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Biomedical subjects

C H Wood

Publications and source records attributed to C H Wood.

15 recordsLinked to original sources
PubMed2002

Effect of chronic renal failure on mortality rate following arterial reconstruction.

BACKGROUND: There is some evidence that patients with renal failure who have arterial procedures may have a poor outcome. This study compared the hospital mortality rate of arterial surgery in patients with chronic renal failure and those with normal renal function. METHODS: A consecutive series of 1718 patients undergoing arterial reconstructive surgery (excluding amputation) was entered prospectively on to a computerized database. Chronic renal failure was defined as a serum creatinine level over 400 micromol/l, or dialysis (either peritoneal or haemodialysis), or a successful renal transplant. Mortality was assessed at 30 days or in hospital. RESULTS: There were 69 patients (4.0 per cent) who were defined as having chronic renal failure. The mortality rate in this group was 23 per cent (16 patients) compared with 7.3 per cent (120 patients) of the 1649 patients without renal failure. The mortality rate was highest in patients undergoing urgent or emergency surgery and in those undergoing reconstruction for lower limb occlusive disease. The main causes of death were related to the cardiovascular system. CONCLUSION: Patients with chronic renal failure undergoing arterial surgery have a poor outcome compared with those with normal renal function.

Arteries↗
PubMed2000

Cost-effective carotid endarterectomy.

BACKGROUND: Although carotid endarterectomy is increasing in the UK, there is evidence that the procedure is still underused. Methods of reducing cost in a single vascular unit have been assessed using a continuous audit including outcome measures. METHODS: A consecutive series of 333 patients admitted over 7 years under a single consultant surgeon were studied. Outcome measures included the rate of perioperative neurological complication of any kind, and death. The length of hospital stay and the number of readmissions within 30 days were recorded prospectively by computerized audit. RESULTS: Over the interval of the study, the number of preoperative investigations was reduced; angiography and cerebral computed tomography were reserved for specific indications. The median duration of hospital stay decreased from 7 to 2 days. There was no change in the stroke and death rate (3 per cent) during the study and only two patients required readmission within 30 days. CONCLUSION: Carotid endarterectomy can be performed cost-effectively using non-invasive preoperative investigations for the majority of patients. In-hospital stay has been reduced and the routine use of intensive care replaced by a 2-h stay in theatre recovery. These changes have been achieved without compromising patient safety.

Adult↗
PubMed1993

The effect of added dietary soybean oil on vitamin E status of the horse.

Fourteen 2-yr-old Quarter Horses and Quarter Horse x Thoroughbreds were randomly assigned to either a control (CTRL) diet or a diet supplemented with 6.4% soybean oil (SBO). The amounts of both diets that were fed met current NRC nutrient requirements and were isoenergetic with similar nutrient:energy ratios. Venous blood samples (20 mL) were taken at d 0, 30, 60, and 90 of the experiment and analyzed for serum alpha-tocopherol, serum cholesterol, and serum triglyceride. The sum of serum cholesterol and serum triglyceride values was used as an estimate of serum total lipid. The ratio of serum alpha-tocopherol:serum total lipid was used as a measure of vitamin E status of horses. The SBO group had higher serum cholesterol concentrations (P < .001) at 30, 60, and 90 d. Serum triglyceride was not affected by diet. Serum total lipids tended to be greater (P < .06) for the SBO group. Serum alpha-tocopherol was greater (P < .001) at 90 d in the SBO group. There was a significant correlation (P < .001, r = .62) between serum total lipids and serum alpha-tocopherol concentrations in the SBO group. This correlation was not significant (P < .07, r = .35) in the CTRL group. The ratio of serum alpha-tocopherol:serum total lipid was not affected by diet. The results of this experiment suggest that vitamin E status in non-exercising, 2-yr-old horses fed currently recommended levels of vitamin E was not affected by the addition of 6.4% SBO to the diet.

Animal Feed↗
PubMed1990

The development of gender stereotype components.

Developmental research has been limited by a narrow concept of stereotypes. A more complex model is presented, and developmental changes in gender stereotypes were investigated using the new model. In 2 studies, children were told about several sex-unspecified children, each described as having 1 masculine or 1 feminine characteristic. The children then predicted the likelihood of each story child having other masculine and feminine characteristics. In Study 1, 56 children (4-6 years) were told about target children who liked either a masculine or feminine toy, and then children predicted the targets' interests in other toys. In Study 2, 76 older children (6, 8, 10 years) were told about target children with a masculine or feminine characteristic from 1 of 4 categories (appearance, personality, occupations, toys), and then they predicted the likelihood of targets having other masculine and feminine characteristics from the same and from different categories as the cue. 2 developmental trends emerged: (a) children appear first to learn associations among characteristics relevant to their own sex and, later, to learn them for the other sex, and (b) older children's stereotypic judgments are more extreme than those of younger children. The implications of these results for the development of stereotypes, assessing gender knowledge, and understanding social judgments are discussed.

Child↗
PubMed1986

Moyamoya disease: an unusual cause of cerebral infarction.

A South African Bantu patient presenting with recurrent strokes and a change in personality was found to have cerebral infarction due to moyamoya disease. The disease has a characteristic radiological pattern of narrowing or occlusion of the distal internal carotid arteries associated with a profuse vascular network at the base of the brain and in the basal ganglia: the moyamoya vessels. The clinical features and the collateral vascular pathways that may develop after cerebral vascular occlusion are discussed and the surgical options for increasing cerebral blood flow described. In this patient a development of the technique in which the superficial temporal artery is laid onto the brain without interruption of the donor vessel was used, with improvement in the clinical picture.

Adult↗
PubMed1986

Dipyridamole combined with exercise for thallium-201 myocardial imaging.

A new stress test for thallium-201 myocardial imaging in which pharmacological coronary vasodilatation with dipyridamole is combined with dynamic exercise is described. In 38 patients with coronary artery disease the sensitivity, total number of defects, degree of redistribution, and visual quality of thallium-201 imaging were greater after dipyridamole with exercise testing than after exercise alone. When the data from these 38 patients were combined with the results of dipyridamole-exercise imaging in 49 patients in whom exercise electrocardiography had been inconclusive then the technique gave a sensitivity for coronary disease of 87% and a specificity of 92%. Dipyridamole also increased the sensitivity of the exercise electrocardiogram, so that no patient with coronary disease had a strictly negative dipyridamole-exercise stress test. Only five of 214 patients who have now undergone this test have had complications requiring reversal of vasodilatation with aminophylline. The combined use of dipyridamole and exercise in this simple technique is a reliable and safe improvement on standard thallium-201 imaging tests.

Adult↗
PubMed1985

Migration, remittances and development: a study of Caribbean cane cutters in Florida.

The results of a 1981 survey of 302 Caribbean sugarcane cutters who were temporary immigrants in Florida are presented. The focus is on remittances to the islands of origin. The results provide "no evidence that seasonal stateside employment expands agricultural output, or enhances the productive capacity of small farmers in the Caribbean."

Agriculture↗
PubMed1982

The political economy of infant mortality in São Paulo, Brazil.

After the military took power in Brazil in 1964, the government adopted a wide range of policies designed to stimulate economic growth. A central aspect of the Brazilian model of development was the control of wages. From 1964 to 1975 this strategy caused the purchasing power of the minimum wage in the city of Säo Paulo to fall. The decline in the real wage index was associated with a rise in infant mortality during the period. When real wages rose after 1974, the death rate dropped off. The infant mortality trend cannot be explained by other factors that affect the actual or the reported death rate, such as changes in cityward migration, shifts in the distribution of income, and improvements in the quality of vital statistics. The findings of this study indicate a causal relationship between the infant mortality trend and changes in the purchasing power of the urban poor. Additional data on nutrition, changes in household behavior, and shifts in the cause structure of mortality support this conclusion.

Brazil↗
PubMed1982

Equilibrium and historical-structural perspectives on migration.

"The equilibrium model of labor mobility and the historical-structural perspective on population movement are summarized and critiqued. A comparative analysis identifies the sources of the growing discontinuity in the contemporary literature on migration by exploring the theoretical and methodological implications of the contrasting paradigms of socioeconomic development in which each perspective is embedded. The last section outlines an alternative approach to the study of migration by shifting the unit of analysis to the household."

Demography↗
PubMed1976

The blood groups, serum groups, red-cell isoenzymes and haemoglobins of the Sandawe and Nyaturu of Tanzania.

Blood specimens from members of the click-speaking Sandawe tribe of Tanzania and of the adjacent Bantu-speaking Nyaturu tribe have been tested for antigens of 11 blood group systems, for variants of 3 plasma-protein systems and 9 red-cell-enzyme systems, for haemoglobin variants. The results are tabulated and gene frequencies computed. For most systems, the frequencies in the two tribes are similar to one another and, in so far as data are available, similar to the neighbouring Bantu-speaking tribes. The principal genetic difference between the Sandawe and the Nyaturu is in their frequencies of haemoglobin S and of glucose-6-phosphate dehydrogenase deficiency, both of which characters are several times higher in the Nyaturu than in the Sandawe; both characters are protective against falciparum malaria, and this suggests that the Nyaturu have in the past been much more strongly exposed to this infection than the Sandawe.

Black People↗