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Featured researches published by Andrés M. Bur.


Archives of Otolaryngology-head & Neck Surgery | 2016

Association of Clinical Risk Factors and Postoperative Complications With Unplanned Hospital Readmission After Head and Neck Cancer Surgery

Andrés M. Bur; Jason A. Brant; Carolyn L. Mulvey; Elizabeth A. Nicolli; Robert M. Brody; John P. Fischer; Steven B. Cannady; Jason G. Newman

Importance Unplanned hospital readmission is costly and in recent years has become a focus of health care legislation intended to reduce health care expenditures. Greater understanding of which perioperative complications are associated with hospital readmission after surgery for head and neck cancer is needed to reduce unplanned readmissions. Objective To determine which clinical risk factors and complications are associated with 30-day unplanned readmission after surgery for malignant neoplasms of the head and neck. Design, Setting, and Participants This retrospective longitudinal claims analysis included data from the American College of Surgeons National Surgical Quality Improvement Program (NSQIP) database from January 1, 2012, to December 31, 2014. Patients undergoing surgery for malignant tumors of the head and neck were included; those with a primary diagnosis of thyroid malignant disease and those undergoing free autologous tissue transfer were excluded. Main Outcomes and Measures Clinical risk factors and complications were analyzed for association with unplanned hospital readmission using multivariable regression analysis. Statistical significance was determined using P < .05. Results A total of 7605 patients (5007 men [65.8%]; mean [SD] age, 64.2 [0.2] years) were identified and included for analysis. Overall, 1472 complications occurred in 912 cases. Three hundred eighty-eight patients (5.1%) had an unplanned readmission, which was lower than the previously published overall readmission rate for noncardiac surgical procedures in the NSQIP (6.8%). Clinical factors that were independently associated with unplanned readmission were age (adjusted odds ratio [AOR], 1.12; 95% CI, 1.03-1.22), diabetes (AOR, 1.60; 95% CI, 1.01-2.43), preoperative dyspnea at rest (AOR, 2.89; 95% CI, 1.40-5.55) and with moderate exertion (AOR, 1.48; 95% CI, 1.01-2.11), long-term use of corticosteroids (AOR, 2.45; 95% CI, 1.63-3.58), disseminated cancer (AOR, 1.57; 95% CI, 1.14-2.20), and a contaminated wound (AOR, 2.05; 95% CI, 1.05-3.7). When specific complications were examined, superficial incisional surgical site infection (SSI) (AOR, 2.02; 95% CI, 1.14-3.40), deep incisional SSI (AOR, 2.57; 95% CI, 1.26-5.03), organ or space SSI (AOR, 13.27; 95% CI, 6.57-26.61), wound disruption (AOR, 3.58; 95% CI, 1.95-6.31), pneumonia (AOR, 3.39; 95% CI, 1.88-5.96), deep vein thrombosis (AOR, 5.60; 95% CI, 1.90-15.25), pulmonary embolism (AOR, 20.72; 95% CI, 7.86-55.68), urinary tract infection (AOR, 2.66; 95% CI, 1.00-6.34), stroke (AOR, 12.42; 95% CI, 3.99-36.50), sepsis (AOR, 2.64; 95% CI, 1.27-5.30), and septic shock (AOR, 4.12; 95% CI, 1.10-15.81) were all associated with 30-day unplanned hospital readmission. Conclusions and Relevance This study evaluated clinical factors and postoperative complications to determine which ones were associated with 30-day unplanned hospital readmission among patients undergoing surgery for malignant tumors of the head and neck. Further understanding of which complications are associated with unplanned readmission after head and neck surgery will allow for improved risk stratification and development of postoperative care protocols to reduce unplanned hospital readmission.


Head and Neck-journal for The Sciences and Specialties of The Head and Neck | 2016

Adjuvant radiotherapy for early head and neck squamous cell carcinoma with perineural invasion: A systematic review

Andrés M. Bur; Alexander Lin; Gregory S. Weinstein

Perineural invasion (PNI) is widely regarded as a negative prognostic factor in head and neck squamous cell carcinoma (HNSCC). Treatment guidelines recommend adjuvant radiotherapy (RT) for patients with adverse pathologic features, including PNI. The purpose of this study was to systematically review the literature to determine if patients with PNI as their only indication for adjuvant therapy benefit from adjuvant RT. In total, 339 abstracts were reviewed for relevance leaving 85 articles, which were evaluated in detail. Thirteen retrospective studies addressed the role of adjuvant RT for patients with PNI. Evidence is lacking to recommend adjuvant RT for all patients with HNSCC with PNI. However, the literature suggests that large nerve or multifocal PNI may predict worse outcome and may be a more appropriate indication for adjuvant therapy. We advocate that patients decide whether to undergo adjuvant therapy after a discussion of the limitations of current evidence.


Head and Neck-journal for The Sciences and Specialties of The Head and Neck | 2017

Use of free tissue transfer in head and neck cancer surgery and risk of overall and serious complication(s): An American College of Surgeons–National Surgical Quality Improvement Project analysis of free tissue transfer to the head and neck

Steven B. Cannady; Kyle M. Hatten; Andrés M. Bur; Jason A. Brant; John P. Fischer; Jason G. Newman; Ara A. Chalian

The purpose of this article was to assess the rates of head and neck free tissue transfer and variables available in the American College of Surgeons – National Surgical Quality Improvement Project (ACS–NSQIP) dataset to predict overall and serious complications.


Otolaryngology-Head and Neck Surgery | 2016

Reoperation following Adult Tonsillectomy Review of the American College of Surgeons National Surgical Quality Improvement Program

Jason A. Brant; Andrés M. Bur; Raymond L. Chai; Kyle Hatten; Elizabeth A. Nicolli; John P. Fischer; Steven B. Cannady

Objective Tonsillectomy remains a common procedure in adults; however, there are few population-level data evaluating risk factors for reoperation. Study Design Retrospective review of national database. Setting American College of Surgeons National Surgical Quality Improvement Program (ACS-NSQIP), 2005-2013. Subjects and Methods The ACS-NSQIP was queried for patients undergoing tonsillectomy ± adenoidectomy as their primary procedure (CPT 42821 or 42826). Demographic information and indications were reviewed along with complications and reoperation rates. Results In total, 12,542 cases met inclusion criteria. Patients were predominantly female (66.4%) and white (70.8%), with mean age of 30 ± 12 years (range: 16-90+). Thirty-day mortality was 0.03%, and 4.8% of patients experienced at least 1 complication, including reoperation (3.6%). Risk of complications was associated with male sex (P < .0001; odds ratio [OR], 1.7), diabetes (P = .0002; OR, 2.1), and presence of a bleeding disorder (P = .002; OR, 3.2). Risk factors for reoperation were similar, in addition to older age (P = .002; OR, 0.986). Complications other than reoperation were correlated with older age (P = .001; OR, 1.02) and diabetes (P = .001; OR, 2.59). Procedures were done mostly for infectious/inflammatory (70.4%) versus hypertrophic (16.4%) indications. Indication had no significant effect on the rate of reoperation. Most reoperations occurred after postoperative day 1 (86%; mean, 6.4 ± 4.2 days). Conclusion This review of a large validated surgical database provides an overview of the rates of, and risk factors for, complications and reoperations following tonsillectomy in the adult population.


Archives of Otolaryngology-head & Neck Surgery | 2017

Transoral Robotic Surgery–Assisted Endoscopy With Primary Site Detection and Treatment in Occult Mucosal Primaries

Kyle M. Hatten; Bert W. O’Malley; Andrés M. Bur; Mihir Patel; Christopher H. Rassekh; Jason G. Newman; Steven B. Cannady; Ara A. Chalian; Benjamin L. Hodnett; Alexander Lin; John N. Lukens; Roger B. Cohen; Joshua Bauml; Kathleen T. Montone; Virginia A. LiVolsi; Gregory S. Weinstein

Importance Management of cervical lymph node metastasis without a known primary tumor is a diagnostic and treatment challenge for head and neck oncologists. Identification of the occult mucosal primary tumor minimizes the morbidity of treatment. Objective To analyze the role of transoral robotic surgery (TORS) in facilitating the identification of a primary tumor site for patients presenting with squamous cell carcinoma of unknown primary (CUP). In addition, we assessed treatment deintensification by determining the number of patients who did not undergo definitive radiation therapy and chemotherapy. Design, Setting, and Participants In this retrospective case series from January 2011 to September 2015, 60 consecutive patients with squamous cell CUP who underwent TORS-assisted endoscopy and ipsilateral neck dissection were included from an academic medical center and studied to study the rate success rate of TORS identifying occult mucosal malignancy. Main Outcomes and Measures Success rate of identifying occult mucosal malignancy; usage of radiation therapy and chemotherapy. Results Overall, 60 patients (mean [SD] age, 55.5 [8.9] years) were identified; 48 of the 60 patients (80.0%) had a mucosal primary identified during their TORS-assisted endoscopic procedure. The mean (SD) size of the identified mucosal primary lesions was 1.3 (0.1) cm. All mucosal primaries, when found, originated in the oropharynx including the base of tongue in 28 patients (58%), palatine tonsil in 18 patients (38%), and glossotonsillar sulcus in 2 patients (4%). Among patients in this study, 40 (67%) did not receive chemotherapy, and 15 (25%) did not receive radiation therapy. Conclusions and Relevance Advances in transoral surgical techniques have helped identify occult oropharyngeal malignancies that traditionally have been treated with comprehensive radiation to the entire pharyngeal axis. We demonstrate the efficacy of a TORS-assisted approach to identify and surgically treat the primary tumor in patients presenting with CUP. In addition, patients managed with the TORS-assisted endoscopic approach benefit from surgical and pathological triage, which in turn results in deintensification of treatment by eliminating the need for chemotherapy in the majority of patients, as well as avoiding radiation therapy in select patients.


Otolaryngology-Head and Neck Surgery | 2017

Complications Associated with Mortality after Head and Neck Surgery.

Carolyn L. Mulvey; Jason A. Brant; Andrés M. Bur; Jinbo Chen; John P. Fischer; Steven B. Cannady; Jason G. Newman

Objective To determine which complications, as defined by the American College of Surgeons National Surgical Quality Improvement Program (NSQIP) database, correlate with 30-day mortality in surgery for malignancies of the head and neck. Study Design Retrospective review of prospectively collected national database. Setting NSQIP. Subjects and Methods NSQIP data from 2005 to 2014 were queried for ICD-9 codes head and neck malignancies. Multivariate logistic regression was used to examine the correlation of individual complications with 30-day mortality. Results In total, 15,410 cases met criteria with 3499 complications in 2235 cases. After controlling for patient and surgical variables, postoperative pneumonia (P = .02; odds ratio [OR], 2.39; 95% confidence interval [CI], 1.15-4.72), progressive renal insufficiency (P < .001; OR, 21.28; 95% CI, 4.22-87.94), bleeding requiring transfusion (P = .02; OR, 2.10; 95% CI, 1.12-3.84), sepsis (P = .02; OR, 2.86; 95% CI, 1.15-6.46), septic shock (P = .045; OR, 2.87; 95% CI, 0.98-7.81), stroke (P < .001; OR, 19.81; 95% CI, 6.23-56.03), and cardiac arrest (P < .001; OR, 135.59; 95% CI, 65.00-286.48) were independently associated with increased odds of 30-day mortality. Conclusion The NSQIP database has been extensively validated and used to examine surgical complications, yet there is little analysis on which complications are associated with death. This study identified complications associated with increased risk of 30-day mortality following head and neck cancer surgery. These associations may be used as a measure of complication severity and should be considered when using the NSQIP database to evaluate outcomes in head and neck surgery.


Head and Neck-journal for The Sciences and Specialties of The Head and Neck | 2016

Anterior lateral thigh osteomyocutaneous free flap reconstruction in the head and neck: The anterolateral thigh osteomyocutaneous femur bone flap

Robert M. Brody; Nirnimesh C. Pandey; Andrés M. Bur; Bert W. O'Malley; Christopher H. Rassekh; Gregory S. Weinstein; Ara A. Chalian; Jason G. Newman; Steven B. Cannady

The anterolateral thigh (ALT) free flap is one of the most commonly used donor sites in head and neck reconstruction, however, it is not typically considered when an osseous component is needed.


Otolaryngology-Head and Neck Surgery | 2016

Incidence and Risk Factors for Prolonged Hospitalization and Readmission after Transsphenoidal Pituitary Surgery

Andrés M. Bur; Jason A. Brant; Jason G. Newman; Kyle M. Hatten; Steven B. Cannady; John P. Fischer; John Y. K. Lee; Nithin D. Adappa

Objective To evaluate the incidence and factors associated with 30-day readmission and to analyze risk factors for prolonged hospital length of stay following transsphenoidal pituitary surgery. Study Design Retrospective longitudinal claims analysis. Setting American College of Surgeons National Surgical Quality Improvement Program. Subjects and Methods The database of the American College of Surgeons National Surgical Quality Improvement Program was queried for patients who underwent transsphenoidal pituitary surgery (Current Procedural Terminology code 61548 or 62165) between 2005 and 2014. Patient demographic information, indications for surgery, and incidence of hospital readmission and length of stay were reviewed. Risk factors for readmission and prolonged length of stay, defined as >75th percentile for the cohort, were identified through logistic regression modeling. Results A total of 1006 patients were included for analysis. Mean hospital length of stay after surgery was 4.1 ± 0.2 days. Predictors of prolonged length of stay were operative time (P < .001, odds ratio [OR] = 1.7, 95% confidence interval [95% CI] = 1.5-2.0), bleeding disorder (P = .049, OR = 3.1, 95% CI = 1.0-9.5), insulin-dependent diabetes (P = .007, OR = 2.4, 95% CI = 1.3-4.4), and reoperation (P < .001, OR = 10.3, 95% CI = 4.7-23.9). In a subset analysis of 529 patients who had surgery between 2012 and 2014, 7.2% (n = 38) required hospital readmission. History of congestive heart failure (CHF) was a predictor of hospital readmission (P = 0.03, OR = 12.7, 95% CI = 1.1-144.0). Conclusion This review of a large validated surgical database demonstrates that CHF is an independent predictor of hospital readmission after transsphenoidal surgery. Although CHF is a known risk factor for postoperative complications, it poses unique challenges to patients with potential postoperative pituitary dysfunction.


Laryngoscope | 2018

Safety of outpatient thyroidectomy: Review of the American College of Surgeons National Surgical Quality Improvement Program: Safety of Outpatient Thyroidectomy

Eamon J. McLaughlin; Jason A. Brant; Andrés M. Bur; John P. Fischer; Jinbo Chen; Steven B. Cannady; Ara A. Chalian; Jason G. Newman

To investigate national trends in admission status after thyroidectomy in the United States and to evaluate the factors associated with 30‐day unplanned readmission and reoperation.


JAMA Facial Plastic Surgery | 2018

Analysis of Facial Reanimation Procedures Performed Concurrently With Total Parotidectomy and Facial Nerve Sacrifice

G. Nina Lu; Mark Villwock; Clinton D. Humphrey; J. David Kriet; Andrés M. Bur

Importance Facial reanimation procedures share the same surgical field as a parotidectomy and are most easily accomplished at the time of facial nerve sacrifice. Early reanimation would also reduce the duration of paralysis and may lead to better functional outcomes. Objective To assess the incidence and types of facial nerve reanimation performed concurrently with total parotidectomy and facial nerve sacrifice using the American College of Surgeons National Surgical Quality Improvement Project (ACS-NSQIP) database. Design, Setting, and Participants This cross-sectional study identified 285 patients who underwent total parotidectomy with facial nerve sacrifice (Current Procedural Terminology code 42425) and evaluated the various types of facial reanimation procedures performed concurrently. Patients were identified from the ACS-NSQIP database encompassing 603 community and academic hospitals and underwent treatment from January 1, 2010, through December 31, 2015. Data were analyzed from September 20, 2017, through February 21, 2018. Main Outcomes and Measures Comparison of demographics in nonreanimation and reanimation groups and subgroups of nerve- and sling-type reanimation procedures. Results Of 285 patients who underwent total parotidectomy with facial nerve sacrifice (61.8% men; mean [SD] age, 64 [15] years), 89 (31.2%; 95% CI, 26.0%-37.0%) underwent at least 1 concurrent facial reanimation procedure. Of the facial nerve procedures performed, 41 (46.1%; 95% CI, 36.0%-56.0%) were nerve-type repairs, 31 (34.8%; 95% CI, 26.0%-45.0%) were sling-type repairs, and 17 (19.1%; 95% CI, 12.0%-29.0%) included both types. Patients treated with nerve-type repairs only were significantly younger than those treated with sling-type repairs only (mean [SD] age, 57.6 [16.0] vs 72.1 [13.8] years; P < .001). Forty-nine patients underwent free tissue reconstruction. Of those, 24 patients (49.0%) had concurrent facial reanimation procedure(s) performed; this proportion was significantly more than those who did not undergo free tissue reconstruction (65 of 236 [28.0%]; P = .003). Conclusions and Relevance In patients undergoing total parotidectomy with facial nerve sacrifice, many are not receiving a concurrent facial reanimation procedure at the time of their tumor resection. Those patients who underwent free tissue reconstruction were significantly more likely to receive a concurrent facial reanimation procedure. These findings may reveal an opportunity for earlier facial reanimation in this patient population. Level of Evidence NA.

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Jason G. Newman

University of Pennsylvania

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Steven B. Cannady

University of Pennsylvania

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Jason A. Brant

University of Pennsylvania

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John P. Fischer

University of Pennsylvania

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Ara A. Chalian

University of Pennsylvania

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Kyle M. Hatten

University of Pennsylvania

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Bert W. O'Malley

University of Pennsylvania

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