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Tube-perilymph fistula. An experimental study
1Department of Otolaryngology, 2nd Affiliated Hospital, Hunan Medical University, Changsha.
Chinese Medical Journal
|April 1, 1992
Summary
Diagnosing idiopathic perilymph fistula (PLF) is challenging. A new guinea pig model using a tube-PLF demonstrated significant changes in hearing threshold and cochlear function one week after surgery, aiding chronic PLF research.
Area of Science:
- Otolaryngology
- Neuroscience
- Animal Models
Background:
- Idiopathic perilymph fistula (PLF) diagnosis is difficult due to varied symptoms.
- An animal model is needed to study PLF's effects on cochlear function and postural audiometry.
Purpose of the Study:
- To establish a tube-PLF animal model in guinea pigs.
- To evaluate changes in cochlear sensitivity and postural audiometry in this model.
Main Methods:
- A polyethylene tube was inserted into the scala tympani via the round window in 10 guinea pigs.
- Hearing threshold (HT), action potential (AP) latency, and postural audiometry were measured using electrocochleography (ECoG) immediately and one week post-operation.
Main Results:
- No significant immediate changes were observed in HT, AP latency, or postural audiometry.
- One week post-operation, significant differences were found in HT (P<0.01) and postural audiometry.
- AP latency also showed a significant delay (P<0.01) one week later.
Conclusions:
- The tube-PLF model in guinea pigs shows potential for studying chronic perilymph fistulas.
- This model can reveal delayed changes in cochlear function and balance.