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Table 1 Different patients have different correction prescription

From: Combination of external fixation using digital six-axis fixator and internal fixation to treat severe complex knee deformity

Correction prescription

Finish adjusting in 14 days. Adjust screws in every morning, noon, night and before going to bed. Adjust poles needed be lengthened first and poles needed be shortened then

 

Anteromedial (No.1)

Medial (No.2)

Posteromedial (No.3)

Posterolateral (No.4)

Lateral (No.5)

Anterolateral (No.6)

Initial length (mm)

157.5

123.0

131.0

178.0

188.0

164.0

Targeted length (mm)

164.9

159.4

168.3

168.3

162.2

149.1

Length adjusted totally (mm)

7.4

36.4

37.3

− 9.7

− 25.8

− 14.9

Length adjusted every day (mm)

0.5

2.6

2.7

− 0.7

− 1.8

− 1.1

Every facet’s length screwed (mm)

0.17

0.17

0.17

0.17

0.17

0.17

How many facets adjusted every day (mm)

3.2

15.6

16.0

− 4.2

− 11.1

− 6.4

How many facets adjusted once (mm)

0.8

3.9

4.0

− 1.0

− 2.8

− 1.6

Day 1 (mm)

158.0

125.6

133.7

177.3

186.2

162.9

Day 2 (mm)

158.6

128.2

136.3

176.6

184.3

161.9

Day 3 (mm)

159.1

130.8

139.0

175.9

182.5

160.8

Day 4 (mm)

159.6

133.4

141.7

175.2

180.6

159.7

Day 5 (mm)

160.1

136.0

144.3

174.5

178.8

158.7

Day 6 (mm)

160.7

138.6

147.0

173.8

176.9

157.6

Day 7 (mm)

161.2

141.2

149.7

173.2

175.1

156.6

Day 8 (mm)

161.7

143.8

152.3

172.5

173.3

155.5

Day 9 (mm)

162.3

146.4

155.0

171.8

171.4

154.4

Day 10 (mm)

162.8

149.0

157.6

171.1

169.6

153.4

Day 11 (mm)

163.3

151.6

150.3

170.4

167.7

152.3

Day 12 (mm)

163.8

154.2

163.0

169.7

165.9

151.2

Day 13 (mm)

164.4

156.8

165.6

169.0

164.0

150.2

Day 14 (mm)

164.9

159.4

168.3

168.3

162.2

149.1

  1. And this chart was given to the patients in Chinese. These patients can finish adjusting in 14 days. Adjust the length of every strut by screwing the nuts in every morning, noon, night and before going to bed. Adjust struts needed be lengthened first and struts needed be shortened then. Every nut has 6 facets. Reading the facets is easier for the patients. When nut was screwed for one round, the length of the rod changed for 1 mm. So, the change of every facet is 0.17 mm. It is not needed to be accurate at the first three times of adjusting every day. Before sleeping, check the length of the rod according to the chart. + means to lengthen. − means to shorten