Frequency Spectral Evaluation about Hemoglobin Kinetics of Pedal Circulation Attend to Laminar Layer with Near Infrared Spectroscopy in Sound Horse

Abstract

This study observed the fluctuation of total hemoglobin (tHb) and reduced hemoglobin (dHb) concentrations as a direct reflection of hemodynamics under the hoof wall with near infrared spectroscopy (NIRS). NIRS observation of the laminar layer under the pigmented hoof walls was performed without sedation or invasion on five clinically normal horses. NIRS indexes relating to the concentration change of tHb (tHbindex) and dHb (dHbindex) in tissue were