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An individual professionally trained to use ultrasound in the setting of other available clinical information to obtain images of anatomical structures, physiological processes, and disease states for diagnostic purposes. In the U.S., professional societies of sonographers include the Society of Diagnostic Medical Sonographers and the American Society of Echocardiography. Professionally certified sonographers are credentialed by…

Exposure to high-frequency sound waves. The technique is used to destroy bacteria, hemolyze blood, and loosen substances adhering to materials such as surgical instruments.  

A unit of loudness; the loudness of a pure tone of 1000 cycles per second, 40 decibels above the listener’s threshold of hearing.  

In diabetes mellitus, rebound hyperglycemia following an episode of hypoglycemia caused by counterregulatory hormone release. Reduction of the insulin dose will help control this condition.  

Excessive drowsiness, impaired concentration, fatigue, and low-grade fevers in individuals exposed to radiation therapy, especially radiation to the head.  

Producing sleep. Any substance or medication that induces sleep.  

General sensory conduction path leading to the cortex.  

The region in the parietal lobe of the cerebral cortex in which lie the terminations of the axons of general sensory conduction pathways. This area feels and interprets the cutaneous senses and conscious proprioceptive sense.