Computer-aided characterization of early cancer in Barrett's esophagus on i-scan magnification imaging: a multicenter international study.

BACKGROUND AND AIMS: We aimed to develop a computer-aided characterization system that could support the diagnosis of dysplasia in Barrett's esophagus (BE) on magnification endoscopy. METHODS: Videos were collected in high-definition magnification white-light and virtual chromoendoscopy with i-scan (Pentax Hoya, Japan) imaging in patients with dysplastic and nondysplastic BE (NDBE) from 4 centers. We trained a neural network with a Resnet101 architecture to classify frames as dysplastic or nondysplastic. The network was tested on 3 different scenarios: high-quality still images, all available video frames, and a selected sequence within each video. RESULTS: Fifty-seven patients, each with videos of magnification areas of BE (34 dysplasia, 23 NDBE), were included. Performance was evaluated by a leave-1-patient-out cross-validation method. In all, 60,174 (39,347 dysplasia, 20,827 NDBE) magnification video frames were used to train the network. The testing set included 49,726 i-scan-3/optical enhancement magnification frames. On 350 high-quality still images, the network achieved a sensitivity of 94%, specificity of 86%, and area under the receiver operator curve (AUROC) of 96%. On all 49,726 available video frames, the network achieved a sensitivity of 92%, specificity of 82%, and AUROC of 95%. On a selected sequence of frames per case (total of 11,471 frames), we used an exponentially weighted moving average of classifications on consecutive frames to characterize dysplasia. The network achieved a sensitivity of 92%, specificity of 84%, and AUROC of 96%. The mean assessment speed per frame was 0.0135 seconds (SD ± 0.006). CONCLUSION: Our network can characterize BE dysplasia with high accuracy and speed on high-quality magnification images and sequence of video frames, moving it toward real-time automated diagnosis.

Menstrual cup and risk of IUD expulsion - a systematic review.

BACKGROUND: The menstrual cup is a safe, cost-effective, and environmentally friendly menstrual product which is increasing in usage, especially in younger women. The potential risk for concomitant menstrual cup use to increase IUD expulsion has been raised over the last 10 years, however, few studies assess this. This systematic review aims to identify, appraise and synthesize the current specific evidence on menstrual cup use and risk of partial or total IUD expulsion. METHODS: PubMed, and the Cochrane Library were searched for publications available in English, until February 20th, 2021. Quantitative and qualitative studies, systematic reviews and case series reports were included. Websites of menstrual cup manufacturers LenaCup®, DivaCup®, Lunette®, AllMatters® and Saalt® were searched for warnings relevant to IUD expulsion. RESULTS: Seven studies were included in this review, comprising 73 partial or total IUD expulsion events in patients with IUD contraception using menstrual cups. The case study reports included two individuals who each experienced two and three expulsions respectively. Of the seven publications, three reported expulsion rates of 3.7%, 17.3% and 18.6%. Time to expulsion ranged from less than one week to two and a half years. These three studies disagree on whether there is a statistically significant association between menstrual cup use and IUD expulsion. CONCLUSION: There is a possible association between menstrual cup use and increased risk of IUD expulsion and this information should be shared with patients. However evidence is scarce and high-quality randomised controlled trials are needed to address this risk and the impact of factors such as age, menstrual cup removal technique, pelvic anatomy, IUD type, and measures such as cutting the IUD strings short or delaying menstrual cup use for a period post-insertion. This research gap is limiting patients' ability to make informed choices regarding intrauterine contraception and menstrual management and must urgently be addressed in the context of rising IUD and menstrual cup use, particularly among a younger demographic who are seeking highly effective contraception.

From referral to discharge: Young people and parents' experience of a systemic paediatric psychology service.

OBJECTIVES: The paediatric and adolescent clinical psychology service at the University College London Hospital provides age-appropriate services to young people up to 19 years of age under the care of a hospital consultant. This short report describes how young people and parents experience what we provide as a systemic paediatric psychology team from referral to discharge. METHOD: A semi-structured questionnaire was designed to gather service user perspectives on the systemic clinical psychology service. The questionnaire included open and closed questions to generate qualitative and quantitative data about the different stages of the treatment process. RESULTS: A total of 44/79 families discharged in the previous year were contacted by phone. The majority of young people and parents were happy being called to discuss the referral before being offered an appointment and liked the way in which the psychologist worked with the family. The majority of young people and parents reported their situation had improved as a result of the work offered by the psychology team. Negative aspects of the experience reflected the realities of service driven constraints including having to travel a long distance for the appointment, lack of rooms and having to be discharged at 19 years of age. CONCLUSION: Service user feedback is imperative to providing a high standard of care. This study highlighted positive experiences of a systemic service and indicated areas for future improvement that we are attempting to address.