1. Endotracheal Tube Cuff Valve
Client: Dr. Lester Proctor
Advisor: Paul D. Thompson, Ph.D.
Team V-Tec
Michael Alexander - Team Leader
Claire Edlebeck - BWIG
Samantha Bergh - BSAC
Jack Ho - Communications

2. Outline Problem Statement Background Current Devices
Design Constraints
Design Ideas
Design Matrix
Future Work

3. Problem Statement Endotreacheal Tubes Use in pediatrics Cuff Pressure
Systematic 25cm H2O
Use in pediatrics

4. Background Information
20,000 Operations Annually
25% Children
75% Require Endotracheal Tube
Inflatable Cuff for Adults
Advantages
Tight Seal
Prevents Aspiration
Disadvantages
Ischemia due to excess pressure
Risk Increased in Children

5. With Lanz® Pressure Regulating Valve
Current Devices
Hi-Lo® Tracheal Tube
With Lanz® Pressure Regulating Valve
Pressure maintenance
Monitoring
High-volume, low-pressure
Specialization
Current Devices:
Lanz® valve automatically maintains intracuff pressure to approximately 30cm H2O
Lanz® valve reduces the need for manual cuff pressure monitoring
High-volume low-pressure cuff
Reduces risk of tracheal damage during long-term intubations, especially in children

6. Design Constraints Requirements Performance Safety Shelf Life
Life in Service
Materials
Appearance
Design Constraints:
Cuff cannot fail before reaching 25 cm h2o, must fail at 25 cm h2o
Cuff failure can be bypassed to accommodate unforeseen situations
Must perform at level of current tubes
Must be FDA approved for humans
Must be disposable, but last for duration of patient intubation
Should be able to be stored for one year
Should not increase MRI visibility of tube
Clean, with white finish for high visibility

7. T-Valve
Simple design adding another valve allowing for pressure release.
The added valve will simply be used as a safety valve, releasing excess pressure
Modifications such as a readable gauge can also be applied to this design.
One-way release
Original intake

8. T-Valve: Pros & Cons Pros Cons Extremely simple design
Basic design can be modified in many ways
Modifications
Balloon vs. pressure release valve
Readable gauge
Cons
Not as easy to override compared to other designs
Not easy to manually cause valve to fail if valve sticks

9. T-Valve Modifications
Balloon
Pressure inside
balloon = pressure in cuff
Allows for over inflation
Gauge
Readable gauge with pressure readings
Digital or analog

10. Clip Valve Basic one-piece lever system.
System encloses the pilot balloon
Opens the release valve when the pilot balloon inflates to a certain pressure
Closes when the balloon deflates to normal pressure
Open
Closed
Balloon inflated

11. Clip Valve: Pros & Cons Pros Cons
Can easily be manually overridden both ways
Consistently fails and re-fails
Cons
Relies on pilot balloon
System is not enclosed
Clip could malfunction at 2 different places

12. Clamp Y Additional valve and tube attached to pilot balloon
Standard pressure release valve
Predictably fails at 25cm H2O pressure
Clamp to override
One-way outtake Y
One-way release
greatcare.ec51.com/ product/

13. Clamp: Pros & Cons Pros Cons Consistently fails Ability to override
Relatively inexpensive to manufacture
Can add pressure sensor
Works with any clamp
Cons
Size
Possible clamp failure
Previously mentioned pitfalls

14. Design Matrix Safety (10) Simplicity (5) Ease of Use (5)
Effectiveness (10)
Price (5)
Total (35)
T-Valve 9 5 4 6 29
Clip 7 2 1 21
Clamp 10 3 32

15. Future Plan Discuss design with client
Decide on best design for client requirements
Develop viable manufacturing plan & prototype
Pressure sensor
Pressure release outtake valve
Calibration
Find Manufacturer
Begin prototype testing and refining

16. Any Questions?