Arterial catheterization and monitoring

Question 1

After the procedure it is advisable to remove any devices that have dorsiflexed the wrist because of concerns for what nerve injury?

Answer 1

Median nerve

Question 2

Allen’s test is performed before radial artery cannulation to determine whether ulnar collateral
circulation to the hand is adequate in case of radial artery thrombosis. Return of color in less than __ seconds indicates adequate collateral flow

Answer 2

5

Question 3

Return of color during Allen’s test in more than ___ seconds indicates inadequate collateral circulation.

Answer 3

10

Question 4

What alternative cannulation sites are available?

Answer 4

1) Ulnar
2) Brachial
3) Axillary
4) Femoral
5) Dorsalis pedis
6) Posterior tibial arteries

Question 5

Cannulation of the axillary artery is also relatively safe, but the __ side is preferred because of a lower incidence of embolization to the carotid artery.

Answer 5

Left

Question 6

What nerve injury results from repeat and immediate cuff reinflation?

Answer 6

Ulnar

Question 7

Is a property of the catheter-stopcock–transducer apparatus, is the frequency at which the monitoring system resonates and amplifies the signals it receives.

Answer 7

Natural frequency

Question 8

Reflects the rate of dissipation of the energy of a pressure wave.

Answer 8

Damping coefficient

Question 9

This system continues to oscillate for three or four cycles; it overestimates the systolic and underestimates the diastolic blood pressure.

Answer 9

Underdamped system

Question 10

This system settles to baseline slowly without oscillating; it underestimates the systolic and overestimates the diastolic blood pressure.

Answer 10

Overdamped system