INCIDENTAL DYSPLASIA DURING TOTAL PROCTOCOLECTOMY WITH ILEOANAL POUCH: IS IT ASSOCIATED WITH WORSE OUTCOMES?

Patients with inflammatory bowel disease (IBD) are at increased risk of colorectal cancer. In cases of invisible or non-endoscopically resectable dysplasia found at colonoscopy, total proctocolectomy with ileal pouch anal anastomosis can be offered with good long-term oncological outcomes and pouch survival, however, little is known regarding cancer-related outcomes when dysplasia is found incidentally after surgery. We hypothesized incidental colorectal dysplasia is associated with worse oncologic outcomes compared to dysplasia diagnosed preoperatively.

Leggi
Marzo 2023

DEVELOPMENT OF A NOVEL DRUG DELIVERY SYSTEM (DDS) TO DELIVER DRUGS DIRECTLY TO THE COLONIC MUCOSA TO IMPROVE EFFICACY AND REDUCE SYSTEMIC EXPOSURE FOR THE TREATMENT OF ULCERATIVE COLITIS (UC)

The clinical remission rate in moderate to severe ulcerative colitis (UC) and Crohn’s Disease (CD) has plateaued at ∼15-20% despite the approval of multiple therapeutics. Research has shown that an inadequate amount of drug at the disease site in the colon may be responsible for limited clinical benefit. The Drug Delivery System (DDS) is an ingestible electronic targeted delivery device containing a localization system to autonomously identify colon entry based on gastrointestinal (GI) anatomy, independent of the variable GI physiological conditions deliver a bolus dose of a liquid drug formulation to the colon mucosa to improve efficacy and reduce systemic toxicity.

Leggi
Marzo 2023

Does melatonin administration reduce the incidence of postoperative delirium in adults? Systematic review and meta-analysis

Postoperative delirium (POD) is common. It is associated with increased morbidity and mortality. Many cases may be preventable and melatonin offers promise as a preventative agent.
Objective
This systematic review provides an up-to-date synthesis of the evidence on the effect of melatonin in preventing POD.

Design
A systematic search of randomised controlled trials of melatonin in POD was run across multiple databases (EMBASE, MEDLINE, CINAHL, PsycINFO) and a clinical trials registry (ClinicalTrials.org) (1 January 1990 to 5 April 2022). Studies examining the effects of melatonin on POD incidence in adults are included. Risk of bias was assessed using the Cochrane risk of bias 2 tool.

Outcome measures
The primary outcome is POD incidence. Secondary outcomes are POD duration and length of hospital stay. Data synthesis was undertaken using a random-effects meta-analysis and presented using forest plots. A summary of methodology and outcome measures in included studies is also presented.

Results
Eleven studies, with 1244 patients from a range of surgical specialties were included. Seven studies used melatonin, in variable doses, and four used ramelteon. Eight different diagnostic tools were used to diagnose POD. Time points for assessment also varied. Six studies were assessed as low risk of bias and five as some concern. The combined OR of developing POD in the melatonin groups versus control was 0.41 (95% CI 0.21 to 0.80, p=0.01).

Conclusion
This review found that melatonin may reduce the incidence of POD in adults undergoing surgery. However, included studies displayed inconsistency in their methodology and outcome reporting. Further work to determine the optimum regime for melatonin administration, along with consensus of how best to evaluate results, would be beneficial.

PROSPERO registration number
CRD42021285019.

Leggi
Marzo 2023

Differential effects of diet and physical activity interventions in pregnancy to prevent gestational diabetes mellitus and reduce gestational weight gain by level of maternal adiposity: a protocol for an individual patient data (IPD) meta-analysis of randomised controlled trials

Introduction
Women and their infants are at increased risk of complications if gestational diabetes mellitus (GDM) or excessive gestational weight gain (GWG) occurs in pregnancy. Weight management interventions in pregnancy, consisting of diet and physical activity components are targeted based on maternal body mass index (BMI). However, the relative effectiveness of interventions targeted based on alternative measures of adiposity to BMI is unclear. This individual patient data (IPD) meta-analysis aims to explore whether interventions are more effective at preventing GDM and reducing GWG in women according to their level of adiposity.

Methods
The International Weight Management in Pregnancy Collaborative Network has a living database of IPD from randomised trials of diet and/or physical activity interventions in pregnancy. This IPD meta-analysis will use IPD from trials identified from systematic literature searches up until March 2021, where maternal adiposity measures (eg, waist circumference) were collected prior to 20 weeks’ gestation. A two-stage random effects IPD meta-analysis approach will be taken for each outcome (GDM and GWG) to understand the effect of early pregnancy adiposity measures on the effect of weight management interventions for GDM prevention and GWG reduction. Summary intervention effects with 95% CIs) will be derived along with treatment covariate interactions. Between-study heterogeneity will be summarised by I2 and tau2 statistics. Potential sources of bias will be evaluated, and the nature of any missing data will be explored and appropriate imputation methods adopted.

Ethics and dissemination
Ethics approval is not required. The study is registered on the International Prospective Register of Systematic Reviews (CRD42021282036). Results will be submitted to peer-reviewed journals.

PROSPERO registration number
CRD42021282036.

Leggi
Marzo 2023

Ultrasound-guided Jamshidi needle puncture to reduce radiation exposure during percutaneous pedicle screw placement: study protocol for a randomised controlled trial

Introduction
Percutaneous pedicle screw placement (PPSP) is a minimally invasive procedure highly dependent on fluoroscopic guidance, which results in increased radiation exposure and prolonged operative time. Ultrasound can image the lumbar paravertebral anatomy and the needle trajectory in real time, which may help reduce the use of fluoroscopy and radiation dose in PPSP. We will conduct a parallel randomised controlled trial to mainly investigate the effect of ultrasound guidance in radiation reduction during PPSP.

Methods and analysis
A total of 42 patients will be recruited and randomly assigned to the intervention group and the control group at a 1:1 ratio. In the intervention group, we will use ultrasound in combination with fluoroscopy to guide the insertion of the Jamshidi needles. In the control group, PPSP will be performed under conventional fluoroscopic guidance. The primary outcomes are the cumulative fluoroscopy time (s), radiation dose (mGy) and exposure times of screw placement. The secondary outcomes are insertion time of guidewire, rate of pedicle perforation, rate of facet joint violation, visual analogue scale for back pain, Oswestry Disability Index and complications. The participants, outcome assessors and data analysts will be blinded to allocation.

Ethics and dissemination
The trial was approved by the research ethics committee of Shengjing Hospital, China Medical University. The results will be presented at academic seminars and submitted for publication in peer-reviewed journals.
This study involves human participants and was approved by Research Ethics Committee of Shengjing Hospital, China Medical University reference number:2022PS704K. Participants gave informed consent to participate in the study before taking part.

Trial registration number
ChiCTR2200057131.

Leggi
Marzo 2023

Use of tranexamic acid (TXA) to reduce preterm birth and other adverse obstetrical outcomes among pregnant individuals with placenta previa: a systematic review protocol

Introduction
Placenta previa is a placental implantation pathology where the placenta overlies the internal endocervical os. Placenta previa affects approximately 4 per 1000 pregnancies and increases the risk of antepartum bleeding, emergent preterm labour and emergency caesarean sections. Currently, placenta previa is managed through expectant management. Guidelines primarily revolve around the mode and timing of delivery, in-hospital admissions and surveillance. However, the methods to prolong pregnancy have not proven to be clinically effective. Tranexamic acid (TXA), an antifibrinolytic agent, is effectively used to prevent and treat postpartum haemorrhage as well as menorrhagia, with limited adverse effect, and may prove to be an effective treatment for placenta previa. The objective of this systematic review protocol is to review and synthesise the evidence of TXA use for antepartum haemorrhage in placenta previa.

Methods and analysis
Preliminary searches were conducted on 12 July 2022. We will search MEDLINE, EMBASE, CINAHL, Scopus and the Cochrane Central Register of Controlled Trials. Grey literature resources such as clinical trials registries (ClinicalTrials.gov and the WHO’s International Clinical Trials Registry) and preprint servers (Europe PMC and Open Science Framework) will also be searched. The search terms will comprise of index headings and keyword searches related to TXA and the placenta or antepartum bleeding. Cohort and randomised and non-randomised trials will be considered. The target population is pregnant people, of any age, with placenta previa. The intervention is TXA given in the antepartum period. The main outcome of interest is preterm birth before 37 weeks, however, all perinatal outcomes will be collected. Title and abstract will be screened by two reviewers and any conflict will be discussed and evaluated by a third reviewer. The literature will be summarised in narrative form.

Ethics and dissemination
No ethics approval is required for this protocol. Findings will be disseminated through peer-review publication, lay summaries and conference presentations.

PROSPERO registration number
CRD42022363009).

Leggi
Marzo 2023