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The purpose of this study is to discover a mathematic equation to express the intracranial pressure-volume (P-V) curve and a single indicator to reflect the status of the curve.
Monitoring of intracranial pressure (ICP) has been used in the management of patients with increased ICP, or in whom increased ICP was suspected. ICP depends on the relative constancy of total volume inside the skull, comprising cerebrospinal fluid (CSF), blood, and brain tissue. The changes of CSF volume affect the ventricular fluid pressure and defined it as volume pressure response (VPR). The shape or curve of the intracranial volume-pressure (V-P) relationship is well known in daily neurosurgical practice. If the P-V curve can be expressed by mathematic manner, then there should be an indicator to reflect the status of the curve. This study is conducted in order to understand the difference of each P-V curve in patients with increased intracranial pressure. The individual VPR values have been tested with three mathematical models (linear, parabolic and exponential regression equation).
Observational Model: Case-Only, Time Perspective: Prospective
drainage of cerebrospinal fluid (CSF)
Department of Neurosurgery,Chang Gung Memorial Hospital
Chang Gung Memorial Hospital
Published on BioPortfolio: 2014-08-27T03:13:34-0400
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Discharge of cerebrospinal fluid through a hole through the skull bone most commonly draining from the nose (CEREBROSPINAL FLUID RHINORRHEA) or the ear (CEREBROSPINAL FLUID OTORRHEA).
Proteins in the cerebrospinal fluid, normally albumin and globulin present in the ratio of 8 to 1. Increases in protein levels are of diagnostic value in neurological diseases. (Brain and Bannister's Clinical Neurology, 7th ed, p221)
Excessive accumulation of cerebrospinal fluid within the cranium which may be associated with dilation of cerebral ventricles, INTRACRANIAL HYPERTENSION; HEADACHE; lethargy; URINARY INCONTINENCE; and ATAXIA (and in infants macrocephaly). This condition may be caused by obstruction of cerebrospinal fluid pathways due to neurologic abnormalities, INTRACRANIAL HEMORRHAGES; CENTRAL NERVOUS SYSTEM INFECTIONS; BRAIN NEOPLASMS; CRANIOCEREBRAL TRAUMA; and other conditions. Impaired resorption of cerebrospinal fluid from the arachnoid villi results in a communicating form of hydrocephalus. Hydrocephalus ex-vacuo refers to ventricular dilation that occurs as a result of brain substance loss from CEREBRAL INFARCTION and other conditions.
Tubes inserted to create communication between a cerebral ventricle and the internal jugular vein. Their emplacement permits draining of cerebrospinal fluid for relief of hydrocephalus or other condition leading to fluid accumulation in the ventricles.
A watery fluid that is continuously produced in the CHOROID PLEXUS and circulates around the surface of the BRAIN; SPINAL CORD; and in the CEREBRAL VENTRICLES.
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Neurology - Central Nervous System (CNS)
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