pyloroscopy

例句：

1. 1. He underwent pyloroscopy to diagnose the cause of his stomach pain.
   他进行了内窥镜检查以诊断他的胃痛原因。
2. 2. The doctor recommended a gastric pyloroscopy for his chronic stomach ulcers.
   医生建议他进行一次胃的内窥镜检查，因为他有慢性胃溃疡。
3. 3. During the procedure, the patient was given anesthesia and then underwent a pyloroscopy to remove the polyp.
   在手术过程中，病人接受了麻醉，然后进行了内窥镜检查来切除息肉。