Evidence for Increased Intraabdominal Pressure As a Cause of Recurrent Migration of the Distal Catheter of a Ventriculoperitoneal Shunt: Illustrative Case

Overview

Journal J Neurosurg Case Lessons

Specialty Neurology

Date 2022 Aug 29

PMID 36034506

Authors

Christopher Lee

Lucinda Chiu

Pawan Mathew

Gabrielle Luiselli

Charles Ogagan

Rrita Daci

Brittany Owusu-Adjei

Rona S Carroll

Mark D Johnson

Affiliations

Soon will be listed here.

Abstract

Background: Placement of a ventriculoperitoneal (VP) shunt is an effective treatment for several disorders of cerebrospinal fluid flow. A rare complication involves postoperative migration of the distal catheter out of the intraperitoneal compartment and into the subcutaneous space. Several theories attempt to explain this phenomenon, but the mechanism remains unclear.

Observations: The authors report the case of a 37-year-old nonobese woman who underwent placement of a VP shunt for idiopathic intracranial hypertension. Postoperatively, the distal catheter of the VP shunt migrated into the subcutaneous space on three occasions despite the use of multiple surgical techniques, including open and laparoscopic methods of abdominal catheter placement. Notably, the patient repeatedly displayed radiographic evidence of chronic bowel distention consistent with increased intraperitoneal pressure.

Lessons: In this case, the mechanism of catheter migration into the subcutaneous space did not appear to be caused by pulling of the catheter from above but rather by expulsion of the catheter from the peritoneum. Space in the subcutaneous tissues caused by open surgical placement of the catheter was permissive for this process. Patients with chronic increased intraabdominal pressure, such as that caused by bowel distention, obesity, or Valsalva maneuvers, may be at increased risk for distal catheter migration.

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