Which site will provide the most accurate pulse oximetry reading ...

[Jipu 123]

Which site will provide the most accurate pulse oximetry reading in the event of low peripheral perfusion?
 
  a. Toe c. Earlobe
  b. Thumb d. First digit

Question 2

Shining a red light with a wavelength of 660 nm on a blood sample will cause which of the fol-lowing?
 
  a. HHb will absorb less light than O2Hb.
  b. O2Hb will absorb less light than HHb.
  c. MetHb will absorb less light than O2Hb.
  d. Sulfhemoglobin will absorb more light than HHb.

[shayla]

Answer to Question 1

ANS: C
The earlobe is more central and is not as susceptible to reductions in peripheral perfusion as are the fingers and toes.

Answer to Question 2

ANS: B
When a light with a wavelength of 660 nm (red light) shines on a sample site, HHb absorbs more light than O2HB.

[Jipu 123]

Thanks for the timely response, appreciate it

[kishoreddi]

TYSM