SF 6 is used as a contrast agent for ultrasound imaging. Sulfur hexafluoride microbubbles are administered in solution through injection into a peripheral vein. These microbubbles enhance the visibility of blood vessels to ultrasound.F 6 is used as a contrast agent for ultrasound imaging. Sulfur hexafluoride microbubbles are administered in solution through injection into a peripheral vein. These microbubbles enhance the visibility of blood vessels to ultrasound.
Once constipation (no bowel movement) has gone on for some time, the result can be what is known as an impacted bowel (sometimes called fecal impaction). Essentially, this means that a large lump of dry, hard stool is stuck inside your rectum.
Real-life user stories relating to Bowel movements: 1  Severe Fatigue after Bowel Movement. 2  extremely painful bowel movements. 3  Lack of Bowel Movement for 4 days, extreme gas pains, 4  Blacked out after bowel movement. 5  Constant urge for bowel movement. 6  Almost constant bowel movement and other strange symptoms.