1. BIOTELEMETRY
Biotelemetry is the measurement of biologicalparameters over
a distance.
Biologicalparameters are such as:-
 Heart beats
 Blood pressure
 Blood flow
 Body temperature
 Sugar content of blood
 Respiration
 Amount of blood
 Blood types
 Patient conditions (alive or dead), etc.
There are many instances inwhichit is necessary tomonitor physiological
events froma distance.
Typical applications of biotelemetry
RF transmission for monitoring astronauts in space.
Patient monitoring where freedom of movement is
desired,
such as in obtainingan exercise ECG(Electrocardiogram).
Patient monitoring in ambulance and in other locations
away from the hospital.

2. Collection of medical data from a home or office.
Research on unrestrained or unanesthetizedanimals in
their natural habitat.
Use of telephone links for transmission of ECG or other
medical data.
Special internal techniquessuch as tracing acidity or
pressure through the gastrointestinal tract.
Isolation of an electrically susceptible patient from power
line –operated ECG Equipment to protect him from
accidental shock.
These applications have indicated need for systems that
can adapt existing methods of measuringphysiological
variables to a method of transmissionof resulting data.
This is the branch of biomedical instrumentation known
as biomedical telemetry or biotelemetry.
The means of transmitting the data from the point of
generation to the point of reception can take many forms.
Perhaps the simplest applicationof the principle of
biotelemetry is the stethoscope where by heart beats are
amplifiedacousticallyand transmitted through a hollow
tube system to be picked up by the ear of the physician for
interpretation.

3. Components of biotelemetry system
1. Amplifier
2. Oscillator
3. Power supply
4. ADC
5. DAC
6. Transducer
7. Processor
8.
1. Amplifier
2. Oscillator

4. 3. Power supply
4. ADC
5. DAC
6. Transducer
7. Processor

5. 8.