复发性BPPV的代谢基质假说：耳石-耳石膜-内淋巴脆性

文献信息

中文摘要

背景： 良性阵发性位置性眩晕（BPPV）被视为一种单纯由耳石移位引起的机械性疾病，但仅凭这一模型难以解释自发性耳石脱落、双侧或多管性疾病、高复发率，以及部分患者中BPPV与全身代谢状况的聚集现象。本文提出并构建了一个统一的机制模型——代谢基质假说——将全身代谢状态与耳石脆性联系起来，并从中推导出可检验的预测。方法：这是一项假设生成性的叙述性和理论性综合——并非系统评价或荟萃分析——涉及耳石基质生物学、耳石膜锚定、内淋巴化学以及关于BPPV代谢危险因素的分散临床文献。支持每条所提出通路的证据以叙述性方式分级为：已确立的临床关联、实验或动物证据、机制性推断或推测性延伸。结果：在一个生物学上独特的患者亚群中，复发性特发性BPPV可能代表耳石-耳石膜-内淋巴单元全身代谢脆性的机械性表现。维生素D缺乏、雌激素撤退、骨质疏松、胰岛素抵抗、氧化应激、甲状腺自身免疫和微血管功能不全可能作为汇聚性入口导致基质韧性受损，而非独立的风险因素。结论：该模型产生了可检验的预测，并为复发性、双侧或多管性疾病提供了一种临床可及的代谢评估，作为复位手法的补充。

英文摘要

Benign paroxysmal positional vertigo (BPPV) is treated as a purely mechanical disorder of displaced otoconia, yet this model alone does not readily account for spontaneous otoconia detachment, bilateral or multicanal disease, high recurrence rates, or the clustering of BPPV with systemic metabolic conditions in a subset of patients. This article proposes and structures a unifying mechanistic model-the Metabolic Matrix Hypothesis-linking systemic metabolic states to otoconial fragility, and derives testable predictions from it. It is a hypothesis-generating narrative and theoretical synthesis-not a systematic review or meta-analysis-of otoconial matrix biology, otolithic membrane anchoring, endolymph chemistry, and the dispersed clinical literature on metabolic risk factors for BPPV. Evidence supporting each proposed pathway is graded narratively as established clinical association, experimental or animal evidence, mechanistic inference, or speculative extension. In a biologically distinct subset of patients, recurrent idiopathic BPPV may represent the mechanical expression of a systemic metabolic fragility of the otoconia-otolithic membrane-endolymph unit. Vitamin D deficiency, estrogen withdrawal, osteoporosis, insulin resistance, oxidative stress, thyroid autoimmunity, and microvascular insufficiency may act as convergent entry points into impaired matrix resilience rather than independent risks. The model generates testable predictions and a clinically accessible metabolic evaluation for recurrent, bilateral, or multicanal disease, complementing repositioning maneuvers.