Does the withdrawal time affect adenoma detection in non-screening colonoscopies?

AIMS

There are no studies looking at the relationship between colonoscopy withdrawal time (CWT) and adenoma detection rate (ADR) in non-screening patients. Our aim is to explore the relationship between CWT and ADR, particularly in the proximal colon where colonoscopy is shown to be less protective for the development of cancers.

METHODS

This is a retrospective study during November 2015 to December 2016 of non-screening colonoscopies done at a large teaching hospital. Incomplete and therapeutic procedures were excluded. The 39 endoscopists included were 15 gastroenterologists, 10 colorectal surgeons and 14 trainee colonoscopists. CWT was calculated by reviewing caecal intubation and rectal retroflexion images.

RESULTS

783 colonoscopies were included, with mean patient age of 58.51 years (SD 15.5). The mean ADR was 21.45% in the study. The CWT could be calculated for 62.83% of the cases (n=492). 80% (393) of colonoscopies had CWT of ≥6 min. Mean CWT was 9.15 min (SD 4.4). The ADR positively correlated with longer CWT (r=0.31, p=0.0001). The ADR was significantly higher when CWT was ≥8 min compared with CWT <6 min or CWT of 6-8 min (p=0.0001). More polyps were detected in the proximal colon when CWT ≥8 min (p=0.078). Mean CWT of gastroenterologists was 9.8 min (SD 4.5), similar to the trainee group (10.3 min, SD 3.8), while mean CWT for colorectal surgeons was 5.7 min (SD 3.2). The ADR for gastroenterologists was 25.9% versus 17.5% for colorectal surgeons and 17.8% for trainees.

CONCLUSIONS

There is a moderately strong positive correlation between longer CWT and ADR in non-screening colonoscopies. CWT can differ between different endoscopists. Meticulous colonoscopy withdrawal may improve polyp detection in the proximal colon.

Networked information technologies and patient safety: a protocol for a realist synthesis

BACKGROUND

There is a widespread belief that information technologies will improve diagnosis, treatment and care. Evidence about their effectiveness in health care is, however, mixed. It is not clear why this is the case, given the remarkable advances in hardware and software over the last 20 years. This review focuses on interoperable information technologies, which governments are currently advocating and funding. These link organisations across a health economy, with a view to enabling health and care professionals to coordinate their work with one another and to access patient data wherever it is stored. Given the mixed evidence about information technologies in general, and current policies and funding, there is a need to establish the value of investments in this class of system. The aim of this review is to establish how, why and in what circumstances interoperable systems affect patient safety.

METHODS

A realist synthesis will be undertaken, to understand how and why inter-organisational systems reduce patients' clinical risks, or fail to do so. The review will follow the steps in most published realist syntheses, including (1) clarifying the scope of the review and identifying candidate programme and mid-range theories to evaluate, (2) searching for evidence, (3) appraising primary studies in terms of their rigour and relevance and extracting evidence, (4) synthesising evidence, (5) identifying recommendations, based on assessment of the extent to which findings can be generalised to other settings.

DISCUSSION

The findings of this realist synthesis will shed light on how and why an important class of systems, that span organisations in a health economy, will contribute to changes in patients' clinical risks. We anticipate that the findings will be generalizable, in two ways. First, a refined mid-range theory will contribute to our understanding of the underlying mechanisms that, for a range of information technologies, lead to changes in clinical practices and hence patients' risks (or not). Second, many governments are funding and implementing cross-organisational IT networks. The findings can inform policies on their design and implementation.

SYSTEMATIC REVIEW REGISTRATION

PROSPERO CRD42017073004.

The effects of interoperable information technology networks on patient safety: a realist synthesis

Background

Interoperable networks connect information technology systems of different organisations, allowing professionals in one organisation to access patient data held in another one. Health policy-makers in many countries believe that they will improve the co-ordination of services and, hence, the quality of services and patient safety. To the best of our knowledge, there have not been any previous systematic reviews of the effects of these networks on patient safety.

Objectives

The aim of the study was to establish how, why and in what circumstances interoperable information technology networks improved patient safety, failed to do so or increased safety risks. The objectives of the study were to (1) identify programme theories and prioritise theories to review; (2) search systematically for evidence to test the theories; (3) undertake quality appraisal, and use included texts to support, refine or reject programme theories; (4) synthesise the findings; and (5) disseminate the findings to a range of audiences.

Design

Realist synthesis, including consultation with stakeholders in nominal groups and semistructured interviews.

Settings and participants

Following a stakeholder prioritisation process, several domains were reviewed: older people living at home requiring co-ordinated care, at-risk children living at home and medicines reconciliation services for any patients living at home. The effects of networks on services in health economies were also investigated.

Intervention

An interoperable network that linked at least two organisations, including a maximum of one hospital, in a city or region.

Outcomes

Increase, reduction or no change in patients’ risks, such as a change in the risk of taking an inappropriate medication.

Results

We did not find any detailed accounts of the ways in which interoperable networks are intended to work and improve patient safety. Theory fragments were identified and used to develop programme and mid-range theories. There is good evidence that there are problems with the co-ordination of services in each of the domains studied. The implicit hypothesis about interoperable networks is that they help to solve co-ordination problems, but evidence across the domains showed that professionals found interoperable networks difficult to use. There is insufficient evidence about the effectiveness of interoperable networks to allow us to establish how and why they affect patient safety.

Limitations

The lack of evidence about patient-specific measures of effectiveness meant that we were not able to determine ‘what works’, nor any variations in what works, when interoperable networks are deployed and used by health and social care professionals.

Conclusions

There is a dearth of evidence about the effects of interoperable networks on patient safety. It is not clear if the networks are associated with safer treatment and care, have no effects or increase clinical risks.

Future work

Possible future research includes primary studies of the effectiveness of interoperable networks, of economies of scope and scale and, more generally, on the value of information infrastructures.

Study registration

This study is registered as PROSPERO CRD42017073004.

Funding

This project was funded by the National Institute for Health Research (NIHR) Health Services and Delivery Research programme and will be published in full in Health Services and Delivery Research; Vol. 8, No. 40. See the NIHR Journals Library website for further project information.

How and in what Contexts Does Networked Health IT Improve Patient Safety? Elicitation of Theories from the Literature

Healthcare systems worldwide are investing in networked health IT systems that link healthcare providers across multiple organisations. Much of the policy arguments in favour of such investment rely on the assumption that networked health IT will lead to improved patient safety. As part of the first stage of a realist review to determine how and in what contexts networked, inter-organisational health IT does lead to improved patient safety, we elicited stakeholders' theories from the literature that reveal possible answers to this question. A key mechanism appears to be that the information provided supports improved decision making. Greatest benefits are likely to be found in relation to medication information, in scenarios where the patient is less able to provide accurate information about their medications themselves. However, access and use of this information depends on ease of access, clinicians' perception of the likelihood that the desired information will be available, and clinicians' trust in the information.

Sustainable Information Infrastructures: Insights from a Realist Synthesis

Policy makers and health system managers in many countries are advocating the deployment of inter-operable health information technology systems, spanning organisations in a health economy, believing that they will be clinically effective. The case for investments has not, however, been made to date. This paper presents early results from a systematic review of the effects of inter-operable systems on patient safety. The review uses the realist synthesis method, which focuses on evidence about the decisions and actions that link interventions and outcomes, as well as the evidence about those outcomes. The evidence base is sufficient to identify plausible arguments for investments in inter-operable systems. This said, there is limited empirical evidence about each of the steps in the sequences of events. We comment on implications for the design of sustainable socio-technical solutions. We suggest that current gaps in the evidence base are in areas where informatics field methods can make a valuable contribution to our understanding of the role of inter-operable systems in patient safety.