Heated Pulse-Lavage

1
Heated Pulse-Lavage
Bioengineering Senior Design Department of
Bioengineering University of Pittsburgh February
25, 2005

• Justin S. Miller, Joe McFerron, and Ashley
  Danicic
• Dr. Dinakar Golla, M.D
• Linda Huckenstein, R.N

2
Background

• Lavages are most commonly used to remove debris
  from an organ or cavity via repeated pulsing
  injections of a sterile solution
• Heating the solution would
• Increase circulation to the area
• Reduce the risk of infection
• Increase the comfort of the patient

3
Review of Design

• Problem A cheaper, simpler solution to providing
  heated saline during lavage
• Avoid use of an additional reservoir
• Solution Eliminate external pumps/heaters by
  applying heat directly to saline bag

4
Overview

• Methods
• Criteria for success
• Group Achievements since last meeting
• Personal Achievements to date
• Updated time table

5
Methods Review

• Heating bodies compared
• Heat Exchanger
• Too big
• Too expensive (1,000-2,000)
• Constant flow via pump
• Microwave
• No temperature Control
• PVC IV Bag deforms at 135-180 degrees F
• Constant need for reheating
• Etched Foil Heater
• Thin
• Flexible
• Integral Thermometer

6
Criteria for success

• Ability to heat to specific temperature
• Remains securely on bag
• Easy to use/operate
• Heating element is small, portable, and flexible

7
Group Achievements

• Various options/design ideas researched
• Attained 2 lavage systems for testing
• Consulted with industry members for specific
  design considerations
• Discussed design criteria with heater
  manufacturers
• Selected heater and insulator types
• Thermofoil etched foil heater
• Kapton

8
Kapton

• High dielectric strength
• Resistant to acids, solvents, and bases
• Manufactured for fluid immersion
• Desireable Temperature Range
• -200 200 degrees C

9
Personal Achievements

• Assisted Joe with the Solidworks model and
  Cosmosworks experiment for current design
• Interviewed surgeons at Presby
• Consulted heater manufacturers
• Updated design history file

10
Updated Timetable

• Finite Element Analysis on heater using
  CosmosFloWorks
• (End of week)
• Decide on type of thermocouple
• (End of week)
• Order heater and thermocouple prototypes
• (End of week)
• Testing/Alterations
• (Second and third weeks of March)