外半规管壶腹嵴重或轻的患者的冷热试验。
Caloric testing in patients with heavy or light cupula of the lateral semicircular canal.
作者信息
Ichijo Hiroaki
机构信息
Ichijo Ear, Nose and Throat Clinic, 3-2-1 Ekimae Hirosaki Japan 036-8002.
出版信息
Laryngoscope Investig Otolaryngol. 2016 Nov 22;1(6):163-168. doi: 10.1002/lio2.39. eCollection 2016 Dec.
OBJECTIVE
To clarify whether the dysfunction of the lateral semicircular canal remain or not in patients with heavy or light cupula.
STUDY DESIGN
Prospective case series.
METHODS
The subjects were 19 patients with heavy cupula (3 males, 16 females; mean age, 62.8 years) and 14 patients with light cupula (5 males, 9 females; mean age, 63 years). Caloric testing (iced water) was carried out after complete disappearance of positional nystagmus. We measured maximum slow-phase velocity and calculated asymmetry.
RESULTS
In heavy cupula group, no one revealed canal paresis (CP) and 4 patients (21%) showed inverse CP (affected ear response is greater than healthy ear response). In light cupula group, 3 patients (21%) revealed CP.
CONCLUSIONS
Dysfunction of the lateral semicircular canal does not always remain in either heavy cupula or light cupula. The caloric response increases in some cases with heavy cupula. We can explain this phenomenon based on the hydrostatic pressure theory involved in ossicles.
LEVEL OF EVIDENCE
目的
明确重度或轻度壶腹嵴帽患者水平半规管功能障碍是否持续存在。
研究设计
前瞻性病例系列研究。
方法
研究对象为19例重度壶腹嵴帽患者（男3例，女16例；平均年龄62.8岁）和14例轻度壶腹嵴帽患者（男5例，女9例；平均年龄63岁）。在位置性眼震完全消失后进行冷热试验（冷水）。我们测量了最大慢相速度并计算不对称性。
结果
在重度壶腹嵴帽组中，无人出现半规管轻瘫（CP），4例患者（21%）出现反向CP（患耳反应大于健耳反应）。在轻度壶腹嵴帽组中，3例患者（21%）出现CP。
结论
重度或轻度壶腹嵴帽患者水平半规管功能障碍并非总是持续存在。在某些重度壶腹嵴帽病例中冷热反应增强。我们可以根据听小骨相关的流体静压理论来解释这一现象。
证据等级
4级。
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