Just read a new research about "back pain Flip Test",It seems interesting article,As you know,Chinese doctor given up this flip test which not really show nerve root tension for many years.

Research said that generations of orthopedic surgeons, physical therapists have used the flip test (also known as the sitting straight leg raise) to confirm sciatic nerve root compression. The technique has been presented in texts books, articles, and other publications for the past 50 years.

The authors of this study suggested it was time to test the validity of the flip test. Does it really measure nerve root tension? Exactly how should the test be administered?

the authors suggested using the name sitting straight-leg raise test (instead of flip test) as a more accurate descriptor of the test. Second, the test was only useful as a check of nerve root tension when the patient's response was pain before the leg was raised 45 degrees. Test validity was much stronger when this modification was made in determining a positive test result.

Ok,We understand.But we have more accurate flip test which is most important for patient's decision making whether surgical treatment or not rather than knowing nerve tension.Want to know what is zak acupuncture flip test,please let me know.info@backachetherapy.co.uk
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Reference:spine magazine