- Joined
- Feb 18, 2013
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Question from TPR
Q: A child with Down's syndrome has a common arterial trunk that comes off both the left and right ventricles. Which of the following occurs?
A) Aortic arterial blood oxygen saturation is lower than normal.
B) Pulmonary arterial blood oxygen saturation is lower than normal.
Answer: A
I understand why A is true. The blood of the two ventricles mix. However, why is B false? Why would the pulmonary arterial blood oxygen saturation be higher than normal?
Also, just out of curiosity, would the pressures in the ventricles increase or decrease?
Circulatory system is a weakness of mine. Thanks for the help!
Q: A child with Down's syndrome has a common arterial trunk that comes off both the left and right ventricles. Which of the following occurs?
A) Aortic arterial blood oxygen saturation is lower than normal.
B) Pulmonary arterial blood oxygen saturation is lower than normal.
Answer: A
I understand why A is true. The blood of the two ventricles mix. However, why is B false? Why would the pulmonary arterial blood oxygen saturation be higher than normal?
Also, just out of curiosity, would the pressures in the ventricles increase or decrease?
Circulatory system is a weakness of mine. Thanks for the help!