Triboelectric charging of polytetrafluoroethylene antithrombotic catheters
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This study proposes that a polytetrafluoroethylene (PTFE) electret tube charged by frictional electricity can prevent the solidification of the indwelling catheter in blood vessels. Coagulation in intravascular indwelling catheters may discontinue the treatment because of thrombus-derived bacteria–adhesion infections or poor blood removal. Current commercially available intravascular catheters lack complete antithrombotic measures, even with heparin or urokinase antithrombotic coatings. Herein, we tested the effectiveness of an antithrombotic treatment that prevents coagulation using a static electric charge on the interior of the PTFE tube via the triboelectric effect by rubbing the tube’s inner wall with a round glass rod. The anticoagulation properties were evaluated by enclosing a sample of blood in an electret tube and observing the coagulase adhering to the inner wall using a microscope. To confirm the effectiveness of this treatment, the charge–distribution on the inner surface of the electret tube was measured, surface irregularities were observed, and the elements on the surface were analyzed. The surface potential inside the electret tube was − 366.4 V, which proved effective for an antithrombotic treatment, as it discouraged coagulation, and the triboelectric charging process caused neither surface element denaturation nor significant surface irregularities. The nearly uniform negative surface charge on the inside of the tube was responsible for the antithrombotic effect because no surface irregularities or change in the surface element denaturation was observed. Triboelectrically charged PTFE electret tubes are highly useful for intravascular indwelling catheters.
KeywordsElectret Intravascular indwelling catheter Triboelectric charging Anticoagulant
We would like to take this opportunity to thank Kotono Ohki, Natsuki Hada, Hayato Mitani, Takanori Tanabe, Shinya Sudo, and Nozomu Souma from Tokyo University of Technology, Department of Clinical Engineering for providing their much appreciated support in conducting this research.
There are no financial relations with the organization that supported the study.
Compliance with ethical standards
Conflict of interest
The authors declare that they have no conflict of interest.
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