Abstract
Objective: In recent years, there have been some reports of complications suspected to be caused by the hydrophilic coating material polyvinylpyrrolidone (PVP) that peeled off from the device after endovascular treatment. We tried to detect PVP that has peeled off during carotid artery stenting and examine preventive measures.
Methods: Three cases treated with Carotid Guardwire PS were examined. The blood sucked when the inner catheter was removed after guiding the guiding catheter and the blood sucked before deflating the Guardwire were filtered and investigated. The remaining debris was examined using a Fourier transform infrared (FTIR) spectroscopy to see if it matched the peak value of PVP.
Results: Small debris, which was macroscopically considered to be a foreign substance, was observed in the blood sucked when the inner catheter was removed. When examined by the FTIR spectroscopy, a component with the same peak value as PVP was detected.
Conclusion: In carotid artery stenting, a foreign body that seems to be PVP was detected in the blood when the inner catheter was removed. In order to reduce PVP scattering, it is necessary to take measures such as regurgitating blood when operating a device with a small lumen difference such as an inner catheter.
