Unless the device can be sterilized and hardened it's not Certified for use in any Medical Environment here.
Small Medical Practices may use things like this but the reality is that if the Practice needs to meet Certification Levels to carry on their business they can not use things like iProducts.
Besides why would you personally buy any product like those listed in the blog when you can buy a wrist watch and do the same thing and it doesn't stand out. The idea of monitoring Blood Pressure and heart action is the need to constantly monitor these things so being able to remove and only use when you feel like it for patients other than Hypochondriacs is a waste of time and effort.
Of course the Hypochondriacs using things like this is a even bigger waste of time and effort as they convince themselves that they are close to death and eat up the Medical Practitioners time and Testing Facilities when it's a unnecessary action. Though if they start to Self Medicate to treat themselves they are likely to suffer Adverse Medical Outcomes which can be a great thing for the Medical Practitioners as they kill themselves and remove the time wasted in needing to treat them for their own stupidity.

As for a Blood Glucose Meter with a good one with a Life Time Guarantee being only $15.00 in the local Chemist why would you waste your time and money buying a add on for your iDevice when they are not calibrated to the strips being used? All Test Strips have a life expectancy and need to be used within the time frame on the Box. They also come with a Calibration Plug to plug into the BGM to correctly report the Blood Glucose Levels. Getting the wrong or a incorrect reading on a device like this is worse than useless and can lead to adverse medical outcomes because of equipment errors.
Col