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DATE:
INSTITUTE:
COURSE:
SKILLS:
Fall 2025
Duke University Pratt School of Engineering
Advanced Design & Manufacturing
• Design for Manufacturing
• 3D CAD Modeling (Autodesk Fusion)
• Rendering (KeyShot)
• Finite Element Analysis
• Draft Analysis
Redesigned Cystoscope:
This project reimagines the rigid cystoscope, balancing functional performance, usability, and manufacturability. The resulting design prioritizes clinician ergonomics and patient comfort through an intuitive grip and a refined, purposeful form.
PART I: Photon Engine
The photon engine module is housed within the cystoscope and integrates the light source, camera, and laser.
2D Technical Sketch
2D Technical Drawing
Rendering
PART II: Cystoscope
Background:
A cystoscopy is a common medical procedure used to diagnose and treat conditions of the urinary tract. During the procedure, a rigid cystoscope is inserted through the urethra into the bladder while the patient is awake. Many existing rigid cystoscopes rely on outdated form factors that are difficult for clinicians to operate and offer limited consideration for patient comfort.
Redesign:
The goal of this project was to redesign the cystoscope to improve patient comfort and clinician usability. This was achieved through visual exploration, iterative sketching, and modeling clay, eventually leading to the development of a detailed 3D CAD model informed by DFM considerations.
Mood board for a patient-friendly medical device
Final Cystoscope Sketch
3D CAD Model
Integrated side buttons for one-handed valve actuation
Streamlined, minimal form optimized for handling and control
Contoured, ergonomic grip
Front
Side
Back
Internal Components:
Luer locks (inlet/outlet tubing for water flow)
3-pole electrical power connection
Mechanism to secure sheath
Mechanism to secure photon engine
Buttons integrated into body (flow valve control mechanism)
Assembly method:
Cantilever snap-fits (front and back)
Annular snap-fits (top and bottom)
Material:
PC/ABS blend (medical-grade)
Silicone (decorative curve, added separately)
Interactive 3D Model
Analysis:
Draft Analysis:
Evaluated a 3-degree draft angle to ensure components are injection moldable.
Finite Element Analysis:
A 20 N structural load was applied at tip of sheath (stainless steel) to represent gentle probing forces encountered during urethral navigation in cystoscopy.
Final Renderings
GALLERY
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