For telemedicine puposes you can use it.

This area is very interesting. Using Bio Sensors we can create and monitor Body Area Networks. Patient health monitoring is one of several applications. This new area is also called Body Sensor Area Networks. See some of my papers in this regards in the links

https://docs.google.com/viewer?url=http://www.ist.edu.pk/downloads/jst/previous-issues/june-2014/6.pdf&embedded=true

https://docs.google.com/viewer?url=http://www.ist.edu.pk/downloads/jst/previous-issues/june-2014/7.pdf&embedded=true

your application should be specific. some area of research may be:

body area network -  put sensors over the body (where needed) to monitor something

wireless  sensor - heartbeat, movement, heat etc. 

implantable sensors - capsule sensors, implantable devices etc. 

good luck.

very wide open question

Body Area Network - Reducing Latency

This area is a big research field, we can widely apply/use WSN for bio-medical fields.

Like body area network, Bio medical sensors, can be applied for Patient monitoring and patient treatment. There are quite number of papers available on this area.

You can use sensor to sense various parameters like temperature, pressure of the patient. Also it will be useful to monitor the temperature level of a child kept in incubation

This area is very interesting. You can use WSNs to do simple tasks such  as monitor particular human health parameters such as blood pressure, heart attacks, prevent dangerous issues in human complications and etc. However, there is an interesting research going on nowadays where you can use WSNs injected into the body to flow with your blood circulation. In such scenarios, what you would like to do is to do some controls in a distributed fashion such as brain control, or what you can do is to use WSNs to particularly activate any paralyzed part of the body. In this case the sensor nodes mimic neurons. You can do plenty of good things with WSNs. Hope this helps you. If you have further questions or need to ask some more feel free to contact me.

Good Luck!

Edmond

Yes. BAN is an interesting field

Research in bio-material field has opened many research possibilities. You can try 

Body area networks is actually the application of wireless sensor networks for health monitoring. In general wireless sensor networks collect information like temperature etc. and transmit it to a central node, this is equally applicable for body area networks, in which sensors can sense, ecg, eeg, temperature etc. and transmit the information to a medical monitoring center for processing, storage and monitoring.