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Kapoor V, Keiser S, Dadeboyina C, Patel Arora S. Comprehensive molecular profiling in older patients with advanced biliary tract cancers (BTC) in a Latinx-rich cohort. J Geriatr Oncol 2022. [DOI: 10.1016/s1879-4068(22)00278-8] [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: 11/06/2022]
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Harrison AG, Lovett BJ, Keiser S, Armstrong IT. Learning disability documentation submitted by osteopathic medical students. Appl Neuropsychol Adult 2019; 28:245-256. [PMID: 31204522 DOI: 10.1080/23279095.2019.1627358] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
An increasing number of individuals are requesting disability accommodations on high-stakes licensing examinations, and neuropsychological evaluation reports are a frequent component of disability documentation. This study reviewed 103 requests for accommodations based on a learning disability (LD), submitted to the National Board of Osteopathic Medical Examiners between 2013 and 2016 for accommodation on the licensure exams for osteopathic physicians. Depending on criteria employed, anywhere from 84 to 97% of applicants failed to meet recognized criteria for a LD diagnosis, with the vast majority demonstrating academic functioning that was average or better relative to most other individuals in the general population. Thus, although given a disability diagnosis, the majority lacked evidence of substantial impairment that would require accommodations under the Americans with Disabilities Act. Additionally, no significant differences were found between the academic achievement or fluency scores of those requesting 50% as compared to 100% extra time. Finally, many evaluators employed grade-based assessment measures to demonstrate academic impairment, even when candidates' functioning using age-based comparisons was unimpaired. Recommendations for future research and practice based on these and other findings are discussed.
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Affiliation(s)
- Allyson G Harrison
- Regional Assessment & Resource Centre, Queens University, Kingston, Ontario, Canada
| | | | | | - Irene T Armstrong
- Regional Assessment & Resource Centre, Queens University, Kingston, Ontario, Canada
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Robach P, Hansen J, Pichon A, Meinild Lundby AK, Dandanell S, Slettaløkken Falch G, Hammarström D, Pesta DH, Siebenmann C, Keiser S, Kérivel P, Whist JE, Rønnestad BR, Lundby C. Hypobaric live high-train low does not improve aerobic performance more than live low-train low in cross-country skiers. Scand J Med Sci Sports 2018; 28:1636-1652. [DOI: 10.1111/sms.13075] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/13/2018] [Indexed: 01/16/2023]
Affiliation(s)
- P. Robach
- Ecole Nationale des Sports de Montagne; site de l'Ecole Nationale de Ski et d'Alpinisme; Chamonix France
- HP2, Université Grenoble Alpes; Grenoble France
| | - J. Hansen
- Inland Norway University of Applied Sciences; Lillehammer Norway
| | - A. Pichon
- Laboratory Mobility, Aging & Exercise (MOVE) - EA 6314; Faculty of Sport Sciences; University of Poitiers; Poitiers France
| | - A.-K. Meinild Lundby
- The Centre for Physical Activity Research; University Hospital of Copenhagen; Copenhagen Denmark
| | - S. Dandanell
- Center for Healthy Aging; Department of Biomedical Sciences; XLab; University of Copenhagen; Copenhagen Denmark
- Department for Physiotherapy and Occupational Therapy; Metropolitan University College; Copenhagen Denmark
| | | | - D. Hammarström
- Inland Norway University of Applied Sciences; Lillehammer Norway
| | - D. H. Pesta
- Department of Sport Science; Faculty for Sports Science and Psychology; University of Innsbruck; Innsbruck Austria
- Department of Visceral, Transplant, and Thoracic Surgery; D. Swarovski Research Laboratory; Medical University of Innsbruck; Innsbruck Austria
| | - C. Siebenmann
- The Centre for Physical Activity Research; University Hospital of Copenhagen; Copenhagen Denmark
| | - S. Keiser
- Institute of Physiology; University of Zürich; Zürich Switzerland
| | - P. Kérivel
- Ecole Nationale des Sports de Montagne; site de l'Ecole Nationale de Ski et d'Alpinisme; Chamonix France
| | - J. E. Whist
- Innlandet Hospital Trust; Lillehammer Norway
| | - B. R. Rønnestad
- Inland Norway University of Applied Sciences; Lillehammer Norway
| | - C. Lundby
- The Centre for Physical Activity Research; University Hospital of Copenhagen; Copenhagen Denmark
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Dandanell S, Oberholzer L, Keiser S, Andersen AB, Haider T, Hilty MP, Meinild-Lundby AK, Lundby C. Effect of alterations in blood volume with bed rest on glucose tolerance. J Appl Physiol (1985) 2016; 121:1098-1105. [PMID: 27633742 DOI: 10.1152/japplphysiol.00624.2016] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2016] [Accepted: 09/12/2016] [Indexed: 11/22/2022] Open
Abstract
Bed rest leads to rapid impairments in glucose tolerance. Plasma volume and thus dilution space for glucose are also reduced with bed rest, but the potential influence on glucose tolerance has not been investigated. Accordingly, the aim was to investigate whether bed rest-induced impairments in glucose tolerance are related to a concomitant reduction in plasma volume. This hypothesis was tested mechanistically by restoring plasma volume with albumin infusion after bed rest and parallel determination of glucose tolerance. Fifteen healthy volunteers (age 24 ± 3 yr, body mass index 23 ± 2 kg/m2, maximal oxygen uptake 44 ± 8 ml·min-1·kg-1; means ± SD) completed 4 days of strict bed rest. Glucose tolerance [oral glucose tolerance test (OGTT)] and plasma and blood volumes (carbon monoxide rebreathing) were assessed before and after 3 days of bed rest. On the fourth day of bed rest, plasma volume was restored by means of an albumin infusion prior to an OGTT. Plasma volume was reduced by 9.9 ± 3.0% on bed rest day 3 and area under the curve for OGTT was augmented by 55 ± 67%. However, no association (R2 = 0.09, P = 0.33) between these simultaneously occurring responses was found. While normalization of plasma volume by matched albumin administration (408 ± 104 ml) transiently decreased (P < 0.05) resting plasma glucose concentration (5.0 ± 0.4 to 4.8 ± 0.3 mmol/l), this did not restore glucose tolerance. Bed rest-induced alterations in dilution space may influence resting glucose values but do not affect area under the curve for OGTT.
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Affiliation(s)
- S Dandanell
- Institute of Physiology, University of Zürich, Zurich, Switzerland; and
| | - L Oberholzer
- Institute of Physiology, University of Zürich, Zurich, Switzerland; and
| | - S Keiser
- Institute of Physiology, University of Zürich, Zurich, Switzerland; and
| | - A B Andersen
- Institute of Physiology, University of Zürich, Zurich, Switzerland; and
| | - T Haider
- Institute of Physiology, University of Zürich, Zurich, Switzerland; and
| | - M P Hilty
- Intensive Care Unit, University Hospital of Zürich, Zurich, Switzerland
| | | | - C Lundby
- Institute of Physiology, University of Zürich, Zurich, Switzerland; and
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Keiser S, Flück D, Stravs A, Hüppin F, Lundby C. Restoring heat stress-associated reduction in middle cerebral artery velocity does not reduce fatigue in the heat. Scand J Med Sci Sports 2016; 25 Suppl 1:145-53. [PMID: 25943665 DOI: 10.1111/sms.12345] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/21/2014] [Indexed: 11/27/2022]
Abstract
Heat-induced hyperventilation may reduce PaCO2 and thereby cerebral perfusion and oxygenation and in turn exercise performance. To test this hypothesis, eight volunteers completed three incremental exercise tests to exhaustion: (a) 18 °C ambient temperature (CON); (b) 38 °C (HEAT); and (c) 38 °C with addition of CO2 to inspiration to prevent the hyperventilation-induced reduction in PaCO2 (HEAT + CO2 ). In HEAT and HEAT + CO2 , rectal temperature was elevated prior to the exercise tests by means of hot water submersion and was higher (P < 0.05) than in CON. Compared with CON, ventilation was elevated (P < 0.01), and hence, PaCO2 reduced in HEAT. This caused a reduction (P < 0.05) in mean cerebral artery velocity (MCAvmean ) from 68.6 ± 15.5 to 53.9 ± 10.0 cm/s, which was completely restored in HEAT + CO2 (68.8 ± 5.8 cm/s). Cerebral oxygenation followed a similar pattern. V ˙ O 2 m a x was 4.6 ± 0.1 L/min in CON and decreased (P < 0.05) to 4.1 ± 0.2 L/min in HEAT and remained reduced in HEAT + CO2 (4.1 ± 0.2 L/min). Despite normalization of MCAvmean and cerebral oxygenation in HEAT + CO2 , this did not improve exercise performance, and thus, the reduced MCAvmean in HEAT does not seem to limit exercise performance.
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Affiliation(s)
- S Keiser
- Zurich Center for Integrative Human Physiology (ZIHP), Zurich, Switzerland; Institute of Physiology, University of Zurich, Zurich, Switzerland
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Siebenmann C, Cathomen A, Hug M, Keiser S, Lundby AK, Hilty MP, Goetze JP, Rasmussen P, Lundby C. Hemoglobin mass and intravascular volume kinetics during and after exposure to 3,454-m altitude. J Appl Physiol (1985) 2015; 119:1194-201. [DOI: 10.1152/japplphysiol.01121.2014] [Citation(s) in RCA: 73] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2014] [Accepted: 02/25/2015] [Indexed: 01/14/2023] Open
Abstract
High altitude (HA) exposure facilitates a rapid contraction of plasma volume (PV) and a slower occurring expansion of hemoglobin mass (Hbmass). The kinetics of the Hbmass expansion has never been examined by multiple repeated measurements, and this was our primary study aim. The second aim was to investigate the mechanisms mediating the PV contraction. Nine healthy, normally trained sea-level (SL) residents (8 males, 1 female) sojourned for 28 days at 3,454 m. Hbmass was measured and PV was estimated by carbon monoxide rebreathing at SL, on every 4th day at HA, and 1 and 2 wk upon return to SL. Four weeks at HA increased Hbmass by 5.26% (range 2.5-11.1%; P < 0.001). The individual Hbmass increases commenced with up to 12 days of delay and reached a maximal rate of 4.04 ± 1.02 g/day after 14.9 ± 5.2 days. The probability for Hbmass to plateau increased steeply after 20–24 days. Upon return to SL Hbmass decayed by −2.46 ± 2.3 g/day, reaching values similar to baseline after 2 wk. PV, aldosterone concentration, and renin activity were reduced at HA ( P < 0.001) while the total circulating protein mass remained unaffected. In summary, the Hbmass response to HA exposure followed a sigmoidal pattern with a delayed onset and a plateau after ∼3 wk. The decay rate of Hbmass upon descent to SL did not indicate major changes in the rate of erythrolysis. Moreover, our data support that PV contraction at HA is regulated by the renin-angiotensin-aldosterone axis and not by changes in oncotic pressure.
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Affiliation(s)
- C. Siebenmann
- Center for Integrative Human Physiology, Institute of Physiology, University of Zürich, Zürich, Switzerland
- Department of Environmental Physiology, School of Technology and Health, Royal Institute of Technology, Solna, Sweden
| | - A. Cathomen
- Institute of Human Movement Sciences and Sport, ETH Zürich, Zürich, Switzerland
| | - M. Hug
- Center for Integrative Human Physiology, Institute of Physiology, University of Zürich, Zürich, Switzerland
| | - S. Keiser
- Center for Integrative Human Physiology, Institute of Physiology, University of Zürich, Zürich, Switzerland
| | - A. K. Lundby
- Center for Integrative Human Physiology, Institute of Physiology, University of Zürich, Zürich, Switzerland
| | - M. P. Hilty
- Intensive Care Unit, University Hospital of Zürich, Zürich, Switzerland
| | - J. P. Goetze
- Department of Clinical Biochemistry, Copenhagen, and Aarhus University, Aarhus, Denmark
| | | | - C. Lundby
- Center for Integrative Human Physiology, Institute of Physiology, University of Zürich, Zürich, Switzerland
- Food and Nutrition and Sport Science, Gothenburg University, Gothenburg, Sweden
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Parrish MR, Murphy SR, Rutland S, Wallace K, Wenzel K, Wallukat G, Keiser S, Ray LF, Dechend R, Martin JN, Granger JP, LaMarca B. The effect of immune factors, tumor necrosis factor-alpha, and agonistic autoantibodies to the angiotensin II type I receptor on soluble fms-like tyrosine-1 and soluble endoglin production in response to hypertension during pregnancy. Am J Hypertens 2010; 23:911-6. [PMID: 20431529 DOI: 10.1038/ajh.2010.70] [Citation(s) in RCA: 109] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND Preeclampsia is considered a disease of immunological origin associated with abnormalities in inflammatory cytokines, tumor necrosis factor-alpha (TNF-alpha), and activated lymphocytes secreting autoantibodies to the angiotensin II receptor (AT1-AA). Recent studies have also demonstrated that an imbalance of angiogenic factors, soluble fms-like tyrosine kinase (sFlt-1), and sEndoglin, exists in preeclampsia; however, the mechanisms that initiate their overproduction are unclear. METHODS To determine the role of immune regulation of these factors, circulating and placental sFlt-1 and/or sEndoglin was examined from pregnant rats chronically treated with TNF-alpha or AT1-AA. On day 19 of gestation blood pressure was analyzed and serum and tissues were collected. Placental villous explants were excised and cultured on matrigel coated inserts for 24 h and sFlt-1 and sEndoglin was measured from media. RESULTS In response to TNF-alpha-induced hypertension, sFlt-1 increased from 180 +/- 5 to 2,907 +/- 412 pg/ml. sFlt-1 was also increased from cultured placental explants of TNF-alpha induced hypertensive pregnant rats (n = 12) (2,544 +/- 1,132 pg/ml) vs. explants from normal pregnant (NP) rats (n = 12) (2,189 +/- 586 pg/ml) where as sEng was undetectable. Circulating sFlt-1 increased from 245 +/- 38 to 3,920 +/- 798 pg/ml in response to AT1-AA induced hypertension. sFlt-1 levels were higher (3,400 +/- 350 vs. 2,480 +/- 900 pg/ml) in placental explants from AT1-AA infused rats (n = 12) than NP rats (n = 7). In addition, sEndoglin increased from 30 +/- 2.7 to 44 +/- 3.3 pg/ml (P < 0.047) in AT1-AA infused rats but was undetectable in the media of the placental explants. CONCLUSIONS These data suggest that immune factors may serve as an important stimulus for both sFlt-1 and sEndoglin production in response to placental ischemia.
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Abstract
The number of students identified since the mid-1970s as having learning disabilities has produced a corresponding increase in the population of such individuals in postsecondary programs. The Americans with Disabilities Act, along with Section 504 of the Vocational Rehabilitation Act of 1973, provide the basis for civil rights for students in higher education. These laws protect individuals who have a substantial limitation in a major life activity when compared with the general population. A disparity between the legal definition and the clinical definition of learning disabilities, which can encompass those identified on the basis of academic underachievement relative to intellectual potential, has stimulated debate about the fairest, most appropriate standard for declaring a student functionally impaired. Extending services to individuals without significant academic impairment may tax or even deplete scarce resources for others in greater needs, distort the normal processes by which individuals select careers, and diminish the credibility of the diagnosis itself.
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Affiliation(s)
- M Gordon
- SUNY Health Science Center, Syracuse, NY 13210, USA
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Uhlig E, Keiser S. Palladium(II)-Komplexe des ?-(Diphenylphosphino)-�thylpyridins-(2) und des ?-(Diphenylarsino)-�thylpyridins-(2). Z Anorg Allg Chem 1974. [DOI: 10.1002/zaac.19744060102] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Keiser S, Bräuniger H. [Synthesis of 4(7)-aminobenzimidazole and its derivatives. 8. Benzazole glycosides]. Pharmazie 1972; 27:287-90. [PMID: 4647554] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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Keiser S, Console WA. Sidney Tarachow, M.D. 1908-1965. J Am Psychoanal Assoc 1966; 14:858-9. [PMID: 5339602 DOI: 10.1177/000306516601400411] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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