2 DOSAGE AND ADMINISTRATION2.1 Preparation for AdministrationDo not administer unless solution is clear and seal is intact. Parenteral drug products should be inspected visually for particulate matter and discoloration prior to administration, whenever solution and container permit.Warning: Do not use plastic containers in series connection. Such use could result in air embolism due to residual air being drawn from the primary container before administration of the fluid from the secondary container is completed.Do not use Heparin Sodium in Sodium Chloride Injection as a "catheter lock flush" product.Do not admix with other drugs. Discard unused portion.To OpenTear outer wrap at notch and remove solution container.Preparation for Administration(Use aseptic technique)Close flow control clamp of administration set.Remove cover from outlet port at bottom of container.Insert piercing pin of administration set into port with a twisting motion until the set is firmly seated. NOTE: When using a vented administration set, replace bacterial retentive air filter with piercing pin cover. Insert piercing pin with twisting motion until shoulder of air filter housing rests against the outlet port flange.Suspend container from hanger.Squeeze and release drip chamber to establish proper fluid level in chamber.Attach venipuncture device to set.Open clamp to expel air from set and venipuncture device. Close clamp.Perform venipuncture.Regulate rate of administration with flow control clamp.2.2 Recommended Dosage for Maintenance of Catheter PatencyThe recommended starting dose is 6 units per hour by intravenous infusion through an intravenous catheter to maintain catheter patency.