Abstract 16044: Measurements of Tissue Oxygen and Hemoglobin on A Near Infra-red Spectroscopy in Emergency Patients With Poor General Conditions
Introduction: In patients with poor general conditions, the conventional pulse oximetry is sometimes unable to determine the oxygen saturation because of peripheral arteriole constriction. The near infra-red spectroscopy (NIRS) can measure absolute concentration of oxygenated, deoxygenated, and total tissue hemoglobin. Purpose: This study aimed to investigate the potential of a novel minimized NIRS system in terms of measurements of tissue oxygen and hemoglobin.
Methods: We enrolled 22 normal controls and 83 emergency patients who came to the emergency department with poor general conditions. The tissue oxygen saturation (StO2) and tissue hemoglobin index (T-HbI) on second finger pulp (SFP), thenar eminence (TE), and sternocleid muscle (SM) were measured in both groups.
Results: (1) In all subjects including patients with cardio-pulmonary arrest, both the StO2 and T-Hbl values were obtained stably. (2) In the emergency patients, the StO2 value on SFP was lower than those on TE and SM (53% [49-56] vs. 57% [55-60] and 58% [53-62], median [inter-quartile range], p<0.01), whereas those in the normal controls were not different. The StO2 value on SFP was lower in the emergency patients than that in normal controls (60% [58-61], p<0.01). (3) In the emergency patients, the T-Hbl value on SBP was also lower than those on TE and SM (0.13 mM [0.11-0.15] vs. 0.25 [0.22-0.29] and 0.23 [0.18-0.29], p<0.01). The T-HbI value on SFP was also lower in the emergency patients than that in normal controls (0.18 mM [0.17-0.21], p<0.01).
Conclusion: NIRS detected peripheral circulatory failure easily and immediately in the emergency patients.
Author Disclosures: T. Saitoh: None. H. Satoh: None. N. Kanayama: None. M. Niwayama: None. H. Hozumi: None. Y. Takahashi: None. T. Uchida: None. M. Saotome: None. T. Urushida: None. H. Katoh: None. H. Hayashi: None. A. Yoshino: None.
- © 2015 by American Heart Association, Inc.