Oxygen dissociation curve shifts to the right by all of the following except:

A shift to the left indicates acceptance of oxygen by hemoglobin and the shift to right indicates dissociation of oxygen from hemoglobin. Factors favoring shift to right are — Decreased PO2 Increased PCO2 (Bohr effect) Increase in H+ concentration or decreased pH Excess of 2, 3 DPG (exercise, high altitudes) Increased body temperature