Scan–rescan reproducibility of segmental aortic wall shear stress as assessed by phase-specific segmentation with 4D flow MRI in healthy volunteers

Objective: The aim was to investigate scan–rescan reproducibility and observer variability of segmental aortic 3D systolic wall shear stress (WSS) by phase-specific segmentation with 4D flow MRI in healthy volunteers. Materials and methods: Ten healthy volunteers (age 26.5 ± 2.6 years) underwent aortic 4D flow MRI twice. Maximum 3D systolic WSS (WSSmax) and mean 3D systolic WSS (WSSmean) for five thoracic aortic segments over five systolic cardiac phases by phase-specific segmentations were calculated. Scan–rescan analysis and observer reproducibility analysis were performed. Results: Scan–rescan data showed overall good reproducibility for WSSmean (coefficient of variation, COV 10–15%) with moderate-to-strong intraclass correlation coefficient (ICC 0.63–0.89). The variability in WSSmax was high (COV 16–31%) with moderate-to-good ICC (0.55–0.79) for different aortic segments. Intra- and interobserver reproducibility was good-to-excellent for regional aortic WSSmax (ICC ≥ 0.78; COV ≤ 17%) and strong-to-excellent for WSSmean (ICC ≥ 0.86; COV ≤ 11%). In general, ascending aortic segments showed more WSSmax/WSSmean variability compared to aortic arch or descending aortic segments for scan–rescan, intraobserver and interobserver comparison. Conclusions: Scan–rescan reproducibility was good for WSSmean and moderate for WSSmax for all thoracic aortic segments over multiple systolic phases in healthy volunteers. Intra/interobserver reproducibility for segmental WSS assessment was good-to-excellent. Variability of WSSmax is higher and should be taken into account in case of individual follow-up or in comparative rest–stress studies to avoid misinterpretation

The pharmacists' potential to provide targets for interventions to optimize pharmacotherapy in patients with asthma

<p>Background Despite of pharmacists' specialized knowledge of medication and his/her regular contact with patients, the expertise of the pharmacist may not be used enough yet. Furthermore, the potential of pharmacy dispensing data is underestimated. Objective To provide targets for tailored interventions in asthma patients and to illustrate the potential value of pharmacists in the identification of these targets using individual pharmacy dispensing data. Setting We performed a cross sectional retrospective analysis assessing the quality of asthma patients' pharmacotherapeutic treatment. Method Drug dispensing data from 2008 to 2009 were retrieved from a Dutch pharmacy database. All asthma patients were screened for potential suboptimal pharmacotherapy in 2009. Results were projected to a single community pharmacy to provide an estimate of the number of patients eligible for potential interventions. Main outcome measures (1) frequent use of short-acting beta-agonists without preventive medication, (2) concomitant use of beta-blockers, (3) multiple short courses of oral corticosteroids without using inhaled corticosteroids and 4) use of long-acting beta-agonist without inhaled corticosteroids. Results A total of 8,504 patients were eligible for analysis of the quality of their asthma treatment. 20.9 % of all asthma patients used > 100 DDD short-acting beta-agonists per year, whereas between 21.2 % (a parts per thousand yen400 DDD) and 31.4 % (100-199 DDD) of these patients did not receive preventive medication. Approximately 5.2 % of the asthma patients are using beta-blockers concomitantly and 21.8 % of them received non-cardioselective beta-blockers. 6.3 % of the asthma patients received two or more oral courses of corticosteroids in 2008 and 17.4 % of these patients did not receive inhaled corticosteroids in 2009. 2.9 % of the patients used a long-acting beta-agonists without inhaled corticosteroids. 8.4 % of the asthma patients using both long-acting beta-agonists and inhaled corticosteroids received these drugs in two separate inhalers. We estimated that about 400 asthma patients could be identified in an average pharmacy population (8,000 patients) and 33 (95 % CI 22-44) of these patients would be eligible for interventions. Conclusion This study shows the potential for pharmacists to use their own pharmacy records to identify suboptimal therapy of asthma patients, who may be targets for tailored interventions.</p>

A Randomized Controlled Trial of a Literacy-Sensitive Self-Management Intervention for Chronic Obstructive Pulmonary Disease Patients

BACKGROUND: Low literacy skills are common and associated with a variety of poor health outcomes. This may be particularly important in patients with chronic illnesses such as chronic obstructive pulmonary disease (COPD) that require appropriate inhaler technique to maintain quality of life and avoid exacerbations. OBJECTIVE: To explore the impact of a literacy-sensitive self-management intervention on inhaler technique scores in COPD patients and to determine if effects differ by literacy. DESIGN: Randomized controlled trial. PARTICIPANTS: Ninety-nine patients with COPD. INTERVENTION: Patients were randomly assigned to a one-on-one self-management educational intervention or usual care. The intervention focused on inhaler technique, smoking cessation, and using a COPD action plan. MAIN MEASURES: At baseline, an inhaler technique assessment, literacy assessment, health-related quality of life questionnaires, and pulmonary function tests were completed. Inhaler technique was re-evaluated after two to eight weeks. KEY RESULTS: Mean age 63, 65% female, 69% Caucasian, moderate COPD severity on average, 36% with low literacy, moderately impaired health-related quality of life, and similar baseline metered dose inhaler technique scores. Patients in the intervention group had greater mean improvement from baseline in metered dose inhaler technique score compared to those in the usual care group (difference in mean change 2.1, 95% CI 1.1, 3.0). The patients in the intervention group also had greater mean improvements in metered dose inhaler technique score than those in the usual care group whether they had low health literacy (difference in mean change 2.8, 95% CI 0.6, 4.9) or higher health literacy (1.8, 95% CI 0.7, 2.9). CONCLUSIONS: A literacy-sensitive self-management intervention can lead to improvements in inhaler technique, with benefits for patients with both low and higher health literacy. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (doi:10.1007/s11606-011-1867-6) contains supplementary material, which is available to authorized users