Lower Patient Height and Weight Are Predisposing Factors for Complex Radial Arterial Catheterization.

Area of Science:

• Vascular Access Procedures
• Medical Ultrasound Applications
• Patient Safety in Interventions

Background:

• Radial artery catheterization for invasive blood pressure monitoring often relies on palpation.
• Ultrasound is typically a secondary tool for radial artery catheterization, used after failed palpation attempts.
• Primary ultrasound guidance may offer advantages over palpation for radial artery catheterization.

Purpose of the Study:

• To identify factors contributing to difficult radial artery catheterization.
• To evaluate patient characteristics associated with challenging radial artery cannulation.
• To determine predictors of prolonged radial artery catheterization time.

Main Methods:

• Radial artery ultrasound assessments were conducted pre-operatively in patients requiring invasive blood pressure monitoring.
• Radial artery catheterization was performed by operators blinded to ultrasound findings.
• Patients were categorized into uncomplicated (one attempt) and difficult (multiple attempts) catheterization groups.

Main Results:

• Patients with difficult radial artery catheterization had significantly lower body weight, height, and body surface area (BSA).
• Internal radial artery diameters were significantly smaller in the difficult catheterization group.
• Lower body weight, BMI, and BSA, along with reduced radial artery diameter, were associated with prolonged cannulation time.

Conclusions:

• Radial artery catheterization via palpation can be challenging in adult patients with lower body weight and height due to smaller arterial dimensions.
• Routine ultrasound use in patients with these characteristics may decrease first-attempt failures.
• Early ultrasound application can prevent procedural delays and reduce patient discomfort during radial artery catheterization.