MECHANICAL means have in the past been tested to drain peritoneal fluid into the venous system1,2 but none has been successful due mainly to a propensity for clotting. The analogous problem of draining cerebrospinal fluid in hydrocephalus has been assisted by insertion of a manually compressable subcutaneous pump in the line which helps to keep the system patent.3,4 Smith reported using such a device for drainage of ascitic fluid in one patient.5 This is a report of the development of a peritoneal-right atrial shunt fitted with a plastic clearing pump that has been used in eight patients.
Description of Device
The shunt has three elements: the intraperitoneal collecting sump, the connecting tubes containing the one-way valves, and the flushing pump. Each has undergone progressive modification during this clinical experience.6,7 The shunt now used is illustrated (Fig 1).
—The intraperitoneal collecting device consists of a double