PURPOSE: To determine the perturbation effect in the tissue downstream from surface layers of lesions located in the air/tumor-tissue interface of larynx using 6MV photon beam. MATERIALS AND METHODS: Thermoluminescent dosimeters(TLDs). Were embedded at 3 measurement locations in slab no.7 of a humanoid phantom and exposed to forward and backward direction using various field sizes(4X4cm2 - 15X15 cm2). RESULTS: At the air/tissue interface, forward dose perturbation factor(FDPF) is about 1.085 with 4X4 cm2, 1.05 with 7X7 cm2, 1.048 with 10X10cm2, and 1.041 with 15X15cm2. Backscatter dose perturbation factor(BDPF) is about 0.99 with 4X4cm2, 0.981 with 7X7cm2, 0.956 with 10X10cm2 and 0.97 with 15X15cm2 . CONCLUSION: FDPF is greater as field size is smaller. And FDPF is smaller as the distance is further from the air/tissue interface.
Larynx

PURPOSE: To determine the perturbation effect in the tissue downstream from surface layers of lesions located in the air/tumor-tissue interface of larynx using 6MV photon beam. MATERIALS AND METHODS: Thermoluminescent dosimeters(TLDs). Were embedded at 3 measurement locations in slab no.7 of a humanoid phantom and exposed to forward and backward direction using various field sizes(4X4cm2 - 15X15 cm2). RESULTS: At the air/tissue interface, forward dose perturbation factor(FDPF) is about 1.085 with 4X4 cm2, 1.05 with 7X7 cm2, 1.048 with 10X10cm2, and 1.041 with 15X15cm2. Backscatter dose perturbation factor(BDPF) is about 0.99 with 4X4cm2, 0.981 with 7X7cm2, 0.956 with 10X10cm2 and 0.97 with 15X15cm2 . CONCLUSION: FDPF is greater as field size is smaller. And FDPF is smaller as the distance is further from the air/tissue interface.
Larynx

No abstract available.
Larynx*

No abstract available.
Larynx*

Acute laryngeal trauma is a great challenge for the otoloaryngologist. Early recognition, accurate evaluation and proper treatment may be crucial to immediate survival and long-term function. Objective:To describe an endoscopically-guided open reduction and adaptation plate fixation of an acute laryngeal fracture secondary to vehicular accident. Methods: a. Study Design: Surgical Innovation/ Case Report b. Setting:Tertiary Hospital in Metro Manila Results: Post-operative follow-up showed good vocal fold function and arytenoid position, with no food regurgitation, signs of aspiration or penetration on fiberoptic endoscopic evaluation of swallowing Conclusion: Endoscopic guidance allows higher magnification minimizing iatrogenic mucosal damage during manipulation. (Author)
LARYNX

We report a case of tracheopathia osteoplastica(TO) that.involvedboth larynx and tracheobronchus. On CTscans, the laryngeal and tracheobronchial cartilages were thickened with irregular calcification. Multiple nodules with or without calcification were seen protruding into the lumen from the anterior and lateral walls.
Cartilage ; Larynx

We report a case of tracheopathia osteoplastica(TO) that.involvedboth larynx and tracheobronchus. On CTscans, the laryngeal and tracheobronchial cartilages were thickened with irregular calcification. Multiple nodules with or without calcification were seen protruding into the lumen from the anterior and lateral walls.
Cartilage ; Larynx

No abstract available.
Amyloidosis* ; Larynx*

Objective: To design an instrument for steadying instrument handling during microlaryngeal surgery using an operating laryngoscope. Method: Our device design takes its cue (pun intended) from professional billiards players like our very own Efren "Bata" Reyes. The laryngeal tiririt (bridge or rake) draws inspiration from the billiards bridge (locally known as tiririt) used to extend the player's reach when the cue ball is too far to make an accurate shot. Setting: The laryngeal tiririt was used and tested by senior residents in microlaryngeal surgeries done in our institution. Result: The laryngeal tiririt greatly improved the accuracy required in laryngeal surgeries without adding up huge set up or expensive equipment. (Author)
LARYNGOSCOPES LARYNX

Background. Simulators in laryngology are an essential part of training. They provide an avenue for medical students and resident trainees to practice valuable psychomotor skills outside the realm of an actual patient encounter - thereby decreasing the risk of possible patient morbidity. Herein we present three locally manufactured simulation devices that can be used to train residents in laryngology procedures.

Objective. To present three simulation platform devices (Laser Box, Flexible Endoscopy Simulation, Thiel Cadaver Chair) and their applications in simulation-based learning

Methods. The Laser Box, Flexible Endoscopy Simulation, and Thiel Cadaver Chair were manufactured by outside parties designated as 'Laser Machinists'.

Results. Ten (10) units of the Laser Box, two (2) units of the Thiel Cadaver Chair, and two (2) units of the Flexible Endoscopy Simulation were constructed. They were used in a laryngology postgraduate course in our institution to teach the participants on endoscopies and laser phonosurgery.

Conclusion. Simulation for otolaryngologic procedures should be an essential part of training. The learning curve for procedures such as laryngoscopy and laser phonosurgery can be addressed with the production of simulation platforms. Most institutions in the Philippines still adopt the "see one, do one, teach one" approach, which lacks standardization and puts patients at risk. Various task trainers for laser phonosurgery and flexible endoscopy have been reported in the literature, but there seems to be no published data on the use of a cadaver chair for simulation. In the COVID-19 era, aside from being excellent teaching tools, simulation platforms derive their importance in helping train residents, educate medical students, and review consultants - maximizing skill development - and thereby decreasing repeated attempts, and indirectly, exposure to the SARS-CoV-2. Future validation studies are required for the models, with the eventual long-term goals to further standardize training, increase patient safety and incorporate a simulation-based curriculum for the specialty locally.