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[Clinical analysis of pediatric shunt catheter fracture]
Akitsugu Morishita1, Tatsuya Nagashima, Hiromitsu Kurata
1Department of Neurosurgery, Kobe Children's Hospital, Japan.
Insights
Pediatric ventriculoperitoneal shunt revisions are often due to catheter fractures, particularly during rapid growth. Minimizing surgical repair time is crucial for children
Area of Science:
- Neurosurgery
- Pediatric Surgery
- Biomedical Engineering
Context:
- Shunt dysfunction is a common complication in pediatric hydrocephalus management.
- Ventriculoperitoneal (VP) shunts are frequently revised due to mechanical failure.
- Catheter fracture represents a significant cause of VP shunt revision in children.
Purpose:
- To analyze the incidence, causes, and mechanical factors of VP shunt catheter fractures in pediatric patients.
- To identify peak incidence periods and contributing factors for shunt catheter failure.
- To discuss the mechanical aspects of shunt catheter fracture and suggest improvements.
Summary:
- A retrospective analysis of 36 VP shunt revisions for catheter fracture in 35 pediatric patients (under 18) was conducted.
- Common reasons for shunt revision included obstruction, infection, and disconnection, with catheter fracture being a focus.
- Peak incidence of catheter fracture occurred during rapid growth phases, particularly in elementary school-aged children, due to traction and shearing strain.
Impact:
- Identifies rapid growth and specific anatomical stress points as key contributors to shunt catheter fracture.
- Highlights the need for stronger shunt catheter materials to minimize revision surgeries and protect neurodevelopment.
- Emphasizes the importance of addressing shearing strain in shunt catheter design and surgical placement.
Abstract:
Between 1985 and 1998, 415 shunt dysfunctions occurred at Kobe Children's Hospital. The main reasons for shunt revision were obstruction of the catheter, shunt infection, and shunt disconnection. This report presents an analysis of 35 patients (36 cases) who underwent a ventriculoperitoneal (VP) shunt revision because of shunt catheter fracture. All patients were less than 18 years old. We researched their age at the time of revision, site of disruption, postoperative period, shunt system, clinical symptoms, and other factors. The mechanical aspects of shunt catheter fracture are also discussed in this report. The peak time of shunt catheter fracture was the time when children were growing up and were entering elementary school. In other words, when their height was increasing rapidly. At that time, the distal catheter is subjected to traction between the valve and the abdomen at the site of insertion in either the upper or lower direction. However, physical examination of the shunt catheter showed normal range. Additional contributory factors were chronic stimulation at the occipital bone, clavium bone, and costal arch, while movement of the neck and body rotation also caused shunt catheter fracture. These factors all originated from shearing strain at the shunt catheter. We look forward to the introduction of a stronger shunt catheter, because surgical repair time must be minimized to protect the child's mental development. In addition, shearing strain at the shunt catheter needs special attention.