There are certain pluse-ox devices that are often sold for use by the general public in helping them with their excersie programs, but they are not FDA approved. Here is an example:
http://www.rei.com/online/store/ProductD...p;amp;langId=-1

Here are some web sites for the self-contained finger model:

http://www.coralmed.com/index.cgi?page=pulse_ox.html&cart_id=4497140_24272
http://www.scantechmedical.com/onyx.htm
http://sales.reddingmedical.com/merchant.cfm?id=1147&step=4


They work the same and may even be the same model, but the ones for the general public are marked/listed as "not a medical device". Pete