Abstract
Noninvasive blood pressure measurements are less accurate than direct measurements but arterial catheterization for direct blood pressure monitoring can be challenging especially in patients with a nonpalpable pulse. The purpose of this study is to describe a novel technique of locating the dorsal pedal arterial pulse using a portable ultrasonic Doppler for arterial catheter placement. Using the described technique in anesthetized dogs and cats with strong (n=13) to weak dorsal pedal pulses (n=6), the overall success rate of arterial puncture was 70% (19/27) with successful catheterization in 53% (10/19) of those. The overall success rate of arterial catheterization was 37% (10/27). The pulse strength did not significantly affect the success rate. Neither were patient weight, blood pressure, heart rate, and premedication significantly different between the 2 groups. This study describes a novel technique for locating the dorsal pedal artery for arterial catheterization. Having another technique of pulse detection may increase the likelihood of arterial catheter placement for direct blood pressure monitoring and aid in arterial puncture for obtaining a sample for blood gas analysis in critical patients.
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