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Biomedical subjects

Colin Greaves

Publications and source records attributed to Colin Greaves.

5 recordsLinked to original sources

Enhanced oxide ion conductivity in stabilized delta-Bi2O3.

The substitution of Re into Bi2O3 allows stabilization of the delta-Bi2O3 structure by additional substitution of any lanthanide ion to give, for example, phases of composition Bi12.5La1.5ReO24.5. Some of these phases have been found to show exceptionally high oxide ion conductivity at low temperatures, ca 10-3 S cm-1 at 300 degrees C. The phases show a significant structural difference from other delta-Bi2O3 phases previously reported, with interstitial anion sites displaced further from the ideal fluorite position, (1/4,1/4,1/4).

Journal Article↗

Marma therapy for stroke rehabilitation -- a pilot study.

OBJECTIVE: To examine feasibility and acceptability issues and to gather preliminary outcome data to ascertain the numbers needed for a trial of Marma massage therapy for stroke rehabilitation. DESIGN: Pilot non-randomized controlled trial, comparing standard care with standard care plus Marma therapy in post-stroke patients with a nested qualitative study. PARTICIPANTS: Adult patients who had an infarction or haemorrhage at any brain location with a Barthel Index score of 75/100 or less. METHODS: Feasibility was assessed in terms of recruitment and response rates and loss to follow-up, and acceptability was assessed by patient interviews (n=13). The main outcome measure was the Barthel Index. RESULTS: The recruitment rate was 0.53 patients per week in a stroke unit with an admission rate of 15.1 per week, the response rate was 91% and the loss to follow-up 30%. Most patients believed that the massage was beneficial, and although some reported pain, all interviewed would choose it again. The effectiveness data showed no significant differences in changed scores. However, the secondary measure follow-up score differences of the Motricity Index at 6 and 12 weeks and the trunk control test at 6 weeks suggest a possible greater improvement in the intervention group (p<0.05, p<0.01). CONCLUSION: There are grounds for a future trial of Marma therapy (n=172), which would be feasible and acceptable to patients.

Adult↗

Randomised controlled trial of magnetic bracelets for relieving pain in osteoarthritis of the hip and knee.

OBJECTIVE: To determine the effectiveness of commercially available magnetic bracelets for pain control in osteoarthritis of the hip and knee. DESIGN: Randomised, placebo controlled trial with three parallel groups. SETTING: Five rural general practices. PARTICIPANTS: 194 men and women aged 45-80 years with osteoarthritis of the hip or knee. INTERVENTION: Wearing a standard strength static bipolar magnetic bracelet, a weak magnetic bracelet, or a non-magnetic (dummy) bracelet for 12 weeks. MAIN OUTCOME MEASURES: Change in the Western Ontario and McMaster Universities osteoarthritis lower limb pain scale (WOMAC A) after 12 weeks, with the primary comparison between the standard and dummy groups. Secondary outcomes included changes in WOMAC B and C scales and a visual analogue scale for pain. RESULTS: Mean pain scores were reduced more in the standard magnet group than in the dummy group (mean difference 1.3 points, 95% confidence interval 0.05 to 2.55). Self reported blinding status did not affect the results. The scores for secondary outcome measures were consistent with the WOMAC A scores. CONCLUSION: Pain from osteoarthritis of the hip and knee decreases when wearing magnetic bracelets. It is uncertain whether this response is due to specific or non-specific (placebo) effects.

Aged↗

Developing research management and governance capacity in primary care organizations: transferable learning from a qualitative evaluation of UK pilot sites.

BACKGROUND: The capacity and capabilities for undertaking primary care research have increased both within and outside of the UK in recent years. The UK Department of Health aims to facilitate this further by establishing a national network of primary care organizations (PCOs) ready to act as hosts for shared research governance systems. However, it is unclear which models offer the most effective option. In addition, there is confusion over new processes and concern that researchers may be deterred from addressing important questions. OBJECTIVES: The research ascertains how PCOs selected as pilot sites have organized research management and governance (RM&G). METHODS: We adopted a case study approach involving interviews with key informants in a purposive sample of eight pilot PCO (RM&G) sites. RESULTS: Motivating factors for PCOs to host RM&G included the possibility of additional resources and more effective use of research to improve service delivery. A range of organizational models were adopted, often reflecting existing strategic alliances. It is envisaged that it will not be effective or cost-effective for many PCOs to make individual arrangements for RM&G, and so models are already developing among groups of PCOs and partner organizations. The extent of partnerships between PCOs varied with concern over critical mass and dilution of expertise in larger groupings. The development and implementation of systems in pilot sites was facilitated by the support of the wider PCO in recognizing research as a valued and integral part of the organization; the effective management of relationships and the establishment of equal partnership arrangements for RM&G, and the effective use of existing R&D infrastructure and expertise. CONCLUSIONS: RM&G partnerships vary according to local circumstances. It is likely that groupings will develop in the future with increasing co-terminosity and across wider health organization boundaries, such as Strategic Heath Authorities (in the UK) or primary care research networks. Critical mass of RM&G arrangements is likely to be linked to levels of research activity. There are real concerns over the levels of bureaucracy associated with the implementation of research governance; however, those PCOs that develop as RM&G sites have the opportunity to enrich their organizations and expand clinically relevant R&D. Partnership working within PCOs and with primary care research networks, academic departments or acute trusts, may be the key to success. Those undertaking research within primary care settings outside of the UK can learn important lessons from the UK experience and ensure development of high quality research that informs improvements in patient care.

Delivery of Health Care↗