Sheath placement in femoral artery during cardiac catheterization in children can influence pressure waveform

Area of Science:

• Cardiovascular Physiology
• Medical Device Impact
• Pediatric Cardiology

Background:

• External compression of the femoral artery is known to enhance pressure wave reflection.
• Cardiac catheterization procedures may inherently influence aortic pressure waveforms.

Purpose of the Study:

• To investigate the impact of femoral artery sheath placement on aortic pressure waveforms.
• To determine if cardiac catheterization influences central aortic pressure dynamics.

Main Methods:

• The study involved 21 pediatric patients undergoing cardiac catheterization with femoral artery sheath placement.
• Aortic pressure waveform changes were assessed using the b/a and d/a ratios from fingertip photoplethysmography.
• The d/a ratio signifies aortic pressure wave reflection, with lower values indicating enhancement.

Main Results:

• Femoral sheath placement did not significantly alter the b/a ratio (p=0.896), suggesting no change in aortic stiffness.
• A significant decrease in the d/a ratio was observed post-sheath placement (p=0.0003).
• This reduction in d/a ratio indicates enhanced aortic pressure wave reflection.

Conclusions:

• Placement of a femoral artery sheath enhances aortic pressure wave reflection.
• This procedural effect can alter the central aortic pressure waveform during cardiac catheterization.