An interventional study of Active Dry Needling and Sham Dry needling in Chronic Shoulder Pain, sponsored by University of Gran Rosario. Completed at 1 site in Argentina. Open to participants aged 18 Years to 35 Years. Per ClinicalTrials.gov, last updated 2021-11-30.
Sponsored by University of Gran Rosario · Not applicable, Interventional, and Treatment
The aim of the study is to evaluate the effects of active dry needling (aDN) in the treatment of myofascial trigger points of the infraspinatus muscle (MTP). For this purpose, this technique was compared to placebo dry needling (pDN) for short-term pain relief and increased glenohumeral internal rotation range. The second objective is to explore whether improvements in perceived pain and functional capacity correlate with changes in electromyographic activity.
This study is a randomized, double-blind, placebo-controlled clinical trial comprising a sample of 30 volunteers with unilateral shoulder pain of both sexes, aged 18 to 35 years. They were clinically evaluated to assess inclusion and exclusion criteria. For inclusion in the study, volunteers had unilateral shoulder pain for more than 3 months and were symptomatic at the time of evaluation. The volunteers were randomized into two groups (G1: active dry needling) versus (G2: placebo dry needling). The procedure was performed by one investigator, while outcome measures (pressure pain thresholds, VAS, glenohumeral internal rotation deficit, and muscle activity) were assessed by other investigators, ensuring a double-blinded evaluation of the experiment. Volunteers were recruited through social networks and emails. The study was conducted in two experimental sessions on separate days, at least 48-72 hours apart to avoid carry-over effects. Primary and secondary outcomes were assessed at baseline, immediately after and 48-72 hours after dry needling.
Assessment of infraspinatus and middle deltoid muscle activity was performed by electromyography (EMG). For the EMG protocol, the patient remained standing while holding a distal load, the magnitude of which depended on the patient's weight. In patients weighting less than 68 kg, a load of 1.5 kg was used; those weighting more than 68 kg lifted 2.5 kg. After a brief familiarization period, patients were asked to perform 5 repetitions of shoulder elevation in a scapular plane with external rotation and elbow extended, ranging from 30° to 90°. EMG recordings were taken during the ascent and descent, with a duration of 3 seconds at each stage. The movement was synchronized using a metronome so that there was as little variability as possible between participants.
The study is original and there are no previously published data available. Thus, data obtained from the pilot study were used for sample size calculation. The variable with the lowest coefficient of determination (R-squared) was considered as a primary outcome (pain perceived by visual analog scale), and applied as input for the calculation. The analysis was performed with an effect size of 0.76, an alpha of 5% and a power of 95%. The results indicated that a total of 22 volunteers were needed. Assuming a loss of 20%, each group consists of 14 volunteers (with a total sample of 28 volunteers). The sample calculation was performed using the G-Power 3.1.9.7 software.
The study was pre registered in the brazilian database (www.ensaiosclinicos.gov.br) before starting data collection, although identifier were not provided.
707 studies on the registry are indexed under Shoulder Pain; 152 are open to participants now.
This study's enrollment of 30 is below the median of 60 across 561 interventional studies indexed under Shoulder Pain.
Browse Shoulder Pain studies →University of Gran Rosario is the lead sponsor of 16 studies on the registry; 5 are open to participants now.
Counted across the registry records on this site, refreshed daily.
Exclusion Criteria:
Active dry needling (ADN). Intramuscular insertion Intervention/treatment. All participants in this group received an ADN session with an intramuscular insertion of a 25 mm X 0.22 mm JEMCO acupuncture needle into the infraspinatus muscle. The dry needling was performed with the rapid entry and exit technique.
Other: Active Dry Needling
Sham dry needling (SDN). All participants in this group received one session of SDN with a 25 mm X 0.22 mm JEMCO acupuncture needle over the infraspinatus region. To ensure that the blunt needles did not puncture the skin during the experimental session (and for patient comfort), each needle was individually cut and polished and checked for sharpness against the investigator's fingertip. As a precaution against infection, each patient was treated with a separate dummy needle.
Other: Sham Dry needling
All participants in this group received an ADN session with an intramuscular insertion of a 25 mm X 0.22 mm acupuncture needle into the infraspinatus muscle. The dry needling was performed with the rapid entry and exit technique.
All participants in this group received one session of SDN with a 25 mm X 0.22 mm acupuncture needle over the infraspinatus region. To ensure that the blunt needles did not puncture the skin during the experimental session (and for patient comfort), each needle was individually cut and polished and checked for sharpness against the investigator's fingertip. As a precaution against infection, each patient was treated with a separate dummy needle.
Change in Pain intensity
The Visual Analogue Scale (VAS) was used to assess pain intensity. This scale consists of a sequence of numbers from 0 to 10, in which 0 represents "no pain" and 10 represents "worst pain imaginable".
Time frame: At baseline, immediately after the intervention, 72 hours after the intervention
Change in Pressure Pain Threshold
Pressure Pain Thresholds (PPT) were quantified bilaterally through a pressure algometer at the medial portion of the infraspinatus muscle and at the medial portion of the deltoid muscle. Three measurements were taken at intervals of 30 seconds and the mean value was recorded. To determine PPT, the pressure was increased at a rate of approximately 1 kg/second. Patients were asked to raise their arm when they perceived the pressure changing to pain, stopping the estimation at this point.
Time frame: At baseline, immediately after the intervention, 72 hours after the intervention
Changes in Range of motion
The examiners assessed both shoulder's internal rotation range of motion with an inclinometer.
Time frame: At baseline, immediately after the intervention, 72 hours after the intervention
Changes in EMG activity
Electrical activity from infraspinatus and deltoid muscles was recorded using surface electromyography (sEMG). The signal was normalized using the maximal isometric voluntary contraction (MIVC). The sEMG data were collected during a shoulder elevation task. Electrode placement, data collection and processing were performed according to Surface ElectroMyoGraphy for the Non-Invasive Assessment of Muscles standards.
Time frame: At baseline, immediately after the intervention, 72 hours after the intervention
Plan to share: Undecided
No publications or documents are linked to this record.
This study is completed, as verified in Nov 2021. You cannot join it, but the record below documents what was studied.
Get an email when the registry record changes — status, dates, results — or when someone posts here.
Sign in to followQuestions and observations about this study, from anyone following it. Not medical advice, and not a channel to the study team — their contact details are on the registry record.
Sign in to join the discussion. Reading takes no account; posting does. You choose a display name, and a pseudonym is the default.
Nothing here yet. If you are running this trial, taking part in it, or weighing whether to, this is the place to say so.
University of Gran Rosario