Related Experiment Video
Updated: Jan 20, 2026

Author Spotlight: Insights into Visual Cortex Research Through Wide-View fMRI Mapping
Published on: December 8, 2023
The cheek expander enables tonsillectomy with a wide view and working space
Takashi Anzai1, Atsunobu Tsunoda1, Shori Tajima1
1Department of Otorhinolaryngology, Juntendo University Faculty of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo 113-8421, Japan.
A novel cheek retractor improves surgical visualization during tonsillectomy, a common ENT procedure. This device widens the surgical field and prevents mouth corner injuries, enhancing patient safety.
Area of Science:
- Otolaryngology
- Surgical Innovation
Background:
- Tonsillectomy is a frequent otolaryngological surgery.
- Achieving a clear surgical field and preventing oral trauma are persistent challenges.
Purpose of the Study:
- To investigate the efficacy of a cheek retractor combined with a Davis mouth gag for tonsillectomy.
- To evaluate the advantages of this device in improving surgical access and safety.
Main Methods:
- A prospective study of 13 tonsillectomies (7 adults, 6 children) using the cheek retractor.
- The device was applied after a Davis mouth gag, and oral angle diameter was measured pre- and post-placement.
Main Results:
- The cheek retractor increased the visual field width by 1.6 times, providing a significantly improved surgical field.
- The device offered full and safe mouth coverage, preventing lip injury.
Conclusions:
- The cheek retractor is a valuable tool for enhancing the working space during tonsillectomy.
- This innovation contributes to safer and more efficient tonsillectomy procedures.
Related Concept Videos
Econometric Views (EViews)
State Space Representation
Consider an RLC circuit, a...
Space Trusses
At the core of a space truss lies the fundamental unit known as the tetrahedron. This structure is composed of six members that form a three-dimensional shape...
Cranial Bones: Lateral View
The temporal bone forms the lower lateral side of the skull. The temporal bone is subdivided into several regions. The flattened upper portion is the squamous portion of the temporal bone. Below this area and projecting anteriorly is the zygomatic process of the temporal bone, which forms the posterior portion of the zygomatic arch. Posteriorly is the mastoid portion of the temporal bone. Projecting...
Transfer Function to State Space
In an RLC...
State Space to Transfer Function
The transformation process begins with the state-space representation, characterized by the state equation and the output equation. These equations are typically represented as:

