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Biomedical subjects

A Busuttil

Publications and source records attributed to A Busuttil.

At least 37 records · Page 2Linked to original sources

Hanging deaths in children.

Relatively little is known about death in children following hanging. This 12-year retrospective study in southeast Scotland revealed 12 such deaths among children <15 years of age, involving 10 boys and 2 girls. The rate of hanging deaths was 0.7 deaths/100,000 children/year and was equal to that from falls in children during this time period. The children who died following hanging were aged between 4 and 14 years. All 12 children were in cardiac arrest when found, and 11 were declared dead at the scene, demonstrating the limited potential to reduce the death rate through improved treatment. Scrutiny of the circumstances surrounding each death suggested that 6 of the deaths were accidents and 6 were suicides. There appears to be some, albeit limited, potential to prevent some hanging deaths in children through increased parental supervision, education, and restriction of access to ligatures.

Accident Prevention

Non-accidental injury inflicted on a child with an air weapon.

A case of non-accidental injury to an infant caused by the discharge of an air pistol is presented, the first such case to be reported. A two-month-old baby was shot at close range by his father with a .177 air pistol. A false account of the cause of the injury was given by the father and initially supported by the mother. The pellet penetrated the skin in the centre of the child's forehead and lodged in the anterior wall of the sagittal sinus. It was removed under general anaesthetic and the child made an uncomplicated recovery. The father was subsequently convicted and jailed for the assault. The relevant literature on air weapon injuries and bizarre forms of child abuse is discussed.

Adult

Bacterial toxins and sudden unexpected death in a young child.

The sudden unexpected death of a six year old child following an upper respiratory tract infection is reported. Laboratory investigations revealed the presence of staphylococcal toxic shock syndrome toxin-1 (TSST-1) in samples of brain tissue. The significance of this finding is discussed.

Bacterial Toxins

Sudden death due to auto-immune Addison's disease in a 12-year-old girl.

A 12-year-old female suffering from adrenocortical insufficiency showed symptoms similar to a gastro-enteritis, and severe electrolytic and acid/base disturbances which progressed into cerebral oedema and death. Autopsy findings included depletion of the adrenal cortex, with enlargement and eosinophilia of surviving cells. In ante-mortem blood, anti-adrenal auto-antibodies were found and elevated levels of ACTH and cortisol with a low level of aldosterone.

Addison Disease

The use of air weapons in attempted suicide.

The use of airguns in attempted suicide is uncommon. In such instances, the surface wounds caused by discharged pellets may be inconspicuous or appear deceptively trivial to the medical examiner. Airgun pellets however are easily capable of penetrating the skull or abdominal cavity when fired at the close ranges involved in suicide attempts. The destructive power of these weapons at close range should not be underestimated. We describe three cases of attempted suicide and review the other nine cases reported in the medical literature: of the 12 suicide attempts there were three fatalities. Seventeen out of a total of 19 pellets fired penetrated either the cranial or peritoneal cavity or damaged deep structures. Most of the victims were male. The majority of wounds were right sided. Four of the attempts were extremely determined, involving repeated discharge of the airgun or the use of other means to effect suicide.

Abdominal Injuries

Pre-AIDS deaths in HIV infection related to intravenous drug use.

We prospectively collected data on deaths in the Edinburgh City Hospital HIV cohort of patients (60-70% acquired via injection drug use) from October 1986 to September 1994. Sixty-four patients (25% of all HIV deaths or 2.5/100 person-years) had died without an AIDS diagnosis, and 42 (66%) of these had autopsy data available. Some pre-AIDS deaths (20% or 0.5/100 person-years) were the expected consequence of underlying medical conditions diagnosed during life: the remainder (80% or 1.98/100 person-years) were sudden or unexpected. Examining the underlying conditions, drug overdoses accounted for 45% or 1.1/100 person-years; bacterial sepsis, 25% or 0.6/100 person-years; liver disease, 26% or 0.6/100 person-years; and an undiagnosed AIDS condition, 9% or 0.2/100 person-years. Drug overdoses were the commonest cause of pre-AIDS death in this cohort of patients predominantly infected via IDU, but many of the sudden deaths had significant underlying pathology, which may have increased their susceptibility to an overdose of drugs. In future, death before an AIDS diagnosis should be classified into Medical or Expected Non-AIDS (MNA or ENA) and Sudden Non-AIDS (SNA).

Bacterial Infections

The skeletonized body: suicidal inhalation of motorbike exhaust.

An adolescent boy who was being treated for psychiatric illness went missing. The body was discovered a year later, and he appeared to have committed suicide by inhaling the exhaust fumes from his motorbike. This report highlights the procedure used for the identification of his skeletonized body and the unusual nature of the source of exhaust fumes.

Administration, Inhalation

Homicidal tandem bullet wound of the chest.

An unusual case of a homicidal gunshot wound to the chest is reported in which two bullets were fired in unison as tandem bullets from a handgun. At autopsy, two intact bullets were retrieved from the body of the victim, yet there was only one entrance wound and a single bullet track across the chest wall and thoracic organs. An examination of the weapon and ammunition supported the likelihood of tandem bullets and suggested the probable mechanism for this event. Very few similar cases have been documented.

Crime Victims

Alcohol and house fire fatalities in Scotland, 1980-1990.

The association between house fire fatalities and high blood-alcohol concentrations has been recognized as a particular problem in Scotland. Alcohol intoxication increases the risk of the outbreak of fire and decreases the intoxicated individual's ability to effect an escape. This survey investigates the reported blood-alcohol concentrations from all Scottish fire fatalities during the 11-year period 1980-90 and analyses the data by age, sex, year and geographical location. Alcohol intoxication in fires is shown both to be a national problem and one relevant to females as well as males. Fire prevention campaigns must continue to emphasize the risk of consuming excessive quantities of alcohol in the home whilst parallel efforts to reduce the objective risk should be encouraged.

Accidents

Assessment of myocardial vasculature in chronic alcoholics without established cardiomyopathy.

Myocardial pathology and cardiac functional abnormalities known to occur in association with chronic alcohol abuse have been attributed to a direct toxic effect of ethanol on the intra-myocardial vasculature: alcohol-induced occlusion of small arteries with consequent secondary ischaemia leads to individual myocyte loss, focal fibrosis and compensatory cardiac hypertrophy. To assess the intra-myocardial arterial vessels an interactive semiautomated, computerised, high-resolution, video image-analysing system was used and the findings from hearts of alcoholics were compared with normal hearts collected at autopsy. The elastic laminae, stained with Van Gieson's stain, acted as the reference points for measurement of the diameters, circumferences and thicknesses of the vessels assessed. It was not possible to demonstrate any statistically significant morphometric changes within intra-myocardial vasculature. The same technique used is readily adaptable for the assessment of the blood vessels in other organs and tissues.

Adult

Rate, causes and prevention of deaths from injuries in south-east Scotland.

Data on all deaths after injuries in Lothian and Borders regions of south-east Scotland were collected prospectively over 2 years. Post-mortems were performed after all deaths and Injury Severity Scores (ISS) calculated. There were 331 deaths at a rate of 20 per 100,000 per year; of those who died 49 per cent were younger than 40 years and most were male; 37 per cent of deaths were caused by road traffic accidents, 16 per cent by falls and 15 per cent by hangings. Two hundred and forty-eight patients (75 per cent) were either dead when found or died instantly with unsurvivable injuries (ISS = 75). A further five patients died in the first hour after injury and before reaching hospital. Nineteen (7 per cent) died between 1 and 4 h after injury, 59 (17 per cent) died more than 4 h after. These results demonstrate the rate, causes and timing of deaths following injuries in one UK region. The pattern of these deaths differs markedly from that previously described in the US. There is no evidence to support the concept of a trimodal distribution of trauma deaths. The greatest potential to reduce the number of trauma deaths lies with prevention.

Accident Prevention

Fire fatalities in elderly people.

Fatal dwelling-house fires account for 10% of all accidental deaths in the United Kingdom with one-quarter of the deaths being of elderly people. No study had described the characteristics of elderly individuals who die in fires. We report results from a retrospective review of all fatal dwelling-house fires in Scotland from 1980 to 1990. Of 1096 people dying in fires, 243 (23%) were aged over 75. When compared with patients under the age of 75, older patients were significantly less likely to be smokers. Significantly more fires killing elderly people were caused by faulty or misused electrical items in the house, particularly electric blankets. These differences between elderly and younger individuals dying in dwelling-house fires may suggest that preventive strategies for the elderly population require a different emphasis from those for younger people.

Accidents, Home

Developmental and environmental factors that enhance binding of Bordetella pertussis to human epithelial cells in relation to sudden infant death syndrome (SIDS).

Asymptomatic infection due to Bordetella pertussis has been suggested to be one cause of sudden infant death syndrome (SIDS). We examined developmental and environmental factors previously found to affect binding of another toxigenic species, Staphylococcus aureus, to human epithelial cells: expression of the Lewis(a) antigen; infection with respiratory syncytial virus (RSV); exposure to cigarette smoke; and the inhibitory effect of breast milk on bacterial binding. Binding of two strains of B. pertussis (8002 and 250825) to buccal epithelial cells was significantly reduced by treating the cells with monoclonal antibodies to Lewis(a) (P < 0.05) and Lewis(x) (P < 0.01) antigens. Both strains bound in significantly greater numbers to cells from smokers compared with cells from non-smokers (P < 0.05). HEp-2 cells infected with RSV subtypes A or B had higher binding indices for both 8002 (P < 0.001) and 250825 (P < 0.01). On RSV-infected cells, there was significantly enhanced binding of monoclonal antibodies to Lewis(x) (P < 0.05), CD14 (P < 0.001) and CD18 (P < 0.01); and pre-treatment of cells with anti-CD14 or CD18 also significantly reduced binding of both strains of B. pertussis. Pre-treatment of the bacteria with human milk significantly reduced their binding to epithelial cells. The results are discussed in relation to our three-year survey of bacterial carriage among 253 healthy infants, their mothers and local SIDS cases between 1993-1995 and in relation to the change to an earlier immunisation schedule for infants and the recent decline in SIDS in Britain.

Antibodies, Monoclonal

Collagen alteration in an animal model of colonic diverticulosis.

BACKGROUND: Changes in the structure and integrity of the colon dependent on collagen content and crosslinkage occur with age. AIMS: This study using an animal model examines colonic collagen content and crosslinkage over the lifetime of rats on fibre deficient and higher fibre diets. METHODS: Two groups of 20 rats were fed either a fibre deficient diet (1.7 g NSP (non-starch polysaccharide)/100 g) or a higher fibre diet (13.3 g NSP/100 g) for 18 months. Diverticula were identified by postmortem examination. Caecal and colonic contents were weighed and assayed for short chain fatty acids. Collagen solubility in weak acid was measured to give an indication of the nature and amount of crosslinks in the collagen of the bowel wall. RESULTS: The incidence of colonic diverticula was greater (42.1% fibre deficient rats; 0% higher fibre rats). Colonic collagen solubility index in fibre deficient rats was significantly lower than higher fibre diet fed rats (p < 0.001 in all four sections of the large bowel). Rats with diverticula had the lowest solubility index (p < 0.001 in all four sections of the large bowel). Higher fibre diet rats had increased caecal and colonic contents, caecal and colonic tissue wet weights, and greater caecal short chain fatty acids. Fibre deficient diet fed rats had more pathological abnormalities. CONCLUSIONS: This animal model permits a study of the relation between collagen crosslinkage and the development of colonic diverticulosis. A higher fibre diet protects against collagen crosslinking and this is related to a decreased incidence of diverticula.

Aging

An association between maternal diet and colonic diverticulosis in an animal model.

BACKGROUND/AIMS: Maternal diet may have an effect on the health of the offspring in middle and later life. This study used the laboratory rat as an animal model to examine whether the fibre content of the maternal diet during pregnancy affected subsequent development of colonic diverticula in the offspring fed lifelong fibre deficient or higher fibre diets. METHODS: The parents of experimental animals were fed either a diet that was known to predispose to colonic diverticulosis or a control diet for one month prior to mating. The offspring were fed one of these diets for 18 months. The incidence of colonic diverticulosis, submucosal collagen content, collagen solubility in weak acid, and the composition of intestinal contents were then measured. RESULTS: Offspring of rats fed a higher fibre diet from higher fibre diet fed parents had 0% incidence of colonic diverticulosis. When offspring (regardless of parental diet) were fed a low fibre diet for life the acid solubility was lowered compared with rats fed lifelong higher fibre diet mean (SD) (0.044 (0.0007) v 0.073 (0.0015) sigmoid colon (ratio of soluble:insoluble collagen)); 21.1% had diverticulosis and there was reduced fibre fermentation. However, when the diet of the parents of the fibre deficient diet fed rats was considered, the animals whose mothers had a fibre deficient diet had lower acid solubility (0.032 (0.0007)) and an increased incidence of colonic diverticulosis (42.1%) than the animals fed a fibre deficient diet from higher fibre diet fed parents (p < 0.01 in all instances). CONCLUSION: Maternal diet and the subsequent nutrition of the progeny seem to be of importance in the development of colonic diverticulosis in the rat.

Animals

Can child fatalities in house fires be prevented?

OBJECTIVES: To analyse all child deaths in house fires in Scotland between 1980 and 1990. METHODS: Retrospective study of all child house fire fatalities based on the 'sudden death' investigation instigated by the procurator fiscal in whose jurisdiction the death occurred. The necropsy, toxicology, police, and fire brigade reports were examined in each case. RESULTS: There were 168 child deaths occurring in 118 house fires. In the 0-5 years age group 40% of deaths occurred in fires started as a direct result of the actions of children. The careless disposal of smoking materials was the most frequent cause of fatal fires killing older children. Upholstery and bedding were common materials of first ignition, accounting for over half the incidents. The majority of children were dead before the arrival of the emergency services and most died as a result of the inhalation of smoke. CONCLUSIONS: This survey emphasises the importance of 'self escape' which, particularly in the case of young children, requires the assistance of adult carers. The number of fires started as a result of children playing with sources of ignition raises important questions of supervision and the provision of a safe environment. There is, we contend, a need to highlight the importance of individual behaviour and responsibility while recognising the need to develop measures that are relevant to, and effective in, a particular socioeconomic context.

Adult