Laser-Calibrated System for Transnasal Fiberoptic Laryngeal High-Speed Videoendoscopy.
Dimitar D Deliyski, Milen Shishkov, Daryush D Mehta and 5 others
PMID 31383516WHAT IT FOUND
A green laser grid fitted to a flexible laryngoscope is designed to provide calibrated horizontal and vertical measurements in high-speed vocal fold recordings.
It was tested only for visibility in one male subject.
Key findings
01A laser-calibrated transnasal flexible endoscopy system compatible with high-speed videoendoscopy is designed to provide calibrated measurements on horizontal and vertical planes.
02The laser points were visible and clear in recordings from one male subject.
03The estimated laser irradiance was within the stated safety limits, and red-channel contamination was low.
STILL TO COME
How it was doneWhat they foundWhat it means for SLPs
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What it does not show
The human test was only one male subject, so it does not show performance in female subjects or across patients. Visibility was judged subjectively, and no accuracy, reliability, or clinical measurement validation was reported. The paper reports system design and bench measurements, not patient outcomes or treatment effects. Automated calibrated measurement software and a full calibration protocol are described as future work, so absolute measurements were not demonstrated in patients.
The easy way to misread this
Do not conclude that this laser-calibrated endoscope improves voice assessment or treatment. It was tested for visibility in one male subject and on bench targets, with no patient outcomes or measurement accuracy results.