Oxygen-hemoglobin dissociation curve

 

Shift

Right Shift

Left Shift

Affection 

for oxygen

Decreased affinity

Increased affinity

Hb-oxygen 

binding

Oxygen is less tightly bound;

more readily released

Oxygen is more tightly bound; 

less readily released 

Causes

– Increased CO2

– Decreased CO2

 

– Increased temperature

– Decreased temperature

 

– Decreased pH (acidosis)

– Increased pH (alkalosis)

 

– Increased 2,3-BPG

– Decreased 2,-BPG

Implication

Enhanced oxygen delivery

to tissues

Reduced oxygen delivery

to tissues

 

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