Research Projects
Upcoming

Assessing the Effectiveness of Cerebroplacental Ratio Measurement for Monitoring Post-Dates Pregnancies: A Pilot Study
Funding: Women’s Health Research Institute Catalyst Grant
Principal Investigator: Yasser Sabr
Co-Investigators: Sarka Lisonkova, Michelle Rougerie
PRIME Equipment Used: GE Voluson E10 BT 21
Recruitment Target: 100 participants
Post-dates pregnancies, defined as those that extend beyond 40 weeks of gestation, occur in approximately 10% of all pregnancies. These cases carry increased risks of complications for both the mother and fetus. Current fetal monitoring methods, including non-stress tests (NST) and amniotic fluid index (AFI), may not always provide sufficient information to predict adverse outcomes. The cerebroplacental ratio (CPR), derived from Doppler ultrasound measurements of fetal blood flow, is a promising tool that could enhance the assessment of fetal well-being. This pilot study seeks to evaluate the effectiveness of CPR in predicting adverse outcomes in post-dates pregnancies and determine its utility as a routine monitoring tool in clinical practice.
In Progress

Placenta, FEtal Brain BLood flow, and Substance Use ExposureS (PEBBLES)
Funding: 2023 Perinatal Research Imaging and Evaluation (PRIME) Centre Research Award
Principal Investigator: Charissa Patricelli
Co-Investigators: Tim Oberlander, Amanda Easton, Robert Rohling, Kenneth I. Lim, Jeff Bone, Wendy Robinson
PRIME Equipment Used: GE Voluson E10 BT 21
Recruitment Target: 14 participants
Canada continues to face a growing opioid epidemic, and women and birthing persons are able to access opioid agonist therapy (OAT), such as methadone, buprenorphine, and slow-release oral morphine at higher rates. The goal of this pilot feasibility study is to gather preliminary data to learn more about opioid agonist therapy (OAT) and pregnancy, including a pregnant person’s placenta and baby.
A Pilot Clinic: Early Anatomy Ultrasound for Patients with High BMI (QIQA Project)

Principal Investigator: Chantal Mayer
Co-Investigators: Dr. Chritina Nowik, Sarah Coad
PRIME Equipment Used: GE Voluson E10 BT 21
Recruitment Target: 100 participants
Pregnant people with elevated body mass index (BMI) are at increased risk for fetal anomalies while obesity is also associated with decreased likelihood of completing the routine fetal anatomic details due to limited windows. This can lead to requiring multiple ultrasounds examination to complete anatomical screening, which is time and resource consuming and may lead to significant patient anxiety .While there are currently no additional ultrasound examination resources available at BC Women’s Hospital to offer this service widely, a pilot clinic is proposed. The main objective of the pilot project is to provide this service to a selected population while assessing the feasibility and acceptability of offering early anatomic assessment for these indications at this site.
Optically Tracked 2D Ultrasound System for Guiding Treatment of Developmental Dysplasia of the Hip

Funding: NSERC
Principal Investigator: Antony Hodgson
Co-Investigators: Kexin Katie Chen, Maria Jose Bonta Suarez, Jakub Piwowarczyk, Anthony Cooper, Emily Schaeffer
PRIME Equipment Used: 4D Ultrasonix probe
Recruitment Target: 50 participants
Babies born in the breech position are at higher risk for a condition called Developmental Dysplasia of the Hip (DDH), where the hip joint does not form properly. To catch this early, clinicians use ultrasound imaging. However, the standard 2D ultrasound scans are often unreliable because even small differences in how the probe is held can change diagnostic results. When DDH is not diagnosed and treated early, children can develop serious problems with walking and may eventually require surgery.
While 3D ultrasound systems provide more reliable measurements, they are costly and not widely available. To address this, this study developed a new Tracked Ultrasound System (TUS) that mounts a camera on existing 2D ultrasound probes; TUS allows us to build 3D ultrasound volumes from location-tagged 2D scans. This study will assess the feasibility of TUS in a clinical setting and validate its performance on real patient data. The aim is to develop and validate a more affordable and accessible option for reliable diagnosis, potentially leading to earlier treatment and better outcomes for children with DDH.

RapidOmics 2.0: Long-read genome sequencing for urgent genetic disease diagnosis
Funding: BC Children’s Hospital Foundation, BC Women’s Health Foundation, Genome BC, Genome Canada
Principal Investigators: Jan M. Friedman and Craig Ivany
Co-Investigators: Allison Elliott, Larry Lynd, Steven Jones, William Gibson, Colleen Guimond
PRIME Space Used: Consent room
Recruitment Target: 100 families
This study explores the utility of long-read genome sequencing (rLRS) for diagnosing serious genetic disorders in pregnancies and infants. Recruitment is open with a goal of 100 participants. To compare rLRS with the current standard of rapid short-read trio exome sequencing, focusing on diagnostic accuracy, limitations, and cost-effectiveness to improve patient outcomes.
Completed

Stillbirth Risk Identification Using Multiparametric Ultrasound (STIMULUS)
Funding: STIMULUS is one of a team of global performers who were selected for the Welcome Leap In Utero Program
Principal Investigator: Robert Rohling
Co-Investigators: Farah Deeba, Chantal Mayer, Jefferson Terry, Jennifer Hutcheon, Denise Pugash
PRIME Equipment Used: GE Voluson E10 BT 21
Recruitment Target: 249 participants
Every year, approximately two million babies die in utero. Stillbirths have long-lasting personal and psychological consequences for parents, as well as substantial costs for wider society. Many of these deaths (between 25% and 60%) are classified as unexplained.
STIMULUS aims to reduce stillbirth rates by capturing more detailed ultrasound information from the mother, fetus, and placenta. Researchers will use this information to better understand the quality of fetal and placental tissue and differentiate between healthy pregnancies and pregnancies that may have underlying complications, including stillbirth.
All participants are recruited through the South Community Birth Program and clinics at BC Women’s Hospital. Participants are asked to complete a maximum of three ultrasounds throughout their pregnancy. All ultrasounds take place at the PRIME Centre.

Pilot Project to assess the reliability of transabdominal cervical length measurement to screen for short cervix in a Canadian Cohort
Funding: BCCHR Catalyst Grant
Principal Investigator: Christina Nowik
Co-Investigators: Amanda Easton, Chantal Mayer, Kenneth I. Lim, Jennifer Hutcheon
PRIME Equipment Used:
Recruitment Target: 180 participants (for the second phase of study)
This study comprises of two phases. PRIME Centre was used to complete the first quality assurance phase to ensure inter-rater reliability of cervical assessment.
This study aims to assess the potential to use transabdominal ultrasound to provide standardized, universal cervical length screening. To achieve this, transabdominal cervical length measurement is compared with gold standard endovaginal ultrasound measurement in high-risk patients already booked for endovaginal cervical length assessment. If transabdominal ultrasound demonstrates reasonable sensitivity for short cervix, as assessed by endovaginal ultrasound, the research team can pursue a larger study to establish universal cervical length screening with transabdominal ultrasound, which is more accessible and cost-effective.
SWAVE-2 Project: (Shear Wave Absolute Vibro-Elastography), studying post-delivery placentas in patients with pre-eclampsia and severe fetal growth restriction. (Terminated early without complete data due to Covid-19 risks and restrictions).


Principal Investigator: Robert Rohling
Project Lead: Farah Deeba
Co-Investigators: Ricky Hu, Jefferson Terry, Denise Pugash, Jennifer A Hutcheon, Chantal Mayer, Septimiu Salcudean
PRIME Equipment Used:
STANDARDIZATION and validation of two methods of MEASUREMENT of the fetal cerebral LATERAL VENTRICLES

Principal Investigator: Amanda Easton
Co-Investigators: Ariadna Fernandez, Arianne Albert
PRIME Equipment Used: GE Voluson E10 BT 19
Recruitment Target: 30 participants
Historically, various techniques have been employed to measure fluid spaces in the fetal brain using ultrasound. One method emerged as the gold standard for over two decades until 2009 when Dr. Laurent Guibaud introduced a new approach. Dr. Guibaud’s method, leveraging different anatomical landmarks, proposed that the new method was technically easier and a more accurate way of measuring these fluid spaces. For the new method to use the older method’s normative data values and “normal” cut-off, the new method must be validated. Any significant difference between the measurements of the two methods mandates the creation of a new normative dataset for the new approach.
The objective of this single site pilot study was to estimate the difference in measurements between the two methods and to establish the technical feasibility of the new method. The study found that there was a clinically important difference between the two methods and that the new method can reliably be used after 21 weeks gestation due to the visibility of a specific anatomical landmark in the fetal brain. A study with a larger sample size could yield more reliable results. However, the identified significant difference between the methods is an important consideration when applying a normal cut-off to borderline measurements.