Heated Pulse-LavageHeated Pulse-Lavage

Justin S. Miller, Joe McFerron, and Ashley DanicicJustin S. Miller, Joe McFerron, and Ashley Danicic

Dr. Dinakar Golla, M.DDr. Dinakar Golla, M.DLinda Huckenstein, R.NLinda Huckenstein, R.N

Bioengineering Senior DesignDepartment of BioengineeringUniversity of PittsburghFebruary 25, 2005

BackgroundBackground

• Lavages are most commonly used to remove Lavages are most commonly used to remove debris from an organ or cavity via repeated debris from an organ or cavity via repeated pulsing injections of a sterile solutionpulsing injections of a sterile solution

• Heating the solution would…Heating the solution would…• Increase circulation to the areaIncrease circulation to the area• Reduce the risk of infectionReduce the risk of infection• Increase the comfort of the patientIncrease the comfort of the patient

Review of DesignReview of Design

• Problem:Problem: A cheaper, simpler solution to A cheaper, simpler solution to providing heated saline during lavageproviding heated saline during lavage

• Avoid use of an additional reservoirAvoid use of an additional reservoir

• Solution:Solution: Eliminate external pumps/heaters Eliminate external pumps/heaters by applying heat directly to saline bagby applying heat directly to saline bag

OverviewOverview

• MethodsMethods• Criteria for successCriteria for success• Group Achievements since last meetingGroup Achievements since last meeting• Personal Achievements to datePersonal Achievements to date• Updated time tableUpdated time table

Methods ReviewMethods Review• Heating bodies comparedHeating bodies compared

• Heat ExchangerHeat Exchanger• Too bigToo big• Too expensive ($1,000-$2,000)Too expensive ($1,000-$2,000)• Constant flow via pumpConstant flow via pump

• MicrowaveMicrowave• No temperature ControlNo temperature Control• PVC IV Bag deforms at 135-180 degrees FPVC IV Bag deforms at 135-180 degrees F• Constant need for reheatingConstant need for reheating

• Etched Foil HeaterEtched Foil Heater• ThinThin• FlexibleFlexible• Integral ThermometerIntegral Thermometer

Criteria for successCriteria for success

• Ability to heat to specific temperatureAbility to heat to specific temperature

• Remains securely on bagRemains securely on bag

• Easy to use/operateEasy to use/operate

• Heating element is small, portable, and Heating element is small, portable, and flexibleflexible

Group AchievementsGroup Achievements

• Various options/design ideas researchedVarious options/design ideas researched• Attained 2 lavage systems for testingAttained 2 lavage systems for testing• Consulted with industry members for specific design Consulted with industry members for specific design

considerationsconsiderations• Discussed design criteria with heater manufacturersDiscussed design criteria with heater manufacturers• Selected heater and insulator typesSelected heater and insulator types

• Thermofoil etched foil heaterThermofoil etched foil heater• Kapton Kapton

KaptonKapton

• High dielectric strengthHigh dielectric strength

• Resistant to acids, solvents, and basesResistant to acids, solvents, and bases

• Manufactured for fluid immersionManufactured for fluid immersion

• Desireable Temperature RangeDesireable Temperature Range

• -200 – 200 degrees C-200 – 200 degrees C

Personal AchievementsPersonal Achievements

• Assisted Joe with the Solidworks model Assisted Joe with the Solidworks model and Cosmosworks experiment for and Cosmosworks experiment for current design current design

• Interviewed surgeons at PresbyInterviewed surgeons at Presby

• Consulted heater manufacturersConsulted heater manufacturers

• Updated design history fileUpdated design history file

Updated TimetableUpdated Timetable• Finite Element Analysis on heater using CosmosFloWorksFinite Element Analysis on heater using CosmosFloWorks

• (End of week)(End of week)• Decide on type of thermocouple Decide on type of thermocouple

• (End of week)(End of week)• Order heater and thermocouple prototypesOrder heater and thermocouple prototypes

• (End of week)(End of week)• Testing/Alterations Testing/Alterations

• (Second and third weeks of March)(Second and third weeks of March)