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Parenteral nutrition (PN), or intravenous feeding, is the feeding of nutritional products to a person intravenously, [1] bypassing the usual process of eating and digestion. The products are made by pharmaceutical compounding entities or standard pharmaceutical companies.
Routes can also be classified based on where the target of action is. Action may be topical (local), enteral (system-wide effect, but delivered through the gastrointestinal tract), or parenteral (systemic action, but is delivered by routes other than the GI tract). Route of administration and dosage form are aspects of drug delivery.
After more than approximately two days, a more complete regimen of total parenteral nutrition is indicated. In patients with hypernatremia and euvolemia, free water can be replaced using either 5% D/W or 0.45% saline. In patients with fatty-acid metabolism disorder (FOD), 10% solution may be appropriate upon arrival to the emergency room.
It is the method of choice for patient-controlled analgesia (PCA), in which repeated small doses of opioid analgesics are delivered, with the device coded to stop administration before a dose that may cause hazardous respiratory depression is reached. Total parenteral nutrition usually requires an infusion curve similar to normal mealtimes.
The emulsion is used as a component of intravenous nutrition for people who are unable to get nutrition via an oral diet. These nutrients are combined with the intention of administering parenteral nutrition, where nutrients are delivered in an alternative pathway other than the gastrointestinal tract.
Methods of administration include oral, sublingual (dissolving the drug under the tongue), and rectal. Parenteral administration is via a peripheral or central vein. [1] In pharmacology, the route of drug administration is important because it affects drug metabolism, drug clearance, and thus dosage. The term is from Greek enteros 'intestine'.
Intravenous therapy (abbreviated as IV therapy) is a medical technique that administers fluids, medications and nutrients directly into a person's vein.The intravenous route of administration is commonly used for rehydration or to provide nutrients for those who cannot, or will not—due to reduced mental states or otherwise—consume food or water by mouth.
Systemic administration is a route of administration of medication, nutrition or other substance into the circulatory system so that the entire body is affected. [1] Administration can take place via enteral administration (absorption of the drug through the gastrointestinal tract) [ 2 ] or parenteral administration (generally injection ...
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