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Thoracic kyphosis angle measurements with ISIS2.

F Berryman¹, P Pynsent, J Fairbank

¹University of Wolverhampton, School of Engineering and the Built Environment, Telford, UK.

Studies in Health Technology and Informatics

|September 24, 2008

Summary

Surface topography using ISIS2 provides reliable thoracic kyphosis angle measurements. The system

Area of Science:

Orthopedics and Biomechanics
Medical Imaging and Instrumentation

Background:

Thoracic kyphosis is a spinal curvature with clinical significance.
Accurate and reliable measurement of kyphosis is crucial for monitoring treatment efficacy.
Surface topography offers a non-invasive method for assessing spinal alignment.

Purpose of the Study:

To evaluate the inherent variability of thoracic kyphosis angle measurements using the ISIS2 system.
To determine if the measured variability is clinically significant for monitoring kyphotic deformities.

Main Methods:

Surface topography measurements of thoracic kyphosis were performed using the ISIS2 device.
Repeat measurements were taken on 61 patients to assess variability due to stance, breathing, and muscle tension.

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Statistical analysis included calculating mean difference and 95% tolerance limits between measurements.

Main Results:

A mean thoracic kyphosis angle of 33.8 degrees was recorded (SD 13.4 degrees).
The mean difference between repeat measurements was -0.02 degrees (SD 3.18 degrees).
The 95% tolerance limits for measurement variability were -7.41 degrees to 7.38 degrees.

Conclusions:

The variability in thoracic kyphosis angle measurements with ISIS2 is lower than clinically significant changes.
The ISIS2 system demonstrates sufficient reliability for monitoring the progression of kyphotic deformities.