Abstract.[Purpose] The aim of this study was to standardize the timing of breathing, pressure and direction of pressing for removing secretions retained in the airway.[Methods] Nine respiratory therapists with work experience of 5 to >21 years cooperated to establish the standard values. A model to record the timing, pressure, and direction of pressing during compression was prepared. Sixty sensors were arranged corresponding to a handprint on the right chest, the site of pressing, on a mannequin, and the respiratory therapists performed compression using this model. [Results] Timing: Based on the waveforms, the subjects gradually increased the pressure, held their position after reaching the peak, and then sharply reduced the force. Pressure: The compression strength varied among the subjects, but the mean peak sensor value was 400-900, corresponding to about 1-2 kg/cm 2 . Direction of pressing: The pressure was transmitted from the shoulder side toward the bronchial bifurcation.[Conclusion] In compression performed by 9 respiratory therapists, increasing the pressure to the peak and a subsequent reduction with the respiratory cycle were the main points regarding timing. The mean peak pressure was within the range of 1-2 kg/ cm 2 . The direction of pressing was from the upper region of the lung toward the bronchial bifurcation.

Purpose This study aimed to develop a linguistically validated Japanese translation of the multidimensional dyspnea profile (MDP) and assess whether worsening of dyspnea’s sensory and affective domains during exercise had detrimental effects on physical activity in stable outpatients with chronic obstructive pulmonary disease (COPD). Materials and Methods The Japanese version of the MDP was prepared in collaboration with Mapi Research Trust (Lyon, France) after the approval of the developer. Physical activity was assessed using a 3-axis accelerometer. Dyspnea upon exertion was investigated using a 3-minute step test. Results The Japanese version of the MDP was obtained and validated linguistically. Air-hunger was significantly associated with total calories from walking (r = − 0.47, p < 0.05), while anxiety and depression were significantly correlated with both the amount and intensity of physical activity (r = − 0.49, p < 0.05, and r = − 0.46, p < 0.05, respectively). Conclusion The Japanese version of the MDP was suggested to reflect both pulmonary functions, ventilatory response during exercise, and intensity and amount of physical activity in patients with COPD.