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Kau, Ryan L.

Mayo Clinic

Mayo Clinic Hospital

Citations 2

Comparison of 3 mm versus 4 mm rigid endoscope in diagnostic nasal endoscopy
Neel, Gregory S., Kau, Ryan L., Bansberg, Stephen F. , Lal, Devyani

World Journal of Otorhinolaryngology - Head and Neck Surgery | March 9, 2017 | Volume: 3 | Issue: 1 | Pages: 32-36

10.1016/j.wjorl.2017.02.006 Get It

ObjectiveCompare nasal endoscopy with 3 mm versus conventional 4 mm rigid 30° endoscopes for visualization, patient comfort, and examiner ease.MethodsTen adults with no previous sinus surgery underwent bilateral nasal endoscopy with both 4 mm and 3 mm endoscopes (resulting in 20 paired nasal endoscopies). Visualization, patient discomfort and examiner's difficulty were assessed with every endoscopy. Sino‐nasal structures were checked on a list if visualized satisfactorily. Patients rated discomfort on a standardized numerical pain scale (0–10). Examiners rated difficulty of examination on a scale of 1–5 (1 = easiest).ResultsVisualization with 3 mm endoscope was superior for the sphenoid ostium (P = 0.002), superior turbinate (P = 0.007), spheno‐ethmoid recess (P = 0.006), uncinate process (P = 0.002), cribriform area (P = 0.007), and Valve of Hasner (P = 0.002). Patient discomfort was not significantly different for 3 mm vs. 4 mm endoscopes but correlated with the examiners' assessment of difficulty (r = 0.73). The examiner rated endoscopy with 4 mm endoscopes more difficult (P = 0.027).ConclusionsThe 3 mm endoscope was superior in visualizing the sphenoid ostium, superior turbinate, spheno‐ethmoid recess, uncinate process, cribriform plate, and valve of Hasner. It therefore may be useful in assessment of spheno‐ethmoid recess, nasolacrimal duct, and cribriform area pathologies. Overall, patients tolerated nasal endoscopy well. Though patient discomfort was not significantly different between the endoscopes, most discomfort with 3 mm endoscopes was noted while examining structures difficult to visualize with the 4 mm endoscope. Patients' discomfort correlated with the examiner's assessment of difficulty.
Giant Fibrolipoma of the Esophagus
Kau, Ryan L., Patel, Alpen B., Hinni, Michael L.

Case Reports in Otolaryngology | February 20, 2012 | Volume: 2012 | Issue: No issue available | Pages: 1-3

10.1155/2012/406167 Get It

Benign tumors of the esophagus are uncommon, representing <0.5% of esophageal tumors. Fibrolipomas are a subset of benign fibrovascular tumors, which present with dysphagia, odynophagia, and substernal fullness. These intraluminal tumors can become elongated and molded into a long pedunculated polyp by constant peristaltic movements. They can cause esophageal obstruction if large and long enough and can cause asphyxiation if they become lodged into the glottis. A barium swallow is the main diagnostic tool; treatment is surgical via a transoral, transcervical, or transthoracic approach. We report the excision of a large esophageal fibrolipoma through a transoral laser microsurgical approach.