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1.
Surgeon ; 20(3): 177-186, 2022 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-33762159

RESUMO

INTRODUCTION: The Orthopaedic Trauma Association has recommended limitation of in-person encounters to absolute necessity. One method of ensuring standard patient care within these guidelines is through the implementation of telemedicine. AIMS: To evaluate the efficacy of telemedicine for elective orthopaedic patients in the recovery and/or rehabilitation period. METHODS: A systematic review and meta-analysis of articles in Medline/PubMed and The Cochrane Library databases was performed according to the PRISMA guidelines for prospective randomised controlled trials to compare clinical and symptomatic measures for elective patients managed routinely with remote care compared to those managed with standard in-clinic management. To be included for meta-analysis, parameters must be evaluated in ≥3 studies. RESULTS: Eleven studies were included in the meta-analyses. Both telemedicine and control cohorts were comparable for patient satisfaction (RR, 0.98; 95% CI, 0.90-1.07; I2 = 0%; p = 0.52) and patient retention analysis (RR, 1.25; 95% CI, 0.51-3.06; p = 0.54; I2 = 0%). Similarly, there was no statistical difference appreciated between cohorts for overall Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) score (p = 0.30), Timed Up and Go Test (p = 0.40), and Stair Test (p = 0.18). Significant difference did exist for visual analogue scale (VAS) scores (p = 0.02) in favour of in-clinic management. CONCLUSION: Telemedicine will serve an integral aspect of healthcare delivery throughout the current COVID-19 pandemic and beyond in an effort to deliver safe, efficient and time-sensitive care to the orthopaedic patient population. The results of our meta-analyses indicate that virtual consultations are as effective as traditional in-person consultations for the care of elective orthopaedic patients in the recovery and rehabilitation period. However, further studies are needed to evaluate for initial consultations and certain sub-specialties of orthopaedics.


Assuntos
Ortopedia , Telemedicina , COVID-19/epidemiologia , Humanos , Ortopedia/métodos , Equilíbrio Postural , Estudos Prospectivos , Ensaios Clínicos Controlados Aleatórios como Assunto , Estudos de Tempo e Movimento
3.
Ir Med J ; 113(7): 131, 2020 07 30.
Artigo em Inglês | MEDLINE | ID: mdl-33205644

RESUMO

Introduction Bilateral cervical facet dislocation (BCFD) is an uncommon injury with a high incidence of severe neurological impairment. We describe 4 cases of BCFD with preserved neurological function. Cases Case 1: A 78-year-old female who suffered two ground level falls (GLFs). Pre-operative American Spinal Injury Association (ASIA) Score was C5D. Imaging revealed a BCFD at C6/C7 and a C6 laminar fracture. Case 2: A 63-year-old male suffered a fall down 14 steps. Pre-operative ASIA score was E. Imaging demonstrated a BCFD at C7/T1, and a C6 laminar fracture. Case 3: A 46-year-old male collided with a tree while descending a hill on a bicycle. Pre-operative ASIA score was C6D. Imaging revealed a BCFD at C7/T1 and a C7 laminar fracture. Case 4: A 67-year-old male suffered a GLF while exiting a stationary car. Pre-operative ASIA score on admission was E. Imaging revealed a BCFD at C6/C7 with bilateral laminar fractures at C5 and C6. Outcome All cases underwent 2-stage surgical fixation. All cases maintained or had an improved ASIA score post-operatively. Conclusion In all cases, the presence of concurrent laminar fractures resulted in an auto-decompression of the spinal canal, preserving neurological function.


Assuntos
Vértebras Cervicais/lesões , Descompressão , Fratura-Luxação/fisiopatologia , Fixação de Fratura/métodos , Fraturas da Coluna Vertebral/fisiopatologia , Acidentes por Quedas , Idoso , Vértebras Cervicais/diagnóstico por imagem , Vértebras Cervicais/cirurgia , Feminino , Fratura-Luxação/diagnóstico por imagem , Fratura-Luxação/cirurgia , Humanos , Masculino , Pessoa de Meia-Idade , Doenças do Sistema Nervoso/prevenção & controle , Traumatismos da Medula Espinal/prevenção & controle , Fraturas da Coluna Vertebral/diagnóstico por imagem , Fraturas da Coluna Vertebral/cirurgia , Tomografia Computadorizada por Raios X , Tração/métodos , Índices de Gravidade do Trauma , Resultado do Tratamento
6.
Emerg Radiol ; 26(5): 531-540, 2019 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-31250231

RESUMO

PURPOSE: Fractures of the trapezium are rarely diagnosed on plain radiographs after acute wrist trauma. High-resolution cross-sectional imaging identifies fractures of the trapezium as the most common radiographically occult carpal bone fracture. We review the fracture frequency, mechanisms and patterns of trapezium fractures. METHODS: Cone beam CT was performed in patients with suspected radiographically occult radiocarpal fracture following acute injury. The frequency of carpal bone fractures was assessed and compared. RESULTS: Ninety-three radiographically occult wrist fractures were identified in 166 patients with acute trauma and negative radiographs. The trapezium was the most frequently fractured carpal bone, making up 20.4% of wrist fractures. Seventy-nine percent of trapezium fractures involved the volar ridge. The scaphoid was the clinically suspected fractured bone at initial assessment in 84% of patients with trapezium fractures. CONCLUSION: Fractures of the trapezium in acute wrist trauma are much more common than described in the literature. If initial radiographs are negative, a fracture of the trapezium is more likely to be present than one of the scaphoid, despite high levels of clinical suspicion for scaphoid injuries. Awareness of the types and mechanisms of trapezium fracture is important. Cross-sectional imaging should be considered in all cases of post-traumatic wrist pain with negative radiographs.


Assuntos
Tomografia Computadorizada de Feixe Cônico , Fraturas Ósseas/diagnóstico por imagem , Osso Escafoide/diagnóstico por imagem , Osso Escafoide/lesões , Trapézio/diagnóstico por imagem , Trapézio/lesões , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Diagnóstico Diferencial , Feminino , Humanos , Masculino , Pessoa de Meia-Idade
7.
Colorectal Dis ; 21(12): 1364-1371, 2019 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-31254432

RESUMO

AIM: Management of anastomotic leakage (AL) following rectal resection has evolved with increasing use of less invasive techniques. The aim of this study was to review the management of AL following restorative rectal cancer resection in a tertiary referral centre. METHOD: A retrospective review of a prospectively maintained database was performed. The primary outcome was successful management of AL. The secondary outcome was the impact of AL on oncological outcome. RESULTS: Five hundred and two restorative rectal cancer resections were performed during the study period. The incidence of AL was 9.9% (n = 50). AL occurred more commonly following neoadjuvant chemoradiotherapy (n = 31/252, 12.3%) than in those who did not receive neoadjuvant chemoradiotherapy (n = 19/250, 7.6%; P = 0.107); however, this was not statistically significant. Successful minimally invasive drainage was achieved in 28 patients (56%, radiological n = 24, surgical n = 4). Trans-rectal drainage was the most common drainage method (n = 14). The median duration of drainage was longer in the neoadjuvant group (27 vs 18 days). Surgical intervention was required in 11 patients, with anastomotic takedown and end-colostomy formation was most commonly required. Successful management of AL with drainage (maintenance of the anastomosis without the need for further intervention) was achieved in 26 of the 28 patients. There were no significant differences in overall or disease-free survival when patients with AL were compared with patients without AL (69.4% vs 72.6%, P = 0.99 and 78.7% vs 71.3%, P = 0.45, respectively). CONCLUSION: In selected patients, AL following restorative rectal resection can be effectively controlled using minimally invasive radiological or surgical drainage without the need for further intervention.


Assuntos
Fístula Anastomótica/terapia , Drenagem/métodos , Protectomia/efeitos adversos , Neoplasias Retais/cirurgia , Cirurgia Endoscópica Transanal/métodos , Adulto , Idoso , Idoso de 80 Anos ou mais , Canal Anal/cirurgia , Anastomose Cirúrgica/efeitos adversos , Fístula Anastomótica/etiologia , Quimiorradioterapia/efeitos adversos , Bases de Dados Factuais , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Terapia Neoadjuvante/efeitos adversos , Estudos Prospectivos , Reto/cirurgia , Estudos Retrospectivos , Centros de Atenção Terciária , Resultado do Tratamento
8.
Ir Med J ; 111(10): 843, 2018 12 06.
Artigo em Inglês | MEDLINE | ID: mdl-30560639

RESUMO

Introduction Perinatal lumbar discectomy for lumbar disc herniation or cauda equina syndrome is a rare clinical scenario. This case series outlines the surgical management of this clinical scenario at a national tertiary referral centre over a 10-year period Methods A retrospective review of all females who underwent discectomy / decompression for lumbar disc herniation or cauda equina syndrome in the perinatal period at a national tertiary referral centre for spine surgery over a 10-year period between January 2008 to December 2017. Results 6 cases required surgical intervention. All patients were successfully managed with surgical decompressive procedures and recovered well in the postoperative period without complication. Conclusions The principles of management remain the same in the pregnant and non-pregnant populations, although treatment options are complicated by the desire to avoid risk to the developing foetus. Surgical intervention is safe to both mother and baby and if performed promptly is associated with an excellent functional outcome.


Assuntos
Síndrome da Cauda Equina/cirurgia , Deslocamento do Disco Intervertebral/cirurgia , Vértebras Lombares , Complicações na Gravidez , Adulto , Descompressão Cirúrgica/métodos , Feminino , Humanos , Deslocamento do Disco Intervertebral/diagnóstico por imagem , Imageamento por Ressonância Magnética , Gravidez , Estudos Retrospectivos , Fatores de Tempo , Resultado do Tratamento
9.
BMC Med Inform Decis Mak ; 16: 75, 2016 06 24.
Artigo em Inglês | MEDLINE | ID: mdl-27343060

RESUMO

BACKGROUND: The use of telemonitoring is a promising approach to optimizing outcomes in the treatment of heart failure (HF) for patients living in the community. HF telemonitoring interventions, however, have not been tested for use with individuals residing in disparity communities. METHODS: The current study describes the results of a community based participatory research approach to adapting a telemonitoring HF intervention so that it is acceptable and feasible for use with a lower-income, Black and Hispanic patient population. The study uses the ADAPT-ITT framework to engage key community stakeholders in the process of adapting the intervention in the context of two consecutive focus groups. In addition, data from a third focus group involving HF telemonitoring patient participants was also conducted. All three focus group discussions were audio recorded and professionally transcribed and lasted approximately two hours each. Structural coding was used to mark responses to topical questions in the interview guide. RESULTS: This is the first study to describe the formative process of a community-based participatory research study aimed at optimizing telehealth utilization among African-American and Latino patients from disparity communities. Two major themes emerged from qualitative analyses of the focus group data. The first theme that arose involved suggested changes to the equipment that would maximize usability. Subthemes identified included issues that reflect the patient populations targeted, such as Spanish translation, font size and medical jargon. The second theme that arose involved suggested changes to the RCT study structure in order to maximize participant engagement. Subthemes also identified issues that reflect concerns of the targeted patient populations, such as the provision of reassurances regarding identity protection to undocumented patients in implementing an intervention that utilizes a camera, and that their involvement in telehealth monitoring would not replace their clinic care, which for many disparity patients is their only connection to medical care. CONCLUSIONS: The adaptation, based on the analysis of the data from the three focus groups, resulted in an intervention that is acceptable and feasible for HF patients residing in disparity communities. TRIAL REGISTRATION: NCT02196922 ; ClinicalTrials.gov (US National Institutes of Health).


Assuntos
Negro ou Afro-Americano , Pesquisa Participativa Baseada na Comunidade/métodos , Insuficiência Cardíaca/diagnóstico , Hispânico ou Latino , Monitorização Ambulatorial/métodos , Pesquisa Qualitativa , Telemedicina/métodos , Pesquisa Participativa Baseada na Comunidade/normas , Disparidades em Assistência à Saúde , Insuficiência Cardíaca/terapia , Humanos , Monitorização Ambulatorial/normas , Telemedicina/normas
10.
J Rehabil Res Dev ; 51(7): 1035-46, 2014.
Artigo em Inglês | MEDLINE | ID: mdl-25436619

RESUMO

The current study examined relationships among self-reported depression severity, posttraumatic stress disorder (PTSD) symptom severity, and grade point average (GPA) among student servicemembers and veterans. We asked 422 student servicemembers and veterans (72% male, 86% Caucasian, mean age = 36.29 yr) to complete an anonymous online survey that assessed self-reported GPA, depression severity, PTSD severity, and frequency of academic problems (late assignments, low grades, failed exams, and skipped classes). Female respondents reported a slightly higher GPA than males (3.56 vs 3.41, respectively, p = 0.01). Depression symptoms (beta weight = -0.174, p = 0.03), male sex (beta weight = 0.160, p = 0.01), and younger age (beta weight = 0.155, p = 0.01) were associated with lower GPA but not PTSD symptoms (beta weight = -0.040, p = 0.62), although the interaction of depression and PTSD symptoms showed a nonsignificant inverse relationship with GPA (beta weight = -0.378, p = 0.08). More severe depression was associated with turning in assignments late (beta weight = 0.171, p = 0.03), failed exams (beta weight = 0.188, p = 0.02), and skipped classes (beta weight = 0.254, p = 0.01). The relationship of depression with self-reported GPA was mediated by frequency of failed examns. Results suggest that student servicemembers and veterans with greater emotional distress also report worse academic performance.


Assuntos
Depressão/psicologia , Militares/psicologia , Transtornos de Estresse Pós-Traumáticos/psicologia , Estudantes/psicologia , Veteranos/psicologia , Adulto , Idoso , Avaliação Educacional , Escolaridade , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Escalas de Graduação Psiquiátrica , Autorrelato , Fatores Sexuais , Estados Unidos , Adulto Jovem
11.
Seizure ; 22(6): 472-5, 2013 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-23102834

RESUMO

PURPOSE: In the United Kingdom all health care providers are encouraged to consult with user groups. The submissions of charities and patient advocacy groups to NICE and SIGN are considered reflective of the patient groups they purport to represent, yet little is known about how representative they are. This pilot study was designed to ascertain how many patients attending a hospital based epilepsy clinic were members of such advocacy groups. METHODS: Patients were asked to complete a brief 9-question questionnaire before they left the clinic. RESULTS: One hundred and twenty-five questionnaires were distributed, of which 101 were returned. Seventeen percent of patients were members of advocacy groups, with several being members of more than one charity/group. Only seven percent of the respondents had ever been contacted by an advocacy group to canvass their opinions. Seventy percent of patients questioned stated they thought a frank discussion with their physician, or specialist nurse was more likely to influence patient services. Patients with long duration of disease and taking multiple anti-epileptic drugs were more likely to be members of charity/advocacy groups. CONCLUSIONS: As patient charities in the U.K. are often in receipt of public funds, and actively seek to influence public policy this raises the question of whether they should be required to consult more widely with the people they claim to represent.


Assuntos
Instituições de Caridade , Epilepsia/economia , Epilepsia/psicologia , Defesa do Paciente , Encaminhamento e Consulta , Adolescente , Criança , Epilepsia/epidemiologia , Feminino , Humanos , Masculino , Projetos Piloto , Apoio Social , Inquéritos e Questionários , Reino Unido/epidemiologia , Adulto Jovem
12.
Transl Behav Med ; 1(1): 175-181, 2011 Mar 01.
Artigo em Inglês | MEDLINE | ID: mdl-23662166

RESUMO

In February 2009, the US Congress passed the Health Information Technology for Economic and Consumer Health (HITECH) Act in order to stimulate the "meaningful use" of health information technology within medical practice. Economists have noted that other sectors in the economy have demonstrated substantive productivity improvements from investments in information technology but that the health sector lags behind. The "meaningful use" stipulation of the HITECH Act focuses systems redesign within the health sector on user's behavior, a provision that opens a window of contribution from specialists in behavioral medicine. There are several ways for behavioral medicine to become involved in the redesign. One is to help craft a health services environment that optimizes communication between providers and patients, between primary care and specialist care providers, and between patients and their caregivers. Another is to help practitioners and policy-makers create new "decisional architectures" for "nudging" behavior in positive ways through better incentives, understandable instructions, healthy defaults, instructive feedback, back-ups for error, and structured decision-making. New funding opportunities in research, implementation, and training may facilitate the involvement of behavioral medicine-an involvement that is crucial for ensuring the success of reform efforts in the long run.

13.
Allergy ; 64(8): 1121-9, 2009 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-19208087

RESUMO

BACKGROUND: Allergic inflammation is associated with Th2-type T cells, which can be suppressed by CD4+ CD25+ regulatory T cells (Tregs). Both express chemokine receptors (CCR) 4 and CCR8, but the dynamics of expression and effect of atopic status are unknown. OBJECTIVE: To examine the expression of chemokine receptors by CD4+ CD25+ and CD4+ CD25- T cells from atopic and nonatopic donors, and document response to allergen stimulation in vitro. METHODS: Chemokine receptor expression was examined by flow cytometry and quantitative PCR of CD4+ CD25hi and CD4+ CD25- T cells from atopics and nonatopics. Responsiveness to chemokines was by actin polymerization. Dynamics of chemokine receptor expression in 6-day allergen-stimulated cultures was analysed by carboxyfluoroscein succinimidyl ester labelling. RESULTS: CD4+ CD25hi Tregs preferentially expressed CCR3, CCR4, CCR5, CCR6 and CCR8. CD4+ CD25hi Tregs responded to the chemokine ligands for CCR4, CCR6 and CCR8 (CCL17, 22, 20 and 1 respectively), with no differences between atopic and nonatopic donors. Over 6-day allergen stimulation, CD4+ CD25+ T-cells downregulated CCR4 and upregulated CCR7, in contrast to CD4+ CD25- effector cells, which downregulated CCR7 and upregulated CCR4. CONCLUSIONS: CCR4, CCR6 and CCR8 have potential roles in localization of both CD4+ CD25+ regulatory and CD4+ CD25- effector T cells to sites of allergic inflammation. Upregulation of CCR7 and downregulation of CCR4 upon allergen stimulation of Tregs may allow their recirculation from sites of inflammation, in contrast to retention of effector T cells.


Assuntos
Hipersensibilidade Imediata/imunologia , Receptores CCR4/imunologia , Receptores CCR6/imunologia , Receptores CCR8/imunologia , Linfócitos T Reguladores/imunologia , Alérgenos/imunologia , Antígenos CD4/imunologia , Células Cultivadas , Citometria de Fluxo , Regulação da Expressão Gênica , Humanos , Subunidade alfa de Receptor de Interleucina-2/imunologia , Receptores CCR4/genética , Receptores CCR6/genética , Receptores CCR8/genética
14.
J Pept Res ; 57(6): 494-506, 2001 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-11437953

RESUMO

Six photoactivatable analogs of the human thrombin receptor activating peptide (TRAP), SFLLRN-NH2, were synthesized by substituting the photoactive amino acid, p-benzoylphenylalanine (Bpa), into each position of the peptide sequence. Platelet aggregation assays indicated that the peptides with Bpa substitutions at positions 3 to 6 retained agonist activity. These peptides were prepared in tritiated form as potential thrombin receptor photoaffinity labels. The [3H]Bpa-containing analogs were constructed by resynthesizing the peptides with the amino acid, 4-benzoyl-2',5'-dibromophenylalanine (Br2Bpa), and subjecting the purified peptides to Pd-catalyzed tritiodebromination. The radiochemical yields for the reductive tritiation were < 2% for peptides with [3H]Bpa in the third and fourth positions, and between 7 and 16% for the peptides with substitutions at the fifth and sixth positions. The low yields were due to over-reduction of the Bpa carbonyl group and nonspecific degradation during reductive tritiation. This report describes the first use of Br2Bpa for the preparation of tritiated photoactivatable peptides.


Assuntos
Fragmentos de Peptídeos/farmacologia , Receptores de Trombina/agonistas , Plaquetas/efeitos dos fármacos , Reagentes de Ligações Cruzadas , Humanos , Ligantes , Luz , Fragmentos de Peptídeos/síntese química , Fenilalanina/análogos & derivados , Fenilalanina/química , Marcadores de Fotoafinidade , Receptor PAR-1 , Trítio/química
15.
Vaccine ; 19(30): 4185-93, 2001 Jul 20.
Artigo em Inglês | MEDLINE | ID: mdl-11457544

RESUMO

Poly(lactide-co-glycolide) (PLG) microspheres were tested as a parenteral delivery system for human beta-amyloid (1-42) (Abeta), a potential immunotherapeutic undergoing assessment in Phase 1 studies for Alzheimer's disease (AD). Abeta was successfully encapsulated in PLG microspheres of average sizes of 3 or 15 microm diameter. Swiss Webster (SW) mice were injected by the sub-cutaneous (s.c.) or intra-peritoneal (i.p.) routes with 3-33 microg Abeta. Abeta-PLG microparticles (3 microm) induced dose-dependent antibody responses, which were maximal at 33 microg Abeta, while Abeta in phosphate-buffered saline (PBS) produced weak antibody responses at the same doses by both routes. Significantly increased antibody responses were seen for both small and large particle formulations given by the i.p. route in comparison to the s.c route. It was previously reported that passive immunisation with Abeta-specific antibodies cleared amyloid plaques in a mouse model of AD (Bard F, Cannon C, Barbour R, et al. Peripherally administered antibodies against amyloid beta-peptide enter the nervous system and reduce pathology in a mouse model of Alzheimer disease. Nature Med 2000;6:916-19), an indication that induction of serum antibody is a prerequisite for efficacy.


Assuntos
Peptídeos beta-Amiloides/administração & dosagem , Anticorpos/sangue , Poliglactina 910/administração & dosagem , Peptídeos beta-Amiloides/imunologia , Animais , Biodegradação Ambiental , Relação Dose-Resposta Imunológica , Imunização , Camundongos , Microesferas , Tamanho da Partícula
16.
Am J Psychiatry ; 158(5): 783-7, 2001 May.
Artigo em Inglês | MEDLINE | ID: mdl-11329402

RESUMO

OBJECTIVE: The authors' goal was to assess the degree to which hypochondriasis is accompanied by a heightened sense of risk of disease and other physical hazards. METHOD: Fifty-six patients meeting DSM-III-R criteria for hypochondriasis were compared with 127 nonhypochondriacal patients from the same primary care setting. Both groups completed a self-report questionnaire assessing the degree to which they felt at risk of developing various medical diseases or being subject to injury from accidents or criminal assault. RESULTS: Both groups of patients exhibited an optimistic bias in that they considered themselves to be less at risk than others of their age and sex. However, the hypochondriacal group had a significantly higher total risk score than did the nonhypochondriacal group. In large part, this intergroup difference was the result of the hypochondriacal patients' perception that they were likely to develop various diseases. The hypochondriacal group did not score significantly higher than the comparison group in estimating their risk of succumbing to accidents and criminal victimization. Perceived risk was significantly associated with the self-reported tendency to amplify benign bodily sensations. CONCLUSIONS: An exaggerated appraisal of risk, jeopardy, and vulnerability to disease may be part of the cognitive distortion seen in hypochondriasis. If this is confirmed, cognitive and behavioral therapies for hypochondriasis may need to include a focus on these patients' understanding and appraisal of risk.


Assuntos
Atitude Frente a Saúde , Nível de Saúde , Hipocondríase/diagnóstico , Risco , Transtornos Cognitivos/diagnóstico , Transtornos Cognitivos/psicologia , Terapia Cognitivo-Comportamental , Estudos Transversais , Feminino , Humanos , Hipocondríase/psicologia , Hipocondríase/terapia , Masculino , Pessoa de Meia-Idade , Atenção Primária à Saúde , Medição de Risco , Inquéritos e Questionários
17.
Biochem Pharmacol ; 61(6): 657-63, 2001 Mar 15.
Artigo em Inglês | MEDLINE | ID: mdl-11266650

RESUMO

MRS 1754 [N-(4-cyanophenyl)-2-[4-(2,3,6,7-tetrahydro-2,6-dioxo-1,3-dipropyl-1H-purin-8-yl)-phenoxy]acetamide] is a selective antagonist ligand of A(2B) adenosine receptors. This is the least well-defined adenosine receptor subtype, and A(2B) antagonists have potential as antiasthmatic drugs. For use as a radioligand, MRS 1754, a p-cyanoanilide xanthine derivative, was tritiated on the propyl groups in a two-step reaction using a p-carboxamido precursor, which was dehydrated to the cyano species using trifluoroacetic anhydride. [3H]MRS 1754 (150 Ci/mmol) bound to recombinant human A(2B) adenosine receptors in membranes of stably transfected HEK-293 cells. Specific binding was saturable, competitive, and followed a one-site model, with a K(D) value of 1.13 +/- 0.12 nM and a B(max) value of 10.9 +/- 0.6 pmol/mg protein. Specific binding utilizing 0.7 nM [3H]MRS 1754 was > 70% of total binding. The affinity calculated from association and dissociation binding constants was 1.22 nM (N = 4). Binding to membranes expressing rat and human A(1) and A(3) adenosine receptors was not significant, and binding in membranes of HEK-293 cells expressing human A(2A) receptors was of low affinity (K(D) > 50 nM). The effects of cations and chelators were explored. Specific binding was constant over a pH range of 4.5 to 6.5, with reduced binding at higher pH. The pharmacological profile in competition experiments with [3H]MRS 1754 was consistent with the structure-activity relationship for agonists and antagonists at A(2B) receptors. The K(i) values of XAC (xanthine amine congener) and CPX (8-cyclopentyl-1,3-dipropylxanthine) were 16 and 55 nM, respectively. NECA (5'-N-ethylcarboxamidoadenosine) competed for [3H]MRS 1754 binding with a K(i) of 570 nM, similar to its potency in functional assays. Thus, [3H]MRS 1754 is suitable as a selective, high-affinity radioligand for A(2B) receptors.


Assuntos
Acetamidas/farmacologia , Antagonistas de Receptores Purinérgicos P1 , Purinas/farmacologia , Compostos Radiofarmacêuticos/farmacologia , Acetamidas/síntese química , Acetamidas/química , Células Cultivadas , Humanos , Purinas/síntese química , Purinas/química , Ensaio Radioligante , Compostos Radiofarmacêuticos/síntese química , Compostos Radiofarmacêuticos/química , Receptor A2B de Adenosina , Trítio
18.
Compr Psychiatry ; 41(3): 179-83, 2000.
Artigo em Inglês | MEDLINE | ID: mdl-10834626

RESUMO

Although hypochondriasis is generally believed to be a chronic and refractory disorder, relatively little is known about its natural history and course. Based on a cognitive/perceptual model of hypochondriasis, we hypothesized that the disorder would be more chronic in patients who both amplify benign bodily symptoms and tend to attribute them to disease. Thirty-eight patients with DSM hypochondriasis were assessed with a structured, diagnostic interview and self-report questionnaire. A logistic regression model containing sociodemographic characteristics and a 3-way interaction term composed of the tendency to amplify bodily sensations, the tendency to attribute common symptoms to disease, and somatization (all measured at inception) correctly classified the remission status of 81.6% of the patients at follow-up 4 years later. These results suggest that patients who somatize, who are amplifiers of bodily sensation, and those who tend to attribute ambiguous symptoms to disease have more chronic and more refractory hypochondriasis. It is the co-occurrence of these cognitive and perceptual characteristics, rather than their occurrence individually, which predicts the persistence of this disorder.


Assuntos
Adaptação Psicológica , Hipocondríase/diagnóstico , Escalas de Graduação Psiquiátrica/estatística & dados numéricos , Papel do Doente , Adulto , Idoso , Doença Crônica , Estudos de Coortes , Feminino , Seguimentos , Humanos , Hipocondríase/psicologia , Masculino , Pessoa de Meia-Idade , Psicometria , Reprodutibilidade dos Testes , Transtornos Somatoformes/diagnóstico , Transtornos Somatoformes/psicologia
19.
Physician Exec ; 26(4): 52-5, 2000.
Artigo em Inglês | MEDLINE | ID: mdl-11183235

RESUMO

In most cases, the practice acquisition and employment strategy of the 1990s has backfired, with acquired physician practices losing in the range of $50,000 to $100,000 or more per physician annually. There are two alternatives for addressing the operating deficits incurred from practice ownership and physician employment: (1) restructuring through the implementation of network-wide and practice-specific initiatives to improve financial performance; or (2) wholesale (i.e., all practices) or selective practice divestiture, depending on the individual practice financial performance and "fit" with the physician network strategic priorities. Unraveling a decade's worth of physician-health system relationships that are grounded by the notion of acquisition and employment is going to be a complex process for both parties. But given the magnitude of financial losses on acquired practices and the inability of health care providers to sustain future losses, there simply are not options beyond restructuring or divesting these relationships.


Assuntos
Mobilidade Ocupacional , Diretores Médicos , Atenção Primária à Saúde/organização & administração , Prática Privada/organização & administração , Emprego , Humanos , Satisfação no Emprego , Determinação do Valor Econômico de Organizações de Saúde , Estados Unidos
20.
Psychosomatics ; 40(5): 396-403, 1999.
Artigo em Inglês | MEDLINE | ID: mdl-10479944

RESUMO

The authors studied the relative contributions of psychological characteristics and rheumatoid arthritis (RA) morbidity to RA symptoms and medication side effects. Thirty-one consecutive patients attending an RA clinic completed self-report questionnaires and diaries assessing RA symptoms and somatic style, a constellation of beliefs, attitudes, and concerns about disease and health. After 3 months, the patients were assessed for RA symptoms and self-reported medication side effects. At inception, RA symptoms were associated with several components of somatic style. At 3-month follow-up, changes in RA symptoms and the incidence of medication side effects were predicted by somatic style variables measured at inception. The symptoms of RA and the side effects of RA pharmacotherapy are prospectively predicted by somatic style as well as by the severity and extent of RA.


Assuntos
Antirreumáticos/efeitos adversos , Artrite Reumatoide/tratamento farmacológico , Artrite Reumatoide/psicologia , Personalidade , Transtornos Somatoformes/tratamento farmacológico , Transtornos Somatoformes/psicologia , Adulto , Idoso , Monitoramento de Medicamentos/psicologia , Feminino , Humanos , Masculino , Análise de Regressão , Estudos de Amostragem , Autoavaliação (Psicologia) , Índice de Gravidade de Doença , Inquéritos e Questionários , Resultado do Tratamento
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