACKGROUND

Determining predictors of surgical site infection (SSI) in a large cohort is important for the design of accurate SSI surveillance programs. We hypothesized that additional organ resection and pelvic exenterative procedures are associated independently with a higher risk of SSI.

METHODS

Patients in the American College of Surgeons National Surgical Quality Improvement Program® (ACS NSQIP®; American College of Surgeons, Chicago, IL) database (2005-2012) were identified (n=112,282). Surgical site infection (superficial or deep SSI) at 30 d was the primary outcome. Using primary and secondary CPT® codes (American Medical Association, Chicago, IL) pelvic exenteration was defined and additional organ resection was defined as: bladder resection/repair, hysterectomy, partial vaginectomy, additional segmental colectomy, small bowel, gastric, or diaphragm resection. Univariable analysis of patient and procedure factors identified significant (p<0.05) predictors, which were modeled using stepwise logistic regression.

RESULTS

The rate of SSI was 9.2%. After adjusting for operative duration, predictors of SSI were body mass index (BMI) 25-29.9 (odds ratio [OR]: 1.3), BMI 30-34.9 (OR: 1.59), BMI 35-39.9 (OR: 2.11), BMI>40 (OR: 2.51), pulmonary comorbidities (OR: 1.22), smoking (OR: 1.24), bowel obstruction (OR: 1.40), wound classification 3 or 4 (OR: 1.18), and abdominoperineal resection (OR: 1.58). Laparoscopic or laparoscopically assisted procedures offered a protective effect against incision infection (OR: 0.55). Additional organ resection (OR: 1.08) was also associated independently with SSI, but the magnitude of the effect was decreased after accounting for operative duration. In the analysis that excludes operative duration, pelvic exenteration is associated with SSI (OR: 1.38), but incorporating operative duration into the model results in this variable becoming non-significant.

CONCLUSIONS

In addition to other factors, obesity, surgery for bowel obstruction, abdominoperineal resection, and additional organ resection are independently associated with a higher risk of SSI. Surgical site infection risk in pelvic exenteration and multiple organ resection cases appears to be mediated by prolonged operative duration. In these established high-risk sub-groups of patients, aggressive interventions to prevent SSI should be implemented.

Unanticipated teaching demands rise with simulation training: strategies for managing faculty workload

INTRODUCTION

Using simulation to teach and assess learners represents a powerful approach to training, but one that comes with hidden costs in terms of faculty time, even if programs adopt existing curricula. Some simulators are built to be used independently by learners, but much of the surgical simulation curricula developed for cognitive and psychomotor tasks requires active faculty involvement and low learner-to-faculty teaching ratios to ensure sufficient practice with feedback. The authors hypothesize that the added teaching demands related to simulation have resulted in a significant financial burden to surgery training programs. To date, the effect of simulation-based training on faculty workload has not been estimated objectively and reported in the literature.

METHODS

To test their hypothesis, the authors analyzed data from 2 sources: (1) changes over time (2006-2014) in formal teaching hours and estimated faculty costs at the University of Minnesota, General Surgery Department and (2) a 2014 online survey of general surgery program directors on their use of simulation for teaching and assessment and their perceptions of workload effects.

RESULTS

At the University of Minnesota, the total number of hours spent by department faculty in resident and student simulation events increased from 81 in annual year 2006 to 365 in annual year 2013. Estimated full-time equivalent faculty costs rose by 350% during the same period. Program directors (n = 48) of Association of Program Directors in Surgery reported either a slight (60%) or a significant (33%) increase in faculty workload with the advent of simulation, and moderate difficulty in finding enough instructors to meet this increase. Calling upon leadership for support, using diverse instructor types, and relying on "the dedicated few" represent the most common strategies.

CONCLUSION

To avoid faculty burnout and successfully sustain faculty investment in simulation-based training over time, programs need to be creative in building, sustaining, and managing the instructor workforce.

Inguinal lymph node and anorectal mucosal biopsies for human immunodeficiency virus research protocols in an emerging nation: patient outcomes and lessons learned

BACKGROUND

Lymph nodes and gut-associated lymphatic tissue are important reservoirs of the human immunodeficiency virus (HIV). Little is known about these reservoirs in different geographic populations. We report the surgical outcomes of excisional lymph node and anorectal mucosal biopsies performed internationally and describe the lessons learned.

METHODS

Patients were recruited through the Joint Clinical Research Center (JCRC) in Kampala, Uganda, where procedures were performed. Studies were approved by the Institutional Review Boards of the JCRC and the University of Minnesota. Instruments and supplies were shipped to Uganda and prepared onsite. Drugs and skin preparations were purchased locally. Lymph nodes were removed through 1-3 cm incisions with ligatures on lymphovascular pedicles. Incisions were closed with subcuticular sutures and epidermal tape. Two to four pieces of anorectal mucosa were obtained through anoscopes using biopsy forceps.

RESULTS

One hundred thirty-eight lymph node biopsies and 98 anorectal mucosal biopsies were performed on 71 patients. Forty-one patients were HIV-positive. Many patients had multiple procedures. Two minor complications resulted: One hematoma and one lymphocele. Despite the cost of travel and lodging, cost per biopsy was lower in Uganda compared with the United States.

CONCLUSION

Invasive clinical research can be performed with minimal morbidity in emerging nations with outcomes similar to those found in the United States, but with lower cost.

The association between ASA status and other risk stratification models on postoperative intensive care unit outcomes

BACKGROUND

There is limited medical literature investigating the association between perioperative risk stratification methods and surgical intensive care unit (SICU) outcomes. Our hypothesis contends that routine assessments such as higher ASA physical status classification, surgical risk as defined by American College of Cardiology/American Heart Association guidelines, and simplified Revised Cardiac Index (SRCI) can reliably be associated with SICU outcomes.

METHODS

We performed a chart review of all patients 18 years or older admitted to the SICU between October 1, 2010, and March 1, 2011. We collected demographic and preoperative clinical data: age, sex, ASA physical status class, surgical risk, and SRCI. Outcome data included our primary end point, SICU length of stay, and secondary end points: mechanical ventilation and vasopressor treatment duration, number of acquired organ dysfunctions (NOD), readmission to the intensive care unit (ICU) within 7 days, SICU mortality, and 30-day mortality. Regression analysis and nonparametric tests were used, and P < 0.05 was considered significant.

RESULTS

We screened 239 patients and included 220 patients in the study. The patients' mean age was 58 ± 16 years. There were 32% emergent surgery and 5% readmissions to the SICU within 7 days. The SICU mortality and the 30-day mortality were 3.2%. There was a significant difference between SICU length of stay (2.9 ± 2.1 vs 5.9 ± 7.4, P = 0.007), mechanical ventilation (0.9 ± 2.0 vs 3.4 ± 6.8, P = 0.01), and NOD (0 [0-2] vs 1 [0-5], P < 0.001) based on ASA physical status class (≤ 2 vs ≥ 3). Outcomes significantly associated with ASA physical status class after adjusting for confounders were: SICU length of stay (incidence rate ratio [IRR] = 1.79, 95% confidence interval [CI], 1.35-2.39, P < 0.001), mechanical ventilation (IRR = 2.57, 95% CI, 1.69-3.92, P < 0.001), vasopressor treatment (IRR = 3.57, 95% CI, 1.84-6. 94, P < 0.001), NOD (IRR = 1.71, 95% CI, 1.46-1.99, P < 0.001), and readmission to ICU (odds ratio = 3.39, 95% CI, 1.04-11.09, P = 0.04). We found significant association between surgery risk and NOD (IRR = 1.56, 95% CI, 1.29-1.89, P < 0.001, and adjusted IRR = 1.31, 95% CI, 1.05-1.64, P = 0.02). SRCI was not significantly associated with SICU outcomes.

CONCLUSIONS

Our study revealed that ASA physical status class is associated with increased SICU length of stay, mechanical ventilation, vasopressor treatment duration, NOD, readmission to ICU, and surgery risk is associated with NOD.