Case Report: A case report of dry tap during ventriculostomy
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Updated: Mar 20, 2026

Neuronavigation and Laparoscopy Guided Ventriculoperitoneal Shunt Insertion for the Treatment of Hydrocephalus
Published on: October 14, 2022
Sunil Munakomi1, Binod Bhattarai1
1Department of Neurosurgery, College of Medical Sciences, Bharatpur, 44207, Nepal.
Abstract:
Pneumocephalus following ventriculoperitoneal (VP) shunt insertion is an exceptionally rare occurrence. We report such an event after attempting ventricular puncture (ventriculostomy) for VP shunt insertion and then discuss the management of the same. Dry tap can lead to multiple attempts for ventriculostomy with the associated added risks of complications, as well as complicating the subsequent management. In addition, there is an increased risk of tension pneumocephalus, seizure and shunt failure due to a blockage by air bubbles. Our patient presented with features of raised intracranial pressure two months following craniotomy and evacuation of traumatic subdural hematoma. External ventricular puncture revealed egress of CSF under pressure. Upon attempting VP shunting for post-traumatic hydrocephalus, we experienced dry tap during ventricular puncture that complicated further management. We placed the proximal shunt in the presumed location of the foramen of Monro of ipsilateral frontal horn of lateral ventricle and did not remove the external ventricular drain. Post-operative CT scan revealed pneumoventriculi as the cause for the dry tap during ventricular puncture. Patient was managed with 100% oxygen. He showed gradual improvement and was later discharged. This case shows that variations in the procedure, including head down positioning, adequate cruciate dural incision prior to cortex puncture, and avoiding excessive egress of CSF can help to prevent such complications.
Insights
Pneumocephalus, a rare complication of ventriculoperitoneal shunt surgery, occurred after multiple ventricular puncture attempts. Management with 100% oxygen led to patient recovery and highlights procedural adjustments for prevention.
Area of Science:
- Neurosurgery
- Neurology
- Medical Imaging
Background:
- Pneumocephalus is an exceptionally rare complication following ventriculoperitoneal (VP) shunt insertion.
- Dry taps during ventricular puncture can necessitate multiple attempts, increasing complication risks like tension pneumocephalus, seizures, and shunt failure.
- Post-traumatic hydrocephalus can present with raised intracranial pressure, requiring intervention such as VP shunting.
Purpose of the Study:
- To report a rare case of pneumocephalus after VP shunt insertion.
- To discuss the management of pneumocephalus in this context.
- To identify preventive measures for this complication.
Main Methods:
- Case report of a patient with post-traumatic hydrocephalus.
- Description of the VP shunt insertion procedure, including challenges with ventricular puncture (dry tap).
- Post-operative imaging (CT scan) to identify pneumoventriculi and management with 100% oxygen therapy.
Main Results:
- A dry tap during ventricular puncture for VP shunt insertion led to pneumoventriculi, confirmed by CT scan.
- The patient was successfully managed with 100% oxygen, showing gradual improvement.
- No immediate complications such as tension pneumocephalus or shunt failure were observed.
Conclusions:
- Procedural modifications, including head-down positioning, adequate dural incision, and minimizing cerebrospinal fluid (CSF) egress, can help prevent pneumocephalus.
- 100% oxygen administration is an effective management strategy for pneumocephalus.
- Careful surgical technique is crucial to avoid complications during VP shunt placement, especially in cases with challenging ventricular access.
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