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Background: Study feasibility and deliverability can benefit from involving patients and carers in the research process, known as patient and public involvement (PPI). There is less evidence on the experiences of patients and carers themselves and we require more information across a range of studies, health conditions and research stages. Aims: This study explored how patients and carers in eight diagnostic research specialties have been involved in research, their motivations and the impact involvement had on them. Method: 143 patients and carers across the Clinical Research Network (CRN) responded to an online semi-structured questionnaire (developed using participatory methodology). Quantitative and qualitative data were analysed. Results: A range of benefits were reported, including providing a life focus and an improved relationship with illness. Less positive experiences regarding time and money and lack of acknowledgement were also reported, along with suggestions for improvement. Conclusions: PPI confers many benefits on patients and carers which could increase PPI recruitment if made explicit. More involvement in study recruitment and dissemination would increase the effectiveness of PPI input. Involving a more varied socioeconomic demographic and at an earlier stage is vital. Financial support for lower earners and greater feedback following involvement should also be explored.

Summary Background Over the past 30 years the pulmonary artery catheter (PAC) has become a widely used haemodynamic monitoring device in the management of critically ill patients, though doubts exist about its safety. Our aim was, therefore, to ascertain whether hospital mortality is reduced in critically ill patients when they are managed with a PAC. Methods We did a randomised controlled trial to which we enrolled 1041 patients from 65 UK intensive care units. We assigned individuals to management with (n=519) or without (n=522) a PAC. The timing of insertion and subsequent clinical management were at the discretion of the treating clinician. Intensive care units decided a priori to have the option of using an alternative cardiac output-monitoring device in control patients. Findings 1014 patients were eligible for analysis. We noted no difference in hospital mortality between patients managed with or without a PAC (68% [346 of 506] vs 66% [333 of 507], p=0·39; adjusted hazard ratio 1·09, 95% CI 0·94–1·27). We noted complications associated with insertion of a PAC in 46 of 486 individuals in whom the device was placed, none of which was fatal. Interpretation Our findings indicate no clear evidence of benefit or harm by managing critically ill patients with a PAC. Efficacy studies are needed to ascertain whether management protocols involving PAC use can result in improved outcomes in specific groups if these devices are not to become a redundant technology.

The objective of this study was to conduct an economic evaluation to identify any differences in the expected costs and outcomes between patients treated with pulmonary artery catheters (PACs) and those without, in order to better inform healthcare decision makers.The evaluation was carried out alongside a clinical trial investigating the use of PACs in intensive care units (ICUs) in the UK. It was conducted from the perspective of the UK NHS, in which PACs are an established intervention. Treating patients without using a PAC was characterised as the new intervention. The primary outcome measure was QALYs. The secondary outcome measure was hospital mortality. NHS costs per patient were calculated for the financial year 2002/03. The bootstrap method was used to characterise the uncertainty of the results and to construct cost-effectiveness acceptability curves.The cost per QALY and per life gained from the withdrawal of PACs were Pounds 2892 and Pounds 21,164, respectively.The results of this study indicate that withdrawal of PACs from routine clinical use in ICUs within the NHS would be considered cost effective in the current decision-making climate.