Thousands of NHS patients have allegedly suffered complications after receiving the NexGen knee-replacement implant, with reports indicating that the device's flaws were known for years. Patients have reported experiencing debilitating immobility and becoming dependent on painkillers following the surgery. The situation raises serious questions about the oversight and approval processes for medical devices within the NHS, as well as the transparency surrounding potential risks to patient safety. Further investigation is expected to determine the full extent of the issue and whether adequate steps were taken to mitigate harm.