The arch volume index

NewsBot · Sep 27, 2012

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Three-dimensional measurement of foot arch in preschool children.
Chang HW, Lin CJ, Kuo LC, Tsai MJ, Chieh HF, Su FC.
Biomed Eng Online. 2012 Sep 25;11(1):76.

BACKGROUND:
The prevalence of flexible flatfoot is high among preschool-aged children, but the effects of treatment are inconclusive due to the unclear definitions of normal flatfoot. To date, a universally accepted evaluation method of the foot arch in children has not been completely established. Our aims of this study were to establish a new method to evaluate the foot arch from a three dimensional perspective and to investigate the flexibility of the foot arch among children aged from two to six.

METHODS:
A total of 44 children aged from two to six years of age were put into five age groups in this study. The navicular height was measured with one leg standing, and both feet were scanned separately in both sitting and one leg standing positions to compute the foot arch volume. The arch volume index, which represents the ratio of the difference in volume between sitting and one leg standing positions to the volume when sitting was calculated to demonstrate the flexibility of the foot arch. The differences of measured parameters between each aged group were analyzed by one-way ANOVA.

RESULTS:
The arch volumes when sitting and standing were highly correlated with the navicular height. The navicular height ranged from 15.75 to 27 mm, the arch volume when sitting ranged from 6,223 to 11,630 mm3, and the arch volume when standing from 3,111 to 7,848 mm3 from two to six years of age. The arch volume index showed a declining trend as age increased.

CONCLUSION:
This study is the first to describe the foot arch with volume perspective in preschool-aged children. The foot arch volume was highly correlated with the navicular height. Research results show both navicular height index and arch volume index gradually increase with age from two to six. At the same time the arch also becomes rigid with age from two to six. These results could be applied for clinical evaluation of the foot arch and post-treatment evaluation.
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drsha · Oct 6, 2012

Isn't the term Arch Volume a misnomer?

What Arch, which Arches?

Aren't we talking about Vault Volume and doesn't that make Vault Volume a treatment and research vehicle and escalate the import of The Vault of The Foot?

Dennis

NewsBot · Jan 24, 2022

Arch volume：a new method for medial longitudinal arch measurement
Foot and Ankle Surgery; 21 January 2022
ChenZhaoa et al

Background
As a flexible and elastic structure, the dynamic morphometry of medial longitudinal arch remains to be an unresolved Issue for clinic. Here we introduce a new measurement named arch volume to describe the morphological changes of the medial longitudinal arch during weight-bearing and compare with present method for measuring MLA.

Methods
64 healthy participants were enrolled. And the dynamic arch morphology was measured under four weight bearing status with navicular height, arch area and arch volume, respectively.

Results
With the increase of weight loading, the flattening or slightly deformation of medial longitudinal arch was observed by all method (p <0.05). However, as a 3D indicator, arch volume not only showed higher sensitivity than other method, but also provide visualization of MLA during loading changing.

Conclusions
Compared with navicular height and arch area, arch volume has a significant advantage in describing arch morphological changes under different weight bearing status.
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