Publications by authors named "Helen Li"

Article Synopsis
  • * The study utilizes a generative AI model called Orion to analyze blood samples from 1,050 individuals with non-small cell lung cancer (NSCLC) and matched controls, focusing on orphan non-coding RNAs.
  • * Orion significantly outperforms traditional methods, achieving 94% sensitivity and 87% specificity in cancer detection, and shows over 30% higher sensitivity on validation datasets compared to other approaches.
View Article and Find Full Text PDF

Introduction: Rural general surgery faces a crisis as more surgeons undergo fellowship training and then practice in metropolitan areas, leaving rural Americans with decreasing surgical care. This study aims to identify how hometown rurality affects medical students' current level of knowledge and potential educational gaps within their understanding of the definition, benefits, and challenges of rural general surgery to define the need for enhanced education within medical schools.

Methods: In Spring 2021, 11 Midwestern medical schools participated in an electronic survey.

View Article and Find Full Text PDF

Background: Pediatric trauma disproportionately affects low- and middle-income countries, particularly the pediatric trauma systems, are frequently limited. This study assessed the patterns of pediatric traumatic injuries and treatment at the only free-standing public children's hospital in East Africa as well as the implementation and sustainability of the trauma registry.

Methods: A prospective pediatric trauma registry was established at Shoe4Africa Children's Hospital (S4A) in Eldoret, Kenya.

View Article and Find Full Text PDF
Article Synopsis
  • Alzheimer's disease (AD) affects about 50 million people globally and is marked by memory loss, cognitive decline, and brain features like amyloid beta plaques and phosphorylated Tau proteins.
  • Recent studies suggest that similar histopathological signs of AD can be found in the retina, indicating its potential as a non-invasive diagnostic tool for early detection of the disease.
  • The researchers created a novel retinal organoid model using induced pluripotent stem cells from familial AD patients, revealing that while these organoids are similar in cellular makeup to healthy ones, they show increased levels of amyloid beta and Tau proteins, paving the way for drug testing and biomarker research.
View Article and Find Full Text PDF

Background: One-fifth of the US population lives in rural areas. A record number of rural hospitals have closed, creating increased burdens on regional centers and delays in care. This study aimed to assess medical student perceptions of rural surgery and health care, and to elucidate influential factors for future practice.

View Article and Find Full Text PDF

Introduction: Medical trainees who participate in global rotations demonstrate improved cultural sensitivity, increased involvement in humanitarian efforts, and ability to adapt to limited resources. The global coronavirus pandemic halted global rotations for medical trainees. Domestic rural surgery (DRS) may offer a unique alternative.

View Article and Find Full Text PDF

Background: Gastroschisis is a common birth defect with < 5% mortality in high income countries, but mortality in sub Saharan Africa remains high. We sought to compare gastroschisis management strategies and patient outcomes at tertiary pediatric referral centers in the United States and Kenya.

Methods: This retrospective chart review examined uncomplicated gastroschisis patients treated at Riley Hospital for Children in Indianapolis, USA (n = 110), and Shoe4Africa Children's Hospital in Eldoret, Kenya (n = 75), from 2010 to 2018.

View Article and Find Full Text PDF

There is currently a dearth of accessible whole genome sequencing (WGS) data for individuals residing in the Americas with Sub-Saharan African ancestry. We generated whole genome sequencing data at intermediate (15×) coverage for 2,294 individuals with large amounts of Sub-Saharan African ancestry, predominantly Atlantic African admixed with varying amounts of European and American ancestry. We performed extensive comparisons of variant callers, phasing algorithms, and variant filtration on these data to construct a high quality imputation panel containing data from 2,269 unrelated individuals.

View Article and Find Full Text PDF
Article Synopsis
  • Community health workers (CHWs) play a crucial but under-explored role in enhancing surgical care by assisting with patient linkage to operative and post-operative care, beyond their established role in disease screening.
  • A scoping review of literature from 2000 to 2020 identified 10 relevant studies showing that CHWs improve surgical enrollment, provide vital resources, and monitor post-operative care, helping to address the complex needs of surgical patients.
  • The findings suggest that while current research is limited, CHWs help navigate barriers in surgical care and it highlights the need for well-designed studies to better understand their potential contributions in this area.
View Article and Find Full Text PDF

Introduction: Gender is an important factor in determining access to healthcare resources. Women face additional barriers, especially in low- and middle-income countries. Surgical costs can be devastating, which can exacerbate engendered disparities.

View Article and Find Full Text PDF

A 31-year-old previously healthy, pregnant woman presented with acute, unilateral, painless paracentral vision loss in the left eye. The results of neuroimaging studies were normal. Hypercoagulable workup was negative, and fundus examination showed no retinal emboli and no retinal vascular abnormalities.

View Article and Find Full Text PDF

Background: The present study evaluated the association between blood pressure variability and the risk of hip/vertebral fractures in middle aged and elderly patients.

Methods: This was a retrospective observational study of patients attending family medicine outpatient clinics, recruited from 1st January 2000 to 31st December 2003 and were followed up until 31st December 2019. Standard deviation (SD), root mean square (RMS), coefficient of variation (CV) and a variability score (defined as the number of changes in blood pressure (diastolic and systolic) of 5 mm Hg or more) were used as measures of blood pressure variability.

View Article and Find Full Text PDF

Addressing unmet palliative care needs in high-risk surgical patients in low- and middle-income countries must include innovative approaches to limitations in personnel and culturally acceptable assessment modalities. We assessed the utility of a novel seven-item "Step-1" trigger tool in identifying surgical patients who may benefit from palliative care. All adult patients (≥18 years) on general surgery, neurosurgery, and orthopedic surgery wards were enrolled over a four-month period.

View Article and Find Full Text PDF

Background: Distraction osteogenesis (DO) is a functional tissue engineering approach that applies gradual mechanical traction on the bone tissues after osteotomy to stimulate bone regeneration. However, DO still has disadvantages that limit its clinical use, including long treatment duration.

Methods: Review the current methods of promoting bone formation and consolidation in DO with particular interest on biometal.

View Article and Find Full Text PDF

Motivation: Population-scale sequenced cohorts are foundational resources for genetic analyses, but processing raw reads into analysis-ready cohort-level variants remains challenging.

Results: We introduce an open-source cohort-calling method that uses the highly accurate caller DeepVariant and scalable merging tool GLnexus. Using callset quality metrics based on variant recall and precision in benchmark samples and Mendelian consistency in father-mother-child trios, we optimize the method across a range of cohort sizes, sequencing methods and sequencing depths.

View Article and Find Full Text PDF

A 70-year-old woman presented with acute awareness of decreased color vision in her right eye. Fundus examination and a flash electroretinography (ERG) were both normal. A multifocal ERG (mfERG) however revealed foveal depression, and thinning of inner nuclear layer was noted on macular optical coherence tomography (OCT), and a diagnosis of resolved paracentral acute middle maculopathy was made.

View Article and Find Full Text PDF

Optic nerve sheath fenestration (ONSF) is a well-known, relatively safe, and effective surgical treatment for visual loss related to papilledema. Visual loss following ONSF is uncommon but can occur from direct surgical trauma, ischemic optic neuropathy, orbital or intrasheath hemorrhage, or arterial occlusion. Transient severe (e.

View Article and Find Full Text PDF

A 67-year-old woman presented with acute loss of vision to no light perception (NLP), a right afferent pupillary defect, and anisocoria with a nonreactive and dilated pupil in the right eye. Fundus examination showed pallid optic disc edema and a central retinal artery occlusion (CRAO) in the right eye. A temporal artery biopsy showed giant cell arteritis (GCA).

View Article and Find Full Text PDF

Objectives: The objectives of the study were to 1) describe the implementation of the "Testing is Healthy" campaign in four locations in British Columbia (BC) and 2) report process evaluation indicators for the campaign.

Participants: Young adults ages 20-29 years, the age group with the highest reported rates of chlamydia and gonorrhea in BC.

Settings: Movie theatres located in Langley, Burnaby, Coquitlam and Surrey, which are communities served by the Fraser Health Authority (FHA) in BC.

View Article and Find Full Text PDF

A 50 year-old man on immunosuppressive agents presented with left eye vision loss, periorbital swelling, pain, and ophthalmoplegia. The patient was clinically found to have a central retinal artery and vein occlusion. A CT scan was performed which demonstrated intraorbital fat stranding, however the patient lacked sinus disease.

View Article and Find Full Text PDF