Endotracheal Tube Cuff Valve

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
• Cuff Pressure
• Systematic failure _at_ 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

http//connection.lww.com
5
Current Devices

• Hi-Lo Tracheal Tube
• With Lanz Pressure Regulating Valve
• Pressure maintenance
• Monitoring
• High-volume, low-pressure
• Specialization

6
Design Constraints

• Requirements
• Performance
• Safety
• Shelf Life

• Life in Service
• Materials
• Appearance

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.

8
T-Valve Pros Cons

• Pros
• 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

11
Clip Valve Pros Cons

• Pros
• 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

• Additional valve and tube attached to pilot
  balloon
• Standard pressure release valve
• Predictably fails at 25cm H2O pressure
• Clamp to override

Y
http//greatcare.ec51.com/images/bank/1098801555.j
pg - -0 greatcare.ec51.com/ product/
13
Clamp Pros Cons

• Pros
• 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
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?