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Effects Of Lactic Acidosis

Lactic Acidosis

Lactic Acidosis

The buildup of lactic acid in the bloodstream. This medical emergency most commonly results from oxygen deprivation in the body’s tissues, impaired liver function, respiratory failure, or cardiovascular disease. It can also be caused by a class of oral diabetes drugs called biguanides, which includes metformin (brand name Glucophage). Another biguanide called phenformin was pulled from the market in the United States in 1977 because of an unacceptably high rate of lactic acidosis associated with its use. Concerns about lactic acidosis also delayed the introduction of metformin to the U.S. market until 1995, despite the fact that it had been widely used for years in other countries. There have been reports of lactic acidosis occurring in people taking metformin, and the U.S. Food and Drug Administration estimates that lactic acidosis occurs in 5 out of every 100,000 people who use metformin for any length of time. However, this risk is much lower than it was in people taking phenformin, and it is not clear whether the episodes of lactic acidosis associated with metformin have actually been due to metformin use. In fact, the lactic acidosis could have been explained by the person’s diabetes and related medical conditions. Nonetheless, diabetes experts recommend that metformin not be used in people with congestive heart failure, kidney disease, or liver disease. They also recommend that it be discontinued (at least temporarily) in people undergoing certain medical imaging tests called contrast studies. Symptoms of lactic acidosis include feeling very weak or tired or having unusual muscle pain or unusual stomach discomfort. Continue reading >>

Hemodynamic Consequences Of Severe Lactic Acidosis In Shock States: From Bench To Bedside

Hemodynamic Consequences Of Severe Lactic Acidosis In Shock States: From Bench To Bedside

Hemodynamic consequences of severe lactic acidosis in shock states: from bench to bedside Antoine Kimmoun , Emmanuel Novy , Thomas Auchet , Nicolas Ducrocq , and Bruno Levy CHU Nancy, Service de Ranimation Mdicale Brabois, Pole Cardiovasculaire et Ranimation Mdicale, Hpital de Brabois, Vandoeuvre-les-Nancy, 54511 France Universit de Lorraine, Nancy, 54000 France INSERM U1116, Groupe Choc, Facult de Mdecine, Vandoeuvre-les-Nancy, 54511 France CHU Nancy, Service de Ranimation Mdicale Brabois, Pole Cardiovasculaire et Ranimation Mdicale, Hpital de Brabois, Vandoeuvre-les-Nancy, 54511 France Universit de Lorraine, Nancy, 54000 France CHU Nancy, Service de Ranimation Mdicale Brabois, Pole Cardiovasculaire et Ranimation Mdicale, Hpital de Brabois, Vandoeuvre-les-Nancy, 54511 France CHU Nancy, Service de Ranimation Mdicale Brabois, Pole Cardiovasculaire et Ranimation Mdicale, Hpital de Brabois, Vandoeuvre-les-Nancy, 54511 France CHU Nancy, Service de Ranimation Mdicale Brabois, Pole Cardiovasculaire et Ranimation Mdicale, Hpital de Brabois, Vandoeuvre-les-Nancy, 54511 France Universit de Lorraine, Nancy, 54000 France INSERM U1116, Groupe Choc, Facult de Mdecine, Vandoeuvre-les-Nancy, 54511 France CHU Nancy, Service de Ranimation Mdicale Brabois, Pole Cardiovasculaire et Ranimation Mdicale, Hpital de Brabois, Vandoeuvre-les-Nancy, 54511 France Universit de Lorraine, Nancy, 54000 France INSERM U1116, Groupe Choc, Facult de Mdecine, Vandoeuvre-les-Nancy, 54511 France Antoine Kimmoun, Email: [email protected] . Author information Copyright and License information Disclaimer Copyright Kimmoun et al.; licensee BioMed Central. 2015 This is an Open Access article distributed under the terms of the Creative Commons Attribution License ( ), which permits unrestricted use, distribution Continue reading >>

Lactic Acidosis Clinical Presentation: History, Physical Examination

Lactic Acidosis Clinical Presentation: History, Physical Examination

Author: Kyle J Gunnerson, MD; Chief Editor: Michael R Pinsky, MD, CM, Dr(HC), FCCP, MCCM more... The onset of acidosis may be rapid (ie, within minutes to hours) or progressive (ie, over a period of several days). Lactic acidosis frequently occurs during strenuous exercise in healthy people, bearing no consequence. However, development of lactic acidosis in disease states is ominous, often indicating a critical illness of recent onset. Therefore, a careful history should be obtained to evaluate the underlying pathophysiologic cause of shock that contributed to lactic acidosis. Furthermore, a detailed history of ingestion of various prescription drugs or toxins from the patient or a collateral history from the patient's family should be obtained. The clinical signs and symptoms associated with lactic acidosis are highly dependent on the underlying etiology. No distinctive features are specific for hyperlactatemia. Lactate acidosis is present in patients who are critically ill from hypovolemic, septic, or cardiogenic shock. Lactate acidosis always should be suspected in the presence of elevated anion gap metabolic acidosis. Lactic acidosis is a serious complication of antiretroviral therapy. A history of antiretroviral treatment should be obtained. Children who have a relatively mild form of congenital lactic acidosis may develop firmament metabolic acidosis during an acute illness such as respiratory infection. These patients have a deficiency in the activity of pyruvate dehydrogenase, and the stress-induced increases in the glycolytic rate may result in severe metabolic acidosis. D-lactic acidosis, a unique form of lactic acidosis, can occur in patients with jejunoileal bypass or small bowel resection causing short bowel syndrome. In these settings, the glucose and car Continue reading >>

Lactic Acidosis

Lactic Acidosis

Lactic acidosis is a medical condition characterized by the buildup of lactate (especially L-lactate) in the body, which results in an excessively low pH in the bloodstream. It is a form of metabolic acidosis, in which excessive acid accumulates due to a problem with the body's metabolism of lactic acid. Lactic acidosis is typically the result of an underlying acute or chronic medical condition, medication, or poisoning. The symptoms are generally attributable to these underlying causes, but may include nausea, vomiting, rapid deep breathing, and generalised weakness. The diagnosis is made on biochemical analysis of blood (often initially on arterial blood gas samples), and once confirmed, generally prompts an investigation to establish the underlying cause to treat the acidosis. In some situations, hemofiltration (purification of the blood) is temporarily required. In rare chronic forms of lactic acidosis caused by mitochondrial disease, a specific diet or dichloroacetate may be used. The prognosis of lactic acidosis depends largely on the underlying cause; in some situations (such as severe infections), it indicates an increased risk of death. Classification[edit] The Cohen-Woods classification categorizes causes of lactic acidosis as:[1] Type A: Decreased tissue oxygenation (e.g., from decreased blood flow) Type B B1: Underlying diseases (sometimes causing type A) B2: Medication or intoxication B3: Inborn error of metabolism Signs and symptoms[edit] Lactic acidosis is commonly found in people who are unwell, such as those with severe heart and/or lung disease, a severe infection with sepsis, the systemic inflammatory response syndrome due to another cause, severe physical trauma, or severe depletion of body fluids.[2] Symptoms in humans include all those of typical m Continue reading >>

Lactic Acidosis: Background, Etiology, Epidemiology

Lactic Acidosis: Background, Etiology, Epidemiology

Author: Kyle J Gunnerson, MD; Chief Editor: Michael R Pinsky, MD, CM, Dr(HC), FCCP, MCCM more... In basic terms, lactic acid is the normal endpoint of the anaerobic breakdown of glucose in the tissues. The lactate exits the cells and is transported to the liver, where it is oxidized back to pyruvate and ultimately converted to glucose via the Cori cycle. In the setting of decreased tissue oxygenation, lactic acid is produced as the anaerobic cycle is utilized for energy production. With a persistent oxygen debt and overwhelming of the body's buffering abilities (whether from chronic dysfunction or excessive production), lactic acidosis ensues. [ 1 , 2 ] (See Etiology.) Lactic acid exists in 2 optical isomeric forms, L-lactate and D-lactate. L-lactate is the most commonly measured level, as it is the only form produced in human metabolism. Its excess represents increased anaerobic metabolism due to tissue hypoperfusion. (See Workup.) D-lactate is a byproduct of bacterial metabolism and may accumulate in patients with short-gut syndrome or in those with a history of gastric bypass or small-bowel resection. [ 3 ] By the turn of the 20th century, many physicians recognized that patients who are critically ill could exhibit metabolic acidosis unaccompanied by elevation of ketones or other measurable anions. In 1925, Clausen identified the accumulation of lactic acid in blood as a cause of acid-base disorder. Several decades later, Huckabee's seminal work firmly established that lactic acidosis frequently accompanies severe illnesses and that tissue hypoperfusion underlies the pathogenesis. In their classic 1976 monograph, Cohen and Woods classified the causes of lactic acidosis according to the presence or absence of adequate tissue oxygenation. (See Presentationand Differe Continue reading >>

A Side Effect You Should Know About

A Side Effect You Should Know About

The glucose-lowering medication metformin (Glucophage) could cause lactic acidosis if your kidneys and liver are not working efficiently. Lactic acidosis is when high levels build up in the blood of a substance called lactic acid — a chemical that is normally produced by your body in small amounts and removed by your liver and kidneys. The risk of lactic acidosis goes up if you: have heart failure or a lung ailment have kidney or liver problems drink alcohol heavily In these cases, you might not be able to take metformin. If you don't have one of these problems, you are at a very low risk for developing lactic acidosis from metformin. You should, however, contact your doctor immediately if you suddenly develop any of these symptoms of lactic acidosis: diarrhea fast and shallow breathing muscle pain or cramping weakness tiredness or unusual sleepiness You should also let your doctor know if you get the flu or any illness that results in severe vomiting, diarrhea, and/or fever, or if your intake of fluids becomes significantly reduced. Severe dehydration can affect your kidney or liver function and increase your risk of lactic acidosis from metformin. Continue reading >>

Acute Lactic Acidosis

Acute Lactic Acidosis

Author: Bret A Nicks, MD, MHA; Chief Editor: Romesh Khardori, MD, PhD, FACP more... Metabolic acidosis is defined as a state of decreased systemic pH resulting from either a primary increase in hydrogen ion (H+) or a reduction in bicarbonate (HCO3-) concentrations. In the acute state, respiratory compensation of acidosis occurs by hyperventilation resulting in a relative reduction in PaCO2. Chronically, renal compensation occurs by means of reabsorption of HCO3. [ 1 , 2 ] Acidosis arises from an increased production of acids, a loss of alkali, or a decreased renal excretion of acids. The underlying etiology of metabolic acidosis is classically categorized into those that cause an elevated anion gap (AG) (see the Anion Gap calculator) and those that do not. Lactic acidosis, identified by a state of acidosis and an elevated plasma lactate concentration is one type of anion gap metabolic acidosis and may result from numerous conditions. [ 2 , 3 , 4 ] It remains the most common cause of metabolic acidosis in hospitalized patients. The normal blood lactate concentration in unstressed patients is0.5-1 mmol/L. Patients with critical illness can be considered to have normal lactate concentrations of less than 2 mmol/L. Hyperlactatemia is defined as a mild to moderate persistent increase in blood lactate concentration (2-4 mmol/L) without metabolic acidosis, whereas lactic acidosis is characterized by persistently increased blood lactate levels (usually >4-5 mmol/L) in association with metabolic acidosis. [ 1 , 5 ] Elevated lactate levels, while typically thought of as a marker of inadequate tissue perfusion with concurrent shift toward increased anaerobic metabolism, can be present in patients in whom systemic hypoperfusion is not present and therefore should be considered wit Continue reading >>

Type B Lactic Acidosis: A Rare But Life Threatening Hematologic Emergency. A Case Illustration And Brief Review

Type B Lactic Acidosis: A Rare But Life Threatening Hematologic Emergency. A Case Illustration And Brief Review

Type B lactic acidosis: a rare but life threatening hematologic emergency. A case illustration and brief review Wederson M Claudino ,* Ajoy Dias ,* William Tse ,* and Vivek R Sharma * Division of Hematology and Medical Oncology, James Graham Brown Cancer Center, University of Louisville Health Sciences Center, Louisville, Kentucky, USA Address correspondence to: Dr. Vivek R Sharma, Division of Hematology and Medical Oncology, James Graham Brown Cancer Center, 529 South Jackson Street, Louisville, Kentucky 40202, USA. E-mail: [email protected] Major strides have been made in improving the treatment of medical emergencies associated with malignancies. Nonetheless, metabolic emergencies in cancer patients can often times be life-threatening. Type B lactic acidosis is a rare but potentially fatal paraneoplastic phenomenon that has been described in association with hematologic and solid malignancies and portends a poor prognosis if not rapidly recognized and treated. It is believed that this occurs as a result of cancer cells switching their glucose metabolism from an oxidative oxygen- dependent pathway towards a glycolytic phenotype, also known as the Warburg effect. Though rare, it is important to consider this entity in the differential diagnosis of type B lactic acidosis since prompt identification and treatment may help improve outcomes in this otherwise fatal process. We present a case of type B lactic acidosis in a patient with chronic lymphocytic leukemia along with a brief review of the literature. Keywords: Lactic acidosis, malignancy, hematologic emergency Otto Warburg was a German physiologist awarded a Nobel Prize in 1931 for his pioneering work with respiratory enzymes [ 1 ]. Later on, his continued investigations led to the discovery that canc Continue reading >>

Lactic Acidosis - An Overview | Sciencedirect Topics

Lactic Acidosis - An Overview | Sciencedirect Topics

Lactic acidosis is a rare complication of malignancy and is seen in patients who have cancer with a high proliferative rate such as lymphoma, leukemia, and small cell carcinoma. Generoso G. Gascon, ... Bruce Cohen, in Textbook of Clinical Neurology (Third Edition) , 2007 Primary lactic acidosis of the neonate usually ends in death within months. In an occasional infant, the lactic acidosis becomes less severe, and the infant will develop nearly normally until adolescence, when neurodegeneration may be observed. If definite nuclear gene mutations are identified in the future in patients with primary lactic acidosis, prenatal diagnosis using chorionic villus sampling or amniocentesis should be feasible. The prognosis of the other congenital lactic acidoses depends on the underlying biochemical defectsbest with biotinidase deficiency and the gluconeogenic defects, less with PDH, PC, and Krebs' cycle defects. Ian W. Seetho, John P.H. Wilding, in Clinical Biochemistry: Metabolic and Clinical Aspects (Third Edition) , 2014 Lactic acidosis is a rare but serious complication that can occur whilst taking metformin. Lactic acidosis was more frequently reported with phenformin, another biguanide that was subsequently withdrawn in most countries in 1977 after 306 documented cases. While phenformin excretion relies upon hepatic hydroxylation (pharmacogenetically deficient in approximately 10% of Caucasians), metformin is subject to renal tubular secretion, and its excretion depends only on renal function. Lactic acidosis presents with non-specific symptoms such as lethargy, nausea, vomiting, altered level of consciousness and abdominal pain. Biochemical features of lactic acidosis are those of an elevated anion gap metabolic acidosis with high blood lactate concentrations. There ap Continue reading >>

Glyburide And Metformin (oral Route)

Glyburide And Metformin (oral Route)

Precautions Drug information provided by: Micromedex It is very important that your doctor check your progress at regular visits to make sure this medicine is working properly. Blood tests may be needed to check for unwanted effects. Under certain conditions, too much metformin can cause lactic acidosis. The symptoms of lactic acidosis are severe and quick to appear. They usually occur when other health problems not related to the medicine are present and very severe, such as a heart attack or kidney failure. The symptoms of lactic acidosis include abdominal or stomach discomfort; decreased appetite; diarrhea; fast, shallow breathing; a general feeling of discomfort; muscle pain or cramping; and unusual sleepiness, tiredness, or weakness. If you have any symptoms of lactic acidosis, get emergency medical help right away. It is very important to carefully follow any instructions from your health care team about: Alcohol—Drinking alcohol may cause severe low blood sugar. Discuss this with your health care team. Other medicines—Do not take other medicines unless they have been discussed with your doctor. This especially includes nonprescription medicines such as aspirin, and medicines for appetite control, asthma, colds, cough, hay fever, or sinus problems. Counseling—Other family members need to learn how to prevent side effects or help with side effects if they occur. Also, patients with diabetes may need special counseling about diabetes medicine dosing changes that might occur because of lifestyle changes, such as changes in exercise and diet. Furthermore, counseling on contraception and pregnancy may be needed because of the problems that can occur in patients with diabetes during pregnancy. Travel—Keep your recent prescription and your medical history with yo Continue reading >>

Lactic Acidosis And Exercise: What You Need To Know

Lactic Acidosis And Exercise: What You Need To Know

Muscle ache, burning, rapid breathing, nausea, stomach pain: If you've experienced the unpleasant feeling of lactic acidosis, you likely remember it. It's temporary. It happens when too much acid builds up in your bloodstream. The most common reason it happens is intense exercise. Symptoms The symptoms may include a burning feeling in your muscles, cramps, nausea, weakness, and feeling exhausted. It's your body's way to tell you to stop what you're doing The symptoms happen in the moment. The soreness you sometimes feel in your muscles a day or two after an intense workout isn't from lactic acidosis. It's your muscles recovering from the workout you gave them. Intense Exercise. When you exercise, your body uses oxygen to break down glucose for energy. During intense exercise, there may not be enough oxygen available to complete the process, so a substance called lactate is made. Your body can convert this lactate to energy without using oxygen. But this lactate or lactic acid can build up in your bloodstream faster than you can burn it off. The point when lactic acid starts to build up is called the "lactate threshold." Some medical conditions can also bring on lactic acidosis, including: Vitamin B deficiency Shock Some drugs, including metformin, a drug used to treat diabetes, and all nucleoside reverse transcriptase inhibitor (NRTI) drugs used to treat HIV/AIDS can cause lactic acidosis. If you are on any of these medications and have any symptoms of lactic acidosis, get medical help immediately. Preventing Lactic Acidosis Begin any exercise routine gradually. Pace yourself. Don't go from being a couch potato to trying to run a marathon in a week. Start with an aerobic exercise like running or fast walking. You can build up your pace and distance slowly. Increase the Continue reading >>

Metformin-related Lactic Acidosis: Case Report - Sciencedirect

Metformin-related Lactic Acidosis: Case Report - Sciencedirect

Open Access funded by Sociedad Colombiana de Anestesiologa y Reanimacin Lactic acidosis is defined as the presence of pH <7.35, blood lactate >2.0mmol/L and PaCO2 <42mmHg. However, the definition of severe lactic acidosis is controversial. The primary cause of severe lactic acidosis is shock. Although rare, metformin-related lactic acidosis is associated with a mortality as high as 50%. The treatment for metabolic acidosis, including lactic acidosis, may be specific or general, using sodium bicarbonate, trihydroxyaminomethane, carbicarb or continuous haemodiafiltration. The successful treatment of lactic acidosis depends on the control of the aetiological source. Intermittent or continuous renal replacement therapy is perfectly justified, shock being the argument for deciding which modality to use. We report a case of a male patient presenting with metformin poisoning as a result of attempted suicide, who developed lactic acidosis and multiple organ failure. The critical success factor was treatment with continuous haemodiafiltration. Definimos acidosis lctica en presencia de pH <7.35, lactato en sangre >2.0mmol/L y PaCO2 <42mmHg. Por otro lado, la definicin de acidosis lctica grave es controvertida. La causa principal de acidosis lctica grave es el estado de choque. La acidosis lctica por metformina es rara pero alcanza mortalidad del 50%. La acidosis metablica incluyendo a la acidosis lctica puede recibir tratamiento especfico o tratamiento general con bicarbonato de sodio, trihidroxiaminometano, carbicarb o hemodiafiltracin continua. El xito del tratamiento de la acidosis lctica yace en el control de la fuente etiolgica; la terapia de reemplazo renal intermitente o continua est perfectamente justificada, donde el argumento para decidir cul utilizar ser el estado de Continue reading >>

Lactic Acidosis: What You Need To Know

Lactic Acidosis: What You Need To Know

Lactic acidosis is a form of metabolic acidosis that begins in the kidneys. People with lactic acidosis have kidneys that are unable to remove excess acid from their body. If lactic acid builds up in the body more quickly than it can be removed, acidity levels in bodily fluids — such as blood — spike. This buildup of acid causes an imbalance in the body’s pH level, which should always be slightly alkaline instead of acidic. There are a few different types of acidosis. Lactic acid buildup occurs when there’s not enough oxygen in the muscles to break down glucose and glycogen. This is called anaerobic metabolism. There are two types of lactic acid: L-lactate and D-lactate. Most forms of lactic acidosis are caused by too much L-lactate. Lactic acidosis has many causes and can often be treated. But if left untreated, it may be life-threatening. The symptoms of lactic acidosis are typical of many health issues. If you experience any of these symptoms, you should contact your doctor immediately. Your doctor can help determine the root cause. Several symptoms of lactic acidosis represent a medical emergency: fruity-smelling breath (a possible indication of a serious complication of diabetes, called ketoacidosis) confusion jaundice (yellowing of the skin or the whites of the eyes) trouble breathing or shallow, rapid breathing If you know or suspect that you have lactic acidosis and have any of these symptoms, call 911 or go to an emergency room right away. Other lactic acidosis symptoms include: exhaustion or extreme fatigue muscle cramps or pain body weakness overall feelings of physical discomfort abdominal pain or discomfort diarrhea decrease in appetite headache rapid heart rate Lactic acidosis has a wide range of underlying causes, including carbon monoxide poisoni Continue reading >>

Hiv & Aids Information :: Factsheet Lactic Acidosis

Hiv & Aids Information :: Factsheet Lactic Acidosis

Please enter the email address. Separate multiple addresses with a comma. Lactic acidosis refers to a build-up of lactic acid in the blood. It is a rare but dangerous side-effect of some anti-HIV drugs most of these are no longer in regular use. Your HIV clinic will use blood tests to check your levels of lactic acid. Lacticacidosis is very rare. Nevertheless, it is an important subject to understandbecause people who develop the condition can become dangerously ill. Lacticacidosis is a serious side-effect of the nucleosidereverse transcriptaseinhibitor (NRTI)class of anti-HIV drugs. This class includes abacavir (Ziagen),didanosine (ddI, Videx), lamivudine (3TC, Epivir), stavudine (d4T,Zerit), tenofovir (Viread) andzidovudine (AZT, Retrovir). The drugsmost linked with lactic acidosis are stavudine and didanosine. However, neitherof these drugs is now used if any other treatment options are available, mainlybecause of the side-effects they can cause. Lactic acidosis is also apotential, but rare, side-effect of other drugs, including the commonlyprescribed diabetes drug, metformin. The term lactic acidosis is used to describehigh levels of a substance called lactate in the blood. Lactate is a by-productof the processing of sugar within the body. Lacticacidosis is one of several conditions which are believed to be caused by damage to mitochondria . Mitochondriaare found in all human cells and are involved in the production of energy.Other possible side-effects ofNRTIs which may also be associated withdamage to mitochondria include peripheral neuropathy (numbness or pain in the feetand hands); bone marrow suppression; pancreatitis (inflammation of thepancreas); hepatic steatosis (accumulation of fat in the liver); and myopathy(muscle damage). "Lactic acidosis may occurat a Continue reading >>

Lactic Acidosis

Lactic Acidosis

Patient professional reference Professional Reference articles are written by UK doctors and are based on research evidence, UK and European Guidelines. They are designed for health professionals to use. You may find one of our health articles more useful. Description Lactic acidosis is a form of metabolic acidosis due to the inadequate clearance of lactic acid from the blood. Lactate is a byproduct of anaerobic respiration and is normally cleared from the blood by the liver, kidney and skeletal muscle. Lactic acidosis occurs when the body's buffering systems are overloaded and tends to cause a pH of ≤7.25 with plasma lactate ≥5 mmol/L. It is usually caused by a state of tissue hypoperfusion and/or hypoxia. This causes pyruvic acid to be preferentially converted to lactate during anaerobic respiration. Hyperlactataemia is defined as plasma lactate >2 mmol/L. Classification Cohen and Woods devised the following system in 1976 and it is still widely used:[1] Type A: lactic acidosis occurs with clinical evidence of tissue hypoperfusion or hypoxia. Type B: lactic acidosis occurs without clinical evidence of tissue hypoperfusion or hypoxia. It is further subdivided into: Type B1: due to underlying disease. Type B2: due to effects of drugs or toxins. Type B3: due to inborn or acquired errors of metabolism. Epidemiology The prevalence is very difficult to estimate, as it occurs in critically ill patients, who are not often suitable subjects for research. It is certainly a common occurrence in patients in high-dependency areas of hospitals.[2] The incidence of symptomatic hyperlactataemia appears to be rising as a consequence of the use of antiretroviral therapy to treat HIV infection. It appears to increase in those taking stavudine (d4T) regimens.[3] Causes of lactic acid Continue reading >>

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