Patient Specific Mitral Valve Modeling for Surgical Planning and Training

NCT ID: NCT03609931

Last Updated: 2018-08-01

Basic Information

• Recruitment Status: UNKNOWN
• Total Enrollment: 65 participants
• Study Classification: OBSERVATIONAL
• Study Start Date: 2018-07-31
• Study Completion Date: 2020-01-31

Brief Summary

Mitral valve disease is a common pathologic problem occurring in approximately 2% of the general population but climbing to 10% in those over the age of 75 in Canada[1]. This project has three primary goals all of which will positively affect cardiac patient care.

1) Create patient specific MV models for complex repairs that will allow surgeons the opportunity to practice the repair. 2) Potentially predict the outcomes following minimally invasive repair techniques such as transcatheter treatments (e.g., MitraClip). 3) Provide a model to train individuals on mitral valve repair techniques.

Detailed Description

BACKGROUND Mitral valve disease is a common pathologic problem occurring in approximately 2% of the general population, but climbing to 10% in those over the age of 75 in Canada. Of this group, approximately 20% have a sufficiently severe form of the disease that may require surgical intervention to restore normal valve function and prevent early mortality [4]. Evidence indicates that the surgeon's individual volume of mitral valve repair cases performed is a determinant of not only successful mitral repair rates, but also freedom from reoperation, and patient survival. For patients previously deemed inoperable due to co-morbidities, new techniques to treat mitral valve disease are being developed. However, assessing the optimal approach and the point at which clinical benefit is exceeded by the poor value or futility of the procedure is one of the biggest clinical challenges for physicians.

In the past decade, 3D echocardiography has emerged as a standard of care in diagnostic and interventional imaging for cardiac surgery and cardiology. This, coupled with the emergence of inexpensive 3D printing technology has led researchers and clinicians to explore how improved imaging and additive manufacturing can be used to improve patient outcomes.

In this context, the investigators have completed a proof-of-concept workflow for creating dynamic, patient specific mitral valve models. In concert with a left ventricle simulator 8], these valve models can mimic patient valve pathologies both anatomically and dynamically, as shown in Doppler ultrasound. In a 10 patient retrospective study, the investigators have demonstrated the ability to accurately re-create patient pathology, perform realistic surgical repairs, and assess realistic valve function post repair. The study team's vision is to create a simulator that can be used to assess patient candidacy for percutaneous interventions, assess different repair options for both percutaneous and surgical interventions, and finally use the model as a simulator for competency-based MV interventions.

RATIONALE Based on our successful proof of concept, the goal is to translate this technology to clinical use by validating our valve models. There are two primary long term goals. First, to validate a system for using patient specific MV models to: 1- assess intervention options, and 2: plan repair strategies for improved patient outcomes. Second, by building a database of MV pathologies, create a competency based simulator/trainer to provide surgeons with increased experience in MV repair techniques.

OBJECTIVES

1. Validate the accuracy of patient specific MV pathologies and repairs in a prospective 65 patient study;

2. Optimize our work-flow for creating valve models, in terms of accuracy, manufacture time required, and expense;

3. Validate the accuracy of our patient models for both surgical cases and transcatheter MitraClip interventions;

Conditions

Mitral Valve Prolapse; Mitral Regurgitation; Mitral Valve Disease

Study Design

• Observational Model Type: CASE_ONLY
• Study Time Perspective: PROSPECTIVE

Study Groups

Mitral Valve repair

Patients undergoing mitral valve repair

Mitral Valve Model

Intervention Type: PROCEDURE

Creation of a mitral valve patient specific model to see if it mimics the patients valve

Interventions

Mitral Valve Model

Creation of a mitral valve patient specific model to see if it mimics the patients valve

Intervention Type: PROCEDURE

Eligibility Criteria

Inclusion Criteria

• Patients undergo mitral valve repair with either surgery of MitraClip techniques
• Over 18 years old

Exclusion Criteria

• Unable to place TEE probe
• Refuse consent

• Minimum Eligible Age: 18 Years
• Maximum Eligible Age: 80 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: No

Sponsors

London Health Sciences Centre Research Institute OR Lawson Research Institute of St. Joseph's

OTHER

Sponsor Role: lead

Responsible Party

Daniel Bainbridge

Associate Professor

Responsibility Role: PRINCIPAL_INVESTIGATOR

Central Contacts

Daniel Bainbridge, MD FRCPC

Role: CONTACT

daniel.bainbridge@lhsc.on.ca

5192004235

References

Ginty O, Moore J, Peters T, Bainbridge D. Modeling Patient-Specific Deformable Mitral Valves. J Cardiothorac Vasc Anesth. 2018 Jun;32(3):1368-1373. doi: 10.1053/j.jvca.2017.09.005. Epub 2017 Sep 7.

Reference Type: BACKGROUND

PMID: 29221976 (View on PubMed)

Other Identifiers

111462

Identifier Type: -

Identifier Source: org_study_id