In follow-up to a previous blog from October 2015 regarding prolotherapy in the treatment of rotator cuff disorders, another study was recently published showing positive results.
Lee et al (Arch Phys Med Rehab 2015) performed a retrospective case-control study evaluating prolotherapy in the treatment of rotator cuff disease. In this study, 63 patients received prolotherapy, consisting of 16.5% dextrose solution and 63 patients received conservative treatment. The outcome measures of the study included the visual analog scale (VAS), average shoulder pain score for the past week, Shoulder Pain and Disability Index Score, active range of shoulder motion, isometric shoulder strength, and medication (analgesic) use per day. At one year of follow-up, patients in the prolotherapy group received an average of 4.8 ± 1.3 injections and had significant improvements in VAS, SPADI scores, isometric strength, and active range of motion when compared with the control group.
As the authors pointed out, prolotherapy appeared to be effective in the treatment of chronic rotator cuff disease (duration of at least 3 months), however, as this study was non-randomized and retrospective in nature, the results must be interpreted with caution.
This is the second recent study to conclude that dextrose prolotherapy is efficacious in the treatment of rotator cuff disease. Bertrand et al (Arch Phys Med Rehab 2016) showed that injections of hypertonic dextrose resulted in superior long term pain improvement and patient satisfaction for those with painful rotator cuff tendinopathy. As with many prolotherapy investigations, it is often difficult to compare studies as the specific diagnosis from one study to another often differs as does the treatment protocol and outcome measures. Nonetheless, prolotherapy does appear to be beneficial for a number of musculoskeletal condition with no reported adverse events.