Metabolic Acidosis Quiz

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Questions and Answers

What characterizes metabolic acidosis in terms of blood pH and bicarbonate levels?

  • pH level less than 7.0 and HCO3– level less than 24 mEq/L
  • pH level between 7.35 and 7.45 and HCO3– level between 22-26 mEq/L
  • pH level greater than 7.35 and HCO3– level greater than 22 mEq/L
  • pH level less than 7.35 and HCO3– level less than 22 mEq/L (correct)

What compensatory mechanism do the lungs use to respond to metabolic acidosis?

  • Decreasement in respiratory rate
  • Prolonged exhalation to lessen oxygen intake
  • Kussmaul respiration to increase ventilation (correct)
  • Shallow breathing to retain carbon dioxide

Which of the following is a common cause of lactic acidosis?

  • Diarrhea
  • Cardiac arrest (correct)
  • Prolonged fasting
  • Diabetic ketoacidosis

In renal tubular acidosis, what is the main issue affecting the kidneys?

<p>Inability to excrete acids due to renal failure (D)</p> Signup and view all the answers

What condition leads to keto-acid accumulation due to the lack of glucose transport into cells?

<p>Diabetic ketoacidosis (D)</p> Signup and view all the answers

What is the primary function of ferrous sulfate in the body?

<p>To replace iron in hemoglobin (B)</p> Signup and view all the answers

What is the recommended way to minimize gastrointestinal upset when taking iron supplements?

<p>Take with a small nondairy snack (D)</p> Signup and view all the answers

How long should a patient remain upright after taking oral iron supplements?

<p>30 minutes (A)</p> Signup and view all the answers

What should patients be informed about regarding the appearance of their stool while on iron supplements?

<p>It will appear tarry black (B)</p> Signup and view all the answers

Why should iron supplements be stored out of reach of children?

<p>They resemble candy and can lead to toxicity (B)</p> Signup and view all the answers

In what manner should a patient take a liquid form of iron to prevent tooth staining?

<p>Use a straw to drink the solution (D)</p> Signup and view all the answers

What should patients do if they experience stomach upset from iron supplements?

<p>Take the supplement with a small snack (A)</p> Signup and view all the answers

Which of the following statements about iron supplementation is incorrect?

<p>Different brands of iron supplements can be used interchangeably. (B)</p> Signup and view all the answers

What is the primary cause of megaloblastic anemia?

<p>Vitamin B12 or folate deficiency (A)</p> Signup and view all the answers

Which symptom is specifically associated with vitamin B12 deficiency in megaloblastic anemia?

<p>Numbness and tingling (A)</p> Signup and view all the answers

What could potentially happen if vitamin B12 deficiency is left untreated?

<p>Irreversible neurological damage (B)</p> Signup and view all the answers

Which of the following is a recommended action to help reduce GI distress when taking NSAIDs?

<p>Take them with food (C)</p> Signup and view all the answers

Which of these conditions can lead to iron deficiency anemia as a consequence of NSAID use?

<p>Gastrointestinal bleeding (A)</p> Signup and view all the answers

When monitoring a patient on NSAIDs, what symptom should prompt immediate reporting to the primary healthcare provider?

<p>Dark, tarry stools (D)</p> Signup and view all the answers

What should be included in patient education regarding NSAID use?

<p>Report any changes in urinary output (C)</p> Signup and view all the answers

Which vitamin deficiencies can lead to megaloblastic anemia?

<p>Vitamin B12 and folate (D)</p> Signup and view all the answers

What condition can arise from chemotherapeutic drugs and corticosteroids?

<p>Bone marrow suppression (D)</p> Signup and view all the answers

Which of the following is a risk factor for increased clotting?

<p>Cirrhosis of the liver (A)</p> Signup and view all the answers

What is a common assessment finding for decreased clotting?

<p>Petechiae (B)</p> Signup and view all the answers

What should patients at risk for increased clotting be advised to do?

<p>Drink fluids (B)</p> Signup and view all the answers

Which physiological consequence is associated with decreased clotting?

<p>Prolonged internal bleeding (C)</p> Signup and view all the answers

What is an intervention that may be prescribed to decrease the risk of stroke in patients with atrial fibrillation?

<p>Direct thrombin inhibitors (C)</p> Signup and view all the answers

Which sign should patients with decreased clotting ability report immediately?

<p>Unusual bleeding or bruising (C)</p> Signup and view all the answers

Which statement regarding venous thrombosis is correct?

<p>It can cause pain, swelling, and warmth. (D)</p> Signup and view all the answers

What is the primary cause of pernicious anemia?

<p>Deficiency of intrinsic factor (C)</p> Signup and view all the answers

What can cause anemia due to chronic RBC loss?

<p>GI bleeding (B)</p> Signup and view all the answers

Which of the following conditions is classified as a type of megaloblastic anemia?

<p>Pernicious anemia (A)</p> Signup and view all the answers

What is a typical treatment regimen for patients with pernicious anemia after correcting the deficiency?

<p>Monthly vitamin B12 injections (C)</p> Signup and view all the answers

Which symptom is most likely associated with a client suffering from pernicious anemia?

<p>Fissure in the corner of the mouth (B)</p> Signup and view all the answers

How does sickle cell anemia primarily affect red blood cells?

<p>Results in abnormally shaped RBCs that can block vessels (C)</p> Signup and view all the answers

Which factor is linked to the development of autoimmune disorders such as pernicious anemia?

<p>Advanced age (C)</p> Signup and view all the answers

What is one consequence of a genetic predisposition in autoimmune disorders?

<p>It may be present in other family members (A)</p> Signup and view all the answers

What leads to respiratory acidosis?

<p>Inability of the lungs to remove CO2 (A)</p> Signup and view all the answers

Which condition is most commonly associated with respiratory acidosis?

<p>Asthma exacerbation (A)</p> Signup and view all the answers

What is a characteristic laboratory finding in respiratory acidosis?

<p>PaCO2 greater than 45 mm Hg (D)</p> Signup and view all the answers

Which mechanism helps the body compensate for respiratory acidosis?

<p>Increased excretion of metabolic acids (A)</p> Signup and view all the answers

In respiratory alkalosis, what occurs as a result of excessive CO2 removal?

<p>Decreased hydrogen ions and increased pH (D)</p> Signup and view all the answers

What could signify a decreased level of consciousness in respiratory acidosis?

<p>Low arterial blood pH (B)</p> Signup and view all the answers

Which of the following drugs can contribute to the development of respiratory acidosis?

<p>Anesthetics (B)</p> Signup and view all the answers

What is a primary consequence of hypercapnia in respiratory acidosis?

<p>Decreased pH in blood (A)</p> Signup and view all the answers

Flashcards

Metabolic Acidosis

A condition where the blood's pH falls below 7.35 and bicarbonate levels are low, caused by excess acid production or bicarbonate loss.

Metabolic Acidosis Causes

Metabolic acidosis can be caused by conditions like starvation, diabetes (ketoacidosis), sepsis, or kidney issues.

Ketoacidosis

A type of metabolic acidosis caused by the accumulation of ketone acids in the blood, often due to lack of glucose.

Lactic Acidosis

A type of metabolic acidosis caused by the buildup of lactic acid due to lack of oxygen in tissues.

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Kussmaul Respiration

A deep and rapid breathing pattern that is a compensatory mechanism for metabolic acidosis by removing excess carbon dioxide.

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Respiratory Acidosis Cause

Reduced CO2 removal by lungs, leading to increased blood CO2, carbonic acid, and lower blood pH.

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Respiratory Acidosis Symptoms

Headache, lightheadedness, decreased consciousness, and potentially dysrhythmias.

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Respiratory Acidosis Lab Findings

Blood pH below 7.35, PaCO2 above 45 mmHg, and normal or high bicarbonate (HCO3-) depending on compensation stage.

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Respiratory Acidosis Associated Conditions

Conditions impacting lung function (e.g., COPD, asthma exacerbations, pulmonary edema, sleep apnea) or affecting breathing (e.g., neuromuscular disorders, meds, head trauma).

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Respiratory Acidosis Compensation

Kidneys adjust bicarbonate levels in the blood over time (24-72 hrs or longer) to compensate for the acid build-up.

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Metabolic Alkalosis Cause

Loss of excessive acid through body or gain in excessive base.

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Respiratory Alkalosis Cause

Lungs remove excessively CO2

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Ferrous Sulfate Function

Ferrous sulfate replaces iron in hemoglobin, enabling oxygen transport.

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Iron Absorption Best Practice

Iron absorption is better on an empty stomach, but gastrointestinal upset is common. Taking it with a small, non-dairy snack can help.

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Iron and Milk Interaction

Avoid milk or antacids 2 hours before or after iron supplements.

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Administering Oral Iron

Give oral iron with 4-6 ounces of water (not milk).

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Post-Iron Administration

Have the patient sit upright for 30 minutes after taking oral iron to prevent esophageal irritation.

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Iron Supplementation & Medication

Treat iron supplementation like any medication, take it as prescribed. Don't use different brands interchangeably.

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Iron Supplementation Effects

Iron supplements can turn stool black and cause stomach upset; take with a small snack if needed, avoiding milk.

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Iron Toxicity Prevention

Store iron supplements in a childproof bottle out of reach of children. Toxicity is a serious risk, especially for children.

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Iron deficiency anemia

Anemia caused by a lack of iron, which is essential for red blood cell production.

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NSAIDs and Anemia

Nonsteroidal anti-inflammatory drugs (NSAIDs) can cause gastrointestinal bleeding, leading to iron deficiency anemia.

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NSAID side effects

NSAIDs, if used long-term, can cause gastrointestinal problems (GI), bleeding, and acute kidney injury.

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Celecoxib and GI distress

Celecoxib, an NSAID, should be taken with food to minimize gastrointestinal distress.

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Signs of GI bleeding from NSAIDs

Signs of GI bleeding from NSAIDs include dark, tarry stools, shortness of breath, edema, frequent indigestion, bloody vomit, and changes in urinary output.

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Megaloblastic Anemia

Anemia characterized by abnormally large red blood cells due to impaired DNA synthesis, often caused by vitamin deficiencies.

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Causes of Megaloblastic Anemia

Most commonly caused by deficiencies in vitamin B12 or folate. Other causes include certain medications, alcohol, and diseases that affect nutrient absorption.

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Symptoms of Megaloblastic Anemia

Fatigue, weakness, pallor, shortness of breath, glossitis, mouth sores, neurological symptoms (numbness, tingling, memory problems, and depression) if due to vitamin B12 deficiency.

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Pernicious Anemia

Anemia caused by the body's inability to absorb vitamin B12 due to a lack of intrinsic factor, a substance secreted by the stomach.

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Intrinsic Factor

A protein produced by the stomach that helps the body absorb vitamin B12 from food.

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What causes pernicious anemia?

Pernicious anemia is caused by a deficiency of intrinsic factor, which is needed for the absorption of vitamin B12 from the gut.

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Sickle Cell Anemia

A genetic disorder where red blood cells are abnormally shaped like sickles, leading to blockages in blood vessels and painful episodes.

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What is a common symptom of pernicious anemia?

A common symptom of pernicious anemia is pale skin, due to a lack of healthy red blood cells carrying oxygen.

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What are some treatments for pernicious anemia?

Pernicious anemia is typically treated with vitamin B12 injections initially, followed by monthly injections or oral B12 supplements for maintenance.

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How is sickle cell anemia inherited?

Sickle cell anemia is inherited in an autosomal recessive pattern, meaning both parents must carry the defective gene for a child to inherit the disease.

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Increased Clotting Risk Factors

Conditions that increase the likelihood of blood clots forming, including immobility, polycythemia (excess red blood cells), smoking, and certain chronic diseases.

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Venous Thrombosis

A blood clot that forms in a vein, most commonly in the legs, potentially leading to emboli (traveling clots).

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Arterial Thrombosis

A blood clot that forms in an artery, often not visible but causing decreased blood flow to the affected area.

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Decreased Clotting Risk Factors

Conditions that reduce the body's ability to form blood clots, including chemotherapy, corticosteroids, liver cirrhosis, and rare genetic diseases.

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Decreased Clotting Consequences

Prolonged internal or external bleeding due to the body's inability to form clots effectively.

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Internal/External Bleeding

Internal bleeding occurs within the body (e.g., brain, stomach, bladder) and external bleeding is visible.

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Anticoagulant/Antiplatelet Drugs

Medications used to prevent blood clot formation, including direct thrombin inhibitors, which are particularly useful in patients with atrial fibrillation.

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Monitoring for Bleeding

Patients taking anticoagulants/antiplatelet drugs should be closely monitored for signs of bleeding, such as bruising, blood in urine or stool.

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Study Notes

Metabolic Acidosis - Signs and Symptoms

  • Definition: Metabolic acidosis occurs due to increased metabolic acid or decreased base (bicarbonate). Kidneys are unable to excrete enough metabolic acids, which accumulate in the blood, or bicarbonate is removed from the body.
  • pH Level: Characterized by a pH level less than 7.35.
  • Bicarbonate (HCO3-) Level: Bicarbonate (HCO3-) level less than 22 mEq/L.
  • Causes: Increased acid production as a metabolic byproduct, or loss of bicarbonate (HCO3-) ions.
  • Compensation: Lungs increase rate and depth of ventilation (Kussmaul respiration) to remove excess carbon dioxide and lower carbonic acid levels in the blood.
  • Starvation Ketoacidosis: Occurs due to inadequate caloric intake and prolonged fasting, leading to fat use for energy and keto-acid accumulation in the blood.
  • Diabetic Ketoacidosis: Type 1 diabetes mellitus, glucose is not transported into cells due to insulin deficiency. Fat is used for energy, and keto-acids accumulate in the blood,
  • Lactic Acidosis: Occurs from lack of oxygen due to sepsis, cardiac arrest, trauma, or seizures, leading to anaerobic metabolism and lactic acid accumulation.
  • Renal Tubular Acidosis: Renal failure causes the kidneys to be unable to remove acids through urine acidification.

Hyperchloremic Acidosis

  • Cause: Gastrointestinal loss of bicarbonate (HCO3-).
  • Occurs with: Diarrhea and laxative use.

Signs and Symptoms of Metabolic Acidosis

  • Decreased level of consciousness (lethargy, confusion, coma)
  • Increased respiratory rate and depth (compensatory hyperventilation)
  • Abdominal pain
  • Dysrhythmias
  • Arterial Blood Gas (ABG) alterations:
    • pH below 7.35
    • PaCO2 normal if uncompensated, or below 35 mm Hg (4.7 kPa) if compensated.
    • HCO3- level below 21 mEq/L

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