sensor to read people's breathing

Hi guys

I am stuck on a project where i am detecting if a patient is having a heart attack. The part where i am stuck at is on collecting data on the patient breathing. I saw in other forums that i could use one temperature sensor on the patient's nose and another was to use Zephyr. can anyone give us some ideas please?

Is there a sensor that does capture people's breathing?

Thank you

A sensitive pressure sensor that changes pressure with in and out breathing?

Weedpharma

One of my customers holds a patent on such a device and uses it in his product. If you are working on a commercial application, I can put you in touch with him. If this is a classroom project, then he would not be interested.

Paul