RESUMO
Ten cases of unstable scaphoid nonunions treated with Herbert screw fixation were compared to nine cases treated with Herbert screw fixation supplemented with a single Kirschner wire (K-wire) across the fracture site. Corticocancellous bone graft from the distal radius was used in all cases to reconstruct the scaphoid. The age of the patients and duration of the nonunions were similar in both groups. Postoperative radiographs demonstrated that only 5 of 10 patients with Herbert screw fixation alone healed, while 8 of 9 patients with Herbert screw and K-wire fixation healed. The time to union averaged 4.9 months in the patients supplemented with a K-wire and 7.8 months in those patients without the K-wire.
Assuntos
Parafusos Ósseos , Ossos do Carpo/lesões , Fixação Interna de Fraturas/instrumentação , Fraturas não Consolidadas/cirurgia , Luxações Articulares/cirurgia , Articulação do Punho/cirurgia , Adolescente , Adulto , Fios Ortopédicos , Ossos do Carpo/diagnóstico por imagem , Estudos de Avaliação como Assunto , Fixação Interna de Fraturas/métodos , Consolidação da Fratura/fisiologia , Fraturas não Consolidadas/diagnóstico por imagem , Humanos , Luxações Articulares/diagnóstico por imagem , Pessoa de Meia-Idade , Radiografia , Estudos Retrospectivos , Resultado do Tratamento , Articulação do Punho/diagnóstico por imagemRESUMO
This study demonstrated the effectiveness of a computer-delivered smoking cessation program for the worksite. 58 VA Medical Center employees were randomly assigned to a computer group (computerized nicotine fading and stop-smoking contest) or a contest-only group. In comparison with the contest-only group, the computer group had nonsignificantly higher abstinence rates across follow-up, had marginally lower CO levels at the 3- and 6-month follow-ups, and smoked cigarettes with lower nicotine levels at the 10-day and 6-month follow-ups.
Assuntos
Serviços de Saúde do Trabalhador , Fumar/terapia , Software , Adulto , Monóxido de Carbono/análise , Feminino , Seguimentos , Humanos , Masculino , Pessoa de Meia-Idade , Nicotina/administração & dosagem , Distribuição AleatóriaRESUMO
Technologists who were abused as students unconsciously perpetuate abuse. If technologists will recognize the problem, counterproductive attitudes can be modified by improving their professional competencies. Our profession has a moral obligation to create a positive learning environment for our students.
Assuntos
Relações Interpessoais , Estudantes de Ciências da Saúde/psicologia , Tecnologia Radiológica/educação , Atitude , Humanos , Aprendizagem , AutoimagemRESUMO
A study undertaken in Michigan from August 1968 to April 1970 showed that the county of residence was the most significant factor for determining pesticide residue levels in humans. Occupation, sex, and location of residence were also determined to be associated with blood residue levels. Residues of sigmaDDT and dieldrin were greater in persons 45 years or older. No relationships were detected between blood hemoglobin and blood residue values. In general, as the blood levels for glucose, cholesterol, uric acid, and creatinine increased, so did the levels of pesticide residues. However, when all variables were used, no equation could be developed which would reliably predict a blood residue level given these demographic characteristics.
Assuntos
Resíduos de Praguicidas/sangue , Adolescente , Adulto , DDT/sangue , Demografia , Diclorodifenil Dicloroetileno/sangue , Dieldrin/sangue , Feminino , Humanos , Masculino , MichiganRESUMO
The present paper examines a specific genetic model as a finite Markov process, using the normal matrix approach. This model is the two locus selfing model with selection studied by Tan (1973), who used an eigenvalue approach. The properties of the process are analytically and numerically investigated and the effects of selection and cross-over on the transition from a heterozygotic parent through several generations of heterozygotic progeny are assessed. These results enlarge upon Tan's work and, in addition, present two new aspects of the model. In particular (1) the expected number of generations of heterozygotic progeny of genotype j that will descend from a heterozygotic parent of genotype i and (2) the variance of this number of generations about the mean value have not been previously considered.