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Gas Exch. Analysis

Analysis & Monitoring of Gas Exchange

QuestionAnswer
A mechanically ventilated patient exhibits a sudden decrease in end-tidal CO2 levels. All of the following are possible causes of this change except. Increase in CO2 production
Indications for pulse oximetry include all of the following except the need: for measurements of abnormal Hb.
An alert outpatient waiting for an EKG has an SpO2 reading of 81% breathing room air. The patient appears in no distress and exhibits no signs of hypoxemia. Which of the following would be the best initial action to take in this situation? Switch sites or replace the sensor probe.
To avoid transmission of blood-borne diseases when handling a used needle, what should you do? I. Never recap needle without safety device (or scoop method).II. Never handle needle with both hands, or point it towards body.III. Never bend, break, or remove the needle from the syringe by hand.IV. Always dispose of syringe/ needle in sharps container
After obtaining an arterial blood sample, what should you do? I. Apply pressure to the puncture site until bleeding stops. II. Place the sample in a transport container with ice slush. IV. Mix the sample by rolling and inverting the syringe.
An outpatient scheduled for an arterial blood sample enters the pulmonary lab 20 minutes late and out of breath, having run up four flights of stairs. What should you do? Wait 5 minutes before taking the sample.
All of the following can result in falsely high HbO2 readings with a laboratory hemoximeter except. Sickle cell anemia
Which of the following should be monitored during the sampling of arterial blood? II. Presence of pulsatile blood return. III. Presence of air bubbles or clots in sample.
What is a normal end-tidalETCO2 range? 35 to 43 mm Hg
A patient being monitored by capnography exhibits a sudden rise in end-tidal CO2 levels. All of the following are possible causes of this change except. Massive pulmonary embolism
If patient pain or anxiety occurs during arterial puncture, which of the following will probably occur? Hyperventilation
Purposes of a needle-capping device include which of the following? I. To isolate the sample from air exposure. II. To help prevent needlestick injuries.
You obtain an SpO2 reading of 100% on a patient receiving O2 through a nonrebreathing mask. What range of PaO2 levels is possible in this patient? 100 to 600 mm Hg
Why is the radial artery the preferred site for arterial blood sampling? I. It is near the surface and easy to palpate and stabilize. II. The ulnar artery normally provides good collateral circulation. III. The radial artery is not near any large veins.
Because of an extremely low PO2, you suspect that an arterial blood sample taken from a patient's brachial artery might have been contaminated with venous blood. Which of the following might help to confirm your suspicion? Cross-check the sample with an SpO2 reading.
All of the following can help avoid the problem of arterial blood sample contamination with air except. Mixing before expelling air
When performing a modified Allen test on the left hand of a patient, you notice that the palm, fingers, and thumb remain blanched for more than 15 seconds after pressure on the ulnar artery is released. What should you do? Perform the Allen test on the right hand.
A practitioner forgets to ice an ABG sample and leaves it at room temperature for 45 minutes. Which of the following parameters can you predict will increase in this sample during that period? I. PCO2
All of the following sites are used for arterial blood sampling by percutaneous needle puncture except: Carotid
Created by: 1675085175
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