Femoral nerve stretch test

Femoral nerve stretch test
Medical diagnostics
Purpose related to possible nerve root impingements.

Femoral nerve stretch test (Mackiewicz sign[1]) - for the FNST the patient lies prone, the knee is passively flexed to the thigh and the hip is passively extended (reverse Lasegues); the test is positive if the patient experiences anterior thigh pain. This test is usually positive L2-L3, L3-L4 (high lumbar), slightly positive or negative in L4–L5 disc protrusions and negative in cases with a lumbosacral protrusion.

References

  1. ↑ Ohry, A (2011). "סימן פיסיקלי שנשכח: הסימן על שם מצקביץ'" [A forgotten eponym: the Mackiewicz sign]. Harefuah (in Hebrew). 150 (6): 548–49, 550. PMID 21800497.

Further reading

  • Christodoulides, A. N. (1989). "Ipsilateral sciatica on femoral nerve stretch test is pathognomonic of an L4/5 disc protrusion". The Journal of Bone and Joint Surgery. British volume. 71 (1): 88–89. PMID 2915013.
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