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.
The worst thing now is the feeling that after a bowel movement, I feel that I'm not finished. So one of the things I've been doing for years is inserting my finger to get what's left out. I know this sounds awful.. and totally gross.. but I can't seem to break this habit.hen there are times when I feel an urgency.. lower abdominal cramps and the feeling I need to have a bowel movement.. and there's nothing there (maybe some mucous and a small amount of stool, but not enough to cause such an urgency).