Christopher D. Brown, Christine A. lauber and Thomas Cappaert
Iontophoresis is a method of local transfer of ionized medicated and nonmedicated substances through the skin and into the target tissues using magnetic polarization. The anti-inflammatory properties exhibited by dexamethasone sodium phosphate (DEX) combined with iontophoresis make it a potentially desirable treatment for clinicians wishing to administer a noninvasive localized drug concentration without having a large systemic concentration of that drug. Since concurrent treatments are commonly used in clinical practice, many of the published studies that included the use of DEX also used concurrent treatments. However, this may make it difficult for clinicians to determine the individual effectiveness of DEX iontophoresis in treating musculoskeletal conditions.
Focused Clinical Question:
Does DEX iontophoresis, alone, decrease pain and improve function in patients with musculoskeletal conditions when compared with placebo or control?
Christopher D. Brown and Christine A. Lauber
Cody B. Bremner, William R. Holcomb, Christopher D. Brown and Melanie E. Perreault
Orthopedic knee conditions are regularly treated in sports-medicine clinics. Rehabilitation protocols for these conditions are often designed to address the associated quadriceps strength deficits. Despite these efforts, patients with orthopedic knee conditions often fail to completely regain their quadriceps strength. Disinhibitory modalities have recently been suggested as a clinical tool that can be used to counteract the negative effects of arthrogenic muscle inhibition, which is believed to limit the effectiveness of therapeutic exercise. Neuromuscular electrical stimulation (NMES) is commonly accepted as a strengthening modality, but its ability to simultaneously serve as a disinhibitory treatment is not as well established.
Does NMES effectively enhance quadriceps voluntary activation in patients with orthopedic knee conditions?
Summary of Key Findings:
Four randomized controlled trials (RCTs) met the inclusion criteria and were included. Of those, 1 reported statistically significant improvements in quadriceps voluntary activation in the intervention group relative to a comparison group, but the statistical significance was not true for another study consisting of the same sample of participants with a different follow-up period. One study reported a trend in the NMES group, but the between-groups differences were not statistically significant in 3 of the 4 RCTs.
Clinical Bottom Line:
Current evidence does not support the use of NMES for the purpose of enhancing quadriceps voluntary activation in patients with orthopedic knee conditions.
Strength of Recommendation:
There is level B evidence that the use of NMES alone or in conjunction with therapeutic exercise does not enhance quadriceps voluntary activation in patients with orthopedic knee conditions (eg, anterior cruciate ligament injuries, osteoarthritis, total knee arthroplasty).
Christopher D. Brown, Kim Keeley and Kelly Potteiger
Kelly Potteiger, Christopher D. Brown and Kim Keeley