ASA Physical Status Determination by General Internists and Impact on Cardiac Risk Assessment.

OBJECTIVES: Estimating cardiac risk is important for preoperative evaluation, and several risk calculators incorporate the American Society of Anesthesiologists (ASA) physical status score. The purpose of this study was to determine the concordance of ASA scores assigned by general internists and anesthesiologists and assess whether discrepancies affected cardiac risk estimation. METHODS: This observational study included military veterans evaluated in a preoperative evaluation clinic at a single center during a 12-month period. ASA scores were recorded by General Internal Medicine residents under the supervision of a General Internal Medicine attending, performing a preoperative medical consultation, and were compared with ASA scores assigned by an anesthesiologist on the day of surgery. ASA scores and Gupta Cardiac Risk Scores incorporating each ASA score were compared. RESULTS: Data were collected on 206 patients, 163 of whom had surgery within 90 days and were included. ASA scores were concordant in 60 patients (37.3%), whereas the ASA scores were rated lower by the general internist in 101 (62.0%) and higher in 2 (1.2%). Interrater reliability was low (κ = 0.08), and general internist scores were significantly lower than anesthesiologist scores (P < 0.01). Gupta Cardiac Risk Scores were calculated for 160 patients, and they exceeded 1% in 14 patients using the anesthesiologist ASA score, compared with 5 patients using the general internist score. CONCLUSIONS: ASA scores assigned by general internists in this study were significantly lower than those assigned by anesthesiologists, and these discrepancies in the ASA score can lead to substantially different conclusions about cardiac risk.

Racial disparities in postoperative outcomes persist for patients with inflammatory bowel disease under a colorectal enhanced recovery program.

INTRODUCTION: Enhanced recovery programs (ERPs) reduce racial disparities in surgical outcomes for general colorectal surgery populations. It is unclear, however, if disparities in IBD populations are impacted by ERPs. METHODS: Retrospective study comparing IBD patients undergoing major elective colorectal operations before (2006-2014) and after (2015-2021) ERP implementation using ACS-NSQIP data. The primary outcome of length of stay (LOS) was analyzed by negative binomial regression, and secondary outcomes (complications and readmissions) by logistic regression. RESULTS: Of 466 IBD patients, 47% were pre-ERP and 53% were ERP patients. In multivariable analysis stratified by ERP period, Black race was associated with increased odds of complications in the pre-ERP (OR 3.6, 95%CI 1.4-9.3) and ERP groups (OR 3.1 95%CI 1.3-7.6). Race was not a predictor of LOS or readmission in either group. High social vulnerability was associated with increased odds of readmission pre-ERP (OR 15.1, 95%CI 2.1-136.3), but this disparity was mitigated under ERPs (OR 1.4, 95%CI 0.4-5.6). CONCLUSION: While ERPs mitigated some disparities by social vulnerability, racial disparities persist in IBD populations even under ERPs. Further work is needed to achieve surgical equity for IBD patients.

Higher Pain Catastrophizing and Preoperative Pain is Associated with Increased Risk for Prolonged Postoperative Opioid Use.

BACKGROUND: Prolonged postoperative opioid use (PPOU) is considered an unfavorable post-surgical outcome. Demographic, clinical, and psychosocial factors have been associated with PPOU, but methods to prospectively identify patients at increased risk are lacking. OBJECTIVES: Our objective was to determine whether an individual or a combination of several psychological factors could identify a subset of patients at increased risk for PPOU. STUDY DESIGN: Observational cohort study with prospective baseline data collection and passive outcomes data collection. SETTING: A single VA medical center in the United States. METHODS: Patients were recruited from a preoperative anesthesia clinic where they were undergoing evaluation prior to elective surgery, and they completed a survey before surgery. The primary outcome was PPOU, defined as outpatient receipt of a prescribed opioid 31 to 90 days after surgery as determined from pharmacy records. Primary covariates of interest were pain catastrophizing, self-efficacy, and optimism. Additional covariates included social and demographic factors, pain severity, medication use, depression, anxiety, and surgical fear. RESULTS: Of 123 patients included in the final analyses, 30 (24.4%) had PPOU. In bivariate analyses, preoperative opioid use and preoperative nonsteroidal anti-inflammatory drug use were significantly associated with PPOU. The combination of high pain catastrophizing and high preoperative pain (OR 3.32, 95% CI 1.41 - 7.79) was associated with higher odds of PPOU than either alone, and the association remained significant after adjusting for preoperative opioid use (OR 2.56, 95% CI 1.04 - 6.29). LIMITATIONS: Patients were recruited from a single site, and the sample was not large enough to include potentially important variables such as procedure type. CONCLUSIONS: A combination of high pain catastrophizing and high preoperative pain has the potential to be a clinically useful means of identifying patients at elevated risk of PPOU.

Improving surgical patient education materials using informational design with visual elements.

Patient education materials (PEMs) serve as a foundation for educating patients and families across all surgical fields but are often not understandable. The National Institute of Health (NIH) recommends that PEMs be written at a grade 6-7 reading level; however, most current materials exceed that measure.3 Lack of understandable and appropriate surgical PEMs compounds the difficulties that low health literacy patients face with resultant poor surgical outcomes.2,3 The challenge for surgeons is to adequately educate patients pre-operatively and post-operatively on the complexities of surgery. Another challenge is to compact decades of education and training into an easy-to-understand medium for patients. To address this challenge, many physicians have utilized visual aids to improve PEM efficacy. While visual aids are a critical piece of education materials, they must be designed intentionally to be effective. The most important consideration is that the PEM communicates the information clearly to users. With this in mind, we created a framework for productive utilization of visual aids by integrating the C.A.R.P. graphic design technique into an existing surgical PEM to enhance communication and understandability.

Characterizing the impact of verbal communication and health literacy in the patient-surgeon encounter.

BACKGROUND: Patients with limited health literacy (HL) have difficulty understanding written/verbal information. The quality of verbal communication is not well understood. Therefore, our aim was to characterize patient-surgeon conversations and identify opportunities for improvement. METHODS: New colorectal patient-surgeon encounters were audio-recorded and transcribed. HL was measured. Primary outcomes were rates-of-speech, understandability of words, patient-reported understanding, and usage of medical jargon/statistics. Secondary outcomes included length-of-visit (LOV), conversation possession time, patient-surgeon exchanges, and speech interruptions. RESULTS: Significant variations existed between surgeons in rates-of-speech and understandability of words (p < 0.05). Faster rates-of-speech were associated with significantly less understandable words (p < 0.05). Patient-reported understanding varied by HL and by surgeon. Conversation possession time and usage of medical jargon/statistics varied significantly by surgeon (p < 0.05) in addition to patient-surgeon exchanges and interruptions. Patients with limited HL had shorter LOV. CONCLUSIONS: Significant variations exist in how surgeons talk to patients. Opportunities to improve verbal communication include slowing speech and using more understandable words.

Challenging weekend discharges associated with excess length of stay in surgical patients at Veterans Affairs hospitals.

BACKGROUND: Challenging discharges can lead to prolonged hospital stays. We hypothesized that surgical patients discharged from Veterans Affairs hospitals on weekdays have longer hospital stays and greater excess length of stay. METHODS: We identified inpatient general and vascular procedures at Veterans Affairs hospitals from 2007 to 2014. Expected length of stay was calculated using a stratified negative binomial model adjusted for patient/operative characteristics. Excess length of stay was defined as the difference between observed and expected length of stay. RESULTS: We identified 135,875 patients (80.4% weekday discharges, 19.6% weekend discharges). The average length of stay was 7.5 days. Patients with weekday discharges spent on average 2.5 more days in the hospital compared with patients discharged on weekends (8.0 vs. 5.5 days, P < .001); 28.5% of patients with weekday discharges had an observed length of stay at least 1 day longer than expected, compared with 16.4% of patients with weekend discharges (P < .001). CONCLUSION: Surgical patients are less frequently discharged from Veterans Affairs hospitals on the weekends than during the week, and this corresponds to an increased excess length of stay for patients ultimately discharged on weekdays. Exploring the opportunity to coordinate safe weekend discharges may improve efficiency of post-surgery hospital care and reduce healthcare costs.

The association of health literacy and postoperative complications after colorectal surgery: A cohort study.

BACKGROUND: Health literacy is a determinant of health. Few studies characterize its association with surgical outcomes. METHODS: Retrospective cohort study of patients undergoing elective colorectal surgery 2015-2020. Health literacy assessed using Brief Health Literacy Screening Tool. Outcomes were postoperative complications, LOS, readmissions, mortality. RESULTS: Of 552 patients, 46 (8.3%) had limited health literacy, 506 (91.7%) non-limited. Median age 57.7 years, 305 (55.1%) patients were female, 148 (26.8%) were Black. Limited patients had higher rates of overall complications (43.5% vs. 24.3%, p = 0.004), especially surgical site infections (21.7% vs. 11.3%, p = 0.04). Limited patients had longer LOS (5 vs 3.5 days, p = 0.006). Readmissions and mortality did not differ. On multivariable analysis, limited health literacy was independently associated with increased risk of complications (OR 2.03, p = 0.046), not LOS (IRR 1.05, p = 0.67). CONCLUSION: Limited health literacy is associated with increased likelihood of complications after colorectal surgery. Opportunities exist for health literate surgical care to improve outcomes for limited health literacy patients.

Multidisciplinary clinics for colorectal cancer may not provide more efficient coordination of care.

BACKGROUND: This retrospective study compares a multidisciplinary clinic (MDC) to standard care for time to treatment of colorectal cancer. METHODS: We queried our institutional ACS-NSQIP database for patients undergoing surgery for colorectal cancer from 2017 to 2020. Patients were stratified by initial clinic visit (MDC vs control). Primary endpoint was the time to start treatment (TST), either neoadjuvant therapy or surgery, from the date of diagnosis by colonoscopy. RESULTS: A total of 405 patients were evaluated (115 MDC, 290 Control). TST from diagnosis was not significantly shorter for the MDC cohort (MDC 30 days, Control 37 days; p = 0.07) even when stratified by type of initial treatment of neoadjuvant therapy (MDC 30, Control 34 days; p = 0.28) or surgery (MDC 32.5 days, Control 38 days; p = 0.35). CONCLUSION: Implementation of an MDC provides insignificant reduction in delay to start treatment for colorectal cancer patients as compared to standard care colorectal surgery clinics. CLASSIFICATION: Colorectal.

Psychosocial Determinants of Readmission After Surgery.

BACKGROUND: Quality of life and psychosocial determinants of health, such as health literacy and social support, are associated with increased health care utilization and adverse outcomes in medical populations. However, the effect on surgical health care utilization is less understood. OBJECTIVE: We sought to examine the effect of patient-reported quality of life and psychosocial determinants of health on unplanned hospital readmissions in a surgical population. RESEARCH DESIGN: This is a prospective cohort study using patient interviews at the time of hospital discharge from a Veterans Affairs hospital. SUBJECTS: We include Veterans undergoing elective inpatient general, vascular, or thoracic surgery (August 1, 2015-June 30, 2017). MEASURES: We assessed unplanned readmission to any medical facility within 30 days of hospital discharge. RESULTS: A total of 736 patients completed the 30-day postoperative follow-up, and 16.3% experienced readmission. Lower patient-reported physical and mental health, inadequate health literacy, and discharge home with help after surgery or to a skilled nursing or rehabilitation facility were associated with an increased incidence of readmission. Classification regression identified the patient-reported Veterans Short Form 12 (SF12) Mental Component Score <31 as the most important psychosocial determinant of readmission after surgery. CONCLUSIONS: Mental health concerns, inadequate health literacy, and lower social support after hospital discharge are significant predictors of increased unplanned readmissions after major general, vascular, or thoracic surgery. These elements should be incorporated into routinely collected electronic health record data. Also, discharge plans should accommodate varying levels of health literacy and consider how the patient's mental health and social support needs will affect recovery.

Visual teaching aids improve patient understanding and reduce anxiety prior to a colectomy.

BACKGROUND: Informed consent forms consist of large blocks of written information that may be difficult for patients to understand. Visual teaching aids are promising, however, they have not been studied as a pre-operative educational tool for common surgical procedures. We pilot tested the use of a visual teaching aid during the informed consent process for a colectomy. METHODS: A randomized pilot study was performed. Participants were randomized into the visual teaching aid group or standard care. Following the consent process, participants were questioned about potential surgical complications, anxiety, satisfaction, and understanding. RESULTS: 30 participants were enrolled. Potential complication recall and patient-reported understanding were improved in the visual group (p = 0.01, p = 0.03). Anxiety levels were reduced in the visual group (p = 0.02). No statistically significant data were found for satisfaction (p = 0.75). CONCLUSIONS: Utilizing a visual teaching aid during the consent process for colectomy increases patient recall of risks, reduces anxiety, and improves understanding.

Impact of Gastrointestinal Surgical Site Wound Complications on Long-term Healthcare Utilization.

IMPORTANCE: Wound complication following gastrointestinal surgery substantially impacts the quality and costs of surgical care. The impact of wound complication on subsequent long-term healthcare utilization has not been fully studied. OBJECTIVE: We assessed the impact of surgical wound complication on inpatient and outpatient healthcare utilization in the 2 years after gastrointestinal (GI) surgery. DESIGN: An observational retrospective cohort study was conducted on Veterans Affairs health system patients who underwent an inpatient GI surgical procedure, were assessed by the Veterans Affairs Surgical Quality Improvement Program (VASQIP), and were discharged alive from Veterans Affairs (VA) hospitals between October 1, 2007 and September 30, 2014. SETTING: Population-based PARTICIPANTS: A total of 64,351 patients underwent a GI surgical procedure in the VA system between 2007 and 2014. The cohort was 93.5% male, with a median age of 63.0 years (interquartile range (IQR) 57.0-70.0). A total of 7880 patients (12.2%) had at least one reported wound complication, 5460 of which had their postoperative wound complication classified by a VASQIP nurse. EXPOSURE: VASQIP-assessed or ICD-9-coded wound complication in the 30 days after surgery MAIN OUTCOME MEASUREMENTS: Inpatient visits, total inpatient days, outpatient visits, and emergency department visits, and operative interventions up to 2 years after discharge from index admission RESULTS: Patients with a postoperative wound complication had greater inpatient healthcare utilization compared with no-wound complication for up to 2 years after surgery: inpatient admissions (mean number 3.5 vs. 2.8; P < .001), inpatient bed days (mean 41.0 vs. 25.0; P < .001). Patients with a postoperative wound complication also had greater 2-year outpatient utilization than the no-wound complication cohort: outpatient visits (mean number 92.7 vs. 75.9; P < .001) and emergency department visits (mean 3.5 vs. 2.7; P < .001). The same relationship held for wound-related parameters; inpatient admissions (2.2 vs. 0.4; P < .001); inpatient bed days (21.4 vs. 3.7; P < .001); and outpatient visits (56.2 vs. 9.7; P < .001). A greater proportion of patients in the wound complication cohort had an operative intervention for all time intervals examined (P < .001). CONCLUSIONS: Surgical wound complications impact healthcare utilization patterns for up to 2 years after the index procedure including hospital readmissions and operative interventions; efforts to reduce postoperative wound complications will have substantial effects on patient outcomes and healthcare expenditures well beyond the 30-day postoperative period.

The impact of an enhanced recovery program (ERP) on the costs of colorectal surgery.

BACKGROUND: Enhanced Recovery Programs (ERPs) benefit patients but their effects on healthcare costs remain unclear. This study aimed to investigate the costs associated with a colorectal ERP in a large academic health system. METHODS: Patients who underwent colorectal surgery from 2012 to 2014 (pre-ERP) and 2015-2017 (ERP) were propensity score matched based on patient and operative-level characteristics. Primary outcomes were median variable, fixed, and total costs. Secondary outcomes included length-of-stay (LOS), readmissions, and postoperative complications (POCs). RESULTS: 616 surgical cases were included. Patient and operative-level characteristics were similar between the cohorts. Variable costs were $1028 less with ERP. ERP showed savings in nursing, surgery, anesthesiology, pharmacy, and laboratory costs, but had higher fixed costs. Total costs between the two groups were similar. ERP patients had significantly shorter LOS (-1 day, p < 0.01), but similar 30-day readmission rates and overall POCs. CONCLUSIONS: Implementation of an ERP for colorectal surgery was associated with lower variable costs compared to pre-ERP.

Racial disparities exist in surgical outcomes for patients with inflammatory bowel disease.

BACKGROUND: Racial disparities in surgical outcomes exist for Black patients with IBD compared to White patients. However, previous studies fail to include other racial/ethnic populations. We hypothesized these disparities exist for Hispanic and Asian patients. METHODS: This is a retrospective cohort study of patients undergoing surgery for IBD using the American College of Surgeons National Surgical Quality Improvement Program (ACS- NSQIP) database (2005-2017). Bivariate comparisons and adjusted multivariable regressions were performed to evaluate associations between race and outcomes. RESULTS: Of 23,901 patients with IBD, the racial/ethnic makeup were: 88.7% White, 7.6% Black, 2.4% Hispanic and 1.4% Asian. Overall mean LOS was 8 days (SD 8.2) and significantly varied between groups (8d for White, 10d for Black, 8.5d for Hispanic, and 11.1d for Asian; p < 0.001). Hispanic patients had the highest odds of readmission (OR: 1.4; 95% CI 1.1-1.8). Black patients had increased odds of renal insufficiency (OR: 1.8; 95% CI 1.1-2.9), bleeding requiring transfusions (OR: 1.7; 95% CI 1.4-1.9), and sepsis (OR: 1.7; 95% CI 1.4-2.02) compared to White patients. CONCLUSIONS: Racial disparities exist among IBD patients undergoing surgery. Black, Hispanic and Asian IBD patients experience major disparities in post-operative complications, readmissions and LOS, respectively, when compared to White patients with IBD. Future research is needed to better understand the mechanisms of these disparities including evaluation of social determinants of health.

Views of primary care physicians and rheumatologists regarding screening and treatment of hyperlipidemia among patients with rheumatoid arthritis.

BACKGROUND: Despite high risk for cardiovascular disease (CVD) mortality, screening and treatment of hyperlipidemia in patients with rheumatoid arthritis (RA) is suboptimal. We asked primary care physicians (PCPs) and rheumatologists to identify barriers to screening and treatment for hyperlipidemia among patients with RA. METHODS: We recruited rheumatologists and PCPs nationally to participate in separate moderated structured group teleconference discussions using the nominal group technique. Participants in each group generated lists of barriers to screening and treatment for hyperlipidemia in patients with RA, then each selected the three most important barriers from this list. The resulting barriers were organized into physician-, patient- and system-level barriers, informed by the socioecological framework. RESULTS: Twenty-seven rheumatologists participated in a total of 3 groups (group size ranged from 7 to 11) and twenty PCPs participated in a total of 3 groups (group size ranged from 4 to 9). Rheumatologists prioritized physician level barriers (e.g. 'ownership' of hyperlipidemia screening and treatment), whereas PCPs prioritized patient-level barriers (e.g. complexity of RA and its treatments). CONCLUSION: Rheumatologists were conflicted about whether treatment of CVD risk among patients with RA should fall within the role of the rheumatologist or the PCP. All participating PCPs agreed that CVD risk reduction was within their role. Factors that influenced PCPs' decisions for screening and treatment for CVD risk in patients with RA were mainly related to their concern about how treatment for CVD risk could influence RA symptomatology (myalgia from statins) or how inflammation from RA and RA medications influences lipid profiles.

Perioperative opioid use and pain-related outcomes in the Veterans Health Administration.

Understanding variation in perioperative opioid exposure and its effect on patients' outcomes is critical for pain management. This study characterized perioperative exposure to morphine and its association with postoperative pain and 30-day readmissions. We utilized nationwide Veterans Healthcare Administration (VHA) data on four high-volume surgical procedures, 2007-2014. We identified 235,239 Veterans undergoing orthopedic, general, or vascular surgery; 5.4% high trajectories (116.1 OME/Day), 53.2% medium trajectories (39.7 OME/Day), and 41.4% low trajectories (19.1 OME/Day). Modeled estimates suggest that patients in the high OME group had higher risk of a pain-related readmission (OR: 1.59; CI: 1.39, 1.83) compared to the low OME trajectory. Yet when stratified by pain trajectory, patients with high pain and high OME had lower risk of a pain-related readmission compared to patients in the high pain low OME group (OR: 0.76, CI: 0.62, 0.94). In conclusion, patients receiving high perioperative OME are more likely to return to care for pain-related problems. This study highlights opportunities to reduce the amount of prescriptions opioids in the communities.

The Association of Enhanced Recovery Pathway and Acute Kidney Injury in Patients Undergoing Colorectal Surgery.

BACKGROUND: Acute kidney injury is associated with increased postoperative length of hospital stay and increases the risk of postoperative mortality. The association between the development of postoperative acute kidney injury and the implementation of an enhanced recovery after surgery protocol remains unclear. OBJECTIVE: This study aimed to examine the relationship between the implementation of an enhanced recovery pathway and the development of postoperative acute kidney injury. DESIGN: In this retrospective cohort study, a prospectively maintained database of patients who underwent elective colorectal surgery in an enhanced recovery pathway were compared to a hospital historical National Surgical Quality Improvement Program colorectal registry of patients. SETTINGS: This study was conducted at the University of Alabama at Birmingham, a tertiary referral center. PATIENTS: A total of 1052 patients undergoing elective colorectal surgery from 2012 through 2016 were included. MAIN OUTCOME MEASURES: The development of postoperative acute kidney injury was the primary outcome measured. RESULTS: Patients undergoing an enhanced recovery pathway had significantly greater rates of postoperative acute kidney injury than patients not undergoing an enhanced recovery pathway (13.64% vs 7.08%; p < 0.01). Our adjusted model indicated that patients who underwent an enhanced recovery pathway (OR, 2.31; 95% CI, 1.48-3.59; p < 0.01) had an increased risk of acute kidney injury. Patients who developed acute kidney injury in the enhanced recovery cohort had a significantly longer median length of stay than those who did not (median 4 (interquartile range, 4-9) vs 3 (interquartile range, 2-5) days; p=0.04). LIMITATIONS: This study did not utilize urine output as a modality for detecting acute kidney injury. Data are limited to a sample of patients from a large academic medical center participating in the National Surgical Quality Improvement Program. Interventions or programs in place at our institution that aimed at infection reduction or other initiatives with the goal of improving quality were not accounted for in this study. CONCLUSION: The implementation of an enhanced recovery after surgery protocol is independently associated with the development of postoperative acute kidney injury.See Video Abstract at http://links.lww.com/DCR/B69. LA ASOCIACIÓN DE VÍA DE RECUPERACIÓN MEJORADA Y LESIÓN RENAL AGUDA EN PACIENTES DE CIRUGÍA COLORRECTAL: La lesión renal aguda se asocia con una mayor duración en la estancia hospitalaria y aumenta el riesgo de la mortalidad postoperatoria. La asociación entre el desarrollo de la lesión renal aguda postoperatoria y la implementación de un protocolo de Recuperación Mejorada después de la cirugía, sigue sin ser clara.Examinar la relación entre la implementación de una vía de Recuperación Mejorada y el desarrollo de lesión renal aguda postoperatoria.Estudio de cohorte retrospectivo, de una base de datos mantenida prospectivamente, de pacientes que se sometieron a cirugía colorrectal electiva, en una vía de Recuperación Mejorada, se comparó con el registro histórico de los pacientes colorrectales del Programa Nacional de Mejora de la Calidad Quirúrgica.Universidad de Alabama en Birmingham, un centro de referencia terciario.Un total de 1052 pacientes sometidos a cirugía colorrectal electiva desde 2012 hasta 2016.Desarrollo de lesión renal aguda postoperatoria.Los pacientes sometidos a una vía de Recuperación Mejorada, tuvieron tasas significativamente mayores de lesiones renales agudas postoperatorias, en comparación con los pacientes de Recuperación no Mejorada (13.64% vs 7.08%; p < 0.01). Nuestro modelo ajustado indicó que los pacientes que se sometieron a una vía de Recuperación Mejorada (OR, 2.31; IC, 1.48-3.59; p < 0.01) tuvieron un mayor riesgo de lesión renal aguda. Los pacientes que desarrollaron daño renal agudo en la cohorte de Recuperación Mejorada, tuvieron una estadía mediana significativamente más larga en comparación con aquellos que no [mediana 4 (rango intercuartil (RIC) 4-9) versus 3 (RIC 2-5) días; p = 0.04].Este estudio no utilizó la producción de orina como una modalidad para detectar daño renal agudo. Los datos se limitan a una muestra de pacientes de un gran centro médico académico, que participa en el Programa Nacional de Mejora de la Calidad Quirúrgica. Las intervenciones o programas implementados en nuestra institución, destinados a la reducción de infecciones u otras iniciativas, con el objetivo de mejorar la calidad, no se tomaron en cuenta para este estudio.La implementación de una Recuperación Mejorada después del protocolo de cirugía, se asocia independientemente con el desarrollo de lesión renal aguda postoperatoria.Consulte Video Resumen en http://links.lww.com/DCR/B69. (Traducción-Dr. Fidel Ruiz-Healy).