Knee Surgery – when it doesn’t fix the problem

KNEE PAIN: Treat early

RECENT evidence suggests that as many as 20 per cent of patients who have a Total Knee Replacement (TKR) continue to suffer chronic pain after surgery.

The follow up looked into who this 20 per cent might be – are there any common themes?

• Women

• Patients with untreated depression

• Higher pain intensities before surgery

We know women have a higher incidence of chronic pain. We also now know that pain messages in women are conveyed using a different biological system to men. So it makes sense that women don’t respond as well to the pharmaceutical options, the pain persists and then they get caught in the chronic pain loop. There have been a number of studies linking depression to pain. It’s still a bit chicken and egg – does depression make people more sensitive to pain or does the pain lead to depression?

Many NHS pain management clinics in the UK use anti-depressants as part of their pain treatment plan. And then we get to the last one – higher pain intensities before surgery. As I have spoken about on my blog (, patients with chronic pain feel all more pain more strongly (Central Sensitisation). So even though the original cause of pain is resolved (new knee), their system is still overloaded. Let’s walk through this:

• Patient has knee pain

• Patient goes to Doctor and gets pain medication (underlying issue not treated)

• Pain persists and gets worse (because the underlying problem was never treated)

• Pain becomes chronic pain • Doctor refers patient to a surgeon for a knee replacement

• Knee replaced

• Central sensitisation ignored so pain persists.

So I’ve got knee pain…

1. Get treatment early before the pain becomes chronic. And treat the actual problem, don’t just mask it with painkillers.

2. If you have already had a Knee Replacement or other Knee Surgery and are still in pain, get help. You’re not crazy, you’re not making it up. Your entire nervous system needs to be supported and your body needs help to understand that your knee doesn’t need protecting any more (that’s what pain is, a protection signal).

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