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Korean J Anesthesiol > Volume 43(1); 2002 > Article
Korean Journal of Anesthesiology 2002;43(1):10-14.
DOI: https://doi.org/10.4097/kjae.2002.43.1.10   
The Effect of the Radius and Longitude of a Catheter in Continuous Arterial Blood Pressure Monitoring.
Sung Yong Park, Sou Ouk Bang, Young Lan Kwak, Young Jun Oh, Hyuck Rae Cho, Yong Woo Hong
1Department of Anesthesiology, Yonsei University College of Medicine, Seoul, Korea. ylkwak@yumc.yonsei.ac.kr
2Department of Anesthesiology, Ajou University College of Medicine, Suwon, Korea.
Abstract
BACKGROUND
Continuous arterial blood pressure monitoring is a highly effective method in an operation and the intensive care unit. However, the accuracy of the monitoring system could be influenced by the radius and longitude of the catheter. This study was executed to examine the effects of the radius and longitude of a catheter.
METHODS
Forty-two pediatric patients scheduled to undergo open heart surgery were selected. After induction of anesthesia, the radial artery pressure was measured by a 22-gauge (1 inch) catheter and the femoral artery pressure was measured by a 20-gauge (1.16 inch) catheter, 22-gauge catheter and 20-gauge (12 cm) catheter in succession. Influences of the radius and longitude were analysed respectively. All values are expressed as mean +/- SD and analysed using the paired t-test; P < 0.05 was considered significant.
RESULTS
The systolic pressure of the 20-gauge (1.16 inch) catheter was higher than that of the 22- gauge (1 inch) catheter. The systolic pressure of the 20-gauge (1.16 inch) catheter was higher than that of the 20-gauge (12 cm) catheter. Mean and diastolic pressures were low in the 20-gauge (1.16 inch) catheter, compared with the 20-gauge (12 cm) catheter.
CONCLUSIONS
Shorter and/or larger radius catheters could increase the pulse pressure in pediatric patients.
Key Words: Arterial blood pressure; arterial catheters
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