A knee is considered to be locked when following some incident the patient finds themself unable to take the knee through a full range of movement.

Synonyms: 
locking
pseudolocking
stuck knee
-

Diagnosing the cause of a locked knee

This illustrated downloadable .pdf ebook explores the potential causes of a locked knee - both the most common cause as well as more unusual presentations:

...
-

CLINICAL PUBLICATIONS

The unusual traumatic locked young knee Miswan MFM, Alsagoff SL, Effendi FM, and MI Ibrahim. Malays Fam Physician. 2019; 14(2): 26–28.

[A Locked Knee Without Previous Trauma] - abstract only - article in Dutch Brouwers HFG, van Raay JJAM and Somford MP. Ned Tijdschr Geneeskd . 2017;161:D964.

Knee locked in flexion: incarcerated semitendinosus tendon around a proximal tibial osteochondroma Andrews K, Rowland A and Tank J. J Surg Case Rep. 2019 Feb; 2019(2): rjy346.


See also: