Quantifying vocal fold wound-healing biomechanical property changes.

Quantifying vocal fold wound-healing biomechanical property changes.
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DOI:
10.1002/lary.27999
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发表时间:
2020-02
期刊:
The Laryngoscope
影响因子:
--
通讯作者:
Branski RC
Branski RC
中科院分区:
其他
文献类型:
--
作者:
Dion GR;Guda T;Mukudai S;Bing R;Lavoie JF;Branski RC

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新的声带(VF)治疗方法的发展受到缺乏标准化,有意义的结果的限制。我们假设,自动微压痕为基础的VF生物力学特性映射匹配的组织学允许定量评估。离体。12只麻醉的新西兰白色家兔接受内窥镜下右侧VF损伤。在第7、30或60天收获/平分喉(n = 4/组),其中4个未损伤对照。生物力学测量值(法向力、结构刚度和1.96 mN时的位移)使用自动微压痕映射(0.3 mm深度,1.2 mm/s,2 mm球形压头)和网格覆盖(>50个位置向VF边缘加权,分为14个区域)计算。标记/固定/切片标本,并将载玻片与测量点匹配。在损伤区,法向力/结构刚度(平均值,标准差[SD]/平均值,SD)相对于未受伤增加(2.2 mN,0.64/7.4 mN/mm,2.14)和第7天(2.7 mN,0.75/9.0 mN/mm,2.49)至30天(4.3 mN,2.11/14.2 mN/mm,7.05),并在60天下降(2.7 mN,0.77/9.1 mN/mm,2.58)。VF位移从对照组(0.28 mm,0.05)和第7天(0.26 mm,0.05)至第30天(0.20 mm,0.05)降低,在第60天增加(0.25 mm,0.06)。单因素方差分析是显著的; Tukey事后检验证实第30天的样品与其他组不同(P < 0.05),在相邻区域中一致。远离损伤的区域在各组之间保持相似(P = 0.143至0.551)。这些测量值与定性组织学变化相匹配。可量化的VF生物力学特性可以与组织学相关联。这种技术方法是第一个同时将功能生物力学与组织学相关联的方法,是未来临床前研究的理想选择。本手册于2019年3月25日接受出版。
Development of novel vocal fold (VF) therapeutics is limited by a lack of standardized, meaningful outcomes. We hypothesize that automated microindentation-based VF biomechanical property mapping matched to histology permits quantitative assessment. Ex vivo. Twelve anesthetized New Zealand white rabbits underwent endoscopic right VF injury. Larynges were harvested/bisected day 7, 30, or 60 (n = 4/group), with four uninjured controls. Biomechanical measurements (normal force, structural stiffness, and displacement at 1.96 mN) were calculated using automated microindentation mapping (0.3 mm depth, 1.2 mm/s, 2 mm spherical indenter) with a grid overlay (>50 locations weighted toward VF edge, separated into 14 zones). Specimens were marked/fixed/sectioned, and slides matched to measurement points. In the injury zone, normal force/structural stiffness (mean, standard deviation [SD]/mean, SD) increased from uninjured (2.2 mN, 0.64/7.4 mN/mm, 2.14) and day 7 (2.7 mN, 0.75/9.0 mN/mm, 2.49) to day 30 (4.3 mN, 2.11/14.2 mN/mm, 7.05) and decreased at 60 days (2.7 mN, 0.77/9.1 mN/mm, 2.58). VF displacement decreased from control (0.28 mm, 0.05) and day 7 (0.26 mm, 0.05) to day 30 (0.20 mm, 0.05), increasing at day 60 (0.25 mm, 0.06). A one-way ANOVA was significant; Tukey’s post hoc test confirmed day-30 samples differed from other groups (P < 0.05), consistent across adjacent zones. Zones far from injury remained similar across groups (P = 0.143 to 0.551). These measurements matched qualitative histologic variations. Quantifiable VF biomechanical properties can be linked to histology. This technological approach is the first to simultaneously correlate functional biomechanics with histology and is ideal for future preclinical studies. This Manuscript was accepted for publication on March 25, 2019.
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