What are the two wavelengths of light used to determine hemoglobin saturation with a pulse oximeter?
a. 550 nm and 730 nm c. 730 nm and 940 nm
b. 660 nm and 940 nm d. 550 nm and 840 nm
ANS: B
O2Hb and deoxygenated hemoglobin (HHb) are differentiated by shining a light with 660-nm and 940-nm wavelengths through the sampling site.
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The AEMT understands the primary reason to obtain a medical history using the SAMPLE mnemonic when he states:
A) "The SAMPLE mnemonic helps AEMTs to diagnose a patient's medical problem." B) "The SAMPLE mnemonic is important because it will give the AEMT the patient's exact chief complaint." C) "After performing the primary assessment, the SAMPLE mnemonic helps guide the AEMT in further assessment and care." D) "It is important to use the SAMPLE mnemonic because the emergency department will need the information."
Which of the following needles is the largest?
A) 18 G B) 27 G C) 21 G D) 16 G