Introducing a Bariatric Surgery Program at a Large Urban Safety Net Medical Center Serving a Primarily Hispanic Patient Population

Utilization and Outcomes of Roux-en-Y Gastric Bypass Surgery Following the Affordable Care Act in the United States

BACKGROUND

The passage of the Affordable Care Act (ACA) in 2010 marked a pivotal moment in American health care policy, significantly expanding access to health care services. This study aims to explore the relationship between the ACA and the utilization and outcomes of Roux-en-Y Gastric Bypass (RYGB) surgery.

METHODS

Using data from the National Inpatient Sample (NIS) Database, this retrospective study compares the pre-ACA period (2007-2009) with the post-ACA period (2017-2019), encompassing patients who had RYGB. Multivariable logistic analysis was done accounting for patient's characteristics, comorbidities, and hospital type.

RESULTS

In the combined periods, there were 158 186 RYGB procedures performed, with 30.0% transpiring in pre-ACA and 70.0% in the post-ACA. Post-ACA, the proportion of uninsured patients decreased from 4.8% to 3.6% (P < .05), while Black patients increased from 12.5% to 18.5% (P < .05). Medicaid-insured patients increased from 6.8% to 18.1% (P < .05), and patients in the poorest income quartile increased from 20% to 26% (P < .05). Patients in the post-ACA period were less likely to have longer hospital stays (OR = .16: 95% CI .16-.17, P < .01), in-hospital mortality (OR = .29: 95% CI .18-.46, P < .01), surgical site infection (OR = .25: 95% CI .21-.29, P < .01), postop hemorrhage (OR = .24: 95% CI .21-.28, P < .01), and anastomotic leak (OR = .14: 95% CI .10-.18, P < .01) than those in the pre-ACA period.

DISCUSSION

Following the implementation of the ACA, utilization of bariatric surgery significantly increased, especially among Black patients, Medicaid beneficiaries, and low-income patients. Moreover, despite the inclusion of more high-risk surgical patients in the post-ACA period, there were better outcomes after surgery.

Cumulative Incidence of Venous Thromboembolic Events In-Hospital, and at 1, 3, 6, and 12 Months After Metabolic and Bariatric Surgery: Systematic Review of 87 Studies and Meta-analysis of 2,731,797 Patients

Systematic review/meta-analysis of cumulative incidences of venous thromboembolic events (VTE) after metabolic and bariatric surgery (MBS). Electronic databases were searched for original studies. Proportional meta-analysis assessed cumulative VTE incidences. (PROSPERO ID:CRD42020184529). A total of 3066 records, and 87 studies were included (N patients = 4,991,683). Pooled in-hospital VTE of mainly laparoscopic studies = 0.15% (95% CI = 0.13-0.18%); pooled cumulative incidence increased to 0.50% (95% CI = 0.33-0.70%); 0.51% (95% CI = 0.38-0.65%); 0.72% (95% CI = 0.13-1.52%); 0.78% (95% CI = 0-3.49%) at 30 days and 3, 6, and 12 months, respectively. Studies using predominantly open approach exhibited higher incidence than laparoscopic studies. Within the first month, 60% of VTE occurred after discharge. North American and earlier studies had higher incidence than non-North American and more recent studies. This study is the first to generate detailed estimates of the incidence and patterns of VTE after MBS over time. The incidence of VTE after MBS is low. Improved estimates and time variations of VTE require longer-term designs, non-aggregated reporting of characteristics, and must consider many factors and the use of data registries. Extended surveillance of VTE after MBS is required.

Portomesenteric Vein Thrombosis in Patients Undergoing Sleeve Gastrectomy: an Updated Systematic Review and Meta-Analysis of 101,914 Patients

INTRODUCTION

Portomesenteric vein thrombosis (PMVT) is a rare but potentially fatal complication of sleeve gastrectomy (SG). The rising prevalence of SG has led to a surge in the occurrence of PMVT, while the associated risk factors have not been fully elucidated. This study aims to determine the incidence and risk factors of PMVT in patients undergoing SG.

METHODS

A comprehensive literature search was performed in PubMed and EMBASE databases. Proportion and regression meta-analyses were conducted.

RESULTS

In a total of 76 studies including 101,914 patients undergoing SG, we identified 357 patients with PMVT. Mean follow-up was 14.4 (SD: 16.3) months. The incidence of PMVT was found to be 0.50% (95%CI: 0.40-0.61%). The majority of the population presented with abdominal pain (91.8%) at an average of 22.4 days postoperatively and PMVT was mainly diagnosed with computed tomography (CT) (96.0%). Hematologic abnormalities predisposing to thrombophilia were identified in 34.9% of the population. Advanced age (p=0.02) and low center volume (p <0.0001) were significantly associated with PMVT, while gender, BMI, hematologic abnormality, prior history of deep vein thrombosis or pulmonary embolism, type of prophylactic anticoagulation, and duration of prophylactic anticoagulation were not associated with the incidence of PMVT in meta-regression analyses. Treatment included therapeutic anticoagulation in 93.4% and the mortality rate was 4/357 (1.1%).

CONCLUSION

PMVT is a rare complication of sleeve gastrectomy with an incidence rate <1% that is associated with low center volume and advanced age but is not affected by the duration or type of thromboprophylaxis administered postoperatively.

Evaluating the Bariatric Safety Net: Analysis of Socioeconomic Factors and Outcomes at a Bariatric Safety Net Program Compared to an Affiliated Private Center

PURPOSE

Obesity is prevalent among economically disadvantaged and racially underrepresented populations. It has been suggested that socioeconomic factors, race, and lifestyle habits are important factors associated with weight loss and comorbidity remission after bariatric surgery. This study analyzes outcomes of bariatric surgery at a private hospital (PH) versus an affiliated safety-net hospital (SNH).

METHODS

Retrospective review of laparoscopic sleeve gastrectomies (LSG) performed by the same surgeons at a PH and SNH in a large metropolitan setting. Demographics, socioeconomic status, insurance status, weight metrics, and perioperative outcomes were compared. A postoperative telephone survey was conducted to study dietary and lifestyle differences between cohorts.

RESULTS

Of the 243 LSG performed, 141 (58%) occurred at PH versus 102 (42%) at SNH. Most patients at SNH were Hispanic, lower socioeconomic status, and had government-sponsored insurance. Based off the results from the postoperative telephone survey, there were no significant differences in dietary and lifestyle habits between both cohorts. Postoperative weight loss outcomes were similar across cohorts. The two groups had similar percent excess weight loss (EWL) at all time points up to 36 months and similar rates of failure to achieve 50% EWL at 12 months. However, patients at PH had greater resolution of diabetes and hypertension after surgery.

CONCLUSION

Our study demonstrates outcomes after bariatric surgery are similar at a PH and its affiliated SNH. Despite differences in race and socioeconomic factors between the two cohorts, perioperative outcomes, short-term postoperative weight loss, and weight loss failure rates were equivalent between SNH and PH patients.

Impact of a Body Mass Index Threshold on Abdominal Wall Hernia Repair at a Safety-Net Hospital

BACKGROUND

Body mass index (BMI) thresholds are utilized as a preoperative optimization strategy for obese patients prior to elective abdominal wall hernia repair. The objectives of this study were to determine the proportion of patients at our institution who ultimately underwent hernia repair after initial deferral due to BMI and to evaluate outcomes of those who required emergent repair during the deferral period.

METHODS

A retrospective review was performed from 2016 to 2018 to identify all patients with abdominal wall hernias who were deferred surgery due to BMI. Patient characteristics, hernia type, change in BMI, progression to surgery, acuity of surgery (elective or emergent), and postoperative outcomes were examined.

RESULTS

200 patients were deferred hernia repair due to BMI. Of these, 150 (75%) did not undergo repair over a mean period of 27 months. The remaining 50 patients ultimately underwent repair, 36 of which (72%) were elective and 14 (28%) emergent. The mean initial BMI of the elective group was 35.3 ± 1.8, compared to 39.1 ± 5.3 in the no surgery group and 40.6 ± 8.2 in the emergent group (P < .01). While the elective group lost weight before surgery, the other groups did not. Patients who required emergent surgery had worse outcomes than those repaired electively.

CONCLUSIONS

Preoperative weight loss is unsuccessful in most obese patients presenting for abdominal wall hernia repair at our institution. Patients who required emergent hernia repair had worse outcomes than those who underwent elective repair. Our institution's BMI threshold is a failed optimization strategy that needs to be reconsidered.