Shoulder joint injections are commonly used for certain conditions such as osteoarthritis, frozen shoulder, or tendonitis. The administration of the injection to the shoulder joint depends upon the condition to be treated. The approach for application of the injection may be anterior, posterior, superior or inferior aspect of the joint.
During an ultrasound guided injection, the patient will be asked to lie or sit down on a table depending on the site of the injection. A clear water based conducting gel is applied over the skin to assist with transmission of the sound waves. The doctor moves a hand-held probe, called a transducer, over the targeted area. The transducer emits sound waves and detects the rebound echoes from the tissue. Images are created from these sound waves and can be viewed on the video display screen attached to the scanner. The waves provide a clear view of the targeted area and helps the doctor locate the correct site for injection.