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Table 2 The sonographic information of measurement in normal thumb and trigger thumb

From: The cross-sectional area ratio of a specific part of the flexor pollicis longus tendon- a stable sonographic measurement for trigger thumb: a cross-sectional trial

 

C1 (cm2)

C2(cm2)

C1/C2

Normal thumb

0.072 ± 0.024

0.074 ± 0.023

0.983 ± 0.103

Group 1

0.046 ± 0.013

0.048 ± 0.013

0.978 ± 0.100

Group 2

0.073 ± 0.018

0.075 ± 0.018

0.967 ± 0.078

Group 3

0.081 ± 0.020

0.081 ± 0.019

0.996 ± 0.104

Group 4

0.092 ± 0.022

0.092 ± 0.018

1.000 ± 0.131

Trigger thumb

0.224 ± 0.324

0.122 ± 0.187

2.156 ± 1.362

Group A

0.312 ± 0.431

0.146 ± 0.222

3.112 ± 2.364

Group B

0.196 ± 0.281

0.114 ± 0.175

1.840 ± 0.081

  1. In each box of the measurements, the mean value ± standard deviation is described in the upper box
  2. C1 = the cross-sectional area of metacarpophalangeal (MCP) joint of flexor pollicis longus (FPL) tendon; C2 = the cross-sectional area of the midpoint of the first metacarpal of FPL tendon; C1/C2 = the ratio of C1 to C2
  3. Group1: 0 – 6 year, Group 2: 7–17 year, Group3:18- 40 year and Group4: ≥ 41 year
  4. Group A: 0- 6 year) and Group B: ≥ 41 year
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BMC Musculoskeletal Disorders

ISSN: 1471-2474

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