Left to Right Shunts and their Calculation Ghada ... - CardioEgypt.com

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3/18/2013 Shunt Measurement Limitations of Oximetric Method • Requires steady state with rapid collection of O 2 samples • Insensitive to small shunts • Flow dependent – Normal variability of blood oxygen saturation in the right heart chambers is influenced by magnitude of SBF – High flow state may simulate a left-to-right shunt • When O 2 content is utilized (as opposed to O 2 sat), the step-up is dependent on hemoglobin. Baim DS: Grossman’s Cardiac Catheterization, Angiography, and Intervention. 7 th Edition. Lippincot Williams and Wilkins, 2007. SOME TIPS FOR QP, QS CALCULATIONS 28
3/18/2013 • If you do not directly obtain a pulmonary vein or LA saturation, assume something appropriate to the clinical status of the patient ( ~95–100% in the absence of lung disease) • Always double check and confirm your math. • Always document all assumptions in your catheterization report. 29
Page 1 and 2: 3/18/2013 Left to Right Shunts and
Page 3 and 4: 3/18/2013 Left to right shunts •
Page 5 and 6: 3/18/2013 Determinants of shunt siz
Page 7 and 8: 3/18/2013 Clinical data: ASD • Fl
Page 9 and 10: 3/18/2013 Shunt Detection : Indocya
Page 11 and 12: 3/18/2013 Indicator Dilution Method
Page 13 and 14: 3/18/2013 ASD Detection of Left-to-
Page 15 and 16: 3/18/2013 • Calculation of system
Page 17 and 18: 3/18/2013 Concept • So, using art
Page 19 and 20: 3/18/2013 O2 content = 1.36 Hgb X s
Page 21 and 22: 3/18/2013 • Using this principle,
Page 23 and 24: 3/18/2013 Shunt Detection & Measure
Page 25 and 26: 3/18/2013 • For pediatric cathete
Page 27: 3/18/2013 Shunt Measurement: Effect
Page 31 and 32: 3/18/2013 Cardiac Output Measuremen
Page 37: 3/18/2013 Accurate measurements & c

Left to Right Shunts and their Calculation Ghada ... - CardioEgypt.com

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