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Figurelle ME, Meyer DM, Perrinez ES, Paulson D, Pannell JS, Santiago-Dieppa DR, Khalessi AA, Bolar DS, Bykowski J, Meyer BC. Viz.ai Implementation of Stroke Augmented Intelligence and Communications Platform to Improve Indicators and Outcomes for a Comprehensive Stroke Center and Network. AJNR Am J Neuroradiol 2023; 44:47-53. [PMID: 36574318 PMCID: PMC9835916 DOI: 10.3174/ajnr.a7716] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Accepted: 10/17/2022] [Indexed: 12/13/2022]
Abstract
BACKGROUND AND PURPOSE Comprehensive stroke centers continually strive to narrow neurointerventional time metrics. Although process improvements have been put in place to streamline workflows, complex pathways, disparate imaging locations, and fragmented communications all highlight the need for continued improvement. MATERIALS AND METHODS This Quality Improvement Initiative (VISIION) was implemented to assess our transition to the Viz.ai platform for immediate image review and centralized communication and their effect on key performance indicators in our comprehensive stroke center. We compared periods before and following deployment. Sequential patients having undergone stroke thrombectomy were included. Both direct arriving large-vessel occlusion and Brain Emergency Management Initiative telemedicine transfer large-vessel occlusion cases were assessed as were subgroups of OnHours and OffHours. Text messaging thread counts were compared between time periods to assess communications. Mann-Whitney U and Student t tests were used. RESULTS Eighty-two neurointerventional cases were analyzed pre vs. post time periods: (DALVO-OnHours 7 versus 7, DALVO-OffHours 10 versus 5, BEMI-OnHours 13 versus 6, BEMI-OffHours 17 versus 17). DALVO-OffHours had a 39% door-to-groin reduction (157 versus 95 minutes, P = .009). DALVO-All showed a 32% reduction (127 versus 86 minutes, P = .006). BEMI-All improved 33% (42 versus 28 minutes, P = .036). Text messaging thread counts improved 30% (39 versus 27, P = .04). CONCLUSIONS There was an immediate improvement following Viz.ai implementation for both direct arriving and telemedicine transfer thrombectomy cases. In the greatest opportunity subset (direct arriving large-vessel occlusion-OffHours: direct arriving cases requiring team mobilization off-hours), we noted a 39% improvement. With Viz.ai, we noted that immediate access to images and streamlined communications improved door-to-groin time metrics for thrombectomy. These results have implications for future care processes and can be a model for centers striving to optimize workflow and improve thrombectomy timeliness.
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Affiliation(s)
- M E Figurelle
- From the University of California, San Diego, San Diego, California
| | - D M Meyer
- From the University of California, San Diego, San Diego, California
| | - E S Perrinez
- From the University of California, San Diego, San Diego, California
| | - D Paulson
- From the University of California, San Diego, San Diego, California
| | - J S Pannell
- From the University of California, San Diego, San Diego, California
| | | | - A A Khalessi
- From the University of California, San Diego, San Diego, California
| | - D S Bolar
- From the University of California, San Diego, San Diego, California
| | - J Bykowski
- From the University of California, San Diego, San Diego, California
| | - B C Meyer
- From the University of California, San Diego, San Diego, California
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Tomasino SF, Pines RM, Cottrill MP, Hamilton MA, Alvey K, Buen M, Chan-Myers H, Chang G, Dell’Aringa B, Gonzales E, Hitchins V, Hollingsworth A, Jeske A, Kingma D, Kitchen nee Dormstetter K, Klein D, Lappalainen S, Lawrence J, Lehman L, Malulla K, Michler T, Paulson D, Regan P, Rodriguez A, Rottjakob D, Sathe M, Steinagel S, Suchmann D, Tester J, To T, Wieland D, Zhang Q. Determining the Efficacy of Liquid Sporicides Against Spores of Bacillus subtilis on a Hard Nonporous Surface Using the Quantitative Three Step Method: Collaborative Study. J AOAC Int 2019. [DOI: 10.1093/jaoac/91.4.833] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
Abstract
A collaborative study was conducted to validate the quantitative Three Step Method (TSM), a method designed to measure the performance of liquid sporicides on a hard nonporous surface. Ten laboratories agreed to participate in the collaborative study; data from 8 of 10 participating laboratories were used in the final statistical analysis. The TSM uses 5 5 1 mm glass coupons (carriers) upon which spores have been inoculated and which are introduced into liquid sporicidal agent contained in a microcentrifuge tube. Following exposure to a test chemical and a neutralization agent, spores are removed from carriers in 3 fractions: passive removal (Fraction A), sonication (Fraction B), and gentle agitation (Fraction C). Liquid from each fraction is serially diluted and plated on a recovery medium for spore enumeration. Control counts are compared to the treated counts, and the level of efficacy is determined by calculating the log10 reduction (LR) of spores. The main statistical goals were to evaluate the repeatability and reproducibility of the LR values, to estimate the components of variance for LR, and to assess method responsiveness. AOAC Method 966.04Method II was used as a reference method. The scope of the validation was limited to testing liquid formulations against spores of Bacillus subtilis, a surrogate for virulent strains of B. anthracis, on a hard nonporous surface (glass). The test chemicals used in the study were sodium hypochlorite, a combination of peracetic acid and hydrogen peroxide, and glutaraldehyde. Each test chemical was evaluated at 3 levels of presumed efficacy: high, medium, and low. Three replications were required. The TSM was validated as it successfully met the statistical parameters for quantitative test methods. Satisfactory validation parameters, such as the repeatability standard deviation (Sr) and reproducibility standard deviation (SR), were obtained for control carrier counts and LR values. Both the TSM and the reference method were responsive to the efficacy levels of the test chemicals. For the 72 total TSM tests conducted, the mean ( standard error of the mean) log density of spores per control carrier was 6.86 ( 0.08); the Sr and SR were low at 0.15 and 0.27, respectively. Across the range of test chemicals, the Sr and SR estimates associated with LR were also acceptably low. The Sr rangedfrom 0.17 to 0.72 and the SR ranged from 0.34 to 1.43. Overall, the Sr and SR estimates associated with the efficacy data were within the ranges published for other quantitative methods and meet the performance characteristics necessary for validation.
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Affiliation(s)
- Stephen F Tomasino
- U.S. Environmental Protection Agency, Office of Pesticide Programs, Microbiology Laboratory Branch, Environmental Science Center, Ft. Meade, MD 20755-5350
| | - Rebecca M Pines
- U.S. Environmental Protection Agency, Office of Pesticide Programs, Microbiology Laboratory Branch, Environmental Science Center, Ft. Meade, MD 20755-5350
| | - Michele P Cottrill
- U.S. Environmental Protection Agency, Office of Pesticide Programs, Microbiology Laboratory Branch, Environmental Science Center, Ft. Meade, MD 20755-5350
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Affiliation(s)
| | - D Brush
- University of Central Florida
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Affiliation(s)
| | | | - T Wharton
- School of Social Work, University of Central Florida
| | - E Gendron
- Alzheimers and Dementia Resource Center
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Shah M, Paulson D, Bassett R, Herring D, Scott R, Herrera M, James N. PRELIMINARY EVIDENCE FOR A FEASIBLE DEMENTIA CAREGIVER SUPPORT GROUP IN A PRIMARY CARE SETTING. Innov Aging 2018. [DOI: 10.1093/geroni/igy023.1725] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- M Shah
- University of Central Florida
| | | | | | | | - R Scott
- University of Central Florida
| | | | - N James
- University of Central Florida
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Patel S, Wharton T, Paulson D. NATIONAL SURVEILLANCE TO CLOSE THE GAP: UNDERSTANDING HEALTHCARE ACCESS BY AGE IN THE DEAF COMMUNITY. Innov Aging 2018. [DOI: 10.1093/geroni/igy023.532] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- S Patel
- University of Central Florida College of Medicine
| | - T Wharton
- School of Social Work, University of Central Florida
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Bassett R, Paulson D. PILOT TESTING AN EXPERIMENTAL STRATEGY FOR EXAMINING A DEVELOPMENTAL MODEL OF FILIAL OBLIGATION. Innov Aging 2018. [DOI: 10.1093/geroni/igy031.3610] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Falcao D, Paulson D, Herrera M, Irurita Ballesteros C. ATTACHMENT, SATISFACTION IN CLOSE RELATIONSHIP, AND WELLBEING IN MARRIED ADULT CHILDREN CAREGIVERS. Innov Aging 2018. [DOI: 10.1093/geroni/igy023.433] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- D Falcao
- University of Sao Paulo (USP) and University of Central Florida (UCF)
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Scott R, Paulson D, Camacho S. VALIDATION OF THE PAULSON-LICHTENBERG FRAILTY INDEX AGAINST THE DEFICIT ACCUMULATION MODEL. Innov Aging 2018. [DOI: 10.1093/geroni/igy023.2586] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- R Scott
- University of Central Florida
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Herrera M, Bassett R, Paulson D. PREDICTORS OF END-OF-LIFE PLANNING: HEALTH AND RETIREMENT STUDY. Innov Aging 2017. [DOI: 10.1093/geroni/igx004.4397] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- M. Herrera
- University of Central Florida, Orlando, Florida
| | | | - D. Paulson
- University of Central Florida, Orlando, Florida
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Paulson D, Shah M, Herring D, Scott R, Herrera M, Brush D, Bassett R. C-REACTIVE PROTEIN PARTIALLY MEDIATES THE RELATIONSHIP BETWEEN MODERATE ALCOHOL USE AND DEPRESSION. Innov Aging 2017. [DOI: 10.1093/geroni/igx004.4378] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- D. Paulson
- University of Central Florida, Orlando, Florida
| | - M. Shah
- University of Central Florida, Orlando, Florida
| | - D. Herring
- University of Central Florida, Orlando, Florida
| | - R. Scott
- University of Central Florida, Orlando, Florida
| | - M. Herrera
- University of Central Florida, Orlando, Florida
| | - D. Brush
- University of Central Florida, Orlando, Florida
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Scott R, Paulson D. VASCULAR DEPRESSION FUNCTIONS INDEPENDENTLY OF APOE GENOTYPE: THE WISCONSIN LONGITUDINAL STUDY. Innov Aging 2017. [DOI: 10.1093/geroni/igx004.2966] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- R. Scott
- Department of Psychology, University of Central Florida, Orlando, Florida
| | - D. Paulson
- Department of Psychology, University of Central Florida, Orlando, Florida
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Herring D, Paulson D. MODERATE ALCOHOL USE AND COGNITIVE PERFORMANCE OVER TIME AMONG OLDER ADULTS. Innov Aging 2017. [DOI: 10.1093/geroni/igx004.1685] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- D. Herring
- University of Central Florida, Orlando, Florida
| | - D. Paulson
- University of Central Florida, Orlando, Florida
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Amorim DS, Santos CMD, Krell FT, Dubois A, Nihei SS, Oliveira OMP, Pont A, Song H, Verdade VK, Fachin DA, Klassa B, Lamas CJE, Oliveira SS, Carvalho CJBD, Mello-Patiu CA, Hajdu E, Couri MS, Silva VC, Capellari RS, Falaschi RL, Feitosa RM, Prendini L, Pombal JPJ, Fernández F, Rocha RM, Lattke JE, Caramaschi U, Duarte M, Marques AC, Reis RE, Kurina O, Takiya DM, Tavares M, Fernandes DS, Franco FL, Cuezzo F, Paulson D, Guénard B, Schlick-Steiner BC, Arthofer W, Steiner FM, Fisher BL, Johnson RA, Delsinne TD, Donoso DA, Mulieri PR, Patitucci LD, Carpenter JM, Herman L, Grimaldi D. Timeless standards for species delimitation. Zootaxa 2016; 4137:121-8. [PMID: 27395746 DOI: 10.11646/zootaxa.4137.1.9] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2016] [Indexed: 11/04/2022]
Abstract
Recently a new species of bombyliid fly, Marleyimyia xylocopae, was described by Marshall & Evenhuis (2015) based on two photographs taken during fieldwork in the Republic of South Africa. This species has no preserved holotype. The paper generated some buzz, especially among dipterists, because in most cases photographs taken in the field provide insufficient information for properly diagnosing and documenting species of Diptera.
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Paulson D, Horner MD, Bachman D. A Comparison of Four Embedded Validity Indices for the RBANS in a Memory Disorders Clinic. Arch Clin Neuropsychol 2015; 30:207-16. [DOI: 10.1093/arclin/acv009] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/17/2015] [Indexed: 11/12/2022] Open
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Paulson D, Sikora R, Whiteman C, Doerr R, Davis S, Davidov D. Resource Utilization and Out-of-Hospital Treatment of Pediatric Patients in Northern West Virginia. Ann Emerg Med 2013. [DOI: 10.1016/j.annemergmed.2013.07.113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Soderberg AM, Kulkarni SR, Berger E, Fox DW, Sako M, Frail DA, Gal-Yam A, Moon DS, Cenko SB, Yost SA, Phillips MM, Persson SE, Freedman WL, Wyatt P, Jayawardhana R, Paulson D. The sub-energetic γ-ray burst GRB 031203 as a cosmic analogue to the nearby GRB 980425. Nature 2004; 430:648-50. [PMID: 15295592 DOI: 10.1038/nature02757] [Citation(s) in RCA: 155] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2004] [Accepted: 06/15/2004] [Indexed: 11/09/2022]
Abstract
Over the six years since the discovery of the gamma-ray burst GRB 980425, which was associated with the nearby (distance approximately 40 Mpc) supernova 1998bw, astronomers have debated fiercely the nature of this event. Relative to bursts located at cosmological distance (redshift z approximately 1), GRB 980425 was under-luminous in gamma-rays by three orders of magnitude. Radio calorimetry showed that the explosion was sub-energetic by a factor of 10. Here we report observations of the radio and X-ray afterglow of the recent GRB 031203 (refs 5-7), which has a redshift of z = 0.105. We demonstrate that it too is sub-energetic which, when taken together with the low gamma-ray luminosity, suggests that GRB 031203 is the first cosmic analogue to GRB 980425. We find no evidence that this event was a highly collimated explosion viewed off-axis. Like GRB 980425, GRB 031203 appears to be an intrinsically sub-energetic gamma-ray burst. Such sub-energetic events have faint afterglows. We expect intensive follow-up of faint bursts with smooth gamma-ray light curves (common to both GRB 031203 and 980425) to reveal a large population of such events.
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Affiliation(s)
- A M Soderberg
- Caltech Optical Observatories 105-24, California Institute of Technology, Pasadena, California 91125, USA.
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Seal∗ L, Paulson D. Antimicrobial Persistence and Residual Effect in Healthcare Personnel Handwashes. Am J Infect Control 2004. [DOI: 10.1016/j.ajic.2004.04.031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Paulson D, Kennedy D, Donovick R, Carpenter R, Cherubini M, Techner L, Du W, Ma Y, Schmidt W, Wallin B, Jackson D. Novel therapeutic agents. The Journal of Pain 2004. [DOI: 10.1016/j.jpain.2004.02.196] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Franklin ME, Gonzalez JJ, Miter DB, Glass JL, Paulson D. Laparoscopic diagnosis and treatment of intestinal obstruction. Surg Endosc 2003; 18:26-30. [PMID: 14625729 DOI: 10.1007/s00464-003-8804-7] [Citation(s) in RCA: 60] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2003] [Accepted: 06/19/2003] [Indexed: 01/26/2023]
Abstract
BACKGROUND Intestinal obstruction is a common reason for general surgical referral. The traditional approach has been conservative management, followed by laparotomy if conservative measures are unsuccessful. However, with the advent of minimally invasive surgery, the need for laparotomy for this common problem is being challenged. METHODS From May 1991 to April 2001, 167 patients underwent laparoscopy for diagnosis and/or treatment of intestinal obstruction. Average patient age was 62 years (range, 21-98). The site of obstruction was the stomach in seven patients, small bowel in 116 patients, and colon in 44 patients. RESULTS Laparoscopy successfully diagnosed the site of obstruction in all patients. In addition, 154 patients (92.2%) were successfully treated laparoscopically without conversion to laparotomy. Both intraoperative and postoperative complication rates were low (3.5 and 18.6%, respectively) and compared favorably with those of published reports. CONCLUSIONS Intestinal obstruction can be approached safely and effectively by laparoscopy with the intent not only to correctly diagnose the patient but also to render treatment.
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Affiliation(s)
- M E Franklin
- Texas Endosurgery Institute, 4242 E. Southcross, Suite 1, San Antonio, TX 78222, USA
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Paulson D, Hofmann R. Perineal Prostatectomy. Prostate Cancer 2003. [DOI: 10.1007/978-3-642-56321-8_17] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Taylor JA, Umbach DM, Stephens E, Castranio T, Paulson D, Robertson C, Mohler JL, Bell DA. The role of N-acetylation polymorphisms in smoking-associated bladder cancer: evidence of a gene-gene-exposure three-way interaction. Cancer Res 1998; 58:3603-10. [PMID: 9721868] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Arylamines are known bladder carcinogens and are an important constituent of tobacco smoke. The handling of arylamines in the body is complex and includes metabolism by NAT1 and NAT2, enzymes that play a role in both activation and detoxification of arylamines and their congeners. Both NAT1 and NAT2 are polymorphic, with alleles that have been shown to correlate with higher or lower enzyme activity. To explore the combined role of these genes and exposure on bladder cancer risk, we examined the NAT1 and NAT2 genotype in a case-control study of bladder cancer in which detailed exposure histories were available on all 230 cases and 203 frequency-matched controls. Using PCR-RFLP genotyping, we determined NAT2 genotype for the five most common alleles, NAT2*4, NAT2*5, NAT2*6, NAT2*7, NAT2*14 (frequently referred to as WT, M1, M2, M3, and M4, respectively). Similarly, the NAT1 genotype was determined for the four most common alleles NAT1*3, NAT1*4, and NAT1*11, and the putative high-activity allele, NAT1*10. No association between NAT2 genotype and bladder cancer risk was found whether genotype was considered alone or in combination with smoking, in either stratified or logistic regression analysis that adjusted for age, sex, and race. Stratified and logistic regression analysis both demonstrated an increased risk for individuals carrying the NAT1*10 allele among smokers. There was evidence of a gene-dosage effect, such that those who were homozygous for the NAT1*10 allele had the highest risks. There was also evidence of a statistically significant gene-environment interaction, such that bladder cancer risk depends on both NAT1 genotype and smoking exposure. Interestingly, although NAT2 genotype did not influence risk either alone or in combination with smoking exposure, there was evidence of a statistically significant gene-gene-environment three-way interaction. Bladder cancer risk from smoking exposure is particularly high in those who inherit NAT2 slow alleles in combination with one or two copies of the NAT1*10 allele. A biological mechanism for this finding is suggested.
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Affiliation(s)
- J A Taylor
- Epidemiology Branch, Laboratory of Molecular Carcinogenesis, National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina 27709, USA.
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Plotkin BJ, Paulson D. Zucker rat (fa/fa), a model for the study of immune function in type-II diabetes mellitus: effect of exercise and caloric restriction on the phagocytic activity of macrophages. Lab Anim Sci 1996; 46:682-4. [PMID: 9001184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- B J Plotkin
- Department of Microbiology, Midwestern University, Downers Grove, Illinois, USA
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Plotkin BJ, Paulson D, Chelich A, Jurak D, Cole J, Kasimos J, Burdick JR, Casteel N. Immune responsiveness in a rat model for type II diabetes (Zucker rat, fa/fa): susceptibility to Candida albicans infection and leucocyte function. J Med Microbiol 1996; 44:277-83. [PMID: 8606356 DOI: 10.1099/00222615-44-4-277] [Citation(s) in RCA: 46] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
There is a causal relationship between obesity-associated diabetes and an increased risk of infection. The ability of obese (fa/fa) Zucker rats, a model for non-insulin-dependent diabetes mellitus (NIDDM), to clear Candida albicans from the circulation and tissues was compared to that of lean (Fa/fa, Fa/Fa) Zucker rat controls as a measure of immune function. The ID50 necessary to establish tissue colonisation in lean Zucker rats was 1.18 log10 times greater than that determined for the obese Zucker rats. Nine days after intravenous (i.v.) injection of a yeast suspension, the organs of obese rats had a 10-fold greater yeast/g organ burden than did lean rats. The kidney was determined to be the primary target organ for colonisation. Germ-tube formation by C. albicans occurred at a rate 1.5 times faster in serum from obese rats than in serum from lean rats. Peritoneal polymorphonuclear leucocytes, resident macrophages and thioglycollate-elicited macrophages from lean Zucker rats displayed a significantly higher ability to kill ingested yeast cells than analogous cell populations from obese Zucker rats.
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Affiliation(s)
- B J Plotkin
- Department of Microbiology, Midwestern University, Downers Grove, IL 60515, USA
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Paulson D, Denis L, Orikasa S, Bartolucci A, Bouffioux C, Hirao Y, Jewett MA, Pagano F, Pontes JE. Optimal staging procedures, including imaging, to define prognosis of bladder cancer. Int J Urol 1995; 2 Suppl 2:1-7. [PMID: 7553298 DOI: 10.1111/j.1442-2042.1995.tb00474.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- D Paulson
- Duke University Medical Center, Durham, North Carolina 27710, USA
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Hacker TA, Renstrom B, Paulson D, Liedtke AJ, stanley WC. Ischemia produces an increase in ammonia output in swine myocardium. Cardioscience 1994; 5:255-60. [PMID: 7742484] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
We have recently reported that ischemia causes myocardial ammonia production which is not due to amino acid breakdown. The purpose of this study was to identify the remaining possible sources of ammonia production. The prospects were either deamination of AMP to inosine monophosphate (IMP), or adenosine to inosine. Eight intact extracorporally perfused pig hearts were rendered regionally ischemic by reducing the left anterior descending coronary artery blood flow by 60% for 40 minutes. Adjacent myocardium supplied by the circumflex artery was held aerobic throughout the study. Myocardial oxygen consumption and regional systolic shortening in the left anterior descending perfusion bed fell by 50 and 32%, respectively. Myocardial ammonia production increased significantly (p = 0.008) and tissue ammonia concentration was 55% greater in the ischemic left anterior descending bed than in the aerobic circumflex bed (p = 0.003). Compared to the circumflex bed, ATP and creatine phosphate concentrations in the left anterior descending bed were decreased by 41 and 53%, respectively. There were no significant increases in AMP or IMP levels, however there were dramatic increases of 525 and 397% in adenosine and inosine levels in the ischemic tissue. Thus, myocardial ammonia production was stimulated by ischemia without an increase in IMP levels. Combined with the fact that adenylate deaminase levels in the swine myocardium are normally low, this leads to the likely conclusion that source of the increased myocardial ammonia production during ischemia is deamination of adenosine, not IMP formation from AMP.
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Affiliation(s)
- T A Hacker
- Biodynamics Laboratory, University of Wisconsin, Madison, USA
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Paulson D. Diary of a vasectomy: a report from the cutting edge. Am Health 1993; 12:70-5. [PMID: 12287436] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/19/2023]
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Abstract
When cardiac function in isolated rat hearts was impaired by subjecting them to ischemia, subsequent perfusion with propionyl-L-carnitine and related compounds increased their rate of recovery. Thus at 11 mM, both propionyl-L-carnitine and, to a lesser extent, its taurine amide, and also acetyl-L-carnitine, significantly restored cardiac function in 15 minutes after 90 minutes of either low-flow or intermittent no-flow ischemia. Carnitine itself was ineffective. Propionyl-L-carnitine also increased tissue ATP and creatine phosphate compared with controls, but did not affect the levels of long-chain acyl carnitine and coenzyme. These esters also depleted fatty acid peroxidation, as shown with malonaldehyde, and were more effective than carnitine in preventing the production of superoxide. In myocytes, propionyl-L-carnitine alone stimulated palmitate oxidation, but in rat heart homogenates, both L-carnitine and propionyl-L-carnitine did so, while acetyl-L-carnitine was actually inhibitory. Possible mechanisms for the protective action of propionyl-L-carnitine against ischemia include an increased rate of cellular transport, stimulation of fatty acid oxidation, and a reduction of free radical formation.
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Affiliation(s)
- A Shug
- University of Wisconsin Medical School, Madison
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Schally AV, Colaluca J, Paulson D, Carter WH, Neitzschman HR, Lafaye H, Cai RZ. Effect of somatostatin analogs on gastric acid secretion in dogs and rats. Int J Pept Protein Res 1990; 36:267-74. [PMID: 1980670 DOI: 10.1111/j.1399-3011.1990.tb00977.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The effects of several superactive analogs of somatostatin on gastric acid response to various exogenous and endogenous stimulants were investigated in conscious dogs and rats with gastric fistulae (GF). The inhibition was compared to that induced by somatostatin-14 (S-S-14) at two dose levels. Several octapeptide analogs of somatostatin including D-Phe-Cys-Tyr-D-Trp-Lys-Val-Cys-Trp-NH2 (RC-160) and D-Phe-Cys-Tyr-D-Trp-Lys-Val-Cys-Thr-NH2 (RC-121), which were superactive in tests on suppression of GH levels, were 4-5 times more potent than S-S-14 in inhibiting desglugastrin-stimulated gastric acid secretion in GF dogs. The analog RC-160 also reduced the rise in serum gastrin levels and gastric acid secretion induced by sham feeding (SF) in dogs with gastric and esophageal fistulae (EF), but did not decrease food consumption. Gastric acid secretion induced by histamine (80 micrograms/kg/h) in dogs was not affected by 1-5 micrograms/kg/h of analog RC-121 or by 5 micrograms/kg/h of S-S-14. Analogs RC-160, RC-121, and RC-98-I (D-Trp-Cys-Phe-D-Trp-Lys-Thr-Cys-Thr-NH2) and others also powerfully inhibited desglugastrin-induced potent as S-S-14 in dogs but its activity was higher in rats. The results indicate that octapeptide analogs which are superactive in GH-inhibition tests are also more potent than S-S-14 in suppressing gastric acid secretion. These findings may be of clinical value.
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Affiliation(s)
- A V Schally
- Endocrine, Polypeptide and Cancer Institute, Veterans Administration Medical Center, New Orleans, LA
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Epstein E, Paulson D, Sprague E, Teisch J. Letter of resignation from the Academy by Drs. Edward Sprague, Ernst Epstein, Donald Paulson, and Joel Teisch. J Am Acad Dermatol 1987; 17:699-701. [PMID: 3668019 DOI: 10.1016/s0190-9622(87)80470-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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Sanjak M, Paulson D, Sufit R, Reddan W, Beaulieu D, Erickson L, Shug A, Brooks BR. Physiologic and metabolic response to progressive and prolonged exercise in amyotrophic lateral sclerosis. Neurology 1987; 37:1217-20. [PMID: 3601086 DOI: 10.1212/wnl.37.7.1217] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Physical work capacity in 35 ALS patients and 6 untrained controls was evaluated during progressive bicycle ergometry. In the ALS patients, maximum oxygen consumption (VO2max) and work capacity (Wmax) drop in relation to the decrease in ALS functional score. However, the oxygen cost (ml O2/kpm) of submaximal exercise was significantly increased. Prolonged submaximal exercise tests in six ALS patients and six matched untrained controls indicated that the exercise-induced increase in plasma free fatty acids, beta-hydroxybutyrate, esterified carnitine, and muscle esterified carnitine was significantly retarded in ALS patients.
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Fowler SA, Paulson D, Owen BA, Owen WG. Binding of iron by factor IX. Possible role for beta-hydroxyaspartic acid. J Biol Chem 1986; 261:4371-2. [PMID: 3957901] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
In concentrations exceeding 1 mg/ml, bovine factor IX exhibits a pink color that arises from a broad absorption band with a lambda max = 500 nm. Analysis by x-ray fluorescence reveals the presence of iron but no other transition metals in the factor IX preparation. Quantitative analysis by atomic absorption spectroscopy indicates that 1 g atom of iron is bound tightly to 1 mol of factor IX. The iron is removed slowly (t1/2 = 3 h) by EDTA. In contrast, prothrombin binds no detectable iron, and factor X binds less than 0.2 g atom/mol. alpha-Hydroxybutyrate chelates Fe3+ with sufficient stability to preclude formation of [Fe(OH)3]n. It is proposed that factor IX binds iron with physiologically significant affinity and that the beta-hydroxyaspartate residue in factor IX is a chelator for the bound metal.
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Fregosi R, Sanguq M, Paulson D, Dempsey JA. DIAPHRAGM, PLANTARIS AND WHOLE ANIMAL BIOENERGETICS WITH ENDURANCE TRAINING. Med Sci Sports Exerc 1985. [DOI: 10.1249/00005768-198504000-00339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Abstract
Inadvertent esophageal intubation during cardiopulmonary resuscitation following aortocoronary bypass grafting resulted in gastric rupture and tension pneumoperitoneum in a 65-year-old patient. Rapid hemodynamic deterioration necessitated emergency laparotomy with successful repair of the gastric rupture. The patient's recovery was uneventful, and he was doing well at six months follow up. Awareness of this unusual complication may lead to early recognition and successful treatment.
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Abstract
Eighty-eight patients with hormone-resistant Stage IV prostate cancer were treated with a five-drug chemotherapy program. Patient demographic data, prior therapy, symptoms, extent of disease, and laboratory studies were analyzed statistically to evaluate the association of these parameters with survival from the onset of chemotherapy. Factors associated with short survival included age greater than 65, severe bone pain, poor performance status, presence of soft tissue metastases, anemia, elevation of serum LDH, SGOT, alkaline and acid phosphatases, and prolactin, and hypoalbuminemia. Race, stage at initial diagnosis, prior radiation therapy, prior orchiectomy, and elevation of CEA had no prognostic association. We suggest that clinical trials of new therapies of hormone-resistant prostate cancer take into account the presence of these prognostic factors in the analysis of the results of therapeutic programs.
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Veith FJ, Torres M, Colon I, Pinsker K, Koerner SK, Crane R, Paulson D. Transplantation of the left lung into the right hemithorax to facilitate immediate reconstitution of bronchial artery flow. J Thorac Cardiovasc Surg 1978; 75:141-6. [PMID: 339004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Immediate bronchial artery reconstitution may be important in the prevention of bronchial anastomotic problems in lung transplantation. To facilitate this reconstitution in circumstances requiring allograft replacement of the right lung, we developed a method for transplanting the left lung together with its bronchial arterial supply into the right hemithorax. With this method, left lungs were allotransplanted into the right hemithorax of nine immunosuppressed dogs. Six recipients survived 1 to 4 weeks. Death resulted from pneumonia or rejection, and there were no bronchial anastomotic problems. Roentgenograms showed that the bronchial artery was patent and that the inverted transplanted left lungs could conform exactly to the thorax without space problems or radiographic abnormalities. Except for the unusual position of the large pulmonary arteries, angiographic patterns, function, and perfusion of the transplanted lungs were often normal and equivalent to those of the recipient's normal left lung. Thus it is possible to transplant a left lung into either hemithorax and immediately reconstitute its bronchial arterial circulation. Bronchial anastomotic problems may thereby be decreased.
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Campbell CF, McNamara JJ, Paulson D, Urschel HC. Surgical management of melanoma of lung, trachea, and bronchi. Tex Med 1968; 64:62-66. [PMID: 5706947] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
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