Exploration of glenohumeral instability under anesthesia: the shoulder jerk test.
OBJECTIVE
The purpose of this study was to develop a new protocol for the performance of jerk tests under anesthesia, and to study its correlation to intra-articular pathology and the diagnosis of a lax or unstable shoulder.


METHODS
Prospective controlled study.


METHODS
We performed a systematic examination, in the office as well as under anesthesia, of 300 patients (600 shoulders) divided into 3 homogeneous groups: 100 presented with instability resulting from recurrent dislocation of one or both shoulders, 100 presented with alternative shoulder symptomatology without signs of instability, and a further 100 underwent surgery for other locomotor system pathologies.


RESULTS
The following statistical sensitivity values were found: anterior jerk, 90.7%; inferior jerk, 96.2%. Correct interpretation of jerk tests under anesthesia will help us decide the type and scope of required surgical therapy.


METHODS
Level III, Diagnostic Study of Nonconsecutive Patients.
Cuéllar
Ricardo
R
Department of Traumatology and Orthopaedic Surgery, The Donostia Hospital, University of Basque Country, San Sebastián, Spain. rcuellar@chdo.osakidetza.net
González
Javier
J
de la Herrán
Gaspar
G
Usabiaga
Jaime
J
D000758:Anesthesia; D000768:Anesthesia, General; D001182:Arthroscopy; D006801:Humans; D007593:Joint Instability / Q000503:physiopathology* / Q000601:surgery*; D018482:Muscle, Skeletal / Q000503:physiopathology; D009207:Myoclonus / Q000503:physiopathology; D010147:Pain Measurement; D011446:Prospective Studies; D012785:Shoulder Joint / Q000503:physiopathology* / Q000601:surgery