Abstract
As noninvasive blood pressure monitoring technology has improved, the utilization of arterial cannulation has declined. However, invasive blood pressure monitoring can still provide important clinical information. This is particularly true in unstable, critical patients. Ultrasound-guidance has improved the success rate for successful first-attempts at cannulation. Caution should be used to perform this procedure using sterile technique, as infection is possible. The utilization of arterial blood gas has also declined, but this still remains the test of choice for patients with oxygenation difficulties and severe acid-base imbalance.
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