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Featured researches published by Marcus Fluck.


Journal of Trauma-injury Infection and Critical Care | 2016

Severe complicated Clostridium difficile infection: Can the UPMC proposed scoring system predict the need for surgery?

Michelle Julien; Jeffrey Wild; Joseph Blansfield; Mohsen Shabahang; Kristen Halm; Paul Meade; James Dove; Marcus Fluck; Marie A. Hunsinger; Diane Leonard

INTRODUCTION Clostridium difficile infection (CDI) is one of the most common health care–associated infections, and it continues to have significant morbidity and mortality. The onset of fulminant colitis often requires total abdominal colectomy with ileostomy, which has a mortality rate of 35% to 57%. University of Pittsburgh Medical Center (UPMC) developed a scoring system for severity and recommended surgical consultation for severe complicated disease. The aim of this study was to evaluate if the UPMC-proposed scoring system for severe complicated CDI can predict the need for surgical intervention. METHODS This is a retrospective review of all patients who developed severe complicated CDI at Geisinger Medical Center between January 2007 and December 2012 as defined by the UPMC scoring system. Main outcomes were the need for surgical intervention and 30-day mortality. RESULTS Eighty-eight patients had severe complicated CDI based on the UPMC scoring system. Fifty-nine patients (67%) required surgery and 29 did not. All patients had a diagnosis of CDI as shown by positive toxin assays. There was no difference between the groups with respect to age, sex, body mass index, or comorbidities. When comparing the surgical group to the nonsurgical cohort, the surgical cohort averaged 20 points on the scoring system compared to 9 in the nonoperative cohort. In patients with severe complicated CDI, 15 or more points predicted the need for surgery 75% of the time. Forty-two percent of the surgical cohort had respiratory failure requiring mechanical ventilation compared to 0% in the nonsurgical cohort (p < 0.0001). Forty-nine percent of the surgical cohort required vasopressors for septic shock before surgery compared to 0% in the nonsurgical cohort (p < 0.0001). Acute kidney injury was present in 92% of the surgical cohort versus 72% within the nonsurgical cohort (p = 0.026). Seventy-six percent of the surgical patients were admitted to the ICU before surgery. Within the nonsurgical cohort, only 24% of patients required ICU stay during admission. Overall, 30-day mortality in the surgical cohort was 30%, and there was no mortality in the nonsurgical cohort. CONCLUSIONS The UPMC scoring system for severe complicated CDI can help us predict patients who need a surgical consult and the need for surgical intervention. In patients with severe complicated CDI, evidence of end-organ failure predicts surgical intervention. LEVEL OF EVIDENCE Prognostic study, level III; therapeutic study, level IV.


Journal of Surgical Education | 2017

Characterizing the Relationship Between Surgical Resident and Faculty Perceptions of Autonomy in the Operating Room

Katelyn A. Young; Samantha M. Lane; John E. Widger; Nina Neuhaus; James Dove; Marcus Fluck; Marie A. Hunsinger; Joseph A. Blansfield; Mohsen Shabahang

OBJECTIVE Characterize the concordance among faculty and resident perceptions of surgical case complexity, resident technical performance, and autonomy in a diverse sample of general surgery procedures using case-specific evaluations. DESIGN A prospective study was conducted in which a faculty surgeon and surgical resident independently completed a postoperative assessment examining case complexity, resident operative performance (Milestone assessment) and autonomy (Zwisch model). Pearson correlation coefficients (r) reaching statistical significance (p < 0.05) were further classified as moderate (r ≥ 0.40), strong (r ≥ 0.60), or very strong (r ≥ 0.80). SETTING This study was conducted in the General Surgery Residency Program at an academic tertiary care facility (Geisinger Medical Center, Danville, PA). PARTICIPANTS Participants included 6 faculty surgeons, in addition to 5 postgraduate year (PGY) 1, 6 midlevel (PGY 2-3), and 4 chief (PGY 4-5) residents. RESULTS In total, 75 surgical cases were analyzed. Midlevel residents accounted for the highest number of cases (35, 46.6%). Overall, faculty and resident perceptions of case complexity demonstrated a strong correlation (r = 0.76, p < 0.0001). Technical performance scores were also strongly correlated (r = 0.66, p < 0.0001), whereas perceptions of autonomy demonstrated a moderate correlation (r = 0.56, p < 0.0001). Subgroup analysis revealed very strong correlations among faculty perceptions of case complexity and the perceptions of PGY 1 (r = 0.80, p < 0.0001) and chief residents (r = 0.82, p < 0.0001). All other intergroup correlations were strong with 2 notable exceptions as follows: midlevel and chief residents failed to correlate with faculty perceptions of autonomy and operative performance, respectively. CONCLUSIONS General surgery residents generally demonstrated high correlations with faculty perceptions of case complexity, technical performance, and operative autonomy. This generalized accord supports the use of the Milestone and Zwisch assessments in residency programs. However, discordance among perceptions of midlevel resident autonomy and chief resident operative performance suggests that these trainees may need more direct communication from the faculty.


Journal of Surgical Education | 2017

Ten Year Projections for US Residency Positions: Will There be Enough Positions to Accommodate the Growing Number of U.S. Medical School Graduates?

Sarah Hayek; Samantha M. Lane; Marcus Fluck; Marie A. Hunsinger; Joseph A. Blansfield; Mohsen Shabahang

OBJECTIVE Recently, a multitude of new U.S. medical schools have been established and existing medical schools have expanded their enrollments. The National Residency Match Program (NRMP) reports that in 2016 there were 23,339 categorical residency positions offered in the match and 26,836 overall applicants with 17,789 (66.29%) of the total candidates being U.S. allopathic graduates. In view of the rapid growth of medical school graduates, the aim of this study is to determine if current trends suggest a shortage of residency positions within the next ten years. DESIGN The total number of graduates from U.S. medical schools was obtained from the Association of American Medical Colleges (AAMC) for 2005-2014 academic years and was trended linearly for a 10-year prediction for the number of graduates. The yearly number of categorical positions filled by U.S. graduates for calendar years 2006-2015 was obtained from the NRMP and was trended longitudinally 10 years into the future. Analysis of subspecialty data focused on the comparison of differences in growth rates and potential foreseeable deficits in available categorical positions in U.S. residency programs. RESULTS According to trended data from AAMC, the total number of graduates from U.S. medical schools has increased 1.52 percent annually (15,927 in 2005 to 18,705 in 2014); with a forecast of 22,280 U.S. medical school graduates in 2026. The growth rate of all categorical positions available in U.S. residency programs was 2.55 percent annually, predicting 29,880 positions available in 2026. In view of these results, an analysis of specific residencies was done to determine potential shortages in specific residencies. With 17.4 percent of all U.S. graduates matching into internal medicine and a 3.17 percent growth rate in residency positions, in 2026 the number of internal medicine residency positions will be 9,026 with 3,874 U.S. graduates predicted to match into these positions. In general surgery, residency positions note a growth rate of 1.55 percent. Of all U.S. graduates, 5.6 percent match into general surgery. Overall this projects 1,445 general surgery residency positions in 2026 with 1,257 U.S. graduates matching. In orthopedics with a growth rate of 1.35 percent and a match rate of 3.75 percent, there are projected to be 827 positions available with 836 U.S. graduates projected to match. CONCLUSIONS Despite the increasing number of medical school graduates, our model suggests the rate of growth of residency positions continues to be higher than the rate of growth of U.S. medical school graduates. While there is no apparent shortage of categorical positions overall, highly competitive subspecialties like orthopedics may develop a shortage within the next ten years.


Obesity Surgery | 2018

Multimodal Postoperative Pain Control Is Effective and Reduces Opioid Use After Laparoscopic Roux-en-Y Gastric Bypass

Ryan D. Horsley; Ellen Vogels; Daaron McField; David M. Parker; Charles Medico; James Dove; Marcus Fluck; Jon Gabrielsen; Michael R. Gionfriddo; Anthony Petrick

BackgroundOpioids have been the mainstay for postoperative pain relief for many decades. Recently, opioid-related adverse events and death have been linked to postoperative dependency. Multimodal approaches to postoperative pain control may be part of the solution to this health care crisis. The safety and effectiveness of multimodal pain control regimens after laparoscopic Roux-en-Y gastric bypass (LRYGB) has not been well studied. The primary aim of our study was to determine if an evidence-based, multimodal pain regimen during hospitalization could decrease the total oral morphine equivalent (TME) use after LRYGB.Study DesignWe conducted a retrospective cohort study comparing outcomes prior to the implementation of a multimodal pain protocol (December 2010–December 2012) to those after implementation (April 2013–July 2015). The protocol utilized oral celecoxib and scheduled oral acetaminophen for pain control, with opioids used only as needed for breakthrough pain. Data was extracted from an electronic medical record and an institutionally maintained database of all patients undergoing bariatric surgery at a single center.ResultsCompared to controls, the multimodal pain regimen significantly reduced TME used and maximum pain scores with no change in mean pain scores. Multimodal pain protocol patients had a shorter length of stay with no increase in bleeding complications or marginal ulcer rates.ConclusionsAn opioid-sparing multimodal pain regimen adequately controls pain while reducing TME use. The regimen appears to be safe and was associated with a reduced length of stay in patients undergoing LRYGB.


Journal of Robotic Surgery | 2018

Laparoscopic versus robotic adrenalectomy: a review of the national inpatient sample

Sarah Samreen; Marcus Fluck; Marie A. Hunsinger; Jeffrey Wild; Mohsen Shabahang; Joseph A. Blansfield

BackgroundLaparoscopic adrenalectomy (LA) has become the standard treatment of adrenal lesions. Recently, robotic-assisted adrenalectomy (RA) has become an option, however, short-term outcomes for RA have not been well studied and benefits over LA are debatable. The aim of this study was to explore differences in short-term outcomes between LA and RA using the national inpatient sample (NIS) database.MethodsPatient data were collected from the NIS. All patients undergoing LA or RA from January 2009 to December 2012 were included. Univariate analysis and propensity matching were performed to look for differences between the groups.ResultsA total of 1006 patients (66.4% in LA group and 33.6% in RA group) were identified. Patient age group, gender, race, risk of mortality, severity of illness or indication for adrenalectomy did not differ significantly between the LA or RA cohorts. Insurance type predicted procedure type (45% of medicare patients underwent RA versus 29% of patients with private insurance, p < 0.0001). Patients living in the highest income areas were more likely to receive the laparoscopic approach (31.7 versus 17.4%, p < 0.0001). Hospital volume, bed size and teaching status of the hospital were not significant factors in the decision of RA versus LA. There was no difference in complication and conversion rates between RA versus LA. The mean length of stay was shorter in the RA group (2.2 versus 1.9 days, p = 0.03). Total charges were higher in the RA group (


Journal of Gastrointestinal Surgery | 2018

Analyzing the Impact of Compliance with National Guidelines for Pancreatic Cancer Care Using the National Cancer Database

Kathryn Jaap; Marcus Fluck; Marie A. Hunsinger; Jeffrey Wild; Tania K. Arora; Mohsen Shabahang; Joseph A. Blansfield

42,659 versus


American Journal of Surgery | 2017

Outcomes of complicated appendicitis: Is conservative management as smooth as it seems?

Katelyn A. Young; Nina Neuhaus; Marcus Fluck; Joseph A. Blansfield; Marie A. Hunsinger; Mohsen Shabahang; Denise Torres; Kenneth A. Widom; Jeffrey Wild

33,748, p < 0.0001). There was a significant trend towards more adrenalectomies being performed robotic assisted by year. Only 22% of adrenalectomies were performed robotic-assisted in 2009 compared with 48% in 2012.ConclusionsThe overall benefit for RA remains small and higher total charges for RA may currently outweigh the benefits. These findings may change as more cases are performed robotically assisted and robotic technology improves.


Surgery for Obesity and Related Diseases | 2015

Primary Repair of Ventral Hernia During Initial Laparoscopic Bariatric Surgery Results in Very Low Long Term Recurrence Rates

Piotr Krecioch; Thomas Shin; Marie A. Hunsinger; Matthew Plank; James Dove; Marcus Fluck; Anthony Petrick; Jon Gabrielsen

ImportanceManagement of pancreatic cancer is complex, requiring coordination of multiple providers. National Comprehensive Cancer Network guidelines, developed for standardization and quality improvement, recommend a multimodal approach.ObjectiveThis study analyzed national rates of compliance with National Comprehensive Cancer Network recommendations, assessed factors affecting compliance, and evaluated whether compliance with evidence-based guidelines improved overall survival.DesignThis is a retrospective review of adults diagnosed with pancreatic cancer entered into the National Cancer Database. Patients included had stage I and II pancreatic cancer, and complete data in the database. Patients were classified as compliant if they underwent both surgery and a second treatment modality (chemotherapy, radiation, or chemoradiation). Clinico-pathologic variables were analyzed using univariate and multivariate models to predict overall survival.SettingHospital-based national study population.ParticipantsPatients with stage I or II pancreatic cancer.Main Outcomes and MeasuresCompliance with National Comprehensive Cancer Network recommendations, factors affecting compliance, and overall survival based on compliance.ResultsA total of 52,450 patients were included; 19,272 patients (37%) were compliant. Patients were found to be most compliant in the 50–59-year-old range (49% complaint), with decreased compliance at the extremes of age. Male patients were more compliant than female patients (39 vs 34%, p < 0.0001). Caucasians were more compliant (39%) than African Americans (32%) or other races (32%, p < 0.0001). Patients treated at academic/research centers were more compliant than patients treated at other facilities (39% compliant, p < 0.0001). Patients with stage II disease were more compliant compared with stage I disease (43 vs 18%, p < 0.0001). Compliance was shown to improve overall survival (p < 0.0001).ConclusionAdherence to National Comprehensive Cancer Network guidelines for pancreatic cancer patients improves survival. Compliance nationwide is low, especially for older patients and minorities and those treated outside academic centers. More studies will need to be performed to identify factors that hinder compliance.


Plastic and reconstructive surgery. Global open | 2018

Abstract: Comparing the Surgical Outcomes of Prophylactic and Therapeutic Mastectomies with Immediate Reconstruction

Claire I. Lauer; Thomas Brouse; Marcus Fluck; Joseph A. Blansfield; Kaitlyn A. Young; Marie A. Hunsinger; James Dove; Thomas Bitterly; Christian Kauffman; Tania K. Arora; Joseph G. DeSantis


Journal of The American College of Surgeons | 2018

Robotic vs Laparoscopic Surgery for Rectal Cancer: A Look at the Nationwide Inpatient Sample Database

Mark A. Jayanathan; Marcus Fluck; Kevin C. Long; Christopher J. Buzas; Kristen Halm; Mohsen Shabahang; Tania K. Arora; Joseph A. Blansfield

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James Dove

Geisinger Medical Center

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Jon Gabrielsen

Geisinger Medical Center

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Jeffrey Wild

Geisinger Medical Center

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Tania K. Arora

Geisinger Medical Center

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