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Gunnarsson, Thorsteinn
Publications (6 of 6) Show all publications
Hillman, J., Sturnegk, P., Yonas, H., Heron, J., Sandborg, M., Gunnarsson, T. & Mellergård, P. E. (2005). Bedside monitoring of CBF with xenon-CT and a mobile scanner: A novel method in neurointensive care. British Journal of Neurosurgery, 19(5), 395-401
Open this publication in new window or tab >>Bedside monitoring of CBF with xenon-CT and a mobile scanner: A novel method in neurointensive care
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2005 (English)In: British Journal of Neurosurgery, ISSN 0268-8697, E-ISSN 1360-046X, Vol. 19, no 5, p. 395-401Article in journal (Refereed) Published
Abstract [en]

Combining previously independently established techniques our objective was to develop and evaluate a method for bedside qualitative assessment of cerebral blood flow in neurointensive care (NICU) patients. The CT-protocol was optimized using phantoms and comparing a mobile CT-scanner (Tomoscan-M, Philips) with two stationary CT scanners. Thirty-two per cent xenon was delivered with standard equipment (Enhancer 3000). Mean cortical flow in volunteers was 48 ml/min/100 g, with the mean vascular territorial flow varying between 45 and 66 ml/min/100 g. The potential clinical usefulness was illustrated in three patients with vasospasm following subarachnoid haemorrhage. Our conclusion is that quantitative bedside measurements of CBF can be repeatedly performed in an easy and safe way in a standard NICU-setting, using xenon-inhalation and a mobile CT-scanner. The method is useful for the decision-making, and is a good example of how the quality of multi-modality monitoring in the NICU can be developed and further diversified. © The Neurosurgical Foundation.

National Category
Medical and Health Sciences
Identifiers
urn:nbn:se:liu:diva-30213 (URN)10.1080/02688690500389898 (DOI)15708 (Local ID)15708 (Archive number)15708 (OAI)
Available from: 2009-10-09 Created: 2009-10-09 Last updated: 2017-12-13
Gunnarsson, T., Olafsson, E., Sighvatsson, V. & Hannesson, B. (2002). Surgical treatment of patients with low-grade astrocytomas and medically intractable seizures. Acta Neurologica Scandinavica, 105(4), 289-292
Open this publication in new window or tab >>Surgical treatment of patients with low-grade astrocytomas and medically intractable seizures
2002 (English)In: Acta Neurologica Scandinavica, ISSN 0001-6314, E-ISSN 1600-0404, Vol. 105, no 4, p. 289-292Article in journal (Refereed) Published
Abstract [en]

Objective - Low-grade astrocytomas can present with seizures that respond poorly to antiseizure medications, with a consequent reduction in the quality of life, because of both seizures and the medication's side-effects. We report our experience with operative treatment of such patients. Subjects and methods - Five patients (two children and three adults) with supratentorial low-grade astrocytomas associated with severe seizures were operated on. We followed the effects of the operation on post-operative neurological deficit, seizure frequency and the quality of life. Results - No serious neurological complications followed the operations. The patients were followed for a median period of 12 months (6-46). Post-operatively, three of the patients became seizure-free, one experiences only auras, and one had a great reduction in seizure frequency and severity. All patients reported great improvement in their quality of life. Conclusion - Resections of low-grade astrocytomas in patients with medically intractable seizures are safe procedures that effectively control seizures in the majority of patients, resulting in significant improvement in the patients' quality of life.

Keywords
Low-grade astrocytoma, Quality of life, Seizures, Surgical treatment
National Category
Medical and Health Sciences
Identifiers
urn:nbn:se:liu:diva-47032 (URN)10.1034/j.1600-0404.2002.0o138.x (DOI)
Available from: 2009-10-11 Created: 2009-10-11 Last updated: 2017-12-13
Theodorsson, A., Gunnarsson, T., Karlsson, P. & Hillman, J. (2001). Mobile CT Scanner in the Neurosurgery Intensive Care Unit (NICU): Improving the Bedside Scanning Procedure. In: Peter Reilly; Glenn McCulloch (Ed.), Proceedings 12th World Congress of Neurosurgery :: Sydney, Australia September 16 - 20, 2001 World Federation of Neurosurgical SocietiesBook of Proceedings 12th World Congress of Neurosurgery (pp. 400-403). Linköping: Linköpings universitet
Open this publication in new window or tab >>Mobile CT Scanner in the Neurosurgery Intensive Care Unit (NICU): Improving the Bedside Scanning Procedure
2001 (English)In: Proceedings 12th World Congress of Neurosurgery :: Sydney, Australia September 16 - 20, 2001 World Federation of Neurosurgical SocietiesBook of Proceedings 12th World Congress of Neurosurgery / [ed] Peter Reilly; Glenn McCulloch, Linköping: Linköpings universitet , 2001, p. 400-403Chapter in book (Other academic)
Place, publisher, year, edition, pages
Linköping: Linköpings universitet, 2001
National Category
Medical and Health Sciences
Identifiers
urn:nbn:se:liu:diva-28102 (URN)12869 (Local ID)12869 (Archive number)12869 (OAI)
Available from: 2009-10-08 Created: 2009-10-08 Last updated: 2013-12-11Bibliographically approved
Bak, J. & Gunnarsson, T. (2001). Stereotactic brain biopsies guided by intraoperative cytological diagnosis. Modern Pathology, 14(1)
Open this publication in new window or tab >>Stereotactic brain biopsies guided by intraoperative cytological diagnosis
2001 (English)In: Modern Pathology, ISSN 0893-3952, E-ISSN 1530-0285, Vol. 14, no 1, p. 1214-Conference paper, Published paper (Other academic)
National Category
Medical and Health Sciences
Identifiers
urn:nbn:se:liu:diva-49353 (URN)
Available from: 2009-10-11 Created: 2009-10-11 Last updated: 2017-12-12
Gunnarsson, T. & Hillman, J. (2000). Clinical Usefulness of Bedside Intracranial Morphological Monitoring: Mobile Computerized Tomography in the Neurosurgery Intensive Care Unit.. Neurosurgical Focus, 9
Open this publication in new window or tab >>Clinical Usefulness of Bedside Intracranial Morphological Monitoring: Mobile Computerized Tomography in the Neurosurgery Intensive Care Unit.
2000 (English)In: Neurosurgical Focus, ISSN 1092-0684, Vol. 9Article in journal (Refereed) Published
National Category
Medical and Health Sciences
Identifiers
urn:nbn:se:liu:diva-27792 (URN)12539 (Local ID)12539 (Archive number)12539 (OAI)
Available from: 2009-10-08 Created: 2009-10-08 Last updated: 2011-01-14
Gunnarsson, T., Theodorsson, A., Karlsson, P., Fridriksson, S., Boström, S., Persliden, J., . . . Hillman, J. (2000). Mobile computerized tomography scanning in the neurosurgery intensive care unit: increase in patient safety and reduction of staff workload. Journal of Neurosurgery, 93(3), 432-436
Open this publication in new window or tab >>Mobile computerized tomography scanning in the neurosurgery intensive care unit: increase in patient safety and reduction of staff workload
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2000 (English)In: Journal of Neurosurgery, ISSN 0022-3085, E-ISSN 1933-0693, Vol. 93, no 3, p. 432-436Article in journal (Refereed) Published
Abstract [en]

Object. Transportation of unstable neurosurgical patients involves risks that may lead to further deterioration and secondary brain injury from perturbations in physiological parameters. Mobile computerized tomography (CT) head scanning in the neurosurgery intensive care (NICU) is a new technique that minimizes the need to transport unstable patients. The authors have been using this device since June 1997 and have developed their own method of scanning such patients.

Methods. The scanning procedure and radiation safety measures are described. The complications that occurred in 89 patients during transportation and conventional head CT scanning at the Department of Radiology were studied prospectively. These complications were compared with the ones that occurred during mobile CT scanning in 50 patients in the NICU. The duration of the procedures was recorded, and an estimation of the staff workload was made. Two patient groups, defined as high- and medium-risk cases, were studied. Medical and/or technical complications occurred during conventional CT scanning in 25% and 20% of the patients in the high- and medium-risk groups, respectively. During mobile CT scanning complications occurred in 4.3% of the high-risk group and 0% of the medium-risk group. Mobile CT scanning also took significantly less time, and the estimated personnel cost was reduced.

Conclusions. Mobile CT scanning in the NICU is safe. It minimizes the risk of physiological deterioration and technical mishaps linked to intrahospital transport, which may aggravate secondary brain injury. The time that patients have to remain outside the controlled environment of the NICU is minimized, and the staff's workload is decreased.

Keywords
mobile computerized tomography scanning, neurosurgery intensive care unit, transport time
National Category
Medical and Health Sciences
Identifiers
urn:nbn:se:liu:diva-27100 (URN)10.3171/jns.2000.93.3.0432 (DOI)11747 (Local ID)11747 (Archive number)11747 (OAI)
Available from: 2009-10-08 Created: 2009-10-08 Last updated: 2017-12-13Bibliographically approved
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