The effects and cost-effectiveness of an empowerment-based self-care programme in patients with chronic heart failure: A study protocol.

AIM: This study aims to evaluate the effects of a 12-week empowerment-based self-care programme on the cognitive, psychological and behavioural aspects of self-care, health-related quality of life and unplanned hospital service use of chronic heart failure patients and to estimate its cost-effectiveness in reducing unplanned service use. STUDY DESIGN: Randomized controlled trial with cost-effectiveness analysis. METHODS: The study will recruit 236 community-dwelling Chinese patients with chronic heart failure from regional hospitals in Hong Kong. Patients will be randomized in blocks to attend either the 12-week empowerment-based self-care programme or a didactic education programme. Central to the empowerment-based model is that the patients are the primary decision makers in self-care and act autonomously to manage the disease. Collaborative approach and interactive teaching strategies are used to optimize patients' engagement and knowledge translation to real-life practice. Outcome evaluation on self-care maintenance and management, symptom perception, self-care confidence, self-care knowledge, health-related quality of life and health service use will take place at baseline, on completion of the programme and at 12 weeks thereafter. Generalized estimating equations and Cox regression examine the intervention effects. Bootstrapping technique will be conducted to examine the cost-effectiveness of the intervention. The study is formally funded in December 2016. DISCUSSION: Chronic heart failure is associated with high level of hospital admissions, of which 40% is avoidable through effective self-care. Although self-care confidence is known to improve self-care, no structured educative method has been developed to enhance this attribute. This study addresses this research gap with a stringent application of theory and research design. IMPACT: The study illustrates the application of the empowerment model for self-care enhancement in patients with chronic heart failure. The findings will inform the ways and values of this care model to enhance the disease management of this expanding clinical cohort.

Comparative study about the tensile strength and yielding mechanism of pacing lead among major manufacturers.

BACKGROUND: With extraction of cardiovascular implantable electronic devices (CIED) increasingly necessitated, various studies have contemplated to investigate clinical predictors for its success and complications. Intrinsic parameters of CIED leads have been studied less extensively and are the foci of this study. METHODS: Three major pacemaker manufacturers accepted invitation. Leads then underwent tensile test in vitro with their composite tensile strength (TS) compared. Mechanism of yielding, under tensile stress, was also observed among them. RESULTS: All pacing leads, participated in this study, surpassed requirement of European Standard EN 45502-2-1. Boston Scientific's FINELINE II STEROX 4456/52 cm (Boston Scientific Corp., St. Paul, MN, USA) and Medtronic's CAPSURE SENSE 4074/52 cm (Medtronic, Minneapolis, MN, USA) showed similar composite TS and both were stronger compared with St. Jude Medical's ISOFLEX OPTIM 1948/52 cm (P <0.001; St. Jude Medical, Sylmar, CA, USA). Despite a difference in the exact site, the Medtronic 4074 and St. Jude Medical 1948 yielded similarly in that their distal tip electrode remained connected with a flimsy inner coil to proximal portion of the lead after their composite TS was exceeded. Boston Scientific 4456's insulation tubing and coil wire broke almost simultaneously and separated completely from the tip electrode when it yielded. CONCLUSIONS: FINELINE II STEROX 4456/52 cm and CAPSURE SENSE 4074/52 cm showed stronger composite tensile strength than ISOFLEX OPTIM 1948/52 cm. FINELINE II STEROX 4456 was found more prone to complete severance. Limitations and precautions to translate these differences directly into real-life scenario are discussed.