Penetration and distribution of three lipophilic probes in vitro in human skin focusing on the hair follicle.

Fluorescent model substances of increasing lipophilicity (Oregon Green) 488, Bodipy, FL C5 and Bodipy 564/570 C5) were selected to enable the visualization in the skin using confocal laser scanning microscopy. After measuring the penetration for 18 h, the nonfixed human scalp skin was imaged from the bottom parallel to the stratum corneum and in a cross-section view perpendicular to the skin surface. The images were evaluated by calculating relative accumulation values for different penetrants. The studies indicate that the penetrated amount is highest for Bodipy FL C5 (medium lipophilicity) and lowest for Bodipy 564/570 C5 (high lipophilicity) whereas Bodipy 564/570 C5 (high lipophilicity) reveals the highest relative accumulation in parts of the hair follicle compared to Oregon Green 488 (low lipophilicity). The addition of 30% (v/v) ethanol to the donor phase of substance with a low lipophilicity increases the follicular delivery. From our results we conclude that delivery to the hair follicle can be improved by increasing the drugs lipophilicity and optimizing the composition of the donor phase. However, no conclusion can be drawn about the actual route of transport to the hair follicle.     

A PC-based free text retrieval system for health care providers

The purpose of this paper is to describe the design and development of the Clinical Practice Library of Medicine (CPLM). CPLM is an investigational project aimed at providing health care practitioners with critical in-depth information similar to that obtained from a medical reference library or consultant. When used in conjunction with the physician's knowledge, CPLM can provide valuable diagnostic prompting information to assist in rapidly reaching a suitable diagnosis for timely administration of appropriate treatment. This system may also be used to assist paramedical professionals working in remote areas where other expert medical assistance may not be available.     

Predictors of self-reported problems of confusion among the aged.

Responses to questions on the 1984 Supplement on Aging to the National Health Interview Survey (NHIS) about the experience of personal confusion revealed that two-thirds of those interviewed reported never having an episode of confusion during the preceding year. Of those who reported episodes, fewer than one in five said they were happening with increased frequency. The many meanings of confusion found in the literature prompted a modest local study of what respondents understood by the term when asked the NHIS questions. Of those who admitted occasional confusion, almost two-thirds gave definitions that included memory loss or forgetfulness. Consequently, increased frequency of memory problems and difficulty in remembering were included with other variables in the analyses to identify significant predictors. They emerged the single best predictors of how often a respondent reported getting confused. Others were change in health status, number of functional limitations, educational attainment, and vision problems.     

Shopping in the Healthcare Information Systems Market—A Search for Well-Camouflaged Land Mines

The selection of a healthcare information system is analogous to a big game hunt. The buyers perceive themselves as the hunters while the truth is just the opposite. To strip away the carefully crafted facade of corporate marketing is an art form and requires due diligence on the part of the shopper. Suggestions are offered to the consumer on how to pierce the shell of corporate silence and find the facts that will make a significant difference in product selection. The objectives on the seller's side are to make as much profit as possible and give as little as required to make the sale. The buyer is looking for the best product, the best company, and the most painless installation. The ground between these two vastly different goals is the battlefield of healthcare computer procurement. May the best shopper win! Caveat emptor.     

Sexual assault tracking study: who gets lost to follow-up?

OBJECTIVES: To determine whether loss to follow-up can be predicted in patients who present to an emergency sexual assault assessment service and to generate hypotheses regarding the prediction of loss to follow-up on the basis of patient characteristics, assault characteristics and the services provided. DESIGN: Prospective, exploratory study. SETTING: Emergency department functioning as a regional sexual assault centre in a tertiary care hospital. PATIENTS: All 294 women over the age of 16 years who presented to the emergency department with a complaint of sexual assault and consented to be followed up. INTERVENTIONS: Telephone interviews at 24 to 48 hours and 1 month after presentation; face-to-face interviews after 1 week, 3 months and 6 months. MAIN OUTCOME MEASURES: Follow-up status (tracked versus lost to follow-up), State-Trait Anxiety Inventory (STAI-Y), Beck Depression Scale (Beck) and Rape Trauma Symptom Rating Scale (RTSRS). RESULTS: At 24 to 48 hours 136 (46%) of the patients could not be reached. Only 61 (21%) were still tracked at 6 months. Loss to follow-up at 1 month accurately predicted loss to follow-up at 6 months in 209 (98%) of 214 patients. For tracked patients the STAI-Y and Beck scores improved over 6 months. These scores at 1 week did not predict follow-up status at 6 months, but the numbers were small. Subjects with a higher RTSRS score at 24 to 48 hours were most likely to remain tracked throughout the 6 months. CONCLUSIONS: Decisions regarding how vigorously to track patients with a complaint of sexual assault can tentatively be based on the characteristics of the victim and of the assault. We hypothesize that the characteristics predicting loss to follow-up include denial and avoidance behaviour, lack of a telephone number or forwarding address, history of a psychiatric condition, a disability (e.g., deafness), characterization as a "street person," a high degree of violence or injury in the assault, and threat by the assailant. Although a predictive model requires further data, crisis intervention services in an emergency department are essential, given the large number of patients lost to follow-up.     

Cost analysis of a Laboratory Information System (LIS)

The cost of building, installing, and maintaining a full hospital laboratory communication system is expensive. Using an outside accountant, our books were audited to determine the expenses in each of our major cost centers. These data are tabulated along with services provided. Although the initial expenditures are high, the actual cost per test for full service capability is somewhere between 13 and 17 cents. If viewed as a cost per patient day, the price ranges between 59 and 85 cents.