Straight leg raise: Difference between revisions

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{{SK}} Lasègue's sign; lasègue test
 
==Overview==
==Overview==
The '''Straight leg raise''' also, called Lasègue sign or Lasègue test, is a test done during the physical examination to determine whether a patient with [[low back pain]] has an underlying [[Spinal disc herniation|herniated disk]].
The '''straight leg raise''' is a test done during the physical examination to determine whether a patient with [[low back pain]] has an underlying [[Spinal disc herniation|herniated disk]].


==Historical Perspective==
It was named after [[Charles Lasègue]] (1816-1883).
==Technique==
==Technique==
With the patient lying down on a table, the examiner lifts the patient's leg while the knee is straight.
With the patient lying down on a table, the examiner lifts the patient's leg while the [[knee]] is straight.


A variation is to lift the leg while the patient is sitting.<ref name="pmid6446157">{{cite journal |author=Waddell G, McCulloch JA, Kummel E, Venner RM |title=Nonorganic physical signs in low-back pain |journal=Spine |volume=5 |issue=2 |pages=117-25 |year=1980 |pmid=6446157 |doi=}}</ref> However, this reduces the sensitivity of the test.<ref name="pmid17601462">{{cite journal |author=Rabin A, Gerszten PC, Karausky P, Bunker CH, Potter DM, Welch WC |title=The sensitivity of the seated straight-leg raise test compared with the supine straight-leg raise test in patients presenting with magnetic resonance imaging evidence of lumbar nerve root compression |journal=Archives of physical medicine and rehabilitation |volume=88 |issue=7 |pages=840-3 |year=2007 |pmid=17601462 |doi=10.1016/j.apmr.2007.04.016}}</ref>
A variation is to lift the leg while the patient is sitting.<ref name="pmid6446157">{{cite journal |author=Waddell G, McCulloch JA, Kummel E, Venner RM |title=Nonorganic physical signs in low-back pain |journal=Spine |volume=5 |issue=2 |pages=117-25 |year=1980 |pmid=6446157 |doi=}}</ref> However, this reduces the sensitivity of the test.<ref name="pmid17601462">{{cite journal |author=Rabin A, Gerszten PC, Karausky P, Bunker CH, Potter DM, Welch WC |title=The sensitivity of the seated straight-leg raise test compared with the supine straight-leg raise test in patients presenting with magnetic resonance imaging evidence of lumbar nerve root compression |journal=Archives of physical medicine and rehabilitation |volume=88 |issue=7 |pages=840-3 |year=2007 |pmid=17601462 |doi=10.1016/j.apmr.2007.04.016}}</ref>
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"The straight leg raise test is positive if pain in the sciatic distribution is reproduced between 30° and 70° passive flexion of the straight leg." <ref name="pmid15130982">{{cite journal |author=Speed C |title=Low back pain |journal=BMJ |volume=328 |issue=7448 |pages=1119-21 |year=2004 |pmid=15130982 |doi=10.1136/bmj.328.7448.1119}}</ref>
"The straight leg raise test is positive if pain in the sciatic distribution is reproduced between 30° and 70° passive flexion of the straight leg." <ref name="pmid15130982">{{cite journal |author=Speed C |title=Low back pain |journal=BMJ |volume=328 |issue=7448 |pages=1119-21 |year=2004 |pmid=15130982 |doi=10.1136/bmj.328.7448.1119}}</ref>


A [[meta-analysis]] reported the accuracy is<ref name="pmid10788860">{{cite journal |author=Devillé WL, van der Windt DA, Dzaferagić A, Bezemer PD, Bouter LM |title=The test of Lasègue: systematic review of the accuracy in diagnosing herniated discs |journal=Spine |volume=25 |issue=9 |pages=1140-7 |year=2000 |pmid=10788860 |doi=}}</ref>:
A [[meta-analysis]] reported the accuracy as:<ref name="pmid10788860">{{cite journal |author=Devillé WL, van der Windt DA, Dzaferagić A, Bezemer PD, Bouter LM |title=The test of Lasègue: systematic review of the accuracy in diagnosing herniated discs |journal=Spine |volume=25 |issue=9 |pages=1140-7 |year=2000 |pmid=10788860 |doi=}}</ref>
* [[sensitivity (tests)|sensitivity]] 91%
* [[sensitivity (tests)|Sensitivity]] 91%
* [[specificity (tests)|specificity]] 26%
* [[specificity (tests)|Specificity]] 26%


If the raising the opposite leg causes pain (cross straight leg raising):
If raising the opposite leg causes pain (cross straight leg raising):
* [[sensitivity (tests)|sensitivity]] 29%
* [[sensitivity (tests)|Sensitivity]] 29%
* [[specificity (tests)|specificity]] 88%
* [[specificity (tests)|Specificity]] 88%


==References==
==References==
<references/>
{{reflist|2}}


{{Symptoms and signs}}
{{Symptoms and signs}}
{{SIB}}
 


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[[Category:Orthopedics]]
[[Category:Orthopedics]]
[[Category:Neurology]]
[[Category:Neurology]]
[[Category:Primary care]]
[[Category:Emergency medicine]]
[[Category:Emergency medicine]]

Latest revision as of 14:01, 13 February 2013

Template:Search infobox Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

Synonyms and keywords: Lasègue's sign; lasègue test

Overview

The straight leg raise is a test done during the physical examination to determine whether a patient with low back pain has an underlying herniated disk.

Historical Perspective

It was named after Charles Lasègue (1816-1883).

Technique

With the patient lying down on a table, the examiner lifts the patient's leg while the knee is straight.

A variation is to lift the leg while the patient is sitting.[1] However, this reduces the sensitivity of the test.[2]

Interpretation

"The straight leg raise test is positive if pain in the sciatic distribution is reproduced between 30° and 70° passive flexion of the straight leg." [3]

A meta-analysis reported the accuracy as:[4]

If raising the opposite leg causes pain (cross straight leg raising):

References

  1. ↑ Waddell G, McCulloch JA, Kummel E, Venner RM (1980). "Nonorganic physical signs in low-back pain". Spine. 5 (2): 117–25. PMID 6446157.
  2. ↑ Rabin A, Gerszten PC, Karausky P, Bunker CH, Potter DM, Welch WC (2007). "The sensitivity of the seated straight-leg raise test compared with the supine straight-leg raise test in patients presenting with magnetic resonance imaging evidence of lumbar nerve root compression". Archives of physical medicine and rehabilitation. 88 (7): 840–3. doi:10.1016/j.apmr.2007.04.016. PMID 17601462.
  3. ↑ Speed C (2004). "Low back pain". BMJ. 328 (7448): 1119–21. doi:10.1136/bmj.328.7448.1119. PMID 15130982.
  4. ↑ Devillé WL, van der Windt DA, Dzaferagić A, Bezemer PD, Bouter LM (2000). "The test of Lasègue: systematic review of the accuracy in diagnosing herniated discs". Spine. 25 (9): 1140–7. PMID 10788860.

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