Valsalva maneuver barrier mouthpiece during upper endoscopy

• Yoji Hirayama, MD,
• Hajime Yamazaki, MD, PhD,
• Shuhei Senda, MD,
• Tadayuki Hashimoto, MD, MPH

Affiliations

Yoji Hirayama, MD

Department of General Medicine, Hashimoto Municipal Hospital, Hashimoto, Japan

Hajime Yamazaki, MD, PhD

Department of General Medicine, Hashimoto Municipal Hospital, Hashimoto, Japan; Department of Community Medicine, Section of Clinical Epidemiology, Graduate School of Medicine, Kyoto University, Kyoto, Japan

Shuhei Senda, MD

Department of General Medicine, Hashimoto Municipal Hospital, Hashimoto, Japan

Tadayuki Hashimoto, MD, MPH

Department of General Medicine, Hashimoto Municipal Hospital, Hashimoto, Japan