Knee Special Tests Flashcards
(178 cards)
How to perform
Anterior drawer
Pt supine, Flex knee to
- place hands in starting reference position
- You know from the previous test if the tibia has not sagged back,
- Keeping elbows straight, pull body straight forward (just rock body), feel for hamstring guarding
- If it subluxates toward you, you know it’s a PCL tear
implications
Passive Tracking
Noncontractile tissue, patellar groove
indications
Medial/Lateral patellar glides
all patients
How to perform
Flexion Rotation Drawer (FRD)
pt in supine, knee flexed 0-60 degrees * Hug ankle under arm and grab proximal tibia with both hands - Good test because 2 planar and doesn’t hurt them * Valgus and compressive force-trying to take patella to contralateral ASIS - Go fly fishing - Normal knee will see nice smooth motion - Abnormal knee gives wiggle/wabble - Like pivot shift but less aggressive, positive test is subluxation of femur on fixed tibia
response
Anterior drawer
If tibia subluxates forwards, you know it’s an ACL tear
How to perform
Recurvatum
Pt. supine, stabilized the distal femur with one hand, grab ankle with other hand Pull up on ankle, trying to hyperextend knee 3 times 10 degrees is normal amount of recurvatum
indications
Apley’s Compression and Dynamic Compression (DDV)
- *History of macrotrauma 2. *Twisting MOI 3. *Delayed effusion (over 12 hours) 4. *Reproducible click/clunk 5. *Pseudo locking 6. *Joint line pain
What test is for meniscus and PCL?
Recurvatum (Laxity -> PCL/posterior capsule; palpate over joint [prob reprod of symptoms] -> anterior horns of meniscus).
How to perform
Recurvatum for Meniscus
Pt. supine, stabilized the distal femur with one hand and PALPATE JOINT, grab ankle with other hand Pull up on ankle, trying to hyperextend knee-3 times 10 degrees is normal amount of recurvatum Same as PCL recurvatum test except palpate joint line
implications
PMRI
Post 1/3 med. Cap., PMOL (some say this can’t happen with PCL intact) PCL must be intact to perform the test
response
Recurvatum
10_ is normal amount of recurvatum
response
Active Tracking OKC
Patella should move through a C (right) or reverse C shape (left). Not good if it goes laterally at top especilly
test category
Medial/Lateral patellar glides
Patello-Femoral
response
Lachman’s Test
Positive test is > 3mm translation and an empty end feel or lack of capsular end feel o Normally you feel a clunk where the ACL stops the tibia from moving
test category
fluid wave test
Effusion (intra-articular swelling)
response
Flexion Rotation Drawer (FRD)
Normal knee will see nice smooth motion - Abnormal knee gives wiggle/wabble - Like pivot shift but less aggressive - positive Test is subluxation of femur on fixed tibia
How to perform
Moving Patellar Apprehension test.
Two parts (first part must be + to move to part 2): pt supine, leg off table. 1) Use thumb to Manually glide patella laterally with knee Extended and passivly Flex to 90 degrees with Patella. Check for pt apprehension and pain. + Test: oral apprehension or quad apprehensive activation 2) Repeat with medial glide. + is No apprehension allowin full ROM
How to perform
ALRI
pt supine: knee flexed < 90 degrees (80-70 good) Same as Anterior drawer, except tibia is IR
indications
Medial/Lateral tilts
all patients
test category
Recurvatum
PCL
How to perform
Pivot shift
pt supine, knee 0-80 degrees * Grab under heel and flex hip * Thumb under fibular head, fingers to ceiling, palm on lateral joint line - 2 planar instability: tibia moves anteriorly and internally rotates * give valgus force and flex knee in one quick motion - move to about 60 degrees knee flexion * keep foot neutral
How to perform
Jerk test
pt supine, knee flexed 80-0 degrees pt supine, opposite of pivot shift - from knee flexion of about 60 degrees, after performing pivot shift, return leg to table with same valgus force: * Thumb under fibular head, fingers to ceiling, palm on lateral joint line * give valgus force and extemd knee in one quick motion, from about 60 degrees knee flexion * keep foot neutral
How to perform
Apley’s Distraciton test and Apleys Dynamic Distraction Test (DDV)
* Pt prone, knee flexed 90 degrees * Both hands proximal to malleoli, counterforce with your knee on top of their thigh * Distract and externally rotate to tighten MCL ligaments (internally rotate to tighten LCL) Apley’s Dynamic Distraction - repeat test as above but take through ROM to extension and back three times each in ER and IR
test category
Sag Test
PCL