Barbotage is an ultrasound-guided procedure in which a needle is placed into a calcific deposit within a tendon, saline is injected and withdrawn repeatedly to break up and wash out the calcium, and the aspirated material is removed. It is also called ultrasound-guided percutaneous lavage (UGPL) or needling and lavage, and in sport and exercise medicine (SEM) it is used almost entirely for calcific tendinopathy of the rotator cuff, most often in the supraspinatus tendon. The procedure aims to fragment or remove a clinically relevant deposit, although the relationship between clearing the deposit and relieving symptoms is imperfect, since calcific deposits are often found in shoulders that do not hurt. This page covers the technique, what the evidence shows about short and long-term benefit, and how it sits alongside the other options for calcific disease.
How is barbotage performed?
The procedure is performed under ultrasound guidance because the target is small and the tendon must not be damaged unnecessarily. The deposit is identified on scanning, the skin is prepared aseptically, local anaesthetic is infiltrated along the planned path, and a needle is advanced in-plane into the deposit. Saline is then injected and allowed to reflux back into the syringe, repeatedly, so that the calcium is progressively broken up and washed out; the returning fluid becomes cloudy with suspended calcium, which is a sign that calcific material is being retrieved rather than a predictor of clinical benefit. Softer, toothpaste-like deposits lavage readily, whereas dense, hard deposits are more difficult and may yield little, which is one of the main practical limitations of the procedure and a reason for assessing the deposit on ultrasound beforehand. Single-needle and two-needle techniques are both described. A subacromial-subdeltoid corticosteroid injection is included at the end of the procedure in some protocols, on the basis that a post-procedure inflammatory flare in the bursa can occur, although this is protocol-dependent rather than an established evidence-based requirement.
A needle is placed into the calcific deposit under ultrasound guidance. Saline is injected and withdrawn repeatedly so that calcium is broken up and washed out into the syringe.
Aftercare is straightforward but the warning matters. Patients are told that a flare of pain in the first day or two can occur and should be discussed in advance, that simple analgesia and relative rest are usually enough, and that escalating pain with fever or a hot, swollen shoulder needs urgent assessment rather than reassurance. A sling is not routinely needed, gentle range of movement is encouraged early, and a progressive rotator cuff rehabilitation programme follows. Complications are otherwise uncommon: infection is rare with aseptic technique, and a vasovagal episode during the procedure is probably the most frequent problem. Repeat barbotage is possible where a deposit persists and symptoms recur, but a failure to improve should prompt reassessment of the diagnosis rather than an automatic repeat.
What does the evidence show?
The evidence has changed, and the change matters. Earlier active-comparator studies suggested improved pain, function and resorption of the deposit, with outcomes at least as good as subacromial corticosteroid injection alone in the first six to twelve months. Those studies compared barbotage against another active treatment rather than against a placebo procedure, so they could not separate the effect of the lavage from natural recovery or from the substantial placebo response to an elaborate ultrasound-guided intervention. A pragmatic three-arm, double-blind, sham-controlled randomised trial subsequently compared ultrasound-guided lavage with corticosteroid injection, sham lavage with corticosteroid injection, and sham treatment, with follow-up to twenty-four months, and found no clinically important benefit for either active arm over sham treatment, leading its authors to conclude that the results challenge the clinical utility of these commonly used interventions. Taken together the evidence is heterogeneous and conflicting and does not confidently establish a specific treatment effect for lavage. Two further cautions follow. Earlier comparative follow-up suggested that any between-group advantage was not maintained in the longer term, which is consistent with the often self-limiting natural history but does not by itself prove that lavage accelerates natural recovery. Separately, clearance of the deposit on imaging should not be equated with symptom improvement, since deposits are frequently present in asymptomatic shoulders.
A three-arm, double-blind, sham-controlled trial found no clinically important benefit for ultrasound-guided lavage with corticosteroid, or for sham lavage with corticosteroid, over sham treatment.
How barbotage sits against the alternatives is a common exam theme and requires care, because the UK guidance position differs by procedure. First-line management remains analgesia, activity modification and a progressive rehabilitation programme. Subacromial corticosteroid injection is widely used for symptom control, particularly during a painful resorptive phase. For extracorporeal shockwave therapy, current UK guidance concludes that efficacy evidence in calcific tendinopathy of the shoulder is inadequate and that the procedure should be used only in the context of research, so it cannot be presented as an established alternative in UK practice even though the older literature often described calcific disease as its best indication. Surgical removal is reserved for genuinely recalcitrant cases. Patient selection matters more than technique: symptoms, examination findings and imaging should be clinically concordant, while recognising that causation cannot be proved from the presence of a deposit alone, and the deposit should be accessible and not so dense as to be unlavagable. Given the sham-controlled evidence, barbotage is best presented as an option requiring an explicit discussion of conflicting evidence rather than as an established procedure with demonstrated benefit, with consent documented and outcomes audited where it is offered.
Exam Tips
•Barbotage, also called ultrasound-guided percutaneous lavage (UGPL), places a needle in a calcific deposit and repeatedly injects and withdraws saline to break up and wash out calcium.
•It is used almost entirely for rotator cuff calcific tendinopathy, most often supraspinatus, and is performed under ultrasound guidance.
•Soft deposits lavage readily; dense deposits are difficult and may yield little, so assess the deposit beforehand, and remember that clearing a deposit on imaging does not reliably equate to symptom improvement.
•A subacromial-subdeltoid corticosteroid injection is included at the end in some protocols because a post-procedure bursal flare can occur, but this is protocol-dependent rather than established.
•A three-arm, double-blind, sham-controlled trial found no clinically important benefit for lavage with corticosteroid, or for sham lavage with corticosteroid, over sham treatment, so the overall evidence is conflicting.
•Current UK guidance restricts shockwave therapy for calcific shoulder tendinopathy to the context of research, so it is not an established alternative in UK practice.