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.
It is normal to go 2-4 days without one. Stress, poor diet, dehydration, antibiotics and other medications can cause you not to go. If you have not had a bowel movement in 4 to 5 days and you have bloating, pain, fever, or general fatigue(any or all of these symptoms), yu need to seek medical advice. These are symptoms of irritable bowel, a blockage, even cancer. Go see your doc.