Investigation of weakness

Investigation must be guided by as precise an anatomical clinical diagnosis as is feasible given the condition of the patient. Radiological investigations

Plain radiography of the skull and spine is particularly valuable in trauma victims. Such radiographs may also be appropriate for the investigation of systemic disease such as disseminated malignancy. Their use as detectors of structural change within the central nervous system has diminished greatly since the advent of CT and magnetic resonance imaging (MRI). Radionuclide investigations have also been superseded by these techniques. If a central nervous system lesion is suspected on clinical assessment, a CT scan of the brain before and after intravenous contrast injection should be obtained. CT scanning of the spine may be useful in cases of trauma, particularly when plain radiographs are inadequate. Myelography has largely been replaced by MRI. Cerebral angiography may be required in cases of subarachnoid or other intracranial hemorrhage to delineate intracerebral aneurysms or angiomata.

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Sleep Apnea

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