The deep abdominal ultrasound transducer (DAX) increases the success rate and diagnostic accuracy of shear wave elastography for liver fibrosis assessment in patients with obesity-A prospective biopsy-controlled study.

BACKGROUND: Obesity impacts the diagnostic accuracy of shear wave elastography (SWE). A deep abdominal ultrasound transducer (DAX) capable of point (pSWE) and two-dimensional (2D)-SWE has recently been introduced to address this issue. METHODS: We performed a prospective study in a cohort of mostly patients with obesity undergoing liver biopsy with a high prevalence of metabolic dysfunction-associate steatotic liver disease (MASLD). Liver stiffness measurement (LSM) was measured using vibration-controlled transient elastography (VCTE), as well as pSWE and 2D SWE on the standard (5C1) and the DAX transducers. RESULTS: We included 129 patients with paired LSM and liver biopsy: median age 44.0 years, 82 (63.6%) women, median BMI: 43.2 kg/m2. Histologic fibrosis stages: F0: N = 55 (42.6%), F1: N = 14 (10.9%), F2: N = 50 (38.8%), F3: N = 2 (1.6%), F4: N = 8 (6.2%). VCTE-LSM failed (N = 13) or were unreliable (IQR/median ≤30% in ≥7.1 kPa, N = 14) in 20.9% of patients. The Pearson correlation of reliable VCTE-LSM with both pSWE and 2D SWE was strong (all >0.78). The diagnostic accuracy for all LSM techniques was poor for significant fibrosis (≥F2, AUC: 0.54-0.63); however, it was good to excellent for advanced fibrosis (≥F3, AUC: 0.87-0.99) and cirrhosis (F4, AUC: 0.86-1.00). In intention-to-diagnose analysis, pSWE on DAX was significantly superior to VCTE-LSM. CONCLUSIONS: pSWE- and 2D-SWE enable the non-invasive identification of advanced fibrosis and cirrhosis in patients with obese MASLD. The use of the DAX transducer for acoustic radiation force imaging (ARFI)-LSM avoids technical failures in an obese population and subsequently offers advantages over VCTE-LSM for the evaluation of fibrosis in an obese MASLD population at risk for fibrosis.

The Impact of Adjuvant Radiotherapy on Immediate Prepectoral Implant-Based Breast Reconstruction.

BACKGROUND: Immediate prepectoral implant-based breast reconstruction (IBBR) rates have increased in recent years owing to improved cosmetic and psychological benefits. However, there is a lack of studies regarding complications rates following adjuvant radiotherapy (RT) among patients undergoing immediate prepectoral IBBR. METHODS: We conducted a retrospective monocentric analysis of a cohort of consecutively treated patients who underwent NSM following immediate prepectoral IBBR at our institution between March 2017 and November 2021. Patient demographics, quality of life, complication rates, and oncological safety were evaluated in the RT and non-RT groups. Data analysis was performed using IBM SPSS Version 24 (IMB Corp., Armonk, NY, USA). RESULTS: A total of 98 patients were examined: 70 were assigned to have prepectoral IBBR without RT and 28 to the group who had prepectoral IBBR with RT. There was a statistically significant difference in overall capsular contracture rate between the RT and non-RT group (18% vs. 4.3%, p=0.04). The total implant loss in the cohort was 4% (10.7% vs. 1.4%, p=0.05). We obtained a high percentages of all BREAST-Q categories in both groups; however, satisfaction with the breast and sexual well-being was higher in the non-RT group. The three-year overall survivals were 97.4% in the RT group and 98.5% in the non-RT group. CONCLUSION: Our findings showed that patients in the RT group had a higher rate of capsular contracture and implant loss than those in the non-RT group. However, complication rates were within acceptable range and with accurate preoperative information patients have more benefits from immediate reconstruction showing excellent overall quality of life irrespectively of radiation. LEVEL OF EVIDENCE III: This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266 .

Ptotic versus Nonptotic Breasts in Nipple-sparing Mastectomy and Immediate Prepectoral Breast Reconstruction.

In recent years, nipple-sparing mastectomy followed by implant-based breast reconstruction has gained popularity due to improved cosmetic and psychological benefits. However, patients with ptotic breasts remain the main challenge for surgeons, owing to the potential risk of postoperative complications. Methods: A retrospective chart review was performed for patients who underwent nipple-sparing mastectomy and prepectoral implant-based breast reconstruction between March 2017 and November 2021. Patient demographics, incidence of complications, and quality of life assessed using the BREAST-Q questionnaire were compared between the two different incisions [inverted-T for ptotic versus inframammary fold (IMF) for nonptotic breasts]. Results: A total of 98 patients were examined: 62 in the IMF cohort and 36 in the inverted-T cohort. The results demonstrated equivalence in the safety metrics between the two groups, including hematoma (p=0.367), seroma (p=0.552), infection (P = 1.00), skin necrosis (P = 1.00), local recurrence (P = 1.00), implant loss (P = 0.139), capsular contracture (P = 1.00), and nipple-areolar complex necrosis (P = 0.139). The BREAST-Q scores were equally high in both groups. Conclusion: Our results suggest that inverted-T incision for ptotic breasts is a safe modality with similar complication rates and high aesthetic results compared with IMF incision for nonptotic breasts. A higher rate of nipple-areolar complex necrosis in the inverted-T group, although not significant, should be considered during careful preoperative planning and patient selection.

The male patient with obesity undergoing metabolic and bariatric surgery: changes in testosterone levels correlate with weight loss after one-anastomosis gastric bypass and Roux-en-Y gastric bypass.

BACKGROUND: Male obesity secondary hypogonadism (MOSH) is a common disease among men with obesity and can be associated with metabolic syndrome and a variety of metabolic problems ultimately leading to androgen deficiency. Metabolic and bariatric surgery is a well-established treatment option associated with significant weight loss and reduction in metabolic co-morbidities. OBJECTIVES: To evaluate the impact of surgery on plasma levels of sexual hormones and their effect on weight loss comparing 2 surgical methods (one-anastomosis gastric bypass [OAGB] and Roux-en-Y gastric bypass [RYGB]) in male patients with obesity. SETTING: University hospital, Austria. METHODS: Patients undergoing OAGB and RYGB between 2012 and 2017 were analyzed retrospectively. Follow-up in this study was up to 24 months. Systemic levels of sexual hormones (luteinizing hormone [LH]), follicle stimulating hormone [FSH], total testosterone [TT], sexual hormone binding globin [SHBG], 17 beta-estradiol [17bE], androstenedione [AS]) were retrieved at each visit. A linear mixed model was used to assess the correlation between changes in testosterone levels and percent excess weight loss (%EWL). RESULTS: In 30.8% of all patients, MOSH was present preoperatively. A significant increase of TT was observed postoperatively that led to a complete resolution of hypogonadism within the period observed. Bioavailable testosterone (bTT) and FSH levels significantly increased each month of follow-up after surgery (all P < .01). Levels of 17bE did not change significantly after surgery. The overall change of TT, comparing preoperative and 1-year postoperative TT levels (ΔTT), significantly correlated with %EWL. Changes in TT levels were not affected by the choice of surgical method. CONCLUSIONS: Serum plasma testosterone levels rise significantly after metabolic and bariatric surgery in male patients. The change of testosterone levels seems to play a role in continued weight loss after surgery. This is true irrespective of the surgical method used.

Prepectoral Versus Subpectoral Implant-Based Breast Reconstruction: A Systemic Review and Meta-analysis.

BACKGROUND: Implant-based breast reconstruction (IBBR) remains the standard and most popular option for women undergoing breast reconstruction after mastectomy worldwide. Recently, prepectoral IBBR has resurged in popularity, despite limited data comparing prepectoral with subpectoral IBBR. METHODS: A systematic search of PubMed and Cochrane Library from January 1, 2011 to December 31, 2021, was performed following the Preferred Reporting Items for Systematic reviews and Meta-Analyses (PRISMA) reporting guidelines, data were extracted by independent reviewers. Studies that compared prepectoral with subpectoral IBBR for breast cancer were included. RESULTS: Overall, 15 studies with 3,101 patients were included in this meta-analysis. Our results showed that patients receiving prepectoral IBBR experienced fewer capsular contractures (odds ratio [OR], 0.54; 95% confidence interval [CI], 0.32-0.92; P = 0.02), animation deformity (OR, 0.02; 95% CI, 0.00-0.25; P = 0.002), and prosthesis failure (OR, 0.58; 95% CI, 0.42-0.80; P = 0.001). There was no significant difference between prepectoral and subpectoral IBBR in overall complications (OR, 0.83; 95% CI, 0.64-1.09; P = 0.19), seroma (OR, 1.21; 95% CI, 0.59-2.51; P = 0.60), hematoma (OR, 0.76; 95% CI, 0.49-1.18; P = 0.22), infection (OR, 0.87; 95% CI, 0.63-1.20; P = 0.39), skin flap necrosis (OR, 0.70; 95% CI, 0.45-1.08; P = 0.11), and recurrence (OR, 1.31; 95% CI, 0.52-3.39; P = 0.55). Similarly, no significant difference was found in Breast-Q scores between the prepectoral and subpectoral IBBR groups. CONCLUSIONS: The results of our systematic review and meta-analysis demonstrated that prepectoral, implant-based, breast reconstruction is a safe modality and has similar outcomes with significantly lower rates of capsular contracture, prosthesis failure, and animation deformity compared with subpectoral, implant-based, breast reconstruction.

Surgical Technique for Weight Regain after Roux-en-Y Gastric Bypass: Pouch-resizing and the MiniMIZER® Gastric Ring.

Laparoscopic Roux-en-Y Gastric Bypass (RYGB) is a commonly used method in bariatric surgery that leads to sufficient long-term weight loss and consequently to improvement or resolution of obesity-associated diseases. The nadir weight is commonly reached between six months and two years after surgery. Despite this initially good weight loss, weight regain is observed in up to 20% of the patients. Besides intensive dietological evaluation, bariatric re-operation can be an option in these cases. Before the surgical reintervention, an intensive evaluation of the esophagus, pouch, anastomosis, and adjacent small bowel using upper GI-endoscopy and radiological examinations (X-ray and/or 3D-CT volumetry) is mandatory. In patients with a dilated pouch, pouch-resizing with a MiniMIZER® Gastric Ring (Bariatric Solutions GmbH, Stein am Rhein, Switzerland) could be an option to reestablish restriction in the long term. Currently, there is no gold standard for the choice of the weight regain procedure or for the technique used in the procedure itself. This article focuses on the standardized procedure of pouch resizing with implantation of a MiniMIZER® Gastric Ring for the surgical therapy of weight regain due to pouch dilatation and/or dilatation of the gastrojejunostomy and the adjacent small bowel (usually approximately the first 20cm), resulting in a huge neo-stomach after RYGB, as performed at the Medical University of Vienna. Further, indications for revisional surgery for weight regain, mandatory examinations, and recommended conservative therapy options prior to surgery will be described. Next, the fast-track concept and its advantages are explained. Lastly, the surgical procedure, including positioning of the patient, placement of trocars, the intraoperative process, and special advice, is presented. Exact planning of the procedure and postoperative follow-up are indispensable for a further long-term success after weight regain surgery. In conclusion, pouch-resizing and implantation of the MiniMIZER® Gastric Ring represent a practical and effective solution in patients with dilated pouch/anastomosis/adjacent small bowel with weight regain after RYGB, if conservative therapy, including dietitian counseling and new drugs (e.g., Semaglutide), has failed.

Preoperative Phase Angle as a Risk Indicator in Cardiac Surgery-A Prospective Observational Study.

Background: The phase angle (PhA) can be used for prognostic assessments in critically ill patients. This study describes the perioperative course of PhA and associated risk indicators in a cohort of elective cardiac surgical patients. Methods: The PhA was measured in 168 patients once daily until postoperative day (POD) seven. Patients were split into two groups depending on their median preoperative PhA and analyzed for several clinical outcomes; logistic regression models were used. Results: The PhA decreased from preoperative (6.1° ± 1.9°) to a nadir on POD 2 (3.5° ± 2.5°, mean difference −2.6° (95% CI, −3.0°; −2.1°; p < 0.0001)). Patients with lower preoperative PhA were older (71.0 ± 9.1 vs. 60.9 ± 12.0 years; p < 0.0001) and frailer (3.1 ± 1.3 vs. 2.3 ± 1.1; p < 0.0001), needed more fluids (8388 ± 3168 vs. 7417 ± 2459 mL, p = 0.0287), and stayed longer in the ICU (3.7 ± 4.5 vs. 2.6 ± 3.8 days, p = 0.0182). Preoperative PhA was independently influenced by frailty (OR 0.77; 95% CI 0.61; 0.98; p = 0.0344) and cardiac function (OR 1.85; 95%CI 1.07; 3.19; p = 0.028), whereas the postoperative PhA decline was independently influenced by higher fluid balances (OR 0.86; 95% CI 0.75; 0.99; p = 0.0371) and longer cardiopulmonary bypass times (OR 0.99; 95% CI 0.98; 0.99; p = 0.0344). Conclusion: Perioperative PhA measurement is an easy-to-use bedside method that may critically influence risk evaluation for the outcome of cardiac surgery patients.

Surgical Technique of Single Anastomosis Duodeno-Ileal Bypass with Sleeve Gastrectomy (SADI-S).

Laparoscopic Single Anastomosis Duodeno-Ileal Bypass with Sleeve Gastrectomy (SADI-S) is a bariatric/metabolic procedure that has been gaining popularity in recent years. SADI-S strongly affects the secretion of various gut hormones, adipocytokines and incretins. From a mechanistic point of view, the operation combines malabsorption and restriction, and has been shown to have a long-lasting and significant impact on weight loss and remission of comorbidities. With regard to the technique, first, a Sleeve is created and then the duodenum is tran-sected approximately 3-4cm after the pylorus at the level of the gastroduodenal artery (GDA). Next, 250-300cm of small bowel is measured from the caecum and a hand-sewn duo-deno-ileal anastomosis is performed. The length of the biliopancreatic limb is variable in this procedure. Because of the standardized common limb length in all patients, weight loss is very precise within a low range. Nevertheless, due to the complex hand-sewn anastomosis and the delicacy necessary when handling the duodenum, this procedure should be reserved for experienced bariatric surgeons in specialized centers. This article provides an overview of the standard surgical technique at the Department of Visceral Surgery at the Medical University of Vienna, as well as information about patient selection and pre- and postoperative care.

Characteristics of Interleukin-6 Signaling in Elective Cardiac Surgery-A Prospective Cohort Study.

Interleukin-6 (IL-6) can cause pro- and anti-inflammatory effects via different signaling pathways. This prospective study investigated the perioperative kinetics of IL-6, soluble IL-6 receptor (sIL-6R), and soluble glycoprotein 130 (sgp130) in elective patients undergoing cardiopulmonary bypass (CPB). IL-6, sIL-6R, and sgp130 were measured simultaneously and consecutively at 19 timepoints until the 10th postoperative day (POD). The proportion of pro- and anti-inflammatory pathways were determined by calculating sIL-6R/IL-6 and sIL-6R/sgp130 ratios. We analyzed 93 patients. IL-6 increased during surgery with reaching a plateau two hours after CPB and peaking on POD 1 (188.5 pg mL-1 (IQR, 126.6; 309.2)). sIL-6R decreased at the beginning of the surgical procedure, reaching a nadir level on POD 2 (26,311 pg mL-1 (IQR, 22,222; 33,606)). sgp130 dropped immediately after CPB initiation (0.13 ng mL-1 (IQR, 0.12; 0.15)), followed by a continuous recovery until POD10. The sIL-6R/IL-6 ratio decreased substantially at the beginning of the procedure, reaching a nadir on POD 1 (149.7 (IQR, 82.4; 237.4)), while the sIL-6R/sgp130 ratio increased simultaneously until 6 h post CPB (0.219 (IQR 0.18; 0.27)). In conclusion, IL-6 exhibited high inter-individual variability reflecting an inhomogeneous inflammatory response. Pro-inflammatory effects and overwhelming inflammation were rare and predominantly anti-inflammatory effects were found.

Trends of Overweight and Obesity in Male Adolescents: Prevalence, Socioeconomic Status, and Impact on Cardiovascular Risk in a Central European Country.

BACKGROUND: Obesity is one of the most important health-related problems of the twenty-first century. Data on its prevalence in Austria remain scarce. Aim of this study was to determine current trends of overweight and obesity, associated comorbidities and socioeconomic status in all 18-year-old male Austrian citizens, and its potential impact on the demand for bariatric surgery in the future. METHODS: Data from compulsory military conscription examinations in all 18-year-old males from 2003 to 2018 were obtained from the Federal ministry of Defense's database. Measurements of height, weight, and subsequent body mass index (BMI) calculations in 874, 220 adolescents were subdivided into yearly cohorts. Comorbidities, educational status, and nicotine abuse were evaluated. RESULTS: Mean BMI increased from 22.0 ± 3.95 kg/m2 in 2003 to 22.8 ± 4.69 kg/m2 in 2018 (p < 0.001). Overweight and obesity °I-III increased from 15.3%, 4.2%, 1.2%, and 0.4% (2003) to 20.4%, 7.1%, 2.5%, and 0.8% (2018), respectively. Cardiovascular risk, reflected by the waist-to-height ratio, increased significantly over time (p < 0.0001). Additionally, data showed a significant association of nicotine abuse in overweight or obese adolescents (p < 0.0001). Significantly less adolescents with obesity graduated from high school (p < 0.0001). Overall, 25.7% of adolescents with obesity were considered ineligible for military service. CONCLUSIONS: BMI and cardiovascular risk steadily increased over the last 15 years in Austrian male adolescents. A significant shift from normal weight to overweight was observed, while higher obesity classes doubled over this observational period. This study also revealed a significant association of BMI and lower educational status. Trends of overweight and obesity in male adolescents: prevalence, socio-economic status and impact on cardiovascular risk in a central European country.

Conversion from one-anastomosis gastric bypass to Roux-en-Y gastric bypass: when and why-a single-center experience of all consecutive OAGB procedures.

BACKGROUND: One-anastomosis gastric bypass (OAGB) is a well-established treatment method in patients with morbid obesity. Its long-term impact on de novo reflux, anastomotic complications, and malnutrition needs further evaluation. Roux-en-Y gastric bypass (RYGB) is a technically feasible procedure in revisional bariatric surgery. This study presents our institutional data on conversion from OAGB to RYGB. OBJECTIVE: To determine the reasons for conversion, preoperative endoscopic findings, and feasibility of revisional bariatric surgery after OAGB. SETTING: University hospital in Austria METHODS: Retrospective analysis of a prospectively fed database. All patients undergoing OAGB between January 2012 and December 2019 were included. Screening was carried out for all patients needing conversion to RYGB. Percent total weight loss, percent excess weight loss, time to conversion, postoperative complications, and reasons for conversion were assessed. RESULTS: Eighty-two of 1,025 patients who underwent OAGB were converted laparoscopically to RYGB. Seven patients were converted early because of anastomotic/gastric tube leakage. Median time to late conversion was 29.1 ± 24.3 months, mean percent excess weight loss was 86.6% ± 33.1% and percent total weight loss was 35.1% ± 13.5%. Forty-two patients were converted because of reflux, 11 because of persistent marginal ulcers, 10 because of anastomotic stenosis, 9 because of malnutrition, and 3 because of weight regain. Seven patients showed Barrett's metaplasia in biopsies at the gastroesophageal junction before conversion. CONCLUSION: Laparoscopic conversion from OAGB to RYGB is technically feasible with a moderate rate of postoperative complications. Severe (bile) reflux is a serious long-term complication after OAGB, with 4.1% of patients needing conversion to RYGB. Endoscopy after OAGB in patients showing clinical symptoms of gastroesophageal reflux disease is strongly advised to detect underlying pathologic changes.

Bariatric Surgery-How Much Malabsorption Do We Need?-A Review of Various Limb Lengths in Different Gastric Bypass Procedures.

The number of obese individuals worldwide continues to increase every year, thus, the number of bariatric/metabolic operations performed is on a constant rise as well. Beside exclusively restrictive procedures, most of the bariatric operations have a more or less malabsorptive component. Several different bypass procedures exist alongside each other today and each type of bypass is performed using a distinct technique. Furthermore, the length of the bypassed intestine may differ as well. One might add that the operations are performed differently in different parts of the world and have been changing and evolving over time. This review evaluates the most frequently performed bariatric bypass procedures (and their variations) worldwide: Roux-en-Y Gastric Bypass, One-Anastomosis Gastric Bypass, Single-Anastomosis Duodeno-Ileal Bypass + Sleeve Gastrectomy, Biliopancreatic Diversion + Duodenal Switch and operations due to weight regain. The evaluation of the procedures and different limb lengths focusses on weight loss, remission of comorbidities and the risk of malnutrition and deficiencies. This narrative review does not aim at synthesizing quantitative data. Rather, it provides a summary of carefully selected, high-quality studies to serve as examples and to draw tentative conclusions on the effects of the bypass procedures mentioned above. In conclusion, it is important to carefully choose the procedure and small bowel length excluded from the food passage suited best to each individual patient. A balance has to be achieved between sufficient weight loss and remission of comorbidities, as well as a low risk of deficiencies and malnutrition. In any case, at least 300 cm of small bowel should always remain in the food stream to prevent the development of deficiencies and malnutrition.

Urinary neprilysin for early detection of acute kidney injury after cardiac surgery: A prospective observational study.

BACKGROUND: Acute kidney injury (AKI) predicts adverse outcomes after cardiac surgery. The accuracy of using changes in serum creatinine for diagnosis and grading of AKI is limited in the peri-operative cardiac surgical setting and AKI may be underdiagnosed due to haemodilution from cardiopulmonary bypass priming and the need for intra-operative and postoperative volume resuscitation. OBJECTIVES: To determine whether the urinary biomarker neprilysin can be used as a marker for the early detection of AKI after cardiac surgery. DESIGN: Prospective, observational cohort study. SETTING: Austrian tertiary referral centre. PATIENTS: 96 Patients undergoing elective cardiac surgery with cardiopulmonary bypass. MAIN OUTCOME MEASURES: Differences and discriminatory power of neprilysin levels early after cardiac surgery and on postoperative day 1 between patients with or without AKI, as defined by the Kidney Disease Improving Global Outcomes Group. RESULTS: AKI was found in 27% (n=26). The median neprilysin levels on postoperative day 1 were significantly higher in the AKI than in the non-AKI group, 4.0 [interquartile range (IQR): 2 to 6.25] vs. 2.0 ng ml [IQR: 1.0 to 4.5], P = 0.0246, respectively. In addition, the median neprilysin levels at the end of surgery were significantly different between both groups, 5.0 [IQR: 2.0 to 9.0] vs. 2.0 ng ml [IQR: 1.0 to 4.0], P = 0.0055, respectively. The discriminatory power of neprilysin for detecting early AKI corresponded to an area under the curve of 0.77 (95% confidence interval, 0.65 to 0.90). CONCLUSION: Urinary neprilysin has potential as a biomarker for the early detection of AKI after cardiac surgery and has comparable discriminatory power to recently studied AKI biomarkers. TRIAL REGISTRATION: The trial was registered at ClinicalTrials.gov (NCT03854825, https://clinicaltrials.gov/ct2/show/NCT03854825).