Fig. 1

Diagram of the position of the end of the peritoneal end of the shunt tube over time and in patients with normal shunt function. A The position of the end of the peritoneal end of the shunt tube over time under normal conditions (different colors represent the position change). B The position of the end fixation does not change with time when there is local wrapping adhesion in the peritoneal end of the shunt tube. C A 34-year-old male patient underwent ventriculoperitoneal shunt due to right ventricular obstructive hydrocephalus. In 1 week post-operation, the shunt was functioning properly. The plain abdominal radiograph examination revealed the presence of the abdominal segment and the edge of the shunt. (arrow) D Upon reexamination of the plain abdominal radiograph 6 h later, a notable shift in the position of the end of the abdominal segment of the shunt tube was observed compared to its position 6 h prior (arrow)