Earlier Monitoring Of Fetal Heartbeat


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  • CTG-cardiotocography.Antenatal testing- ECG of fetus during labour.
  • Hypoxia: Short of breath. As it builds up, sympathetic nervous system causes vasoconstriction and the fetal heart rate variability decreases.Abnormalities like defective heart valves , backflow of blood, i,ii,iii degree av blockage, etc.
  • Many of the tools should be considered screening tests only.Often a combination of tests is required to develop the full picture of fetal welfare.“Palpation, or examination by touch, is a process of the ‘hands-on’ identification and assessment of the position, growth and wellbeing of the baby” It establishes the lie of the fetus, determines the presenting part, descent and liquor volume
  • Earlier Monitoring Of Fetal Heartbeat

    1. 1. Earlier monitoring of fetal heartbeat<br />Sriram Dash<br />Reg. 0601289053<br />
    2. 2. A Brief Overview<br />What is fetal heart rate monitoring ? When it is required?<br />Why go for fetal heart rate monitoring ?Why as early as possible?<br />Fetal heart rate monitoring till date .<br />Methods.<br />Ultrasound.<br />ECG belts<br />Their Disadvantages.<br />
    3. 3. Contd…<br />Proposed heart rate monitoring method.<br />Plan.<br />Method.<br />Explanation with circuit concepts.<br />Advantages of the proposed methodology over currently available techniques.<br />Role of a biomedical Engineer.<br />References.<br />
    4. 4. What is fetal heart rate monitoring<br />Fetal heart rate monitoring is recording of ECG & CTG and monitoring of the heart as a whole of a fetus .<br />Only screening tests are available for monitoring fetal activity inside placenta, now-a-days.<br />The only accurate test till date is the antenatal testing.<br />But the monitoring of fetus should be done as early as possible.<br />
    5. 5. Why go for fetal heart rate monitoring? Why as early as possible?<br />
    6. 6. Contd…<br />The fetal heart beat is an important parameter in determining hypoxia.<br />Bradycardia occurrence can be detected.<br />Fetal heart rate is an indirect way of measurement of pH of the body.<br />Any abnormality in the structure of heart can be found by observing the ECG and PCG.<br />
    7. 7. Tools for Fetal Welfare Assessment<br />There are many tools available for assessing fetal welfare.<br />All tests have a reasonably low incidence of finding true fetal compromise.<br /> There are broadly two methods for fetal heart rate monitoring:<br />Ultrasound<br />ECG<br />
    8. 8. Ultrasound<br />Introduced from the late 1950’s and is currently considered a safe, non-invasive and cost-effective investigation.<br />Dating scans<br />Nuchal Translucency scans<br />Anomaly scans <br />Growth scans<br />Liquor Assessment<br />Arterial Doppler Wave Form Studies<br />
    9. 9.
    10. 10.
    11. 11. ECG Monitoring<br />Monitoring the baby&apos;s heart using electrocardiography (ECG) plus cardiotocography (CTG) during labour helps mothers and babies when continuous monitoring is needed.<br />This is done by placement of scalp electrodes on the baby during labour.<br />
    12. 12. Disadvantages <br />Inaccurate <br />Many interferences observed in ECG.<br />No clear picture of heart is obtained.<br />
    13. 13. Proposed heart rate monitoring method<br />The proposed method for recording the heart beat accurately and earlier consists of a wide belt, fitted with several ECG electrodes.<br />The data from the electrodes is fed to a monitor which analyses the data on an algorithm, for clear ECG data of the fetus.<br />
    14. 14. The Proposed Heart rate monitoring model<br />
    15. 15. The Adaptive filter <br />x(n) = v(n) + m(n)<br />x(n) : primary input to the filter, observed signal<br />v(n) : signal of interest<br />m(n) : primary noise<br />Adaptive filtering requires a second input r(n), ‘reference input’<br />
    16. 16. Corrected signal<br />Fetal ECG<br />Original signal<br />
    17. 17. Advantages <br />Accurate.<br />Fetal heart rate can be found earlier.<br />Multidimensional view of fetal heart can be obtained.<br />
    18. 18. References<br />Elizabeth Thomson.(2009).Techtalk. New system allows earlier monitoring of fetalheartbeat.53(27),4.<br />NSWHEALTH.(2008).Fetal Physiology.Cooke H. & Giles W.Retrived august 2009.<br />
    19. 19. Thanks<br />Any Queries??<br />