10.2.4 Error E4: OCCLUSIONAn error E4: OCCLUSION occurs if insulin (a maximum of 3.5 units ofinsulin when using plastic cartridges or a maximum of 6 units of insulinwhen using Aventis Insuman Infusat glass cartridges*) is failed to bedelivered. This may be caused by:– a blocked infusion set or– a reused cartridge or– a dirty or damaged piston rod.This error is dependent upon several factors including your currenthourly basal rate and boluses. For example, a blocked infusion set –with a basal rate of 2.0 U/h (no additional boluses) would have an errorE4: OCCLUSION in approximately three hours or less using Accu-Chek3.15 ml plastic cartridges, depending on the type and severity of theblockage.WarningIf an error E4: OCCLUSION occurs, immediately checkyour blood glucose level, because insulin delivery hasbeen interrupted. If your blood glucose level is high,take appropriate actions according to your doctor’s orhealthcare team’s instructions.154Alerts and errors* Insuman ® Infusat produced by Aventis Pharma Deutschland GmbH, a member and a brandof the sanofi-aventis group.