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Baumgardner JE, Mellon EA, Tailor DR, et al. Mechanical ventilator for delivery of ¹⁷O₂ in brief pulses. Open Biomed Eng J. 2008;2:57-63doi: 10.2174/1874120700802010057.
Baumgardner, J. E., Mellon, E. A., Tailor, D. R., Mallikarjunarao, K., Borthakur, A., & Reddy, R. (2008). Mechanical ventilator for delivery of ¹⁷O₂ in brief pulses. The open biomedical engineering journal, 257-63. https://doi.org/10.2174/1874120700802010057
Baumgardner, J E, et al. "Mechanical ventilator for delivery of ¹⁷O₂ in brief pulses." The open biomedical engineering journal vol. 2 (2008): 57-63. doi: https://doi.org/10.2174/1874120700802010057
Baumgardner JE, Mellon EA, Tailor DR, Mallikarjunarao K, Borthakur A, Reddy R. Mechanical ventilator for delivery of ¹⁷O₂ in brief pulses. Open Biomed Eng J. 2008 Sep 24;2:57-63. doi: 10.2174/1874120700802010057. PMID: 19662118; PMCID: PMC2701066.
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Open Biomed Eng J. 2008 Sep 24;2:57-63. doi: 10.2174/1874120700802010057.

Mechanical ventilator for delivery of ¹⁷O₂ in brief pulses.

The open biomedical engineering journal

J E Baumgardner, E A Mellon, D R Tailor, K Mallikarjunarao, A Borthakur, R Reddy

Affiliations

  1. Oscillogy LLC, Folsom, PA 19033, USA.

PMID: 19662118 PMCID: PMC2701066 DOI: 10.2174/1874120700802010057

Abstract

The ¹⁷O nucleus has been used recently by several groups for magnetic resonance (MR) imaging of cerebral metabolism. Inhalational delivery of ¹⁷O(2) in very brief pulses could, in theory, have significant advantages for determination of the cerebral metabolic rate for oxygen (CMRO₂) with MR imaging. Mechanical ventilators, however, are not typically capable of creating step changes in gas concentration at the airway. We designed a ventilator for large animal and human studies that provides mechanical ventilation to a subject inside an MR scanner through 25 feet of small-bore connecting tubing, and tested its capabilities using helium as a surrogate for ¹⁷O₂. After switching the source gas from oxygen to helium, the 0-90% response time for helium concentration changes at the airway was 2.4 seconds. The capability for creating rapid step changes in gas concentration at the airway in large animal and human studies should facilitate the experimental testing of the delivery ¹⁷O₂ in brief pulses, and its potential use in imaging CMRO₂.

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