Alcoholic ketoacidosis (AKA) is a specific group of symptoms and metabolic state related to alcohol use. Symptoms often include abdominal pain, vomiting, agitation, a fast respiratory rate, and a specific "fruity" smell. Consciousness is generally normal. Complications may include sudden death. AKA most commonly occurs in long term

alcoholics Alcoholism is, broadly, any drinking of alcohol that results in significant mental or physical health problems. Because there is disagreement on the definition of the word ''alcoholism'', it is not a recognized diagnostic entity. Predomina ...

and less commonly in those who binge drink. Onset is generally after a decreased ability to eat for a few days. Diagnosis is generally based on symptoms.

Blood sugar Glycaemia, also known as blood sugar level, blood sugar concentration, or blood glucose level is the measure of glucose concentrated in the blood of humans or other animals. Approximately 4 grams of glucose, a simple sugar, is present in the blo ...

levels are often normal or only mildly increased. Other conditions that may present similarly include other causes of

high anion gap metabolic acidosis High anion gap metabolic acidosis is a form of metabolic acidosis characterized by a high anion gap (a medical value based on the concentrations of ions in a patient's serum). Metabolic acidosis occurs when the body produces too much acid, or when ...

including

diabetic ketoacidosis Diabetic ketoacidosis (DKA) is a potentially life-threatening complication of diabetes mellitus. Signs and symptoms may include vomiting, abdominal pain, deep gasping breathing, increased urination, weakness, confusion and occasionally loss of ...

. Treatment is generally with intravenous

normal saline Saline (also known as saline solution) is a mixture of sodium chloride (salt) and water. It has a number of uses in medicine including cleaning wounds, removal and storage of contact lenses, and help with dry eyes. By injection into a vein i ...

and

intravenous sugar solution 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 nutrie ...

Thiamine Thiamine, also known as thiamin and vitamin B1, is a vitamin, an essential micronutrient, that cannot be made in the body. It is found in food and commercially synthesized to be a dietary supplement or medication. Phosphorylated forms of thi ...

and measures to prevent

alcohol withdrawal Alcohol withdrawal syndrome (AWS) is a set of symptoms that can occur following a reduction in alcohol use after a period of excessive use. Symptoms typically include anxiety, shakiness, sweating, vomiting, fast heart rate, and a mild fever. M ...

are also recommended. Treatment of

low blood potassium Hypokalemia is a low level of potassium (K+) in the blood serum. Mild low potassium does not typically cause symptoms. Symptoms may include feeling tired, leg cramps, weakness, and constipation. Low potassium also increases the risk of an abnor ...

may also be required. Those who are affected are most frequently between the ages of 20 and 60. The condition was initially recognized in 1940 and named in 1971.

Signs and symptoms

Nausea Nausea is a diffuse sensation of unease and discomfort, sometimes perceived as an urge to vomit. While not painful, it can be a debilitating symptom if prolonged and has been described as placing discomfort on the chest, abdomen, or back of the ...

, vomiting, and abdominal pain are commonly present and people may also have

tachypnea Tachypnea, also spelt tachypnoea, is a respiratory rate greater than normal, resulting in abnormally rapid and shallow breathing. In adult humans at rest, any respiratory rate of 1220 per minute is considered clinically normal, with tachypnea b ...

tachycardia Tachycardia, also called tachyarrhythmia, is a heart rate that exceeds the normal resting rate. In general, a resting heart rate over 100 beats per minute is accepted as tachycardia in adults. Heart rates above the resting rate may be normal ( ...

, and

hypotension Hypotension is low blood pressure. Blood pressure is the force of blood pushing against the walls of the arteries as the heart pumps out blood. Blood pressure is indicated by two numbers, the systolic blood pressure (the top number) and the dia ...

. In contrast to diabetic ketoacidosis, people with alcoholic ketoacidosis are usually alert and lucid despite the severity of the acidosis.

Causes

Alcoholic ketoacidosis is caused by complex physiology that is the result of prolonged and heavy alcohol intake, usually in the setting of poor nutrition. Chronic alcohol use can cause depleted hepatic glycogen stores and ethanol metabolism further impairs gluconeogenesis. This can reduce glucose availability and lead to hypoglycemia and increased reliance on fatty acid and ketone metabolism. An additional stressor such as vomiting or dehydration can cause an increase in counterregulatory hormones such as glucagon, cortisol and growth hormone which may further increase free fatty acid release and ketone production. Ethanol metabolism can also increase blood lactic acid levels which may also contribute to a metabolic acidosis.

Diagnosis

Diagnosis is generally based on symptoms. An elevated anion gap metabolic acidosis and ketosis is the classic present. However, a mixed acid-base disorder may be present especially if vomiting is contributing to a hypochloremic alkalosis. The ketone which is present is mostly beta-hydroxybutyrate rather than acetoacetate resulting in only a weakly positive nitroprusside test. People usually do not present with

high blood sugar Hyperglycemia is a condition in which an excessive amount of glucose circulates in the blood plasma. This is generally a blood sugar level higher than 11.1 mmol/L (200 mg/dL), but symptoms may not start to become noticeable until even ...

or sugar in the urine. This can cause false negative results when testing urine ketones as they only measure acetoacetate. Ethanol level are often low or negative despite a chronic alcohol use history. Electrolyte disturbances may include hypokalemia or hypomagnesemia may also be present.

Differential diagnosis

Other conditions that may present similarly include other causes of

such as

, toxic alcohol ingestion, and starvation ketosis. Toxic alcohol ingestion include methanol and

ethylene glycol poisoning Ethylene glycol poisoning is poisoning caused by drinking ethylene glycol. Early symptoms include intoxication, vomiting and abdominal pain. Later symptoms may include a decreased level of consciousness, headache, and seizures. Long term outcomes ...

Pancreatitis Pancreatitis is a condition characterized by inflammation of the pancreas. The pancreas is a large organ behind the stomach that produces digestive enzymes and a number of hormones. There are two main types: acute pancreatitis, and chronic pancr ...

alcoholic hepatitis Alcoholic hepatitis is hepatitis (inflammation of the liver) due to excessive intake of alcohol. Patients typically have a history of at least 10 years of heavy alcohol intake, typically 8-10 drinks per day. It is usually found in association with ...

, and

gastritis Gastritis is inflammation of the lining of the stomach. It may occur as a short episode or may be of a long duration. There may be no symptoms but, when symptoms are present, the most common is upper abdominal pain (see dyspepsia). Other possi ...

may also result in similar symptoms. The ratio of beta-hydroxybutryate to acetoacetate is usually higher in AKA (8:1) in contrast to diabetic ketoacidosis (3:1).

Management

Treatment includes administration of intravenous saline to rehydrate and 5% dextrose to turn off gluconeogenesis. Electrolyte imbalances, specifically hypokalaemia, should be corrected. Thiamine supplementation is often included to prevent

Wernicke encephalopathy Wernicke encephalopathy (WE), also Wernicke's encephalopathy, or wet brain is the presence of neurological symptoms caused by biochemical lesions of the central nervous system after exhaustion of B-vitamin reserves, in particular thiamine (vit ...

. Insulin is generally not used due to risk of hypoglycemia. Other potential causes of the symptoms should be ruled out.

Prognosis

Outcomes are generally favorable with treatment but up to 10% may develop cardiac arrest. It is proposed that alcoholic ketoacidosis is a significant cause of death among people with chronic alcoholism although the true prevalence is unknown. Estimation of prevalence and outcomes of this population is limited by difficulty in diagnosing the condition and the presence of multiple disorders at presentation.

History

In 1940, Edward S. Dillon, W. Wallace, and Leon S. Smelo, first described alcoholic ketoacidosis as a distinct

syndrome A syndrome is a set of medical signs and symptoms which are correlated with each other and often associated with a particular disease or disorder. The word derives from the Greek language, Greek σύνδρομον, meaning "concurrence". When a sy ...

. They stated that "because of the many and complex factors, both

physiologic Physiology (; ) is the scientific study of functions and mechanisms in a living system. As a sub-discipline of biology, physiology focuses on how organisms, organ systems, individual organs, cells, and biomolecules carry out the chemical ...

and pathologic, which influence the acid-base balance of the body, a multitude of processes may bring about the state of acidosis as an end result." In 1971, David W. Jenkins and colleagues described cases of three non‐diabetic people with a history of chronic heavy alcohol misuse and recurrent episodes of

ketoacidosis Ketoacidosis is a metabolic state caused by uncontrolled production of ketone bodies that cause a metabolic acidosis. While ketosis refers to any elevation of blood ketones, ketoacidosis is a specific pathologic condition that results in changes ...

. This group also proposed a possible underlying mechanism for this metabolic disturbance, naming it alcoholic ketoacidosis.

References

External links

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