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Biomedical subjects

P Benson

Publications and source records attributed to P Benson.

54 records · Page 3Linked to original sources

Who provides health care to children and adolescents in the United States?

Face-to-face visits by children and adolescents in office-based practice in the mid-1970s were studied. Pediatricians, family physicians, and general practitioners accounted for 35%, 6%, and 30%, respectively, of all child visits. Although 40% to 45% of preventive and medical encounters were with pediatricians, only 12% of visits for minor surgery, 20% of visits for psychosocial problems, and 9% of visits for combined medical-surgical reasons were to pediatricians. Only in very young children did pediatricians provide a substantial proportion of care for each of the types of visits. For some common diagnoses (acne, refractive error) most care was provided by specialists other than primary care specialists, but less than 16% of all preventive care visits (including routine eye examinations) was provided by specialists other than primary care physicians. A substantial proportion of the prenatal care and management of minor trauma was provided by family physicians and general practitioners. Although the limitations of the study (including an average response rate of 55%, exclusion of certain specialties and institutional physicians, sampling at different times of the year, lack of control for area of location of practice, and lack of information about response rates of different types of physicians within each specialty) preclude definitive conclusions, the findings raise important questions for future study.

Adolescent↗

Psychophysiological ante-natal predictors of post-natal depressed mood.

Forty-seven women were studied during the course of pregnancy in an attempt to predict which of them would later rate themselves as suffering from depressed mood post-natally. Psychometric and physiology measures were used in the three trimesters of pregnancy and six weeks after birth. The psychometric measures used ante-natally and post-natally comprised the Hostility and Direction of Hostility Questionnaire, and Locus of Control Scale, the DSSI/SAD sub-scale to measure anxiety, and the Zung Self-Rating Scale to measure depression. Psychophysiological measures used water heart-rate and blood pressure. Post-natal ratings of depression were associated with a high ante-natal score on overall hostility. Women with high anxiety and hostility ratings had a more pronounced response to the sound of a baby crying than to noise of similar frequency and intensity. This more pronounced heart response was also related to later post-natal depression ratings. However, by far the most useful predictive measure was the Hostility and Direction of Hostility Questionnaire: its predictive power in the first trimester of pregnancy was almost as good as in the third trimester.

Anxiety↗

Comparisons between inner-city and private school adolescents' perceptions of health problems.

A youth health survey was administered to 247 students in an inner-city ghetto high school and 404 students in a private boarding school. Significant differences between the two socioeconomic groups were found for responses about health information, health concerns and problems, and health status and service utilization. Sex-related issues were of greater concern to the private school youth and they desired more help with depression-sadness and birth control. Inner-city youth had more health worries and indicated a desire for more help with physical problems such as toothaches, headaches, and stomach aches, and social problems such as racial discrimination and parent relations. From a list of 22 health problems, the inner-city youth ranked dental problems, acne, and health worries highest while the private school youth ranked depression-sadness, tiredness, and acne highest. Regardless of social class, most adolescents perceived large gaps in their health education. One implication of our data is that the specific self-reported needs and concerns of adolescents should be considered in planning health services and education programs.

Adolescent↗

Air filtration.

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Air Microbiology↗

On hemispheric differences in evoked potentials to speech stimuli.

Eight subjects listened to lists of speech sounds (pa or ba) or pure tones (250 or 600 c/sec). Within each list one of the sounds (the "frequent") occurred more often than the other (the "target") in a ratio of approximately 4:1. Subjects were required to count the targets in each list; concurrently, evoked responses to both targets and frequents were being separately averaged from electrodes at vertex at symmetrical left and right parietal locations. The evoked responses show the expected sequence of deflections at all three electrode sites, including large P3 waves (about 350 msec latency) to the target stimuli. However, the left and right hemispheric responses to speech or tones, either frequent or target, were strikingly similar, both to the eye and by statistical tests intended to reveal differences between them.

Auditory Perception↗

Cytomegalovirus infection in newborns and their family members: polymerase chain reaction analysis of isolates.

Polymerase chain reaction (PCR) analysis with primers for the pp65, a-sequence, glycoprotein B, and major immediate early genes of human cytomegalovirus (CMV) was used to study five congenitally-infected infants and their CMV-infected family members. Family members excreting CMV included three mothers and two siblings. The PCR results indicated that the CMV strain excreted by each infant was indistinguishable from that excreted by the corresponding family member. By contrast, the molecular profiles of the CMV strains were distinct between families, indicating that the PCR algorithm described in this study is a useful method for analyzing CMV strains.

Antigens, Viral↗

Complications common to ventricular assist device support are rare with 90 days of DeBakey VAD support in calves.

The DeBakey VAD is a miniaturized, electromagnetically driven axial flow pump intended for long-term ventricular assist. Safety and performance data from six calves implanted with the complete DeBakey VAD system are reported elsewhere; here we describe complications and necropsy findings for these same six animals, all of which survived 90 days. The study was conducted according to a uniform protocol, which included anticoagulation and antibiotic prophylaxis. Clinical complications tracked included bleeding, cardiovascular abnormalities (e.g., arrhythmias, tachycardia unrelated to pain, bradycardia), hemolysis, hepatic dysfunction, renal dysfunction, thromboembolism (neurologic or peripheral), or infection. Each adverse event was retrospectively categorized with regard to severity (mild, moderate, severe) and relationship to device. Clinical findings were confirmed by necropsy. There was no evidence of systemic infection, thromboembolism, hemolysis, or renal or hepatic dysfunction in these six animals during the study period. A single adverse event was noted in each of two of the calves. Both events were considered mild according to the predefined criteria. Bleeding related to the surgical implantation procedure and requiring reoperation occurred in one animal. The other animal had evidence of a superficial infection at the exit site of the cables on the left lateral thoracic wall; the infection did not extend into the thoracic cavity. Chronic, healed small renal infarct scars were present in several animals. Mild valvular endocardiosis was observed in two calves and mild fibroelastosis was present in the endocardium at the site of the inflow cannula in three calves; however, these lesions were not considered clinically significant. No other gross or histologic abnormalities were noted at necropsy. In conclusion, calves implanted with the complete DeBakey VAD for 90 days demonstrated few complications and had no significant necropsy findings. Complications common to ventricular assist device (VAD) support (i.e., hemolysis, infection, bleeding, thromboembolism) were rare during long-term support (90 days) with the DeBakey VAD.

Animals↗