Publications [#195305] of Nimmi Ramanujam

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1. Choe, Regine and Vishnoi, Gargi and Ramanujam, Nirmala and Ntziachristos, Vasilis and Nioka, Shoko and Chance, Britton and Yodh, Arjun G. and Rode, Martha and Forouzan, Iraj and Morgan, Mark, Feasibility of frequency domain NIR spectrometer to measure fetal cerebral blood oxygenation in-utero, Proceedings of SPIE - The International Society for Optical Engineering, vol. 3597 (1999), pp. 661 - 668, San Jose, CA, USA [12.356782]
   (last updated on 2011/09/23)

   Abstract:
   The feasibility of using a frequency domain spectrometer for measuring fetal cerebral blood oxygenation in-utero at 750 and 780 nm of modulation at 70 MHz was investigated. Clinical data was recorded during the elective Cesarean section of human subjects. The measurements were made on maternal abdomen in the post-epidural stage and on the fontanel region of neonate before and after the umbilical cord was detached. The deoxygenated and oxygenated hemoglobin concentration, blood volume and saturation were calculated based on μ_α of 2 wavelength. The post-epidural blood saturation value correlated well with the pre-cord saturation value.

   Keywords:
   Infrared spectrometers;Hemoglobin oxygen saturation;Blood;Tissue;Algorithms;Optical properties;Infrared spectroscopy;Light propagation;