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.
Quick Answer. A bowel movement usually occurs between 6 and 12 hours after Senokot is taken, explains Drugs.com. The medication is a stimulant laxative that produces bowel movements by irritating the bowel tissues, which promotes intestinal contractions that move the food through the gastrointestinal tract. Continue Reading.