Comparative Study

Esophageal pulse oximetry utilizing reflectance photoplethysmography.

IEEE Trans Biomed Eng. 2002 Nov 1;49(11):1360-8.
Comparative Study

"Motion-resistant" pulse oximetry: a comparison of new and old models.

Anesth. Analg. 2002 Oct 1;95(4):967-72, table of contents.
Comparative Study

Evaluation of efficacy of a new custom-made pulse oximeter dental probe in comparison with the electrical and thermal tests for assessing pulp vitality.

J Endod. 2007 Apr 1;33(4):411-4.