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Uleberg O, Pape K, Kristiansen T, Romundstad PR, Klepstad P. Population-based analysis of the impact of trauma on longer-term functional outcomes. Br J Surg 2018; 106:65-73. [PMID: 30221344 DOI: 10.1002/bjs.10965] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Revised: 05/14/2018] [Accepted: 06/30/2018] [Indexed: 11/06/2022]
Abstract
BACKGROUND Functional outcome measures are important as most patients survive trauma. The aim of this study was to describe the long-term impact of trauma within a healthcare region from a social perspective. METHODS People active in work or education and admitted to hospitals in Central Norway in the interval 1 June 2007 to 31 May 2010 after sustaining trauma were included in the study. Clinical data were linked to Norwegian national registers of cause of death, sickness and disability benefits, employment and education. Primary outcome measures were receipt of medical benefits and time to return to preinjury work level. Secondary outcome measures were mortality within 30 days or during follow-up. RESULTS Some 1191 patients were included in the study, of whom 193 (16·2 per cent) were severely injured (Injury Severity Score greater than 15). Five years after injury, the prevalence of medical benefits was 15·6 per cent among workers with minor injuries, 22·3 per cent in those with moderate injuries and 40·5 per cent among workers with severe injuries. The median time after injury until return to work was 1, 4 and 11 months for patients with minor, moderate and severe injuries respectively. Twelve patients died within 30 days and an additional 17 (1·4 per cent) during follow-up. CONCLUSION Patients experiencing minor or major trauma received high levels of medical benefits; however, most recovered within the first year and resumed preinjury work activity. Patients with severe trauma were more likely to receive medical benefits and have a delayed return to work. Registration number: NCT02602405 (http://www.clinicaltrials.gov).
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Affiliation(s)
- O Uleberg
- Department of Emergency Medicine and Pre-Hospital Services, St Olav's University Hospital, Trondheim, Norway.,Department of Circulation and Medical Imaging, Norwegian University of Science and Technology, Trondheim, Norway.,Department of Research and Development, Norwegian Air Ambulance Foundation, Drøbak, Norway
| | - K Pape
- Department of Public Health, Faculty of Medicine and Health Sciences, NTNU, Norwegian University of Science and Technology, Trondheim, Norway
| | - T Kristiansen
- Department of Anaesthesiology, Division of Emergencies and Critical Care, Oslo University Hospital, Rikshospitalet, Oslo, Norway
| | - P R Romundstad
- Department of Public Health, Faculty of Medicine and Health Sciences, NTNU, Norwegian University of Science and Technology, Trondheim, Norway
| | - P Klepstad
- Department of Anaesthesiology and Intensive Care Medicine, St Olav's University Hospital, Trondheim, Norway.,Department of Circulation and Medical Imaging, Norwegian University of Science and Technology, Trondheim, Norway
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2
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Uleberg O, Kristiansen T, Pape K, Romundstad PR, Klepstad P. Trauma care in a combined rural and urban region: an observational study. Acta Anaesthesiol Scand 2017; 61:346-356. [PMID: 28111748 DOI: 10.1111/aas.12856] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Revised: 12/17/2016] [Accepted: 12/29/2016] [Indexed: 02/03/2023]
Abstract
BACKGROUND The available information on trauma care in mixed rural-urban areas with scattered populations is limited. The aim of this study is to describe epidemiology, resource use, transfers and outcomes for trauma care within such an area, prior to implementation of a formal trauma system. METHODS A multicentre observational study including potential severely injured patients from June 2007 to May 2010. All patients received by trauma teams at seven acute care hospitals (ACH) and one major trauma centre (MTC) were included. Major trauma was defined as Injury Severity Score (ISS) > 15. RESULTS A total of 2323 patients were included. ACH received 1330 patients and delivered definite care to 85% of these. Only 329 (14%) patients were major trauma of which 134 (41%) were initially received at an ACH. Nine per cent of patients were transferred between hospitals. After inter-hospital transfers, 79% of all major trauma patients received definite care at the MTC. Helicopter emergency services admitted 52% of major trauma and performed 68% of inter-hospital transfers from ACH to MTC. Forty-eight patients (2%) died within 30 days. CONCLUSION In a region with a dispersed network of hospitals, geographical challenges, and low rate of major trauma cases, efforts should be made to identify patients with major trauma for treatment at a MTC as early as possible. This can be done by implementing triage and transfer guidelines, maintaining competence at ACHs for initial stabilization, and sustaining an organization for effective inter-facility transfers.
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Affiliation(s)
- O. Uleberg
- Department of Emergency Medicine and Pre-Hospital Services; St. Olav's University Hospital; Trondheim Norway
- Department of Circulation and Medical Imaging; Faculty of medicine; NTNU; Norwegian University of Science and Technology; Trondheim Norway
| | - T. Kristiansen
- Department of Anaesthesiology; Division of Emergencies and Critical Care; Oslo University Hospital; Oslo Norway
| | - K. Pape
- Department of Public Health; Faculty of medicine; NTNU; Norwegian University of Science and Technology; Trondheim Norway
| | - P. R. Romundstad
- Department of Public Health; Faculty of medicine; NTNU; Norwegian University of Science and Technology; Trondheim Norway
| | - P. Klepstad
- Department of Circulation and Medical Imaging; Faculty of medicine; NTNU; Norwegian University of Science and Technology; Trondheim Norway
- Department of Anaesthesiology and Intensive Care Medicine; St. Olav's University Hospital; Trondheim Norway
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3
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Folkedal O, Pettersen JM, Bracke MBM, Stien LH, Nilsson J, Martins C, Breck O, Midtlyng PJ, Kristiansen T. On-farm evaluation of the Salmon Welfare Index Model (SWIM 1.0): theoretical and practical considerations. Anim Welf 2016. [DOI: 10.7120/09627286.25.1.135] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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4
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Leisner J, Lund T, Frandsen E, Andersen N, Fredslund L, Nguyen V, Kristiansen T. What consumers expect from food control and what they get – A case study of the microbial quality of sushi bars in Denmark. Food Control 2014. [DOI: 10.1016/j.foodcont.2014.04.017] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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5
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Kristensen P, Kristiansen T, Rehn M, Gravseth HM, Bjerkedal T. Fatal road traffic injuries at age 16-20 years among 611 654 persons born in Norway 1967-1976: multilevel cohort study. Inj Prev 2010. [DOI: 10.1136/ip.2010.029215.559] [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: 11/04/2022]
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Kristiansen T, Jorgensen C, Lough RG, Vikebo F, Fiksen O. Modeling rule-based behavior: habitat selection and the growth-survival trade-off in larval cod. Behav Ecol 2009. [DOI: 10.1093/beheco/arp023] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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8
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Okulate MA, Kalume DE, Reddy R, Kristiansen T, Bhattacharyya M, Chaerkady R, Pandey A, Kumar N. Identification and molecular characterization of a novel protein Saglin as a target of monoclonal antibodies affecting salivary gland infectivity of Plasmodium sporozoites. Insect Mol Biol 2007; 16:711-22. [PMID: 18093000 DOI: 10.1111/j.1365-2583.2007.00765.x] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Molecular mechanisms underlying the interaction between malarial sporozoites and putative receptor(s) on the salivary glands of Anopheles gambiae remain largely unknown. In previous studies, a salivary gland protein of ~100 kDa was identified as a putative target based on recognition of the protein by a monoclonal antibody (mAb) 2A3 that caused a >/= 70% reduction in the average number of sporozoites per infected salivary gland when fed to mosquitoes. Using affinity purification we purified the target of this mAb from extracts of female A. gambiae salivary glands and it was found to be a novel protein by tandem mass spectrometric analysis. Biochemical and molecular characterization of the 100 kDa protein showed that this molecule, designated Saglin, exists as a disulphide-bonded homodimer of 50 kDa subunits. The ability to form homodimers was retained even in the recombinant Saglin expressed in mammalian cells (HEK293). The amino acid sequence of Saglin contains a signal peptide suggesting that Saglin is a secreted protein. If Saglin is indeed involved in the process of invasion of A. gambiae salivary glands by sporozoites of Plasmodium, it could provide a novel target for future investigations aimed at interruption of malaria transmission.
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Affiliation(s)
- M A Okulate
- Department of Molecular Microbiology and Immunology, Johns Hopkins Malaria Research Institute, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
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9
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Kristiansen T. [Recruitment--untraditional hunt for nurse specialists]. Tidsskr Sykepl 1997; 85:24-5. [PMID: 9355642] [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: 02/05/2023]
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10
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Hansen C, Kristiansen T, Christoffersen T. High prevalence of myopia among medical students? Acta Ophthalmol 1993; 71:429. [PMID: 8362650 DOI: 10.1111/j.1755-3768.1993.tb07164.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: 01/30/2023]
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11
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Halsey D, Fleming B, Pope MH, Krag M, Kristiansen T. External fixator pin design. Clin Orthop Relat Res 1992:305-12. [PMID: 1563166] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The integrity of the bone-pin interface is the critical link in the stability of external fixation systems. External fixation pins placed in cancellous metaphyseal bone frequently loosen over time, resulting in fixation failure and an increased risk of infection. To design an external fixation pin with optimal bone-metal interface strength in cancellous bone, a systematic study of various thread design features was performed. Combinations of pitch, tooth profile, and minor diameter in 5 mm self-tapping half pins were evaluated in coaxial pullout testing using a fresh bovine cancellous bone. A significant increase in pullout strength was found with a decrease in minor diameter. No statistical differences were found in pullout strength attributable to thread profile and pitch. There were no significant interactions between minor diameter and tooth profile or minor diameter and pitch. The data obtained suggest significantly greater holding power in cancellous bone can be achieved by using an external fixation pin with a smaller minor diameter or a larger interference. Additional pullout testing of five commercially available external fixator pins was performed. Of these, the two pins with the largest interference demonstrated greater pullout strength. Therefore, within a range of acceptable major diameters and adequate minor diameters for the torsional strength requirements, an optimal interference for cancellous pin application may exist and it may well be larger than that present in currently available external fixation pins.
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Affiliation(s)
- D Halsey
- University of Vermont College of Medicine, McClure Musculoskeletal Research Center, Department of Orthopaedics and Rehabilitation, Burlington 05401
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12
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Paley D, Fleming B, Catagni M, Kristiansen T, Pope M. Mechanical evaluation of external fixators used in limb lengthening. Clin Orthop Relat Res 1990:50-7. [PMID: 2293944] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Four external fixator systems (five configurations) used for limb lengthening were tested to determine the fixator stiffness and the fracture gap rigidity. There was a statistical difference between fixators in all modes of loading with respect to stiffness, shear, and axial motion. The fixators were graded to determine their relative stiffness, shear rigidity, and axial rigidity. The EBI Orthofix proved to be the most rigid fixator relative to the configurations tested with minimal shear or axial motion at the fracture site. The Ilizarov tibial configuration was the least rigid, demonstrating more shear and axial motion at the fracture gap. The Ilizarov femoral system combined excellent stability and shear resistance with preservation of axial dynamization. Fixators with a high stiffness provide less motion at the fracture site, which may cause stress shielding of the osteotomy. Fixators that provide more motion at the fracture gap are less stable. These data may be useful in determining which fixator may be ideal for a particular clinical situation.
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Affiliation(s)
- D Paley
- University of Maryland Hospital, Baltimore, Division of Orthopaedic Surgery 21201
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13
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Fleming B, Paley D, Kristiansen T, Pope M. A biomechanical analysis of the Ilizarov external fixator. Clin Orthop Relat Res 1989:95-105. [PMID: 2924484] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Five configurations of the Ilizarov fixator were analyzed in vitro. The overall stiffness, shear stiffness, and axial motion of the fracture site were determined. The data were compared with the results of eight conventional one-half frame fixators previously tested in the same manner. The Ilizarov fixator allowed significantly more axial motion at the fracture site during axial compression than the other fixators tested. The overall stiffness and shear rigidity of the Ilizarov external fixator were similar to those of the one-half pin fixators in bending and torsion. The stability of the Ilizarov fixator was a function of bone position within the fixator rings and fixation wire tension. The use of olive stop wires increased the shear resistance of the Ilizarov system.
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Affiliation(s)
- B Fleming
- Department of Orthopaedics, University of Vermont, Burlington 05405
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14
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Kristiansen T, Fleming B, Neale G, Reinecke S, Pope MH. Comparative study of fracture gap motion in external fixation. Clin Biomech (Bristol, Avon) 1987; 2:191-5. [PMID: 23915753 DOI: 10.1016/0268-0033(87)90080-5] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/29/1986] [Revised: 06/02/1987] [Indexed: 02/07/2023]
Abstract
Different external fixators demonstrated different motion patterns at the fracture site in AP bending. This indicates that fracture gap motion patterns cannot be predicted from a single value of overall frame stiffness. This type of information may be useful in examining existing theories of fracture healing in response to different types of fracture gap motion.
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Affiliation(s)
- T Kristiansen
- McClure Musculoskeletal Research Center, Department of Orthopaedics and Rehabilitation, University of Vermont, Burlington, VT 05405, USA
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15
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Hørby-Petersen J, Kristiansen T, Jelnes R. Acute appendicitis caused by metallic foreign body (bullet). Case report. Acta Chir Scand 1987; 153:697-8. [PMID: 3324597] [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: 01/05/2023]
Abstract
In a patient who had sustained bullet wounding 9 years previously, acute appendicitis was associated with presence of a bullet in the appendix. The case is described.
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Affiliation(s)
- J Hørby-Petersen
- Department of Gastroenterologic Surgery D, Gentofte Hospital, University of Copenhagen, Hellerup, Denmark
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16
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Flick AB, Herbert JC, Goodell J, Kristiansen T. Noncommercial fabrication of antibiotic-impregnated polymethylmethacrylate beads. Technical note. Clin Orthop Relat Res 1987:282-6. [PMID: 3652588] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Antibiotic-impregnated polymethylmethacrylate (PMMA) beads were fabricated by means of injections in specially designed molds to produce small and large beads. In vitro concentrates from these beads for 30 days were found to release tobramycin in an exponential function.
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Affiliation(s)
- A B Flick
- Department of Orthopaedics and Rehabilitation, University of Vermont College of Medicine, Burlington
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17
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Pope MH, Johnson RJ, Lavalette R, Kristiansen T. Variations in the examination of the medial collateral ligament of the knee. Clin Biomech (Bristol, Avon) 1987; 2:71-3. [PMID: 23915647 DOI: 10.1016/0268-0033(87)90130-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/05/1986] [Revised: 12/06/1986] [Indexed: 02/07/2023]
Abstract
Five male patients with resolving moderately severe media collateral ligament injuries of the knee and five uninjured males were examined for knee ligament laxity by three examiners. The examiners were unaware of the identity of the subjects. The examiners had good intra-observer repeatibility, but there was poor agreement between examiners. There was no clinically identifiable difference in laxity between uninjured and previously injured knees in this series.
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Affiliation(s)
- M H Pope
- Department of Orthopaedics and Rehabilitation, University of Vermont, Burlington, VT 05405, USA
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18
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Holmberg I, Kristiansen T, Sturén M. Determination of 25-hydroxyvitamin D3 in serum by high performance liquid chromatography and isotope dilution-mass spectrometry. Scand J Clin Lab Invest 1984; 44:275-82. [PMID: 6379844 DOI: 10.3109/00365518409083808] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Four different HPLC methods for analysis of 25-hydroxyvitamin D3 in serum were evaluated with a method based on isotope dilution-mass spectrometry (ID-MS). Method I utilized Sephadex LH-20 chromatography as the only prepurification step. No correlation with the ID-MS method was obtained. Method II utilized Sephadex LH-20 chromatography and a subsequent reversed phase HPLC step as prepurification. The correlation coefficient was 0.99 (regression coefficient 1.2 and intercept - 3.9 micrograms/l). Method III included open silicic acid chromatography and straight phase HPLC as prepurification. The correlation when compared with the ID-MS method was 0.94 (regression coefficient 1.2 and intercept - 0.4 micrograms/l). In method IV Sep-pak C18 chromatography and open silicic acid chromatography were used as prepurification. The correlation coefficient when compared with the ID-MS method was 0.97 (regression coefficient 0.8 and intercept 0.1 microgram/l). It is concluded that a single Sephadex LH-20 step is not sufficient as prepurification and that method IV had an accuracy sufficient for its intended use to analyse 25-hydroxyvitamin D3 in serum from cattle.
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19
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Kristiansen T, Seligson D, Blakeslee M. Hip arthrograms following femoral intramedullary nailing. Unfallheilkunde 1984; 87:129-31. [PMID: 6719631] [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: 01/21/2023]
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20
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Hove K, Kristiansen T. Oral 1,25-dihydroxyvitamin D3 in prevention of milk fever. Acta Vet Scand 1984; 25:510-25. [PMID: 6549494 PMCID: PMC8287454] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2023] Open
Abstract
The effect of daily oral doses of 1,25-dihydroxy vitamin D3 (1,25-(OH)2D3) on plasma mineral concentrations and incidence of milk fever was tested in 39 aged cows. Three dose levels of 1,25-(OH)2D3 (0, 100 and 200 µg/d) were compared in cows supplemented with 100 g Ca/d (250 g CaCO3) and in cows receiving no Ca supplement. 1,25-(OH)2D3 treatments were given from day 5 before expected calving (day –5) until the day after calving (Calving = day 0). Expected minima in Ca concentrations in plasma were seen on day 1 in placebo treated cows, while Ca concentrations in 1,25-(OH)2D3 treated cows were normal or increased in the period from start of treatment until day 3–5. In the parturient period (day –1 to +2) 1 of 21 treated cows developed milk fever, as compared to 4 of 18 untreated. A pronounced hypocalcaemia developed, however, in the 1,25-(OH)2D3 treated cows from day 3 to 5 onwards, culminating day 8–11 with 7 cases of milk fever. Ca supplements reduced the development of hypocalcaemia in the 1,25-(OH)2D3 treated cows, but could not completely prevent the occurrence of milk fever.
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21
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Kristiansen T, Sparrman M, Heller L. Towards a subunit influenza vaccine prepared by affinity chromatography on immobilized lectin. J Biosci 1983. [DOI: 10.1007/bf02702985] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Kårsnäs P, Moreno-Lopez J, Kristiansen T. Bovine viral diarrhea virus: purification of surface proteins in detergent-containing buffers by fast protein liquid chromatography. J Chromatogr A 1983; 266:643-9. [PMID: 6313724 DOI: 10.1016/s0021-9673(01)90934-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Bovine viral diarrhea virus was purified by lectin chromatography. The glycoprotein peplomers were dissociated from the virion by treatment with detergent. By a second lectin gel chromatography the glycoconjugates containing terminal galactose were prepared. In combination with lectin affinity chromatography, ion-exchange chromatography on Mono-Q in the presence of the low-UV-absorbing detergent Berol 172 proved to be a powerful technique both for analytical and preparative applications.
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Abstract
Norwegian Red cows 4 yr or older were fed a high calcium diet the last 2 to 4 wk before calving to increase the severity of hypocalcemia at parturition. An oral dose of pellets of fat-encapsulated 1,25-dihydroxyvitamin D3 (500 micrograms) was given to 15 cows and placebo pellets to 12 cows. Treated cows were grouped according to time of treatment, 1) 4 cows treated within 24 h of calving, 2) 8 cows treated 1 to 3 days before, and 3) 3 cows treated 4 to 5 days before calving. Minerals in blood plasma were measured from day -10 to day +10 (calving: day 0). Average calcium concentration of cows treated 1 to 3 days before calving decreased from 2.6 to 2.4 and of placebo treated from 2.5 to 1.8 mmol/liter from day -1 to day +1. Treatment with 1,25-dihydroxyvitamin D3 at other times did not protect against hypocalcemia. Average concentrations of 1,25-dihydroxyvitamin D in plasma were 200 to 250 pg/ml on days -2 and -1 in 5 cows treated on days -3 and -2. Similar concentrations were reached by placebo cows 1 to 2 days after parturition. A single oral dose of 500 micrograms 1,25-dihydroxyvitamin D3 given 1 to 3 days before parturition can prevent hypocalcemia at calving. Difficulties in judging actual time for parturition led to optimal treatment of only 8 of 15 cows.
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Ochoa JL, Kristiansen T. Purification and partial characterization of an agglutinin from Phaseolus coccineus var. 'alubia'. Biochim Biophys Acta 1982; 705:396-404. [PMID: 7126589 DOI: 10.1016/0167-4838(82)90262-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
An agglutination from seeds of 'alubia', a Mexican strain of Phaseolus coccineus, has been purified by affinity chromatography using physically entrapped stroma. The protein appears to be homogeneous by electrophoresis, molecular sieve chromatography and ultracentrifugation. A molecular species of approx. Mr 112,000, with S values of 6.25, 4.52, 4.63 and 4.65 at pH 2.5, 4.5, 7.0 and 9.5, respectively, consisting of four similar subunits (28 kDa), and containing 20% W/W glucosamine, is found to be responsible for the hemagglutinating capacity of 'alubia' extracts. No sugar able to inhibit agglutination has been found. The possibility that hemagglutination by Ph. coccineus var. 'alubia' involves cell receptors other than simple carbohydrate structures must therefore be considered.
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25
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Frymoyer JW, Pope MH, Kristiansen T. Skiing and spinal trauma. Clin Sports Med 1982; 1:309-18. [PMID: 7187312] [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] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Spinal injury in skiers can either be acute or chronic. Acute spinal injury accounts for 3 to 3.6 per cent of all injuries occurring in Alpine skiing. Fewer acute injuries occur in cross-country skiing, and those that do usually are the result of a sudden, compressive force from a seated fall. The prevalence of chronic spinal trauma in skiing is unknown. Both cross-country and Alpine skiers appear to have greater complaints of mild to moderate low back pain as compared with their nonskiing counterparts. These differences may be the result of a complex interaction between recreational and occupational activities. Theoretical analyses suggest a risk for low-grade torsional injury to the Alpine skier's spine, whereas in cross-country skiing significant shear forces are applied to lumbar discs during the kick but not the double-poling phase.
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Abstract
Attempts were made to purify bovine viral diarrhea virus by chromatography on Crotalaria juncea lectin coupled to Sepharose 2B. A recovery of abut 65% of viral infectivity after desorption was obtained. Electron microscopy revealed mostly de-enveloped particles, rather uniform in appearance but differing in size. Immunodiffusion tests with immune calf sera showed precipitation lines of identity between the desorbed virus and extracts from infected cell cultures.
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Böyum A, Lövhaug D, Viken KE, Kristiansen T. Medium conditioned for 24 hours by mononuclear human blood cells contains an inducer of granulopoiesis lacking colony stimulating activity. Scand J Haematol 1980; 25:385-93. [PMID: 6971476 DOI: 10.1111/j.1600-0609.1981.tb01418.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Regulation of granulocyte and macrophage formation was studied by a modified CFU-C assay. Mouse bone marrow cells were cultured in methylcellulose in vitro. After colony counting on d 7, the cells were washed out to determine the total cell number per plate, and the distribution of granulocytes and macrophages in smears. By this procedure it was possible to study pathway-specific regulators. The colony stimulating factor in medium conditioned by mouse L-cells appeared specific for the macrophage cell line; 99% of the colony cells were macrophages. Medium conditioned for 24 h by mononuclear cells from human blood, had no colony forming capacity, but increased colony size and generated significant granulocyte production when combined with L-CSF. This granulopoiesis inducing factor was thermo-labile, and was mostly retained by an Amicon filter separating molecules at 100 000 daltons.
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Abstract
Abstract
We describe a specific assay of 1,25-dihydroxy vitamin D3 in human serum, based on isotope dilution-mass fragmentography. We added [26-2H3]-1,25-dihydroxy vitamin D3 to a fixed amount of serum. The steroids were extracted with chloroform/methanol and purified by liquid chromatography. The purified materal was converted into the trimethylsilyl ether and analyzed. Unlabeled 1,25-dihydroxy vitamin D3 was quantitated from the ratio between the tracings at m/e 452 and 455. The two ions used correspond to loss of two trimethylsilyloxo functions from the molecular ion. Essentially the same results, with some problems of interference, were obtained when we used the more intense ions at m/e 131 and 134 (corresponding to cleavage between C-24 and C-25). The detection limit was about 5 ng/L of serum; the coefficient of variation was about 6%. The accuracy of the method was assessed by recovery experiments. 1,25-Dihydroxy vitamin D3 in sera from 15 healthy subjects was found to average 55 +/- 10 ng/L(+/- SD). We believe this represents the first determination of 1,25-dihydroxy vitamin D3 in serum by use of a method not based on radioimmunoassay or receptor assay. Slightly lower values have been reported by those latter techniques.
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Björkhem I, Holmberg I, Kristiansen T, Pedersen JI. Assay of 1,25-dihydroxy vitamin D3 by isotope dilution--mass fragmentography. Clin Chem 1979; 25:584-8. [PMID: 466767] [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] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
We describe a specific assay of 1,25-dihydroxy vitamin D3 in human serum, based on isotope dilution-mass fragmentography. We added [26-2H3]-1,25-dihydroxy vitamin D3 to a fixed amount of serum. The steroids were extracted with chloroform/methanol and purified by liquid chromatography. The purified materal was converted into the trimethylsilyl ether and analyzed. Unlabeled 1,25-dihydroxy vitamin D3 was quantitated from the ratio between the tracings at m/e 452 and 455. The two ions used correspond to loss of two trimethylsilyloxo functions from the molecular ion. Essentially the same results, with some problems of interference, were obtained when we used the more intense ions at m/e 131 and 134 (corresponding to cleavage between C-24 and C-25). The detection limit was about 5 ng/L of serum; the coefficient of variation was about 6%. The accuracy of the method was assessed by recovery experiments. 1,25-Dihydroxy vitamin D3 in sera from 15 healthy subjects was found to average 55 +/- 10 ng/L(+/- SD). We believe this represents the first determination of 1,25-dihydroxy vitamin D3 in serum by use of a method not based on radioimmunoassay or receptor assay. Slightly lower values have been reported by those latter techniques.
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Abstract
The hydrophobicity of Concanavalin A has been estimated by its tendency to adsorb to hydrophobic adsorbents. Experiments varying temperature, salt concentration and hydrophobicity of the absorbent were consistent with accepted criteria of hydrophobic interaction between biomolecules and hydrophobic ligands. The biological significance of the hydrophobic character of Concanavalin A is also discussed.
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Teigen B, Kristiansen T. [Operating room nurses' seminar: special education and recruitment in the center of discussion]. Sykepleien 1978; 65:984-5. [PMID: 250944] [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: 12/14/2022]
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Fardy PS, Maresh CM, Abbott R, Kristiansen T. A comparison of habitual lifestyle, aerobic power in systolic time intervals in former athletes and non-athletes. J Sports Med Phys Fitness 1978; 18:287-99. [PMID: 732305] [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: 12/24/2022]
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Fardy PS, Maresh CM, Abbott R, Kristiansen T. An assessment of the influence of habitual physical activity, prior sport participation, smoking habits, and aging upon indices of cardiovascular fitness: preliminary report of a cross-sectional and retrospective study. J Sports Med Phys Fitness 1976; 16:77-90. [PMID: 1085847] [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: 12/25/2022]
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Maresh CM, Fardy PS, Abbott RD, Kristiansen T. CARDIOVASCULAR FUNCTION AS INFLUENCED BY CIGARETTE SMOKING. Med Sci Sports Exerc 1976. [DOI: 10.1249/00005768-197621000-00027] [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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Kristiansen T. Studies on blood group substances. V. Blood group substance A coupled to agarose as an immunosorbent. Biochim Biophys Acta 1974; 362:567-74. [PMID: 4415935 DOI: 10.1016/0304-4165(74)90152-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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Joner PE, Kristiansen T, Einarsson M. Purification and properties of L-asparaginase A from Acinetobacter calcoaceticus. Biochim Biophys Acta 1973; 327:146-56. [PMID: 4770738 DOI: 10.1016/0005-2744(73)90112-5] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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Affiliation(s)
- L Sundberg
- Group of Applied Biochemistry, The Swedish Board for Technical Development, Institute of Biochemistry, Box 531, S-751 21 1, Uppsala, Sweden
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Affiliation(s)
- T Kristiansen
- Institute of Biochemistry, University of Uppsala, Sweden
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Kristiansen T, Sundberg L, Porath J. Studies on blood group substances. II. Coupling of blood group substane A to hydroxyl-containing matrices, including aminoethyl cellulose and agarose. Biochim Biophys Acta 1969; 184:93-8. [PMID: 5791117] [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: 01/16/2023]
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Kristiansen T, Porath J. Studies on blood group substances. I. Purification of active material from hog gastric mucin by specific precipitation with Vicia cracca phytohemagglutinin. Biochim Biophys Acta 1968; 158:351-7. [PMID: 5660100] [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: 01/16/2023]
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