The InSpace subacromial balloon spacer (Stryker, USA) is indicated for the treatment of massive irreparable rotator cuff tears. The device is placed in the subacromial space with the aim of restoring shoulder function by limiting painful acromiohumeral contact and recentering the superiorly migrated humeral head. However, controversy exists because two randomized controlled trials have produced conflicting findings with regards to efficacy.
Source: Arthroscopy Journal