Phoenix Ambulatory Blood Pressure Monitor Project
6/14/2009 Meeting Notes




* Bob: Two people expressed interest in Phoenix at the recent IEEE banquet. Larry will contact them and send their contact info to El to be recorded.
* Larry: Not much happening in the lab as Larry's been out sick for 3 weeks. Steven has started defining specific projects for sensor projects and data acquisition board projects, and has developed more specific interests in the sensors. William is still putting in final changes to his first circuit board layout. Jim Holte stopped by with some ideas for different sensor technologies, and pointed out that we might be able to use EE department resources to get circuit boards made at reasonable costs.
* Bob again: Works on porcine MRI, apply RF to head, inside the brain is photooptic sensors, signal comes out on glass fiber. A bad effect occurs, pig's brain temp rises, pig dies. Rises while NOT applying RF (it's afterwards). Ways body uses heat energy: radioation, convective (body heats, air around it rises, carrying away energy), forced air, conduction (tissue to tissue, tissue to blood). What's happened might be that that mechanism is affected, some blood vessels (veins) are blocked. 3 to 5% reduction in blood flow will cause brain temp to rise. When does the problem with the pigs occur? Usually 2:00 to 3:00 in the afternoon. How does that compare to Sphygmochron? Smaller stroke volumn from heart might be leading to less cooling at that time of day. All theory at this point - no ABPMs for pigs in Bob's lab, but he'd like to have some. Is use on animals a new requirement for Phoenix?
* Chris: How does animal research differ from human research differ from clinical stuides/trials? Pretend Phoenix requirement is that it's used with animals - device would be specific to animal, but interface portion (data download) might be the same if concepts of systolic and diastolic pressure still hold. (People who do cardiac studies use dogs and pigs regularly) A large part of Phoenix system could be used in animal studies, including data analysis.
* Dr. Halberg: History of medicine: Vienna school knew that various concoctions in use had components working against each other. School said clean the slate, start over. Astronomy: now we know about the 35-year Bruckner cycle built into us, though it's forgotten by geophysicists. Germaine found 35-year cycle in Franz' 22 years of BP data. (It was first found in a 40-year series of BP, then in a person's 30-year series, and now in Franz' 22 year series. The fact that it was found in a series longer than the cycle first makes it reasonable to try to find it in the shorter 22 year series, though finding a cycle in data that's not at least one cycle long is always a bit questionable.)
* Mithun: Working on system requirements, template complete, filling in sections, another 3 or 4 weeks. 3 points to discuss:
1. architecture: design question - what is principle of measurement? Has implications on choosing a microcontroller. Larry's answer: for the prototype board, piezoelectric film with a circuit that filters and amplifies to 3 or 5 volts. No need for microcontroller that has motor control capabilities.
2. States or modes of operation? Chris' answer: off, init, active sensing (taking a measurement), sleep, offloading data, as a start. Design activities will add to the list of states later.
3. Did some research on BP monitors in research community, looked at Inspec, Medline, Google Scholar, IEEE. Most papers were related to validating existing devices. What keywords should he use to look for more designs?
Germaine's suggestion: start from list of validated devices, google for the design.
Bob's suggestion: look at Engineering Village (U of M library offers this service), Look at Comdex and Inspec simultaneously, not separately, and not in combination with others. Also use IEEE EMBS as keyword. Use names of engineering magazines, look at their websites' archives.


Discussion on upcoming Mini-symposium

Franz and Germaine plan a mini-symposium July 27, 2009. People invited from many different countries. 1 day symposium. Format: very informal - partly presentations, partly discussions. Major topic: mostly bp monitoring, why we want to do it, heathcare and research for environmental effects.

People known to be planning on coming so far: A statistician from England will be there (from industry) - may be outlet for publicity. A person who's been on WHO. Miguel. Someone from NIH - may foot bills for magnetolabile family (pain symptoms appear depending on how much magnetic activity there is). Physicist from Germany, very theoretical, using equations to figure out what the effects of magnetism are. 2 chronobiologists from China, recently studied activity in mice around time of earthquake in Cheng Du. 2 people from Russia (Moscow), Friendship University, has A&D monitors on himself and students and rabbits. Two people from Pennington, Louisiana, using Spacelabs BP monitor, can separate people iwth glucose intolerance from heathy people by interpreting chronobiologically.

Franz has invited A&D; if they don't come, will invite OMRON.

We plan for Chris and Larry to each do a presentation/discussion of some sort.
Chris: Did usage scenarios & privacy requirements paper two years ago. Might talk about a solution architecture for Ambulatory blood pressure monitoring.
Larry: Catch up on wrist monitor analysis, present requirements for manufacturers of existing devices. Demo usage of A&D monitor and Microsoft Health Vault.

Shoot for dry runs at July 12 Phoenix meeting from Chris and Larry.


About This Page

This page is maintained by Larry A. Beaty. It was last updated on 16 June 2009.

The author(s) provide this information as a public service, and agree to place any novel and useful inventions disclosed herein into the public domain. They are not aware that this material infringes on the patent, copyright, trademark or trade secret rights of others. However, there is a possibility that such infringement may exist without their knowledge. The user assumes all responsibility for determining if this information infringes on the intellectual property rights of others before applying it to products or services.

Copyright (C) 2009 Larry A. Beaty. Copying and distribution of this page is permitted in any medium, provided this notice is preserved.

Back to the Meeting Archive Page

Back to the Phoenix Home Page