Earlier Monitoring Of Fetal Heartbeat

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  • CTG-cardiotocography.
    Antenatal testing- ECG of fetus during labour.
    Fetal heart rate 110 to 160 bpm.
  • Fetal well being can be determined by response of fetal heart rate to uterine contractions.
    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 Sriram Dash Reg. 0601289053
    2. 2. Outline • What 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.
    3. 3. Contd… • Proposed heart rate monitoring method. – Plan. – Method. – Explanation with circuit concepts. • Advantages of the proposed methodology over currently available techniques. • References.
    4. 4. What is fetal heart rate monitoring • Fetal 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.
    5. 5. Why go for fetal heart rate monitoring? Why as early as possible?
    6. 6. 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-Acidosis. • Any abnormality in the structure of heart can be found by observing the ECG ,PCG and CTG.
    7. 7. Tools for Fetal Welfare Assessment • There 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: – Ultrasound – ECG
    8. 8. Ultrasound • Introduced from the late 1950’s , it is currently considered a safe, non-invasive and cost-effective investigation. – Dating scans – Nuchal Translucency scans – Anomaly scans – Growth scans – Liquor Assessment
    9. 9. ECG Monitoring • Monitoring 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.
    10. 10. Disadvantages • Inaccurate • Many interferences observed in ECG. • No clear picture of heart is obtained.
    11. 11. Proposed heart rate monitoring method • The 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.
    12. 12. The Proposed Heart rate monitoring model
    13. 13. The Adaptive filter x(n) = v(n) + m(n) x(n) : primary input to the filter, observed signal v(n) : signal of interest m(n) : primary noise Adaptive filtering requires a second input r(n), ‘reference input’
    14. 14. Contd… Original signal Fetal ECG Corrected signal
    15. 15. Conclusion • Accurate. • Fetal heart rate can be found earlier. • Added Advantage-Multidimensional view of fetal heart can be obtained.
    16. 16. References • Elizabeth Thomson.(2009).Techtalk. New system allows earlier monitoring of fetal heart beat.53(27),4. • NSWHEALTH.(2008).Fetal Physiology. Cooke H. & Giles W. Retrieved august 2009.

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