In 2004 a study reviewed the TOSCA monitor, made by Linde Medical Sensors, which combined pulse oximetry and TCCO2 monitoring. This machine used a single ear sensor which worked at 42 degrees C to enhance blood flow in capillaries below the sensor. This study included 60 neonates who had an ear sensor placed on the right earlobe. Ten minutes after placement, an ABG was performed and compared to the TCCO2 reading. The transcutaneous readings were found to be clinically acceptable when compared to the ABGs. A secondary benefit of the transcutaneous monitoring on the earlobe was a decrease in the head movement of the neonate to aid in maintaining a patent airway. In addition, the sensor did not have to be removed for chest radiographs or while the parent was bonding with his or her infant in their lap (also known as "kangaroo care").