Wireless ECG Monitoring Wireless ECG Monitoring SystemSystem

Adviser: Hung-Chi YangAdviser: Hung-Chi Yang

Speaker: Yu-Ming Chen Speaker: Yu-Ming Chen

Dina Simunic, Slaven Tomac, Ivan Vrdoljak University of Zagreb, Faculty of Electrical Engineering and

Computing Unska 3, 10000 Zagreb, Croatia * Centar za telemedicinu d.o.o.

Prilaz Gj. Dezelica 59, 10000 Zagreb, Croatia

2010/9/301

OutlineOutline

IntroductionIntroduction

ProductsProducts

ConclusionConclusion

2

IntroductionIntroduction

TelemedicineTelemedicine ：： Communications and information technologiesCommunications and information technologies

BBasis of two conceptsasis of two concepts ：： 1.Real time (synchronous) 1.Real time (synchronous)

2.Store-and-forward (asynchronous)2.Store-and-forward (asynchronous)

TelehealthTelehealth ：： 1.Preventive1.Preventive

2.Promotive 2.Promotive

3.Curative aspects3.Curative aspects

3

IntroductionIntroduction

Store Forward

PurposePurpose

5

● The wireless cardiac monitoring system allows patients to be monitored continuously for an extended, unlimited period and has been effective in the diagnosis of clinically significant, symptomatic, and asymptomatic cardiac arrhythmias.

Furthermore, the technology has the potential to reduce patient error, enhance diagnostic accuracy, decrease time to diagnosis, and improve patient care.

ProductsProducts

Typical cardiac pacemaker battery pack size (in millimeters).

6

1. Classical Ambulatory Cardiac Monitoring System

2. Wireless Cardiac Monitoring System

Classical Ambulatory

※Holter monitoring

※Cardiac event monitor

※Continuous loop recorder

EFFECTIVE ELECTRICAL PARAMETERS OF DIFFERENT SUBSTRATES ANDSUPERSTRATES(POWER IS GIVEN AT 1 m WHEN MAX 1-g SAR = 1.6W/kg

8

※Holter monitoring※Holter monitoring

9

※Cardiac event monitor

10

※Continuous loop recorder

11

Wireless Cardiac Monitoring System

(a) (b)

12

1. Lightweight, 2. High mobility 3. Wireless transmission 4. Low power

Properties

(a) (b)

13

(a)

14

Application

1. At home

2. In hospital

15

1. 600 Hz, with A/D 12 bit resolution2. Frequency range 0.05-100 Hz (-3dB)3. Dynamic range 16 Mv4. DC offset tolerance +/- 300 Mv5. Input impedance 100 MOhm6. Storage frequency 600 Hz, 300 Hz or 150 Hz7. Memory capacity from 8to 60 minutes8. Up to 3 independent bipolar or 5 independent unipolar ECG channels.

Bluetooth ECG samples data

16

The protocol consists of three phases

1. The Bluetooth connects the ECG-monitor and the computer,

whereas the ECG-monitor sends confirmation of the realized

connection with a dedicated frame.

2. Real-time monitoring mode

3. Take out of the total data (including sync) the «useful» data

17

Sync Length Command Data to trasmit Cheksum

Framework Structure

PERMITTIVITIES AND CONDUCTIVITIES FOR TISSUES OF THE REALISTIC SHOULDER AT 433 MHz FROM

18

Data Sets

ID DescriptionDescription

0 System informationSystem information

1 ScheduleSchedule

2 ECG dataECG data

222 Index fileIndex file

255 Real time dataReal time data

Bluetooth Connection

Event Possible Bluetooth Retrieval Active Bluetooth mode

Wireless ECG Technology Interface

Wireless ECG Technology Security

1. Every Bluetooth device has unique IEEE MAC address (48bits)

2. Frequency Hopping Spread Spectrum is being applied with low transmitter power

3. Bluetooth security protocol requires 2 secret keys:

a. authentication key (128-bits)

b. encription key (8-128-bits)

ConclusionConclusion

在日常生活中，無線心電監護系統，不僅可以用在家裡，在日常生活中，無線心電監護系統，不僅可以用在家裡，也可以用在臨床監測或救護車。因此，在運送病人時它也也可以用在臨床監測或救護車。因此，在運送病人時它也無需分離或重新附加導線。這真是一個方便的無需分離或重新附加導線。這真是一個方便的 ECGECG 監測監測儀器。儀器。

23

Thank you For your attentionThank you For your attention

24