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Biomedical subjects

E Smith

Publications and source records attributed to E Smith.

504 records · Page 28Linked to original sources
PubMedDate not supplied

Identifying priority patients for coronary angiography.

We conducted an open observational study with blinded endpoint evaluation to validate the use of the Duke treadmill score in identifying patients likely to require coronary intervention. We studied 101 consecutive patients referred for coronary angiography from a cardiology clinic. All patients had a Bruce protocol exercise test. A 70% stenosis was regarded as significant. Patients were referred for percutaneous transluminal coronary angioplasty (PTCA) or coronary artery bypass grafting (CABG) surgery, if indicated. The Duke score was calculated as follows: exercise time (min) - (5 x ST segment deviation [mm]) - (4 x angina index [text]). Patients were classified into low, medium and high risk. The patients at high risk are more likely to have a significant stenosis (53/58 vs 30/43: p = 0.01 [OR 4.59 95% CI 1.34-16.6]) and require CABG or PTCA (47/58 vs 16/43: p < 0.001 [OR 7.21 95% CI 2.69-19.8]) than those at medium/low risk. Multiple logistic regression analysis, including ST segment depression, exercise time and symptoms shows that the score independently predicts a significant stenosis (p = 0.002) and the need for coronary intervention (p = 0.001). Introducing the score can help to identify those patients who need priority investigation.

Aged↗
PubMedDate not supplied

Chemistry of inorganic arsenic in soils: II. Effect of phosphorus, sodium, and calcium on arsenic sorption.

There are more than 10000 arsenic (As) contaminated sites in Australia. The ability of soils at these contaminated sites to sorb As is highly variable and appreciable amounts of As have been recorded in the subsurface soils. The potential risk of surface and ground water contamination by As at these sites is a major environmental concern. Factors that influence adsorption capacity of soils influence the bioavailability and subsequent mobility of As in soils. In the present study we investigated the effect of PO4(3-) and Na+ and Ca2+ on the sorption of AsV and AsIII by an Oxisol, a Vertisol, and two Alfisols. The presence of P (0.16 mmol L(-1)) greatly decreased AsV sorption by soils containing low amounts of Fe oxides (<100 mmol kg(-1)), indicating competitive adsorption between P and AsV for sorption sites. In contrast, the presence of a similar amount of P had little effect on the amount of AsV adsorbed by soils with high Fe content (>800 mmol kg(-1)). However, AsV sorption substantially decreased from 0.63 to 0.37 mmol kg(-1) as P concentration was increased from 0.16 to 3.2 mmol L(-1) in selected soils. This suggests increased competition between P and AsV for soil sorption sites, through either the higher affinity or the effect of mass action of the increasing concentration of P in solution. A similar effect of P on AsIII sorption was observed in the low sorbing Alfisol and high affinity Oxisol. However, the amount of AsIII sorbed by the Oxisol was much greater than the Alfisol for all treatments. The presence of Ca2+ increased the amount of AsV sorbed compared with that of Na+ and was manifested through changes in the surface charge characteristics of the soils. A similar trend in AsIII sorption was recorded with changes in index cation, although the effect was not as marked as recorded for AsV.

Adsorption↗
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Learning to help.

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Attitude of Health Personnel↗
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Lymphocyte activation by Con A.

Con A can activate cytotoxic effector cells, helper cells and suppressor cells. In all cases Con A activates polyclonally and thus the entire T cell repertoir can be revealed by Con A activation. Nylon purified T cells cannot be activated by Con A. however, in the presence of helper cells, such as adherent cells, or in the presence of serum from several species, Con A activates purified T cells. The serum factors that are responsible for Con A activation of purified T cells are present in the albumin fraction. It is suggested that Ia molecules may be responsible for the ability of Con A to activate purified T cells and a general hypothesis for T cell activation is outlined.

Albumins↗
PubMedDate not supplied

Comparison of the effectiveness of etidocaine and lidocaine as local anesthetic agents during oral surgery.

In a double-blind study conducted in 112 patients undergoing removal of four impacted third molar teeth, etidocaine hydrochloride 1.5% solution with epinephrine 1:200,000 and lidocaine hydrochloride 2.0% solution with epinephrine 1:100,000 were used, one on each side of the face, to produce inferior alveolar nerve block, infiltration anesthesia of the maxillary tooth and hemostasis of the mucoperiosteum around each tooth.Surgically adequate anesthesia was rapidly produced by both agents but the duration of action of etidocaine was longer than that of lidocaine as reflected in more prolonged numbness of the lip and delayed onset of pain. Moreover, after etidocaine treatment fewer patients reported severe pain as the local anesthesia receded. No adverse local or systemic effects were observed in, or reported by, any of the patients.

Acetanilides↗
PubMedDate not supplied

A survey of peripheral oedema in elderly patients admitted to a geriatric ward.

Peripheral oedema is common in elderly people. This two-month survey of an acute geriatric ward found that 48% of the 63 admissions over that period had oedema either on, or during the course of their admission. In many cases this was mild and asymptomatic, but complications of oedema were the cause of admission for four patients. The oedema was often multifactorial, but gravitational forces in dependent limbs seemed to be an important factor for many cases. Few patients were receiving any specific treatment for their oedema. It is concluded that oedema may be underrecognised, and that if greater attention is paid to this problem at an earlier stage, some of the associated morbidity could be avoided.

Aged↗
PubMedDate not supplied

Prevention health practices of African American women.

Prevention health practices of African American Women (AAW) have been little studied. This study explores the participation of middle-income AAW in health promotion/disease prevention behavior. In-depth, audiotape, and semi-structured interviews were held with 36 AAW between the ages of 26 and 75 years. Results indicated that the majority of the women participate in diet control behavior for health purposes. Participation in weight management and exercise behavior was less extensive. The women were involved in other types of prevention health practices to keep healthy. The findings reveal the need for increased educational efforts in the areas of weight management, exercise behavior, mammography, and in the practice of breast self-examination. Results of the study have implications for researchers, educators, and clinicians.

Adult↗
PubMedDate not supplied

Preventive health practices of African American women.

Preventive health practices of African American women (AAW) have been little studied. This study explores the participation of middle-income AAW in health promotion/disease prevention behavior. In-depth, audiotape, and semi-structured interviews were held with 36 AAW between the ages of 26 and 75 years. Results indicated that the majority of the women participated in diet control behavior for health purposes. Participation in weight management and exercise behavior was less extensive. The women were involved in other types of preventive health practices to keep healthy. The findings reveal the need for increased educational efforts in the areas of weight management, exercise behavior, mammography, and in the practice of breast self-examination. Results of the study have implications for researchers, educators, and clinicians.

Adult↗
PubMedDate not supplied

The hippo challenge.

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Animals↗
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Edna's war.

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England↗