infusion(redirected from constant-rate infusion)
Also found in: Dictionary, Thesaurus, Legal, Encyclopedia.
A herbal preparation in which a ground herb or plant component (e.g., bark, root, nuts or seeds) is boiled in water to obtain an extract of interest (e.g., chamomile, peppermint and rosehips).
A general term for a therapeutic tea made from ground herbs, which is boiled, steeped and ingested; in Chinese medicine, the terms herbal tea and infusion may be used interchangeably.
infusionMainstream medicine The administration of IV fluids. Parenteral nutrition. Cf Bolus Therapeutics IV infusion The introduction of a fluid, including medications, into the circulation. See Autoinfusion, Continuous infusion, Hepatic arterial infusion, Intracarotid infusion, Intrahepatic infusion, Intraosseous infusion, Intraperitoneal infusion, Intraventricular infusion.
infusion(in-fu'zhon ) [L. infusio, a pouring into, watering]
bone marrow infusion
continuous hepatic artery infusionAbbreviation: CHAI
continuous subcutaneous insulin infusionAbbreviation: CSII
Drugs infused intraosseously should be followed by a bolus of 5 mL or more of normal saline.
Many liquid preparations are given by intravenous (IV) infusion. Those commonly used include isotonic (normal) saline, lactated Ringer, dextrose 5% in water, and potassium chloride 0.2% in 5% dextrose. The type and quantity depend on the needs of the patient. The solution is usually given continuously at the rate of 1 to 2 or more liters per day. In shock, however, rapid infusion of larger volumes may be necessary to support the circulation.
Intravenous infusion is usually given in the arm through the median basilic or median cephalic vein, but veins at various other sites may be used. The vein must be exposed if a cannula is used. Introduction of solution should be at the rate required to deliver the needed amount of fluid and contained electrolytes, medicines, or nutrients in a prescribed time.
CAUTION!Intravenous infusions should be discontinued or infusion fluid replenished when the solution being administered is depleted. Clotting of blood in the catheter may occur when the infusion is not continuous.
Using scrupulous aseptic technique and universal precautions, the nurse prepares the IV infusion, selects and prepares a venous site, disinfects the skin, inserts an IV catheter or cannula to initiate the infusion (if an IV access is not in place), and secures it in place, restraining joint motion near the insertion site as necessary. The amount of fluid to be infused per hour is calculated and the flow of the prescribed fluid (and additive as appropriate) initiated at the desired flow rate. A pump or controller is typically used to ensure desired volume delivery. After initiating the infusion, the nurse ensures that the correct fluid is being administered at the designated flow rate and observes the infusion site and the patient at least every hour for signs of infiltration or other complications, such as infection, thrombophlebitis, fluid or electrolyte overload, and air embolism. The site dressing and administration set are changed according to protocol. Central venous catheters and lines are associated with more infections and more serious infections and other complications than peripheral catheters and lines. Strict protocols have been developed for their care.