Imaging Measurement of Intramedullary Nail Design for Proximal Fifth Metatarsal Fracture

Guangxiong HE; Sixue PAN; Juan WU; Junyi XIANG; Yu LU; Chaoyu BAO

doi:10.12259/j.issn.2095-610X.S20230108

Volume 44 Issue 1

Jan. 2023

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Guangxiong HE, Sixue PAN, Juan WU, Junyi XIANG, Yu LU, Chaoyu BAO. Imaging Measurement of Intramedullary Nail Design for Proximal Fifth Metatarsal Fracture[J]. Journal of Kunming Medical University, 2023, 44(1): 76-79. doi: 10.12259/j.issn.2095-610X.S20230108

Citation:

Guangxiong HE, Sixue PAN, Juan WU, Junyi XIANG, Yu LU, Chaoyu BAO. Imaging Measurement of Intramedullary Nail Design for Proximal Fifth Metatarsal Fracture[J]. Journal of Kunming Medical University, 2023, 44(1): 76-79. doi: 10.12259/j.issn.2095-610X.S20230108

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Imaging Measurement of Intramedullary Nail Design for Proximal Fifth Metatarsal Fracture

doi: 10.12259/j.issn.2095-610X.S20230108

1.
The 1st Clinical Medical College of Yunnan University of Traditional Chinese Medicine，Kunming Yunnan 650500
2.
The 4th Department of Orthopaedics，The 1st Affiliated Hospital of Yunnan University of Traditional Chinese Medicine/Yunnan Traditional Chinese Medicine Hospital，Kunming Yunnan 650021，China

Received Date: 2022-10-11
Available Online: 2023-01-18
Publish Date: 2023-01-18

Abstract

Abstract

Objective To measure the size of the fifth metatarsal bone marrow cavity, the length of the intramedullary nail and the length of the fifth metatarsal bone in normal adults by X-ray, and to provide a basis for the selection of the diameter and length of the intramedullary nail for the proximal fifth metatarsal fracture. Methods 120 patients, 60 males and 60 females, aged from 19 to 79 years old, who met the inclusion criteria and underwent foot X-ray examination, were selected from Yunnan Traditional Chinese Medicine Hospital. The diameter of the medullary cavity, the length of the anteroposterior position, and the length of the intramedullary nail （the distance from the base of the fifth metatarsal bone to the bending of the metatarsal shaft） were measured. SPSS26.0 statistical software package was used for statistical analysis of measurement results. Two independent samples of t-test were used for comparison between two groups of normal distribution measurement data. Pearson correlation analysis was used for correlation analysis. P < 0.05 indicated that there was a statistically significant difference. Results The average diameter of the medullary cavity in the anteroposterior position was 4.15 mm （2.24 mm～5.64 mm）, the average diameter of the fifth metatarsal cavity in the oblique position was 4.31 mm （3.18 mm～5.81 mm）, the average length of intramedullary nails was 39.74 mm （28.07 mm～53.46 mm）, the average length of the fifth metatarsal was 71.64 mm （59.73 mm～85.44 mm）, and the average ratio of the length of intramedullary nails to the length of the fifth metatarsal was 55.48% （41.12%～68.05%）. The t-test confirmed that there was no significant difference in ages between men and women （P > 0.05）. The diameter of the medullary cavity, the length of the metatarsal bone, and the length of the intramedullary nail in the positive and oblique positions of men and women were statistically significant （P < 0.05）. The ratio of the length of the intramedullary nail to the length of the fifth metatarsal bone was not statistically significant （P > 0.05）. Pearson correlation analysis: There was no correlation between the metatarsal length and the ratio of intramedullary nail length to the fifth metatarsal length in men and women （P > 0.05）. Conclusion By keeping the length of the intramedullary nail less than 55.48% of the length of the fifth metatarsal bone, the excessive length of the intramedullary nail can be avoided. Since the diameter of the medullary cavity in the positive and oblique position of most patients is greater than 4 mm, an intramedullary nail with a diameter greater than 4 mm may be required to provide adequate fixation and reduce complications.
- Fifth metatarsal proximal fracture,
- Intramedullary nail,
- Imaging,
- Measure

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References(14)

References

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