Faber F W, Kleinrensink G J, Buyruk H M, Mulder P G, Stam H J, Snijders C J, Stoeckart R
Department of Orthopaedic Surgery, Leyenburg Hospital, P.O. Box 40551, 2504 LN, The Hague, The Netherlands.
Clin Biomech (Bristol). 2000 Dec;15(10):761-5. doi: 10.1016/s0268-0033(00)00049-8.
To assess whether first tarsometatarsal joint stiffness can be measured by Doppler imaging of vibrations and if so, to assess reference values.
Repeated in vivo Doppler imaging of vibrations measurements at the first tarsometatarsal joint in healthy persons.
Clinical hypermobility of the first tarsometatarsal joint is an important factor in a hallux valgus deformity. No objective and non-invasive test is available to quantify first tarsometatarsal joint mobility. Doppler imaging of vibrations, a technique recently developed to measure joint stiffness, might be an effective tool to quantify stiffness of this joint.
Vibrations were applied to the head of the first metatarsal in 46 feet of 23 healthy subjects and picked up by a transducer at both sides of the first tarsometatarsal joint. A pilot study was performed on three patients with hypermobility of the first tarsometatarsal joint. Measurements are expressed in threshold units related to colour Doppler imaging.
The values of the threshold units were found to be very similar in healthy persons, with a good repeatibility; 95% of the healthy persons had a threshold unit below 3.4. No significant difference was found between the left and right foot, or between male and female subjects. Also there was no significant correlation with age or weight of the subjects. In the three patients with first tarsometatarsal hypermobility we found threshold units above 5.
With Doppler imaging of vibrations first tarsometatarsal joint stiffness can be measured in healthy persons in a non-invasive and objective way. In a pilot study, three patients with first tarsometatarsal hypermobility showed lower stiffness values than the healthy subjects. Relevance This study presents a new method for quantification of first tarsometatarsal joint stiffness and provides reference values in healthy persons. First measurements on patients gave promising results to future use of this method for assessment of clinical hypermobility in hallux valgus patients.
评估是否可通过振动的多普勒成像测量第一跖跗关节的僵硬程度，若可行，则评估其参考值。
对健康人第一跖跗关节进行重复的体内振动多普勒成像测量。
第一跖跗关节的临床活动过度是拇外翻畸形的一个重要因素。目前尚无客观且非侵入性的测试可用于量化第一跖跗关节的活动度。振动的多普勒成像，一种最近开发用于测量关节僵硬程度的技术，可能是量化该关节僵硬程度的有效工具。
对23名健康受试者的46只脚的第一跖骨头施加振动，并由第一跖跗关节两侧的换能器接收。对3名第一跖跗关节活动过度的患者进行了一项初步研究。测量结果以与彩色多普勒成像相关的阈值单位表示。
发现健康人的阈值单位值非常相似，具有良好的重复性；95%的健康人的阈值单位低于3.4。左右脚之间或男性与女性受试者之间未发现显著差异。此外，与受试者的年龄或体重也无显著相关性。在3名第一跖跗关节活动过度的患者中，我们发现阈值单位高于5。
通过振动的多普勒成像，可以以非侵入性和客观的方式测量健康人第一跖跗关节的僵硬程度。在一项初步研究中，3名第一跖跗关节活动过度的患者显示出比健康受试者更低的僵硬程度值。相关性本研究提出了一种量化第一跖跗关节僵硬程度的新方法，并提供了健康人的参考值。对患者的首次测量为该方法未来用于评估拇外翻患者的临床活动过度提供了有希望的结果。
