Your SlideShare is downloading. ×
0
Calculation of bidirectional shunts
Calculation of bidirectional shunts
Calculation of bidirectional shunts
Calculation of bidirectional shunts
Calculation of bidirectional shunts
Calculation of bidirectional shunts
Calculation of bidirectional shunts
Calculation of bidirectional shunts
Calculation of bidirectional shunts
Calculation of bidirectional shunts
Calculation of bidirectional shunts
Calculation of bidirectional shunts
Calculation of bidirectional shunts
Calculation of bidirectional shunts
Calculation of bidirectional shunts
Calculation of bidirectional shunts
Calculation of bidirectional shunts
Calculation of bidirectional shunts
Calculation of bidirectional shunts
Calculation of bidirectional shunts
Calculation of bidirectional shunts
Calculation of bidirectional shunts
Upcoming SlideShare
Loading in...5
×

Thanks for flagging this SlideShare!

Oops! An error has occurred.

×
Saving this for later? Get the SlideShare app to save on your phone or tablet. Read anywhere, anytime – even offline.
Text the download link to your phone
Standard text messaging rates apply

Calculation of bidirectional shunts

942

Published on

Calculation of bidirectional shunt in cathlab

Calculation of bidirectional shunt in cathlab

Published in: Health & Medicine
0 Comments
1 Like
Statistics
Notes
  • Be the first to comment

No Downloads
Views
Total Views
942
On Slideshare
0
From Embeds
0
Number of Embeds
3
Actions
Shares
0
Downloads
33
Comments
0
Likes
1
Embeds 0
No embeds

Report content
Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
No notes for slide

Transcript

  • 1. Calculation of Bidirectional Shunts Cross road both for examinee and examiner
  • 2. Shunt Run • “Shunt Run” is performed if a difference of 8% or more is noted in blood sampling between chambers
  • 3. Smaller physical, biggest physiological
  • 4. Flamm’s
  • 5. Flamm’s MVO2 • Average Oxygen Content in Chambers proximal to the Shunt • Method to calculate Mixed Venous Oxygen content • Need to factor in Contribution from IVC and SVC which is not equal • Flamm Equation: 3xSVC Oxygen Content + IVC Oxygen Content _____________________________________ 4
  • 6. Dissolved O2
  • 7. Fick Equation to Calculate Oxygen Content • Assumes in steady state that… that rate of substance entering (C in x Qflow) is equal to the rate of substance leaving (C out x Qflow) + the rate at which indicator, V, is added. Flow= Oxygen consumption/Arterial- Venous oxygen content difference • Where oxygen content is determined by automated methods • oxygen consumption is assumed based on patient’s age, gender and body surface area when not directly measured
  • 8. Fick’s
  • 9. Puzzles of 6 • MVO2 • PAO2 • PVO2 • SAO2 • QP • QS
  • 10. Pulmonary Blood Flow
  • 11. Systemic Blood flow
  • 12. Qeff
  • 13. In the Absence of Shunt in series •PBF=SBF=EBF
  • 14. Left-to-right shunt • The approximate left-to-right shunt then = Q p - Q eff
  • 15. Left to Right shunt
  • 16. Left to right shunt
  • 17. Effective Blood Flow • Fraction of Mixed Venous blood received by the lungs without contamination from shunt(from left to right)
  • 18. Right-to-left shunt • the approximate right-to-left shunt equals Q s- Q eff
  • 19. Right to left shunt
  • 20. Just understand ,do not mug it up

×