Cyanosis is seen if:

 # Cyanosis is seen if:

a) Meth Hb 1.5gm%

b) Sulf Hb 0.5gm%

c) Reduced Hb 5gm%

d) All of the above

The correct answer is D. All of the above.

Types of cyanosis

- Central 

- Peripheral

- Cyanosis due to abnormal pigments (methemoglobin, sulfhemoglobin)

- Mixed

CENTRAL CYANOSIS

Mechanism:

Diminished arterial oxygen saturation

Sites:

On skin & mucous membranes

Eg.: Tongue, lips, cheeks

Temperature of the Limb

Warm

PERIPHERAL CYANOSIS

Mechanism:

Diminished flow of blood to the local part

Sites:

On skin only

Temperature of the Limb

Cold