RESUMEN

Increasing a ceiling fan's speed from its lowest setting of 61 rpm, which resulted in 0.77 m3/s of airflow, to its highest setting of 176 rpm, which resulted in 2.5 m3/s of airflow, or having the fan blow either upward or downward had no statistically significant effect on the efficacy of upper-room ultraviolet germicidal irradiation (UVGI). This outcome suggests that air circulation due to the ceiling fan was sufficient and that any additional increase would not improve efficacy. Numerous experimental studies on upper-room UVGI in which fans were used to provide air mixing have been published. However, none have quantified the air movement produced by these fans or described their tests in sufficient detail to allow results to be compared to predictions using computational fluid dynamics (CFD). The present work provides the required information. In addition to the usual boundary conditions needed for CFD, we made experimental measurements of UV susceptibility of the microorganisms used in the upper-room UVGI tests. We measured UV susceptibilities for Mycobacterium parafortuitum and Bacillus atrophaeus spores to be 0.074 and 0.018 m2/J, respectively. In a previous publication, we reported the spatial distribution of fluence rate, which is also needed for predicting efficacy from CFD. In a companion paper referred to as Part II, upper-room UVGI efficacy was predicted by both Eulerian and Lagrangian CFD and compared to the experimental results from the present study.

Asunto(s)

Asunto(s)

Asunto(s)

RESUMEN

The objective of this survey was to demonstrate whether a primary care track internal medicine residency program emphasizing community-based health care of the urban sick poor trains physicians who will continue to practice in general internal medicine or similar fields. Thirty-five primary care residents (100% of graduates) who trained from 1976 through 1993 in the Adult Primary Care Track of the Internal Medicine Residency Program at St. Vincent's Hospital, New York were used as participants.

Asunto(s)

Asunto(s)

RESUMEN

Directly observed therapy (DOT) to enable completion of antituberculous therapy works. DOT is largely responsible for the recent improvement in tuberculosis case rates in New York City. Despite this favorable trend, the factors of significant HIV disease rates and of multidrug resistant forms of tuberculosis bacteria in the population are of grave concern. Therefore, in addition to DOT other means of preventing tuberculosis spread should be encouraged. These include directly observed preventive therapy (DOPT) programs, use of masks, improved ventilation in crowded settings such as homeless shelters, and ultraviolet light germicidal irradiation of upper room air in such locations.

Asunto(s)

Asunto(s)

RESUMEN

We studied alcohol use and abuse in 103 frail, homebound elderly individuals cared for in a long-term home health care program from July 1991 to February 1992. Their average age was 80.63 years. Eighty-four percent were abstinent at the time of the study, including 25 (25%) past heavy drinkers. Two persons were current heavy drinkers and 14 continued to drink socially. Previous alcohol use or abuse was associated with a history of smoking, cardiovascular morbidity, social isolation, and anxiety or agitation. Current social drinking was associated with sedative-hypnotic use as well as smoking. Twenty-three of 25 past heavy drinkers remained sober on our programs without the use of formal alcohol treatment. Abstinence is known to increase with age, appears to be fostered by the homebound setting, is feasible for homebound elderly persons and is often accepted.

Asunto(s)

Asunto(s)

RESUMEN

BACKGROUND: Engaging older persons in consideration of use of life-sustaining measures, such as cardiopulmonary resuscitation, tube feeding, and urgent intubation, is widely recommended, yet uncommon. METHODS: We studied the short-term impact of a physician-initiated discussion, geared toward guiding informed decision-making, with 20 frail elderly homebound patients. A battery of psychologic rating scales was administered in a pre-post design. Eighteen subjects completed the protocol. Fifteen of the mentally capable surviving subjects were reinterviewed 18 months following the initial discussion to evaluate durability of their decisions. RESULTS: Most welcomed the discussion and clear choices regarding future care usually emerged. Depression rating scales decreased slightly for the entire sample. For the subgroup having relatively internal locus of control, there was an increase in life satisfaction scores. No patient demonstrated signs of emotional trauma consequent to the discussion. On follow-up, several patients were indecisive about their choices. CONCLUSION: Involvement of these patients in decision-making appeared to have no adverse effects, and, for some, it was therapeutic, possibly through enhancement of personal control. Durability of their decisions was not a consistent finding, however.

Asunto(s)

RESUMEN

A large proportion of hospital stays stem from rapid readmission of elderly patients. These patients represent high cost users of inpatient care. Intervention in the hospital admission-readmission cycle may serve the interests of patients and payors alike. Data collected through comprehensive geriatric assessment can be useful in identifying those patients at high risk of readmission and who might benefit from more intensive in-hospital or post hospital attention. However, risk factors for readmission are largely unknown. We conducted a prospective study of elderly patients admitted to a metropolitan teaching hospital medical service and assessed by a geriatric team, to increase our knowledge of the factors associated with hospital readmissions. The most powerful predictor of hospital readmission within 6 months proved to be prior hospitalization. Attempts to reduce rehospitalizations in elderly patients must focus on those with prior recent hospitalizations.

Asunto(s)

RESUMEN

The human immunodeficiency virus (HIV) seroprevalence among a selected sample of 169 high-risk homeless men residing in a congregate shelter in New York City, NY, was 62%. Seropositivity for HIV correlated significantly with intravenous drug use (odds ratio, 3.3; 95% confidence interval, 1.4 to 4.4) and active tuberculosis (odds ratio, 7.0; 95% confidence interval, 3.4 to 13.5). Most cases of active tuberculosis were among homeless men with acquired immunodeficiency syndrome (AIDS) or AIDS-related complex; and significant CD4 lymphocyte depletion was associated with active tuberculosis. Total time homeless correlated positively with active and latent tuberculosis infection. Compliance rates with return for HIV antibody test results, medications, and follow-up visits were 70%, suggesting a significant degree of knowledge, awareness, and personal concern regarding HIV infection among homeless men; yet 28% of homeless intravenous drug users continue active drug injection, despite HIV infection. Cohabitation in overcrowded congregate dormitories creates a risk of airborne transmission of tuberculosis, which is a common reactivation infection in HIV-seropositive homeless men. Medically appropriate housing should be provided to such homeless persons, and expanded HIV antibody testing, counseling, and medical services on site should be offered to residents of shelters.

Asunto(s)

Asunto(s)

RESUMEN

The objective of this study was to determine the prevalence of tuberculous infection and the incidence of active tuberculosis in homeless men attending a shelter-based clinic and to examine risk factors for acquisition of infection and development of active disease. The design was a prospective cross-sectional survey. Men were evaluated by standardized interviews using a questionnaire. Where indicated, skin testing with PPD, collection of sputum for smear and culture for acid-fast bacilli, and chest x-ray films were performed. The setting was an on-site clinic at a men's shelter in New York City. The patients were men attending the clinic for physical examinations for the work program or requesting evaluation of various medical problems. A total of 1,853 men were evaluated over a 73-month period. The overall rate of infection was 42.8 percent, including 27.0 percent with a positive PPD test, 9.8 percent with a history of a positive PPD test, and 6.0 percent with active tuberculosis. Increasing age, length of stay in the shelter system, black race, and intravenous drug use were found to be independently associated with tuberculous infection. Age, length of stay in the shelter system, and intravenous drug use were independently associated with active tuberculosis. We achieved a compliance rate of 36 percent completing treatment and 13 percent receiving treatment at the conclusion of the study.

Asunto(s)

RESUMEN

Considerable evidence indicates that intravenous drug users are emerging as the group at greatest risk for both acquiring and spreading human immunodeficiency virus (HIV) infection. Thus, all possible methods to control the spread of HIV infection in intravenous drug users should be explored. Key recommendations are that HIV antibody testing of intravenous drug users should be voluntary, because mandatory testing is counterproductive; free distribution of needles and syringes to intravenous drug users should occur only in carefully controlled circumstances to determine its effectiveness in decreasing infection rates; and drug-free and methadone maintenance treatment programs should be available on demand to all intravenous drug users as a means of reducing the spread of HIV infection. At present, the primary strategy for prevention must be education resulting in behavioral change. Education is currently the only definitive means for controlling the spread of HIV infection among intravenous drug users, their sex contacts, and to fetuses.

Asunto(s)

RESUMEN

St. Vincent's Hospital and Medical Center of New York has been caring for homebound frail elderly persons since 1973 through a comprehensive network of professional, paraprofessional, and community services that allows many older persons to remain in their homes and communities and avoid institutionalization. The staff consists of physician-nurse-social worker teams that bring to each patient their individual skills as professional practitioners. In addition, working together, they create and attempt to carry out a complete, flexible plan of care. The Chelsea-Village Program (CVP) is open to all persons who the team believes are capable of being maintained independently or who can obtain the necessary additional support of family, friends, or neighbors. The patients, whose average age is 83, are homebound due to orthopedic disorders, arthritis, stroke, chronic cardiac and pulmonary disease, or generalized debility and weakness. St. Vincent's and donations from foundations and individuals fund the program, which is free of charge to its patients. In 1988 about 10 physicians, some in private practice, participated during a typical month; subspecialists have made themselves available; and resident physicians share in the work. The staff has come to understand that human beings are most fulfilled when they are able to use their personal resources in independence and that they must ask the patients for their own definitions of life's goals and serve them as they seek those goals.

Asunto(s)

Asunto(s)

RESUMEN

Health care is generally unavailable for the homeless. This heterogeneous group of men and women, including long-term street dwellers, residents of shelters, the chronically mentally ill, the economically debased, and alienated youth, are subject to a broad range of acute and chronic diseases, intensified by unsuitable living conditions, stress, and sociopathic behavior. Trauma, pulmonary tuberculosis, infestations, and peripheral vascular disease are common problems among the homeless; incomplete and fragmentary medical care permits exacerbation of chronic disorders. Outreach programs imaginatively constructed by teams of physicians, nurses, and social workers can effectively reestablish and maintain health services for these disenfranchised persons.

Asunto(s)

Asunto(s)