Diagnostic ultrasonography and MRI have been used to help diagnose carpal tunnel syndrome and exclude other causes of hand and wrist symptoms. These technologies can identify swelling of the median nerve and abnormalities of the tunnel wall, its contents and surrounding area. They can also help determine why the median nerve is being squeezed, or compressed. For example, inflammation of structures in the tunnel like inflamed tendons might be causing the median nerve to be compressed. This can occur in rheumatoid arthritis . Other tendon abnormalities, such as excessive fat in the tunnel (also called a ganglion) also can be seen using MRI.
Primarily talk to us about it before choosing a treatment for your CTS. Try to find out as much as possible about the injection to which you reacted. These injections contain different steroids, varying or no local anaesthetic and other chemicals such as stabilisers and preservatives. For example, the commercial preparation 'Kenalog' used in this area contains not only the steroid (Triamcinolone acetate), but also sodium chloride, benzyl alcohol, carboxymethylcellulose sodium, polysorbate 80 and either sodium hydroxide or hydrochloric acid used to balance the pH (acidity). You may have had an allergic reaction to one of the other components of the injection or you may have reacted to one of the synthetic steroids which are not native to the human body. It does not necessarily follow that you would also react to a different preparation so knowing exactly which preparation you have had a reaction to is a vital piece of information.
Carpal Tunnel Syndrome is a common, painful, progressive condition that is caused by compression of the median nerve at the wrist area. Common symptoms of carpal tunnel syndrome include numbness and tingling sensation in all the fingers except little finger; pain and burning sensation in hand and wrist that may radiate up the arm and elbow; and weakness in hand with diminished grip strength. Exact causes of the condition are not known. However certain factors increase the risk of developing carpal tunnel syndrome and they include congenital abnormalities, repetitive motion of hand and wrists, fractures and sprains, hormonal imbalance, and other medical conditions such as hypothyroidism, rheumatoid arthritis, diabetes, obesity, gout, overactive pituitary gland, or the presence of a cyst or tumour in the canal.