| Автор | Julia A O'Hara |
| Автор | Nadeem Khan |
| Автор | Huagang Hou |
| Автор | Carmen M Wilmot |
| Автор | Eugene Demidenko |
| Автор | Jeff F Dunn |
| Автор | Harold M Swartz |
| Дата выпуска | 2004-12-01 |
| dc.description | EPR oximetry is a promising, relatively non-invasive method for monitoring the partial pressure of oxygen in tissue (PtO<sub>2</sub>) that has proved useful in following changes under various physiologic and pathophysiologic conditions. Optimal utilization of the method will be facilitated by systematic comparisons with other available methods. Here we report on the absolute values of rat brain PtO<sub>2</sub> using EPR and the more widely used Eppendorf polarographic microelectrode system in the same brain. EPR used an L-band (1.2 GHz) spectrometer and implanted lithium phthalocyanine (LiPc) as the oxygen-sensitive paramagnetic material. Eppendorf measurements were made by a needle probe moved vertically through the cortex at 0.5 mm intervals in three tracks including one adjacent to the location of the LiPc. Several conclusions were drawn, including, (1) the average PtO<sub>2</sub> measured by the two methods was similar but EPR reported a significantly higher average PtO<sub>2</sub>, (2) there was poor correlation between the values in the same animal on the same side of the brain, (3) the Eppendorf reported a larger range of values and (4) the heterogeneity of oxygen levels in the brain and the areas sampled by the two methods provide an adequate explanation for the observed differences. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Копирайт | 2004 IOP Publishing Ltd |
| Название | Comparison of EPR oximetry and Eppendorf polarographic electrode assessments of rat brain PtO<sub>2</sub> |
| Тип | paper |
| DOI | 10.1088/0967-3334/25/6/007 |
| Electronic ISSN | 1361-6579 |
| Print ISSN | 0967-3334 |
| Журнал | Physiological Measurement |
| Том | 25 |
| Первая страница | 1413 |
| Последняя страница | 1423 |
| Аффилиация | Julia A O'Hara; EPR Center for the Study of Viable Systems, Dartmouth Medical School, Hanover, NH 03755, USA |
| Аффилиация | Nadeem Khan; EPR Center for the Study of Viable Systems, Dartmouth Medical School, Hanover, NH 03755, USA |
| Аффилиация | Huagang Hou; EPR Center for the Study of Viable Systems, Dartmouth Medical School, Hanover, NH 03755, USA |
| Аффилиация | Carmen M Wilmot; EPR Center for the Study of Viable Systems, Dartmouth Medical School, Hanover, NH 03755, USA |
| Аффилиация | Eugene Demidenko; EPR Center for the Study of Viable Systems, Dartmouth Medical School, Hanover, NH 03755, USA |
| Аффилиация | Jeff F Dunn; EPR Center for the Study of Viable Systems, Dartmouth Medical School, Hanover, NH 03755, USA |
| Аффилиация | Harold M Swartz; EPR Center for the Study of Viable Systems, Dartmouth Medical School, Hanover, NH 03755, USA |
| Выпуск | 6 |
