Impression Material Foreign Bodies of the Middle Ear and Ear Canal

1996 ◽  
Vol 115 (2) ◽  
pp. P204-P204
Author(s):  
Charles A. Syms ◽  
Ralph A. Nelson
Keyword(s):  
Middle Ear ◽  
Foreign Bodies ◽  
Ear Canal ◽  
Impression Material

scholarly journals Surgical Removal of Hearing Aid Earmold Impression Material in the Middle Ear

2021 ◽  
pp. 014556132110091
Author(s):  
Hwabin Kim ◽  
Sanghoon Kim ◽  
Hye-Jin Park ◽  
Sung-Won Choi
Keyword(s):  
Foreign Body ◽  
Middle Ear ◽  
Inflammatory Reaction ◽  
Hearing Aids ◽  
Rare Case ◽  
Foreign Bodies ◽  
Surgical Removal ◽  
Impression Material ◽  
Tympanic Membrane Perforations ◽  
Fitting Hearing Aids

When fitting hearing aids, patients are required to make an earmold impression material for device fixation. It usually causes no problems, although in rare cases, the earmold passes through the middle ear through tympanic membrane perforations. 1 – 3 Foreign bodies may cause a delayed inflammatory reaction and deterioration of aeration, especially in the Eustachian tube. Herein, we report a rare case of earmold impression material as a foreign body in the middle ear that required surgical removal.

scholarly journals A Child Presenting with a Bullet in the Middle Ear: Case Report

2012 ◽  
Vol 5 ◽  
pp. CCRep.S8214
Author(s):  
Patorn Piromchai ◽  
Somchai Srirompotong ◽  
Piyawadee Lertchanaruengrith ◽  
Robert Mills
Keyword(s):  
Foreign Body ◽  
Middle Ear ◽  
External Auditory Canal ◽  
Foreign Bodies ◽  
Community Hospital ◽  
Metallic Foreign Body ◽  
Ear Canal ◽  
Case Presentation ◽  
Adults And Children ◽  
Otoscopic Examination

Introduction Foreign bodies in the external auditory canal are common in both adults and children. Removal of the foreign body requires skill, but is usually successfully performed in the emergency department. We report a case of a child with a bullet in ear canal which was pushed into the middle ear during an attempt to remove it. Case Presentation A 6-year-old Thai boy went to the community hospital with his parents, who reported that their child had pushed a bullet into his ear. Otoscopic examination revealed a metallic foreign body in his external auditory canal. The first attempt to remove the foreign body failed and the child was referred to an otolaryngologist. We found that the tympanic membrane was ruptured, with granulation tissue in the middle ear and the bullet was located in the hypotympanum. The foreign body was removed via a post-auricular approach. Conclusion Removal of a foreign body from external auditory canal is an essential skill for physicians. Careful removal can prevent further trauma and complications. When the first attempt fails, referral to an otolaryngologist is recommended.

Impression-material foreign bodies of the middle ear and external auditory canal

1998 ◽  
Vol 119 (4) ◽  
pp. 406-407 ◽  
Author(s):  
Ltc Charles A. Syms Usaf ◽  
Ralph A. Nelson
Keyword(s):  
Middle Ear ◽  
External Auditory Canal ◽  
Foreign Bodies ◽  
Impression Material

Difficult button battery ear foreign body removal: the magnetic solution

2014 ◽  
Vol 129 (1) ◽  
pp. 93-94 ◽  
Author(s):  
W Nivatvongs ◽  
M Ghabour ◽  
G Dhanasekar
Keyword(s):  
Foreign Body ◽  
Foreign Bodies ◽  
Ear Canal ◽  
Foreign Body Removal ◽  
Button Battery ◽  
Operating Theatres

AbstractBackground:Removing a button battery from the ear can be a tricky and challenging procedure.Method and Results:We describe the innovative use of a magnetic telescopic rod to successfully remove a button battery from the ear canal of a nine-year-old boy.Conclusion:We propose that this equipment should be available in ENT clinics and operating theatres to be used for removing foreign bodies made from ferrous materials.

Aerobic and Anaerobic Bacteria in the Middle ear and ear Canal in Acute Otitis Media

1982 ◽  
Vol 93 (sup386) ◽  
pp. 100-102 ◽  
Author(s):  
J. Luotonen ◽  
A. M. M. Jokipii ◽  
P. Sipilä ◽  
J. Väyrynen ◽  
L. Jokipii ◽  
...  
Keyword(s):  
Otitis Media ◽  
Middle Ear ◽  
Anaerobic Bacteria ◽  
Acute Otitis Media ◽  
Ear Canal ◽  
Aerobic And Anaerobic

Acute labyrinthitis and meningitis of the ear origin

1930 ◽  
Vol 26 (9) ◽  
pp. 941-941
Author(s):  
B. Goland
Keyword(s):  
Foreign Body ◽  
Tympanic Membrane ◽  
Foreign Bodies ◽  
Family Doctor ◽  
Ear Canal ◽  
Deep Wound ◽  
The Right

Abstracts. Otorhinolaryngology. Prof. Uffenrode (D. med. Woch. 1929. No. 25.) describes 2 very interesting cases from his practice. 1. To remove peas from the ears of a 5-year-old child, a family doctor used tweezers. In view of the child's strong anxiety, chlorine ethyl anesthesia was applied, but the removal of foreign bodies from the ears was not possible; deep wound in the right ear canal. Secondary chlorine - ethyl anesthesia; the foreign body was removed from the left ear by washing, from the right ear it was not possible. The next day, an otorhinolaryngologist will remove the foreign body from the right ear; a wound of the tympanic membrane was established.

Multiple Frequency Tympanometry

1993 ◽  
Vol 36 (1) ◽  
pp. 178-185 ◽  
Author(s):  
Janet E. Shanks ◽  
Richard H. Wilson ◽  
Nancy K. Cambron
Keyword(s):  
Phase Angle ◽  
Phase Difference ◽  
Middle Ear ◽  
Multiple Frequency ◽  
Ear Canal ◽  
Sweep Frequency ◽  
Difference Curve ◽  
Angle Measurements ◽  
Rectangular Form ◽  
Acoustic Admittance

Three methods for compensating multiple frequency acoustic admittance measurements for ear canal volume were studied in 26 men with normal middle ear transmission systems. Peak compensated static acoustic admittance (| y |) and phase angle (ø) were calculated from sweep frequency tympanograms (226–1243 Hz in 113 Hz increments). Of the procedures used to compensate for volume in rectangular form, the ear canal pressure used to estimate volume had the largest effect on the estimate of middle ear resonance. Median resonance was 800 Hz for admittance measurements compensated at 200 daPa versus 1100 Hz for measurements compensated at –350 daPa. The remaining two methods, compensation of susceptance only versus both susceptance and conductance and compensation using the minimum volume versus separate volumes at each frequency, did not affect estimates of middle ear resonance. Estimates of middle ear resonance from compensated phase angle measurements also were compared with estimates of resonance from admittance and phase difference curves. although resonance could not be estimated from the phase difference curve, resonance estimated from the admittance difference curve agreed with the estimate from compensated phase angle.

3D Finite Element Modeling of Blast Wave Transmission From the External Ear to a Spiral Cochlea

2021 ◽  
Author(s):  
Marcus Brown ◽  
John Bradshaw ◽  
Rong Z. Gan
Keyword(s):  
Finite Element ◽  
Middle Ear ◽  
Basilar Membrane ◽  
Transverse Motion ◽  
Fe Model ◽  
Ear Canal ◽  
Blast Overpressure ◽  
Stapes Footplate ◽  
Human Ear ◽  
Temporal Bones

Abstract Blast-induced injuries affect the health of veterans, in which the auditory system is often damaged, and blast-induced auditory damage to the cochlea is difficult to quantify. A recent study modeled blast overpressure (BOP) transmission throughout the ear utilizing a straight, two-chambered cochlea, but the spiral cochlea's response to blast exposure has yet to be investigated. In this study, we utilized a human ear finite element (FE) model with a spiraled, two-chambered cochlea to simulate the response of the anatomical structural cochlea to BOP exposure. The FE model included an ear canal, middle ear, and two and half turns of two-chambered cochlea and simulated a BOP from the ear canal entrance to the spiral cochlea in a transient analysis utilizing fluid-structure interfaces. The model's middle ear was validated with experimental pressure measurements from the outer and middle ear of human temporal bones. The results showed high stapes footplate displacements up to 28.5µm resulting in high intracochlear pressures and basilar membrane (BM) displacements up to 43.2µm from a BOP input of 30.7kPa. The cochlea's spiral shape caused asymmetric pressure distributions as high as 4kPa across the cochlea's width and higher BM transverse motion than that observed in a similar straight cochlea model. The developed spiral cochlea model provides an advancement from the straight cochlea model to increase the understanding of cochlear mechanics during blast and progresses towards a model able to predict potential hearing loss after blast.

scholarly journals Macroscopic description of the external and middle ear of paca (Cuniculus paca Linnaeus, 1766)

2015 ◽  
Vol 35 (6) ◽  
pp. 583-589 ◽  
Author(s):  
Leandro L. Martins ◽  
Ijanete Almeida-Silva ◽  
Maria Rossato ◽  
Adriana A.B. Murashima ◽  
Miguel A. Hyppolito ◽  
...  
Keyword(s):  
Tympanic Membrane ◽  
Middle Ear ◽  
Gross Anatomy ◽  
Experimental Models ◽  
Temporal Region ◽  
External Ear ◽  
Wild Animals ◽  
Ear Canal ◽  
Macroscopic Description ◽  
Mouse Ear

Abstract: Paca (Cuniculus paca), one of the largest rodents of the Brazilian fauna, has inherent characteristics of its species which can conribute as a new option for animal experimantation. As there is a growing demand for suitable experimental models in audiologic and otologic surgical research, the gross anatomy and ultrastructural ear of this rodent have been analyzed and described in detail. Fifteen adult pacas from the Wild Animals Sector herd of Faculdade de Ciências Agrárias e Veterinárias, Unesp-Jaboticabal, were used in this study. After anesthesia and euthanasia, we evaluated the entire composition of the external ear, registering and ddescribing the details; the temporal region was often dissected for a better view and detailing of the tympanic bulla which was removed and opened to expose the ear structures analyzed mascroscopically and ultrastructurally. The ear pinna has a triangular and concave shape with irregular ridges and sharp apex. The external auditory canal is winding in its path to the tympanic mebrane. The tympanic bulla is is on the back-bottom of the skull. The middle ear is formed by a cavity region filled with bone and membranous structures bounded by the tympanic membrane and the oval and round windows. The tympanic membrane is flat and seals the ear canal. The anatomy of the paca ear is similar to the guinea pig and from the viewpoint of experimental model has major advantages compared with the mouse ear.

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