CSF shunt physics: factors influencing inshunt CSF flow
Cerebrospinal fluid (CSF) in a shunt does not have a constant flow rate. The flow fluctuates from 0.01 ml/min to 1.93 ml/min according to each patient's own daily supine rhythmic pattern. We determined and evaluated the factors influencing CSF flow in a shunt in 19 cases of hydrocephalus. Postu...
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| Veröffentlicht in: | Child's nervous system 1995-04, Vol.11 (4), p.203-206 |
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| container_title | Child's nervous system |
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| creator | KADOWAKI, C HARA, M NUMOTO, M TAKEUCHI, K SAITO, I |
| description | Cerebrospinal fluid (CSF) in a shunt does not have a constant flow rate. The flow fluctuates from 0.01 ml/min to 1.93 ml/min according to each patient's own daily supine rhythmic pattern. We determined and evaluated the factors influencing CSF flow in a shunt in 19 cases of hydrocephalus. Postural changes, such as head elevation, led to increases by over 0.04 ml/min in inshunt CSF flow, while inshunt CSF flow in the supine position was less than 0.04 ml/min. Respiratory changes, such as coughing and apnea-hyperventilation, also influenced inshunt CSF flow. Changes in intracranial pressure (ICP) corresponded to changes in inshunt CSF flow. Inshunt CSF flows were higher than average during the night, the flows being stimulated by increases in ICP especially during REM sleep. |
| doi_str_mv | 10.1007/bf00277654 |
| format | Article |
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The flow fluctuates from 0.01 ml/min to 1.93 ml/min according to each patient's own daily supine rhythmic pattern. We determined and evaluated the factors influencing CSF flow in a shunt in 19 cases of hydrocephalus. Postural changes, such as head elevation, led to increases by over 0.04 ml/min in inshunt CSF flow, while inshunt CSF flow in the supine position was less than 0.04 ml/min. Respiratory changes, such as coughing and apnea-hyperventilation, also influenced inshunt CSF flow. Changes in intracranial pressure (ICP) corresponded to changes in inshunt CSF flow. 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Spinal cord</subject><subject>Female</subject><subject>Humans</subject><subject>Hydrocephalus - cerebrospinal fluid</subject><subject>Hydrocephalus - surgery</subject><subject>Intracranial Pressure - physiology</subject><subject>Male</subject><subject>Medical sciences</subject><subject>Middle Aged</subject><subject>Nervous system (semeiology, syndromes)</subject><subject>Neurology</subject><subject>Physical Phenomena</subject><subject>Physics</subject><subject>Posture - physiology</subject><subject>Pulmonary Ventilation - physiology</subject><subject>Reference Values</subject><subject>Rheology - instrumentation</subject><issn>0256-7040</issn><issn>1433-0350</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1995</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNo90M9LwzAUB_AgypzTi3ehB_EgVF9-J950OBUGHtRzSdNEK107kxbZf2_G6k7vwfvwhfdF6BzDDQaQt6UHIFIKzg7QFDNKc6AcDtEUCBe5BAbH6CTGbwDMFdETNJGCYKZgiuT8bZHFr6Hts_XXJtY23mXe2L4LMatb3wyutXX7mfYd2nLfdL-n6MibJrqzcc7Qx-Lxff6cL1-fXub3y9wyrPqcGa80Zpo544iuAMBpI7gCJTDRwmJKuXK8sh4M2BJTIdJHFkhlS_Ca0xm62uWuQ_czuNgXqzpa1zSmdd0QCykZBq10gtc7aEMXY3C-WId6ZcKmwFBsWyoeFv8tJXwxpg7lylV7OtaS7pfj3URrGh9MaiHuGU1Ga0b_AL1HbDU</recordid><startdate>19950401</startdate><enddate>19950401</enddate><creator>KADOWAKI, C</creator><creator>HARA, M</creator><creator>NUMOTO, M</creator><creator>TAKEUCHI, K</creator><creator>SAITO, I</creator><general>Springer</general><scope>IQODW</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope></search><sort><creationdate>19950401</creationdate><title>CSF shunt physics: factors influencing inshunt CSF flow</title><author>KADOWAKI, C ; HARA, M ; NUMOTO, M ; TAKEUCHI, K ; SAITO, I</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c418t-4af891494eae29d000e9a6580861296c13358e5dcf0a0cb1366100c02dcb0f953</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1995</creationdate><topic>Adolescent</topic><topic>Adult</topic><topic>Aged</topic><topic>Biological and medical sciences</topic><topic>Cerebrospinal Fluid Pressure - physiology</topic><topic>Cerebrospinal Fluid Shunts - instrumentation</topic><topic>Cerebrospinal fluid. Meninges. Spinal cord</topic><topic>Female</topic><topic>Humans</topic><topic>Hydrocephalus - cerebrospinal fluid</topic><topic>Hydrocephalus - surgery</topic><topic>Intracranial Pressure - physiology</topic><topic>Male</topic><topic>Medical sciences</topic><topic>Middle Aged</topic><topic>Nervous system (semeiology, syndromes)</topic><topic>Neurology</topic><topic>Physical Phenomena</topic><topic>Physics</topic><topic>Posture - physiology</topic><topic>Pulmonary Ventilation - physiology</topic><topic>Reference Values</topic><topic>Rheology - instrumentation</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>KADOWAKI, C</creatorcontrib><creatorcontrib>HARA, M</creatorcontrib><creatorcontrib>NUMOTO, M</creatorcontrib><creatorcontrib>TAKEUCHI, K</creatorcontrib><creatorcontrib>SAITO, I</creatorcontrib><collection>Pascal-Francis</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><jtitle>Child's nervous system</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>KADOWAKI, C</au><au>HARA, M</au><au>NUMOTO, M</au><au>TAKEUCHI, K</au><au>SAITO, I</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>CSF shunt physics: factors influencing inshunt CSF flow</atitle><jtitle>Child's nervous system</jtitle><addtitle>Childs Nerv Syst</addtitle><date>1995-04-01</date><risdate>1995</risdate><volume>11</volume><issue>4</issue><spage>203</spage><epage>206</epage><pages>203-206</pages><issn>0256-7040</issn><eissn>1433-0350</eissn><abstract>Cerebrospinal fluid (CSF) in a shunt does not have a constant flow rate. The flow fluctuates from 0.01 ml/min to 1.93 ml/min according to each patient's own daily supine rhythmic pattern. We determined and evaluated the factors influencing CSF flow in a shunt in 19 cases of hydrocephalus. Postural changes, such as head elevation, led to increases by over 0.04 ml/min in inshunt CSF flow, while inshunt CSF flow in the supine position was less than 0.04 ml/min. Respiratory changes, such as coughing and apnea-hyperventilation, also influenced inshunt CSF flow. Changes in intracranial pressure (ICP) corresponded to changes in inshunt CSF flow. Inshunt CSF flows were higher than average during the night, the flows being stimulated by increases in ICP especially during REM sleep.</abstract><cop>Berlin</cop><pub>Springer</pub><pmid>7621480</pmid><doi>10.1007/bf00277654</doi><tpages>4</tpages></addata></record> |
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| ispartof | Child's nervous system, 1995-04, Vol.11 (4), p.203-206 |
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| subjects | Adolescent Adult Aged Biological and medical sciences Cerebrospinal Fluid Pressure - physiology Cerebrospinal Fluid Shunts - instrumentation Cerebrospinal fluid. Meninges. Spinal cord Female Humans Hydrocephalus - cerebrospinal fluid Hydrocephalus - surgery Intracranial Pressure - physiology Male Medical sciences Middle Aged Nervous system (semeiology, syndromes) Neurology Physical Phenomena Physics Posture - physiology Pulmonary Ventilation - physiology Reference Values Rheology - instrumentation |
| title | CSF shunt physics: factors influencing inshunt CSF flow |
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