Simultaneous measurement of cerebral hemoglobin oxygen saturation and blood volume in asphyxiated neonates by near-infrared time-resolved spectroscopy

2015 ◽  
Vol 37 (10) ◽  
pp. 925-932 ◽  
Author(s):  
Shinji Nakamura ◽  
Kosuke Koyano ◽  
Wataru Jinnai ◽  
Satoshi Hamano ◽  
Saneyuki Yasuda ◽  
...  
Keyword(s):  
Oxygen Saturation ◽  
Blood Volume ◽  
Simultaneous Measurement ◽  
Near Infrared ◽  
Time Resolved ◽  
Hemoglobin Oxygen Saturation ◽  
Time Resolved Spectroscopy

scholarly journals Cerebral blood volume increment after resuscitation measured by near-infrared time-resolved spectroscopy can estimate degree of hypoxic–ischemic insult in newborn piglets

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Tsutomu Mitsuie ◽  
Shinji Nakamura ◽  
Yinmon Htun ◽  
Yasuhiro Nakao ◽  
Makoto Arioka ◽  
...  
Keyword(s):  
Blood Volume ◽  
Near Infrared ◽  
Cerebral Blood Volume ◽  
Brain Injuries ◽  
Time Resolved ◽  
Time Resolved Spectroscopy ◽  
The Difference ◽  
The Relationship ◽  
Inspired Oxygen ◽  
Ischemic Encephalopathy

AbstractNeonatal hypoxic–ischemic encephalopathy is a notable cause of neonatal death and developmental disabilities. To achieve better outcomes, it is important in treatment strategy selection to categorize the degree of hypoxia ischemia and evaluate dose response. In an asphyxia piglet model with histopathological brain injuries that we previously developed, animals survived 5 days after insult and showed changes in cerebral blood volume (CBV) that reflected the severity of injuries. However, little is known about the relationship between changes in CBV during and after insult. In this study, an HI event was induced by varying the amount and timing of inspired oxygen in 20 anesthetized piglets. CBV was measured using near-infrared time-resolved spectroscopy before, during, and 6 h after insult. Change in CBV was calculated as the difference between the peak CBV value during insult and the value at the end of insult. The decrease in CBV during insult was found to correlate with the increase in CBV within 6 h after insult. Heart rate exhibited a similar tendency to CBV, but blood pressure did not. Because the decrement in CBV was larger in severe HI, the CBV increment immediately after insult is considered useful for assessing degree of HI insult.

scholarly journals Measurement of the Absolute Value of Cerebral Blood Volume and Optical Properties in Term Neonates Immediately after Birth Using Near-Infrared Time-Resolved Spectroscopy: A Preliminary Observation Study

2019 ◽  
Vol 9 (10) ◽  
pp. 2172 ◽  
Author(s):  
Aya Morimoto ◽  
Shinji Nakamura ◽  
Masashiro Sugino ◽  
Kosuke Koyano ◽  
Yinmon Htun ◽  
...  
Keyword(s):  
Optical Properties ◽  
Blood Volume ◽  
Near Infrared ◽  
Cerebral Blood Volume ◽  
Transition Period ◽  
Observation Study ◽  
Time Resolved ◽  
Term Neonates ◽  
Time Resolved Spectroscopy ◽  
The Absolute

The aim of this study was to use near-infrared time-resolved spectroscopy (TRS) to determine the absolute values of cerebral blood volume (CBV) and cerebral hemoglobin oxygen saturation (ScO2) during the immediate transition period in term neonates and the changes in optical properties such as the differential pathlength factor (DPF) and reduced scattering coefficient (μs’). CBV and ScO2 were measured using TRS during the first 15 min after birth by vaginal delivery in term neonates who did not need resuscitation. Within 2–3 min after birth, CBV showed various changes such as increases or decreases, followed by a gradual decrease until 15 min and then stability (mean (SD) mL/100 g brain: 2 min, 3.09 (0.74); 3 min, 3.01 (0.77); 5 min, 2.69 (0.77); 10 min, 2.40 (0.61), 15 min, 2.08 (0.47)). ScO2 showed a gradual increase, then kept increasing or became a stable reading. The DPF and μs’ values (mean (SD) at 762, 800, and 836 nm) were stable during the first 15 min after birth (DPF: 4.47 (0.38), 4.41 (0.32), and 4.06 (0.28)/cm; μs’: 6.54 (0.67), 5.82 (0.84), and 5.43 (0.95)/cm). Accordingly, we proved that TRS can stably measure cerebral hemodynamics, despite the dramatic physiological changes occurring at this time in the labor room.

scholarly journals Brown adipose tissue density measured by near-infrared time-resolved spectroscopy in Japanese, across a wide age range

2018 ◽  
Vol 23 (06) ◽  
pp. 1 ◽  
Author(s):  
Sayuri Fuse ◽  
Shinsuke Nirengi ◽  
Shiho Amagasa ◽  
Toshiyuki Homma ◽  
Ryotaro Kime ◽  
...  
Keyword(s):  
Adipose Tissue ◽  
Brown Adipose Tissue ◽  
Near Infrared ◽  
Time Resolved ◽  
Time Resolved Spectroscopy ◽  
Tissue Density ◽  
Brown Adipose ◽  
Age Range

Optical Analysis of the Cirrhotic Liver by Near-Infrared Time-Resolved Spectroscopy

Surgery Today ◽  
2004 ◽  
Vol 34 (5) ◽  
pp. 424-428 ◽  
Author(s):  
Toshiyuki Kitai ◽  
Toshihiro Nishio ◽  
Mitsuharu Miwa ◽  
Yoshio Yamaoka
Keyword(s):  
Near Infrared ◽  
Cirrhotic Liver ◽  
Optical Analysis ◽  
Time Resolved ◽  
Time Resolved Spectroscopy

Near-infrared time-resolved spectroscopy of the cataclysmic variable YY Draconis

1991 ◽  
Vol 370 ◽  
pp. 370 ◽  
Author(s):  
Mario Mateo ◽  
Paula Szkody ◽  
Peter Garnavich
Keyword(s):  
Near Infrared ◽  
Cataclysmic Variable ◽  
Time Resolved ◽  
Time Resolved Spectroscopy
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