Self-Expandable Retainer for Endoscopic Visualization in the External Auditory Canal: Proof of Concept in Human Cadavers

Kim, Yehree; Kang, Jeon Min; Song, Ho Young; Kang, Woo Seok; Park, Jung Hoon; Chung, Jong Woo

doi:10.3390/app10051877

Cited by 4 publications

(3 citation statements)

References 28 publications

(32 reference statements)

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“…Surgical instruments that provide adequate control of bleeding, perhaps, for example, with cauterization ability added to suction–dissection, might obviate the need for infiltration. Coupled with an alternative strategy for removing hairs from the field 20 and avoidance of ear packing, 21 around 5-10 minutes could be saved without adversely affecting outcome. Independently from this study, we informally evaluated a commercially available 1-handed sterilizable ear hair trimmer, but found that the hairs were not trimmed sufficiently short and the time saved was negligible.…”

Section: Discussionmentioning

confidence: 99%

Time Flow Study to Assess Opportunities to Improve Efficiency in Endoscopic Tympanoplasty

Swarup¹,

Chayaopas²,

Eastwood

et al. 2021

Int Adv Otol

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BACKGROUND To characterize the workflow during transcanal totally endoscopic tympanoplasty by recording the time and instrumentation used for different steps in the procedure. This analysis aims to identify aspects of instrumentation and surgical technique that could be modified to improve surgical efficiency. METHODS Thirty-one endoscopic tympanoplasty procedures were observed at a single academic center. Patient age ranged from 2.7 to 17.8 years. The procedure was separated into distinct steps. The duration in minutes and the instruments used were recorded by an independent observer. RESULTS Raising the tympanomeatal flap (median 9.82 minutes) and positioning the graft and replacing the flap (median 9.13 minutes) took significantly longer than all other steps (P > .05, Wilcoxon method). Teaching a trainee significantly increased step duration by a total of 32.8 minutes (P > .05, Wilcoxon method). There was no correlation between age of the patient, side of the ear, surgical technique, or graft type, and duration of surgery. Suction instruments with a functional tip (dissector or knife tip) were most commonly used to dissect and maneuver soft tissue while maintaining the surgical field clear of blood. CONCLUSION As elevation of the tympanomeatal flap and graft placement are the most time-consuming steps in endoscopic tympanoplasty, especially for surgical trainees, surgical efficiency could most dramatically be enhanced by modification of instrumentation or technique to facilitate these steps. Modification of simpler steps such as hair trimming and ear canal packing have less potential for shortening surgical duration.

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Section: Discussionmentioning

confidence: 99%

Time Flow Study to Assess Opportunities to Improve Efficiency in Endoscopic Tympanoplasty

Swarup¹,

Chayaopas²,

Eastwood

et al. 2021

Int Adv Otol

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“…Numerical studies show optimization potential for stent development. A self-expandable structure is described in [37]. The complexshaped stent is developed to reduce endoscopic lens cleaning during internal ear visualization.…”

Section: Introductionmentioning

confidence: 99%

Everting of tubular net structures based on Shape Memory Alloys

et al. 2021

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Foldable technical structures can be used to provide a temporary additional volume. In nature, a tubular folding application is the extension of the snail eye. The present study uses this approach. A transformation into a technical application is only successful if the high eversion loads are considered. The study aims to develop a method to realize such structures based on a metallic wire net structure. The tube consists of Shape Memory Alloy (SMA) pieces connected by developed crimp elements produced by additive manufacturing. Additive manufacturing was used to provide a fast and effective way to make several crimp element geometries available to define a preferred variant. In a preliminary building study, the printing parameters for crimp element production were improved. The tubular structure development is assisted by numerical simulation of the eversion process. The SMA material model parameters were identified with experimental tension tests. A feasible way to connect additively manufactured crimp elements with SMA wire was found within a joining method study. Tension tests of the connections protect against pull-out failure. The eversion process was investigated using a high-speed camera system. Multiple eversion of the developed structure is possible without failure.

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“…Other interesting topics of the special materials used in medical field cover the following: Surface Analysis of 3D (SLM) Co-Cr-W Dental Metallic Materials [5], Laser Induced Method to Produce Curcuminoid-Silanol Thin Films for Transdermal Patches Using Irradiation of Turmeric Target [6], Corrosion-Resistance Analysis of HA Layer Deposited through Electrophoresis on Ti4Al4Zr Metallic Substrate [7], Magnetic Abrasive Finishing of Beta-Titanium Wire Using Multiple Transfer Movement Method [8], Effect of Alkyl Structure (Straight Chain/Branched Chain/Unsaturation) of C18 Fatty Acid Sodium Soap on Skin Barrier Function [9] or Self-Expandable Retainer for Endoscopic Visualization in the External Auditory Canal: Proof of Concept in Human Cadavers [10].…”

mentioning

confidence: 99%