The Study: Novel Measurement Technique for the Sagittal Vertical Axis and Its Clinical Application in Adult Spinal Deformity.
- This was listed as a prospective study in which the authors measured the sagittal vertical axis (SVA).
- The authors indicated that prior studies of this type had not been done by using physical measurement of "the cranial center of gravity (CCG) in a relaxed standing position."
- The study included 252 healthy volunteers and 56 patients with adult spinal deformity."
- With the subjects standing in a relaxed position the horizontal distance between the center of gravity of the cranium and the spina-iliaca posterior superior (CCG-SIPS) was determined using a special ruler device.
- The examiners used a ruler that was bent at one point to form a 90 degree angle. The ruler was positioned so that one arm passed through the Cranial Center of Gravity and extended down vertically and the other arm was positioned to pass through the spina-iliaca posterior superior as it extended horizontally. The 90 degree bend was the intersection of the two arms. This allowed the examiner to measure the horizontal CCG-SIPS distance (the horizontal distance between the center of gravity of the cranium and spina-iliaca posterior superior.)
- Both groups were measured with the ruler but only the patients with adult spinal deformity were x-rayed.
- Health-related quality of life (HRQOL) factors were also assessed.
- The authors concluded that, "The CCG-SIPS correlated with age and strongly reflected radiographic SVA and HRQOL in the patients." They also indicated that it would be "a useful predictor of true SVA in clinical practice before radiographic evaluation."
This measurement correlated directly with age and poor HRQOL factors. Measurements taken with the device also correlated strongly with both the radiographic SVA and HRQOL.
The spinal alignment of these subjects was related to both age and health related quality of life. Once again it appears that there are articles in the literature pointing to the importance of spinal alignment. I would like to thank the researchers at the Hamamatsu Medical Center and Hamamatsu Medical University in Japan for this article.
Reviewer: Roger Coleman DC
Editor’s Comments: Great job by these medical researchers in evaluating a low tech, low cost method for assessing spinal structure…just the kind of tool chiropractors in the field could make good use of. And for once again demonstrating what so many DCs refuse to recognize. Postural imbalance is a bad thing. It should be assessed and corrected if at all possible.
Editor: Mark R. Payne DC
Reference: Yoshida G, Kurosu K, Yamato Y, Hasegawa T, Yasuda T, Togawa D, Matsuyama Y. Novel Measurement Technique for the Sagittal Vertical Axis and Its Clinical Application in Adult Spinal Deformity. Asian Spine J. 2017 Apr;11(2):190-197. doi: 10.4184/asj.2017.11.2.190. Epub 2017 Apr 12.
Link to Abstract: https://www.ncbi.nlm.nih.gov/pubmed/28443162