This is the basic architecture of the system:
We have a sensor which is gaining “vitals” data, such as a pulse reading and sends this to a smartphone using Bluetooth.
From here the Smartphone will send the data to the Server vis a POST request.
The Raspberry Pi will use a RESTFul server(see https://en.wikipedia.org/wiki/Representational_state_transfer) and will store the data sent by the phone.
From here, physicians can easily access the data on the server through the RESTFul APIs