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Subacromial Impingement SyndromePhase 4Q-EPICAPNCT07692516

Clinical and Economic Evaluation of Point-of-care Ultrasound-guided Infiltration for Subacromial and Carpal Tunnel Syndromes in Primary Care: a Cluster-randomized Study Protocol.

A Phase 4 study testing Standard Oral Treatment, Conventional Infiltration and Ultrasound-Guided Infiltration in people with Subacromial Impingement Syndrome and Carpal Tunnel Syndrome (CTS), run by Fundacio d'Investigacio en Atencio Primaria Jordi Gol i Gurina at 1 site in Spain.

Active, not recruiting

Under way, not looking for participants. Everyone needed has enrolled. The study is still running.

Official record
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Trial summary

The aim of this clinical trial is to determine whether point-of-care ultrasound-guided corticosteroid injection is more effective than conventional injection guided by anatomical landmarks or standard oral medication for patients with upper-extremity conditions (subacromial impingement syndrome [SAS] or carpal tunnel… Read more about this study

Who is it for?
Ages 18 years and older
What is being tested?
Standard Oral Treatment, Conventional Infiltration and Ultrasound-Guided Infiltration
Type of treatment
Pill or oral medicine
Could I receive a placebo?
No, everyone receives an active treatment
How many people
225 participants
Where
1 siteSpain
Study dates
1 Jun 2026to 30 Jun 2028
Phase
Phase 4
Are there results?
Not yet: the study is under way

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 years and older
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Patients aged 18 years or older presenting in primary care. Clinical diagnosis of subacromial impingement syndrome (shoulder pain from tendon compression) or carpal tunnel syndrome (wrist nerve compression). Moderate to severe pain intensity, defined as a score of greater than or equal to 3 on the Visual Analog Scale (VAS >= 3) at baseline. Patient must understand the study procedures and provide written informed consent.

Who cannot join

  • Previous corticosteroid infiltration in the target joint/structure within the last 6 months. History of major trauma, active infection, or previous surgery in the affected shoulder or wrist. Underlying systemic inflammatory diseases (for example, rheumatoid arthritis, polymyalgia rheumatica). Known hypersensitivity or contraindications to corticosteroids (Betamethasone) or local anesthetics (Mepivacaine). Pregnancy or breastfeeding. Red flags suggesting tumor, fracture, or severe neurological deficit.

Trial locations and contacts

1 site in 1 country.

Spain1 site
  • Instituto Universitario de Investigación en Atención Primaria (IDIAP Jordi Gol)

    Lleida, Lleida, 25100

Other trials in Spain

About this study

The aim of this clinical trial is to determine whether point-of-care ultrasound-guided corticosteroid injection is more effective than conventional injection guided by anatomical landmarks or standard oral medication for patients with upper-extremity conditions (subacromial impingement syndrome [SAS] or carpal tunnel syndrome [CTS]) in primary care.

The main questions this study seeks to answer are:

Read more

Does ultrasound-guided injection provide superior long-term pain relief compared to blind anatomical injection and oral medication?

Does ultrasound-guided injection lead to better functional recovery and improved health-related quality of life in patients?

Is ultrasound-guided injection a cost-effective strategy from both the healthcare system and societal perspectives (including reducing sick leave)?

This study represents the quantitative phase of the mixed-methods Q-EPICAP study. Researchers will compare three parallel groups across 23 primary care centers to determine the most effective and efficient treatment strategy.

Participants will:

Receive one of three assigned treatments: blind anatomical infiltration (Group I), ultrasound-guided infiltration (Group UI), or standard oral drug therapy (Group P).

Attend follow-up assessments at baseline and at 15, 30, 90, and 180 days after the initial intervention.

Complete questionnaires to assess pain intensity (Visual Analog Scale), upper limb function (ASES or Boston Disability Assessment Questionnaire), and quality of life (EQ-5D-5L).

Provide data on medical resource utilization and sick leave to assess socioeconomic costs.

Read the detailed description

Upper extremity pathologies, particularly subacromial impingement syndrome (SAS) and carpal tunnel syndrome (CTS), represent a significant clinical and socioeconomic burden for primary care systems, primarily due to functional disability and prolonged sick leave.

Although corticosteroid injections are frequently used, traditional blind injections guided by anatomical landmarks often lack anatomical precision. Point-of-care ultrasound-guided injections offer greater accuracy and better short-term clinical outcomes; however, their cost-effectiveness in routine clinical practice has not yet been adequately assessed.

This pragmatic, prospective, multicenter, cluster-randomized clinical trial includes 23 participating primary care centers (clusters) in Lleida, Spain, with a 6-month longitudinal follow-up. This study constitutes the quantitative phase of the mixed-methods Q-EPICAP project.

A total of 225 adult patients diagnosed with SAS or CTS and presenting with baseline pain (VAS ≥ 3) were divided into three parallel groups:

  1. Group I: Anatomical landmark-guided infiltration.
  2. Group UI: Ultrasound-guided infiltration performed by family physicians.
  3. Group P: Standard oral pharmacological treatment.

Data collection was performed at baseline and at 15, 30, 90, and 180 days post-intervention. The primary outcome measure was pain intensity (VAS). Secondary outcomes included upper limb function (ASES and Boston questionnaires), health-related quality of life (EQ-5D-5L), and a comprehensive economic evaluation (cost-effectiveness and cost-utility indices) that integrates the perspectives of healthcare systems and society.

Being tested
Standard Oral Treatment, Conventional Infiltration, Ultrasound-Guided Infiltration
Keywords
Primary care, Ultrasound-guided infiltration, corticosteroid injection, Pragmatic clinical trial, Cost-effectiveness, Musculoskeletal diseases
Medical subject headings
Shoulder Impingement Syndrome, Carpal Tunnel Syndrome, Agnosia, Musculoskeletal Diseases

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • Standard Oral TreatmentDrug

    Prescription of systemic oral pharmacological treatment according to standard clinical practice and guidelines, which may include individual or combined use of the following therapies, or no pharmacological prescription if deemed appropriate by the clinician:

    1. Non-steroidal anti-inflammatory drugs (NSAIDs): Ibuprofen (400 mg or 600 mg), Naproxen (500 mg or 550 mg), or Dexketoprofen (25 mg).
    2. Non-opioid analgesics: Paracetamol (500 mg, 650 mg, or 1 g) or Metamizole (575 mg).
    3. Step 2 weak opioids: Tramadol (50 mg, 100 mg, or 200 mg).
    4. Co-analgesics for neuropathic pain components: Gabapentin (300 mg, 400 mg, or 600 mg).
  • Conventional InfiltrationDrug

    Local infiltration consisting of a combination of a corticosteroid and a local anesthetic, administered in a 1:1 volume ratio (1 ml + 1 ml, total volume 2 ml):

    1. Corticosteroid: Betamethasone (administered as 1 ml of solution).
    2. Local anesthetic: Mepivacaine (administered as 1 ml of solution).

    In the Conventional Infiltration group, the solution is injected using the standard anatomical landmark technique (blind technique).

  • Ultrasound-Guided InfiltrationDrug

    Local infiltration consisting of a combination of a corticosteroid and a local anesthetic, administered in a 1:1 volume ratio (1 ml + 1 ml, total volume 2 ml):

    1. Corticosteroid: Betamethasone (administered as 1 ml of solution).
    2. Local anesthetic: Mepivacaine (administered as 1 ml of solution). In the Ultrasound-Guided Infiltration group, 1 ml of betamethasone + 1 ml of mepivacaine are administered under real-time ultrasound guidance to ensure precise deposition in the target anatomical structure (subacromial space or carpal tunnel).
Study groups in NCT07692516
Study groupRoleWhat they receive
Standard Oral TreatmentActive comparatorPatients in this cohort are treated exclusively with standard systemic oral drug treatment of routine clinical practice and physiotherapy recommendations according to established clinical guidelines, without receiving local procedures.
Receives: Drug: Standard Oral Treatment
Conventional InfiltrationActive comparatorPatients in this cohort receive a corticosteroid infiltration, blinded to anatomical landmarks, for subacromial impingement syndrome or carpal tunnel syndrome, administered by primary care physicians following standard clinical practice.
Receives: Drug: Conventional Infiltration
Ultrasound-Guided InfiltrationActive comparatorPatients in this cohort receive an ultrasound-guided corticosteroid infiltration, performed by advanced-trained primary care physicians, ensuring anatomical accuracy during the procedure, and following standard clinical practice.
Receives: Drug: Ultrasound-Guided Infiltration

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Change from Baseline in Pain Intensity using the Visual Analog Scale (VAS)

    Pain intensity will be assessed using the Visual Analog Scale (VAS), where patients rate their pain on a line from 0 (no pain) to 10 (worst possible pain). The primary endpoint is the change in the score from baseline to 3, 6, and 9 months. Higher scores indicate greater pain intensity.

    Measured: Baseline (Day 0), 3 months, 6 months, and 9 months post-intervention.

Secondary outcomes (3)
  1. Change from Baseline in Shoulder Function using the American Shoulder and Elbow Surgeons (ASES) Score

    The ASES score evaluates shoulder pain and activities of daily living. It consists of a patient-reported section (10 items) and a clinical assessment. The total score ranges from 0 to 100, where 100 indicates better shoulder function and less pain. We will assess the change in this score relative to baseline.

    Measured: Baseline (Day 0), 3, 6, and 9 months post-intervention.

  2. Change from Baseline in Carpal Tunnel Symptoms and Function using the Boston Carpal Tunnel Questionnaire (BCTQ)

    The BCTQ consists of two scales: the Symptom Severity Scale (11 items) and the Functional Status Scale (8 items). Each item is scored from 1 (mildest) to 5 (most severe). The final score is the average of the responses. Higher scores indicate more severe symptoms and greater functional impairment.

    Measured: Baseline (Day 0), 3, 6, and 9 months post-intervention.

  3. Change from Baseline in Health-Related Quality of Life (EQ-5D-5L)

    The EQ-5D-5L questionnaire assesses 5 dimensions of health (mobility, self-care, usual activities, pain/discomfort, and anxiety/depression) across 5 levels of severity. It also includes a Visual Analog Scale (EQ-VAS) from 0 (worst imaginable health) to 100 (best imaginable health). Higher index values and VAS scores represent better health status.

    Measured: Baseline (Day 0), 3, 6, and 9 months post-intervention.

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted9 Jul 2026
  2. Study start1 Jun 2026
  3. Primary completion31 Dec 2027 (estimated)
  4. Study completion30 Jun 2028 (estimated)

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 4
Primary purpose
Treatment
Allocation
Randomised
Intervention model
Parallel groups
Masking
Single blind
Who is masked
Participant
Enrolment
225 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT07692516
Sponsor's protocol ID
code 22/050-EOm
Other IDs
PROJ-22/13, PIC-26/7
Acronym
Q-EPICAP
Status last verified
Jul 2026
First submitted
2 Jul 2026
Last updated
9 Jul 2026
Results posted
No
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
Yes: Anonymized individual participant data that support the results to be published in the future will be available to qualified researchers who reasonably request them for academic research purposes. Data sharing will be subject to a formal request to the corresponding author, approval from the Institutional Ethics Committee, and the signing of a data access agreement.

Publications

  • Raja SN, Carr DB, Cohen M, Finnerup NB, Flor H, Gibson S, Keefe FJ, Mogil JS, Ringkamp M, Sluka KA, Song XJ, Stevens B, Sullivan MD, Tutelman PR, Ushida T, Vader K. The revised International Association for the Study of Pain definition of pain: concepts, challenges, and compromises. Pain. 2020 Sep 1;161(9):1976-1982. doi: 10.1097/j.pain.0000000000001939.

    PubMed 32694387
  • Jolly M, Curran JJ. Underuse of intra-articular and periarticular corticosteroid injections by primary care physicians: discomfort with the technique. J Clin Rheumatol. 2003 Jun;9(3):187-92. doi: 10.1097/01.RHU.0000073587.90836.23.

    PubMed 17041456
  • Lopez-Marina V, Pizarro-Romero G, Costa-Bardaji N, Mata-Navarro A, Vazquez-Blanco JR. [Evaluation of infiltrations performed in primary care]. Aten Primaria. 2005 Dec;36(10):544-9. doi: 10.1016/s0212-6567(05)70564-3. Spanish.

    PubMed 16507288
  • Soh E, Li W, Ong KO, Chen W, Bautista D. Image-guided versus blind corticosteroid injections in adults with shoulder pain: a systematic review. BMC Musculoskelet Disord. 2011 Jun 25;12:137. doi: 10.1186/1471-2474-12-137.

    PubMed 21702969
  • Korbe S, Udoji EN, Ness TJ, Udoji MA. Ultrasound-guided interventional procedures for chronic pain management. Pain Manag. 2015;5(6):465-82. doi: 10.2217/pmt.15.46. Epub 2015 Sep 24.

    PubMed 26402316
  • Cunnington J, Marshall N, Hide G, Bracewell C, Isaacs J, Platt P, Kane D. A randomized, double-blind, controlled study of ultrasound-guided corticosteroid injection into the joint of patients with inflammatory arthritis. Arthritis Rheum. 2010 Jul;62(7):1862-9. doi: 10.1002/art.27448.

    PubMed 20222114
  • Teunis T, Lubberts B, Reilly BT, Ring D. A systematic review and pooled analysis of the prevalence of rotator cuff disease with increasing age. J Shoulder Elbow Surg. 2014 Dec;23(12):1913-1921. doi: 10.1016/j.jse.2014.08.001.

    PubMed 25441568
  • Chesterton LS, Blagojevic-Bucknall M, Burton C, Dziedzic KS, Davenport G, Jowett SM, Myers HL, Oppong R, Rathod-Mistry T, van der Windt DA, Hay EM, Roddy E. The clinical and cost-effectiveness of corticosteroid injection versus night splints for carpal tunnel syndrome (INSTINCTS trial): an open-label, parallel group, randomised controlled trial. Lancet. 2018 Oct 20;392(10156):1423-1433. doi: 10.1016/S0140-6736(18)31572-1.

    PubMed 30343858
  • Zufferey P, Revaz S, Degailler X, Balague F, So A. A controlled trial of the benefits of ultrasound-guided steroid injection for shoulder pain. Joint Bone Spine. 2012 Mar;79(2):166-9. doi: 10.1016/j.jbspin.2011.04.001. Epub 2011 May 25.

    PubMed 21612965
  • Stewart WF, Ricci JA, Chee E, Morganstein D. Lost productive work time costs from health conditions in the United States: results from the American Productivity Audit. J Occup Environ Med. 2003 Dec;45(12):1234-46. doi: 10.1097/01.jom.0000099999.27348.78.

    PubMed 14665809
  • Reid KJ, Harker J, Bala MM, Truyers C, Kellen E, Bekkering GE, Kleijnen J. Epidemiology of chronic non-cancer pain in Europe: narrative review of prevalence, pain treatments and pain impact. Curr Med Res Opin. 2011 Feb;27(2):449-62. doi: 10.1185/03007995.2010.545813. Epub 2011 Jan 3.

    PubMed 21194394
  • Garnaes KK, Morkved S, Salvesen O, Tonne T, Furan L, Gronhaug G, Vasseljen O, Johannessen HH. What factors are associated with health-related quality of life among patients with chronic musculoskeletal pain? A cross-sectional study in primary health care. BMC Musculoskelet Disord. 2021 Jan 22;22(1):102. doi: 10.1186/s12891-020-03914-x.

    PubMed 33482782
  • Urwin M, Symmons D, Allison T, Brammah T, Busby H, Roxby M, Simmons A, Williams G. Estimating the burden of musculoskeletal disorders in the community: the comparative prevalence of symptoms at different anatomical sites, and the relation to social deprivation. Ann Rheum Dis. 1998 Nov;57(11):649-55. doi: 10.1136/ard.57.11.649.

    PubMed 9924205
  • Luime JJ, Koes BW, Hendriksen IJ, Burdorf A, Verhagen AP, Miedema HS, Verhaar JA. Prevalence and incidence of shoulder pain in the general population; a systematic review. Scand J Rheumatol. 2004;33(2):73-81. doi: 10.1080/03009740310004667.

    PubMed 15163107
  • Franzblau A, Werner RA. What is carpal tunnel syndrome? JAMA. 1999 Jul 14;282(2):186-7. doi: 10.1001/jama.282.2.186. No abstract available.

    PubMed 10411203

Questions about this trial

What is this clinical trial studying?

A Phase 4 study testing Standard Oral Treatment, Conventional Infiltration and Ultrasound-Guided Infiltration in people with Subacromial Impingement Syndrome and Carpal Tunnel Syndrome (CTS), run by Fundacio d'Investigacio en Atencio Primaria Jordi Gol i Gurina at 1 site in Spain.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 1 inclusion and 1 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: under way, not looking for participants, as of the sponsor's last update on 9 Jul 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in Spain. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Phase 4 studies take place after a treatment is approved, to learn more about its long-term benefits and risks in everyday use.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

This study is still under way. Results are not available in the source record yet.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Change from Baseline in Pain Intensity using the Visual Analog Scale (VAS) (time frame: Baseline (Day 0), 3 months, 6 months, and 9 months post-intervention.). It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT07692516, which also lists 21 linked publications.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 9 Jul 2026.

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