J Korean Orthop Assoc.  2007 Oct;42(5):593-598. 10.4055/jkoa.2007.42.5.593.

The Validity and Reliability of the EMC Device; For the Checking ofthe Mobility of the First Ray of the Foot

Affiliations
  • 1Department of Orthopedic Surgery, Eulji General Hospital, Eulji University, Korea. seungkeunh@hotmail.com
  • 2Department of Orthopedic Surgery, College of Medicine, Hanyang University, Seoul, Korea.

Abstract

PURPOSE: To evaluate the validity and intra-rater, inter-rater reliability of the EMC device used to check the mobility of the first ray of the foot.
MATERIALS AND METHODS
Sixty-nine cases (43 patients) of mild to severe hallux valgus feet were enrolled in this study. For an analysis of the validity of the EMC device, the dorsal mobility of the first ray of the foot was measured using the modified Coleman block test and EMC device. The intra- and inter-rater reliability of EMC device was evaluated by measuring the dorsal mobility of the first ray of the foot twice with three independent raters blinded to other's results. The results were analyzed for the intra-rater reliability and for inter-rater reliability.
RESULTS
The mean value of the dorsal mobility of the first ray of the foot by the EMC device and modified Coleman block test was 8.3 mm (range; 4.3-12.3 mm) and 7.4 mm (range; 3.4-10.3 mm), respectively. There was a significant difference between the EMC device and modified Coleman block test (p<0.05). However, both the measured data, showed a good correlation (Pearson correlation coefficient=0.84). The paired t-test for intra-rater reliability and ANOVA testing for inter-rater reliability showed no statistically significant difference.
CONCLUSION
The EMC device is reliable and valid for measuring the mobility of the first ray of the foot.

Keyword

Mobility of the first ray; EMC device; Validity and reliability

MeSH Terms

Foot*
Hallux Valgus
Reproducibility of Results*

Figure

  • Fig. 1 The dorsal mobility of the first ray of the foot was measured using the modified Coleman block test.

  • Fig. 2 The scatter plot shows measured data with the EMC device and the calculated data with the lateral radiographs using the modified Coleman block test.


Reference

1. Bednarz PA, Manoli A 2nd. Modified Lapidus procedure for the treatment of hypermobile hallux valgus. Foot Ankle Int. 2000. 21:816–821.
Article
2. Coughlin MJ, Mann RA. Surgery of the foot and ankle. 1999. 7th ed. St. Louis: Mosby;168–170.
3. Faber FW, Kleinrensink GJ, Verhoog MW, et al. Mobility of the first tarsometatarsal joint in relation to hallux valgus deformity: anatomical and biomechanical aspects. Foot Ankle Int. 1999. 20:651–656.
Article
4. Fritz GR, Prieskorn D. First metatarsocuneiform motion: a radiographic and statistical analysis. Foot Ankle Int. 1995. 16:117–123.
Article
5. Glasoe WM, Allen MK, Saltzman CL, Ludewig PM, Sublett SH. Comparison of two methods used to assess first-ray mobility. Foot Ankle Int. 2002. 23:248–252.
Article
6. Glasoe WM, Allen MK, Yack HJ. Measurement of dorsal mobility in the first ray: elimination of fat pad compression as a variable. Foot Ankle Int. 1998. 19:542–546.
Article
7. Glasoe WM, Yack HJ, Saltzman CL. Measuring first ray mobility with a new device. Arch Phys Med Rehabil. 1999. 80:122–124.
Article
8. Glasoe WM, Yack HJ, Saltzman CL. The reliability and validity of a first ray measurement device. Foot Ankle Int. 2000. 21:240–246.
Article
9. Grebing BR, Coughlin MJ. The effect of ankle position on the exam for first ray mobility. Foot Ankle Int. 2004. 25:467–475.
Article
10. Jones CP, Coughlin MJ, Pierce-Villadot R, et al. The validity and reliability of the Klaue device. Foot Ankle Int. 2005. 26:951–956.
Article
11. Klaue K, Hansen ST, Masquelet AC. Clinical, quantitative assessment of first tarsometatarsal mobility in the sagittal plane and its relation to hallux valgus deformity. Foot Ankle Int. 1994. 15:9–13.
Article
12. Lee KT, Young K. Measurement of first-ray mobility in normal vs. hallux valgus patients. Foot Ankle Int. 2001. 22:960–964.
Article
13. Myerson M. Metatarsocuneiform arthrodesis for treatment of hallux valgus and metatarsus primus varus. Orthopedics. 1990. 13:1025–1031.
Article
14. Myerson M, Allon S, McGarvey W. Metatarsocuneiform arthrodesis for management of hallux valgus and metatarsus primus varus. Foot Ankle. 1992. 13:107–115.
Article
15. Myerson MS, Badekas A. Hypermobility of the first ray. Foot Ankle Clin. 2000. 5:469–484.
16. Prieskorn DW, Mann RA, Fritz G. Radiographic assessment of the second metatarsal: measure of first ray hypermobility. Foot Ankle Int. 1996. 17:331–333.
Article
17. Sangeorzan BJ, Hansen ST Jr. Modified Lapidus procedure for hallux valgus. Foot Ankle. 1989. 9:262–266.
Article
18. Shirk C, Sandrey MA, Erickson M. Reliability of first ray position and mobility measurements in experienced and inexperienced examiners. J Athl Train. 2006. 41:93–99.
19. Smith RW, Reynolds JC, Stewart MJ. Hallux valgus assessment; report of research committee of American Orthopaedic Foot and Ankle Society. Foot Ankle. 1984. 5:92–103.
Article
20. Voellmicke KV, Deland JT. Manual examination technique to assess dorsal instability of the first ray. Foot Ankle Int. 2002. 23:1040–1041.
Article
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