John McMillian Central High School Philadelphia, PA 19140

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John McMillianCentral High SchoolPhiladelphia,
PA 19140

• RET Fellow, July August 2003
• Drexel University
• Mechanics and Mechanical Engineering
• 3100 Chestnut Streets
• Philadelphia, PA 19103

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RET EXPERIENCEStudies on Obstructive Sleep Apnea
Syndrome (OSAS)

• Obstructive Sleep Apnea (OSAS) is a condition in
  which a child stops breathing for either two
  respiratory cycles or from two to ten seconds.
• If left untreated, OSAS can result in mental
  retardation, malaise, or even death.
• OSAS can also result in mental retardation,
  Attention Deficit Disorder, or other learning and
  behavioral problems.

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Air Flow in a Patient with Obstructive Sleep
Apnea Syndrome

• Air enters the body through the nostrils.
• It continues from the nostrils through the nasal
  cavity, pharynx, larynx, trachea, bronchial
  tubes, and lungs
• Most of the cases involving sleep apnea in
  children are related to adenotonsillar
  hypertrophy.

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Dr. David WoottonDepartment of Mechanics and
Mechanical Engineering

• A team of students, working in the laboratory of
  Dr. David Wootton, designed a model to measure
  pressure differences in the pathway of an air
  chamber.
• The team included Chun Xu, Sang Hoon Shin, Priya
  Vaidyanathan, Chang-Beom Kim, and Ryan Hoover.

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Operation of the Air Chamber Model
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Nasal Cavity/AirWay Model
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Curriculum PlanFactors that Affect Transpiration
in Higher Plants

• Can study an isolated system
• Can visualize a process that is otherwise
  microscopic
• Can repeat the activity without stress to the
  system

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Laboratory Exercise

• Students will compare the rate of water flow and
  pressure in capillary tubes with various bore
  sizes and in a potometer of living plants.

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Final Performance

• The student will use pro Engineer to modify the
  artificial transpiration model. The modification
  should either involve augmenting or reducing the
  rate of water movement in each capillary tube of
  the model.
• How might the modification affect plant
  metabolism?

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Thank You

• Dr. David Wootton Ph.D, Drexel University
• Dr. Raanan Arens M.D., Childrens Hospital of
  Philadelphia
• Joe McDonough, Biomedical Engineer, Childrens
  Hospital of Philadelphia
• Dr. Allon Guez
• Chun Xu
• Chang-Beom Kim
• Sang-Hoon Shin
• Priya Vaidyanathan
• Ryan Hoover
• Thats a wrap!!!!