True about Carbon monoxide poisoning:
Ans: c. Orygen-haemoglobin saturation saturation Curve Becomes Hyperbolic Shape[Ref Ganong 25th/650-51; Guyton 12th/352; A K Jain 6th/ 431; httpst/pedclerk. bsd. uchicago. edu/page/ (www. nebi. Nlm. nih. gov)Carbon-monoxide-poisoning:Carbon monoxide shifts the oxygen-haemoglobin saturation curve to the left and changes it to a more hyperbolic shape.Less oxygen is available for the tissues.plasma level of carboxyhemoglobin is normally quite low.At baseline, levels up to 3 percent ,nay be seen in nonsmokers, while smokers may have levels up to 10-15 % percent.Left shift of O2-Hb dissociation curve occur in - CO poisoning HbF, myoglobin eb decrease in body temperature.CO has about 240 times the affinity of O2for Hb; this means that CO will combine with the same amount of Hb as 02 when the CO paial pressure is 240 times lower.
CO has 100 times more affinity than 02 for Hb
Cause right side shifting of 02 dissociation curve
Oxygen-haemoglobin saturation curve becomes hyperbolic shape
Pulse oximetry can accurately detect level of CO