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Biomedical subjects

D Mohan

Publications and source records attributed to D Mohan.

At least 73 records · Page 4Linked to original sources
PubMed1987

Patterns of coverage of psychiatric emergencies.

A massive change in the detection of psychiatric cases in the emergency room was recorded when pattern of coverage was changed from "on-call" basis to "continuous physical presence" of psychiatry residents in the emergency room.

Emergency Services, Psychiatric↗
PubMed1987

A reappraisal of the relationship between arachnoid cysts of the middle fossa and chronic subdural haematoma.

It has been increasingly recognised that patients with arachnoid cysts of the middle fossa appear more susceptible to the development of subdural haematomas. Seven patients with arachnoid cysts of the middle fossa and associated subdural haematomas are presented. Intra-cystic haemorrhage, masking the presence of an arachnoid cyst on computed tomography (CT) is highlighted. Repeat of CT scanning in young patients with subdural haematomas in the absence of severe trauma is recommended. Two theories are proposed to account for the observed susceptibility to the development of subdural haematomas in these patients.

Adolescent↗
PubMed1986

A study of drug abuse in rural areas of Punjab (India).

In 1976 an epidemiological survey of drug abuse was conducted in 24 rural villages of four Community Development Blocks (CDB) in three districts of Punjab State bordering Pakistan covering 1276 households. The majority of households had one user. Both men and women reported the use of traditional drugs, i.e. alcohol, tobacco, opium and cannabis. In males, the commonest drug used was alcohol (58.3%), followed by tobacco (19.3%), opium (6.3%) and cannabis (1.2%). The majority of the female respondents were non-users, but a very small number reported use of tobacco, alcohol and opium. The observations are compared with other studies and implications discussed.

Alcohol Drinking↗
PubMed1985

An analysis of road traffic fatalities in Delhi, India.

Road use patterns in Delhi, India are very different from those in cities in highly industrialized countries. In Delhi roads are also shared by unmotorized vehicles in large numbers. This study is an attempt to understand fatal crash patterns in Delhi in 1980 using police data. The results indicate that fatality patterns in Delhi are very different from those in highly industrialized countries. Pedestrians, two-wheeler riders and bus commuters comprise 80% of fatalities and motor-vehicle occupants a small minority. It appears that priorities for safety countermeasures in Delhi would have to be significantly different from those in more industrialized high-income countries. Some short-term and long-term measures are suggested in the paper.

Accidents, Traffic↗
PubMed1984

Alcohol abuse in a rural community in India. Part I: Epidemiological study.

By systematic sampling of households after two stage proportionate random sampling of villages, a total of 4670 persons above 15 years of age were selected from the rural areas of Ajmer district in Rajasthan, India, to estimate the prevalence rate of alcohol abuse and to study its socio-demographic correlates (Part I) and the pattern and characteristics of use (Part II, submitted). The data on these aspects were collected through pre-tested questionnaires. The results showed that prevalence of alcohol abuse in the sample was 24.7% (36.1% for males and 13.4% for females) and the percentage of dependents was 3%. Relative risk of alcohol abuse in males was 3.64 with respect to females. Alcohol abuse was found to be significantly associated with religion (higher in Hindus with a relative risk of 8.65 in males and 5.21 in females), marital status (higher in married with a relative risk of 2.51 in males), age (higher in age group more than 20 years with a relative risk of 2.50 in males and 1.63 in females), family structure (higher in nuclear or joint families with a relative risk of 2.88 in males), educational status (higher in illiterates with a relative risk of 1.53 in males) and occupational status (higher in those engaged in agriculture with a relative risk of 1.43 in males and 1.80 in females). It was not significantly associated with per-capita income. These results have been compared with those in similar studies in the country and the possible reasons for differences, if any, have been discussed.

Adolescent↗
PubMed1984

Alcohol abuse in a rural community in India. Part II: characteristics of alcohol users.

This part of the study dealt with the analysis of the characteristics of alcohol users. About 50% of both male and female users were between 20 and 39 years of age; 8.1% of males and only 1.3% of females used alcohol daily or several times in a week. Desi (country) liquor was the beverage used by more than 85% of the users; 77.5% of males and 96.5% of females consumed less than one quarter of a bottle of alcohol, and 65.3% of males and 93.6% of females were taking alcohol at their houses only. The reasons given for drinking by the majority of users were 'for pleasure', 'for celebration of an event' and 'status symbol'. The quantity/frequency index analysis showed that the percentage of alcoholics was 4.2 and the remaining were social drinkers. Physical, economic and social problems were reported by a significantly higher percentage of alcoholics than social drinkers. The importance of consideration of these factors in formulating a strategy of social policy in the field of alcohol use is emphasised.

Adolescent↗
PubMed1983

Failure properties of passive human aortic tissue. II--Biaxial tension tests.

Descending mid-thoracic aortas were obtained from 16 autopsies and biaxial inflation tests performed on the tissue at dynamic (approximately 20 s-1) and quasi-static (approximately 0.01 s-1) strain rates. A bubble inflation technique was developed for this purpose. Extension histories of the specimens were recorded photographically and values of ultimate stresses and extension ratios in biaxial stretch have been calculated. Under conditions of uniform biaxial stretch the tissue consistently failed in a direction perpendicular to the long axis of the aorta and pressure values at failure were greater by a factor of two in the dynamic tests than those in the quasi-static tests.

Aorta, Thoracic↗
PubMed1983

Fatal injuries to bicyclists: the experience of Dade County, Florida.

Among 173 fatally injured bicyclists, the head or neck was the region most seriously injured in 86%. The frequency of injury to the head and neck region and the frequency of nonsurvivable (AIS 6) injury were highest among the cases aged 16 years or less. Vertebral fractures occurred most often in the highest cervical vertebra (C1) and progressively less often in lower vertebrae. The relationship between vertebral position and fracture likelihood is approximately log linear. Bicyclists with a relatively long time from injury to death tended to be older persons with survivable injuries. They often died from complications (pneumonia, pulmonary embolus) rather than directly from their injuries.

Accidents, Traffic↗
PubMed1982

Failure properties of passive human aortic tissue. I--uniaxial tension tests.

Samples of descending mid-thoracic aortas were obtained from human autopsies and experiments were performed to determine the effect of strain rate and direction of loading on the failure properties of the tissue in uniaxial tension. The tests were performed at quasi-static strain rates in the range 0.01 s-1-0.07 s-1 and dynamic tests in the range 80 s-1-100 s-1. Ultimate stress and extension ratio values have been calculated for specimens tested in the longitudinal and transverse directions of the aorta.

Adult↗
PubMed1981

Drug abuse in a farm community; a brief appraisal of a research work.

This project was initiated in the rural areas of the Punjab to assess the prevailing trends in the abuse of intoxicating drugs by rural folk, with a view to contributing to future primary mental health care planning as an integral part of comprehensive health care planning. Twenty-four villages were selected from six community development blocks in the three bordering districts of the Punjab. In the rural population, the abuse of intoxicating drugs is mainly confined to alcohol, tobacco, opium and cannabis. Among psychosocial correlates, religion was of obvious predominance. Since Sikh are non-smokers, tobacco abuse was much less among them; but they had maximum alcohol ;and opium abuse. The structure of the family and number of family members tend to move together in their association with drug abuse. In relation to income in general, drug abuse was more common at the two ends of economic scale-the richest and the poorest. Social perception of drug abuse has highlighted the fact that in villages it has still not become an illicit or underground activity. The findings suggest a number of measures for promoting future primary mental health care among rural fold of the country.

Adolescent↗
PubMed1981

Effects of synthetic detergents on in vivo activity of tissue phosphatases and succinic dehydrogenase from Mystus vittatus.

African catfish (Mystus vittatus) were exposed to three sub-lethal concentrations of Swascofix E45 (13.8, 9.2 and 4.6 mg/l) and Swascol 3L (69.3, 46.2 and 23.1 mg/l) for 15 and 30 days, and their effects on alkaline and acid phosphatase, and succinic dehydrogenase in liver, kidney and intestine were measured. The enzymes were found to be inhibited in all the tissues. Maximum inhibition (38.44%) was observed in liver alkaline phosphatase activity after 30 days with the highest concentration of Swascofix E45 and the lowest inhibition (0.118%) was found in kidney acid phosphatase activity with the lowest concentration of Swascol 3L after 15 days. Insignificant enzyme stimulation in some cases was also observed.

Acid Phosphatase↗