NCLEX-PN

Normal ICP ranges from 5 to 15 mmHg. Cerebral perfusion pressure, which ensures adequate brain perfusion, is calculated as the mean arterial pressure minus ICP. The normal range for cerebral perfusion pressure is 60 to 100 mmHg.

Brain herniation can occur when ICP exceeds the skull's capacity, leading to central transtentorial, transtentorial, or cingulate herniation. Signs of increased ICP include a widened pulse pressure, decreased level of consciousness, headache, vomiting, seizures, abnormal posturing, dilated pupils, sensory and motor deficits, visual disturbances, Cheyne-Stokes respirations , and Cushing's reflex (late sign).

Monitoring methods include computed tomography (CT) scans for diagnosis and intraventricular catheters (ventriculostomy), subarachnoid bolts, and epidural bolts for direct ICP measurement and cerebrospinal fluid drainage. Treatment depends on the cause and severity and may involve medications like osmotic diuretics, corticosteroids, and anticonvulsants. In some cases, a barbiturate coma,

cardiopulmonary resuscitation, and mechanical ventilation may be necessary. E. Understanding and Administering Diagnostic Tests

Understanding diagnostic tests and their execution is crucial in ensuring accurate client assessment and effective intervention. Here are the key aspects to consider: ●​ Specimen Collection and Precautions : Grasp the principles of proper specimen collection. Morning collections before food or fluids are ideal. When fasting is necessary, it's typically for 8 to 12 hours prior to the test. Employ standard precautions and aseptic techniques to ensure both your safety and your clients' protection from infection. ●​ Specimen Labeling and Laboratory Requisitions : Master the art of labeling specimens with vital details like client's name, date, collection time, and specimen type. Fill out the laboratory requisition slip comprehensively, including essential information such as client details, tests requested, and potential interfering factors. Specimen labeling must be completed at the bedside at the time of collection. ●​ Interpreting Test Results and Critical Values : Gain proficiency in interpreting test results. Values within reference ranges are normal, while those falling outside are abnormal. Critical values, significantly deviating from the reference range, necessitate immediate action to safeguard the client. These values must be reported promptly to the RN and the physician.

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