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How Does Hyperglycemia Lead To Dka?

15l. Loriaux (ed.), Endocrine Emergencies: Recognition And Treatment, Contemporary Endocrinology 74, Doi 10.1007/978-1-62703-697-9_2, © Springer Science+business Media New York 2014

15l. Loriaux (ed.), Endocrine Emergencies: Recognition And Treatment, Contemporary Endocrinology 74, Doi 10.1007/978-1-62703-697-9_2, © Springer Science+business Media New York 2014

Précis 1. Clinical setting—Any altered state of well being in the context of signifi cant hyperglycemia in a patient with type 1 (DKA) or advanced type 2 diabetes mel- litus (DKA or HHS), particularly during acute illness, may signify one of these diabetic emergencies. 2. Diagnosis (a) History: Most patients with diabetic ketoacidosis (DKA) or with hyperos- molar hyperglycemic state (HHS) will have a history of diabetes, and a his- tory of altered insulin dose, infection, signifi cant medical “stressâ€. Antecedent symptoms of polyuria and polydipsia, lassitude, blurred vision, and mental status changes may predominate the clinical picture. With DKA, abdominal pain and tachypnea are often present. (b) Physical examination usually reveals an altered sensorium, signs of volume contraction/dehydration (tachycardia, hypotension, dry mucus membranes, “tenting†of the skin); in DKA, the odor of acetone in the breath. (c) Laboratory evaluation. The diagnostic criteria for DKA include blood glu- cose above 250 mg/dL, arterial pH < 7.30, serum bicarbonate < 15 mEq/l Chapter 2 Diabetic Ketoacidosis and Hyperosmolar Hyperglycemic Syndrome Beatrice C. Lupsa and Silvio E. Inzucchi B. C. Lupsa , M.D. (*) • S. E. Inzucchi , M.D. Section of Endocrinology , Yale University School of Medicine , Yale-New Haven Hospital, 333 Cedar Street, FMP 107 , P.O. Box 208020 , New Haven , CT 06520 , USA e-mail: [email protected] 16 and moderate degree of ketonemia and/or ketonuria. Patients with HHS present with extreme hyperglycemia (blood glucose > 600 mg/dL), increased osmolality (> 320 mOsm/kg) and profound dehydration/volume contrac- tion. The laboratory evaluation of a patient with hyperglycemic emergency should include measurement of blood glucose and he Continue reading >>

Hyperglycemic Crises

Hyperglycemic Crises

What They Are and How to Avoid Them One type results in about 100,000 hospitalizations a year with a mortality rate of under 5%. The other is thought to cause fewer hospitalizations, yet the mortality rate is about 15%. Severe hyperglycemic conditions, known as diabetic ketoacidosis (DKA) and hyperosmolar hyperglycemic state (HHS), involve very serious imbalances in blood chemistry and usually require that a person be hospitalized until normal blood chemistry is restored. Because they can occur in anyone with diabetes, everyone should know what causes them, how to prevent them, how they are treated, and when to seek medical attention. The body in balance Glucose metabolism is a complex balancing act. In people who don’t have diabetes, a number of interconnected processes help the body to use glucose and keep blood glucose levels in the normal range. The body constantly balances glucose extracted from foods and produced by the liver with glucose utilization by the body’s tissues. When there is ample glucose in the bloodstream, the liver converts some of it into glycogen for storage. When the body needs more energy, such as during a prolonged period of fasting or activity, the liver converts stored glycogen back into glucose so that it can be used by the body’s tissues. The liver also can create glucose from amino acids and fats. Insulin lowers blood glucose levels both by slowing down the liver’s glucose production and by helping the body’s tissues to use glucose for energy. If the blood glucose level goes too low, other hormones, called counterregulatory hormones, work against the action of insulin to raise blood glucose levels. These hormones include glucagon, epinephrine, growth hormone, and cortisol. All work by prodding the liver to release glucose and by Continue reading >>

Diabetic Ketoacidosis (dka)

Diabetic Ketoacidosis (dka)

Diabetic ketoacidosis is an acute metabolic complication of diabetes characterized by hyperglycemia, hyperketonemia, and metabolic acidosis. Hyperglycemia causes an osmotic diuresis with significant fluid and electrolyte loss. DKA occurs mostly in type 1 diabetes mellitus (DM). It causes nausea, vomiting, and abdominal pain and can progress to cerebral edema, coma, and death. DKA is diagnosed by detection of hyperketonemia and anion gap metabolic acidosis in the presence of hyperglycemia. Treatment involves volume expansion, insulin replacement, and prevention of hypokalemia. Diabetic ketoacidosis (DKA) is most common among patients with type 1 diabetes mellitus and develops when insulin levels are insufficient to meet the body’s basic metabolic requirements. DKA is the first manifestation of type 1 DM in a minority of patients. Insulin deficiency can be absolute (eg, during lapses in the administration of exogenous insulin) or relative (eg, when usual insulin doses do not meet metabolic needs during physiologic stress). Common physiologic stresses that can trigger DKA include Some drugs implicated in causing DKA include DKA is less common in type 2 diabetes mellitus, but it may occur in situations of unusual physiologic stress. Ketosis-prone type 2 diabetes is a variant of type 2 diabetes, which is sometimes seen in obese individuals, often of African (including African-American or Afro-Caribbean) origin. People with ketosis-prone diabetes (also referred to as Flatbush diabetes) can have significant impairment of beta cell function with hyperglycemia, and are therefore more likely to develop DKA in the setting of significant hyperglycemia. SGLT-2 inhibitors have been implicated in causing DKA in both type 1 and type 2 DM. Continue reading >>

What Is The Difference Between Hyperglycemia And Hypoglycemia?

What Is The Difference Between Hyperglycemia And Hypoglycemia?

By Debra A. Sokol-McKay, MS, CVRT, CDE, CLVT, OTR/L, SCLV What Is Hyperglycemia? In relation to diabetes, hyperglycemia refers to chronically high blood glucose levels. Most medical professionals define hyperglycemia by using the blood glucose goals that you and your physician have established and combining those goals with the blood glucose target ranges set by the American Diabetes Association. It's important to understand that you'll probably experience high blood glucose levels from time to time, despite your best efforts at control. As with any chronic disease, talk with your physician and diabetes care team if the pattern of your blood glucose readings is consistently higher or lower than your blood glucose goals. Complications from Hyperglycemia Persistent hyperglycemia can cause a wide range of chronic complications that affect almost every system in your body. When large blood vessels are affected, it can lead to: Stroke (cerebral vascular disease) Heart attack or Congestive Heart Failure (coronary heart disease) Circulation disorders and possible amputation (peripheral vascular disease) When smaller blood vessels are affected, it can lead to: Kidney disease (nephropathy) Nerve damage (neuropathy) Diabetic eye disease (retinopathy) Joseph Monks: Writer, Producer, and Film Director Joseph Monks, who has diabetic retinopathy, creates and produces films for his production company Sight Unseen Pictures. He is also the first blind filmmaker to direct a feature film. Says Joe, "I'm not uncomfortable with the term 'blind.' I'm not thrilled about it, of course, but it's accurate. The lights went out for me in early 2002 as a result of diabetic retinopathy—the death of my retinas. It is what it is, so when it happened, I decided that I wasn't going to let it put an en Continue reading >>

Diabetic Ketoacidosis

Diabetic Ketoacidosis

As fat is broken down, acids called ketones build up in the blood and urine. In high levels, ketones are poisonous. This condition is known as ketoacidosis. Diabetic ketoacidosis (DKA) is sometimes the first sign of type 1 diabetes in people who have not yet been diagnosed. It can also occur in someone who has already been diagnosed with type 1 diabetes. Infection, injury, a serious illness, missing doses of insulin shots, or surgery can lead to DKA in people with type 1 diabetes. People with type 2 diabetes can also develop DKA, but it is less common. It is usually triggered by uncontrolled blood sugar, missing doses of medicines, or a severe illness. Continue reading >>

Hyperglycemia - Symptoms, Causes And Treatments

Hyperglycemia - Symptoms, Causes And Treatments

Hyperglycemia is a term referring to high blood glucose levels - the condition that often leads to a diagnosis of diabetes. High blood glucose levels are the defining feature of diabetes, but once the disease is diagnosed, hyperglycemia is a signal of poor control over the condition. Hyperglycemia is defined by certain high levels of blood glucose:1 Fasting levels greater than 7.0 mmol/L (126 mg/dL) Two-hours postprandial (after a meal) levels greater than 11.0 mmol/L (200 mg/dL). Chronic hyperglycemia usually leads to the development of diabetic complications.2 Symptoms of hyperglycemia The most common symptoms of diabetes itself are related to hyperglycemia - the classic symptoms of frequent urination and thirst.2,3 Typical signs and symptoms of hyperglycemia that has been confirmed by blood glucose measurement include:1,3,4 Thirst and hunger Dry mouth Frequent urination, particularly at night Tiredness Recurrent infections, such as thrush Weight loss Vision blurring. Causes of hyperglycemia Hyperglycemia often leads to the diagnosis of diabetes. For people already diagnosed and treated for diabetes, however, poor control over blood sugar levels leads to the condition. Causes of this include:1,3,4 Eating more or exercising less than usual Insufficient amount of insulin treatment (more commonly in cases of type 1 diabetes) Insulin resistance in type 2 diabetes Illness such as the flu Psychological and emotional stress The "dawn phenomenon" or "dawn effect" - an early morning hormone surge. The video below from Diabetes UK explains the dawn phenomenon and offers practical tips. Treatment and prevention of hyperglycemia Prevention of hyperglycemia for people with a diabetes diagnosis is a matter of good self-monitoring and management of blood glucose levels, including ad Continue reading >>

> Hyperglycemia And Diabetic Ketoacidosis

> Hyperglycemia And Diabetic Ketoacidosis

When blood glucose levels (also called blood sugar levels) are too high, it's called hyperglycemia. Glucose is a sugar that comes from foods, and is formed and stored inside the body. It's the main source of energy for the body's cells and is carried to each through the bloodstream. But even though we need glucose for energy, too much glucose in the blood can be unhealthy. Hyperglycemia is the hallmark of diabetes — it happens when the body either can't make insulin (type 1 diabetes) or can't respond to insulin properly (type 2 diabetes). The body needs insulin so glucose in the blood can enter the cells to be used for energy. In people who have developed diabetes, glucose builds up in the blood, resulting in hyperglycemia. If it's not treated, hyperglycemia can cause serious health problems. Too much sugar in the bloodstream for long periods of time can damage the vessels that supply blood to vital organs. And, too much sugar in the bloodstream can cause other types of damage to body tissues, which can increase the risk of heart disease and stroke, kidney disease, vision problems, and nerve problems in people with diabetes. These problems don't usually show up in kids or teens with diabetes who have had the disease for only a few years. However, they can happen in adulthood in some people, particularly if they haven't managed or controlled their diabetes properly. Blood sugar levels are considered high when they're above someone's target range. The diabetes health care team will let you know what your child's target blood sugar levels are, which will vary based on factors like your child's age. A major goal in controlling diabetes is to keep blood sugar levels as close to the desired range as possible. It's a three-way balancing act of: diabetes medicines (such as in Continue reading >>

Acute Complications Of Diabetes - Diabetic Ketoacidosis

Acute Complications Of Diabetes - Diabetic Ketoacidosis

- [Voiceover] Oftentimes we think of diabetes mellitus as a chronic disease that causes serious complications over a long period of time if it's not treated properly. However, the acute complications of diabetes mellitus are often the most serious, and can be potentially even life threatening. Let's discuss one of the acute complications of diabetes, known as diabetic ketoacidosis, or DKA for short, which can occur in individuals with type 1 diabetes. Now recall that type 1 diabetes is an autoimmune disorder. And as such, there's an autoimmune destruction of the beta cells in the pancreas, which prevents the pancreas from producing and secreting insulin. Therefore, there is an absolute insulin deficiency in type 1 diabetes. But what exactly does this mean for the body? To get a better understanding, let's think about insulin requirements as a balancing act with energy needs. Now the goal here is to keep the balance in balance. As the energy requirements of the body go up, insulin is needed to take the glucose out of the blood and store it throughout the body. Normally in individuals without type 1 diabetes, the pancreas is able to produce enough insulin to keep up with any amount of energy requirement. But how does this change is someone has type 1 diabetes? Well since their pancreas cannot produces as much insulin, they have an absolute insulin deficiency. Now for day-to-day activities, this may not actually cause any problems, because the small amount of insulin that is produced is able to compensate and keep the balance in balance. However, over time, as type 1 diabetes worsens, and less insulin is able to be produced, then the balance becomes slightly unequal. And this results in the sub-acute or mild symptoms of type 1 diabetes such as fatigue, because the body isn Continue reading >>

Hyperglycemia And What To Do About It

Hyperglycemia And What To Do About It

This CE activity is approved by EMS World Magazine, an organization accredited by the Continuing Education Coordinating Board for Emergency Medical Services (CECBEMS) for 1 CEU. To take the CE test that accompanies this article, go to www.rapidce.com to take the test and immediately receive your CE credit. Questions? E-mail [email protected] Both hypoglycemia and hyperglycemia are true medical emergencies. As we discussed last month, hypoglycemia often has a rapid onset and can impact any patient whose body is not provided an adequate glucose supply. While anyone can experience hypoglycemia, it is most common in patients who have been diagnosed with diabetes and whose natural insulin does not function normally. Patients with diabetes also risk developing hyperglycemia, a complex and dangerous metabolic derangement that can be fatal without proper care. The American Diabetes Association says that in 2011 there were a staggering 25 million patients with diabetes and 79 million with pre-diabetes across the United States. This month’s CE article explores the consequences of hyperglycemia on the body and the life-threatening emergencies it can cause. Diabetic Disease Progression Recall that insulin secretion is stimulated by eating. Insulin secretion is not stimulated between meals, and a decline in the body’s blood glucose levels inhibits the pancreatic islets’ insulin secretion and stimulates the secretion of glucagon, which allows glucose levels to remain in a normal range. Figure 1 demonstrates the relationship between blood glucose levels and the pancreas. With the exception of very few organs, such as the brain and the kidneys, the body’s tissues require insulin for glucose to pass through the cell walls. For patients with diabetes mellitus (DM), either thei Continue reading >>

Diabetic Ketoacidosis

Diabetic Ketoacidosis

Diabetes mellitus is the name given to a group of conditions whose common hallmark is a raised blood glucose concentration (hyperglycemia) due to an absolute or relative deficiency of the pancreatic hormone insulin. In the UK there are 1.4 million registered diabetic patients, approximately 3 % of the population. In addition, an estimated 1 million remain undiagnosed. It is a growing health problem: In 1998, the World Health Organization (WHO) predicted a doubling of the worldwide prevalence of diabetes from 150 million to 300 million by 2025. For a very tiny minority, diabetes is a secondary feature of primary endocrine disease such as acromegaly (growth hormone excess) or Cushing’s syndrome (excess corticosteroid), and for these patients successful treatment of the primary disease cures diabetes. Most diabetic patients, however, are classified as suffering either type 1 or type 2 diabetes. Type 1 diabetes Type 1 diabetes, which accounts for around 15 % of the total diabetic population, is an autoimmune disease of the pancreas in which the insulin-producing β-cells of the pancreas are selectively destroyed, resulting in an absolute insulin deficiency. The condition arises in genetically susceptible individuals exposed to undefined environmental insult(s) (possibly viral infection) early in life. It usually becomes clinically evident and therefore diagnosed during late childhood, with peak incidence between 11 and 13 years of age, although the autoimmune-mediated β-cell destruction begins many years earlier. There is currently no cure and type 1 diabetics have an absolute life-long requirement for daily insulin injections to survive. Type 2 diabetes This is the most common form of diabetes: around 85 % of the diabetic population has type 2 diabetes. The primary prob Continue reading >>

Diabetic Ketoacidosis And Hyperglycemic Hyperosmolar Syndrome

Diabetic Ketoacidosis And Hyperglycemic Hyperosmolar Syndrome

In Brief Diabetic ketoacidosis (DKA) and hyperosmolar hyperglycemic syndrome (HHS) are two acute complications of diabetes that can result in increased morbidity and mortality if not efficiently and effectively treated. Mortality rates are 2–5% for DKA and 15% for HHS, and mortality is usually a consequence of the underlying precipitating cause(s) rather than a result of the metabolic changes of hyperglycemia. Effective standardized treatment protocols, as well as prompt identification and treatment of the precipitating cause, are important factors affecting outcome. The two most common life-threatening complications of diabetes mellitus include diabetic ketoacidosis (DKA) and hyperglycemic hyperosmolar syndrome (HHS). Although there are important differences in their pathogenesis, the basic underlying mechanism for both disorders is a reduction in the net effective concentration of circulating insulin coupled with a concomitant elevation of counterregulatory hormones (glucagon, catecholamines, cortisol, and growth hormone). These hyperglycemic emergencies continue to be important causes of morbidity and mortality among patients with diabetes. DKA is reported to be responsible for more than 100,000 hospital admissions per year in the United States1 and accounts for 4–9% of all hospital discharge summaries among patients with diabetes.1 The incidence of HHS is lower than DKA and accounts for <1% of all primary diabetic admissions.1 Most patients with DKA have type 1 diabetes; however, patients with type 2 diabetes are also at risk during the catabolic stress of acute illness.2 Contrary to popular belief, DKA is more common in adults than in children.1 In community-based studies, more than 40% of African-American patients with DKA were >40 years of age and more than 2 Continue reading >>

Understanding And Treating Diabetic Ketoacidosis

Understanding And Treating Diabetic Ketoacidosis

Diabetic ketoacidosis (DKA) is a serious metabolic disorder that can occur in animals with diabetes mellitus (DM).1,2 Veterinary technicians play an integral role in managing and treating patients with this life-threatening condition. In addition to recognizing the clinical signs of this disorder and evaluating the patient's response to therapy, technicians should understand how this disorder occurs. DM is caused by a relative or absolute lack of insulin production by the pancreatic b-cells or by inactivity or loss of insulin receptors, which are usually found on membranes of skeletal muscle, fat, and liver cells.1,3 In dogs and cats, DM is classified as either insulin-dependent (the body is unable to produce sufficient insulin) or non-insulin-dependent (the body produces insulin, but the tissues in the body are resistant to the insulin).4 Most dogs and cats that develop DKA have an insulin deficiency. Insulin has many functions, including the enhancement of glucose uptake by the cells for energy.1 Without insulin, the cells cannot access glucose, thereby causing them to undergo starvation.2 The unused glucose remains in the circulation, resulting in hyperglycemia. To provide cells with an alternative energy source, the body breaks down adipocytes, releasing free fatty acids (FFAs) into the bloodstream. The liver subsequently converts FFAs to triglycerides and ketone bodies. These ketone bodies (i.e., acetone, acetoacetic acid, b-hydroxybutyric acid) can be used as energy by the tissues when there is a lack of glucose or nutritional intake.1,2 The breakdown of fat, combined with the body's inability to use glucose, causes many pets with diabetes to present with weight loss, despite having a ravenous appetite. If diabetes is undiagnosed or uncontrolled, a series of metab Continue reading >>

Hyperglycemic Crises In Adult Patients With Diabetes

Hyperglycemic Crises In Adult Patients With Diabetes

Go to: PATHOGENESIS The events leading to hyperglycemia and ketoacidosis are depicted in Fig. 1 (13). In DKA, reduced effective insulin concentrations and increased concentrations of counterregulatory hormones (catecholamines, cortisol, glucagon, and growth hormone) lead to hyperglycemia and ketosis. Hyperglycemia develops as a result of three processes: increased gluconeogenesis, accelerated glycogenolysis, and impaired glucose utilization by peripheral tissues (12–17). This is magnified by transient insulin resistance due to the hormone imbalance itself as well as the elevated free fatty acid concentrations (4,18). The combination of insulin deficiency and increased counterregulatory hormones in DKA also leads to the release of free fatty acids into the circulation from adipose tissue (lipolysis) and to unrestrained hepatic fatty acid oxidation in the liver to ketone bodies (β-hydroxybutyrate and acetoacetate) (19), with resulting ketonemia and metabolic acidosis. Increasing evidence indicates that the hyperglycemia in patients with hyperglycemic crises is associated with a severe inflammatory state characterized by an elevation of proinflammatory cytokines (tumor necrosis factor-α and interleukin-β, -6, and -8), C-reactive protein, reactive oxygen species, and lipid peroxidation, as well as cardiovascular risk factors, plasminogen activator inhibitor-1 and free fatty acids in the absence of obvious infection or cardiovascular pathology (20). All of these parameters return to near-normal values with insulin therapy and hydration within 24 h. The procoagulant and inflammatory states may be due to nonspecific phenomena of stress and may partially explain the association of hyperglycemic crises with a hypercoagulable state (21). The pathogenesis of HHS is not as wel Continue reading >>

Diabetic Ketoacidosis (dka)

Diabetic Ketoacidosis (dka)

Diabetic Ketoacidosis (DKA) Diabetic ketoacidosis (DKA) occurs when the body does not have enough insulin. Insulin is what breaks down sugar into energy. When insulin is not present to break down sugars, our body begins to break down fat. Fat break down produces ketones which spill into the urine and cause glucose build up in the blood, thus acidifying the body. Because sugar is not entering into our body’s cells for energy breakdown, the sugar is being processed by the kidneys and excreted through the urine; as a result, we become dehydrated and our blood becomes even more acidic. This leads to sickness and hospitalization if not treated. If a person’s blood sugar is over 240, they should start checking their blood for ketones. If you have diabetes, or love someone who does, being aware of warning signs of diabetic ketoacidosis (DKA) can help save a life. Early Symptoms of DKA: High blood glucose level, usually > 300 High volume to ketones present in blood or urine Frequent urination or thirst that lasts for a day or more Dry skin and mouth Rapid shallow breathing Abdominal pain (especially in children) Muscle stiffness or aches Flushed face As DKA Worsens: Decreases alertness, confusion – brain is dehydrating Deep, labored, and gasping breathing Headache Breath that smells fruity or like fingernail polish remover Nausea and/or vomiting Abdomen may be tender and hurt if touched Decreased consciousness, coma, death If you think you might have DKA, test for ketones. If ketones are present, call your health care provider right away. To treat high blood sugar, hydrate with water or sugar free, caffeine free drinks. Sugar free popsicles and snacks are also good alternatives. Always call the doctor if vomiting goes on for more than two hours. Symptoms can go from mild Continue reading >>

Diabetic Ketoacidosis - Symptoms

Diabetic Ketoacidosis - Symptoms

A A A Diabetic Ketoacidosis Diabetic ketoacidosis (DKA) results from dehydration during a state of relative insulin deficiency, associated with high blood levels of sugar level and organic acids called ketones. Diabetic ketoacidosis is associated with significant disturbances of the body's chemistry, which resolve with proper therapy. Diabetic ketoacidosis usually occurs in people with type 1 (juvenile) diabetes mellitus (T1DM), but diabetic ketoacidosis can develop in any person with diabetes. Since type 1 diabetes typically starts before age 25 years, diabetic ketoacidosis is most common in this age group, but it may occur at any age. Males and females are equally affected. Diabetic ketoacidosis occurs when a person with diabetes becomes dehydrated. As the body produces a stress response, hormones (unopposed by insulin due to the insulin deficiency) begin to break down muscle, fat, and liver cells into glucose (sugar) and fatty acids for use as fuel. These hormones include glucagon, growth hormone, and adrenaline. These fatty acids are converted to ketones by a process called oxidation. The body consumes its own muscle, fat, and liver cells for fuel. In diabetic ketoacidosis, the body shifts from its normal fed metabolism (using carbohydrates for fuel) to a fasting state (using fat for fuel). The resulting increase in blood sugar occurs, because insulin is unavailable to transport sugar into cells for future use. As blood sugar levels rise, the kidneys cannot retain the extra sugar, which is dumped into the urine, thereby increasing urination and causing dehydration. Commonly, about 10% of total body fluids are lost as the patient slips into diabetic ketoacidosis. Significant loss of potassium and other salts in the excessive urination is also common. The most common Continue reading >>

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