Ventriculoperitoneal (VP) Shunt
A ventriculoperitoneal shunt is a surgical method in which excess cerebrospinal fluid (CSF) accumulating in the brain ventricles is diverted through a catheter-and-valve system to the abdominal cavity (peritoneum), where it is absorbed. It is used in the treatment of hydrocephalus to lower intracranial pressure.
Last updated: 2026-06-09
Definition
A VP shunt is a permanent drainage system placed to remove excess fluid when the normal circulation or absorption of cerebrospinal fluid is disrupted. The system has three main parts: a proximal catheter placed in the ventricle, a valve that regulates flow, and a distal catheter that carries fluid to the abdominal cavity. The peritoneal membrane absorbs the diverted CSF and returns it to the circulation. The valve allows controlled drainage according to its pressure or flow setting.
Indications
A VP shunt is considered in cases of hydrocephalus confirmed by imaging and clinical findings. These may include congenital hydrocephalus, hydrocephalus developing after hemorrhage or infection, obstruction of CSF circulation due to a tumor, and normal pressure hydrocephalus. The indication relies on ventricular enlargement being consistent with the clinical picture (headache, altered consciousness, gait disturbance, or increasing head circumference in children). Not every type of hydrocephalus requires a shunt; alternative methods are evaluated in some cases.
Procedure
The procedure is usually performed under general anesthesia. A small hole (burr hole) is made in the skull, the proximal catheter is placed in the ventricle and connected to the valve. The distal catheter is tunneled under the skin to the abdomen and placed into the peritoneal cavity through a small incision. The patency of the system and the flow of fluid are checked. In programmable valves, the pressure setting can be changed externally after surgery with a magnetic device.
Advantages and Limitations
The VP shunt is one of the fundamental methods in the treatment of hydrocephalus, with many years of experience and broad clinical use; it effectively lowers intracranial pressure in many patients. However, the system is a mechanical device and may require lifelong follow-up. Limitations include obstruction, infection, over- or under-drainage, and the need for catheter revision as children grow. In some suitable cases, shunt-free options such as endoscopic third ventriculostomy may be evaluated.
Recovery and Risks
Recovery time varies by patient and the underlying condition; many patients mobilize within a few days. Possible risks include shunt infection, proximal or distal obstruction, subdural collection due to overdrainage, catheter disconnection, and the system needing revision over time. Signs of malfunction (headache, vomiting, altered consciousness) require urgent evaluation. No outcome is guaranteed; the decision is made individually by considering the patient's clinical status together with imaging findings.
References
- Winn HR, ed. Youmans Neurological Surgery. 6th ed. Saunders; 2011:516-524.
- Greenberg MS. Greenberg's Handbook of Neurosurgery. 10th ed. Thieme; 2023:453-458.
- Drake JM, et al. Randomized trial of cerebrospinal fluid shunt valve design in pediatric hydrocephalus. Neurosurgery. 1998.
- StatPearls — Ventriculoperitoneal Shunt. NCBI Bookshelf.
This article is for general information and does not replace a medical examination. Diagnosis and treatment decisions are individual.