ð Module Overview
Learning Objectives
On completion of this module, you will be able to:
- Define osteoarthritis (OA) as a disease of the whole joint, not just 'wear and tear'.
- Confidently make a clinical diagnosis of OA based on NICE criteria, without the need for an X-ray.
- Describe and advocate for the three core treatments for all patients with OA: education, exercise, and weight loss.
- Apply the NICE analgesic ladder for OA, understanding the roles and risks of topical NSAIDs, paracetamol, and oral NSAIDs.
- Counsel patients on common misconceptions about OA and its management.
- Understand the criteria for referral for joint replacement surgery.
Key Messages for Practice
- OA is a disease of the whole joint: It is not simply 'wear and tear'. It is a failed repair process affecting cartilage, bone, ligaments, and muscle.
- Diagnosis is Clinical: For patients over 45 with typical symptoms, a diagnosis can be made without an X-ray. X-ray findings correlate poorly with pain.
- Core Treatments are Key: The most effective interventions are education, exercise, and weight loss. These should be offered to every patient.
- Pharmacology is an Adjunct: Painkillers help manage symptoms to enable exercise, they do not treat the underlying process.
- 'Motion is Lotion': Exercise does not 'wear out' joints; it strengthens the muscles that support them and improves pain and function.
ð Diagnosis & Assessment NICE NG226
Osteoarthritis is the most common form of arthritis, with the knee being the most frequently affected joint. It's crucial to understand that the diagnosis is clinical, and routine imaging is often unhelpful and not recommended.
Making a Clinical Diagnosis
NICE Criteria for a Clinical Diagnosis of OA
A working diagnosis can be made without an X-ray if the patient is:
- Aged 45 or over
AND - Has activity-related joint pain
AND - Has either no morning stiffness or stiffness that lasts no longer than 30 minutes.
This approach has a high diagnostic accuracy and avoids unnecessary radiation and patient anxiety from imaging.
Risk Factors
| Modifiable | Non-modifiable |
|---|---|
| Obesity, Previous joint injury, Occupational stress (e.g., farming), High-impact sports, Knee extensor muscle weakness | Advancing age, Female sex (for knee/hand OA), Genetic predisposition, Congenital joint deformity |
ðŠ Core Treatments: The Foundation of Care
NICE recommends that every patient with OA, irrespective of age, comorbidity, or pain severity, should be offered three core treatments. Pharmacology is an adjunct to these, not a replacement.
| Core Treatment | Key Actions and Counselling Points |
|---|---|
| 1. Information & Education |
|
| 2. Exercise |
|
| 3. Weight Loss |
|
ð Pharmacological Management (Adjunctive)
Pharmacological treatments are for managing symptoms, particularly 'flares', to enable patients to engage with the core treatments. The approach should be stepwise.
| Step | Treatment Option | Key Considerations |
|---|---|---|
| Step 1 | Paracetamol and/or Topical NSAIDs (for knee/hand OA). |
Evidence for paracetamol is weak (NNT~7), but it is safe. Stop if no benefit. Topical NSAIDs are effective (NNT 2-3 for acute pain) and much safer than oral NSAIDs. Should be first-line for knee/hand OA. |
| Step 2 | Oral NSAIDs or COX-2 inhibitors. | Use the lowest effective dose for the shortest possible duration. Always assess GI, CV, and renal risk first. Co-prescribe a PPI for at-risk patients. Naproxen is preferred for CV safety. |
| Step 3 | Opioids (with extreme caution). | Opioids should only be considered for short-term management of severe pain when other options have failed. They have a poor evidence base in OA and significant risks. Long-term use should be avoided. |
| Specialist | Intra-articular corticosteroid injections. | Can provide good short-term (up to 8 weeks) pain relief, which can be useful for a severe flare or to enable physiotherapy. Benefit is not sustained. |
What about other treatments?
- Glucosamine & Chondroitin: NICE does NOT recommend these due to a lack of evidence of benefit.
- Hyaluronic Acid Injections: NICE does NOT recommend these.
- Acupuncture: NICE does NOT recommend acupuncture for osteoarthritis.
ðŠ Surgical Management
Surgery is reserved for patients with advanced OA whose symptoms are having a substantial impact on their quality of life, and who have not responded to an adequate trial of core and pharmacological treatments.
Referral Criteria
- The decision to refer should be made through shared decision-making with the patient.
- Referral should be based on the impact of the symptoms on the patient's life, not on their age, gender, comorbidities, or X-ray findings alone.
- Patients should be referred before there is prolonged and established functional limitation, as this can lead to poorer surgical outcomes.
Procedures
- Arthroscopy: Arthroscopic lavage and debridement is NOT recommended by NICE for OA. It has been shown to be no better than placebo.
- Joint Replacement (Arthroplasty): A highly effective procedure for end-stage OA. 95% of hip replacements and 82% of knee replacements last for 25 years. However, dissatisfaction rates can be up to 20% for knee replacements.
ðĪ Lifestyle & Support Resources
Empowering patients with good quality information is a core part of OA management.
OA Self-Management Resources
- Versus Arthritis: The leading UK charity, providing excellent leaflets, exercise videos, and support for people with OA.
- NHS - Osteoarthritis: A useful overview of the condition, its symptoms, and treatments.
- ESCAPE-pain: An evidence-based rehabilitation programme for people with hip and knee OA, often available on NHS referral.
- NHS Eat Well: Provides guidance and support for weight management.
ðŊ OSCE Preparation
Counselling a Newly Diagnosed OA Patient
Scenario: A 58-year-old patient has just been diagnosed with knee OA by their GP. They tell you, "I'm so worried. My mum was crippled by arthritis. I suppose I have to stop exercising now to stop it wearing out more, and just take painkillers until I need a replacement."
Key Communication & Counselling Steps:- Acknowledge and Validate: "It's completely understandable to be worried when you get a new diagnosis like this, especially when you've seen what your mum went through. Thank you for sharing that with me."
- Educate & Reframe (Counter Misconceptions): "The good news is that our understanding of arthritis has changed a lot. We no longer see it as just 'wear and tear'. It's more of a problem with the joint's natural repair process. The most important thing is that there's a huge amount we can do to manage it."
- Promote the Core Treatments (Exercise): "The most powerful treatment we have is actually exercise. It might seem counter-intuitive, but exercise doesn't wear the joint out; it makes it stronger by building up the muscles that support it. This reduces pain and improves how you can move. Gentle activities like walking, cycling, or swimming are brilliant."
- Promote the Core Treatments (Weight): "The other key thing is maintaining a healthy weight. Every extra pound you carry puts about four extra pounds of pressure through your knees, so even losing a small amount of weight can make a massive difference to your pain."
- Explain the Role of Medicines: "Painkillers are there to help on bad days, or to take the edge off so you feel able to do your exercises. They are an 'add-on' to help you stay active, not the main treatment itself. A topical gel is often the best place to start."
- Summarise and Empower: "So, the key message is that you are in control. By keeping active and managing your weight, you can have a huge impact on your symptoms and may never need a joint replacement. It's not an inevitable path."
â Bonus: Clinical Pharmacist Case Study
The Patient: The High-Risk NSAID Request
Patient Profile: Mr. Smith, 68, has knee OA, hypertension, and a history of a peptic ulcer 10 years ago. He is taking amlodipine and ramipril.
The Challenge: He asks to buy a pack of naproxen 250mg tablets, stating that paracetamol isn't touching his knee pain.
Pharmacist's Consultation & Plan (SOAP Note Format)
- Subjective: Patient with knee OA and inadequately controlled pain on paracetamol, requesting an oral NSAID.
- Objective: Patient has multiple risk factors for both GI and renal adverse effects from oral NSAIDs: age >65, history of PUD, and concurrent use of an ACE inhibitor (ramipril).
- Assessment:
- The patient is at high risk of a serious GI bleed if he takes oral naproxen without gastroprotection.
- The patient is at increased risk of Acute Kidney Injury (AKI) due to the combination of an NSAID and an ACE inhibitor.
- A topical NSAID would be a much safer and equally effective alternative for his knee OA.
- Plan:
- Intervention: Strongly advise against the purchase of oral naproxen at this time.
- Counselling & Recommendation: Explain the risks clearly. "Mr. Smith, because of your age and your past stomach ulcer, taking naproxen tablets carries a high risk of causing another serious bleed. Also, combining them with your ramipril can sometimes affect the kidneys. However, for knee pain, we have a much safer option. A topical ibuprofen or diclofenac gel is just as effective for the knee but avoids all those internal risks."
- Education: Explain that the gel works locally on the knee and very little gets into the rest of the body. Counsel on correct application (regularly, 3-4 times a day).
- Safety-Netting and Referral: "I would strongly recommend you try the gel first. If after a couple of weeks of regular use your pain is still not controlled, you should see your GP. They can assess you properly and might decide to prescribe you an oral tablet along with a stomach-protecting medicine, but that's a decision they need to make after weighing up all the risks."