TY  - CHAP
M1  - Book, Section
TI  - Patellar Dislocations
A1  - Breed, Meghan
A1  - Fitch, Robert Warne
A2  - Knoop, Kevin J.
A2  - Stack, Lawrence B.
A2  - Storrow, Alan B.
A2  - Thurman, R. Jason
PY  - 2021
T2  - The Atlas of Emergency Medicine, 5e
AB  - Patellar  dislocations  can  result  from  either  direct  trauma  or  powerful  quadriceps  contraction  with  knee  flexion.  Commonly,  the  patella  dislocates  laterally.  Patients  who  present  after  a  patellar  dislocation  may  state  their  knee  dislocated  and  spontaneously  reduced.  A  hemarthrosis  can  be  present.  Common  complaints  include  pain,  swelling,  and  deformity.  The  patellar  apprehension  test  (gently  displacing  the  patella  laterally  or  medially  while  in  extension)  is  often  positive  in  spontaneously  reduced  patellar  dislocations.  The  patient  will  become  apprehensive  as  you  attempt  to  reproduce  the  dislocation.  Radiography  will  confirm  the  dislocation  and  help  rule  out  associated  fracture.  Fractures  of  the  patella  or  lateral  femoral  condyle  occur  in  5%  of  patients.  
SN  - 
PB  - McGraw-Hill
CY  - New York, NY
Y2  - 2024/04/23
UR  - accessemergencymedicine.mhmedical.com/content.aspx?aid=1181042108
ER  -