biology

Intravenous sodium bicarbonate

Intravenous sodium bicarbonate is a biology topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Intravenous sodium bicarbonate rather than just read about it. In short: Intravenous sodium bicarbonate, also known as sodium hydrogen carbonate, is a medication primarily used to treat severe metabolic acidosis. For this purpose it is generally only used when the pH is less than 7.1 and when the underlying cause is either diarrhea, vomiting, or the kidneys.

Key takeaways

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Connect Intravenous sodium bicarbonate to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Intravenous sodium bicarbonate from memory before moving on to harder problems.

Reference excerpt

Intravenous sodium bicarbonate, also known as sodium hydrogen carbonate, is a medication primarily used to treat severe metabolic acidosis. For this purpose it is generally only used when the pH is less than 7.1 and when the underlying cause is either diarrhea, vomiting, or the kidneys. Other uses include high blood potassium, tricyclic antidepressant overdose, and cocaine toxicity as well as a number of other poisonings. It is given by injection into a vein. Side effects may include low blood potassium, high blood sodium, and swelling. It is not recommended for people with a low blood calcium level. Sodium bicarbonate is in the alkalinizing family of medications. It works by increasing blood bicarbonate, which buffers excess hydrogen ion and raises blood pH. Commercial production of sodium bicarbonate began between 1791 and 1823. Intravenous medical use began around the 1950s. It is on the World Health Organization's List of Essential Medicines. Sodium bicarbonate is available as a generic medication.

Medical uses Intravenous sodium bicarbonate is indicated in the treatment of metabolic acidosis, such as can occur in severe kidney disease, diabetic ketoacidosis, circulatory insufficiency, extracorporeal circulation of blood, in hemolysis requiring alkalinization of the urine to avoid nephrotoxicity of blood pigments, and certain drug intoxications, such as by barbiturate overdose, salicylate poisoning, tricyclic antidepressant overdose or methanol poisoning. In addition, sodium bicarbonate is indicated in severe diarrhea, where large amounts of bicarbonate may be lost. However, overall treatment should also strive to treat the underlying cause of the acidosis, such as giving insulin in case of diabetic ketoacidosis.

Dhaka fluid

Dhaka fluid is one of the IV fluids used in intravenous rehydration therapy which has sodium bicarbonate content in it. Used as a resuscitative fluid in burn management.

Contraindications Intravenous sodium bicarbonate is contraindicated in patients who are losing chloride, such as by vomiting. Because of its sodium content, intravenous sodium bicarbonate should be used with great care, if at all, in patients with congestive heart failure and severe chronic kidney disease, where low sodium intake is strongly indicated to prevent sodium retention. By similar rationale, intravenous sodium bicarbonate should be given with caution to patients receiving corticosteroids.

Side effects Extravasation of intravenous sodium bicarbonate has been reported to cause chemical cellulitis because of its alkalinity, resulting in tissue necrosis, ulceration and/or sloughing at the site of infiltration. This condition is managed by prompt elevation of the part, warmth and local injection of lidocaine or hyaluronidase.

Interactions Norepinephrine and dobutamine cannot be used as additives in an intravenous sodium bicarbonate solution. Intravenous sodium bicarbonate should not be mixed with calcium, as they may precipitate, except where compatibility has been previously established for the preparations at hand.

Overdosing Overdose of intravenous sodium bicarbonate results in solute and/or fluid overload, potentially leading to edema, including pulmonary edema. Also, it can cause metabolic alkalosis (with signs including muscular twitchings, irritability and tetany). Hypernatremia is also possible. Repeated fractional doses and frequent monitoring by laboratory tests are recommended to minimize the possibility of overdosing. Rapid administration (equal to or exceeding 10 mL/min) of intravenous sodium bicarbonate into neonates and children under two years of age may produce hypernatremia, resulting in a decrease in cerebrospinal fluid pressure and, possibly, intracranial hemorrhage. Therefore, the rate of administration to such patients should not exceed 8 mEq/kg/day, unless a very strong indication is present.

Composition It is administered as a hypertonic solution of sodium bicarbonate, most commonly in concentrations of 4.2%, 5.0%, 7.5% or 8.4%. The solutions generally contain no antimicrobial agent or other added buffer.

Mechanism of action After injection, intravenous sodium bicarbonate dissociates to provide sodium (Na+) and bicarbonate (HCO3−) anions. Bicarbonate anions can consume hydrogen ions (H+) and thereby be converted to carbonic acid (H2CO3), which can subsequently be converted to water (H2O) and carbon dioxide (CO2) which can be excreted by the lungs.

Society and culture The Italian physician Tullio Simoncini has claimed that intravenous sodium bicarbonate is an effective cancer therapy. This is rejected by mainstream medicine. Simoncini has been imprisoned twice for culpable manslaughter of people affected by cancer.

References

External links Intravenous sodium bicarbonate at Drugs.com, with more detailed dosages

Illustrations

Worked examples

Example 1 — a first encounter with Intravenous sodium bicarbonate

Start with the simplest possible case. Write down what Intravenous sodium bicarbonate claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In biology, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Intravenous sodium bicarbonate before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Intravenous sodium bicarbonate ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Intravenous sodium bicarbonate

In research: Intravenous sodium bicarbonate appears in biology research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Intravenous sodium bicarbonate in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Intravenous sodium bicarbonate is common in secondary-school and first-year university syllabi. It links to neighbouring topics Alternative cancer treatments, Intravenous fluids, Sodium bicarbonate, so understanding it makes those chapters shorter.
In everyday life: Look for Intravenous sodium bicarbonate outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Intravenous sodium bicarbonate in 20 minutes

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Close the page and write down what Intravenous sodium bicarbonate means in your own words.
Compare your version with the excerpt and mark what you missed.
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Frequently asked questions

What is Intravenous sodium bicarbonate in simple terms?

Why does Intravenous sodium bicarbonate matter?

Because it connects several biology ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Intravenous sodium bicarbonate?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Intravenous sodium bicarbonate.