Oregon Health science Center

Oregon City, OR, United States

Oregon Health science Center

Oregon City, OR, United States
Time filter
Source Type

Wiler J.L.,Aurora University | Asplin B.R.,Fairview Health Services | Granovsky M.,Fort Washington Hospital | Moorhead J.,Oregon Health science Center | And 2 more authors.
Annals of Emergency Medicine | Year: 2012

Optimizing resource use, eliminating waste, aligning provider incentives, reducing overall costs, and coordinating the delivery of quality care while improving outcomes have been major themes of health care reform initiatives. Recent legislation contains several provisions designed to move away from the current fee-for-service payment mechanism toward a model that reimburses providers for caring for a population of patients over time while shifting more financial risk to providers. In this article, we review current approaches to episode of care development and reimbursement. We describe the challenges of incorporating emergency medicine into the episode of care approach and the uncertain influence this delivery model will have on emergency medicine care, including quality outcomes. We discuss the limitations of the episode of care payment model for emergency services and advocate retention of the current fee-for-service payment model, as well as identify research gaps that, if addressed, could be used to inform future policy decisions of emergency medicine health policy leaders. We then describe a meaningful role for emergency medicine in an episode of care setting. © 2011 American College of Emergency Physicians.

Orb Q.,University of Utah | Mace J.C.,Oregon Health Science Center | Deconde A.S.,University of California at San Diego | Steele T.O.,University of California at Davis | And 3 more authors.
International Forum of Allergy and Rhinology | Year: 2016

Background: The Rhinosinusitis Disability Index (RSDI) consists of multiple subdomains shown to be useful in studying chronic rhinosinusitis (CRS). The objective of this study was to determine if RSDI subdomain scores are associated with selection of treatment modality (endoscopic sinus surgery [ESS] or continued medical management [CMM]) in subjects with CRS. Methods: Patients with CRS were prospectively enrolled into a multi-institutional cohort study. Following an initial period of medical management, patients elected to undergo treatment with either ESS or CMM. Baseline RSDI total and subdomain scores were compared between patients electing different treatment modalities. Results: A total of 684 subjects were enrolled with 122 (17.8%) electing CMM and 562 (82.2%) electing ESS. When compared to patients undergoing CMM, patients electing ESS exhibited significantly higher mean baseline RSDI total scores (mean ± standard deviation [SD]: 48.1 ± 24.9 vs 40.1 ± 24.1; p = 0.001) and subdomain scores (emotional: 13.2 ± 9.1 vs 10.4 ± 8.3; p = 0.001; functional: 15.3 ± 8.9 vs 12.6 ± 8.4; p = 0.002; and physical: 19.6 ± 9.3 vs 17.1 ± 9.6; p = 0.007). Emotional subdomain scores were found to be the most associated with choice of treatment modality. Conclusion: Patients with CRS electing ESS had worse baseline RSDI total and subdomain scores compared to those electing CMM. Although both rhinologic and nonrhinologic symptoms contributed to the selection of treatment modality, emotional symptoms appeared to exhibit the greatest influence on patient-centered treatment decisions. © 2016 ARS-AAOA, LLC.

Bellows C.F.,Tulane University | Shadduck P.,Duke University | Helton W.S.,Virginia Mason Medical Center | Martindale R.,Oregon Health science Center | Fitzgibbons R.,Creighton University
Hernia | Year: 2014

Purpose: Biologic grafts are rarely used for inguinal herniorrhaphy. The aim of this study was to compare the clinical outcomes between patients undergoing a Lichtenstein's hernioplasty with a porcine mesh versus a standard synthetic. Methods: A prospective, randomized, double-blinded multicenter, evaluation of inguinal hernia repair was conducted between 2008 and 2010. Lichtenstein hernioplasty was performed using Strattice™ or lightweight polypropylene (Ultrapro) mesh. Quality of life, pain, overall complication rate, and recurrence were measured. Results: One hundred and seventy-two patients were randomized to Strattice™ (n = 84) or Ultrapro (n = 88). At 3 months postoperatively, there were no differences on the occurrence or type of wound events [RR: 0.98 (95 % CI 0.52-1.86, p = 0.69), Strattice™ (15 events) vs. Ultrapro (16 events)]. The mean level of impairment caused by the hernia, assessed by Activities Assessment Scale (AAS), significantly decreased postoperatively in both groups at 3 months (31 % Strattice™ and 37 % Ultrapro). Patients in the Strattice group reported significantly less postoperative pain during postoperative days 1 through 3 compared to Ultrapro patients. However, the amount of postoperative pain at 3 months, as assessed by the mean worst pain score on a visual analog scale and the Brief Pain Index, was similar between groups (95 % CI 1.0-29.3). No hernia recurrences were observed in either group. Conclusions: Strattice™ is safe and effective in repairing inguinal hernia, with comparable intra-operative and early postoperative morbidity to synthetic mesh. Long-term follow-up is necessary in order to know whether the clinical outcomes of Strattice are equivalent to standard synthetic mesh in patients undergoing Lichtenstein's hernioplasty. © 2013 Springer-Verlag France.

Steidl C.,University of British Columbia | Lee T.,University of British Columbia | Shah S.P.,University of British Columbia | Farinha P.,University of British Columbia | And 21 more authors.
New England Journal of Medicine | Year: 2010

Background: Despite advances in treatments for Hodgkin's lymphoma, about 20% of patients still die from progressive disease. Current prognostic models predict the outcome of treatment with imperfect accuracy, and clinically relevant biomarkers have not been established to improve on the International Prognostic Score. Methods: Using gene-expression profiling, we analyzed 130 frozen samples obtained from patients with classic Hodgkin's lymphoma during diagnostic lymph-node biopsy to determine which cellular signatures were correlated with treatment outcome. We confirmed our findings in an independent cohort of 166 patients, using immunohistochemical analysis. Results: Gene-expression profiling identified a gene signature of tumor-associated macrophages that was significantly associated with primary treatment failure (P = 0.02). In an independent cohort of patients, we found that an increased number of CD68+ macrophages was correlated with a shortened progression-free survival (P = 0.03) and with an increased likelihood of relapse after autologous hematopoietic stem-cell transplantation (P = 0.008), resulting in shortened disease-specific survival (P = 0.003). In multivariate analysis, this adverse prognostic factor outperformed the International Prognostic Score for disease-specific survival (P = 0.003 vs. P = 0.03). The absence of an elevated number of CD68+ cells in patients with limited-stage disease defined a subgroup of patients with a long-term disease-specific survival of 100% with the use of current treatment strategies. Conclusions: An increased number of tumor-associated macrophages was strongly associated with shortened survival in patients with classic Hodgkin's lymphoma and provides a new biomarker for risk stratification. Copyright © 2010 Massachusetts Medical Society.

Reece T.B.,University of Colorado at Denver | Welke K.F.,Oregon Health science Center | O'Brien S.,Duke Clinical Research Institute | Grau-Sepulveda M.V.,Duke Clinical Research Institute | And 2 more authors.
Annals of Thoracic Surgery | Year: 2014

Background Although questionable durability has tempered enthusiasm for the Ross procedure in the last decade, the perioperative risks of the Ross procedure relative to conventional aortic valve replacement are not well described. The goal of this study is to describe both the perioperative outcomes and utilization trends of the Ross procedure in adults in The Society of Thoracic Surgeons Adult Cardiac Surgery Database. Methods The Society of Thoracic Surgeons Adult Cardiac Surgery Database was used to review all Ross procedures performed between 1994 and 2010. The utilization of the procedure in the database was assessed. Then the preoperative comorbidities, patient demographics, and risk factors were reviewed, as were intraoperative and perioperative outcomes. Results Of 648,541 aortic valve replacements during the study period, 3,054 (0.47%) were identified as Ross procedures. Utilization of the procedures as a percent of total aortic valve replacements peaked in 1998 at 1.2%, followed by a steady decline to 0.09% by 2010. More than a quarter of all Ross operations were performed at six sites. Using propensity-matching analyses, Ross patients experienced significantly more perioperative complications including reexploration (9.4% versus 5.8%; p < 0.01), renal failure (2.6% versus 0.8%; p < 0.001), and operative mortality (2.7% versus 0.9%; p = 0.001). Conclusions These data suggest that the Ross procedure is associated with greater perioperative morbidity and mortality risks compared with conventional aortic valve replacement. Recognition of these risks along with durability concerns have resulted in a dramatic decline in the number of Ross procedures performed in North America in the last decade. © 2014 by The Society of Thoracic Surgeons.

Holihan J.L.,University of Texas Health Science Center at Houston | Alawadi Z.,University of Texas Health Science Center at Houston | Martindale R.G.,Oregon Health science Center | Roth J.S.,University of Kentucky | And 4 more authors.
Journal of the American College of Surgeons | Year: 2015

Background Ventral hernia repairs are one of the most common procedures performed by the general surgeon. They are also among the most complex procedures performed. We hypothesized that with each surgical failure, subsequent ventral hernia repair becomes more complicated and morbid. Study Design We assessed a multicenter database of patients who underwent an elective ventral hernia repair from 2000 to 2012 with at least 6 months of follow-up and elective repairs. Patients were evaluated by the number of previous ventral hernia repairs they had: primary ventral hernia repair (PVHR), first time incisional hernia repair (IHR1), second time incisional hernia repair (IHR2), or third time or greater incisional hernia repair (IHR3). The main outcomes measured were abdominal reoperation, operative duration, surgical site infection (SSI), and hernia recurrence. Complications were assessed and compared between the 4 groups. Time to recurrence was estimated using the Kaplan-Meier curve method by study cohort (PVHR, IHR1, IHR2, IHR3). Results A total of 794 patients were assessed; of these, 481 (60.6%) had PVHR, 207 (26.1%) had IHR1, 78 (9.8%) had IHR2, and 28 (3.5%) had IHR3. Patients with multiple repairs were more likely to undergo subsequent reoperation, have a longer operative duration, develop SSI, and have a recurrence. At 140 months of follow-up, 37% of primary ventral hernias and 64% of incisional hernias have recurred. The highest recurrence rates are seen in IHR3, with 73% recurring. Conclusions Previous ventral hernia repair increases the complication profile of repair, creating a vicious cycle of repair, complications, reoperation, and re-repair. Furthermore, long-term outcomes for ventral hernia repair are poor. Future studies should focus on hernia prevention and improving long-term outcomes after hernia repair. © 2015 American College of Surgeons.

Liang M.K.,University of Texas Health Science Center at Houston | Goodenough C.J.,University of Texas Health Science Center at Houston | Martindale R.G.,Oregon Health science Center | Roth J.S.,University of Kentucky | Kao L.S.,University of Texas Health Science Center at Houston
Surgical Infections | Year: 2015

Background: Previously, we reported that the Ventral Hernia Risk Score (VHRS) was more accurate in a Veterans Affairs (VA) population in predicting surgical site infection (SSI) after open ventral hernia repair (VHR) compared with other models such as the Ventral Hernia Working Group (VHWG) model. The VHRS was developed using single-center data and stratifies SSI risk into five groups based on concomitant hernia repair, skin flaps created, American Society of Anesthesiologists (ASA) score ≥3, body mass index ≥40 kg/m2, and incision class 4. The purpose of this study was to validate the VHRS for other hospitals. Methods: A prospective database of all open VHRs performed at three institutions from 2009-2011 was utilized. All 436 patients with a follow-up of at least 1 mo were included. The U.S. Centers for Disease Control and Prevention (CDC) definition of SSI was utilized. Each patient was assigned a VHRS, VHWG, and CDC incision classification. Receiver-operating characteristic curves were used to assess predictive accuracy, and the areas under the curve (AUCs) were compared for the three risk-stratification systems. Results: The median follow-up was 20 mos (range 1-49 mos). During this time, 111 patients (25.5%) developed a SSI. The AUC of the VHRS (0.73; 95% confidence interval [CI] 0.67-0.78) was greater than that of the VHWG (0.66; 95% CI 0.60-0.72; p<0.01) and the CDC incision class (0.68; 95% CI 0.61-0.74; p<0.05). Conclusions: The VHRS provides a novel, internally and externally validated score for a patient's likelihood of developing a SSI after open VHR. Elevating skin flaps, ASA score ≥3, concomitant procedures, morbid obesity, and incision class all independently predicted SSI. It remains to be determined if pre-operative patient selection and risk reduction, surgical techniques, and post-operative management can improve outcomes in the highest-risk patients. The VHRS provides a starting point for key stakeholders to discuss the management of ventral hernias. © 2015 Mary Ann Liebert, Inc.

Byrne S.L.,Harvard University | Buckett P.D.,Harvard University | Kim J.,Harvard University | Luo F.,Harvard University | And 4 more authors.
PLoS ONE | Year: 2013

Previous studies have shown that the small molecule iron transport inhibitor ferristatin (NSC30611) acts by down-regulating transferrin receptor-1 (TfR1) via receptor degradation. In this investigation, we show that another small molecule, ferristatin II (NSC8679), acts in a similar manner to degrade the receptor through a nystatin-sensitive lipid raft pathway. Structural domains of the receptor necessary for interactions with the clathrin pathway do not appear to be necessary for ferristatin II induced degradation of TfR1. While TfR1 constitutively traffics through clathrin-mediated endocytosis, with or without ligand, the presence of Tf blocked ferristatin II induced degradation of TfR1. This effect of Tf was lost in a ligand binding receptor mutant G647A TfR1, suggesting that Tf binding to its receptor interferes with the drug's activity. Rats treated with ferristatin II have lower TfR1 in liver. These effects are associated with reduced intestinal 59Fe uptake, lower serum iron and transferrin saturation, but no change in liver non-heme iron stores. The observed hypoferremia promoted by degradation of TfR1 by ferristatin II appears to be due to induced hepcidin gene expression. © 2013 Byrne et al.

Khan A.,Oregon Health Science Center | Morgenthaler T.I.,Center for Sleep Medicine | Ramar K.,Center for Sleep Medicine
Journal of Clinical Sleep Medicine | Year: 2014

Introduction: The effect of isolated unilateral or bilateral diaphragmatic dysfunction (DD), in the absence of a generalized neuromuscular disorder, on sleep disordered breathing (SDB) is not well understood. The type of positive airway pressure (PAP) device needed to treat SDB in patients with isolated DD is also not well established. Methods: We retrospectively analyzed data on patients with isolated unilateral or bilateral DD who were referred for polysomnography (PSG) for clinical symptoms or abnormal oximetry between 1994 and 2006. Results: We found 66 patients who met criteria, of whom 74.2% were males with an average age of 58.8 ± 10.9 years. 56 had isolated unilateral DD, and 10 had isolated bilateral DD. All had significant SDB with an apnea-hypopnea index (AHI) of 26.6 ± 28.4. There were no significant differences in PSG measures, arterial blood gas analysis, pulmonary function tests, or echocardiographic data, except for lower maximal inspiratory pressure in patients with bilateral DD compared to unilateral DD (40.2% ± 17.8% vs. 57.7% ± 20.5%, p = 0.02). Control of SDB with continuous PAP (CPAP) was possible in only 37.9% of patients with the rest requiring bilevel PAP (BPAP). Patients with isolated bilateral DD and SDB were 6.8 times more likely to fail CPAP than those with unilateral DD (p = 0.03). Conclusions: Most patients with isolated DD failed CPAP and required BPAP. Patients with bilateral DD were more likely to require BPAP than those with unilateral DD. Patients with isolated DD should be considered for in-lab titration to determine adequacy of therapy.

PubMed | Robert Bosch GmbH, University of Aarhus, CAS Beijing Institute of Genomics, University of Barcelona and 9 more.
Type: Journal Article | Journal: Leukemia | Year: 2016

Follicular lymphoma (FL) is typically an indolent disease, but 30-40% of FL cases transform into an aggressive lymphoma (tFL) with a poor prognosis. To identify the genetic changes that drive this transformation, we sequenced the exomes of 12 cases with paired FL and tFL biopsies and identified 45 recurrently mutated genes in the FL-tFL data set and 39 in the tFL cases. We selected 496 genes of potential importance in transformation and sequenced them in 23 additional tFL cases. Integration of the mutation data with copy-number abnormality (CNA) data provided complementary information. We found recurrent mutations of miR-142, which has not been previously been reported to be mutated in FL/tFL. The genes most frequently mutated in tFL included KMT2D (MLL2), CREBBP, EZH2, BCL2 and MEF2B. Many recurrently mutated genes are involved in epigenetic regulation, the Janus-activated kinase-signal transducer and activator of transcription (STAT) or the nuclear factor-B pathways, immune surveillance and cell cycle regulation or are TFs involved in B-cell development. Of particular interest are mutations and CNAs affecting S1P-activated pathways through S1PR1 or S1PR2, which likely regulate lymphoma cell migration and survival outside of follicles. Our custom gene enrichment panel provides high depth of coverage for the study of clonal evolution or divergence.

Loading Oregon Health science Center collaborators
Loading Oregon Health science Center collaborators