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Comparison of the Incidence of Arterial Pressure Line Insufficiency Between Polyethylene and Polyurethane Catheters
Kimito Minami1, Masahiro Kazawa1, Tatsutoshi Shimatani1
1Department of Critical Care Medicine, National Cerebral and Cardiovascular Center, Osaka, Japan.
Insights
Polyethylene arterial catheters significantly reduce arterial line insufficiency compared to polyurethane ones in critically ill patients. This finding is crucial for improving patient monitoring and outcomes in intensive care units.
Area of Science:
- Critical care medicine
- Vascular access devices
- Cardiovascular surgery
Background:
- Continuous arterial pressure monitoring is vital for managing critically ill patients.
- The choice of arterial catheter may influence monitoring accuracy and reliability.
- Previous studies have not compared different catheter materials for arterial line insufficiency.
Purpose of the Study:
- To compare the incidence of arterial line insufficiency between polyethylene and polyurethane arterial catheters.
- To determine if polyethylene catheters offer superior performance in maintaining arterial line patency.
Main Methods:
- A double-blinded, superiority, randomized controlled trial was conducted.
- Adult patients undergoing cardiovascular surgery and admitted to the ICU were enrolled.
- Patients received either polyethylene or polyurethane arterial catheters.
Main Results:
- Arterial line insufficiency occurred in 5.8% of patients with polyethylene catheters versus 28.6% with polyurethane catheters.
- The relative risk of insufficiency was significantly lower for polyethylene catheters (0.15; 95% CI, 0.05-0.48; p = 0.001).
- The trial was terminated early due to significant differences in primary outcomes.
Conclusions:
- Polyethylene arterial catheters are associated with a lower rate of arterial line insufficiency compared to polyurethane catheters.
- The findings suggest a material-based advantage for polyethylene in maintaining reliable arterial pressure monitoring.
- This evidence supports the use of polyethylene catheters to enhance the quality of care for critically ill surgical patients.
Objectives:
Continuous arterial pressure monitoring is crucial for critically ill patients. However, the impact of catheter type on arterial line insufficiency remains unexamined.
Design:
Double-blinded, superiority, randomized controlled trial.
Setting:
A cardiovascular center in Japan.
Patients:
Adult patients scheduled for elective cardiovascular surgery and postoperative admission to the ICU.
Interventions:
Patients were randomly assigned either polyethylene or polyurethane catheters.
Measurements And Main Results:
The outcome of interest was arterial line insufficiency, defined by one or more of the following four criteria: flattened or overdamped blood pressure waveform, sluggish free backflow of blood (> 2 s) when the stopcock was opened to the atmosphere, inability to draw blood from the arterial line, and inability to flush the catheter. The frequency of arterial line insufficiency was observed at the first noon after ICU admission. An interim analysis using the chi-square test was performed after half of the participants were enrolled, with early termination if p value of less than 0.005 based on the O'Brien-Fleming method. Interim analysis of 132 patients revealed significant differences in primary outcomes, leading to early termination of the trial. Arterial line insufficiency occurred in four of 69 patients (5.8%) with polyethylene catheters and 18 of 63 patients (28.6%) with polyurethane catheters (relative risk, 0.15; 95% CI, 0.05-0.48; p = 0.001).
Conclusions:
This study demonstrated a lower occurrence rate of arterial line insufficiency with polyethylene arterial catheters than polyurethane catheters.
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