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Currently there are three nasal prongs connected to a child during polysomnography: a resistor to detect temperature difference between inhaled and exhaled air, pressure sensors that show a flattening pressure profile during upper airway narrowing, and CO2 sampling tubes to sense exhaled CO2. This is inefficient and uncomfortable for the child. The goal is to design and develop a prototype that combines these three devices into one apparatus that samples from both the nose and the mouth, and attaches to the child in both a durable and comfortable fashion.
Robyn Hrobsky, Lindsey Carlson, Jack Page, Nicole Daehn
What is your project status?
| Week | Reporting Period Beginning | Activities |
|---|---|---|
| 1 | September 5 | Decided on Team Roles, Met with client: determined criteria for project, planned trip to Sleep Center, began background research, and received tubes/prongs to examine |
| 2 | September 12 | Divided PDS among group, currently generating questions for client based on PDS and other ideas, and completed Gantt chart for semester |
| 3 | September 19 | Made visit to UW Sleep Lab, completed draft of PDS, and contacted professors in the sleep field and other relevant fields |
| 4 | September 26 | Brainstormed potential ideas, met with Professor Webster and Amit to discuss thermistors, tested actual thermistor to observe resistance changes, and discussed ideas with Dr. Green |
| 5 | October 3 | Discussed types of possible thermistors, went to lab to test thermistors, and discussed design ideas and alternatives |
| 6 | October 10 | Attended SolidWorks training session as a team, met with Dr. Green to discuss design ideas, made design matrix, and made SolidWorks drawings of alternate designs. |
| 7 | October 17 | Completed Midsemester presentation, began process of ordering materials, prepared a list of supplies for client, and made appointment to visit UW Polymer Lab |
| 8 | October 24 | Attended client meeting, began LabView program, ordered materials for prototype, and investigated plastic moldings to attach thermistors to cannula |
| 9 | October 31 | Finished the LabView program, tested thermistors as well as ones that had been injection molded, and constructed an amplifying circuit with three thermistors |
| 10 | November 7 | Tested surface mount, disc, and coated thermistors, ordered heat shrink, and molded the face piece attachment |
| 11 | November 14 | Tested thermistors at various temperatures to see relation to voltage, began constructing prototype, and added heat shrink tubing to prototype |
| 12 | November 21 | Connected attachment wires to prototype and added more heat shrink tubing, tested prototype with LabView program and began work on the Final paper |
| 13 | November 28 | Switched from using surface mount thermistors to beaded thermistors on prototype, obtained screen shots from sleep lab for presentation, had client meeting and discussed future work, and completed poster |
| 14 | December 5 | Poster presentation given this week |
| 15 | December 12 |
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PDS (Oct 16 2008, 113 kb) |
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Midsemester Presentation (Oct 16 2008, 3211 kb) |
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Poster (Dec 11 2008, 752 kb) |
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Final Paper (Dec 11 2008, 5164 kb) |
