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Earlier monitoring of fetal heartbeat
Sriram DashReg. 0601289053
A Brief OverviewWhat is fetal heart rate monitoring ? When it
is required?Why go for fetal heart rate monitoring ?Why
as early as possible?Fetal heart rate monitoring till date .
Methods. Ultrasound. ECG belts
Their Disadvantages.
Contd…Proposed heart rate monitoring method.
Plan.Method.Explanation with circuit concepts.
Advantages of the proposed methodology over currently available techniques.
Role of a biomedical Engineer.References.
What is fetal heart rate monitoringFetal heart rate monitoring is recording of
ECG & CTG and monitoring of the heart as a whole of a fetus .
Only screening tests are available for monitoring fetal activity inside placenta, now-a-days.
The only accurate test till date is the antenatal testing.
But the monitoring of fetus should be done as early as possible.
Why go for fetal heart rate monitoring? Why as early as possible?
Contd…The fetal heart beat is an important
parameter in determining hypoxia.Bradycardia occurrence can be detected.Fetal heart rate is an indirect way of
measurement of pH of the body.Any abnormality in the structure of heart can
be found by observing the ECG and PCG.
Tools for Fetal Welfare AssessmentThere are many tools available for assessing
fetal welfare.All tests have a reasonably low incidence of
finding true fetal compromise. There are broadly two methods for fetal
heart rate monitoring:UltrasoundECG
UltrasoundIntroduced from the late 1950’s and is
currently considered a safe, non-invasive and cost-effective investigation.Dating scansNuchal Translucency scansAnomaly scans Growth scansLiquor AssessmentArterial Doppler Wave Form Studies
ECG MonitoringMonitoring the baby's heart using
electrocardiography (ECG) plus cardiotocography (CTG) during labour helps mothers and babies when continuous monitoring is needed.
This is done by placement of scalp electrodes on the baby during labour.
Disadvantages Inaccurate Many interferences observed in ECG.No clear picture of heart is obtained.
Proposed heart rate monitoring methodThe proposed method for recording the heart
beat accurately and earlier consists of a wide belt, fitted with several ECG electrodes.
The data from the electrodes is fed to a monitor which analyses the data on an algorithm, for clear ECG data of the fetus.
The Proposed Heart rate monitoring model
x(n) = v(n) + m(n)x(n) : primary input to the filter, observed signalv(n) : signal of interestm(n) : primary noiseAdaptive filtering requires a second input r(n), ‘reference input’
The Adaptive filter
Original signal
Fetal ECG
Corrected signal
Advantages Accurate.Fetal heart rate can be found earlier.Multidimensional view of fetal heart can be
obtained.
ReferencesElizabeth Thomson.(2009).Techtalk. New
system allows earlier monitoring of fetal heart beat.53(27),4.
NSWHEALTH.(2008).Fetal Physiology. Cooke H. & Giles W.Retrived august 2009.
Thanks
Any Queries??