Extraction of arterial blood pressure signal from intraluminal impedance signals

Multichannel intraluminal procedure provides information about the esophagus status, reflux occurrence, and clearance mechanism. The study of the impedance signals has been concentrated on the study of reflux patterns and clearance mechanisms. However, there are a number of sources that results in the variations seen in impedance signal. These sources include esophageal characteristic, reflux occurrence, catheter movement, arterial blood pressure and respiration signal. This paper presents the use of the blind signal separation to extract the arterial blood pressure signal from the impedance signals. The extracted signal is further processed to get clean arterial blood pressure signal. The respiration signal can also be extracted in a similar approach.