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Computer surveillance of patients at high risk for and with venous thromboembolism.

Venous thromboembolism (VTE), including deep vein thrombosis (DVT) and pulmonary embolism (PE), may be the number one preventable cause of death associated with hospitalization. Numerous evidence-based guidelines for effective VTE prophylaxis therapy exist. However, underuse is common due to the difficulty in integrating VTE risk assessment into routine patient care.

Previous studies utilizing computer decision support to identify high-risk patients report improved use of prophylaxis therapy and reduced VTE. However, those studies did not report the sensitivity, specificity or positive predictive value of their methods to identify patients at high risk.

We report an evaluation of a computerized tool to identify patients at high risk for VTE that found a sensitivity of 98% and positive predictive value of 99%. Another computer program used to detect VTE had a sensitivity of 92%, specificity of 99% and a positive predictive value of 97% to identify DVT and a sensitivity of 100%, specificity of 98% and positive predictive value of 89% to identify PE. These tools were found to provide a dependable method to identify patients at high risk for and with VTE.

Dosing frequency of unfractionated heparin thromboprophylaxis: A meta-analysis.

In medical patients, it is unclear whether thromboprophylaxis with low dose unfractionated heparin (UFH) should be administered twice (bid) or thrice daily (tid).

METHODS: Mixed-treatment comparison meta-analysis of randomized control trials that enrolled hospitalized nonsurgical patients at risk of venous thromboembolism and compared UFH bid, UFH tid, or low molecular weight heparin (LMWH) to each other or to an inactive control and measured deep venous thrombosis (DVT), pulmonary embolism (PE), major bleeding and/or death. A Bayesian framework using a random-effects model was applied.

RESULTS: 16 trials with moderate methodologic quality that enrolled 27,667 patients contributed to this analysis. The relative risk and 95% credible intervals comparing UFH tid to UFH bid for DVT, PE, death and major bleeding were 1.56 (0.64 to 4.33), 1.67 (0.49 to 208.09), 1.17 (0.72 to 1.95) and 0.89 (0.08 to 7.05); respectively. When compared to either dose of UFH, the use of LMWH has an effect similar to UFH on all four outcomes.

CONCLUSIONS: Moderate quality evidence suggests that subcutaneous UFH twice daily and UFH thrice daily do not differ in effect on DVT, PE, major bleeding and mortality. Either of the two dosing regimens of UFH or LMWH appears to be a reasonable strategy for thromboprophylaxis in medical patients. A future randomized trial comparing the two doses of UFH is very unlikely, considering the very large sample size that would be required to demonstrate a significant difference, which, if it exists, is undoubtedly small.

Asthma management failure: a flaw in physicians' behavior or in patients' knowledge?

Objectives. Patient-physician communication and patients' knowledge about asthma are relevant factors that influence health outcomes. The aim of this study was to explore general practitioners' (GPs) behaviors, asthma patients' knowledge requirements, and the relationship between physicians' communicative issues, and failures in patients' knowledge.

Methods. GPs participating in a continuing medical education program on asthma completed an ad hoc survey on communicative style and recruited at least three adult asthma patients to indicate, among 10 options, three aspects of asthma about which they felt less informed.

Results. The survey was completed by 2332 GPs (mean age 54.39 ± 5.93 years) and 7884 patients (mean age 49.59 ± 18.03 years). Several ineffective strategies emerged in the physicians' behaviors: 28.5% of GPs did not encourage patients to express doubts, expectations, or concerns; 39.4% tried to frighten patients concerning disease-related risks; only 25.7% used a written action plan. In addition, 18.6% of GPs were not averse to informing the patient about potential side effects; 16.3% did not try to simplify asthma treatment; approximately 30% considered ease of use when selecting drugs; 18% were not disposed to carry out a partnership with the patient; 36.9% were unlikely to involve the patient in asthma management; and 73% tried to retain control over their patients. Finally, 90.3% of GPs declared they want to be consulted before any treatment change. The three topics on which patients felt less informed were the meaning of asthma control (14% of patients); integration of asthma into daily life (13.3%); and periodic checkups (12.7%). There were significant associations between patients' choices and physicians' answers.

Conclusion. These results demonstrate that in general medicine the recommendations of international guidelines on education, communication, and development of a doctor-patient partnership are still ignored and that patients' educational priorities may differ from those identified by medical specialists and by patients belonging to patients' associations.

Pleural Infection: Changing Bacteriology and Its Implications.

The incidence of pleural infection continues to rise worldwide. Identifying the causative organism(s) is important to guide antimicrobial therapy. The bacteriology of pleural infection is complex and has changed over time. Recent data suggest that the bacterial causes of empyema are significantly different between adult and paediatric patients, between community-acquired and nosocomial empyemas and can vary among geographical regions of the world.

Since the introduction of pneumococcal vaccines, a change has been observed in the distribution of the serotypes of Streptococcus pneumoniae in empyema. These observations have implications on therapy and vaccine strategies. Clinicians need to be aware of the local bacteriology of empyema in order to guide antibiotic treatment.

Disability in COPD and its relationship to clinical and patient-reported outcomes.

Objective: To assess the presence of disability in chronic obstructive pulmonary disease (COPD) patients and its relationships with disease severity, comorbidities, and patient-reported outcomes.

Research design and method: COPD outpatients completed validated questionnaires designed to investigate illness perception, well-being, quality of life, and stress, while physicians collected data concerning disability, dyspnea, and comorbidities (Charlson Index).

Results: Of 164 patients, 37.3% exhibited a degree of disability and 67.7 % of them reported the loss of at least one relevant function in daily life (mean 2.34 ± 2.41). Although disability was associated with disease severity (χ(2) = 8.292; p < 0.016), disability was present to some degree in all disease stages and in 44.9% of patients with moderate COPD. Barthel Index scores were related to MRC scores (r = 0.529; p < 0.001), GOLD stage (r = 0.223; p < 0.006), and Charlson Index (r = 0.163; p < 0.032). Disabled patients had a lower mean FEV(1) value (50.96 ± 20.99 vs. 65.00 ± 23.63; p < 0.001) than self-sufficient patients (p < 0.001). The stepwise regression analysis showed that the MRC score was the most relevant factor in inducing COPD patient disability (F = 56.5; p = 0.001). Compared to self-sufficient patients, disabled patients reported lower levels of well-being and health status, increased levels of distress, and a different illness perception.

Conclusions: Disability can be identified in each disease stage, with dyspnea serving as the most relevant inducing factor. Since disability substantially impacts patient perception of and experience with COPD, its presence must be taken into account during disease management. The cross-sectional nature of the study and the characteristics of the sample size represent a limitation in the possibility to generalize the results.

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