1. HEMODYNAMIC MONITORING Subject: Applied Doppler, Vascular Doppler.Presented By: Syed Shoaib Muhammad

2. Topics Hemodynamic Definition. Purpose. Types of Blood Flow Spectral Display 3. HEMODYNAMIC MONITORING DEFINITION: Measuring and monitoring the factors that influence the force and flow of blood.PURPOSE: To aid in diagnosing, monitoring and managing critically ill patients. 4. Types of Blood Flow. Six types of blood flow seen in the DopplerUltrasound. Plug Flow Laminar Flow Parabolic Flow Disturbed Flow Turbulent Flow Pulsatile Flow 5. The first we will discus the spectral display. 6. Spectral Display X- axis time information Y- axis frequency/velocity information. Z- axis amplitude information. 7. Spectral Display Systolic Peak VelocityVelocity Measurements2. End-diastolic velocityVelocity1. Peak systolic velocityMean Velocity3. Mean velocity calculated by taking the area under the curve.End Diastolic VelocityTime 8. Spectral Display Direction of Flow. Mono-phasic Bi-phasic Tri-phasic Bidirectional 9. Spectral Display Mono-phasic Flow Flow on just on side of the Baseline. The low resistance blood flow. Ideal resistance is the end diastolic is the half of peak systolic.FrequencyTime 10. Spectral Display Bi-phasic Flow Flow start on one side of the Baseline and then crosses to the other.FrequencyTime 11. Spectral Display Tri-phasic Flow Flow start on one side of the baseline side, then crosses to the other, then returns to the original side. That is the high resistance flow.FrequencyTime 12. Spectral Display Bidirectional FlowFrequencyFlow which occurs simultaneously on both sides of the baseline.Time 13. Spectrum Broadening Occurs usually: As the blood decelerates in diastole If sample volume is placed to close to the vessel wall In small vessels (parabolic velocity profile) Tortuous vessels. Low flow states.. Excessive gain/power/dynamic range 14. Spectral Display Systolic Peak VelocityResistive IndexVelocityRI = Max Min MaxMean Velocity End Diastolic VelocityTime 15. Spectral Display Systolic Peak VelocityPulsatility IndexVelocityPI = Max Min MeanMean Velocity End Diastolic VelocityTime 16. Spectral Display A/B RatioSystolic Peak VelocityVelocityA/B ratio= Max MinMean Velocity End Diastolic VelocityTime 17. Types of Blood Flow Plug Flow Laminar Flow Parabolic Flow Disturbed Flow Turbulent Flow Pulsatile Flow 18. Types of Blood Flow Plug Flow The flow of a body of ice or viscous fluid with no shearing between adjacent layers; idealized flow without any mixing of particles of fluid. 19. Types of Blood Flow Plug Flow 20. Types of Blood Flow Laminar Flow Nonturbulent streamline flow in parallel layers 21. Types of Blood Flow Laminar Flow 22. Types of Blood Flow Parabolic Flow pertaining to flow conditions in blood vessels. Under parabolic flow, blood cells in the middle of the vessels move the fastest, with a gradual decrease in flow velocity for points farther away from the center. 23. Types of Blood Flow Parabolic Flow 24. Types of Blood Flow Disturbed Flow Two types of disturbed flow. Normal and abnormal. Normal disturbed flowCarotid artery. 25. Types of Blood Flow Normal Disturbed Flow 26. Types of Blood Flow Disturbed Flow Two types of disturbed flow. Normal and abnormal. Abnormal disturbed flow 27. Types of Blood Flow Turbulent Flow The motion of a fluid having local velocities and pressures that fluctuate randomly. 28. Types of Blood Flow Turbulent Flow 29. Types of Blood Flow Pulsatile Flow In fluid dynamics, a flow with periodic variations is known as pulsatile flow. The cardiovascular system of chordate animals is very good example where pulsatile flow is found 30. Types of Blood Flow Pulsatile Flow 31. References.. http://en.wikipedia.org/wiki/Hemodynamics http://www.thefreedictionary.com/laminar http://medical-dictionary.thefreedictionary.com/parabolic http://www.thefreedictionary.com/disturbed+flow https://www.youtube.com/watch?v=I241zL4vJ7A