relaxometer

例句：

1. 1. The doctor uses a relaxometer to measure the patient's heart rate during anesthesia.
   医生使用放松计来测量患者在麻醉期间的心率。
2. 2. The engineer used the relaxometer to monitor the patient's blood pressure during surgery.
   工程师使用放松计来监测患者在手术期间的血压。
3. 3. The relaxation technique involves using a relaxometer to help patients reduce their muscle tension.
   放松技术涉及使用放松计帮助患者减少肌肉紧张。