photoelectric sphygmograph

例句：

1. 1. The photoelectric sphygmograph was used to monitor the patient's blood pressure.
   光电血压计被用来监测患者的血压。
2. 2. The new model of photoelectric sphygmograph has been introduced to improve accuracy.
   新型光电血压计已被引入以提升准确性。
3. 3. The doctor used the photoelectric sphygmograph to check the patient's heart rate and blood pressure.
   医生使用光电血压计检查了患者的心率和血压。