Abstract
The objective was to evaluate the qualification of the new telemetric intracranial pressure (ICP) measurement (t-ICP) device Raumedic® NEUROVENT P-Tel and S-Tel. The proof of concept was examined in a pilot animal study measuring intraperitoneal pressure with a telemetric and a conventional ICP measurement probe at five rates for 1 h each. Moderate external pressure load allowed measuring values between 0 and 40 mmHg. To estimate long-term performance 18 t-ICP devices were implanted subdurally or intraparenchymally into minipigs. Reference measurements were performed regularly using conventional ICP probes. From the short-term as well as from the long-term perspective t-ICP proved to have excellent dynamic ICP signal components perception (e.g. pulse amplitude). Some zero drift of static ICP was found, ranging between 5 and 8 mmHg. While all telemetric, intraparenchymal probes kept their functionality throughout the follow-up, 33% of the subdurals failed for reasons detailed in another paper. Raumedic’s NEUROVENT® P-Tel/S-Tel proved to provide reliable data over periods of up to 18 months. Minor zero drift can be well tolerated as the dynamic ICP signal is measured with excellent stability. Clinicians should focus more on such ICP dynamic signal information than on static ICP when using the device over longer follow-up periods.
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References
Cosman ER, Zervas NT, Chapman PH, Cosman BJ, Arnold MA (1979) A telemetric pressure sensor for ventricular shunt systems. Surg Neurol 11:287–294
de Jong DA, Berfelo MW, de Lange SA, Maas AI (1979) Epidural pressure monitoring with the so-called Rotterdam transducer. Further in vivo results. Acta Neurochir (Wien) 45:301–309
Heppner F, Lanner G, Rodler H (1976) Telemetry of intracranial pressure. Acta Neurochir (Wien) 33:37–43
Zervas NT, Cosman ER, Cosman BJ (1977) A pressure-balanced radio-telemetry system for the measurement of intracranial pressure. A preliminary design report. J Neurosurg 47:899–911
Rylander HG, Taylor HL, Wissinger JP, Story JL (1976) Chronic measurement of epidural pressure with an induction-powered oscillator transducer. J Neurosurg 44:465–478
Richard KE, Block FR, Weiser RR (1999) First clinical results with a telemetric shunt-integrated ICP-sensor. Neurol Res 21:117–120
Wilson MH, Milledge JMD (2008) Direct measurement of intracranial pressure at high altitude and correlation of ventricular size with acute mountain sickness: Brian Cummins’ results from the 1985 Kishtwar expedition. Neurosurgery 63:970–975
Eymann R, Kiefer M (2010) Glue instead of stitches: a minor change of the operative technique with a serious impact on the shunt infection rate. Acta Neurochir Suppl 106:87–89
Miyake H, Ohta T, Kajimoto Y, Matsukawa M (1997) A new ventriculoperitoneal shunt with a telemetric intracranial pressure sensor: clinical experience in 94 patients with hydrocephalus. Neurosurgery 40:931–935
Osaka K, Ohta T (1980) Limits of various methods for evaluation of shunt function and development of new intracranial pressure meter incorporated in the shunt system. No Shinkei Geka 8:811–817
Schmitt M, Eymann R, Antes S, Kiefer M (2011) Subdural or intraparenchymal placement of long-term telemetric ICP measurement devices. Acta Neurochir Suppl: Hydrocephalus, 113. Aygok, Gunes A, Rekate, Harold L. (Eds.); 2012, XII, ISBN 978-3-7091-0922-9
Financial Disclosure
This study has been performed with support of the German Ministry for Research and Education, which was granted to a consortium of the Saarland University (M. Kiefer, S. Antes, M. Schmitt, R. Eymann), the RWTH Aachen (Steffen Leonhardt), and Raumedic® AG (Helmbrechts, Germany) (BMBF-Grant ID-No.: 16SV3745). These authors have received no further financial benefits from this research work. B. Orakcioglu received some financial support from Raumedic AG for performing the study. No aspects of these studies (design, data acquisition and analysis or content of this manuscript) were influenced by any of the sponsors or the industrial partner of the consortium.
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We declare that we have no conflict of interest.
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Kiefer, M. et al. (2012). Telemetric ICP Measurement with the First CE-Approved Device: Data from Animal Experiments and Initial Clinical Experiences. In: Schuhmann, M., Czosnyka, M. (eds) Intracranial Pressure and Brain Monitoring XIV. Acta Neurochirurgica Supplementum, vol 114. Springer, Vienna. https://doi.org/10.1007/978-3-7091-0956-4_20
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DOI: https://doi.org/10.1007/978-3-7091-0956-4_20
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