Thoracoscopic oesophageal atresia/tracheo-oesophageal fistula (OA/TOF) repair is associated with a higher stricture rate: a single institution’s experience

PURPOSE

Thoracoscopic OA/TOF repair was first described in 1999. Currently, less than 10% of surgeons routinely employ minimally access surgery. Our primary aim was to review our immediate-, early- and long-term outcomes with this technique compared with the open approach.

METHODS

A retrospective review of all patients undergoing primary OA/TOF (Type C) repair at our institution from 2009 was conducted. Outcome measures included length of surgery, conversion rate from thoracoscopy, early complications such as anastomotic leak and post-operative complications such as anastomotic strictures needing dilatations. Fisher's exact and Kruskal-Wallis tests were used for statistical analysis.

RESULTS

95 patients in total underwent OA/TOF repair during the study period of which 61 (64%) were completed via an open approach. 34 were attempted thoracoscopically of which 11 (33%) were converted. There was only one clinically significant anastomotic leak in our series that took place in the thoracoscopic group. We identified a significantly higher stricture rate in our thoracoscopic cohort (72%) versus open surgery (43%, P < 0.05). However, the median number of dilations (3) performed was not significantly different between the groups. There was one recurrent fistula in the thoracoscopic converted to open group. Our median follow-up was 60 months across the groups.

CONCLUSION

In our experience, the clinically significant leak rate for both open and thoracoscopic repair as well as recurrent fistula is much lower than has been reported in the literature. We do not routinely perform contrast studies and are, thus, reporting clinically significant leaks only. The use of post-operative neck flexion, ventilation and paralysis is likely to be protective towards a leak. Thoracoscopic OA/TOF repair is associated with a higher stricture rate compared with open surgery; however, these strictures respond to a similar number of dilatations and are no more refractory. Larger, multicentre studies may be useful to investigate these finding further.

Quality and effectiveness of osteoporosis treatment decision aids: a systematic review and environmental scan

Decision aids (DAs) are evidence-based tools that support shared decision-making (SDM) implementation in practice; this study aimed to identify existing osteoporosis DAs and assess their quality and efficacy; and to gain feedback from a patient advisory group on findings and implications for further research. We searched multiple bibliographic databases to identify research studies from 2000 to 2019 and undertook an environmental scan (search conducted February 2019, repeated in March 2020). A pair of reviewers, working independently selected studies for inclusion, extracted data, evaluated each trial's risk of bias, and conducted DA quality assessment using the International Patient Decision Aid Standards (IPDAS). Public contributors (patients and caregivers with experience of osteoporosis and fragility fractures) participated in discussion groups to review a sample of DAs, express preferences for a new DA, and discuss plans for development of a new DA. We identified 6 studies, with high or unclear risk of bias. Across included studies, use of an osteoporosis DA was reported to result in reduced decisional conflict compared with baseline, increased SDM, and increased accuracy of patients' perceived fracture risk compared with controls. Eleven DAs were identified, of which none met the full set of IPDAS criteria for certification for minimization of bias. Public contributors expressed preferences for encounter DAs that are individualized to patients' own needs and risk. Using a systematic review and environmental scan, we identified 11 decision aids to inform patient decisions about osteoporosis treatment and 6 studies evaluating their effectiveness. Use of decision aids increased accuracy of risk perception and shared decision-making but the decision aids themselves fail to comprehensively meet international quality standards and patient needs, underpinning the need for new DA development.

PARE0030 PEER SUPPORT OF PATIENT AND PUBLIC INVOLVEMENT AND ENGAGEMENT IN RESEARCH: THE ‘RUG-BUDDY’

Background:

Since 2006, The School of Primary, Community and Social Care, Keele University has a long standing commitment to Patient and Public Involvement and Engagement (PPIE) in research. The School’s Research User Group (RUG) has 133 members in January 2020, compared to 80 members in September 2016. Supporting the practical and emotional needs of a growing number of RUG members to support their long-term involvement is of prime importance.

Arising from Keele’s role as a test bed site for the new UK Public Involvement Standards, a new peer support role (the ‘RUG-Buddy’) was co-produced to facilitate the support of RUG members.

Objectives:

The RUG-Buddy is a peer support and mentoring scheme. More experienced RUG members attend research meetings with less experienced members to provide support and reassurance. The scheme aims to provide:

•A welcoming and friendly environment for RUG members

•Extra support for all RUG members before, during and after research meetings

•Help new RUG members ease into public involvement

•Support with discussions between researchers and RUG members, e.g. avoiding research jargon

••Reassurance to new members - learning from those with greater experience of public involvement

•Someone to talk to and confide in from people who have personal experience of PPIE

•Practical advice on completing payment forms, parking issues, etc.

Methods:

Peer support is provided by a panel of existing RUG members who have substantial experience of PPIE in research. This is anadditionalmethod of supporting the RUG members alongside support provided by the School’s PPIE team. RUG-Buddies will be supported in their role by the PPIE team and provided with an induction and training. RUG-Buddies are offered payment for their time and have their travel expenses reimbursed. The RUG-Buddies scheme will be piloted during an initial 6-month period, after which it will be reviewed, with feedback from RUG-Buddies and RUG members.

Results:

A role description for the RUG-Buddy role has been coproduced by Keele’s PPIE team and its RUG Steering Group (Table 1). A panel of 10 RUG members have been recruited for the RUG-Buddy role and have received an induction and training (e.g. Health and Safety, Information Governance). RUG-Buddies have provided support to and attended research meetings with other RUG members. The RUG-Buddy role will be reviewed in September 2020.

Table 1.

Summary of the RUG-Buddy role description

Qualities of a RUG-BuddyRUG-Buddy responsibilitiesPPIE team responsibilitiesWilling to share personal experienceTo attend up to the first three PPIE meetings of a research projectTo provide a training session for all RUG-BuddiesFriendly and approachableTo introduce new member to RUG members and research teamTo meet RUG-Buddies every two months to provide review/feedback of the roleEnthusiastic and knowledgeable about PPIE in researchTo encourage contribution to the meetingTo have a named PPIE lead for any questions/queries that may ariseBe reliable and punctualTo provide support and respond to RUG members’ questionsTo work alongside RUG-Buddy to meet and greet public members

Conclusion:

The RUG-Buddy is an innovative peer support scheme to support the involvement of patients and the public in research. The support provided by RUG-Buddies offers a different perspective from people with real-life experience of involvement in research. It is anticipated that this additional support will enrich the experience of RUG members and facilitate a more welcoming and conducive environment for active and meaningful public involvement. Furthermore, it has also provided an opportunity for the RUG-Buddies to gain valuable new skills and also give something back to the PPIE team and researchers who have supported their own involvement for many years.

Acknowledgments:

This project is funded by the National Institute for Health Research (NIHR) School for Primary Care Research (project reference 440). Thank you to the Keele Research User Group for all their great work

Disclosure of Interests:

None declared

Unmet needs in ankylosing spondylitis patients receiving tumour necrosis factor inhibitor therapy; results from a large multinational real-world study

Background

Symptoms and comorbidities of ankylosing spondylitis (AS) considerably reduce health-related quality of life (HRQoL) and ability to work. This real-world study assessed rates of tumour necrosis factor inhibitor (TNFi) use and switching, treatment failure, and associations between failing TNFi and HRQoL, work productivity and activity impairment (WPAI).

Methods

AS patients and their treating physicians completed questionnaires capturing patient demographics, clinical status, TNFi treatment history, reasons for switching TNFi, HRQoL and WPAI. Current TNFi was determined as “failing” if, after ≥3 months, physician-rated disease severity had worsened, remained severe, was “unstable/deteriorating”, physicians were dissatisfied with disease control and/or did not consider treatment a “success”.

Results

The analysis included 2866 AS patients from 18 countries. Of 2795 patients with complete treatment data, 916 (32.8%) patients had never received TNFi therapy, 1623 (58.1%) patients were receiving their 1st TNFi and 200 (7.2%) patients had ever received ≥2 TNFi (treatment switch). Primary or secondary lack of efficacy were the commonest reasons for switching, and the mean delay in switching after primary lack of efficacy was 11.1 months. 232 (15.4%) patients on TNFi were currently “failing” who, compared to those with treatment success, reported poorer HRQoL: 5-dimension EuroQoL (EQ-5D-3 L): 0.63 vs. 0.78; Medical Outcomes Study Short-Form Health Survey version 2 (SF-36v2) mental component summary (MCS): 41.8 vs. 46.3; physical component summary (PCS): 40.2 vs. 45.1; impaired work productivity: 46.4% vs. 25.0%; and activity: 44.5% vs. 29.6%; all P < 0.001.

Conclusions

Among AS patients, switching TNFi is uncommon and delayed by nearly 1 year despite primary lack of efficacy. Patients currently failing TNFi experience worse physical function, HRQoL and work productivity.

The multi-disciplinary management of complex congenital and acquired tracheo-oesophageal fistulae

AIM OF THE STUDY

Complex tracheo-oesophageal fistulae (TOF) are rare congenital or acquired conditions in children. We discuss here a multidisciplinary (MDT) approach adopted over the past 5 years.

METHODS

We retrospectively collected data on all patients with recurrent or acquired TOF managed at a single institution. All cases were investigated with neck and thorax CT scan. Other investigations included flexible bronchoscopy and bronchogram (B&B), microlaryngobronchoscopy (MLB) and oesophagoscopy. All cases were subsequently discussed in an MDT meeting on an emergent basis if necessary.

MAIN RESULTS

14 patients were referred during this study period of which half had a congenital aetiology and the other half were acquired. The latter included button battery ingestions (5/7) and iatrogenic injuries during oesophageal atresia (OA) repair. Surgical repair was performed on cardiac bypass in 3/7 cases of recurrent congenital fistulae and all cases of acquired fistulae. Post-operatively, 9/14 (64%) patients suffered complications including anastomotic leak (1), bilateral vocal cord paresis (1), further recurrence (1), and mortality (1). Ten patients continue to receive surgical input encompassing tracheal/oesophageal stents and dilatations.

CONCLUSIONS

MDT approach to complex cases is becoming increasingly common across all specialties and is important in making decisions in these difficult cases. The benefits include shared experience of rare cases and full access to multidisciplinary expertise.

Conflict between Stereo and Perspective in Resolving the Slant of Cyclopean Trapezoids

Cue theory has had a resurgence in recent years as part of modular approaches to vision. Cues often seem to combine according to a weighted linear sum, although interactions may also occur. Conflict studies show that linear perspective and stereo combine to influence slant perception, with perspective weighted surprisingly heavily. We investigated the effect of conflicting linear perspective in reducing stereo slant when perspective is present as a purely cyclopean outline shape, compared with conditions when the shape is also monocularly present.

In experiment 1, random line stereograms were generated with cyclopean trapezoids standing out from a background. Their outline convergence either conflicted with or supported a stereo gradient across the surface of the trapezoid. Two stereo slants and two standing disparities were used. In experiment 2, an aperture condition was included with the cyclopean trapezoids behind the surround. There was strong influence of trapezoid direction on perceived slant. This influence was only marginally increased by outlining the trapezoid. These findings demonstrate the effectiveness of cyclopean shape as perspective information. As expected, when the trapezoid was an area seen through an aperture, its direction did not significantly affect stereo slant. We conclude that stereo and perspective cannot be considered as separate modules. In binocular vision, perspective is conveyed stereoscopically.

When might an operative complication be regarded as acceptable? Part 2: Judicial factors that influence the finding of fault during surgical litigation

In cases where surgeons face litigation over operative misadventure, the result of a trial is uncertain. In order to identify factors in cases of surgical litigation that have influenced the final decision of the courts, we have previously reviewed reported cases where the outcome turned on actions taken by surgeons. We now turn our attention to judicial attitudes to evidence that play a role in the determination of the case.

When might an operative complication be regarded as acceptable? Part 1: Surgical factors that influence courts when finding fault during litigation

In cases where surgeons face litigation over operative misadventure, the result of a trial is uncertain. In order to identify factors in cases of surgical litigation that have influenced the final decision of the courts, we have reviewed recent reported cases, noting both surgical and evidential influences on outcome. Taken together, these reveal that among other influential factors, the acceptability of more than one reasonable operative approach, the court's approach to inappropriate delegation and the uncertainties of expert evidence all play a role in the determination of the case.

An unlikely cause of severe malnutrition in a 3-year-old girl with previous gastroschisis

A 3-year-old girl with previous gastroschisis associated with jejunal and colonic atresia presented with severe oedema, abdominal pain and diarrhoea. Clinically she was malnourished. Serum albumin and concentrations of micronutrients were low. A barium meal examination showed jejunal dilation. A stricture was suspected and the patient was taken to theatre where an 8 cm length of bowel was resected including a jejunal stricture at the point of previous atresia repair. Inside the proximal dilated jejunum was a large trichobezoar (hairball), thought to be acting as a ball valve inside the bowel. This girl made a rapid recovery after surgery. Her nutritional state improved, symptoms resolved and serum biochemistry normalised. She remains well at follow-up with normal blood results, normal albumin and no diarrhoea.

Seeking responsibility for the lost swab? Search elsewhere

This article explores the possibility that the surgeon's control over his or her environment is not complete and that, in certain circumstances, the final swab count can be distinguished from the 'normal course of events'. We readily accept that most swabs and instruments are left inside patients simply as a result of substandard care but we cannot accept that this is invariably the case, and lessons from the common law are cited to illustrate the reasons why. We hope to persuade defendant lawyers that it might be worthwhile to tease out from surgeons under scrutiny how these factors may have influenced their practice on the day that a swab was retained.

Factors influencing the distributions of polyunsaturated terpenoids in the diatom, Rhizosolenia setigera

Polyunsaturated highly branched isoprenoid (HBI) hydrocarbon distributions of laboratory cultures of five strains of the planktonic diatom Rhizosolenia setigera (Brightwell) are shown herein to be highly variable. Some strains produced both haslenes with from three to five double bonds and rhizenes. The haslenes comprised not only Delta5 alkenes but also those with C7(20) unsaturation, including hasla-7(20),9E,Z, 23-trienes and hasla-7(20),9E,Z-13, 23-tetraenes. The rhizenes contained C7(25) unsaturation and the vinyl moiety common to all algal haslenes so far characterised. The effects of temperature and salinity on HBI composition, along with isotopic content, were determined in strain CS 389/A. Increase in growth temperature from 18 to 25 degrees C increased the degree of unsaturation in the haslenes and E to Z isomerisation in the triene. There was also an increase in unsaturation in the rhizenes at the highest growth temperature, with hexaenes dominant over the pentaenes but in the rhizenes, Z to E isomerisation increased. Increased salinity from 15 to 35 psu increased cell growth and rhizene production but decreased haslene production. Unsaturation in haslenes was not changed by increased salinity but unsaturation in the rhizenes decreased. These may reflect growth rate differences. The carbon isotopic compositions of the haslenes and rhizenes were similar to that of the major sterol at 18 degrees C, but the major HBI isomers were 3-4 per mil depleted relative to phytol released by saponification from chlorophyll a. This suggests biosynthesis of HBIs from a different isotopic pool of isopentenyl biphosphate to that from which phytol is biosynthesised. At 25 degrees C, further isotopic differences were observed. The variables controlling HBI distributions in R. setigera are still not fully understood and rationalisation of the environmental controls on the sedimentary distributions of the HBIs from R. setigera may only be possible once such factors are established.