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Drake M, Austin G, Dann L, Li Y, Shuker C, Psirides A. Introduction of a standardised maternity early warning system: indicative data from a before-and-after study at a large pilot site before national rollout in Aotearoa New Zealand. Anaesthesia 2021; 76:1600-1606. [PMID: 34387367 DOI: 10.1111/anae.15557] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/23/2021] [Indexed: 12/01/2022]
Abstract
Strong evidence now demonstrates that recognition and response systems using standardised early warning scores can help prevent harm associated with in-hospital clinical deterioration in non-pregnant adult patients. However, a standardised maternity-specific early warning system has not yet been agreed in the UK. In Aotearoa New Zealand, following the nationwide implementation of the standardised New Zealand Early Warning Score (NZEWS) for adult inpatients, a modified maternity-specific variation (NZMEWS) was piloted in a major tertiary hospital in Auckland, before national rollout. Following implementation in July 2018, we observed a significant and sustained reduction in severe maternal morbidity as measured by emergency response calls to women who were very unwell (emergency response team call), and a non-significant reduction in cardiorespiratory arrest team calls. Emergency response team calls to maternity wards fell from a median of 0.8 per 100 births at baseline (January 2017-May 2018) to 0.6 per 100 births monthly (from March 2019 to December 2020) (p < 0.0001). Cardiorespiratory arrest team calls to maternity wards fell from 0.14 per 100 births per quarter (quarter 1 2017-quarter 2 2018) to 0.09 calls per 100 births per quarter after NZMEWS was introduced (quarter 3 2018-quarter 4 2020) (p = 0.2593). These early results provide evidence that NZMEWS can detect and prevent deterioration of pregnant women, although there are multiple factors that may have contributed to the reduction in emergency response calls noted.
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Affiliation(s)
- M Drake
- National Women's Health Department of Anaesthesia, Auckland City Hospital, Auckland, Aotearoa New Zealand
| | - G Austin
- Patient Safety and Capability, Health Quality and Safety Commission, Wellington, Aotearoa New Zealand
| | - L Dann
- Patient Safety and Capability, Health Quality and Safety Commission, Wellington, Aotearoa New Zealand
| | - Y Li
- Health Quality Intelligence, Health Quality and Safety Commission, Wellington, Aotearoa New Zealand
| | - C Shuker
- Health Quality Intelligence, Health Quality and Safety Commission, Wellington, Aotearoa New Zealand
| | - A Psirides
- Wellington Regional Hospital, Wellington, Aotearoa New Zealand
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Carvell JP, Austin G, Matthee A, Van de Spiegle K, Cunningham S, Harding C. Developments in Using Off-Line Radio Frequency Impedance Methods for Measuring the Viable Cell Concentration in the Brewery. Journal of the American Society of Brewing Chemists 2018. [DOI: 10.1094/asbcj-58-0057] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
| | - G. Austin
- Labatt Brewing Co., London, Ontario, N6A 4M3, Canada
| | - A. Matthee
- South African Breweries, Rosslyn, South Africa
| | | | | | - Claire Harding
- University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK
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3
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DeLay K, Austin GL, Menard-Katcher P. Anatomic abnormalities are common potential explanations of manometric esophagogastric junction outflow obstruction. Neurogastroenterol Motil 2016; 28:1166-71. [PMID: 26948429 DOI: 10.1111/nmo.12814] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/28/2015] [Accepted: 02/05/2016] [Indexed: 02/08/2023]
Abstract
BACKGROUND Esophagogastric junction outflow obstruction (EGJOO) is an esophageal motility diagnosis associated with a myriad of conditions. The frequency of EGJOO attributed to anatomic causes compared to idiopathic causes is uncertain. Our study aims to identify the frequency of EGJOO and to compare these two groups. METHODS We conducted a case-control study of high-resolution manometry (HRM) studies with a diagnosis of EGJOO performed at a single academic center. EGJOO cases were classified as anatomic (if any potential anatomic cause was identified) or idiopathic. Clinical and manometric characteristics of idiopathic EGJOO were compared with anatomic EGJOO cases. KEY RESULTS Criteria for EGJOO were met in 11% of HRM studies. Ancillary studies revealed 21/32 EGJOO cases had potential anatomic causes with a hiatal hernia noted in 15/21 cases of anatomic EGJOO. Idiopathic EGJOO cases met Chicago Classification criteria for hypercontractile esophagus with greater frequency than anatomic cases (p = 0.01). The mean distal contractile integral was significantly greater for idiopathic cases compared to anatomic cases (p = 0.003). Treatments used for EGJOO were varied and usually successful in alleviating symptoms. Patients with anatomic EGJOO related to a hiatal hernia who underwent an antireflux operation did not develop dysphagia postoperatively. CONCLUSIONS & INFERENCES EGJOO is a frequently encountered manometric diagnosis, commonly associated with anatomic abnormalities potentially explaining the EGJOO. These findings support current recommendations to pursue ancillary diagnostics to investigate cases of unexplained EGJOO. Cases of idiopathic EGJOO are more likely to have hypercontractility on HRM, possibly suggesting a primary esophageal motility disorder.
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Affiliation(s)
- K DeLay
- Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - G L Austin
- Division of Gastroenterology and Hepatology, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - P Menard-Katcher
- Division of Gastroenterology and Hepatology, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
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Abstract
To determine the degree of MCA vasospasm necessary to exceed the ischaemic threshold of blood flow reduction to less than 1/3 normal flow, we developed a computer model of blood flow in the middle cerebral artery distribution. When solved for a 3 mm trunk diameter, it showed a normal flow of 179 ml/min. It was necessary to decrease trunk diameter by 75%, or branch diameter by 50%, or increase peripheral resistance by a factor of 3, in order to decrease blood flow to less than 1/3 normal.
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Affiliation(s)
- G Austin
- Aneurysm Research Institute, Santa Barbara, California 93105
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Peterson DI, Austin GM, Austin G. Book Review. Neurol Res 2016. [DOI: 10.1080/01616412.1982.11739620] [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: 10/21/2022]
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Dillon SM, Lee EJ, Kotter CV, Austin GL, Gianella S, Siewe B, Smith DM, Landay AL, McManus MC, Robertson CE, Frank DN, McCarter MD, Wilson CC. Gut dendritic cell activation links an altered colonic microbiome to mucosal and systemic T-cell activation in untreated HIV-1 infection. Mucosal Immunol 2016; 9:24-37. [PMID: 25921339 PMCID: PMC4626441 DOI: 10.1038/mi.2015.33] [Citation(s) in RCA: 148] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2014] [Accepted: 03/03/2015] [Indexed: 02/04/2023]
Abstract
HIV-1-associated disruption of intestinal homeostasis is a major factor contributing to chronic immune activation and inflammation. Dendritic cells (DCs) are crucial in maintaining intestinal homeostasis, but the impact of HIV-1 infection on intestinal DC number and function has not been extensively studied. We compared the frequency and activation/maturation status of colonic myeloid DC (mDC) subsets (CD1c(+) and CD1c(neg)) and plasmacytoid DCs in untreated HIV-1-infected subjects with uninfected controls. Colonic mDCs in HIV-1-infected subjects had increased CD40 but decreased CD83 expression, and CD40 expression on CD1c(+) mDCs positively correlated with mucosal HIV-1 viral load, with mucosal and systemic cytokine production, and with frequencies of activated colon and blood T cells. Percentage of CD83(+)CD1c(+) mDCs negatively correlated with frequencies of interferon-γ-producing colon CD4(+) and CD8(+) T cells. CD40 expression on CD1c(+) mDCs positively associated with abundance of high prevalence mucosal Prevotella copri and Prevotella stercorea but negatively associated with a number of low prevalence mucosal species, including Rumminococcus bromii. CD1c(+) mDC cytokine production was greater in response to in vitro stimulation with Prevotella species relative to R. bromii. These findings suggest that, during HIV infection, colonic mDCs become activated upon exposure to mucosal pathobiont bacteria leading to mucosal and systemic immune activation.
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Affiliation(s)
- S M Dillon
- Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - E J Lee
- Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - C V Kotter
- Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - G L Austin
- Department of Gastroenterology, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - S Gianella
- Division of Infectious Diseases, University of California San Diego, La Jolla, California, USA
| | - B Siewe
- Department of Immunology-Microbiology, Rush University Medical Center, Chicago, Illinois, USA
| | - D M Smith
- Division of Infectious Diseases, University of California San Diego, La Jolla, California, USA
| | - A L Landay
- Department of Immunology-Microbiology, Rush University Medical Center, Chicago, Illinois, USA
| | - M C McManus
- Department of Pathology, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - C E Robertson
- Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
- University of Colorado Microbiome Research Consortium, Aurora, Colorado, USA
| | - D N Frank
- Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
- University of Colorado Microbiome Research Consortium, Aurora, Colorado, USA
| | - M D McCarter
- Department of Surgery, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - C C Wilson
- Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
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Peterson CA, Borucki DT, Austin G. Pre-assayed AHF concentrate therapy for hemophilia. Bibl Haematol 2015; 29:1160-5. [PMID: 5303858 DOI: 10.1159/000384756] [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] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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Austin G, Hayward W. Design and use of a plastic ball and socket stereotactic instrument for surgery of the brain. Bibl Psychiatr 2015; 143:15-21. [PMID: 4904205 DOI: 10.1159/000385813] [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] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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Austin G, Bell T, Duncan M. Active By Community Design (ABCD): Evidence in action. J Sci Med Sport 2014. [DOI: 10.1016/j.jsams.2014.11.357] [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: 11/27/2022]
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10
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Davies A, Giannoudis A, Zhang JE, Austin G, Wang L, Holyoake TL, Müller MC, Foroni L, Kottaridis PD, Pirmohamed M, Clark RE. Dual glutathione-S-transferase-θ1 and -μ1 gene deletions determine imatinib failure in chronic myeloid leukemia. Clin Pharmacol Ther 2014; 96:694-703. [PMID: 25188725 DOI: 10.1038/clpt.2014.176] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2014] [Accepted: 08/13/2014] [Indexed: 01/16/2023]
Abstract
Approximately 40% of patients with chronic myeloid leukemia (CML) receiving imatinib fail treatment. There is an increased risk of CML in subjects with (i) deletions of genes encoding glutathione-S-transferase (GST)-θ1 (GSTT1) and -μ1, (GSTM1) and (ii) the GST-π1 (GSTP1) single-nucleotide polymorphism (SNP) Ile105Val (GSTP1*B; rs1695); however, their effects on imatinib treatment outcome are not known. Here, we assess the role of these GSTs in relation to imatinib treatment outcome in 193 CML patients. Deletion of GSTT1 alone, or in combination with deletion of the GSTM1 gene, significantly increased the likelihood of imatinib failure (P = 0.021 and P < 0.001, respectively). The GSTP1*B SNP was not associated with time to imatinib failure. Losses of the GSTT1 and GSTM1 genes are therefore important determinants of imatinib failure in CML. Screening for GSTT1 and GSTM1 gene deletions during diagnosis may identify patients who may be better treated using an alternative therapy.
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Affiliation(s)
- A Davies
- Molecular and Clinical Cancer Medicine, University of Liverpool, Liverpool, UK
| | - A Giannoudis
- Molecular and Clinical Cancer Medicine, University of Liverpool, Liverpool, UK
| | - J E Zhang
- The Wolfson Centre for Personalised Medicine, Molecular and Clinical Pharmacology, University of Liverpool, Liverpool, UK
| | - G Austin
- Molecular and Clinical Cancer Medicine, University of Liverpool, Liverpool, UK
| | - L Wang
- Molecular and Clinical Cancer Medicine, University of Liverpool, Liverpool, UK
| | - T L Holyoake
- Institute of Cancer Sciences, University of Glasgow, Glasgow, UK
| | - M C Müller
- Faculty of Medicine, University of Heidelberg, Mannheim, Germany
| | - L Foroni
- Department of Haematology, Imperial College London, Hammersmith Hospital, London, UK
| | | | - M Pirmohamed
- The Wolfson Centre for Personalised Medicine, Molecular and Clinical Pharmacology, University of Liverpool, Liverpool, UK
| | - R E Clark
- Molecular and Clinical Cancer Medicine, University of Liverpool, Liverpool, UK
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Dillon SM, Lee EJ, Kotter CV, Austin GL, Dong Z, Hecht DK, Gianella S, Siewe B, Smith DM, Landay AL, Robertson CE, Frank DN, Wilson CC. An altered intestinal mucosal microbiome in HIV-1 infection is associated with mucosal and systemic immune activation and endotoxemia. Mucosal Immunol 2014; 7:983-94. [PMID: 24399150 PMCID: PMC4062575 DOI: 10.1038/mi.2013.116] [Citation(s) in RCA: 344] [Impact Index Per Article: 34.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2013] [Revised: 11/25/2013] [Accepted: 11/27/2013] [Indexed: 02/08/2023]
Abstract
Human immunodeficiency virus-1 (HIV-1) infection disrupts the intestinal immune system, leading to microbial translocation and systemic immune activation. We investigated the impact of HIV-1 infection on the intestinal microbiome and its association with mucosal T-cell and dendritic cell (DC) frequency and activation, as well as with levels of systemic T-cell activation, inflammation, and microbial translocation. Bacterial 16S ribosomal DNA sequencing was performed on colon biopsies and fecal samples from subjects with chronic, untreated HIV-1 infection and uninfected control subjects. Colon biopsies of HIV-1-infected subjects had increased abundances of Proteobacteria and decreased abundances of Firmicutes compared with uninfected donors. Furthermore at the genus level, a significant increase in Prevotella and decrease in Bacteroides was observed in HIV-1-infected subjects, indicating a disruption in the Bacteroidetes bacterial community structure. This HIV-1-associated increase in Prevotella abundance was associated with increased numbers of activated colonic T cells and myeloid DCs. Principal coordinates analysis demonstrated an HIV-1-related change in the microbiome that was associated with increased mucosal cellular immune activation, microbial translocation, and blood T-cell activation. These observations suggest that an important relationship exists between altered mucosal bacterial communities and intestinal inflammation during chronic HIV-1 infection.
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Affiliation(s)
- SM Dillon
- University of Colorado Anschutz Medical Campus, Aurora Colorado
| | - EJ Lee
- University of Colorado Anschutz Medical Campus, Aurora Colorado
| | - CV Kotter
- University of Colorado Anschutz Medical Campus, Aurora Colorado
| | - GL Austin
- University of Colorado Anschutz Medical Campus, Aurora Colorado
| | - Z Dong
- University of Colorado Anschutz Medical Campus, Aurora Colorado
| | - DK Hecht
- University of Colorado Anschutz Medical Campus, Aurora Colorado
| | - S Gianella
- University of California, San Diego, La Jolla, California
| | - B Siewe
- Rush University Medical Center, Chicago
| | - DM Smith
- University of California, San Diego, La Jolla, California
| | - AL Landay
- Rush University Medical Center, Chicago
| | | | - DN Frank
- University of Colorado Anschutz Medical Campus, Aurora Colorado,University of Colorado Microbiome Research Consortium
| | - CC Wilson
- University of Colorado Anschutz Medical Campus, Aurora Colorado
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Chakravorty I, Fasakin C, Paine T, Narasimhaiah D, Austin G. Outpatient-Based Pulmonary Rehabilitation for COPD: A Cost of Illness Study. ACTA ACUST UNITED AC 2011. [DOI: 10.5402/2011/364989] [Citation(s) in RCA: 5] [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] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Pulmonary rehabilitation (PR) as recommended by COPD guidelines is a multimodality educational, self-management, supervised exercise program, resulting in improved symptom control, quality of life, and reduction of exacerbations, but there is a need to establish the affordability of PR for healthcare providers.
We designed a cost-of-illness study of PR in advanced COPD, with an 8-week hospital-based program, measuring direct healthcare costs for 12 months before and after PR. In 31 patients (female = 16), aged 68 (±8) years, and FEV1% predicted to be 40 (±16.6), there was a reduction in inpatient hospital stay by net 2.35 days (78%; ) and routine primary care visits. Costs were reduced by £1835 per person (base year 2008), with a saving of £791 to 1313 GBP per person, per year. Therefore, PR provision in COPD is likely to be affordable due to reduced direct healthcare costs, even without considering the individual and societal benefits.
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Affiliation(s)
- I. Chakravorty
- Department of Respiratory Medicine, East and North Herts NHS Trust, Stevenage SG1 4AB, UK
- School of Postgraduate Medicine, University of Hertfordshire, Hertfordshire AL10 9AB, UK
| | - C. Fasakin
- Department of Physiotherapy, East and North Herts PCT, Hertfordshire AL8 6JL, UK
| | - T. Paine
- Department of Physiotherapy, East and North Herts PCT, Hertfordshire AL8 6JL, UK
| | - D. Narasimhaiah
- Department of Respiratory Medicine, East and North Herts NHS Trust, Stevenage SG1 4AB, UK
| | - G. Austin
- School of Postgraduate Medicine, University of Hertfordshire, Hertfordshire AL10 9AB, UK
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Wither A, Rehfisch M, Austin G. The impact of bird populations on the microbiological quality of bathing waters. Water Sci Technol 2005; 51:199-207. [PMID: 15850191] [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: 05/24/2023]
Abstract
To ensure optimum quality at Bathing Waters, the control of diffuse sources of bacterial contamination is receiving increasing attention. As part of an initiative to improve the quality of the EU designated bathing waters on the Fylde Coast (North West England), a project was undertaken to quantify the faecal indicator load from birds and assess the significance on water quality. High bird counts are encountered on the Fylde Coast with gulls, feral pigeons and starlings being prominent. The piers at Blackpool make an attractive roost for starlings with numbers peaking at over 30,000 in late summer. Systematic recording of bird numbers and locations was undertaken during 2001/2. Estimates were also made of the daily faecal organism production by the different species. The spatial distribution of faecal organisms from the bird population was statistically linked to synoptic water quality data. This allowed estimates to be made of the contribution from birds to the faecal pollution load at the bathing waters. The work confirmed a statistically significant link between bird populations and water quality with a marked seasonal bias.
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Affiliation(s)
- A Wither
- Environment Agency, P.O. Box 12, Warrington WA4 1HG, UK
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Langleben DD, Austin G, Krikorian G, Ridlehuber HW, Goris ML, Strauss HW. Interhemispheric asymmetry of regional cerebral blood flow in prepubescent boys with attention deficit hyperactivity disorder. Nucl Med Commun 2001; 22:1333-40. [PMID: 11711904 DOI: 10.1097/00006231-200112000-00009] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
The prefrontal cortex is asymmetric in both structure and function. In normal subjects, the right prefrontal cortex is activated more than the left during response inhibition. Patients with attention deficit hyperactivity disorder (ADHD) have impaired response inhibition and altered structural interhemispheric asymmetry. This study was conducted to examine the functional interhemispheric asymmetry during response inhibition in children with ADHD. Subjects were divided into three groups according to the level of motor hyperactivity. Blood flow tracer (99m)Tc-ethyl cysteinate dimer was injected while subjects were performing a response inhibition task (RIT), followed by single photon emission computerized tomography (SPECT). After three-dimensional reconstruction, filtering and smoothing, individual scans were morphed to a template. Three average group images were created from individual scans. Each average group image was subtracted voxel-by-voxel from its mirror image to compare the regional cerebral blood flow (rCBF) in the right and left cerebral hemispheres, yielding images of significant interhemispheric rCBF asymmetry. The severe hyperactivity group exhibited most prefrontal left>right rCBF asymmetry and left>right occipitoparietal asymmetry. Reversal of functional prefrontal asymmetry in boys with severe motor hyperactivity supports the hypothesis of right prefrontal cortex dysfunction in ADHD.
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Affiliation(s)
- D D Langleben
- The Department of Psychiatry, Treatment Research Center, University of Pennsylvania, 3900 Chestnut Street, Philadelphia, PA 19104, USA.
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Jackson LA, Austin G, Chen RT, Stout R, DeStefano F, Gorse GJ, Newman FK, Yu O, Weniger BG. Safety and immunogenicity of varying dosages of trivalent inactivated influenza vaccine administered by needle-free jet injectors. Vaccine 2001; 19:4703-9. [PMID: 11535320 DOI: 10.1016/s0264-410x(01)00225-0] [Citation(s) in RCA: 98] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
To evaluate the perceived pain, other adverse events, and immunogenicity of influenza virus vaccine administered by needle-free jet injector (JI) compared with that of vaccine administered by needle and syringe (N&S), we randomly assigned 304 healthy young adults to receive one of three dosages (0.5, 0.3, or 0.2 ml) of the 1998-1999 season vaccine administered by either of two JI devices or by N&S. In multivariate analysis, female gender and JI administration were associated with higher levels of pain reported at the time of vaccination as well as with the occurrence of local injection site reactions following vaccination. Immune response did not vary significantly by dosage but administration by one JI device was associated with higher post-vaccination H1N1 antibody titers.
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Affiliation(s)
- L A Jackson
- Center for Health Studies, Group Health Cooperative, Seattle, WA, USA.
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Davis KL, Mohs RC, Marin DB, Purohit DP, Perl DP, Lantz M, Austin G, Haroutunian V. Neuropeptide abnormalities in patients with early Alzheimer disease. Arch Gen Psychiatry 1999; 56:981-7. [PMID: 10565496 DOI: 10.1001/archpsyc.56.11.981] [Citation(s) in RCA: 58] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
BACKGROUND Deficits in somatostatin-like immunoreactivity (SLI) and corticotropin-releasing factor immunoreactivity (CRF-IR) are well recognized as prominent neurochemical deficits in Alzheimer disease (AD). The question of whether these profound neuropeptidergic deficits found in patients with end-stage disease extend into those with much earlier disease is relatively unanswered. To determine the relation between level of SLI and CRF-IR in different cerebrocortical regions to the earliest signs of cognitive deterioration in AD. METHODS We examined SLI and CRF-IR levels in 9 neocortical brain regions of 66 elderly patients in a postmortem study of nursing home residents who had either no significant neuropathologic lesions or lesions associated only with AD. Patients were assessed by the Clinical Dementia Rating scale (CDR) to have no dementia or questionable, mild, or moderate dementia, and were compared with 15 patients with severe dementia. RESULTS Both CRF-IR and SLI were significantly reduced in the cortices of patients with the most severe dementia, but only the levels of CRF-IR were reduced in those with mild (CDR = 1.0) and moderate dementia (CDR = 2.0). Levels of CRF-IR and SLI correlated significantly with CDR, but this correlation was more robust for CRF-IR and persisted even when severely cognitively impaired patients were eliminated from analysis. CONCLUSIONS Although SLI and CRF-IR levels are significantly reduced in patients with severe dementia, only CRF-IR is reduced significantly in the cortices of those with mild dementia. Thus, CRF-IR can serve as a potential neurochemical marker of early dementia and possibly early AD.
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Affiliation(s)
- K L Davis
- Department of Psychiatry, Mount Sinai School of Medicine, and Jewish Home and Hospital, New York, NY 10029, USA.
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Abstract
To compare stability of wrist external fixation, simulated unstable extra-articular distal radius fractures were created in 7 fresh-frozen cadaveric upper extremities and stabilized using 4 different external fixators. Physiologic muscle tension across the wrist was simulated by application of 40-N load distributed among the wrist tendons. Alternating loads of up to 100 N in flexion and extension of the wrist were applied during stability testing and 3-dimensional kinematics of the proximal and distal fracture fragments were determined using attached infrared light-emitting diodes and a 3-dimensional motion tracking system. Fracture stability was reassessed for each of the constructs after augmentation of the fracture fragments with a single dorsal transfixion K-wire. K-wire augmentation demonstrated a significant reduction in motion of the distal radial fragment of at least 40% in all 3 rotational planes. For flexion/extension, the reduction in motion was from 4.5 degrees to 2.6 degrees. For radial/ulnar deviation, the range of motion decreased from 3.0 degrees to 1.5 degrees. Rotational motion declined from an average of 3.2 degrees to 1.2 degrees. The addition of the single dorsal transfixion K-wire significantly improved stability of each of the 4 fixators in at least 1 of the 3 planes in which motion was measured. While we compared the most rigid with some of the least rigid external fixators, the data do not support an important difference in fracture fragment stability among the 4 fixators. The data much more strongly support the concept of K-wire augmentation for increasing stability of an unstable extra-articular distal radius fracture regardless of the type of external fixator that is used.
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Affiliation(s)
- S W Wolfe
- Yale Hand and Upper Extremity Center, Department of Orthopaedics and Rehabilitation, Yale University School of Medicine, New Haven, CT 06520-8071, USA
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Abstract
The impact of plasmapheresis on the disposition of disopyramide was investigated in a 16-year-old female with systemic lupus erythematosus. Determination of total disopyramide plasma concentrations immediately prior to and following a 4-h plasmapheresis treatment revealed a significant reduction (i.e., 1.77 to 0.7 mg/l or approximately 60%). However, reassessment of the total serum concentration after 1.5 h (i.e., post equilibrium) revealed a rebounding of the value to 1.64 mg/l. Associated with this reduction in total serum levels was a decrease in the protein-bound fraction of disopyramide from 69.5% (pre treatment) to 48.6% (post treatment) that corresponded to a commensurate reduction in the concentration of alpha1-acid glycoprotein (i.e., 119 mg/dl pre treatment to 48.9 mg/dl post treatment). Despite these alterations in disopyramide concentrations, the procedure removed only 2.7% of the disopyramide dose and was not associated with the appearance of a cardiac dysrhythmia.
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Affiliation(s)
- S G Martin
- Department of Pediatrics, University of Missouri-Kansas City, Children's Mercy Hospital, 64108, USA
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Abstract
CONTEXT A central tenet of Alzheimer disease (AD) is the loss of cortical cholinergic function and cholinergic markers in postmortem brain specimens. Whether these profound deficits in cholinergic markers found in end-stage patients are also found in patients with much earlier disease is not known. OBJECTIVE To determine whether cholinergic deficits in AD precede, follow, or occur in synchrony with the earliest signs of cognitive deterioration. DESIGN, SETTING, AND PATIENTS Postmortem study of nursing home residents with Clinical Dementia Rating (CDR) Scale scores of 0.0 to 2.0 and 4.0 to 5.0 who underwent autopsy between 1986 and 1997, comparing the activity of the cholinergic marker enzymes in the cortices of 66 elderly subjects with no (CDR score = 0.0; n = 18), questionable (CDR score = 0.5; n = 11), mild (CDR score = 1.0; n = 22), or moderate (CDR score = 2.0; n = 15) dementia vs subjects with severe dementia (CDR score = 4.0-5.0; n = 15). MAIN OUTCOME MEASURES Activity of the cholinergic marker enzymes choline acetyltransferase and acetylcholinesterase in 9 neocortical brain regions. RESULTS The activity of choline acetyltransferase and acetylcholinesterase in 9 neocortical brain regions did not differ significantly in subjects with CDR scores of 0.0 to 2.0, but was significantly lower in subjects with severe dementia (CDR score = 4.0-5.0). Choline acetyltransferase levels were significantly correlated with severity of neuropathological lesions of AD, as measured by density of neuritic plaques and neurofibrillary tangles. CONCLUSIONS Although neocortical cholinergic deficits are characteristic of severely demented AD patients, in this study, cholinergic deficits were not apparent in individuals with mild AD and were not present until relatively late in the course of the disease. These results suggest that patients with more severe disease should be a target for cholinergic treatment.
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Affiliation(s)
- K L Davis
- Department of Psychiatry, Mount Sinai School of Medicine, New York, NY 10029-6574, USA
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Austin G. Eating into resources. Nurs Times 1999; 95:64-7. [PMID: 10349020] [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: 02/12/2023]
Affiliation(s)
- G Austin
- Mount Farm Surgery, Bury St Edmunds, Suffolk
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Abstract
External fixation of fractures of the distal end of the radius neutralizes external forces and maintains axial alignment during healing. As far as we know, there have been no biomechanical studies of the effects of early removal of the fixator in a partially healed fracture model. The purpose of the present study was to observe the load-displacement behavior of a distal radial fracture model in which we had simulated partial healing by injection of butyl-rubber caulk and augmented this simulated healing with Kirschner-wire fixation. Sixteen fresh-frozen hand-wrist-forearm specimens from cadavera were mounted in mid-rotation in resin pots, and a load was applied. An osteotomy was used to simulate the fracture. Relative motion at the site of the osteotomy was compared, with use of a three-dimensional Optotrak kinematic device, during physiological loading of six constructs with Kirschner-wire transfixion or outrigger fixation. In the experimental group, partial healing was simulated by injection of butyl-rubber caulk into the site of the osteotomy and testing with simulated muscle-loading was performed through a full range of motion of the wrist. No difference could be detected between the relative motion at the osteotomy sites that had been treated with standard fully augmented external fixation and that in the experimental group (p > 0.05). T test analysis revealed that motion was equivalent regardless of whether Kirschner-wire transfixion or outrigger fixation had been used (p = 0.62) and that all of the augmented constructs had significantly less relative motion than all of the nonaugmented constructs (p < 0.001).
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Affiliation(s)
- S W Wolfe
- Department of Orthopaedics and Rehabilitation, Yale University School of Medicine, New Haven, Connecticut 06520-8071, USA.
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Vaidya CJ, Austin G, Kirkorian G, Ridlehuber HW, Desmond JE, Glover GH, Gabrieli JD. Selective effects of methylphenidate in attention deficit hyperactivity disorder: a functional magnetic resonance study. Proc Natl Acad Sci U S A 1998; 95:14494-9. [PMID: 9826728 PMCID: PMC24401 DOI: 10.1073/pnas.95.24.14494] [Citation(s) in RCA: 604] [Impact Index Per Article: 23.2] [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: 06/05/1998] [Accepted: 09/30/1998] [Indexed: 11/18/2022] Open
Abstract
Functional MRI revealed differences between children with Attention Deficit Hyperactivity Disorder (ADHD) and healthy controls in their frontal-striatal function and its modulation by methylphenidate during response inhibition. Children performed two go/no-go tasks with and without drug. ADHD children had impaired inhibitory control on both tasks. Off-drug frontal-striatal activation during response inhibition differed between ADHD and healthy children: ADHD children had greater frontal activation on one task and reduced striatal activation on the other task. Drug effects differed between ADHD and healthy children: The drug improved response inhibition in both groups on one task and only in ADHD children on the other task. The drug modulated brain activation during response inhibition on only one task: It increased frontal activation to an equal extent in both groups. In contrast, it increased striatal activation in ADHD children but reduced it in healthy children. These results suggest that ADHD is characterized by atypical frontal-striatal function and that methylphenidate affects striatal activation differently in ADHD than in healthy children.
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Affiliation(s)
- C J Vaidya
- Department of Psychology, Stanford University, Stanford, CA 94305,
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26
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Abstract
Splints attached to the right forearm were used to rotate the forearm's physical reference frame, as defined by the eigenvectors of its inertia tensor, relative to its spatial reference frame. In two experiments, when subjects were required to orient the forearm parallel to, or at 45 degrees to, the environmental horizontal, they produced limb orientations that were systematically deflected from the forearm's longitudinal spatial axis in the direction of the forearm's physical axes. The position sense seems to be based on inertial eigenvectors rather than on joint angles or gravitational torques.
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Affiliation(s)
- S R Garrett
- Center for the Ecological Study of Perception and Action, University of Connecticut, Storrs 06268, USA.
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Garg UC, Austin G, Barnes C, Hamilton M. Comparison of the Abbott IMx Tacrolimus I and Tacrolimus II assays. Clin Chem 1998; 44:1783-5. [PMID: 9702984] [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: 02/08/2023]
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28
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Austin G. A pediatrician's view: anyone for a game of bridge? Pediatr Ann 1995; 24:503, 518, 530. [PMID: 8545157 DOI: 10.3928/0090-4481-19951001-03] [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: 11/20/2022]
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29
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Austin G, Fisher S, Dickson D, Anderson D, Richardson S. The significance of the extracellular matrix in intracranial aneurysms. Ann Clin Lab Sci 1993; 23:97-105. [PMID: 7681275] [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
To what extent might change sin the extracellular matrix proteins in intracranial aneurysms (IA) or parent artery (PA) wall contribute to enlargement? Using IA specimens obtained from the coroner's office, the wall structure by light (Trichrome and Actin stains) and immunofluorescent microscopy (IF) (collagen I and fibronectin) have been studied in 18 specimens. It is well known that IA only arise when there is a deficiency in the internal elastic membrane and some breakdown in the media. The results show a normal three layer structure of intima, media, (muscularis), and adventitia in the PA extending out into the neck of the aneurysm. Immunofluorescent stains (IS) show collagen I and fibronectin limited to the adventitia and muscularis, respectively, of the PA and control arteries. The enlarging IA wall shows almost complete loss of this architecture. By IF stain, collagen I and fibronectin are intermingled throughout the IA wall. It is postulated that loss of structure and the confining muscularis layer permit easier elastic enlargement from a more or less homogeneous wall structure.
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Affiliation(s)
- G Austin
- Aneurysm Research Laboratory, University of California, Santa Barbara
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Austin GL, Massimino JD. Ambulatory care design: emerging trends. J Healthc Des 1992; 5:39-45. [PMID: 10128979] [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: 02/11/2023]
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31
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Austin G. Lead contaminated cattle feed. Vet Rec 1990; 127:316. [PMID: 2238418] [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: 12/30/2022]
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Abstract
The Victorian Aboriginal Mental Health Network (VAMHN) is a unique mental health programme for Aboriginal people in Australia. The network was set up in 1987. The services and programmes developed include a community consultation service, a psychiatric inpatient unit; and educational, evaluative and research programmes. Utilisation of the network has steadily increased and the demand for both primary and secondary consultations continues to grow.
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Abstract
Three cases of self-inflicted gingival injuries resulting from the improper use of the Keyes technique are presented. The profession must assume responsibility for studies to determine the safety of the methods of application of the hydrogen peroxide, salt and baking soda mixtures and disseminate this information for the public interest.
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Abstract
The purpose of this study is to compare the background regional cerebral blood flow (rCBF) in TIA patients with and without angiographically demonstrable lesions. 147 TIA patients with severe stenosis or occlusion of major vessels supplying the brain (A group) were compared with a similar group without any arterial lesion demonstrable by angiography (B group). Their rCBFs were measured by the intravenous Xe133 technique. The average of mean rCBF (MrCBF) in (A) group (119 cases) with a mean age of 59.9 yrs was 50.1 +/- 12.3 ml/100g/m and the average of MrCBF in (B) group (31 cases) with a mean age of 59.3 years was 47.6 +/- 11.8 ml/100g/m. In spite of no angiographic lesion in (B) group, the MrCBF was lower in value than that in (A) group. The average of hemispheric rCBF (HrCBF) was approximately the same bilaterally in a control group (55.4 ml/100g/m), and even in (B) group there was no significant difference between the symptomatic side and the non-symptomatic side. In (A) group, HrCBF on the symptomatic side (48.1 ml/100g/m) was significantly lower on the average than that on the opposite side (51.5 ml/100g/m). Comparing probe by probe in TIA patients, the average rCBF of the symptomatic site was 44.1 +/- 11.9 ml/100g/m and that of the symmetrically opposite site was 47.6 +/- 13.0 ml/100g/m in (A) group. In (B) group, the average rCBF of the symptomatic site was 46.2 +/- 10.8 ml/100g/m, and 47.7 +/- 10.8 ml/100g/m for the non-symptomatic site. These values in both group (A) and (B), have a significant difference between symptomatic probes and non-symptomatic probes (p less than 8.0 X 10(-7) and p less than 6.5 X 10(-3)).
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Abstract
The purpose of this study is to investigate the relationship between changes in cortical Po2 (bPo2) and cortical blood flow when inhalating different oxygen mixtures. Experiments were performed on 31 cats anaesthetized with N2O/O2 plus supplemental drugs for immobilization and analgesia. Cortical Po2 was measured by the polarographic method using 25 microns Pt electrode (coated) and a 250 micron Ag-AgCl2 indifferent electrode, especially designed to rest lightly on the cortex by means of coiled spring support. Using the same electrode but with opposite tip polarization; local cortical blood flow (lCoBF) was measured at the same site by the H2-clearance method. The change of bPo2 in going from FiO2 25% to FiO2 75% was measured at 58 different sites. (Table 2). At 25% FiO2 the mean bPo2 was 24 +/- 16 mm Hg, with a range from 4 to 92 mm Hg. With increased FiO2 to 75% local bPo2 responded quite differently at adjacent sites. At 75% FiO2 the mean bPo2 was 42.7 +/- 32 mm Hg with a range from 10 mm Hg to 198 mm Hg. The bPo2 and lCoBF were both measured at 44 of the 58 different sites. Cortical sites with a resting bPo2 greater than 30 mm Hg at 25% FiO2 had a lCBF = 57 +/- 12 ml/100g m; whereas sites with resting normoxic bPO2 less than 20 mm Hg had a mean ICoBF = 56 +/- 14 ml/100g min.(ABSTRACT TRUNCATED AT 250 WORDS)
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Abstract
A system called the ultrasound macroscope has been developed to measure the ultrasonic properties of tissues. Based on the concept of the scanning acoustic microscope, it is capable of generating quantitative images of ultrasound velocity, attenuation and backscatter for macroscopic slices of tissue. By maintaining high resolution (approximately 120 microns at 13 MHz) the morphology of complex tissues is well delineated. Data from regions of interest in the tissue are transformed into three dimensional probability distributions representative of the tissue's ultrasonic characteristics. Sets of two dimensional projections of these distributions are used to display the information. As an initial study, the properties of breast tissues are analyzed. Examples of both normal and abnormal pathology are presented and the relevance of the results to clinical imaging are discussed.
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Abstract
The purpose of this investigation was to compare the effects of hypoxia, asphyxia, and ischemia on brain cortical oxidative metabolism. This study was carried out using 14 New Zealand White rabbits. The effects of episodic stress were measured simultaneously on brain functional metabolism by monitoring cortical oxygen tension (brain pO2), cortical cerebral blood flow (cCBF), cortical blood volume, and mitochondrial oxidative metabolism. During hypoxia (when the fraction of inspired O2 (FiO2) was reduced to 10%) and asphyxia (induced by turning the respirator off), there was a decrease of brain pO2 but an increase of cCBF and blood volume. Similarly, there was a reduction of cortical oxidative metabolism. In post-asphyxic conditions, an overshoot of brain pO2 and post-asphyxic oxidation of cytochrome (Cyt.) aa3 were usually shown. Under ischemic conditions (induced by sudden severe hypotension plus bilateral common carotid occlusion), cCBF and blood volume were decreased. There was also a decrease of brain pO2 and a reduction of Cyt. aa3 following ischemia. These techniques are applicable in intraoperative monitoring of patients.
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Austin G. Child health care and the Golden Arches. Hosp Pract (Off Ed) 1983; 18:15-6. [PMID: 6401265 DOI: 10.1080/21548331.1983.11702445] [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] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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40
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Abstract
We have investigated the changes in regional cerebral blood flow (rCBF) in patients with occlusive vertebrobasilar disease. Fifty patients who showed severe stenosis or occlusion of the vertebrobasilar artery territory were studied by angiography. Lesions in 13 of these patients were limited to the vertebrobasilar artery (limited VB group), and 37 patients showed combined vertebrobasilar/carotid artery lesions (combined VB-C group). Measurements of rCBF in the group of 50 patients using the intravenous xenon 133 technique showed that there was a significant decrease in the mean rCBF (47.5 +/- 1.4 ml/100 gm/min) as compared with 19 age-matched normal subjects (54.9 +/- 1.8 ml/100 gm/min. There was also a significant difference in mean rCBF between the combined VB-C group (45.6 +/- 1.5 ml/100 gm/min) and a group of 153 patients with limited carotid artery lesions (C group, 49.8 +/- 1.0 ml/100 gm/min). However, no significant difference in mean rCBF was found between the limited VB group and normal subjects. There were no differences in rCBF when evaluated according to the presence or absence of angiographic collateral circulation via the posterior communicating artery (Pcom). Good correlation was found between mean rCBF and direction of collateral flow via the Pcom (p less than 0.05). The value of hemispheric rCBF of patients with carotid system transient ischemic attacks (TIAs) was significantly lower than that of patients with vertebrobasilar system TIAs (p less than 0.02). In cerebral autoregulation tests of 24 patients with occlusive vertebrobasilar disease (7 patients from the limited VB group and 17 patients from the combined VB-C group), 13 of these 24 patients (54%) showed an impairment of autoregulation.
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Austin G. A new age for pediatrics: change, challenge, and cost. Pediatrics 1982; 70:643-5. [PMID: 7122165] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
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Yonekura M, Austin G, Hayward W. Long-term evaluation of cerebral blood flow, transient ischemic attacks, and stroke after STA-MCA anastomosis. Surg Neurol 1982; 18:123-30. [PMID: 7135191 DOI: 10.1016/0090-3019(82)90371-8] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.6] [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
A group of 107 consecutive patients with patent extracranial-intracranial bypasses were followed an average of 25.2 months to determine the long-term results on regional cerebral blood flow (rCBF), transient ischemic attacks (TIAs), and stroke incidence. Average mean rCBF initially rose to 110% at 1 week, then gradually fell to 105% at 6 months, and 85% at 2 years. Maximum increase in cerebral blood flow occurred in patients with middle cerebral artery stenosis or those in the preoperative low flow group, i.e., less than 50 ml/100 gm/min. In the group with TIAs plus mild stroke, the mean rCBF rose to 122% at 1 week, compared to the group with TIAs only who showed a mean increase to 107% at one week. Clinical improvement was excellent or good in 82% of those with TIAs only; in those with TIAs plus mild stroke, 77% had excellent or good relief of TIAs; and in those with mild stroke only, 70% recovered from their neurological deficits. In the 25.2 months of average follow-up, stroke occurred in only 1 patient on the side of the anastomosis, and in 2 patients on the side opposite the anastomosis, giving an average stroke incidence of 1.5% per year.
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Sugerman HJ, Austin GL, Qureshi GD, Hylemon P, Ruddy S, Greenfield LJ. Thrombocytopenia in progressive lethal canine peritonitis. Surg Gynecol Obstet 1982; 154:193-6. [PMID: 7058476] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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Sugerman HJ, Austin G, Newsome HH, Hylemon P, Greenfield LJ. Hemodynamics, oxygen consumption and serum catecholamine changes in progressive, lethal peritonitis in the dog. Surg Gynecol Obstet 1982; 154:8-12. [PMID: 7053593] [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] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
A progressive, lethal canine peritonitis model was developed using the intraperitoneal injection of previously processed, frozen human stool. Of 15 dogs with fecal contamination, seven died within 24 hours and eight died over two to nine days, with a mean of five days. The model was associated with an initial hyperdynamic state which became quite variable as sepsis progressed. The cardiac index in the septic dogs correlated directly with the arteriovenous oxygen content difference. Evidence of multiple system organ failure and a significant increase in norepinephrine levels was noted in the septic dogs. The serum catecholamine levels were inversely correlated with the systemic blood pressure but did not correlate with the systemic vascular resistance or the cardiac index. This implies a lack of responsiveness of resistance vessels or the heart to catecholamines in this severely septic dog model.
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Mesa ML, Clark M, Austin G, Barden M. Ethnic and cultural determinants of the perceptions of female dental students. J Dent Educ 1981; 45:576-80. [PMID: 6943175] [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: 01/22/2023]
Abstract
A survey of women dental students enrolled in all American and Canadian dental schools during the 1977-78 academic year was conducted to determine their backgrounds, current status, motivation regarding dentistry as a career, perception of the dental school environment, preferences in dental education, and future plans. The data were analyzed on the basis of ethnic or racial derivation to delineate differences in the perceptions of female dental students of various ethnic groups. Recognizing the nature of such differences may prove beneficial to dental educators, who must determine the specific problems faced by female students of various ethnic groups.
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Yonekura M, Austin G, Poll N, Hayward W. Evaluation of cerebral blood flow in patients with transient ischemic attacks and minor stroke. Surg Neurol 1981; 15:58-65. [PMID: 7256528 DOI: 10.1016/s0090-3019(81)80092-4] [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: 01/24/2023]
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Abstract
Leukemic cells of bone marrow and peripheral blood showing clusters of distinctive, large, uniform, rounded intracytoplasmic inclusions were found in a patient who had acute lymphoblastic leukemia. These membrane-bound inclusions ranged from 0.8 to 1.4 microgram in diameter and were clearly demonstrated on routinely stained preparations. Electron microscopy disclosed transitions between well-developed mitochondria and the electron-dense structures. The functional significance of these presumably altered mitochondria is uncertain. Whorled lamellar internal structures, in occasional fingerprintlike arrangements, may represent duplication of mitochondrial cristae and, functionally, may reflect increased metabolic rate or otherwise abnormal metabolism. Cytochemical studies demonstrated the presence of both periodic acid-Schiff positivity and nonspecific esterase activity in these inclusions, but no peroxidase or acid phosphatase was found. These findings support the lymphoid nature of the disorder. Immunologic surface membrane markers are consistent with this case being, as with the majority of acute lymphoblastic leukemias, of non-B, non-T cell type. Cytogenetic studies on cultured leukemic cells from bone marrow and peripheral blood showed a consistently abnormal karyotype associated with the presence of an XXY chromosomal constitution. Since no other tissues (e.g., dermal fibroblasts) were examined, the diagnosis of Klinefelter's syndrome cannot be confirmed. A causal relationship between the coexistence of the abnormal karyotype and the acute leukemia was not proven but was suspected.
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Austin G, Tenzer A. Women dental students: preferences in support services. J Dent Educ 1980; 44:319-21. [PMID: 6929305] [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: 01/22/2023]
Abstract
Female dental students in 68 American and Canadian dental schools were surveyed to determine their attitudes and concerns about women in dental school, and their preferences in support services. Almost 80 percent of the women reported that their sex did not not hinder them in achieving peak academic success. They believe that qualifications, rather than sex, should be the primary consideration in admitting students and hiring faculty. The majority of respondents indicated that the most beneficial support service for women would be a seminar series specific to their concerns. They also believe that to have women dentists used as role models in lectures and textbooks would be both appropriate and supportive.
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