Deployment mechanics for catheter-delivered devices
James Wilson · Founder & Principal Engineer · Former Johnson & Johnson MedTech · 10+ years
What I specialize in:
Design-phase finite element analysis focused on the deployment mechanics that determine whether a device behaves the way it should once inside the body. Structural heart, neurovascular, embolization, and interventional devices.
Typical problems I work on:
- Deployment accuracy: predicting where a device lands relative to the intended target and how delivery system design choices change that outcome
- Device-tissue interaction: seating behavior, radial force distribution, conformability, and contact against patient anatomy
- Sheath-frame interaction: friction-driven asymmetries during retraction that produce tilt, drift, or non-uniform expansion
- Crimping and loading: collapse behavior, residual stress states, and pre-deployment conditions that carry through to device performance
- Retrieval and recapture: pulling a deployed or partially deployed device back into a catheter
I work with superelastic nitinol, hyperelastic vessel and tissue materials, and multi-part delivery system assemblies with frictional contact throughout.
Case Studies:
Embolization Coil Deployment and Packing into Saccular Aneurysm
Simulation of sequential embolization coil deployment into a saccular aneurysm, with volumetric packing density analysis
Stent Deployment Mechanics
A finite element study of deployment behavior in a self-expanding nitinol stent, comparing untethered and tethered delivery configurations.
Additional work:
Representative examples of the types of problems I work on:
When clients bring me in:
- A critical design decision must be made, and internal assumptions need an independent technical lens
- Test results reveal behavior that is not fully explained by first-order mechanics
- Performance appears driven by internal interactions, but the dominant contributors are unclear
- Confidence is needed before committing to tooling, supplier decisions, or regulatory pathways
I focus on the problems where the next prototype must be built with intent, not hope.
Let’s talk about your design
A short technical call is usually all it takes to know if I can help:
About James:
James Wilson is a mechanical engineer specialized in computational mechanics applied to medical device design.
After a decade at Johnson & Johnson MedTech working on high-consequence mechanical problems across surgical instruments and robotic-assisted platforms, he founded Wilson MedTech to focus on the mechanics of catheter-delivered devices: how they crimp, how they deploy, where they land, and why they sometimes don't behave the way bench testing predicts.
His core technical ground is large-deformation contact mechanics, superelastic nitinol behavior, and hyperelastic soft tissue materials. He also takes on drug delivery mechanism analysis and surgical instrument mechanics projects where the problem is driven by contact, friction, or material nonlinearity.
James holds multiple patents, has presented technical work to executive-level audiences, and has contributed to the successful launch of several medical devices.