| Project/Area Number |
58480308
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Cerebral neurosurgery
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| Research Institution | Osaka Medical College |
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Principal Investigator |
OHTA Tomio (1988) Osaka Medical School Professor of Neurosurgery, 脳神経外科, 教授 (80025650)
太田 冨雄 (1983-1984) 大阪医科大学, 医学部, 教授
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| Co-Investigator(Kenkyū-buntansha) |
SHIGUMA Michio Osaka Medical School, 脳神経外科, 講師 (90154195)
YOSHIKAWA Yukihiro Osaka Medical School, 脳神経外科, 講師 (90140152)
SHIMIZU Koichiro Osaka Medical School, 脳神経外科, 助教授 (80140151)
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| Project Period (FY) |
1983 – 1984
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| Project Status |
Completed (Fiscal Year 1988)
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| Budget Amount *help |
¥6,500,000 (Direct Cost: ¥6,500,000)
Fiscal Year 1984: ¥6,300,000 (Direct Cost: ¥6,300,000)
Fiscal Year 1983: ¥200,000 (Direct Cost: ¥200,000)
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| Keywords | Epidural pressure sensor / Telemetric / Epidural pressure / Intraventricular pressure / 頭蓋内圧 |
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| Research Abstract |
A new, fully implantable epidural pressure (EDP) sensor was designed for intracranial pressure montoring. This is a passive resonant circuit transducer of simple counter scale design. Telemetric measurement is done easily by a grid-dip of the external antenna coil (probe), applied on the intact scalp over the implanted EDP sensor. This EDP sensor has the following advantages: 1) There is no zero drift due to gas leak, because a leaf spring is used instead of a bellow. 2) EDP sensors of various sensitivities can be designed easily by using leaf springs with different spring constants. 3) The pressure disc and ferrite core do not tilt because of the leaf springs pair. 4) There is no complicated system for atmospheric correction because there is no vacuum space. 5) Pulse waves can be detected by sampling 50 times per second. 6) Thermal drift is negligible. 7) The method of measurement is very easy by applying the probe to the scalp, and the inconvenience to patients is very sligh. This EDP sensor is useful for monitoring intracranial pressure when dealing with patients with acute intracranial disease. Clinical experiences with using this EDP sensor have been also reported.
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