title: Subacromial pressure during diagnostic shoulder tests.
abstract: The pressure in the subacromial bursa during passive provocation tests and during active motion was recorded in five healthy persons, and in seven patients with a subacromial pain syndrome. During the passive impingement test, the mean bursa pressure increased from 6 to 56 mmHg in healthy persons and from 8 to 45 mmHg in the patients. A passive test for anterior glenohumeral instability yielded bursa pressures below 0 mmHg in both groups. Active flexion of the arm at the shoulder produced a pressure increase up to 90° and a pressure decrease between 90 and 180° of flexion for both groups.
authors.affiliation: Sahlgren Hospital, Göteborg, Sweden; Departments of Orthopaedics, East Hospital, Sweden.
authors.forename: G
authors.initials: G
authors.lastname: Sigholm
authors.forename: J
authors.initials: J
authors.lastname: Styf
authors.forename: P
authors.initials: P
authors.lastname: Herberts