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本帖最后由 shenxiu2 于 2009-12-8 00:32 编辑
1. The SpO2 is directly related to the blood pressure in TOF , this is probably due to the increase in mixing of deoxygenated blood to the oxygenated blood across the VSD when the systemic blood pressure goes down.. We know that in TOF , it is the balance between the systemic vascular resistance & the pulmonary vascular resistance that maintains the oxygenation to the body.
2. Sevoflurane induction is fine , as long as you maintain the systemic vascular resistance . It is advisable to draw out noradrenaline in the syringe & dilute into the correct dilution before induction , in case the SVR drop too much & patient desaturates. |
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