noun
definition
Obstruction of the bowel in which a loop of bowel has abnormally twisted on itself.
Examples of volvulus in a Sentence
The mortality associated with an acutely obstructed volvulus may be up to 50% .
The diagnosis of sigmoid volvulus in our patient was confirmed at surgery.
We present the history of a patient with an acute gastric volvulus and unexplained hypotension.
Factors associated with mortality and morbidity in small intestinal volvulus in the horse.
Onchocerca volvulus is a nematode that causes onchocerciasis (river blindness) in West Africa and Central America.
In India approximately 30 per cent of acute intestinal obstructions are secondary to volvulus of the sigmoid colon [3 ].
The mortality associated with an acutely obstructed volvulus may be up to 50 %.
Duodenal atresia can occur with other conditions such as a narrowing of the duodenal lumen (duodenal stenosis) or twisting of the duodenum around itself (duodenal volvulus).
It may also occur in combination with volvulus in another part of the bowel below the duodenum.
Malrotation can also occur with duodenal volvulus or volvulus lower in the bowel.
Malrotation or coiling of the duodenum can also obstruct the duodenum, sometimes accompanied by volvulus, a twisting of the duodenum around itself.
If the duodenum is twisted as in volvulus, the newborn may have a distended abdomen and bloody diarrhea.
If malrotation or duodenal volvulus has caused the blood supply to be cut off in a portion of the intestine before surgery, death of intestinal tissue can result and life-threatening gangrene can develop.
One type of mechanical obstruction is caused by the bowel twisting on itself (volvulus) or telescoping into itself (intussusception).
Mechanical obstruction in infants under one year of age can be caused by meconium ileus, volvulus, intussusception, and hernias.
Volvulus is the twisting of the small or large bowel around itself (malrotation).
Volvulus of the large bowel is rare in infants and children; when it does occur it is usually in the sigmoid (sigmoid volvulus) in the lower colon.
Duodenal volvulus occurs when the duodenum, the portion of small intestine that connects the stomach and jejunum, is twisted.
Volvulus occurs in older children (mean age seven years) with a male to female ratio of 3.5 to one.
The causes of small bowel obstruction in children are most often volvulus, intussusception, adhesions, or abdominal hernia, a weakness in the abdominal wall that traps a portion of intestine.
The most frequent causes of large-bowel obstruction are tumors, volvulus, or small pouches that form on the intestinal wall (diverticula) that can fill with waste and expand to block the intestines.
With volvulus, for example, it may be possible to guide a rectal tube into the intestines to straighten the twisted bowels.
Recurrence is likely in as many as 80 percent of those in whom volvulus is treated medically rather than surgically.
This happens when the bowel twists on itself (volvulus) or as the result of hernias, impacted feces, abnormal tissue growth, or the presence of foreign bodies in the intestines.