[Shared decision making]. / Shared Decision Making. Gemeinsame Entscheidungsfindung aus Patientenperspektive.

BACKGROUND AND OBJECTIVE: The demand for integration of patients in medical decisions becomes more and more obvious. Little is known about whether patients are willing and ready to share therapeutic decisions. So far information is lacking, whether existing communication skills of both -- patients and physicians -- are sufficient for shared decision making (SDM). This paper presents new data on patients perspectives regarding SDM. METHODS: Standardized survey of 3058 German speaking people (1565 females, 1493 males), aged 18-79 years, a population based random sample of an access panel (pool of german households available for specific surveys) regarding the following topics: medical decision making in practice, communication skills and behaviour of physicians. RESULTS: A majority of patients approved the model of SDM. However, some subgroups of patients, especially older patients, were less interested in the concept of SDM. Necessary communication skills which may help patients to participate in decision making were used rather scarcely. Patients who approved the model of SDM more often experienced a common and trustful exchange of information. CONCLUSION: Most patients favour the concept of SDM. The communication skills necessary for this process are to be promoted and extended. Research on patients' preferences and their participation in health care reform should be intensified. Academic and continuous medical education should focus on knowledge transfer to patients.

[Acute otitis media in children: an evidence-based practice guideline]. / Akute Otitis media (AOM) bei Kindern (ICD: H66.0): eine evidenzbasierte Leitlinie -- Neue Perspektiven für Kinderärzte in Deutschland.

Acute Otitis media is one of the most common acute respiratory infections managed in primary care and the most common infection among in children. Diagnostic criteria, however, do not always correspond to scientific evidence. They often differ depending on individual preferences and competences. Treatment, also, is controversial. In Germany, most children attending their pediatrician or primary care physician will be prescribed antibiotics. Evidence from several randomized studies and systematic reviews suggests that routine usage of antibiotics provides only modest benefit. The benefit of prescribing antibiotics should not only be balanced against the increased likelihood of side effects such as diarrhoea but also against the potential to contribute to longterm antibiotic resistance.

Learning with computerized guidelines in general practice?: A randomized controlled trial.

BACKGROUND: Evidence-based guidelines are seen as an important instrument to transfer scientifically generated knowledge into daily clinical practice and to ensure high standards of clinical care. Despite wide promulgation, clinical guidelines so far have a limited impact on individual professional learning and on changing daily medical practice. OBJECTIVES: Our aims were (i) to study a potential knowledge increase among German GPs after implementation of web- and evidence-based guidelines and (ii) to identify and analyse potential barriers to individual professional learning with computerized guidelines. METHODS: A prospective, randomized controlled trial was conducted including 72 GPs (21% female, 79% male). The intervention group (n = 38) had access to clinical guidelines via the Internet or CD-ROM, the control group had not (n = 34). Both groups received a standardized two-part questionnaire. An increase of knowledge was measured with 25 multiple choice questions related to four different medical topics. In addition, reasons for using or not using computerized guidelines were analysed after access to guidelines was open to all participating physicians. RESULTS: There was no significant knowledge increase in the intervention group (P = 0.69). Twenty-two (58%) GPs of the intervention group had used the guidelines. Unspecified curiosity (76%) and a specific medical question (38%) were predominant motives for usage among physicians who had used the guidelines. Among 'non-users', 78% stated 'lack of time' as the main reason for not using guidelines. CONCLUSION: An efficient knowledge transfer through computerized guidelines was not achieved. Usage, individual learning and potential implementation depend on adequate incentives and pragmatic aspects of clinical practice: easy and quick access.

[Evidence-based guidelines as tools for medical knowledge transfer. The work mode of the Medical Knowledge Network evidence.de]. / Evidenzbasierte Leitlinien als Instrumente des Wissenstransfers in die Praxis. Die Arbeitsweise des medizinischen Wissensnetzwerks evidence.de.

The amount of medical knowledge is growing with increasing speed. Physicians are confronted with more and more--and often useless--information. However, the time lag between the creation of new knowledge and its implementation into daily medical practice is often exceeding a decade. In view of these challenges the knowledge network of the medical faculty of the University Witten/Herdecke is focusing on two different tasks: It provides evidence based medical guidelines in a format that is meant for easy access and use in daily practice. It scientifically explores different ways of presenting and transferring evidence based guidelines in order to develop better and easier ways of implementation. National and international guidelines and studies are screened, evaluated, updated and adapted for its use in the academic network by a team of five university based physicians. In addition, clinical specialists as well as primary care physicians provide expertise for detailed scientific adaptations and for adequate implementation strategies. The implementation process of the guidelines among the faculty based primary care physicians is continuously monitored and evaluated. The main goal of this concept is to create a learning environment for the complex process of medical knowledge transfer.

Diagnostic value of DNA image cytometry in ulcerative colitis.

The increased risk of colorectal cancer in patients with extensive, long-standing ulcerative colitis is well established. The interpretation of dysplasia as the common precursor lesion of colorectal cancer in ulcerative colitis is, however, subject to inter- and intraobserver variation. The histologic diagnosis is particularly difficult in the presence of acute inflammation. Therefore, the analysis of ploidy patterns might be a more objective diagnostic tool. In the present study, the correlation of ploidy and dysplasia of the colonic mucosa was evaluated in the absence and presence of inflammation. Image cytometry was performed on 561 fixed, paraffin-embedded tissue specimens from 67 patients with ulcerative colitis. Twenty patients had long-standing and extensive disease, including eight patients in whom the colitis was associated with colorectal cancer. Dysplasia was only found in patients with long-standing colitis or with colorectal cancer and was significantly more often diagnosed in the case of concomitant inflammation. On the other hand, aneuploid patterns were shown to occur independent of inflammatory activity. Aneuploidy was present in all colorectal carcinomas associated with ulcerative colitis and in 46.2% of specimens with dysplasia. Moreover, aneuploidy was detectable in four of 12 samples with low-grade dysplasia as well as in one case devoid of any dysplastic alteration. Ulcerative colitis patients with low-grade dysplasia plus aneuploidy probably represent a subgroup that might be at higher risk of developing colorectal cancer than patients with low-grade dysplasia alone. All in all, image cytometry analysis might be instrumental in identifying neoplastic lesions even in cases of increased inflammatory activity or regenerative change.

Effects of Escherichia coli hemolysin on endothelial cell function.

Escherichia coli hemolysin is considered an important virulence factor in extraintestinal E. coli infections. The present study demonstrates that cultured pulmonary artery endothelial cells are susceptible to attack by low concentrations of E. coli hemolysin (greater than or equal to 0.05 hemolytic units/ml; greater than or equal to 5 ng/ml). Sublytic amounts of hemolysin increased the permeability of endothelial cell monolayers in a time- and dose-dependent manner. The hydraulic conductivity increased approximately 30-fold and the reflection coefficient for large molecules dropped from 0.71 to less than 0.05, indicating a toxin-induced loss of endothelial barrier function. The alterations of endothelial monolayer permeability were accompanied by cell retraction and interendothelial gap formation. In addition, E. coli hemolysin stimulated prostacyclin synthesis in endothelial cells. This effect was strictly dependent on the presence of extracellular Ca2+ but not of Mg2+. An enhanced passive influx of 45Ca2+ and 3H-sucrose but not of tritiated inulin and dextran was noted in toxin-treated cells, indicating that small transmembrane pores comparable to those detected in rabbit erythrocytes had been generated in endothelial cell membranes. These pores may act as nonphysiologic Ca2+ gates, thereby initiating different Ca2+-dependent cellular processes. We conclude that endothelial cells are highly susceptible to E. coli hemolysin and that two major endothelial cell functions are altered by very low concentrations of hemolysin.