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Nothing by mouth is an American medical instruction meaning to withhold food and fluids. It is also known as nil per os (npo or NPO), a Latin phrase that translates to English as "nothing through the mouth". Nil by mouth is the term used in the UK (NBM), nihil/non/nulla per os, or complete bowel rest. [1]
Fluid replacement or fluid resuscitation is the medical practice of replenishing bodily fluid lost through sweating, bleeding, fluid shifts or other pathologic processes. . Fluids can be replaced with oral rehydration therapy (drinking), intravenous therapy, rectally such as with a Murphy drip, or by hypodermoclysis, the direct injection of fluid into the subcutaneous tis
NS is used frequently in intravenous drips (IVs) for patients who cannot take fluids orally and have developed or are in danger of developing dehydration or hypovolemia. NS is typically the first fluid used when hypovolemia is severe enough to threaten the adequacy of blood circulation, and has long been believed to be the safest fluid to give ...
This occurs when these over-concentrated solutions sit in the gut and draw water from the rest of the body, and the reduced fluids in the body's tissues then have a higher proportion of salt to fluid. Children with serum sodium greater 150 mmol/liter have thirst out of proportion to other signs of dehydration.
The formula of the fluid replacement solution was 4 g of sodium chloride, 25 g of glucose, and 1000 mL of water. [44] [45] He did not publish any balance data, and his exclusion of patients with severe dehydration did not lead to any confirming study; his report remained anecdotal. [citation needed]
Ringer's lactate solution is commonly used for fluid resuscitation after blood loss due to trauma, or surgery. [9] [10]It is extensively used in aggressive volume resuscitation, e.g. for patients with pancreatitis, hemorrhagic shock or major burn injuries. [10]
Prior to fluids or medicines being given intravenously, the Murphy drip and hypodermoclysis were the prime routes to administer fluids such as for replacement when patients could not be fed by mouth. [5] American surgeon John Benjamin Murphy introduced the drip method of saline infusion per rectum in the treatment of peritonitis. [6]
Preoperative fasting is the practice of a surgical patient abstaining from eating or drinking ("nothing by mouth") for some time before having an operation.This is intended to prevent stomach contents from getting into the windpipe and lungs (known as a pulmonary aspiration) while the patient is under general anesthesia. [1]