The purpose of this study is to gather measurement data for the development and testing of a wearable patient monitor's pulse oximeter. The PaMo patient monitor measures respiratory rate, blood oxygen saturation, and electrocardiogram (ECG). The device transmits data via Bluetooth to a mobile application for immediate interpretation. The device, developed at Tampere University, aims to provide a wireless solution for monitoring patients' breathing and circulation, especially after surgical procedures. The collected data will be used to demonstrate the device's oxygen saturation measurement capability according to the European ISO 80601-2-61:2019 standard, contributing to further refinement of the solution.