Hyaluronic Acid After Knee Lavage: Why We Prefer This Sequence in Selected Patients
Hyaluronic Acid After Knee Lavage: Why We Prefer This Sequence in Selected Patients
Knee osteoarthritis is associated with pain, stiffness, inflammation, swelling and progressive changes within the joint environment. In daily practice, patients commonly present with pain while walking or climbing stairs, stiffness after sitting, difficulty with prolonged standing and gradual reduction in their normal activities.
Knee preservation is most useful when treatment is planned before the joint reaches advanced structural damage. At N K Aggarwal Joints & Spine Centre, Ludhiana, we use a multimodal approach in selected patients, and one of the treatment sequences we prefer is knee lavage followed by High Molecular Weight Hyaluronic Acid (HA) and other injectables.
The rationale is straightforward. Lavage and HA have different roles. Lavage addresses the intra-articular environment mechanically, while HA is subsequently used to support lubrication and the viscoelastic properties of the joint fluid.
Why Give HA After Knee Lavage?
Synovial fluid contains Hyaluronic Acid, which contributes to the lubrication and viscoelastic behaviour of the knee. In osteoarthritis, the concentration, molecular weight and functional properties of endogenous HA are altered.
During joint lavage, the knee is irrigated and the existing joint fluid is removed along with wear and tear products from meniscus and articular cartilage. The proinflammatory enzymes are also flushed out with lavage. Earlier clinical evidence has also reported improvement in pain and inflammatory signs following arthroscopic lavage, with greater pain relief observed in knees with less advanced radiographic changes.[3] This provides a clinical rationale for introducing HA after lavage, particularly when the objective is to restore a more favourable intra-articular environment following the procedure. In our practice, therefore, HA is not viewed simply as an injection for pain. When lavage is indicated, we consider HA afterward as the next component of the treatment sequence.
What Does the Clinical Evidence Show?
One of the most directly relevant clinical studies was published by Hempfling in Knee Surgery, Sports Traumatology, Arthroscopy. The study included 80 patients undergoing arthroscopic knee lavage for persistent symptoms.
Patients were divided into two groups. One group underwent lavage alone, while the other received lavage followed immediately by an intra-articular injection of sodium Hyaluronate.
Both groups experienced improvement in walking pain and walking ability following treatment. However, the pattern during follow-up was different. At three months, the improvement was less well maintained in the lavage-only group, while the group receiving HA after lavage maintained its improvement. The difference in favour of the HA group was also observed during longer follow-up.[1] This study is particularly relevant to our approach because it evaluates the sequence of lavage followed by HA, rather than simply studying HA as an isolated injection.
Is the Benefit Only About Immediate Pain Relief?
Not necessarily. The clinical rationale for this combination is not that lavage and HA necessarily produce a dramatically different immediate pain response. The potential value lies in what happens after the procedure. Lavage changes the intra-articular environment mechanically, while HA provides a viscoelastic and lubricating component afterward. In the randomized study, the additional HA treatment was associated with better maintenance of clinical improvement during follow-up compared with lavage alone.[1]
Lavage Is Not Required Before Every HA Injection
This distinction is important.
The decision to perform lavage and the decision to administer HA are separate clinical decisions. We do not perform lavage merely because an HA injection is being considered.
Lavage is considered when the clinical condition of the knee provides a reason for the procedure. Long-term follow-up data have also suggested that patient selection is important. Jackson and Dieterichs reported that patients with earlier-stage degenerative changes experienced more sustained symptomatic relief after arthroscopic lavage and debridement, whereas the response in more advanced disease was often temporary and less predictable.[4] In selected patients undergoing lavage as part of a knee-preservation strategy, we prefer to follow it with High Molecular Weight HA to support the joint environment after irrigation. This approach is therefore different from saying that every patient with osteoarthritis requires arthroscopic lavage. Large placebo-controlled research has shown that routine arthroscopic lavage or debridement does not provide clinically meaningful benefit for uncomplicated knee osteoarthritis.[2] Our use of lavage is therefore selective and is based on broader clinical assessment.
How This Fits Into the Ludhiana Protocol
At N K Aggarwal Joints & Spine Centre, Ludhiana, knee preservation is approached as a multimodal treatment strategy rather than a single-injection treatment. When lavage is clinically indicated, we prefer to administer High Molecular Weight Hyaluronic Acid afterward. The purpose is to combine the mechanical component of lavage with the lubricating and viscoelastic properties of HA.
Depending on the condition of the individual knee, other components such as PRP/Growth Factor Concentrate, correction of abnormal mechanical loading, rehabilitation and other supportive treatments may also be incorporated. The sequence is individualized according to the patient’s symptoms, clinical examination, imaging, severity of osteoarthritis, alignment and functional requirements.
Who May Be Considered?
This approach is considered primarily when knee preservation remains a reasonable clinical objective. Patients with early or moderate structural disease may have different treatment requirements from patients with severe bone-on-bone arthritis, major deformity or extensive structural damage. Age alone does not determine treatment. The condition of the joint, the pattern of symptoms and the patient’s functional requirements are considered before deciding whether lavage, HA or a combination of treatments is appropriate.
[1] Hempfling H. Intra-articular hyaluronic acid after knee arthroscopy: a two-year study. Knee Surg Sports Traumatol Arthrosc. 2007;15(5):537-546.
PubMed: https://pubmed.ncbi.nlm.nih.gov/17187274/
[2] Moseley JB, et al. A controlled trial of arthroscopic surgery for osteoarthritis of the knee. N Engl J Med. 2002;347:81-88.
DOI: https://doi.org/10.1056/NEJMoa013259
[3] Livesley PJ, Doherty M, Needoff M, Moulton A. Arthroscopic lavage of osteoarthritic knees. J Bone Joint Surg Br. 1991;73(6):922-926. doi:10.1302/0301-620X.73B6.1720118. PubMed: https://pubmed.ncbi.nlm.nih.gov/1720118
[4] Jackson RW, Dieterichs C. The results of arthroscopic lavage and debridement of osteoarthritic knees based on the severity of degeneration: a 4- to 6-year symptomatic follow-up. Arthroscopy. 2003;19(1):13-20. doi:10.1053/jars.2003.50022. PubMed: https://pubmed.ncbi.nlm.nih.gov/12522398