Fish oil supplement use modifies the relationship between dietary oily fish intake and plasma n-3 PUFA levels: an analysis of the UK Biobank.

Observational evidence linking dietary n-3 PUFA intake and health outcomes is limited by a lack of robust validation of dietary intake using blood n-3 PUFA levels and potential confounding by fish oil supplement (FOS) use. We investigated the relationship between oily fish intake, FOS use and plasma n-3 PUFA levels in 121 650 UK Biobank (UKBB) participants. Ordinal logistic regression models, adjusted for clinical and lifestyle factors, were used to quantify the contribution of dietary oily fish intake and FOS use to plasma n-3 PUFA levels (measured by NMR spectroscopy). Oily fish intake and FOS use were reported by 38 % and 31 % of participants, respectively. Increasing oily fish intake was associated with a higher likelihood of FOS use (P < 0·001). Oily fish intake ≥ twice a week was the strongest predictor of high total n-3 PUFA (OR 6·7 (95 % CI 6·3, 7·1)) and DHA levels (6·6 (6·3, 7·1). FOS use was an independent predictor of high plasma n-3 PUFA levels (2·0 (2·0, 2·1)) with a similar OR to that associated with eating oily fish < once a week (1·9 (1·8, 2·0)). FOS use was associated with plasma n-3 PUFA levels that were similar to individuals in the next highest oily fish intake category. In conclusion, FOS use is more common in frequent fish consumers and modifies the relationship between oily fish intake and plasma n-3 PUFA levels in UKBB participants. If unaccounted for, FOS use may confound the relationship between dietary n-3 PUFA intake, blood levels of n-3 PUFAs and health outcomes.

Omega-3 polyunsaturated fatty acids: moving towards precision use for prevention and treatment of colorectal cancer.

Data from experimental studies have demonstrated that marine omega-3 polyunsaturated fatty acids (O3FAs) have anti-inflammatory and anticancer properties. In the last decade, large-scale randomised controlled trials of pharmacological delivery of O3FAs and prospective cohort studies of dietary O3FA intake have continued to investigate the relationship between O3FA intake and colorectal cancer (CRC) risk and mortality. Clinical data suggest that O3FAs have differential anti-CRC activity depending on several host factors (including pretreatment blood O3FA level, ethnicity and systemic inflammatory response) and tumour characteristics (including location in the colorectum, histological phenotype (eg, conventional adenoma or serrated polyp) and molecular features (eg, microsatellite instability, cyclooxygenase expression)). Recent data also highlight the need for further investigation of the effect of O3FAs on the gut microbiota as a possible anti-CRC mechanism, when used either alone or in combination with other anti-CRC therapies. Overall, these data point towards a precision approach to using O3FAs for optimal prevention and treatment of CRC based on mechanistic understanding of host, tumour and gut microbiota factors that predict anticancer activity of O3FAs.

Introduction of an electronic patient record (EPR) improves operation note documentation: the results of a closed loop audit and proposal of a team-based approach to documentation.

An operation note is a medicolegal document. The Royal College of Surgeons (RCS) of England's Good Surgical Practice 2014 (GSP) sets out 19 points an operation note should include. This study aimed to assess if the introduction of an electronic patient record (EPR) improved the quality of general surgical operation notes. An annonymised retrospective case note review of general surgical operation notes was undertaken over five separate time periods. The first cycle consisted of periods 1 (prior to EPR implementation), 2 (1 week after EPR) and 3 (4 weeks after EPR). Period 4 was a reaudit 2 weeks after the initial results were presented at the local governance meeting. The cycle was then closed with period 5; 1 year after EPR implementation. A comparison was across all 5 time periods for compliance with the RCS guidelines and with subanalysis of the individual categories. 250 operation notes were reviewed during five time periods. Compliance improved by almost 19% (p=0.0003) between periods 1 and 5. Eleven of the 19 points (57.9%) over the audit period achieved 100% compliance post-EPR compared to 0% prior. Poor compliance were noted in the categories of antibiotic use, venous thromboembolism prophylaxis and estimated blood loss (noting that these are often documented in the anaesthetic record and/or WHO checklist). EPRs do not guarantee compliance with GSP. We propose that GSP standards need to be updated to reflect the modernisation of medical records and a team-based approach with multimodality input sources would achieve better patient records and patient care.

Optimal management of malignant left-sided large bowel obstruction: do international guidelines agree?

Background: Approximately 20% of patients diagnosed with colorectal cancer will present with left-sided large bowel obstruction. The optimal management of this cohort of patients remains unclear. We aimed to review international guidelines to see if there was a consensus on the treatment of this surgical emergency. Methods: The PubMed and Medline databases were searched for guidelines on the management of left-sided, malignant large bowel obstruction (MBO) between 2010 and 2018. Results: Nineteen guidelines were identified spanning a range of continents. There was no clear consensus on the management of potentially resectable disease. Eight guidelines (42%) suggested primary surgery, two guidelines (11%) suggested stenting as a bridge to surgery and nine guidelines (47%) suggested surgery or stenting could be performed. Primary resection with or without anastomosis was the most frequently recommended procedure (n = 6 35%), but over a third of guidelines gave no operative recommendations. There was very limited detail on the stenting procedure and how long elective surgery should be deferred. In the palliative situation, there was general agreement that stents should be offered in preference to surgery. Conclusion: International guidelines offer limited and contrasting recommendations on the management of left-sided MBO. There is a lack of high-quality evidence to support whether emergency surgery or stenting as a bridge to surgery is the optimal procedure in terms of morbidity, mortality and long-term oncological outcome.