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Subcutaneous catheter calcification in ventriculoperitoneal shunts
1Department of Radiology, Children's Medical Center, Dallas, TX 75235, USA.
AJNR. American Journal of Neuroradiology
|June 1, 1995
Summary
Dystrophic calcification can form around long-standing Silastic ventriculoperitoneal shunts, potentially causing catheter tethering and disconnection. This finding highlights a complication of shunts used for cerebrospinal fluid management.
Area of Science:
- Neurosurgery
- Radiology
- Biomaterials Science
Background:
- Ventriculoperitoneal shunts are crucial for managing hydrocephalus.
- Silastic catheters are commonly used in these shunt systems.
- Long-term implantation can lead to material degradation and complications.
Observation:
- Three male patients with long-standing Silastic ventriculoperitoneal shunts presented with a unique radiographic finding.
- A sleeve of dystrophic calcification was observed surrounding the shunt catheter at the thoracic inlet.
- This calcification was visible on plain radiographs.
Findings:
- The observed calcification indicates degeneration and tethering of the shunt catheter.
- In two of the three patients, this calcification was associated with shunt disconnection.
- This suggests a potential mechanism for shunt failure.
Implications:
- This radiographic finding serves as an important indicator of shunt integrity.
- Early recognition of dystrophic calcification may allow for timely intervention to prevent shunt failure.
- Further research into the long-term material properties of Silastic shunts is warranted.
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