An Innovative Method of Assessing the Mechanical Axis Deviation in the Lower Limb in Standing Position
Introduction: Various methods of measuring mechanical axis deviation of lower limb have been described including radiographic and CT scanogram, intraoperative fluoroscopy with the use of an electrocautery cord. These methods determine the mechanical axis in a supine, non-weight bearing position....
Main Authors: | , , , |
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Format: | Article |
Language: | English |
Published: |
JCDR Research and Publications Private Limited
2016-06-01
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Series: | Journal of Clinical and Diagnostic Research |
Subjects: | |
Online Access: | https://jcdr.net/articles/PDF/8042/17324_CE(RA1)_F(T)_PF1(ROAK)_PFA(AK)_PF2(PAG).pdf |
Summary: | Introduction: Various methods of measuring mechanical axis
deviation of lower limb have been described including radiographic and CT scanogram, intraoperative fluoroscopy with
the use of an electrocautery cord. These methods determine
the mechanical axis in a supine, non-weight bearing position.
Although long cassette standing radiographic view is used for the
purpose but is not available at most centres. A dynamic method
of determining the mechanical axis in a weight bearing position
was devised in this study.
Aim: The aim of the study was to describe a simpler and newer
method in quantifying the mechanical axis deviation in places
where full length cassettes for standing X rays are not available.
Materials and Methods: A pilot study was conducted on 15
patients. The deviation from the mechanical axis was measured
using a manually operated, hydraulic mechanism based, elevating
scissor lift table. Patient was asked to stand erect over the
elevating lift table with both patellae facing forward and C-arm
image intensifier was positioned horizontally. Radiological markers
were tied to a radio-opaque thread and placed at the centre of
head of the femur and another at the centre of the tibio-talar joint.
C-arm views of the hip, ankle and knee joint were taken to confirm
the correct position of the marker by varying the height of the lift
table.
Results: The mechanical axis deviation values were recorded by
measuring distance between the centre of the knee and radioopaque thread in cm. This was measured in each case both
clinically and from the image on the monitor. The two values
were found to be statistically same. Pain was measured on VAS.
Mechanical axis deviation values and VAS score were found to
be positively significantly correlated.
Conclusion: This technique is dynamic, unique and accurate
as compared to other methods for assessing mechanical axis
deviation in a weight bearing position. |
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ISSN: | 2249-782X 0973-709X |