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There is no evidence to support the use of ultrasound for the treatment of low back pain, [24] and current clinical guidelines recommend that ultrasound is not used for this condition. [25] In a critical review, it was demonstrated that therapeutic ultrasound was effective in improving pain, function, and cartilage repair in knee osteoarthritis.
The Ottawa knee rules are a set of rules used to help physicians determine whether an x-ray of the knee is needed. [1] They state that an X-ray is required only in patients who have an acute knee injury with one or more of the following: Age 55 years or older; Tenderness at head of fibula; Isolated tenderness of patella
The reflected ultrasound is received by the probe, transformed into an electric impulse as voltage, and sent to the engine for signal processing and conversion to an image on the screen. The depth reached by the ultrasound beam is dependent on the frequency of the probe used. The higher the frequency, the lesser the depth reached. [9]
Medical ultrasound includes diagnostic techniques (mainly imaging techniques) using ultrasound, as well as therapeutic applications of ultrasound. In diagnosis, it is used to create an image of internal body structures such as tendons, muscles, joints, blood vessels, and internal organs, to measure some characteristics (e.g., distances and velocities) or to generate an informative audible sound.
This method of medical ultrasound therapy can be used for various types of pain relief and physical therapy. In physics, the term "ultrasound" [1] applies to all acoustic energy with a frequency above the audible range of human hearing. The audible range of sound is 20 hertz – 20 kilohertz. Ultrasound frequency is greater than 20 kilohertz.
In osteoarthritis, joint injection of glucocorticoids (such as hydrocortisone) leads to short term pain relief that may last between a few weeks and a few months. [5] Injections of hyaluronic acid have not produced improvement compared to placebo for knee arthritis, [ 6 ] [ 7 ] but did increase risk of further pain. [ 6 ]
Treatment typically involves rest and rehabilitation with a physical therapist. [6] Runners may need to switch to activities such as cycling or swimming. [3] Insoles may help some people. [3] Symptoms may last for years despite treatment. [3] Patellofemoral pain syndrome is the most common cause of knee pain, affecting more than 20% of young ...
However, from a practical point of view, false positives that lead to negative X-ray tests were the very thing that the knee rules are trying to address. Nonetheless, the Pittsburgh knee rules offer fewer false positives than do the Ottawa knee rules , though the Ottawa knee rules are more commonly used. [ 2 ]