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Author Question: A pulse oximeter reading will be most accurate when used with a patient in which of the follow-ing ... (Read 76 times)

audragclark

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on: Jul 16, 2018
A pulse oximeter reading will be most accurate when used with a patient in which of the follow-ing situations?
 
  a. An intensive care unit patient with hyper-bilirubinemia
  b. A hypotensive patient receiving peripheral vasoconstrictors
  c. An emergency department patient with evidence of smoke inhalation
  d. An open heart patient receiving extracor-poreal membrane oxygenation

Question 2

The type of breath shown in the flow-volume loop below is which of the following?
 
  a. Pressure support ventilation (PSV)
  b. Continuous positive airway pressure (CPAP)
  c. Pressure-controlled continuous mandatory ventilation (PC-CMV)
  d. Spontaneous without support


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Kedrick2014

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Reply #1 on: Jul 16, 2018
Answer to Question 1

ANS: A
Hyperbilirubinemia does not appear to affect pulse oximetry measurements as do low perfusion states, which are caused by the use of peripheral vasoconstrictors or extracorporeal membrane oxygenation (ECMO). Carbon monoxide poisoning will lead to an overestimation of oxygen sat-uration measured by pulse oximeter (SpO2).

Answer to Question 2

ANS: D
Part of the flow-volume curve occurs to the left of the y-axis; this reflects a drop in pressure dur-ing inspiration (pressure value becomes negative) and an increase in pressure with exhalation (pressure becomes positive).


audragclark

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Reply #2 on: Jul 16, 2018
Thank you


Kedrick2014

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Reply #3 on: Jul 16, 2018
No problemo


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