A Mobile Embedded system for Biotelemetry

By: Aju krishnan
Guided by: Mr. Sanal K Daniel
College Of Engineering Trivandrum


What is biotelemetry?
Remote measurement of vital biological parameters of a person
Enables the monitoring of cardiovascular, asthma, Alzheimer's disease patients etc.
The parameters that maybe monitored are: ECG, SpO2, heart rate, blood pressure etc.

Measurements in biotelemetry
Any quantity measurable in biomedical field can be adaptable
Signals are categorized as:
Bioeletric potentials
Physiological potentials


Elements of biotelemetric system
The transducer converts the biological variable in to electrical
Signal conditioner amplifies and modifies this signal for effective transmission
Transmission page link connects the signal input blocks to the read out devices by wired or wireless means

The biotelemetic system
It is designed for monitoring patientsâ„¢ biological parameters from a distance
It is made from embedded hardware technology.
It is partitioned into two logical parts that communicate using custom data protocols.

The biotelemetry system
The logical parts of the system are:
The Inner part: It is located in the place where the patient spends most of the time.
It contains the hardware for measuring the biological signals.
The outer part: It is present at the hospital or the monitoring centre.
The data finally reaches here.


Inner part of the biotelemetric system
CEREBRUS: Mobile data acquiring unit
ORTHRUS: Stationary data forwarding unit.
SENSORS: Stationary data acquiring unit

Outer part of model biotelemetric system
Many inner parts may connect to a single outer part.
Communication through TCP and UDP protocols over fast ethernet.

Data processing hardware units
ORTHRUS and CEREBRUS contain the key data processing hardware
Outer part-Standard Servers

Data flows in the biotelemetric system
Dataflow from the CEREBRUS element
Dataflow from SENSOR elements
Management dataflow
Provisioning dataflow


Dataflow from the CERBERUS element
Three channel ECG data, Body & ambient temperature, Patientâ„¢s posture
Each assigned a Zigbee cluster ID for identification.

Dataflow from the SENSOR elements
The data measured are:
Heart rate
Blood pressure
Oxygen saturation
Body weight
Patientâ„¢s location

Display unit with the patient
It is part of CERBERUS
Contains LCD display and keypad

Visualization of the data
Patient can see his vital signs
Easy interpretation

Management dataflow
For centralized administration of the inner part of the Biotelemetric system
Messages sent are:
Notification and specification of error
Battery charge
Time setting
Parameters of the Zigbee network


Provisioning dataflow
To provide initial setting for the starting of the ORTHRUS element
It exists only in the outer part of the biotelemetric system.

Challenges in biotelemetric systems
System must have reasonable lifetime
Security of the sent data against eavesdropping
Security of the stored data in SERVERS.


Future prospects
Support for outdoor operation using 3G mobile technology and GPS for tracking
Generation of power through energy scavenging
Implantable transmitters

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report pdf:
http://mediafirefile/7n2cyat22p95ozd/Design%20and%20Application%20of%20Mobile%20Embedded%20Systems%20for%20Home%20Care%20Applications.pdf