Pro-Con Debate: Are Patients With Coronary Stents Suitable for Free-Standing Ambulatory Surgery Centers?

With increasing implantation of coronary artery stents over the past 2 decades, it is inevitable that anesthesiologists practicing in the outpatient setting will need to determine whether these patients are suitable for procedures at a free-standing ambulatory surgery center (ASC). Appropriate selection of patients with coronary artery stents for a procedure in an ASC requires consideration of factors that affect the balance between the risk of stent thrombosis due to interruption of antiplatelet therapy and the thrombogenic effects of surgery, and the risk of perioperative bleeding complications that may occur if antiplatelet therapy is continued. Thus, periprocedure care of these patients presents unique challenges, particularly for extensive surgical procedures that are increasingly scheduled for free-standing ASCs, where consultation and ancillary services, as well as access to percutaneous cardiac interventions, may not be readily available. Therefore, the suitability of the ambulatory setting for this patient population remains highly controversial. In this Pro-Con commentary, we discuss the arguments for and against scheduling patients with coronary artery stents in free-standing ASCs.

Failure to Rescue and Mortality Differences After Appendectomy in a Low-Middle-Income Country and the United States.

BACKGROUND: Major disparities in complications and mortality after appendectomy between countries with different income levels have not been well characterized, as comparative studies at patient level between countries are scant. This study aimed to investigate variations in postoperative complications, mortality, and failure to rescue after appendectomy between a high-income country and a low-to-middle-income country. METHODS: Hospital discharges on adult patients who underwent appendectomy were extracted from administrative databases from Colombia and 2 states of the United States (Florida and New York). Outcomes included major postoperative complications, in-hospital mortality, and failure to rescue. Univariate analyses were conducted to compare outcomes between the 2 countries. Multivariable logistic regression analyses were conducted to examine the independent effect of country on outcomes after adjustment for patient age, sex, comorbidity index, severity of appendicitis, and appendectomy route (laparoscopic/open). RESULTS: A total of 62,338 cases from Colombia and 57,987 from the United States were included in the analysis. Patients in Colombia were significantly younger and healthier but had a higher incidence of peritonitis. Use of laparoscopy was significantly lower in Colombia (5.9% vs 89.4%; P < .0001). After adjustment for covariates, multivariable logistic regression analyses revealed that compared to the United States, Colombia had lower complication rates (2.8% vs 6.6%; odds ratio [OR], 0.41; 95% confidence interval [CI], 0.39-0.44; P < .0001) but higher mortality (0.44% vs 0.08%; OR, 8.92; 95% CI, 5.69-13.98; P < .0001) and failure to rescue (13.6% vs 1.0%; OR, 17.01; 95% CI, 10.66-27.16; P < .0001). CONCLUSIONS: Despite lower rates of postoperative complications, in-hospital mortality after appendectomy was higher in Colombia than in the United States. This difference may be explained by higher rates of failure to rescue in the low-to-middle-income country (ie, decreased ability of Colombian hospitals to rescue patients from complications).

Association between Endometriosis and Surgical Complications among Benign Hysterectomies.

STUDY OBJECTIVE: To investigate the effect of endometriosis on perioperative outcomes in patients undergoing hysterectomy for benign disease. DESIGN: A retrospective cohort study. SETTING: The American College of Surgeons National Surgical Quality Improvement Program database. PATIENTS: A total of 127 556 hysterectomies performed for benign gynecologic indications INTERVENTIONS: Differences in the primary outcomes were compared between patients with and without endometriosis after adjustment for group differences in covariates using inverse probability of treatment weighting approach. MEASURES AND MAIN RESULTS: Of the 127 556 hysterectomies identified, 19 618 (15.4%) had a diagnosis of endometriosis. Patients with endometriosis were younger with a lower prevalence of chronic comorbidities but had higher rates of concurrent pelvic inflammatory disease and previous abdominal operations. The incidence of postoperative complications was higher in patients with endometriosis (9.9% vs 8.1%; odds ratio [OR], 1.25; 95% confidence interval [CI], 1.17-1.34). The incidence of 30-day mortality (0.1% vs 0.03%; OR, 1.98; 95% CI, 0.69-5.65) and reoperations (1.50% vs 1.36%; OR, 1.18; 95% CI, 0.98-1.42) were not different in patients with and without endometriosis. CONCLUSION: Postoperative complications are more likely in hysterectomies involving endometriosis than those without endometriosis, likely owing to anatomic distortion incurring increased surgical complexity. Patients and surgeons should be aware of the increased risk of complications and plan for mitigating these increased risks before and during surgery for suspected endometriosis.

Pro-Con Debate: Are Patients With a Cardiovascular Implantable Electronic Device Suitable to Receive Care in a Free-Standing Ambulatory Surgery Center?

Migration of surgical and other procedures that require anesthesia care from a hospital to a free-standing ambulatory surgery center (ASC) continues to grow. Patients with cardiac implantable electronic devices (CIED) might benefit from receiving their care in a free-standing ASC setting. However, these patients have cardiovascular comorbidities that can elevate the risk of major adverse cardiovascular events. CIEDs are also complex devices and perioperative management varies between devices marketed by various manufacturers and require consultation and ancillary services, which may not be available in a free-standing ASC. Thus, perioperative care of these patients can be challenging. Therefore, the suitability of this patient population in a free-standing ASC remains highly controversial. Although applicable advisories exist, considerable discussion continues with surgeons and other proceduralists about the concerns of anesthesiologists. In this Pro-Con commentary article, we discuss the arguments for and against scheduling a patient with a CIED in a free-standing ASC.

Frailty as a Predictor of Mortality for Fenestrated EVAR and Open Surgical Repair of Aortic Aneurysms Involving Visceral Vessels.

OBJECTIVES: Frailty has been correlated with poor outcomes after major surgery across multiple specialties, but has not been studied in patients undergoing open or endovascular repair of suprarenal and thoracoabdominal aortic aneurysms. Fenestrated endovascular aneurysm repair (FEVAR) has emerged as a lower risk alternative to open surgical repair (OSR) for patients with complex aortic aneurysms involving the visceral artery branches. The objective of the current study was to examine the relationship between frailty and peri-operative outcomes for FEVAR and OSR in patients with suprarenal and thoracoabdominal aortic aneurysms. METHODS: The American College of Surgeons-National Surgical Quality Improvement Program (ACS-NSQIP) database was used to identify patients who underwent FEVAR or OSR for the years 2011 through 2017. Frailty was quantified using a modified 5-factor frailty index (mFI-5) that was previously validated for surgical patients. Frailty was correlated with the primary endpoint of 30-day mortality. Logistic regression was used to identify predictors of 30-day mortality. RESULTS: A total of 675 FEVAR and 1,779 OSR operations were included in the analysis. The 30-day mortality rate was 3.0% for FEVAR and 7.1% for OSR (P = 0.002). Increasing frailty was significantly associated with higher 30-day mortality for both FEVAR (P = 0.018) and OSR (P = 0.0003). Independent predictors of 30-day mortality were frailty score (Odds Ratio [OR] 1.22 [per 0.1-unit increase]; P = 0.0005), type of repair (OSR versus FEVAR, OR 2.46; P = 0.0001), age (OR 1.03; P = 0.0025), female sex (OR 1.61; P = 0.007), Hispanic ethnicity (OR 2.68; P = 0.021), American Society of Anesthesiology [ASA] class (OR 1.57; P = 0.035), preoperative dialysis (OR 3.45; P = 0.032), and history of bleeding disorder (OR 2.60; P < 0.0001). CONCLUSIONS: Frailty, as measured using a mFI-5 score, is an independent predictor of 30-day mortality, overall complications, and length of stay after FEVAR or OSR. Frailty should be used to identify patients at high risk of adverse postoperative outcomes to determine if this risk is modifiable or whether nonoperative is the most appropriate option. FEVAR may offer improved 30-day outcomes, compared to OSR, for the frailest patients.

Outcomes of Sleep Apnea Surgery in Outpatient and Inpatient Settings.

BACKGROUND: Upper airway surgery is an alternative treatment for patients with severe obstructive sleep apnea (OSA). However, there is controversy regarding selection criteria for outpatient versus inpatient settings for these surgical procedures. The aim of this retrospective study was to compare postoperative outcomes of patients undergoing airway surgery in outpatient and inpatient settings based on length of stay at the facility. METHODS: The 2011-2017 American College of Surgeons National Surgical Quality Improvement databases were used to select adult patients with a diagnosis of OSA undergoing elective airway surgery procedures. Single-level (eg, uvulopalatopharyngoplasty [UPPP]) or multilevel surgery (eg, concomitant procedures on base of tongue, maxilla, palate, nose/turbinate, or tracheotomy) was identified using appropriate current procedural terminology (CPT) codes. Surgery setting was classified as outpatient (length of hospital stay = 0 days) or inpatient (length of stay ≥1 day). Propensity scores derived from logistic regression models were used to match inpatient to outpatient cases at a ratio of 1:1. Primary outcome was a composite of 30-day readmissions, reoperations, and/or postoperative complications. Outcomes between the matched groups were compared with McNemar's tests and generalized mixed linear regression analyses. RESULTS: A total of 3208 cases were identified (1049 [32.7%] outpatient and 2159 [67.3%] inpatient). Inpatients were older, had more comorbidities, larger body mass index, and more multilevel procedures. UPPP was performed in about 96% of both inpatients and outpatients. The overall rate of composite of readmission, reoperations, and/or complications in the whole unmatched sample was 6.4% (6.8% and 5.5% in inpatients and outpatients, respectively). The propensity-matching algorithm produced a sample of 987 patients per surgical setting well balanced on available baseline characteristics. The incidence of the composite primary outcome was not significantly different between the groups (6.2% and 5.9% in inpatients and outpatients, respectively; odds ratio [OR] [95% confidence interval {CI}], 1.06 [0.73-1.53]; P = .77). CONCLUSIONS: This retrospective study found that the complications and 30-day readmission rates after airway surgery for OSA are low. There were no significant differences in the composite outcome of 30-day readmissions, reoperations, or complications between inpatient and outpatient settings. Adequately designed prospective studies are necessary to confirm the retrospective observations of this study.

Patient Selection for Adult Ambulatory Surgery: A Narrative Review.

With migration of medically complex patients undergoing more extensive surgical procedures to the ambulatory setting, selecting the appropriate patient is vital. Patient selection can impact patient safety, efficiency, and reportable outcomes at ambulatory surgery centers (ASCs). Identifying suitability for ambulatory surgery is a dynamic process that depends on a complex interplay between the surgical procedure, patient characteristics, and the expected anesthetic technique (eg, sedation/analgesia, local/regional anesthesia, or general anesthesia). In addition, the type of ambulatory setting (ie, short-stay facilities, hospital-based ambulatory center, freestanding ambulatory center, and office-based surgery) and social factors, such as availability of a responsible individual to take care of the patient at home, can also influence patient selection. The purpose of this review is to present current best evidence that would provide guidance to the ambulatory anesthesiologist in making an informed decision regarding patient selection for surgical procedures in freestanding ambulatory facilities.

Intraoperative Airway Management Considerations for Adult Patients Presenting With Tracheostomy: A Narrative Review.

Tracheotomy is a surgical procedure through which a tracheostomy, an opening into the trachea, is created. Indications for tracheostomy include facilitation of airway management during prolonged mechanical ventilation, treatment of acute upper airway obstruction when tracheal intubation is unfeasible, management of chronic upper airway obstructive conditions, and planned airway management for major head and neck surgery. Patients who have a recent or long-term tracheostomy may present for a variety of surgical or diagnostic procedures performed under general anesthesia or sedation/analgesia. Airway management of these patients can be challenging and should be planned ahead of time. Anesthesia personnel should be familiar with the different components of cuffed and uncuffed tracheostomy devices and their connectivity to the anesthesia circuits. An appropriate airway management plan should take into account the indication of the tracheostomy, the maturity status of the stoma, the type and size of tracheostomy tube, the expected patient positioning, and presence of patient's concurrent health conditions. Management of the patient with a T-tube is highlighted. Importantly, there is a need for multidisciplinary care involving anesthesiologists, surgical specialists, and perioperative nurses. The aim of this narrative review is to discuss the anesthesia care of patients with a tracheostomy. Key aspects on relevant tracheal anatomy, tracheostomy tubes/devices, alternatives of airway management, and possible complications related to tracheostomy are summarized with a recommendation for an algorithm to manage intraoperative tracheostomy tube dislodgement.

Global control of COVID-19: good vaccines may not suffice.

The COVID-19 pandemic has unveiled health and socioeconomic inequities around the globe. Effective epidemic control requires the achievement of herd immunity, where susceptible individuals are conferred indirect protection by being surrounded by immunized individuals. The proportion of people that need to be vaccinated to obtain herd immunity is determined through the herd immunity threshold. However, the number of susceptible individuals and the opportunities for contact between infectious and susceptible individuals influence the progress of an epidemic. Thus, in addition to vaccination, control of a pandemic may be difficult or impossible to achieve without other public health measures, including wearing face masks and social distancing. This article discusses the factors that may contribute to herd immunity and control of COVID-19 through the availability of effective vaccines and describes how vaccine effectiveness in the community may be lower than that expected. It also discusses how pandemic control in some countries and populations may face vaccine accessibility barriers if market forces strongly regulate the new technologies available, according to the inverse care law.

La pandemia de COVID-19 ha puesto al descubierto inequidades socioeconómicas y de salud en todo el mundo. Un control epidémico eficaz requiere el logro de la inmunidad colectiva, mediante la cual se confiere a las personas vulnerables una protección indirecta al estar rodeadas de personas inmunizadas. El umbral de inmunidad colectiva determina la proporción de personas que deben vacunarse para llegar a la inmunidad colectiva. Sin embargo, el número de personas vulnerables y las oportunidades de contacto entre las personas infecciosas y las personas vulnerables influyen en el progreso de una epidemia. Por lo tanto, además de la vacunación, el control de una pandemia puede ser difícil o imposible de lograr sin otras medidas de salud pública, como las mascarillas y el distanciamiento social. Este artículo trata sobre los factores que pueden contribuir al logro de la inmunidad colectiva y el control de la COVID-19 mediante la disponibilidad de vacunas efectivas y describe cómo la efectividad de las vacunas en la comunidad puede ser inferior a la prevista. También aborda cómo el control pandémico en algunos países y grupos poblacionales puede enfrentarse a obstáculos que dificultan la accesibilidad de las vacunas si las fuerzas del mercado son el principal factor que regula las nuevas tecnologías disponibles, como se indica en la ley de atención inversa.

A pandemia de COVID-19 revelou iniquidades socioeconômicas e de saúde no mundo todo. Um controle epidêmico eficaz requer a obtenção da imunidade coletiva, em que indivíduos suscetíveis recebem proteção indireta por estarem rodeados de indivíduos imunizados. A proporção de pessoas que precisam ser vacinadas para se alcançar a imunidade coletiva é definida pelo limiar da imunidade coletiva. Porém, o número de indivíduos suscetíveis e as oportunidades de contato entre indivíduos infecciosos e suscetíveis influenciam o progresso de uma epidemia. Portanto, além da vacinação, o controle de uma pandemia pode ser difícil ou impossível de ser alcançado sem outras medidas de saúde pública, incluindo o uso de máscaras e o distanciamento social. Este artigo discute os fatores que podem contribuir para a imunidade coletiva e para o controle da COVID-19 por meio da disponibilidade de vacinas eficazes, e descreve como a eficácia das vacinas na comunidade pode ser menor do que o esperado. Também discute como o controle da pandemia em alguns países e populações pode enfrentar barreiras de acessibilidade às vacinas se as forças de mercado regularem fortemente as novas tecnologias disponíveis, conforme a lei dos cuidados inversos.

Defining the threshold surgeon volume associated with improved patient outcomes for carotid endarterectomy.

OBJECTIVE: The outcomes for common vascular operations, such as carotid endarterectomy (CEA), are associated with surgeon volume. However, the number of operations associated with an improved stroke or death rate for CEA is not known. The objective of the current study was to define the annual surgeon volume of CEAs that is associated with a lower risk of stroke or death rate. METHODS: The Nationwide Inpatient Sample was analyzed to identify patients undergoing CEA between 2003 and 2009. Annual surgeon volume was correlated with a composite end point of in-hospital stroke or death. Mixed linear regression analyses were conducted to determine if annual surgeon volume of CEAs is independent predictor of the composite outcome. Receiver operating characteristic curves were constructed from the regression models and used to calculate the Youden Index, which defined the optimal cutoff point of annual surgeon volume of CEAs in predicting in-hospital stroke and death. This cutoff point was further assessed using Chi square analyses to determine whether incremental increases in the annual volume of CEAs were associated with a lower in-hospital stroke or death rate. RESULTS: A total of 104,918 CEA cases with surgeon identifiers were included in the analysis. The crude in-hospital stroke or death rate for CEA was 1.26 %. As expected, the stroke or death rate after CEA was higher for symptomatic patients, compared to asymptomatic patients (6.46 % vs 0.72%; P < .0001). For symptomatic patients, the relationship between surgeon volume and the composite end point was not significant (P = .435). In contrast, there was a strong relationship between surgeon volume and outcomes for asymptomatic patients undergoing CEA with a stroke/death rate of 1.66%, 0.91%, and 0.65% for low-, moderate-, and high-volume surgeons (P < .0001). Multivariate analysis identified age, African-American race, Charlson Comorbidity Index, and surgeon volume as independent predictors of stroke/death after CEA for asymptomatic carotid stenosis. For asymptomatic patients, the optimal cutoff number of CEAs to predict stroke/death rate was 19.4 CEAs per year (sensitivity = 74.9%, specificity = 72.6%, Youden index = 0.475). Analyses of outcomes at different cutoff points of surgeon volume revealed that the rate of crude complications and the adjusted probability of stroke or death was higher with case numbers less than 20 CEAs per year and lower with case numbers of 20 CEA or higher per year. Cutoff points above 20 cases were year did not yield a stroke/death rate that was significantly lower than the stroke/death rate at 20 CEAs per year, which confirmed the cutoff point of 20 CEAs per year. Only 16% of surgeons in the database achieved the threshold of 20 CEAs per year. CONCLUSIONS: Higher surgeon volume is associated with improved outcomes for CEAs performed in patients with asymptomatic carotid disease, but not for symptomatic carotid disease. For asymptomatic carotid disease, the probability of stroke or death was no longer reduced significantly at cutoff points of 20 or more CEAs per year. There are a number of other variables that may impact the clinical outcomes for CEA, so it is premature at this time to restrict privileges based on surgeon volume criteria.

Finding the body mass index cutoff for hospital readmission after ambulatory hernia surgery.

BACKGROUND: The suitability of ambulatory surgery in obese patients remains controversial. This study aimed to investigate the "cutoff" value of body mass index (BMI) associated with increased likelihood of hospital readmissions within the first 24 hours of surgery in patients undergoing ambulatory hernia repair. MATERIALS AND METHODS: The study used data from the 2012-2016 American College of Surgeons National Surgical Quality Improvement (ACS-NSQIP). Cochran Armitage trend tests were conducted to assess progression in rates hospital readmissions across categories of patient BMI. The minimum p-value method, Kolmogorov-Smirnov goodness of fit tests, logistic regression, and receiver-operating characteristic (ROC) curve analyses were used to investigate the cutoff of patient BMI indicative of increased likelihood of readmissions. RESULTS: A total of 214,125 ambulatory hernia repair cases were identified. Of those, 908 patients (0.42%) had an unexpected hospital admission within the first 24 hours after surgery. The readmission rates did not significantly increase across the categories of BMI. However, some of the reasons for readmission significantly differed by BMI category. Logistic regression analysis revealed no statistically significant association between BMI and hospital readmissions (odds ratio [95% Cl], 0.96 [0.91-1.02] P = .179). An optimal BMI threshold predictive of an increased likelihood of hospital readmissions was not identifiable by any of the statistical methods used. CONCLUSIONS: Although reasons for readmission differed by BMI category, there is no clear cutoff value of BMI associated with increased hospital readmission within the first 24 hours after surgery.

The Surgeon Volume-outcome Relationship: Not Yet Ready for Policy.

OBJECTIVE: Increasing surgeon volume may improve outcomes for index operations. We hypothesized that there may be surrogate operative experiences that yield similar outcomes for surgeons with a low-volume experience with a specific index operation, such as esophagectomy. BACKGROUND: The relationship between surgeon volume and outcomes has potential implications for credentialing of surgeons. Restrictions of privileges based on surgeon volume are only reasonable if there is no substitute for direct experience with the index operation. This study was aimed at determining whether there are valid surrogates for direct experience with a sample index operation-open esophagectomy. METHODS: The Nationwide Inpatient Sample (2003-2009) was utilized. Surgeons were stratified into low and high-volume groups based on annual volume of esophagectomy. Surrogate volume was defined as the aggregate annual volume per surgeon of upper gastrointestinal operations including excision of esophageal diverticulum, gastrectomy, gastroduodenectomy, and repair of diaphragmatic hernia. RESULTS: In all, 26,795 esophagectomies were performed nationwide (2003-2009), with a crude inhospital mortality rate of 5.2%. Inhospital mortality decreased with increasing volume of esophagectomies performed annually: 7.7% and 3.8% for low and high-volume surgeons, respectively (P < 0.0001). Among surgeons with a low-volume esophagectomy experience, increasing volume of surrogate operations improved the outcomes observed for esophagectomy: 9.7%, 7.1%, and 4.3% for low, medium, and high-surrogate-volume surgeons, respectively (P = 0.016). CONCLUSIONS: Both operation-specific volume and surrogate volume are significant predictors of inhospital mortality for esophagectomy. Based on these observations, it would be premature to limit hospital privileges based solely on operation-specific surgeon volume criteria.

Effects of Increasing Airway Pressures on the Pressure of the Endotracheal Tube Cuff During Pelvic Laparoscopic Surgery.

BACKGROUND: Tracheal tube cuff pressures exceeding the perfusion pressures of the tracheal mucosa have been associated with complications such as sore throat, tracheal mucosa ulcers, tracheal rupture, and subglottic stenosis. Despite appropriate inflation, many factors can increase the tracheal cuff pressure during mechanical ventilation. This prospective observational cohort study was designed to test the hypothesis that during a clinical model of decreasing respiratory compliance, the pressure within the endotracheal tube cuff will rise in direct relationship to increases in the airway pressures. METHODS: Twenty-eight adult obese patients (BMI ≥30 kg/m) scheduled for elective laparoscopic gynecologic procedures were enrolled. All patients received general anesthesia utilizing endotracheal tubes with low-pressure high-volume cuffs. After baseline adjustment of the cuff pressure to 25 cm H2O, the airway pressures and endotracheal cuff pressures were continuously measured using pressure transducers connected to the anesthesia circuit and cuff pilot, respectively. Data on cuff and airway pressures, mechanical ventilation parameters, intraabdominal pressures, and degree of surgical table inclination were collected throughout the anesthetic procedure. General linear regression models with fixed and random effects were fit to assess the effect of increases in airway pressures on cuff pressure, after adjusting for covariates and the clustered structure of the data. RESULTS: The mean (standard deviation) age and body mass index were 42.2 (8.8) years and 37.7 (5.1) kg/m, respectively. After tracheal intubation, the cuffs were overinflated (ie, intracuff pressures >30 cm H2O) in 89% of patients. The cuff pressures significantly changed after concomitant variations in the airway pressures from a mean (standard error) value of 29.6 (1.30) cm H2O before peritoneal insufflations, to 35.6 (0.68) cm H2O after peritoneal insufflation, and to 27.8 (0.79) cm H2O after peritoneal deflation (P < .0001). The multilevel mixed regression models revealed that after controlling for clustering of the data (at the patient and study phase levels) and covariates, increased peak airway pressures were significantly associated with increased pressures within the endotracheal cuff (coefficient [95% confidence interval], 0.25 [0.14-0.36]; P < .0001). Other variables associated with increasing endotracheal cuff pressure included degree of surgical table inclination (0.08 [0.04-0.12]; P = .0003) and I:E ratio of 1:1 (4.47 [2.10-6.83]; P = .0002). CONCLUSIONS: This clinical model of decreased respiratory compliance in mechanically ventilated patients reveals that the pressure within the endotracheal cuff significantly changes in direct relation to changes in the airway pressures. This finding may have clinical relevance in patients requiring prolonged use of high airway pressures.

Effects of hospital safety-net burden and hospital volume on failure to rescue after open abdominal aortic surgery.

OBJECTIVE: Failure to rescue (FTR) is defined as the inability to rescue a patient from major perioperative complications, resulting in operative mortality. FTR is a known contributor to operative mortality after open abdominal aortic surgery. Understanding the causes of FTR is essential to designing interventions to improve perioperative outcomes. The objective of this study was to determine the relative contributions of hospital volume and safety-net burden (the proportion of uninsured and Medicaid-insured patients) to FTR. METHODS: The Nationwide Inpatient Sample (2001-2011) was analyzed to investigate variables associated with FTR after elective open abdominal aortic operations in the United States. FTR was defined as in-hospital death following postoperative complications. Mixed multivariate regression models were used to assess independent predictors of FTR, taking into account the clustered structure of the data (patients nested into hospitals). RESULTS: A total of 47,233 elective open abdominal aortic operations were performed in 1777 hospitals during the study period. The overall incidences of postoperative complications, in-hospital mortality, and FTR in the whole cohort were 32.7%, 3.2%, and 8.6%, respectively. After adjusting for demographics, comorbidities, and hospital characteristics, safety-net burden was significantly associated with increased likelihood of FTR (highest vs lowest quartile of safety-net burden, odds ratio, 1.59; 95% confidence interval, 1.32-1.91; P < .0001). In contrast, after adjusting for safety-net burden, procedure-specific hospital volume was not significantly associated with FTR (P = .897). CONCLUSIONS: After adjusting for patient- and hospital-level variables, including hospital volume, safety-net burden was an independent predictor of FTR after open aortic surgery. Future investigations should be aimed at better understanding the relationship between safety-net hospital burden and FTR to design interventions to improve outcomes after open abdominal aortic surgery.

Hospital readmission after ambulatory laparoscopic cholecystectomy: incidence and predictors.

BACKGROUND: The aim of the study was to assess the rate of 30-d hospital readmissions after ambulatory laparoscopic cholecystectomy. MATERIALS AND METHODS: The 2009 to 2011 State Ambulatory Surgery and Services and State Inpatient Databases from California, Florida, and New York were analyzed to evaluate the incidence of 30-d readmissions after laparoscopic cholecystectomy performed in outpatient settings. Hospital transfers and the principal diagnoses of hospital readmission were analyzed as secondary outcomes. Multilevel generalized mixed linear regression analyses with fixed and random effects were used to evaluate variables associated with increased likelihood of readmissions. RESULTS: A total of 230,745 encounters for ambulatory laparoscopic cholecystectomies performed in 890 ambulatory facilities between 2009 and 2011 in the three states were analyzed. The rate of 30-d readmission was 20.2 per 1000 discharges. The rate of direct transfers from the ambulatory surgery center to an acute care hospital was 0.6 per 1000 discharges. The most common diagnoses of readmission were surgical complications, postoperative pain, infection, and nausea or vomiting. After adjusting for comorbidities, increasing age, male sex, non-Hispanic white race/ethnicity, any nonprivate insurance type, diagnosis of acute cholecystitis, use of intraoperative cholangiography, and having the procedure performed on a weekend were significantly associated with increased odds of 30-d readmissions. CONCLUSIONS: This large-state data analysis reveals that the unplanned admission and readmission rates after laparoscopic cholecystectomy are very low. Some causes of readmission (e.g., pain, nausea, and vomiting) are modifiable by the intervention of surgeons and anesthesia providers.

Renal Salvage with Renal Artery Stenting Improves Long-term Survival.

BACKGROUND: The Cardiovascular Outcomes in Renal Atherosclerotic Lesions (CORAL) Trial cast doubt on the benefits of renal artery stenting (RAS). However, the outcomes for patients with chronic kidney disease (CKD) were not analyzed separately in the CORAL Trial. We hypothesized that patients who experienced a significant improvement in renal function after RAS would have improved long-term survival, compared with patients whose renal function was not improved by stenting. METHODS: This single-center retrospective study included 60 patients with stage 3 or worse CKD and renal artery occlusive disease who were treated with RAS for renal salvage. Patients were categorized as "responders" or "nonresponders" based on postoperative changes in estimated glomerular filtration rate (eGFR) after RAS. "Responders" were those patients with an improvement of at least 20% in eGFR over baseline; all others were categorized as "nonresponders." Survival was analyzed using the Kaplan-Meier method. Cox proportional hazards regression was used to identify predictors of long-term survival. RESULTS: The median age of the cohort was 66 years (interquartile range [IQR], 60-73). Median preoperative eGFR was 34 mL/min/1.73 m2 (IQR, 24-45). At late follow-up (median 35 months, IQR, 22-97 months), 16 of 60 patients (26.7%) were categorized as "responders" with a median increase in postoperative eGFR of 40% (IQR, 21-67). Long-term survival was superior for responders, compared with nonresponders (P = 0.046 by log-rank test). Cox proportional hazards regression identified improved renal function after RAS as the only significant predictor of increased long-term survival (hazard ratio = 0.235, 95% confidence interval = 0.075-0.733; P = 0.0126 for improved versus worsened renal function after RAS). CONCLUSIONS: Successful salvage of renal function by RAS is associated with improved long-term survival. These data provide an important counter argument to the prior negative clinical trials that found no benefit to RAS.

Epidural analgesia does not increase the rate of inpatient falls after major upper abdominal and thoracic surgery: a retrospective case-control study.

PURPOSE: Postoperative epidural analgesia for major upper abdominal and thoracic surgery can provide significant benefits, including superior analgesia and reduced pulmonary dysfunction. Nevertheless, epidural analgesia may also be associated with decreased muscle strength, sympathetic tone, and proprioception that could possibly contribute to falls. The purpose of this retrospective case-control study was to search a large national database in order to investigate the possible relationship between postoperative epidural analgesia and the rate of inpatient falls. METHODS: Data from the nationwide inpatient sample for 2007-2011 were queried for adult patients who underwent elective major upper abdominal and thoracic surgery. Multiple International Classification of Diseases, Ninth Revision, Clinical Modification codes for inpatient falls and accidents were combined into one binary variable. Univariate analyses were used for initial statistical analysis. Logistic regression analyses and McNemar's tests were subsequently used to investigate the association of epidural analgesia with inpatient falls in a 1:1 case-control propensity-matched sample after adjustment of patients' demographics, comorbidities, and hospital characteristics. RESULTS: Forty-two thousand six hundred fifty-eight thoracic and 54,974 upper abdominal surgical procedures were identified. The overall incidence of inpatient falls in the thoracic surgery group was 6.54% with an increasing trend over the study period from 4.95% in 2007 to 8.11% in 2011 (P < 0.001). Similarly, the overall incidence of inpatient falls in the upper abdominal surgery group was 5.30% with an increasing trend from 4.55% in 2007 to 6.07% in 2011 (P < 0.001). Postoperative epidural analgesia was not associated with an increased risk for postoperative inpatient falls in the thoracic surgery group (relative risk [RR], 1.18; 95% confidence interval [CI], 0.95 to 1.47; P = 0.144) and in the upper abdominal surgery group (RR, 0.84; 95% CI 0.64 to 1.09; P = 0.220). Inpatient falls compared with non-falls were associated with a longer median (interquartile range) length of hospital stay in both the thoracic surgery group (11 [7-17] days vs 9 [6-16] days, respectively; P < 0.001) and the upper abdominal surgery group (12 [7-20] days vs 10 [6-17] days, respectively; P < 0.001). CONCLUSION: Our study suggests that postoperative epidural analgesia for patients undergoing major upper abdominal and thoracic surgery is not associated with an increased risk of inpatient falls.