Lower Extremity - Part 2- Exam 2 Flashcards
(172 cards)
**What are the Ottawa knee rules to decide whether or not to order knee xrays?
_____ is a primary stabilizer of the knee preventing anterior translation of the tibia in relation to the femur. What are the MOI?
ACL
Sudden deceleration with rotational trauma or hyperextension
aka NON-contact injuries
ACL tear is commonly associated with ______. What are rarely injuried?
meniscal tear
MCL, LCL, or PCL are rarely damaged
What usually happens next after the twisting/hyperextension in an ACL tear?
Sudden pain & giving way of the knee
Audible “pop”
joint effusion
What are the 3 special ACL tear tests?
Lachman
Anterior Drawer
Pivot Shift test
What xrays should you order in an ACL tear? What 2 things can it show? How do you confirm ACL tear dx?
AP, lateral and tunnel views
effusion or avulsion fracture
MRI!!
What is a Segond fracture?
May show an avulsion fracture of the lateral capsular margin of the tibia
What pt population is common to see a tibial eminence fx?
common in patients with open growth plates
How is a tunnel view shot? What body part?
knee
What will joint effusion show up like on a knee xray?
A knee joint effusion appears as well-defined rounded homogeneous soft tissue density within the suprapatellar recess on a lateral radiograph
What am I?
Tibial Eminence Fracture with ACL Tear
What is the initial management for an ACL tear?
RICE with knee immobilizer brace, +/- crutches
Pain relief → acetaminophen before NSAIDs
Consider aspiration if effusion is large
Start early ROM exercises as pain allows
When should you refer to ortho for an ACL tear?
Young patients → reconstruction with graft
What is the ACL reconstruction graft made out of?
Graft is taken from patients patellar, hamstring, or quadriceps tendon or from a cadaver
What is the tx for older patients with an ACL tear?
refer to PT to strengthen surrounding muscles to improve stability
What are the MOI for a PCL tear? What is it associated with?
Direct blow to the tibia
extreme hyperextension (usually also has an ACL rupture)
Often associated with other injuries! Collateral ligaments, ACL ruptures
Need to assess ____ if multi-ligamentous injury is suspected. How do you assess it?
NV status
Assess with ABI - if < 0.9 order arterial imaging to r/o intimal tear that could lead to thrombosis
What is the initial tx for a PCL tear? When should you begin ROM?
RICE, Knee immobilizer
Begin ROM after 1-5 days
What is the tx for isolated PCL injuries? What is the tx for multi-ligamentous injuries?
PT to strengthen quads and hamstrings and restore ROM
If PT fails to restore stability reconstruction is needed
Multi-ligamentous injuries → Reconstruction
What is the MOI for a MCL tear?
lateral (valgus) blow to the knee
What is the MOI for a LCL injury?
usually occurs in association with other traumatic knee injuries
Is MCL or LCL more common?
MCL is more common!!
What is the presentation of a collateral ligament tear? When does it get worse? Will the pt be able to bear weight?
Localized pain, tenderness, swelling and stiffness along ligament course
worsens over 6-8 hours
YES!! but it will be very uncomfortable
**What should be included as part of your PE in a collateral ligament injury? What can screw the results?
Varus/valgus testing performed in extension and 30° flexion
Instability may be masked by pain and involuntary muscle contraction