Systematic Literature Review of Health-Related Quality-of-Life Measures for Caregivers of Older Adult Trauma Patients.

INTRODUCTION: As the older adult population increases, hospitals treat more older adults with injuries. After leaving, these patients suffer from decreased mobility and independence, relying on care from others. Family members often assume this responsibility, mostly informally and unpaid. Caregivers of other older adult populations have increased stress and decreased caregiver-related quality of life (CRQoL). Validated CRQoL measures are essential to capture their unique experiences. Our objective was to review existing CRQoL measures and their validity in caregivers of older adult trauma patients. METHODS: A professional librarian searched published literature from the inception of databases through August 12, 2022 in MEDLINE (via PubMed), Embase (via Elsevier), and CINAHL Complete (via EBSCO). We identified 1063 unique studies of CRQoL in caregivers for adults with injury and performed a systematic review following COnsensus-based Standards for the selection of health Measurement Instruments guidelines for CRQoL measures. RESULTS: From the 66 studies included, we identified 54 health-related quality-of-life measures and 60 domains capturing caregiver-centered concerns. The majority (83%) of measures included six or fewer CRQoL content domains. Six measures were used in caregivers of older adults with single-system injuries. There were no validated CRQoL measures among caregivers of older adult trauma patients with multisystem injuries. CONCLUSIONS: While many measures exist to assess healthcare-related quality of life, few, if any, adequately assess concerns among caregivers of older adult trauma patients. We found that CRQoL domains, including mental health, emotional health, social functioning, and relationships, are most commonly assessed among caregivers. Future measures should focus on reliability and validity in this specific population to guide interventions.

Development of a prospective biliary dashboard to compare performance and surgical cost.

BACKGROUND: Transparency around surgeon level data may align healthcare delivery with quality care for patients. Biliary surgery includes numerous procedures performed by both general surgeons and subspecialists alike. Cholecystectomy is a common surgical procedure and an optimal cohort to measure quality outcomes within a healthcare system. METHODS: Data were collected for 5084 biliary operations performed by 68 surgeons in 11 surgical divisions in a health system including a tertiary academic hospital, two regional community hospitals, and two ambulatory surgery centers. A privacy protected dashboard was developed to compare surgeon performance and cost between July 2018 and June 2022. A sample cohort of patients ≥ 18 years who underwent cholecystectomy were compared by operative time, cost, and 30-day outcomes. RESULTS: Over 4 years, 4568 cholecystectomy procedures were performed by 57 surgeons. Operations were done by 57 surgeons in four divisions and included 3846 (84.2%) laparoscopic cholecystectomies, 601 (13.2%) laparoscopic cholecystectomies with cholangiogram, and 121 (2.6%) open cholecystectomies. Patients were admitted from the emergency room in 2179 (47.7%) cases while 2389 (52.3%) cases were performed in the ambulatory setting. Individual surgeons were compared to peers for volume, intraoperative data, cost, and outcomes. Cost was lowest at ambulatory surgery centers, yet only 4.2% of elective procedures were performed at these facilities. Prepackaged kits with indocyanine green were more expensive than cholangiograms that used iodinated contrast. The rate of emergency department visits was lowest when cases were performed at ambulatory surgery centers. CONCLUSION: Data generated from clinical dashboards can inform surgeons as to how they compare to peers regarding quality metrics such as cost, time, and complications. In turn, this may guide strategies to standardize care, optimize efficiency, provide cost savings, and improve outcomes for cholecystectomy procedures. Future application of clinical dashboards can assist surgeons and administrators to define value-based care.

Optimal Nutrition in the Older Adult: Beneficial Versus Ineffective Supplements.

PURPOSE OF REVIEW: Proper nutrition in older adults is essential, as nutritional deficiencies are common in this population. This review aims to summarize the benefits and risks of nutritional supplementation in the older adult population including the efficacy of various supplements, their risks, and common drug interactions with frequently prescribed medications. RECENT FINDINGS: In recent years, a growing percentage of older adults have been found to take multiple daily nutritional supplements. This population has complex nutritional needs due to the physiology of aging and the presence of comorbidities. However, many primary care providers are unaware of the benefits and drawbacks of nutritional supplementation in the elderly. This review summarizes the current literature to provide more clarity to providers on how to support this population's nutritional needs. Nutritional supplementation is essential for elderly populations who may not be able to obtain adequate nutrition from dietary sources. Supplements vary widely in efficacy and safety. As such, supplementation should be individualized and guided by a qualified healthcare provider to ensure patients receive effective, beneficial nutrition.

Consensus statement of the consortium for LESS cholecystectomy.

Many surgeons attempting Laparo-Endoscopic Single Site (LESS) cholecystectomy have found the operation difficult, which is inconsistent with our experience. This article is an attempt to promote a standardized approach that we feel surgeons with laparoscopic skills can perform safely and efficiently. This is a four-trocar approach consistent with the four incisions utilized in conventional laparoscopic cholecystectomy. After administration of general anesthesia, marcaine is injected at the umbilicus and a 12-mm vertical incision is made through the already existing anatomical scar of the umbilicus. A single four-trocar port is inserted. A 5-mm deflectable-tip laparoscope is placed through the trocar at the 8 o'clock position, a bariatric length rigid grasper is inserted through the trocar at the 4 o'clock position (to grasp the fundus), and a rigid bent grasper is placed through the 10-mm port (to grasp the infundibulum). This arrangement of the instruments promotes minimal internal and external instrument clashing with simultaneous optimization of the operative view. This orientation allows retraction of the gallbladder in a cephalad and lateral direction, development of a window between the gallbladder and the liver which promotes the "critical view" of the cystic duct and artery, and provides triangulation with excellent visualization of the operative field. The operation is concluded with diaphragmatic irrigation of marcaine solution to minimize postoperative pain. Standardization of LESS cholecystectomy will speed adoption, reduce intraoperative complications, and improve the efficiency and safety of the approach.

Evaluation of malnutrition via modified GLIM criteria for in patients undergoing emergent gastrointestinal surgery.

BACKGROUND: Malnutrition remains a critical public health issue in the US, particularly in surgery where perioperative malnutrition is commonly underdiagnosed and undertreated. In 2016, the Global Leadership Initiative on Malnutrition (GLIM) proposed a set of consensus criteria for the diagnosis of malnutrition. Our project aims to assess the post-operative outcomes of patients meeting a modified GLIM-defined (mGLIM) malnutrition criteria undergoing emergent gastrointestinal surgery (EGS) in the NSQIP database. Current GLIM-criteria were modified with addition of admission albumin (a NSQIP-defined malnutrition variable). METHODS: Adapting NSQIP data, mGLIM criteria are (1) BMI of ≤20 for age ≤ 70 and BMI ≤22 for age ≥ 71, (2) weight loss > 10% within the past 6 months, (3) admission albumin ≤ 3.5, and (4) emergent bowel surgery as etiologic criteria of acute disease/injury. All patients undergoing emergent small bowel, colon, and rectal procedures were extracted from the NSQIP database and included in the study. Multivariate linear and logistic regression models controlling for relevant covariates were developed to evaluate mGLIM criteria on length of stay (LOS), mortality, and overall complication rates. RESULTS: We included 31,029 patients who underwent emergent bowel surgeries from years 2011-2016. Demographically, 53.6% (n = 16,622) were female, 13.0% (n = 4023) were African American, and 78.3% (n = 24,292) were Caucasian. Case composition included 71.5% colon operations, 28.0% small bowel, and 0.5% rectal cases. Overall, 1.7% (n = 517) had data necessary to qualify as malnourished as per mGLIM. Controlling for covariates, multivariate linear and logistic regression analyses show that these patients have significantly higher mortality for both colon (p < 0.001, CI 1.55 | 2.61) and small bowel (p = 0.022, CI 1.08 | 2.67) procedures, longer LOS for colon (p < 0.001, CI 1.93 | 4.33) operations, and higher post-operative complications for both colon (p < 0.001, CI 1.61 | 2.62) and small bowel (p < 0.001, CI 1.57 | 3.37) cases. CONCLUSION: This analysis shows that mGLIM criteria malnutrition is associated with poor clinical outcomes following EGS affecting LOS and mortality. Our data indicates the new mGLIM criteria can be a powerful and simple predictive score for malnutrition that can be used to predict malnutrition-related risk of poor outcomes after EGS.

Postoperative hypoxemia: common, undetected, and unsuspected after bariatric surgery.

BACKGROUND: Patients undergoing gastric bypass are at greater than ordinary risk for postoperative respiratory insufficiency, presumably related to obstructive sleep apnea (OSA) and patient-controlled analgesia (PCA). This study was proposed to quantify the magnitude of the problem. METHODS: Fifteen patients undergoing gastric bypass had oxygen saturation (SpO(2)) recorded continuously, but not displayed, for 24h postoperatively; eight also had arterial blood analysis every 4h. All received narcotic PCA. SpO(2)<90% lasting more than 10 s was reviewed. Results are mean+/-SEM. RESULTS: Mean age was 44+/-4 y, and mean BMI was 48+/-2kg/m(2); 77% had OSA. Every patient had more than one episode with SpO(2)<90% for longer than 30s undetected by routine monitoring; most had multiple episodes. Nadir SpO(2) averaged 75% +/- 8%. Mean longest duration of desaturation below 90% averaged 21+/-15min. Mean PaCO(2) was 37+/-3mm Hg; maximum PaCO(2) was 47mm Hg. CONCLUSIONS: Severe and prolonged episodes of hypoxemia were a consistent finding, despite aggressive preoperative diagnosis and treatment of OSA, including use of CPAP postoperatively. Although some postoperative hypoventilation was expected, the degree and frequency of desaturation were surprising. No patient exhibited arterial PaCO(2) evidence of hypoventilation. No patient experienced cardiopulmonary arrest/instability, in spite of severe, repeated episodes of hypoxemia. In no instance was a significant hypoxemic episode suspected or detected. Continuous pulse oximetry monitoring, with an audible alarm set for a saturation less than 90% for 10 s, would have alerted providers to 100% of significant hypoxemic episodes. Our recommendation is routinely monitoring (with alarm capability enabled) every bariatric surgical patient, to prevent such occurrence.

Objective evidence that bariatric surgery improves obesity-related obstructive sleep apnea.

BACKGROUND: Obstructive sleep apnea (OSA) is associated with obesity. Our aim in this study is to report objective improvement of obesity-related OSA and sleep quality after bariatric surgery. METHODS: Prospective bariatric patients were referred for polysomnography if they scored >or=6 on the Epworth Sleepiness Scale. The severity of OSA was categorized by the respiratory disturbance index (RDI) as follows: absent, 0 to 5; mild, 6 to 20; moderate, 21 to 40; and severe, <40. Patients were referred for repeat polysomnography 6 to 12 months after bariatric surgery or when weight loss exceeded 75 lbs. Means were compared using paired t tests. Chi-square tests and linear regression models were used to assess associations between clinical parameters and RDI; P<.05 was considered statistically significant. RESULTS: Of 349 patients referred for polysomnography, 289 patients had severe (33%), moderate (18%), and mild (32%) OSA; 17% had no OSA. At a median of 11 months (6 to 42 months) after bariatric surgery, mean body mass index (BMI) was 38 +/- 1 kg/m2 (P<.01 vs 56 +/- 1 kg/m2 preoperatively) and the mean RDI decreased to 15 +/- 2 (P<.01 vs 51 +/- 4 preoperatively) in 101 patients who underwent postoperative polysomnography. In addition, minimum oxygen saturation, sleep efficiency, and rapid eye movement latency improved, and the requirement for continuous positive airway pressure was reduced (P

Morbidity of anastomotic leaks in patients undergoing Roux-en-Y gastric bypass.

OBJECTIVE: To document the effect of anastomotic leaks on morbidity and mortality after Roux-en-Y gastric bypass (RYGB) for obesity. DESIGN: Prospectively collected data on 840 consecutive patients who underwent RYGB between 1998 and 2005. Multivariate logistic regression analysis was used to determine the effect of anastomotic leaks on postoperative morbidity independent of sex, age, preoperative body mass index, access (open vs laparoscopic), calendar year of RYGB, and comorbidities. P < .05 was considered significant. RESULTS: A total of 36 patients (4.3%) developed leaks after RYGB. Patients who developed anastomotic leaks had a significantly higher overall complication rate (61% vs 20%, P < .001), mortality (14% vs 4%, P = .01), and duration of hospital stay (24.5 vs 4.5 days, P < .001) compared with patients who did not develop leaks. In a multivariate logistic regression model, anastomotic leaks increased the likelihood of mortality (odds ratio [OR], 15; 95% confidence interval [CI], 3-80; P = .002) and overall complications (OR, 6; 95% CI, 3-13; P < .001), specifically sepsis (OR, 27; 95% CI, 2-472; P = .02), renal failure (OR, 16; 95% CI, 3-99; P = .003), small-bowel obstruction (OR, 11; 95% CI, 2-68; P = .008), internal hernia (OR, 10; 95% CI, 2-51; P = .008), thromboembolism (OR, 9; 95% CI, 3-27; P < .001), and incisional hernia (OR, 5; 95% CI, 2-13; P = .001). CONCLUSIONS: Anastomotic leaks significantly increase the likelihood of developing additional life-threatening complications after RYGB. Close and aggressive monitoring is recommended for early detection and management of added complications, should they occur.

Protein kinase C-zeta is critical in pancreatitis-induced apoptosis of Kupffer cells.

Protein kinase C-zeta (PKC-zeta) regulates cell death via NF-kappaB; therefore, we tested the hypothesis that PKC-zeta plays a critical role in pancreatitis-induced Kupffer cell apoptosis. Acute pancreatitis was induced in rats by cerulein injection 24 h later, livers were assayed for PKC-zeta, IKKalpha, IKKbeta, IKKgamma, NF-kappaB, Fas/FasL, and apoptosis was assessed with Caspase-3 and DNA fragmentation. Kupffer cells from unoperated rats were infected with a PKC-zeta domain-negative adenovirus (AdPKCzeta-DN) to inhibit PKC-zeta, or transfected with pCMVPKC-zeta to overexpress PKC-zeta, and then stimulated with pancreatic elastase; cellular extracts were assayed for PKC-zeta, IKKalpha, IKKbeta, IKKgamma, NF-kappaB, Fas/FasL, Caspase-3, and DNA fragmentation. Cerulein-induced pancreatitis upregulated PKC-zeta protein and activity, IKKbeta, IKKgamma, NF-kappaB, Fas/FasL, Caspase-3 and increased DNA fragmentation in rat livers (all p < 0.001 vs control). AdPKCzeta-DN abolished elastase-induced upregulation of PKC-zeta activity, IKKbeta, IKKgamma, NF-kappaB, Fas/FasL, Caspase-3 and DNA fragmentation (all p < 0.001 vs infection control), whereas overexpression of PKC-zeta augmented elastase-induced upregulation of IKKbeta, IKKgamma, Fas/FasL, Caspase-3 and DNA fragmentation (p < 0.001 vs control). PKC-zeta plays a critical role in pancreatitis-induced Kupffer cell apoptosis via NF-kappaB and Fas/FasL. The ability of Kupffer cells to autoregulate their stress response by upregulating their death receptor/ligand and key proapoptotic cell signaling systems warrants further investigation.

Bariatric surgery improves urinary incontinence in morbidly obese individuals.

BACKGROUND: Urinary incontinence is common in obese individuals. We report on the prevalence of urinary incontinence in patients undergoing bariatric surgery and the effect of surgically induced weight loss on urinary incontinence. METHODS: The prospectively collected data from 201 consecutive candidates for bariatric surgery were evaluated. The patients were surveyed using a questionnaire regarding the duration of incontinence, stress/urge incontinence symptoms, and incontinence severity before and after undergoing bariatric surgery. Severity was quantified using a validated index developed Data are presented as the mean +/- standard deviation. RESULTS: Of 201 patients, 65 (32%) reported urinary incontinence. Of the 65 patients, 44 women and 1 man (age 49 +/- 11 years, body mass index 48 +/- 7 kg/m(2)) underwent Roux-en-Y gastric bypass (n = 42) or laparoscopic-assisted gastric banding (n = 3). Of the 38 patients who reported mild (2%), moderate (48%), and severe (50%) urinary incontinence preoperatively who had complete follow-up at > or = 6 months postoperatively, 19 (50%) had demonstrated resolution of urinary incontinence and 19 had reported residual slight-moderate (37%) or severe (13%) urinary incontinence. The overall severity score improved from 5.4 +/- 2.3 to 2.3 +/- 2.8 postoperatively (P <.001); the percentage of excess body weight loss was 61% +/- 19%. The patients reported subjective improvement within 4 months postoperatively or after a 50-lb weight loss. CONCLUSION: Urinary incontinence is prevalent in bariatric surgery patients. Surgically induced weight loss results in improvement or resolution of urinary incontinence in 82% of patients. The findings from this large cohort warrant additional investigation with urodynamic studies.

The role of p65 NF-kappaB/RelA in pancreatitis-induced Kupffer cell apoptosis.

Acute pancreatitis induces liver injury by upregulating Kupffer cell-derived Fas/FasL; on the other hand, acute pancreatitis induces apoptosis of Kupffer cells via NF-kappaB-dependent pathways. The balance between upregulation of Fas/FasL and Fas/FasL-induced apoptosis of its originator cell may determine the severity of pancreatitis-related liver injury. The aim of our study was to determine the role of p65 NF-kappaB/RelA in pancreatitis-induced Kupffer cell apoptosis. Acute pancreatitis was induced in NIH Swiss mice by a choline-deficient ethionine-supplement (CDE) diet. In vitro mouse Kupffer cell line was transfected with p65 siRNA and treated with pancreatic elastase to mimic pancreatitis. CDE pancreatitis upregulated nuclear translocation of p65 NF-kappaB/RelA, Fas/FasL, caspase-3, and DNA fragmentation in mice livers (all P < 0.001). In vitro, pancreatic elastase mimicked CDE-pancreatitis by upregulating nuclear translocation of p65 NF-kappaB/RelA, Fas/FasL, caspase-3, DNA fragmentation, and apoptosis in Kupffer cells (all P < 0.001). Transfection with p65 siRNA attenuated the elastase-induced nuclear translocation of p65 NF-kappaB/RelA, upregulation of Fas/FasL, caspase-3, DNA fragmentation, and apoptosis in Kupffer cells (all P < 0.001). Acute pancreatitis activates p65 NF-kappaB/RelA and induces apoptosis of Kupffer cells. Inhibition of p65NF-kappaB/RelA attenuates elastase-induced upregulation of proapoptotic pathways and apoptosis in Kupffer cells. The ability of Kupffer cells to autoregulate their stress response by inducing self-apoptosis warrants further investigation.

Predictive factors of thromboembolic events in patients undergoing Roux-en-Y gastric bypass.

BACKGROUND: Obesity is a major risk factor for postoperative deep venous thrombosis (DVT) and pulmonary embolism (PE). Identifying those patients at the greatest risk for DVT/PE is essential to prevent thromboembolic events among patients undergoing Roux-en-Y gastric bypass (RYGB) for clinically significant obesity. This aim of the study is to identify factors associated with an increased likelihood of developing DVT/PE after RYGB. METHODS: Prospectively collected data from 660 consecutive patients who underwent RYGB were reviewed. Patients received perioperative prophylaxis with low molecular weight heparin and sequential compression devices. Diagnosis was based on clinical, radiologic, and/or necropsy findings. Patients with and without postoperative DVT/PE were compared using chi(2) and multivariate logistic regression analysis. RESULTS: A total of 23 patients (3.5%) developed postoperative DVT/PE. Age > 50 years (P = .04), previous DVT/PE (P = .02), history of smoking (P < .01), revisional operation (P = .03), open RYGB (P = .02), and anastomotic leak (P < .0001) significantly increased the likelihood of developing DVT/PE. On the other hand, gender, body mass index > 50 kg/m(2) and history of sleep apnea, hypertension, diabetes, or myocardial infarction did not increase the likelihood of DVT/PE. Multivariate analysis revealed that age > 50 years (P = .04), postoperative anastomotic leak (P < .001), smoking (P < .01), and previous DVT/PE (P < .001) increased the likelihood of postoperative DVT/PE. CONCLUSIONS: Age > 50 years, anastomotic leak, smoking, and history of DVT/PE all increase the likelihood of postoperative thromboembolic events in patients undergoing RYGB. Further preoperative screening and/or postoperative prophylaxis may be needed in this subset of high-risk patients.

Spectrum and treatment of small bowel obstruction after Roux-en-Y gastric bypass.

BACKGROUND: Small bowel obstruction (SBO) is a well-recognized complication of bariatric surgery. Many factors that play a role in the etiology of SBO affect the presentation, timing, and treatment after Roux-en-Y gastric bypass (RYGB). We reviewed our experience with SBO after open and laparoscopic RYGB. METHODS: We reviewed prospectively collected data from 784 consecutive patients who had undergone RYGB (458 open and 326 laparoscopic) from July 1998 to March 2005. The operative techniques were standardized, including closure of the mesenteric defects. The follow-up data were taken from clinic visit records and follow-up questionnaires. The mean follow-up period was 16 +/- 1 months (range 1-75). The data presented are the mean +/- SEM. RESULTS: The overall incidence of SBO after RYGB was 3.2%. Thirteen patients developed SBO after laparoscopic RYGB (4%) and 12 patients did so after open RYGB (2.6%, P = NS). Obstruction at the jejunojejunostomy was more common after laparoscopic RYGB (77%, P <.05), and adhesive SBO was more common after open RYGB (50%, P <.05). The incidence of SBO from internal hernia was low, regardless of the operative approach (open 0.7% versus laparoscopic 0.3%). Early SBO resolved with nonoperative treatment in 30% of patients. CONCLUSION: Understanding the anatomic considerations of RYGB in the development of SBO after open and laparoscopic approach is essential to timely and effective treatment.

Operative technique for converting a failed vertical banded gastroplasty to Roux-en-Y gastric bypass.

BACKGROUND: Bariatric surgeons are increasingly encountering patients with failed weight-loss operations. Conversion from vertical banded gastroplasty (VBG) to Roux-en-Y gastric bypass (RYGB) is the most common revisional operation in our practice. We reviewed our experience in converting from VBG to RYGB using a basic five-step surgical technique. STUDY DESIGN: We reviewed data on all patients undergoing revisional surgery for failed VBG, defined as patients with body mass index >/=35 kg/m(2), weight gain, poor control of comorbidities, staple-line dehiscence, or band-specific complications. The five basic steps include identification of the band, delineation of the extent of the pouch, division of the stomach, preparation of the Roux limb, and completion of the cardiojejunostomy. RESULTS: We have undertaken 28 conversions from VBG to RYGB. Median age was 51 years (range 27 to 65 years), preoperative body mass index was 40 kg/m(2) (range 20 to 58 kg/m(2)), and 25 patients (89%) were women. Indications for revision were band-related complications (13 patients), staple-line disruption (9 patients), and inadequate weight loss (6 patients). Median operative time was 185 minutes (range 105 to 465 minutes), estimated blood loss was 450 mL (range 100 to 2,500 mL), postoperative complications occurred in 6 patients (21%), and length of hospitalization was 5 days (range 3 to 69 days). Median postoperative body mass index was 32 kg/m(2) (range 20 to 41 kg/m(2)) at a followup time of 16 months (range 1 to 32 months). CONCLUSIONS: The technique described facilitates the operative approach to patients with failed VBG, providing guidelines for safe dissection and division of the gastric pouch for conversion to RYGB. Revisional bariatric operations are technically difficult and are associated with relatively higher complication rates than those reported for primary operations.

Fas/FasL play a central role in pancreatitis-induced hepatocyte apoptosis.

Liver injury is a clinical prognostic indicator in acute pancreatitis (AP). We have demonstrated that Kupffer cell-derived FasL mediates liver injury during AP and sought to determine its role in AP-induced hepatocyte apoptosis. AP was induced in National Institutes of Health (NIH) Swiss mice, C57/C57, and Fas-/-, FasL-/- mice by a choline-deficient ethionine-supplement diet. Liver Fas, FasL, p38-mitogen activated phosphokinase (p38-MAPK), poly-ADP ribose polymerase (PARP), and cytochrome C were measured by immunoblotting. Apoptosis was assessed by terminal deoxynucleotidyl transferase biotin-dUTP nick end labeling (TUNEL) and DNA fragmentation (ELISA). AP upregulated liver FasL (4280 +/- 580 vs. 733 +/- 336), Fas (2866 +/- 595 vs. 649 +/- 111), cytochrome C (6980 +/- 237 vs. 903 +/- 156), and PARP (6393 +/- 591 vs. 466 +/- 261) as well as increased TUNEL staining (40 +/- 2 vs. 14 +/- 1) and DNA fragmentation (all P < 0.03 vs. control). In FasL-/- and Fas-/- mice, AP-induced upregulation of p38-MAPK, PARP, and cytochrome C was significantly attenuated (all P < 0.01 compared to C57/C57 control). In addition, AP-induced DNA fragmentation was reduced 60% in Fas-/- and FasL-/- mice (P < 0.01 vs. C57/C57). AP induces apoptosis by transcriptional activation of Fas/FasL. AP-induced apoptosis was significantly reduced in Fas and FasL knockout mice along with downregulation of p38-MAPK, PARP, and cytochrome C, thereby suggesting a central role for Fas/FasL in hepatocyte apoptosis. The manipulation of interactions between Kupffer cell-derived FasL and hepatocytes may have important therapeutic implications.

Amelioration of gastroesophageal reflux symptoms following Roux-en-Y gastric bypass for clinically significant obesity.

Symptoms of gastroesophageal reflux disease (GERD) are frequent in patients with clinically significant obesity and are reported to improve after Roux-en-Y gastric bypass (RYGB). The purpose of this study is to determine timing and duration of improvement of GERD symptoms in patients undergoing RYGB. Prospectively collected data from patients who underwent RYGB from January 1998 to August 2004 were analyzed. Patients answered a standardized questionnaire pre- and postoperatively inquiring about frequency of GERD symptoms (none, one episode/ week, one episode/day, more than one episode/day) and medication use. Of 606 patients undergoing RYGB, 239 patients (39%) reported GERD symptoms preoperatively (mean age 43 +/- 1 years; body mass index 51 +/- 1 kg/m2). Of these, 89 per cent of patients reported improved at 3 months post-op and 94 per cent of patients 9 months post-op (P < 0.001). Medication usage decreased from 30 per cent to 3 per cent by 3 months and 5 per cent beyond 9 months (P < 0.001). Percentage of excess weight loss was 18 +/- 1 per cent and 75 +/- 2 per cent at 3 and 9 months, respectively. Symptoms of GERD significantly improve and use of antireflux medications is reduced after RYGB independent of weight loss. RYGB may be the treatment of choice for GERD in obese patients.

Anastomotic leaks after laparoscopic gastric bypass.

The gastrojejunostomy may be the most technically challenging step when performing laparoscopic Roux-en-Y gastric bypass. Patients who develop anastomotic leaks have increased morbidity and mortality rates. Difficulty in diagnosis is related to nonspecific systemic symptoms and limitations in most radiological studies. Our aim is to evaluate the incidence, etiology, diagnosis, management, and prevention of anastomotic leaks occurring in patients undergoing laparoscopic Roux-en-Y gastric bypass.

Who should be doing laparoscopic bariatric surgery?

BACKGROUND: The training and credentialing of surgeons for laparoscopic bariatric surgery is controversial. We sought to determine if there is an association between surgeons' practice and choice of open or laparoscopic bariatric surgery. METHODS: Members of the ASBS were surveyed via email. Associations were tested with Cochran-Mantel-Haenszel or Pearson's chi-square. RESULTS: 104/472 members responded; 65% were in private practice; 47% did 1-5 operations/week, 48% offered open procedures only, and 76% undertook gastric bypass. Respondents believe that laparoscopic procedures: should mimic open ones (77%), are safe (63%), should be evaluated by clinical trials (48%), and that expertise in bariatric surgery is more important than laparoscopic experience. 75% believe that courses and preceptorships are important. Regarding laparoscopic operations, surgeons doing only open procedures believe that: 1) the ASBS should be the main credentialing body; 2) surgeons should do > 25 open before laparoscopic ones; and 3) clinical trials are needed (P < 0.02, all). Surgeons with laparoscopic training or practices believe that laparoscopic surgery is safe and effective (P < 0.002). Both laparoscopic and open surgeons believe bariatric surgeons should be the only surgeons doing laparoscopic bariatric procedures (P < 0.008). CONCLUSIONS: There is consensus that laparoscopic bariatric surgery should be undertaken only by surgeons with strong interest in bariatric surgery. Laparoscopic bariatric surgeons should incorporate lessons learned from open surgery. Both laparoscopic and open bariatric surgeons should seek added expertise via courses and preceptorships. The skepticism of surgeons with 'open' practices could be addressed by clinical trials. The ASBS should maintain its leadership position and foster emerging technologies.

Management of incidental ovarian tumors in patients undergoing gastric bypass.

BACKGROUND: Ovarian disease is common in obese women and is usually not screened during routine preoperative evaluation in patients undergoing bariatric surgery. Consequently, surgeons may encounter previously undiagnosed adnexal tumors during bariatric operations. The aim of this study is to report our experience with incidental ovarian tumors in patients during Roux-en-Y gastric bypass (RYGBP). METHODS: Prospectively collected data on all consecutive patients undergoing RYGBP for clinically significant obesity from July 1998 to September 2003 were reviewed for patients with incidental gynecological tumors. Details of operative treatment and outcomes are reported herein. RESULTS: 460 women underwent RYGBP during the study period. 52 (11%) had a previous hysterectomy and/or bilateral oophorectomy and were excluded from the study. 12 ovarian masses, median tumor size 11 cm (range 4-65 cm) were found in 10 women (2.5%) during 6 open and 4 laparoscopic RYGBPs. Mean age was 40+/-9 years and mean BMI was 58+/-12 kg/m(2). Resection of 9 benign cystic lesions and 2 malignant lesions was undertaken. One patient with polycystic ovary syndrome did not undergo resection. The RYGBP was completed in all but 2 patients who, by appearance and intraoperative frozen biopsy, had evidence of malignancy. No additional morbidity resulted from the added gynecological procedure. Based on these results, an algorithm for the treatment of incidental gynecological tumors is suggested. CONCLUSIONS: Although infrequent, incidental ovarian tumors may be discovered in patients undergoing bariatric surgery, emphasizing the importance of thorough exploration of the abdominal cavity. Consultation with a gynecologist is warranted in most instances, and treatment should be on a patient-by-patient basis, especially in women of child-bearing age.

Gastric bypass is an effective treatment for obstructive sleep apnea in patients with clinically significant obesity.

BACKGROUND: We have demonstrated that obstructive sleep apnea (OSA) is prevalent in 60% of patients undergoing bariatric surgery. A study was conducted to determine whether weight loss following bariatric surgery ameliorates OSA. METHODS: All 100 consecutive patients with symptoms of OSA were prospectively evaluated by polysomnography before gastric bypass. Preoperative and postoperative scores of Epworth Sleepiness Scale (ESS), Respiratory Disturbance Index (RDI), and other parameters of sleep quality were compared using t-test. RESULTS: Preoperative RDI was 40 +/- 4 (normal 5 events/hour, n = 100). 13 patients had no OSA, 29 had mild OSA, while the remaining 58 patients were treated preoperatively for moderate-severe OSA. At a median of 6 months follow-up, BMI and ESS scores improved (38 +/- 1 vs 54 +/- 1 kg/m2, 6 +/- 1 vs 12 +/- 0.1, P < 0.001, postoperatively vs preoperatively). To date, 11 patients have completed postoperative polysomnography (3-21 months) after losing weight (BMI 40 +/- 2 vs 62 +/- 3 kg/m2, P < 0.001). There was significant improvement in ESS (3 +/- 1 vs 14 +/- 2), minimum O2 saturation (SpO2 86 +/- 2 vs 77 +/- 5), sleep efficiency (85 +/- 2% vs 65 +/- 5%), all P < 0.001, postop vs preop; and RDI (56 +/- 13 vs 23 +/- 7, P = 0.041). Regression analysis demonstrated no correlation between preoperative BMI, ESS score and the severity of OSA; and no correlation between % excess body weight loss and postoperative RDI. CONCLUSION: Weight loss following gastric bypass results in profound improvement in OSA. The severity of apnea cannot be reliably predicted by preoperative BMI and ESS; therefore, patients with symptoms of OSA should undergo polysomnography.