Send to

Choose Destination
PLoS One. 2018 Jul 18;13(7):e0200749. doi: 10.1371/journal.pone.0200749. eCollection 2018.

A novel one-step lens cleaning device using air and water flow for endoscopic surgery.

Author information

Department of General Surgical Science, Gunma University, Graduate School of Medicine, Maebashi, Gunma, Japan.
Big Data Center for Integrative Analysis, Gunma University Initiative for Advance Research, Maebashi, Gunma, Japan.


In a surgical operation requiring endoscopy, it is essential to obtain a clear endoscopic view. However, it is often disturbed by the contamination on the lens during the surgery. No device can clean the lens surface simply and completely. Many surgeons are hampered by the impaired view and the distraction by the repeated cleaning of the lens. Therefore, we developed a novel endoscope cleaning device to address this problem. The device was made of 3D-printed rubber-like plastic. It contains a syringe filled with saline and an aspiration system. It would be used intraoperatively to wash the lens surface in a few seconds with rapid flow of water and air. The cleaning ability of the device was evaluated using mayonnaise with adenosine triphosphate (ATP) as a model contaminant. The gauze-wiping maneuver was selected as control. After each maneuver, the clarity of the endoscopic view was evaluated, and residual contaminants were assessed quantitatively with ATP assay. The cleaning device obtained a crisp and clear view and eliminated the contaminant on the lens every time after a single cleaning maneuver. The gauze-wiping maneuver required for the lens to be wiped at least three times to obtain a clear view, and even then, some contaminants remained. Repeated contamination and cleaning using gauze led to accumulation of contaminants on the lens, which resulted in difficulty in cleaning the lens as the operation proceeded. The cleaning device did not show such accumulation. Our novel cleaning device with air and water flow has been shown to wash out the lens contaminants completely and immediately in a simple manner. It is expected to improve the safety and cost-effectiveness of endoscopic surgery.

[Indexed for MEDLINE]
Free PMC Article

Conflict of interest statement

Hironori Tatsuki, Takehiko Yokobori, Chika Katayama, Ryuji Kato, Ryo Takahashi, Katsuya Osone, Takahiro Takada, Reina Yajima, Yoko Motegi, Hiroomi Ogawa, Takaaki Fujii, Ken Shirabe, and Hiroyuki Kuwano have no conflict of interest to disclose. Takayuki Asao has a patent PCT/JP2017/005014 pending to Gunma University, National University Corporation, Japan. This does not alter our adherence to PLOS ONE policies on sharing data and materials. Other authors have no conflict of interest or financial ties to disclose.

Supplemental Content

Full text links

Icon for Public Library of Science Icon for PubMed Central
Loading ...
Support Center