11.   Doctors inserted a flexible tube into the narrowed artery carrying a collapsed balloon.

12.   If more tests are needed, doctors can turn to colonoscopy, which involves inserting a long flexible tube through the rectum to view the entire colon.

13.   On Monday, doctors inserted a flexible tube into the narrowed artery carrying a collapsed balloon.

14.   Once a patient is sedated, the doctor threads a flexible tube containing an optical scope up the colon.

15.   Sigmoidoscopy uses a flexible tube inserted through the rectum into the large intestine to detect polyps or cancerous tumors.

16.   The procedure involves a doctor using a flexible tube to look into the colon.

17.   The procedure uses a flexible tube containing an optical scope that enables the doctor to view the entire length of the colon.

18.   The test, during which a flexible tube is inserted into an artery and dye is injected, found the constricted artery.

19.   The test, during which a flexible tube is inserted into an artery and dye is injected, revealed one artery was seriously constricted.

20.   The test, during which a flexible tube is inserted into an artery and dye is injected, revealed the problem.