Establishment of a Guinea Pig Model for Endoscopic Anatomy and Middle Ear Surgery Training
10.3969/j.issn.1006-7299.2024.04.011
- VernacularTitle:豚鼠耳内镜解剖及手术训练模型的建立
- Author:
Pei XIE
1
,
2
;
Bingqian YANG
;
Xilin YANG
;
Hua LIAO
;
Hua LIU
Author Information
1. 华北理工大学(唐山 063000)
2. 武汉大学人民医院耳鼻咽喉头颈外科
- Keywords:
Guinea pig;
Ear endoscopy;
Animal training model;
Middle ear anatomy
- From:
Journal of Audiology and Speech Pathology
2024;32(4):338-341
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the feasibility of constructing an animal model for training of otoscopic anatomy and surgical operation using living guinea pigs.Methods Eight healthy adult guinea pigs were used as ex-perimental animals to construct a model of endoscopic operation by opening the upper tympanic cavity and abrading the upper wall of the external acoustic meatus to establish a space for endoscopic observation and operation.The an-atomical opening of the temporal bone and basic surgical steps were performed by the same resident on eight guinea pigs.The resident assessed the difficulty and completion of the endoscopic operation and measured various dimen-sions,including the anteroposterior and superior/inferior diameters of the mastoid process,the posterolateral wall of the upper tympanic cavity,and the upper wall of the external acoustic meatus,as well as the maximal depth of entry of the endoscope.Results The fine structures of guinea pig tympanic chamber were clearly displayed under otoen-doscopy.Except for the two steps of free preservation of the chorda tympani nerve and exposure of the stapes after removal of the ossicles,the other steps,such as separation of the tympanic membrane from the malleus,exposure of the malleus-anvil complex,removal of the cochlea shell to observe the cochlea axis,and exposure of the tympanic segment of the facial nerve under the endoscope,were all easily accomplished.The anterior and posterior diameters of the mastoid after opening were 3.56±0.21 and 3.89±0.16 mm,respectively,and the anterior and posterior di-ameters of the upper tympanic cavity and the upper wall of the external acoustic meatus after opening were 5.60±0.09 and 6.02±0.10 mm,respectively.The maximum depth of entry of the otoscopic endoscope was 15.14±0.24 mm.Conclusion Using guinea pig as an animal model for otoscopic surgery training can provide a more realis-tic surgical experience,which is helpful for beginners to be trained in the basic surgical skills of otoscopic surgery and otoscopic anatomy.
