In patients undergoing spinal anesthesia, the investigators used an Infra-red camera and a respiratory volume monitor to determine the accuracy of the ventilation rate of the infra red camera by measuring the respiratory rate, ventilation volume, and ventilation volume with respiratory volume monitor.

Inclusion Criteria:

• An adult male who underwent endoscopic prostatectomy resection with regular surgery
• An adult male who underwent endoscopic bladder resection with regular surgery

Exclusion Criteria:

• Presenting alteration in respiratory function detected by functional analysis of lung volume and capacity- pneumonectomy patient, severe ipsilateral destroyed lung patient
• Inability to understand or perform the procedure
• ASA(American Society of Anesthesiologists) class 4,5