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Biomedical subjects

D J Curtis

Publications and source records attributed to D J Curtis.

72 records · Page 4Linked to original sources
PubMed1979

Digital radiology in trauma using small-dose exposure.

The microdose radiology system produces a large-field examination within thirty seconds on a video monitor. This video image can be manipulated in the same manner as a computed tomography (CT) scan. The system was installed at the Maryland Institute for Emergency Services (MIEMS) to examine severely injured patients. No major abnormalities were overlooked during the examination of these patients. The microdose system is useful in providing extensive radiologic information immediately applicable to the care of massively traumatized patients.

Evaluation Studies as Topic↗
PubMed1976

Solitary lytic lesion of the skull.

Thyroid carcinoma metastatic to the calvaria may result in a lytic, well-circumscribed lesion the appearance of which necessitates differential consideration of lytic lesions of the skull. The merits of angiography in the study of such lesions are noted. Even in young persons, the possibility of metastasis presenting as a solitary lytic defect in the skull must be kept in mind.

Adult↗
PubMed1975

Staining banded human chromosomes with Romanovsky dyes: some practical consequences of the nature of the stain.

Chromatographic analyses of commercial samples of Romanovsky stains were followed by various chemical and staining studies. Strong banding of chromosomes was found to be favoured by the presence in the stain of high concentrations of methylene violet Bernthsen and its immediate homologues. Chromatographic analysis showed that these dyes are present in dry Leishman and Giemsa powders only in small proportion. However, additional active dye may be generated during the process of making up staining solutions from the dry powders, if the methanol used is not contaminated with formic acid and if the period of heating is not too brief.

Chromatography↗
PubMedDate not supplied

Timing in the normal pharyngeal swallow. Prospective selection and evaluation of 16 normal asymptomatic patients.

A review of timing of pharyngeal events with radiography has been made. A prospective selection of normal asymptomatic patients presenting for a gastrointestinal evaluation was made and timing of 55 events in the videorecorded pharyngeal swallow in these patients was performed. Only 16 normal asymptomatic patients as defined for selection were found among 870 patients presenting for gastroesophageal examination. A detailed description of their timing observations is presented. The timing data were used to temporally order events in the pharyngeal swallow. This ordering of events in the pharyngeal swallow and the data upon which it is based are reported here in detail.

Adolescent↗
PubMedDate not supplied

Social structure and seasonal variation in the behaviour of Eulemur mongoz.

Data presented here were collected during a 10-month study carried out on the mongoose lemur, Eulemur mongoz, at Anjamena in northwestern Madagascar. Baseline information is provided on behaviour and assessed for seasonal variation. Given the highly seasonal nature of the environment, remarkably little behavioural variation was observed. This may be directly linked to the cathemeral activity pattern, where differential movement into either the diurnal or the nocturnal 'niche' could reduce the effect of selective seasonal pressures, thus reducing behavioural and ecological adaptation to seasonal variation. The behavioural mechanisms of reinforcement of the pair bond through close proximity, mutual anogenital marking, paternal participation in the care of offspring and territoriality are all in accord with the general characteristics of monogamy in primates. The feature of mate monopolization by males, proposed as typical of monogamous social systems, seems to be more attributable to females in E. mongoz, as only they exhibit high levels of intrasexual aggression. Female dominance, characteristic of most species of lemur, may thus include more than just female feeding priority in E. mongoz.

Animals↗
PubMedDate not supplied

Application of clinical indicators in the emergency department.

Clinical indicators were developed and used to assess the quality of patient care resulting from the system of shared responsibility between emergency department (ED) and radiology department faculty physicians for interpretation of ED roentgenograms. The first indicator--all discrepancies in roentgenogram interpretation between ED and radiology department faculty--measured an overall discrepancy rate of 3.3% (776 films). Three hundred fifty-two apparent discrepancies were not related to the accuracy with which ED faculty interpreted films, resulting in a revised overall discrepancy rate of 1.8%. The second indicator--undesirable patient care outcomes as a result of delayed accurate radiological diagnosis--measured an occurrence rate of 0 after clinical reevaluation of more than 99% of patients within 24 hours of initial ED evaluation. Aspects of the development and use of clinical indicators are discussed in relationship to the broader monitoring and evaluating process necessary for the continuous improvement of patient care.

District of Columbia↗