Described are peritoneal catheter devices and methods for positioning these devices in a medical patient. The peritoneal catheter includes a catheter tube having a proximal end portion opposite a distal end portion, a stationary flange attached to the catheter tube near the distal end portion, and a mobile flange positioned on the catheter tube between the stationary flange and the proximal end portion. In use, the stationary flange is positioned to cover a hole in the rectus muscle and the mobile flange is selectively moved along the catheter tube to sandwich the rectus muscle of the patient between the stationary flange and the mobile flange. Optionally an interior cuff is mounted on the catheter tube adjacent to the stationary flange but between the stationary flange and the mobile flange and wherein the selectively positioning the mobile flange includes sandwiching the interior cuff between the stationary flange and the mobile flange.
