What pressure range may be necessary to achieve a sufficient VT using a chest cuirass?
a. ?10 to ?20 cm H2O
b. ?25 to ?50 cm H2O
c. ?35 to ?60 cm H2O
d. ?50 to ?75 cm H2O
ANS: C
Pressures of −35 to −60 cm H2O may be necessary to achieve a sufficient VT with a chest cuirass.
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The patient's target heart rate is 180, but he develops severe chest pain, shortness of breath, and diaphoresis at a heart rate of 135. What should be done?
A) Continue the test until the heart rate reaches 153, which will be the 85% needed for a valid test. B) Stop the test immediately. C) Give the patient a nitroglycerin tablet sublingually and then continue the test. D) Continue the test until the target heart rate is reached.