{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,23]],"date-time":"2026-01-23T08:16:15Z","timestamp":1769156175867,"version":"3.49.0"},"reference-count":15,"publisher":"Journal of Neurosurgery Publishing Group (JNSPG)","issue":"5","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[1985,11]]},"abstract":"<jats:p content-type=\"fine-print\">\u2713 A comparison of intraventricular pressure (IVP) and extradural pressure (EDP) was carried out in 17 patients being investigated for normal-pressure hydrocephalus, and in six patients with acutely raised intracranial pressure following events such as head injury or intracerebral hematoma. Extradural pressure was measured using the CardioSearch monitor. There was a reasonably good correlation between EDP and IVP in the chronic stable group with pressures up to 25 mm Hg. In the acute group there was no predictable relationship between EDP and IVP, and during a 24-hour period the pressures could vary by as much as 30 mm Hg. Subdural pressure, measured with the same instruments, was compared to IVP in both acute and stable situations in eight other patients: there was a close and constant correlation between pressures in these two spaces. The authors conclude that misleading information may be obtained from EDP monitoring, and erroneous management decisions may result from dependence on such a technique. Possible explanations for this are discussed.<\/jats:p>","DOI":"10.3171\/jns.1985.63.5.0745","type":"journal-article","created":{"date-parts":[[2009,5,8]],"date-time":"2009-05-08T16:16:15Z","timestamp":1241799375000},"page":"745-749","source":"Crossref","is-referenced-by-count":35,"title":["Behavior of an extradural pressure monitor in clinical use"],"prefix":"10.3171","volume":"63","author":[{"given":"Michael P.","family":"Powell","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"H. Alan","family":"Crockard","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1754","reference":[{"key":"b1","series-title":"J Neurosurg","doi-asserted-by":"publisher","first-page":"491","DOI":"10.3171\/jns.1977.47.4.0491","article-title":"The outcome from severe head injury with early diagnosis and intensive management.","volume":"47","author":"Becker","year":"1977"},{"key":"b2","series-title":"Intracranial Pressure.","first-page":"70","article-title":"Comments to Session 2","author":"Cooper","year":"1972"},{"key":"b3","series-title":"Intracranial Pressure.","first-page":"51","article-title":"Comparison of extradural with intraventricular pressure in patients after head injury","author":"Coroneos","year":"1972"},{"key":"b4","series-title":"J Neurol Neurosurg Psychiatry","doi-asserted-by":"publisher","first-page":"736","DOI":"10.1136\/jnnp.40.8.736","article-title":"Hydrocephalus as a cause of dementia: evaluation by computerised tomography and intracranial pressure monitoring.","volume":"40","author":"Crockard","year":"1977"},{"key":"b5","series-title":"J Neurosurg","doi-asserted-by":"publisher","first-page":"123","DOI":"10.3171\/jns.1984.60.1.0123","article-title":"Assessment of Leeds device for monitoring intracranial pressure.","volume":"60","author":"Dearden","year":"1984"},{"key":"b6","series-title":"Intracranial Pressure II.","first-page":"403","article-title":"The validity of extradural measurement of the intracranial pressure","author":"Dorsch","year":"1975"},{"key":"b7","series-title":"Neurosurgery","doi-asserted-by":"publisher","first-page":"266","DOI":"10.1227\/00006123-197711000-00008","article-title":"The use of a fiberoptic intracranial pressure monitor in clinical practice.","volume":"1","author":"Levin","year":"1977"},{"key":"b8","series-title":"Med Instrum","first-page":"293","article-title":"Epidural intracranial pressure monitoring: a new system.","volume":"17","author":"Levin","year":"1983"},{"key":"b9","series-title":"J Neurosurg","doi-asserted-by":"publisher","first-page":"45","DOI":"10.3171\/jns.1983.58.1.0045","article-title":"A clinical comparison of the subdural screw pressure measurements with ventricular pressure.","volume":"58","author":"Mendelow","year":"1983"},{"key":"b10","series-title":"Dilemmas in the Management of the Neurological Patient.","first-page":"223","article-title":"Aggressive medical care of severe head injury \u2014 is it justified, ethically and economically?","author":"Miller","year":"1984"},{"key":"b11","series-title":"J Neurosurg","doi-asserted-by":"publisher","first-page":"289","DOI":"10.3171\/jns.1981.54.3.0289","article-title":"Further experience in the management of severe head injury.","volume":"54","author":"Miller","year":"1981"},{"key":"b12","series-title":"Int Anesthesiol Clin","doi-asserted-by":"publisher","first-page":"375","DOI":"10.1097\/00004311-197917020-00016","article-title":"Monitoring of intracranial pressure.","volume":"17","author":"Moss","year":"1979"},{"key":"b13","series-title":"Dilemmas in the Management of the Neurological Patient.","first-page":"207","article-title":"Normal pressure hydrocephalus \u2014 to shunt or not to shunt?","author":"Pickard","year":"1984"},{"key":"b14","series-title":"Intracranial Pressure.","first-page":"37","article-title":"Comments to Session 1","author":"Symon","year":"1972"},{"key":"b15","series-title":"J Neurosurg","doi-asserted-by":"publisher","first-page":"416","DOI":"10.3171\/jns.1973.39.3.0416","article-title":"A subarachnoid screw for monitoring intracranial pressure. Technical note.","volume":"39","author":"Vries","year":"1973"}],"container-title":["Journal of Neurosurgery"],"original-title":[],"link":[{"URL":"https:\/\/thejns.org\/view\/journals\/j-neurosurg\/63\/5\/article-p745.xml","content-type":"text\/html","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/thejns.org\/downloadpdf\/journals\/j-neurosurg\/63\/5\/article-p745.xml","content-type":"text\/html","content-version":"vor","intended-application":"syndication"},{"URL":"https:\/\/thejns.org\/downloadpdf\/journals\/j-neurosurg\/63\/5\/article-p745.xml","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2022,7,24]],"date-time":"2022-07-24T17:12:41Z","timestamp":1658682761000},"score":1,"resource":{"primary":{"URL":"https:\/\/thejns.org\/view\/journals\/j-neurosurg\/63\/5\/article-p745.xml"}},"subtitle":["Comparison of extradural with intraventricular pressure in patients with acute and chronically raised intracranial pressure"],"short-title":[],"issued":{"date-parts":[[1985,11]]},"references-count":15,"journal-issue":{"issue":"5"},"URL":"https:\/\/doi.org\/10.3171\/jns.1985.63.5.0745","relation":{},"ISSN":["0022-3085"],"issn-type":[{"value":"0022-3085","type":"print"}],"subject":[],"published":{"date-parts":[[1985,11]]}}}