Key Features:

• The surface of the three balls spirometer is designed to be clean, without blot, impurities, or breakage. Containing marks are clear and easy to read.
• Volume tolerance of the containing mark is within the range of ±10% of the labeled value.
• Assists in lung expansion and accelerates expansion of the remaining lung after resection to eradicate residual cavity.
• Promotes chest expansion to form intrathoracic negative pressure, advancing lung expansion and re-expanding small alveoli to prevent atelectasis.
• Adjusts pulmonary pressure to increase pulmonary ventilation and tidal volume while slowing respiratory frequency to reduce postoperative pain.