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While medical ultrasound is used to visualize soft tissues like skin, organs, and blood vessels, fracture sonography is used to visualize fractures on only bone surfaces. It is useful for children aged 12 or younger because all fractures cause alterations of the bone surface, and joint fractures are uncommon at such ages. [ 1 ]
The correction factors are attempts to discount the contribution of the humerus. By comparing MUAMA values against computed tomography , studies by Heymsfield et al. found that, at the maximum circumference of the triceps, the contribution of bone to the total cross-sectional area was 18% in men and 17% in women, which were 10 cm 2 and 6.5 cm 2 ...
The transducer is typically separated from the test object by a couplant [4] such as a gel, oil or water, [1] as in immersion testing. However, when ultrasonic testing is conducted with an Electromagnetic Acoustic Transducer (EMAT) the use of couplant is not required. There are two methods of receiving the ultrasound waveform: reflection and ...
In a second study of patients with continuing shoulder instability after trauma, and using double contrast CT as a gold standard, a sensitivity of over 95% was demonstrated for ultrasound. [5] It should be borne in mind that in both those studies, patients were having continuing problems after initial injury, and therefore the presence of a ...
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.
A humerus fracture is a break of the humerus bone in the upper arm. [1] Symptoms may include pain, swelling, and bruising . [ 1 ] There may be a decreased ability to move the arm and the person may present holding their elbow. [ 2 ]
When performing the Neer impingement test, the elbow should be extended, humerus in internal rotation and the forearm pronated. When the examiner is passively flexing the arm forward, it is causing compression of the structures between the greater tuberosity, inferior acromion process and the acromioclavicular joint. [1]
The sign is an imaging finding using a 3.5–7.5 MHz ultrasound probe in the fourth and fifth intercostal spaces in the anterior clavicular line using the M-Mode of the machine. This finding is seen in the M-mode tracing as pleura and lung being indistinguishable as linear hyperechogenic lines and is fairly reliable for diagnosis of a pneumothorax.