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Biomedical subjects

C Kelley

Publications and source records attributed to C Kelley.

44 records · Page 3Linked to original sources
PubMed1977

Heat stress, fluctuating asymmetry and prenatal selection in the laboratory rat.

Recent studies have demonstrated that stress may increase the fluctuating asymmetry of teeth and limbs in laboratory animals. The present study investigates the effects of heat on such parameters. Pregnant laboratory rats are exposed to temperatures of 33 degrees C during gestation. Increases in fluctuating asymmetry of dental dimensions as well as bone density are found for the pups of such females when compared to unstressed controls. A general increase in limb lengths is also reported for young of heat stressed animals. Prenatal selection with differential survival is suggested as a possible explanation for differences found between the experimental and control animals.

Animals↗
PubMed1977

Motivational interventions in community hypertension screening.

To evaluate different techniques intended to motivate community residents to have their blood pressures taken, five inner-city target areas with comparable, predominantly Black, populations were selected. A sample of about 200 households in each of four areas were subjected to different motivational interventions; in one of these four areas, households were approached in a series of four sequential steps. The fifth target area served as a control. Findings establish that home visits by community members trained to take blood pressure measurements (BPMs) in the home produces much larger yields of new (previously unknown) hypertensives than more passive techniques such as invitational letters and gift offers. Prior informational letters, including letters specifying time of visit, do not affect refusals or increase the yield. More "passive" motivational techniques yield a higher proportion of previously known hypertensives than the more "active" outreach efforts.

Community Health Workers↗
PubMed1977

The effects of audiogenic stress on the growth of long bones in the laboratory rat (Rattus norvegicus).

It has been demonstrated that experimentally induced cold stress produces a stunting effect in the limbs of rodents. Such an effect has also been reported for the dentition and limbs in response to other stressors (heat, cold). Recent research into the effects of various stressors on the magnitude of fluctuating dental asymmetry demonstrated that general stress increases the magnitude of fluctuating dental asymmetry in experimental animals. However, no increase in the magnitude of fluctuating asymmetry of limb length was reported as a response of general stress. In the light of such studies the present research investigates the relationship between stress and the mass per unit length of limbs. The stressor chosen for the present study was audiogenic stress as it has been demonstrated to induce the general stress syndrome and also increase the magnitude of fluctuating dental asymmetry. Audiogenic stress is found to produce increases in the magnitude of fluctuating asymmetry of the mass per unit length of long bones in the laboratory rat. Also the absolute values of long bone length and mass per unit length are significantly smaller in stressed animals when compared with controls. The relationship between the stress induced stunting of linear dimensions and the increase in the magnitude of fluctuating asymmetry is discussed.

Animals↗
PubMedDate not supplied

Accuracy of recumbent height measurement.

Since many patients requiring specialized nutritional support are bedridden, measurement of height for purposes of nutritional assessment or prescription must often be done with the patient in bed. This study examined the accuracy of measuring body height in bed in the supine position. Two measurements were performed on 108 ambulatory inpatients: (1) standing height using a standard height-weight scale, and (2) bed height using a flexible tape. Patients were divided into four groups based on which of two researchers performed each of the two measurements. Each patient was also weighed and self-reported height, weight, sex, and age were recorded. Bed height was significantly longer than standing height by 3.68 cm, but the two measurements were equally precise. It was believed, however, that this 2% difference was probably not clinically significant in most circumstances. Bed height correlated highly with standing height (r = 0.95), and the regression equation was standing height = 13.82 +/- 0.09 bed height. Patients overestimated their heights. Heights recorded by nurses were more accurate when patients were measured than when asked about their heights, but the patients were more often asked than measured.

Adolescent↗