Expansion of Surgical Graduate Medical Education Training Programs: A Return on Investment Analysis.

BACKGROUND: The productivity of surgical departments is limited by the staffing of attending surgeons as well as surgical residents. Despite ongoing surgeon shortages, many health care organizations have been reluctant to expand training programs because of concerns about cost. We sought to determine the return on investment for the expansion of surgical training programs within our health system. METHODS: This study was completed as a retrospective review comparing two independent surgical departments at separate hospitals within a single integrated health system, including complete fiscal information from 2012 to 2019. Hospital A is a 594-bed hospital with large growth in its graduate surgical training programs over the study's period, whereas Hospital B is a 320-bed hospital where there was no expansion in surgical education initiatives. Case volumes, the number of full-time employees (FTE), and revenue data were obtained from our health systems business office. The number of surgical trainees, including general surgery residents and vascular surgery fellows, was provided by our office of Graduate Medical Education. The average yearly net revenue per surgeon was calculated for each training program and hospital location. RESULTS: Our results indicate a positive association between the number of surgical trainees and departmental net revenue, as well as the annual revenue generated per physician FTE. Each additional ancillary provider per physician FTE resulted in a positive impact of $112,552-$264,003 (R2 of 0.69 to 0.051). CONCLUSIONS: Regardless of hospital location or surgical specialty, our results demonstrate a positive association between the average net revenue generated per surgeon and the number of surgical trainees supporting the department. These findings are novel and provide evidence of a positive return on investment when surgical training programs are expanded.

Experimental active structural acoustic control of simply supported plates using a weighted sum of spatial gradients.

A limitation currently facing active structural acoustic control (ASAC) researchers is that an ideal minimization quantity for use in the control algorithms has not been developed. A novel parameter termed the "weighted sum of spatial gradients" (WSSG) was recently developed for use in ASAC and shown to effectively attenuate acoustic radiation from a vibrating flat simply supported plate in computer simulations. This paper extends this research from computer simulations and provides experimental test results. The results presented show that WSSG is a viable control quantity and provides better results than the volume velocity approach. The paper also investigates several of the challenges presented by the use of WSSG. These include determining a method to measure WSSG experimentally, an analysis of the influence of noise on WSSG control results and complications presented when degenerate modes exist. Results are shown and discussed for several experimental configurations.

Percutaneous occlusion of the left subclavian and celiac arteries before or during endograft repair of thoracic and thoracoabdominal aortic aneurysms with detachable nitinol vascular plugs.

PURPOSE: To review an experience with the Amplatzer vascular plug (AVP) for prevention of type II endoleaks during endovascular aneurysm repair (EVAR) of thoracic and thoracoabdominal aneurysms. MATERIALS AND METHODS: Retrospective review was undertaken of 14 patients undergoing transcatheter occlusion of the left subclavian (n = 12) or celiac artery (n = 2) with the AVP as part of EVAR of thoracic and thoracoabdominal aneurysms at a single institution. Procedural criteria evaluated were success at target vessel occlusion, the number of AVPs used, use of adjunctive embolization devices, and embolization-related ischemic end-organ events. Follow-up imaging criteria included evaluation of persistent target vessel occlusion, evidence of device migration, and the presence and characterization of endoleak secondary to AVP failure. RESULTS: Complete target vessel occlusion was documented for all cases. In six cases, more than one AVP was placed, with an average of 1.5 devices per patient. In two cases, adjunctive coils were placed. Computed tomographic or magnetic resonance angiography follow-up was available for all patients (mean follow-up, 419 days; range 28-930 d). No case showed evidence of device migration or type II endoleak resulting from AVP failure. There was a single instance of left subclavian artery recanalization without type II endoleak. There were no embolization-related ischemic end-organ events. CONCLUSIONS: Transcatheter arterial occlusion of the subclavian and celiac arteries with the AVP is a valuable adjunct to endografting in cases in which side branch embolization is necessary to extend the landing zone.