MOCK Board Semester 2 Exam
2026 Exam Questions with 100%
Correct Answers | Latest Update
Which of the following would be the most likely cause of an absent
waveform during continuous arterial pressure monitoring via an A-line? -
🧠ANSWER ✔✔clot in catheter
Loss of a waveform during vascular pressure monitoring can be due to
many factors, with catheter occlusion by a clot probably the most common.
,If this occurs you should try to aspirate the clot with a syringe and then
flush the system with heparinized saline. Other causes of an absent
waveform are mainly equipment setup errors, i.e. stopcock off to patient,
loos connections, transducer not connected to monitor, monitor set to zero,
etc.
Prior to drawing an arterial blood sample, you note that a patient has
significantly elevated prothrombin and partial thromboplastin times (PT and
PTT). Which of the following actions would be appropriate in this situation?
- 🧠ANSWER ✔✔allow extra time after the procedure to assure hemostasis
High PTs or PTTs indicate abnormally slow clotting, in which case extra
time should be provided after the procedure to assure hemostasis at the
puncture site.
Which of the following arterial blood gas results would be most
representative of a patient who has advanced, but stable, COPD breathing
room air?
pH
,PaCO2 (torr)
PaO2 (torr)
A
7.37 41 55
B
7.38 59 56
C
7.41 45 79
D
7.50 56 57 - 🧠ANSWER ✔✔B
A stable COPD patient typically exhibits a chronic or compensated
respiratory acidosis with hypoxemia (ABG In compensated respiratory
acidosis, over time the kidneys increase bicarbonate levels, which offsets
the high PaCO2 and raises the pH back into the normal or near normal
range.
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2026. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
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STATEMENT. ALL RIGHTS RESERVED
, Which of the following describes the correct procedure for performing a
modified Allen's test? - 🧠ANSWER ✔✔compress both the radial and ulnar
arteries then release the ulnar artery
To perform the modified Allen's test: (1) the patient clenches his or her
hand into a tight fist while you apply pressure to both the radial and ulnar
arteries; (2) the patient then opens his or her hand without fully extending it
(the palm and fingers are blanched); and (3) you maintain pressure on the
radial artery while removing pressure on the ulnar artery. At this point you
should observe flushing of the entire hand, indicating the presence of
collateral circulation.
Which of the following blood gas sampling errors would tend to result in a
falsely low pH? - 🧠ANSWER ✔✔venous admixture
Preanalytic arterial blood gas sampling errors that would tend to result in a
falsely low pH include venous admixture and metabolic effects (failing to
analyze the sample ASAP). Air contamination (via lowering the PC02) and
use of excess liquid heparin (an alkaline solution) would tend to raise, not
2026 Exam Questions with 100%
Correct Answers | Latest Update
Which of the following would be the most likely cause of an absent
waveform during continuous arterial pressure monitoring via an A-line? -
🧠ANSWER ✔✔clot in catheter
Loss of a waveform during vascular pressure monitoring can be due to
many factors, with catheter occlusion by a clot probably the most common.
,If this occurs you should try to aspirate the clot with a syringe and then
flush the system with heparinized saline. Other causes of an absent
waveform are mainly equipment setup errors, i.e. stopcock off to patient,
loos connections, transducer not connected to monitor, monitor set to zero,
etc.
Prior to drawing an arterial blood sample, you note that a patient has
significantly elevated prothrombin and partial thromboplastin times (PT and
PTT). Which of the following actions would be appropriate in this situation?
- 🧠ANSWER ✔✔allow extra time after the procedure to assure hemostasis
High PTs or PTTs indicate abnormally slow clotting, in which case extra
time should be provided after the procedure to assure hemostasis at the
puncture site.
Which of the following arterial blood gas results would be most
representative of a patient who has advanced, but stable, COPD breathing
room air?
pH
,PaCO2 (torr)
PaO2 (torr)
A
7.37 41 55
B
7.38 59 56
C
7.41 45 79
D
7.50 56 57 - 🧠ANSWER ✔✔B
A stable COPD patient typically exhibits a chronic or compensated
respiratory acidosis with hypoxemia (ABG In compensated respiratory
acidosis, over time the kidneys increase bicarbonate levels, which offsets
the high PaCO2 and raises the pH back into the normal or near normal
range.
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2026. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
3
STATEMENT. ALL RIGHTS RESERVED
, Which of the following describes the correct procedure for performing a
modified Allen's test? - 🧠ANSWER ✔✔compress both the radial and ulnar
arteries then release the ulnar artery
To perform the modified Allen's test: (1) the patient clenches his or her
hand into a tight fist while you apply pressure to both the radial and ulnar
arteries; (2) the patient then opens his or her hand without fully extending it
(the palm and fingers are blanched); and (3) you maintain pressure on the
radial artery while removing pressure on the ulnar artery. At this point you
should observe flushing of the entire hand, indicating the presence of
collateral circulation.
Which of the following blood gas sampling errors would tend to result in a
falsely low pH? - 🧠ANSWER ✔✔venous admixture
Preanalytic arterial blood gas sampling errors that would tend to result in a
falsely low pH include venous admixture and metabolic effects (failing to
analyze the sample ASAP). Air contamination (via lowering the PC02) and
use of excess liquid heparin (an alkaline solution) would tend to raise, not
