Pivot Shift Test – Lateral Pivot Shift Maneuver
Test of
Machintosh – Pivot-Jerk Test |
Examination type |
Ligamentous Stability |
Patient & Body Segment Positioning |
Patient should lie supine, and be completely relaxed on the exam
table |
Examiner Position |
The examiner will grasp the patient’s ankle with one hand, and
also grasp the lateral side of the leg level with the fibular
head. |
Tissues
Being Tested |
Anterior
Cruciate Ligament |
Performing the Test |
Examiner will passively move the patient’s hip into 30 degrees
of abduction and flexion. The examiner will then medially rotate
the leg slightly. Next, the examiner will axial load the leg and
flex the knee with the lower hand while applying valgus stress
to the knee with the upper hand. Once the subluxation is felt
the examiner will then extend the leg 30 – 40 degrees to reduce
the subluxation. |
Positive Test |
If
an anterolateral subluxation of the tibia occurs along with a
reduction of the lateral femoral condyle the test is positive. |
Interpretation |
Anterolateral
Rotary Instability; ACL Sprain or Tear |
Common errors in
performing exam |
Possible errors in performing this test can include but are not
limited to: improper patient positioning, improper examiner
positioning, having active participation from the patient, and
not allowing the patient to fully relax before and during the
examination. |
Factors possibly
resulting in misinterpretation |
Several factors can cause the examiner to read a false negative
for this test. If the IT Band is sprained or torn or if
excessive swelling is present, the examiner may have a false
negative test. Also, if the patient is apprehensive, the
protective muscle contractions produced will cause a false
negative by not allowing the tibia to slip backwards. |
Related tests |
Soft Pivot Shift Test; Active Pivot Shift Test; Jerk Test of
Hughston; Losee Test; Slocum ALRI Test; Crossover Test of
Arnold; Noyes Flexion-Rotation Drawer Test; Lemaire’s Jolt Test;
Flexion-Extension Valgus Test; Nakajima Test; Marten’s Test |
References |
Booher,
James M., & Thibodeau Gary A. (2000). Athletic Injury
Assessment Fourth Edition. U.S.A.: McGraw-Hill.
Magee, David J. (2002). Orthopedic Physical Assessment.
Philadelphia, PA: Elsevier.
Prentice, William E. (2003). Arnheim’s Principles of Athletic
Training A Competency-Based Approach. U.S.A.: McGraw-Hill
Companies, INC. |
Links: |
http://www.sportsdoc.umn.edu/Clinical_Folder/Knee_Folder/Knee_Exam/pivot%20shift.htm
http://www.wheelessonline.com/ortho/pivot_shift_test
http://www.mmsfitness.com/steroid_newsletter/kneeinjury/acute_knee_injuries.htm
http://www.mayoclinic.com/health/acl-injury/AC99999/PAGE=AC00005
http://www.geocities.com/schach23/ACL/ACLtear.html?200622
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