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NCCAA Boards Review Kidney Liver
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Flashcards in this deck (233)

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  • What is the functional unit of the kidney?

    The nephron

    anatomy physiology

  • What are the components of the juxtamedullary nephron?

    • Cortex
    • Medulla
    anatomy nephron

  • What does Bowman's Capsule do?

    Encapsulates the glomerulus; controls extracellular volume and composition

    anatomy nephron

  • What is the site of bulk reabsorption in the nephron?

    Proximal Convoluted Tubule

    anatomy nephron

  • What does the Loop of Henle establish?

    Maintains osmotic gradient - countercurrent multiplier

    anatomy nephron

  • What percentage of cardiac output is delivered to the kidneys?

    25% or 1.25 L/min

    physiology renal

  • What percentage of Renal Blood Flow does the cortex require?

    80%

    physiology renal

  • What percentage of Renal Blood Flow does the medulla require?

    15%

    physiology renal

  • What happens to RBF during mild stress?

    RBF decreases slightly but GFR is maintained

    physiology renal

  • What happens to RBF and GFR during severe stress?

    Both RBF and GFR are reduced due to sympathetic stimulation

    physiology renal

  • What do juxtaglomerular cells release when blood pressure decreases?

    Renin

    physiology renal

  • What area of the kidney is most vulnerable to ischemic events?

    The outer medulla

    physiology renal

  • What is the function of the proximal convoluted tubule?

    Site of bulk reabsorption (67%)

    physiology nephron

  • What is the role of the Loop of Henle in urine concentration?

    Establishes and maintains osmotic gradient

    physiology nephron

  • What are the functions of the kidneys?

    • Maintain extracellular fluid composition
    • Maintain extracellular volume
    • Endocrine functions
    • Regulate arterial blood pressure
    kidneys functions

  • How do kidneys regulate extracellular volume?

    By controlling NaCl & H2O excretion

    kidneys extracellular volume

  • What endocrine functions do the kidneys perform?

    • Erythropoietin production
    • Renin-Angiotensin-Aldosterone system
    • Vitamin D
    kidneys endocrine functions

  • What happens during glomerular filtration?

    Filtrate of protein-free fluid is formed and absorbed into Bowman's capsule.

    kidneys glomerular filtration

  • What is the proximal tubule responsible for?

    Bulk reabsorption of filtrate (67%) including H2O, HCO3, Na, K, glucose.

    nephron proximal_tubule reabsorption

  • What is the function of the Loop of Henle?

    It acts as a countercurrent multiplier for water balance regulation.

    nephron loop_of_henle water_balance

  • What happens in the distal tubule?

    Fine adjustments are made to regulate Na, K, & H2O based on hormone actions.

    nephron distal_tubule regulation

  • What does ADH control in the kidneys?

    Reabsorption/secretion of H2O.

    kidneys adh water

  • What triggers the release of ADH?

    • Hypovolemia
    • Pain
    • Trauma
    • Stress
    adh release triggers

  • What effect does ADH have on the DCT and collecting duct?

    Increases their permeability to H2O, leading to concentrated urine, and H2O retention.

    adh permeability urine

  • What occurs when ADH is absent?

    Water remains trapped in the tubule, resulting in dilute large volume of urine.

    adh absence urine_volume

  • How does sodium influence extracellular fluid volume?

    It is crucial for maintaining volume but not for regulating osmolality.

    sodium extracellular fluid_volume

  • What is the countercurrent mechanism in the kidney?

    It regulates the movement of water (H2O) and solutes (NaCl, Urea) across tubule walls.

    kidney countercurrent mechanism

  • What is the osmolarity gradient in the Loop of Henle?

    Increases from 300 mOsm to 1200 mOsm as it descends into the medulla.

    loop_of_henle osmolarity gradient

  • What is the significance of proteinuria?

    It indicates damage to the filtration process in the kidneys.

    kidneys proteinuria filtration

  • What determines the volume of extracellular fluid (ECF)?

    Sodium concentration determines ECF volume.

    physiology sodium ecf

  • What happens when Na content increases?

    • ECF osmolality increases
    • ADH is released
    • Total volume increases
    physiology sodium adh

  • What happens when Na content decreases?

    • ECF osmolality decreases
    • ADH release decreases
    • H2O is excreted in dilute urine
    physiology sodium adh

  • What is the relationship between GFR and Na excretion?

    Na excretion is directly proportional to changes in GFR.

    physiology gfr sodium

  • What role does Atrial Natriuretic Peptide (ANP) play in Na excretion?

    Na excretion is directly proportional to changes in ANP released from the right atria.

    physiology anp sodium

  • What is the effect of aldosterone on Na excretion?

    Na excretion is inversely proportional to aldosterone levels.

    physiology aldosterone sodium

  • What stimulates the release of aldosterone?

    • Angiotensin II
    • High serum K
    physiology aldosterone hormones

  • What happens when aldosterone levels increase?

    • Na reabsorption increases
    • K excretion increases
    • More H2O is retained
    physiology aldosterone sodium

  • What triggers the release of renin?

    • Decreased renal perfusion
    • Sympathetic activity
    physiology renin raas

  • What does renin convert angiotensinogen into?

    Renin converts angiotensinogen into angiotensin I.

    physiology renin angiotensinogen

  • What is the role of ACE in the RAAS?

    ACE converts angiotensin I to angiotensin II in the lungs.

    physiology ace raas

  • What effects does angiotensin II have?

    • Promotes aldosterone release
    • Causes vasoconstriction
    physiology angiotensin_ii raas

  • What is the effect of sympathetic activity on ADH?

    Sympathetic activity promotes the release of ADH.

    physiology sympathetic adh

  • What is the importance of the juxtaglomerular apparatus?

    It regulates blood pressure and renal function by producing renin.

    physiology juxtaglomerular raas

  • What percentage of resting blood pressure is regulated by renin?

    85% of resting blood pressure is regulated by renin.

    physiology blood_pressure renin

  • What are the key components of the RAAS system?

    • Renin
    • Angiotensinogen
    • Angiotensin I
    • Angiotensin II
    • Aldosterone
    physiology raas components

  • What diagram illustrates the Renin-Angiotensin-Aldosterone System (RAAS)?

    Diagram of the Renin-Angiotensin-Aldosterone System (RAAS)

    physiology raas diagram

  • What is the role of renin in blood pressure regulation?

    Renin increases blood pressure by inducing events such as vasoconstriction, water retention, and sodium retention.

    physiology renin blood_pressure

  • What is the function of ADH?

    ADH retains water and triggers thirst, increasing blood volume.

    physiology adh water_retention

  • What is the effect of Aldosterone?

    Aldosterone retains sodium, leading to water retention and increased blood volume.

    physiology aldosterone sodium_retention

  • What do carbonic anhydrase inhibitors do?

    They inhibit HCO3 and Na reabsorption in the proximal tubule, affecting acid-base balance.

    pharmacology diuretics carbonic_anhydrase

  • What are the side effects of loop diuretics?

    • Hypokalemia
    • Hypovolemia
    • Hypotension
    • Ototoxicity
    • Metabolic Alkalosis
    pharmacology side_effects loop_diuretics

  • What is the mechanism of thiazide diuretics?

    Thiazides inhibit Na+ reabsorption in the early distal convoluted tubule.

    pharmacology diuretics thiazides

  • What are common side effects of thiazides?

    • Hypokalemia
    • Hypotension
    • Hyperglycemia
    • Metabolic Alkalosis
    • Hypercalcemia
    • Hyperuricemia
    pharmacology side_effects thiazides

  • What is the action of K+-sparing diuretics?

    They act as competitive antagonists to aldosterone, inhibiting Na reabsorption and decreasing K secretion.

    pharmacology diuretics k+-sparing

  • What is the role of osmotic diuretics?

    They increase osmolality in the renal tubule, preventing water reabsorption.

    pharmacology diuretics osmotic

  • What can result from the use of carbonic anhydrase inhibitors?

    • Hyperchloremic metabolic acidosis
    • Hypokalemia
    pharmacology side_effects carbonic_anhydrase

  • What are the effects of loop diuretics on electrolyte levels?

    They can cause hypokalemia and metabolic alkalosis.

    pharmacology loop_diuretics electrolytes

  • What is a primary use of acetazolamide?

    It is used to decrease intraocular pressure by reducing aqueous humor formation.

    pharmacology acetazolamide uses

  • What are the renal function tests important for?

    They are essential for recognizing and managing acute renal failure (ARF) vs chronic renal failure (CRF).

    physiology renal_function arf crf

  • What are the sites of action for various diuretics in the nephron?

    • PCT: Carbonic anhydrase inhibitors
    • Loop of Henle: Loop diuretics
    • DCT: Thiazides
    • Collecting Duct: K+-sparing diuretics
    physiology nephron diuretics

  • What is the function of the collecting duct in the nephron?

    It is involved in water reabsorption influenced by ADH.

    physiology collecting_duct adh

  • What do thiazide diuretics treat?

    They are often used for hypertension and nephrogenic diabetes insipidus.

    pharmacology thiazides treatment

  • What are the effects of loop diuretics on urine?

    They increase the excretion of Na, K, and H2O, leading to diuresis.

    pharmacology loop_diuretics urine

  • What is the impact of thiazides on calcium levels?

    Thiazides can cause hypercalcemia.

    pharmacology thiazides calcium

  • What is the mechanism of action of loop diuretics?

    They bind to the Na-K-2Cl symporter in the ascending loop of Henle, diminishing osmotic gradient.

    pharmacology loop_diuretics mechanism

  • What are K+-sparing diuretics typically used to treat?

    They are used to prevent hypokalemia in patients on other diuretics.

    pharmacology k+-sparing treatment

  • What is the role of the distal convoluted tubule (DCT)?

    The DCT is involved in further sodium reabsorption and is the site for thiazide action.

    physiology dct sodium_reabsorption

  • What is the significance of loop diuretics in renal physiology?

    They are powerful diuretics that affect electrolyte balance and fluid volume.

    physiology loop_diuretics renal

  • What are the effects of osmotic diuretics on potassium levels?

    They can cause increased secretion of potassium in the urine.

    pharmacology osmotic_diuretics potassium

  • What are the common side effects of K+-sparing diuretics?

    • Hyperkalemia
    • Metabolic Acidosis
    pharmacology side_effects k+-sparing

  • What is the primary mechanism of Mannitol?

    Mannitol increases osmolality in renal tubule, preventing water reabsorption.

    pharmacology mannitol mechanism

  • What is the effect of diuretics on blood pressure?

    Diuretics can lower blood pressure by reducing blood volume.

    pharmacology diuretics blood_pressure

  • What is the role of ADH in urine concentration?

    ADH increases the permeability of the collecting duct to water, concentrating urine.

    physiology adh urine_concentration

  • What is the site of action for carbonic anhydrase inhibitors?

    They act in the proximal tubule.

    pharmacology carbonic_anhydrase site_of_action

  • What are the effects of thiazides on blood sugar levels?

    Thiazides can cause hyperglycemia.

    pharmacology thiazides blood_sugar

  • What is the mechanism of action of spironolactone?

    Spironolactone acts as an aldosterone antagonist, inhibiting Na reabsorption and decreasing K secretion.

    pharmacology spironolactone mechanism

  • What are the effects of thiazides on uric acid levels?

    Thiazides can cause hyperuricemia.

    pharmacology thiazides uric_acid

  • What is the primary use of loop diuretics?

    Loop diuretics are primarily used to treat edema and hypertension.

    pharmacology loop_diuretics uses

  • What does ADH do to urine output?

    ADH decreases urine output by promoting water reabsorption.

    physiology adh urine_output

  • What are the effects of osmotic diuretics on urine flow?

    Osmotic diuretics increase urine flow by preventing water reabsorption.

    pharmacology osmotic_diuretics urine_flow

  • What is the significance of electrolyte balance in diuretics?

    Diuretics can disrupt electrolyte balance, leading to complications like hypokalemia or hyperkalemia.

    pharmacology electrolyte_balance diuretics

  • How do loop diuretics affect osmotic gradients?

    They diminish osmotic gradients in the nephron, leading to increased diuresis.

    pharmacology loop_diuretics osmotic_gradients

  • What is the mechanism of action for thiazides?

    Thiazides inhibit sodium reabsorption in the early distal convoluted tubule.

    pharmacology thiazides mechanism

  • What is the role of the proximal tubule in renal function?

    The proximal tubule is responsible for the majority of sodium and water reabsorption.

    physiology proximal_tubule renal_function

  • What is the primary action of loop diuretics on electrolytes?

    They promote the excretion of sodium, potassium, and water.

    pharmacology loop_diuretics electrolytes

  • What is the site of action for thiazide diuretics?

    Thiazide diuretics act in the early distal convoluted tubule.

    pharmacology thiazides site_of_action

  • What are the effects of carbonic anhydrase inhibitors on bicarbonate?

    They decrease bicarbonate reabsorption, leading to metabolic acidosis.

    pharmacology carbonic_anhydrase bicarbonate

  • What role does aldosterone play in renal physiology?

    Aldosterone promotes sodium reabsorption and potassium excretion in the distal nephron.

    physiology aldosterone renal

  • What are the common side effects of loop diuretics?

    • Hypokalemia
    • Ototoxicity
    • Metabolic Alkalosis
    pharmacology side_effects loop_diuretics

  • What is the impact of diuretics on hydration status?

    Diuretics can lead to dehydration if fluid intake is not maintained.

    pharmacology diuretics hydration

  • What are the effects of thiazides on potassium levels?

    Thiazides can cause hypokalemia.

    pharmacology thiazides potassium

  • What is the primary action of Mannitol in the kidney?

    Mannitol increases osmotic pressure in the renal tubule, preventing water reabsorption.

    pharmacology mannitol kidney

  • What is the mechanism of action for acetazolamide?

    Acetazolamide inhibits carbonic anhydrase, reducing bicarbonate reabsorption.

    pharmacology acetazolamide mechanism

  • What are the effects of K+-sparing diuretics on potassium levels?

    They can cause hyperkalemia due to reduced potassium secretion.

    pharmacology k+-sparing potassium

  • What is the normal urine output (UO)?

    <blockquote>

    0.5 mL/kg/hr

    </blockquote>

    renal function tests

  • What is the normal GFR?

    125 mL/min

    renal function tests

  • What is the normal BUN level?

    10-20 mg/dL

    renal function tests

  • What is the normal serum creatinine for men?

    0.8-1.3 mg/dL

    renal function tests

  • What is the normal serum creatinine for women?

    0.6-1.0 mg/dL

    renal function tests

  • What is the normal creatinine clearance?

    100-125 mL/min

    renal function tests

  • What is the normal BUN:creatinine ratio?

    10:1

    renal function tests

  • What does oliguria indicate?

    Decreased renal perfusion, often from hypovolemia

    renal function tests

  • Does normal UO rule out renal failure?

    No

    renal function tests

  • How is acute renal failure defined?

    Reduction in GFR sustained over 2 weeks

    renal failure

  • What lab abnormalities are associated with acute renal failure?

    Increased BUN & Creatinine levels

    renal failure

  • What is the etiology of acute renal failure?

    Prerenal (70%), Renal (25%), Postrenal (5%)

    renal failure

  • What is a common cause of prerenal acute renal failure?

    Hypovolemia

    renal failure

  • What is a common cause of renal acute renal failure?

    Acute tubular necrosis (ATN)

    renal failure

  • What are common nephrotoxic drugs?

    Contrast dye, Aminoglycosides, NSAIDs

    renal failure drugs

  • What is a common cause of postrenal acute renal failure?

    Mechanical obstruction to outflow

    renal failure

  • What is the mortality rate of acute renal failure in surgical settings?

    50%

    renal failure surgery

  • What are the symptoms of chronic renal failure?

    Chronic anemia, Pruritus, Coagulopathies, Electrolyte disturbances

    renal failure symptoms

  • What is a common treatment for chronic anemia in renal failure?

    Recombinant erythropoietin

    renal failure treatment

  • What can cause pruritus in chronic renal failure?

    Side effect of recombinant erythropoietin lowering histamine

    renal failure symptoms

  • What electrolyte imbalance is common in chronic renal failure?

    Hyperkalemia

    renal failure electrolytes

  • What can variations in intravascular fluid volume depend on in chronic renal failure?

    Dialysis

    renal failure fluid

  • What is hyperkalemia?

    Decreased K excretion caused by decreased GFR

    medical pathophysiology

  • What causes hypocalcemia?

    Decreased production of Vitamin D results in diminished absorption of Ca2+

    medical pathophysiology

  • What is the effect of decreased Ca2+ on parathyroid hormone?

    Stimulates parathyroid hormone release and results in bone resorption of Ca2+

    medical endocrinology

  • What are ESRD patients prone to due to hypocalcemia?

    Pathologic fractures

    medical pathophysiology

  • What are the effects of hypermagnesemia?

    • Potentiates NDMR & DMR blockade
    • Metabolic acidosis
    • Neuropathies
    medical pathophysiology

  • What is the most common cause of death in ESRD patients?

    Sepsis

    medical pathophysiology

  • What are pericardial effusions associated with?

    ESRD

    medical pathophysiology

  • What is expected in recent dialysis regarding fluid composition?

    Dry, low electrolyte composition of intravascular volume

    medical anesthesia

  • What to expect in delayed dialysis regarding fluid composition?

    Full, possible high value of electrolytes

    medical anesthesia

  • What are appropriate solutions for CRF patients?

    Normal saline and D5W; caution with D5W due to hypotonicity

    Traditionally no LR due to K levels in solution

    medical anesthesia

  • What is a key consideration for IV fluid delivery in CRF patients?

    Use micro-drip IV tubing to limit fluid delivery

    medical anesthesia

  • When should elective surgery be postponed for CRF patients?

    If K > 5.5 mEq/dL

    medical anesthesia

  • What is the nephrotoxicity associated with volatile anesthetics?

    Fl-nephrotoxicity with Sevoflurane noted in rats, not humans

    medical anesthesia

  • Which volatile anesthetics are acceptable for CRF patients?

    Isoflurane & Desflurane

    medical anesthesia

  • What happens to IV anesthetics in CRF patients?

    Increased Vd with drugs cleared through renal mechanism

    medical anesthesia

  • What is the effect of decreased protein binding in CRF patients?

    Increased free drug for receptor binding

    medical anesthesia

  • What is the effect of opioids in CRF patients?

    Increased ventilator depression due to active metabolites dependence on renal clearance

    medical anesthesia

  • What is a concern with succinylcholine in CRF patients?

    Transient increase in serum K (0.5-1.0 mEq/dL)

    medical anesthesia

  • What muscle relaxants should be avoided in CRF patients?

    Long acting NDMB with renal clearance dependence (e.g., Pancuronium)

    medical anesthesia

  • Which muscle relaxants are ideal for CRF patients?

    Atracurium & Cisatracurium

    medical anesthesia

  • What antibiotics are highly nephrotoxic?

    Aminoglycosides (Gentamycin & Neomycin) & Vancomycin

    medical pharmacology

  • What is the #1 mortality cause in CRF patients?

    Sepsis

    medical pathophysiology

  • What is the #1 morbidity cause in CRF patients?

    Infections

    medical pathophysiology

  • What is the purpose of TURP?

    Treatment of urinary obstruction due to BPH

    medical urology

  • What technique is used in TURP?

    Cystoscopy to resect the prostate with electrocautery

    medical urology

  • What spinal technique is required for TURP?

    A T-10 level block

    medical urology

  • What syndrome is associated with TURP?

    TURP Syndrome - Neurological & CV disorder related to excessive absorption of irrigation fluid (glycine 1.5%)

    medical urology

  • What electrolyte disturbance is commonly associated with TURP Syndrome ?

    Hyponatremia

    medical electrolytes

  • What type of irrigation fluid is recommended for TURP procedures?

    Isotonic fluids such as sorbitol

    medical irrigation

  • What is a disadvantage of using glycine as an irrigation fluid?

    It can lead to blindness

    medical irrigation

  • What are the advantages of using sorbitol and mannitol as irrigation fluids?

    • Nonelectrolytic
    • Isomolar
    • Rapidly cleared from plasma
    medical irrigation

  • What is the recommended treatment for hyponatremia?

    • Diuretics (Furosemide, 5-20 mg)
    • Sodium replacement if Na+ < 120
    medical treatment

  • What is the caution when using diuretics for hyponatremia?

    They can worsen hyponatremia

    medical treatment

  • What saline concentration is used for sodium replacement in severe hyponatremia?

    Hypertonic (3%) saline given slowly

    medical treatment

  • What are the key concepts of nephrectomy regarding anesthesia?

    Combined general and epidural anesthesia is utilized for postoperative pain control

    surgery nephrectomy

  • What concerns are associated with nephrectomy?

    • Increased intraoperative blood loss
    • Positioning (lateral or supine)
    • Urine output maintenance
    surgery nephrectomy

  • What urine output is maintained during nephrectomy?

    0.5 mL/kg/hr

    surgery nephrectomy

  • What are the contraindications for ESWL?

    • Pregnancy
    • UTI
    • Coagulopathies
    surgery eswl

  • What are relative contraindications for ESWL?

    • AAA < 5cm
    • Morbid obesity
    • Pacemakers
    surgery eswl

  • What medication may be requested during ESWL to increase heart rate?

    Anticholinergics

    surgery eswl

  • What complications can arise from ESWL?

    • Cardiac dysrhythmias
    • Pulmonary damage from misplaced shock application
    surgery eswl

  • What are the key concepts for renal transplantation?

    • Focus on preexisting comorbidities
    • Preoperative assessment for electrolyte and acid-base balance
    surgery transplantation

  • What is essential for fluid management during renal transplantation?

    Tight management to euvolemia to ensure adequate perfusion after graft

    surgery transplantation

  • What is often requested after anastomosis in renal transplantation?

    Diuretic agents

    surgery transplantation

  • What may be needed in renal transplantation for patients under stress?

    Stress-dose steroids

    surgery transplantation

  • What is the risk associated with renal transplantation?

    Increased risk of intraoperative blood loss

    surgery transplantation

  • What percentage of cardiac output does the liver receive?

    20-25%

    physiology liver

  • What are the two sources of blood supply to the liver?

    1. Hepatic Artery
    2. Portal Vein
    anatomy liver

  • What percentage of blood flow does the hepatic artery supply to the liver?

    25%

    physiology blood_flow

  • What percentage of oxygen supply does the hepatic artery provide?

    50%

    physiology oxygen_supply

  • What regulates blood flow in the hepatic artery?

    Sympathetic tone & adenosine mediator

    physiology regulation

  • What does low portal vein flow increase in the hepatic artery?

    Adenosine

    physiology flow_regulation

  • What percentage of blood flow does the portal vein supply to the liver?

    75%

    physiology blood_flow

  • What type of blood does the portal vein carry?

    Partially deoxygenated blood, metabolites, nutrients, & toxins

    physiology blood_type

  • What condition can cause venous blood to be diverted from the liver?

    Portal hypertension

    pathology portal_hypertension

  • What is the exit route for blood from the liver?

    Hepatic veins to inferior vena cava

    anatomy blood_flow

  • What is a key metabolic activity of the liver related to oncotic pressure?

    Albumin production

    metabolism liver

  • What processes are involved in glucose storage in the liver?

    Glycogenesis, Glycogenolysis, Gluconeogenesis

    metabolism glucose

  • What is formed during fat metabolism in the liver?

    Lipoproteins

    metabolism fat

  • What is the liver's role in ammonia metabolism?

    Detoxification of ammonia

    metabolism ammonia

  • What is heme metabolism in the liver associated with?

    Metabolizing hemoglobin from ruptured RBCs

    metabolism heme

  • What is synthesized by the liver that aids in lipid absorption?

    Bile

    metabolism bile

  • What percentage of total blood volume is contained in the liver?

    10-15%

    anatomy blood_volume

  • What clotting factors are synthesized in the liver?

    Factor II, VII, IX, X; Protein C

    physiology clotting_factors

  • What cells in the liver are responsible for clearing byproducts of fibrinolysis?

    Kupffer cells

    anatomy kupffer_cells

  • What is the role of bile salts produced by the liver?

    Aid in absorbing, transporting, and excreting lipids

    metabolism bile_salts

  • What is the hepatic portal system responsible for?

    Circulation of blood from GI tract to liver

    anatomy portal_system

  • What is TIPS in relation to hepatic surgical procedures?

    Transjugular intrahepatic portosystemic shunt

    surgery tips

  • What is the primary function of the liver in lipid metabolism?

    Formation of lipoproteins and fatty acid transport

    metabolism lipid

  • What is the significance of bile in fat absorption?

    Allows absorption of fatty acids, fat-soluble vitamins, & cholesterol

    metabolism bile

  • What are the effects of portal hypertension on liver blood flow?

    Diverts venous blood from liver to circulation

    pathology portal_hypertension

  • What is the hepatic artery's role in liver blood supply?

    Supplies oxygen-rich blood to the liver

    physiology blood_supply

  • What does the portal vein connect?

    GI tract to the liver

    anatomy portal_vein

  • What is the primary function of Kupffer cells?

    Clear byproducts of fibrinolysis

    anatomy kupffer_cells

  • What is the impact of liver diseases on anesthetic management?

    Requires understanding of hepatic functions and pathology

    anesthesia liver_pathology

  • What is the relationship between hepatic artery flow and portal vein flow?

    Reciprocal; low portal flow increases hepatic artery flow

    physiology reciprocal_flow

  • What is the liver's role in drug metabolism?

    Carries metabolic waste products/drug metabolites

    metabolism drug_metabolism

  • What is the significance of albumin produced by the liver?

    Maintains oncotic pressure

    metabolism albumin

  • What does the liver produce that is critical for blood clotting?

    Clotting factors

    physiology clotting

  • What is the liver's function in glucose metabolism?

    Storage and regulation of glucose levels

    metabolism glucose

  • What is the primary function of bile salts?

    Aid in lipid absorption and transport

    metabolism bile_salts

  • What is the main metabolic function of the liver related to proteins?

    Synthesis of proteins including clotting factors

    metabolism proteins

  • What diagram illustrates the hepatic portal system?

    Diagram of the hepatic portal system

    anatomy hepatic_portal_system

  • What is the process of detoxification in the liver?

    • Biotransformation of active metabolites by cytochrome P-450
    • Renal/bile excretion
    • Intrinsic metabolism for clearance
    detoxification liver metabolism

  • What is the First Pass Effect?

    • Phase I (oxidative & reductive) reactions
    • Phase II (conjugation) reactions
    metabolism pharmacology

  • What does the cytochrome P-450 induction system influence?

    • Plasma concentration
    • Systemic drug availability
    pharmacology metabolism

  • What are the causes of Acute Hepatitis?

    • Viral infections: Hep A, B, C, D, E; Epstein-Barr, Herpes simplex
    • Non-Viral: Drug/toxin induced, hypoxic induction
    hepatitis liver pathology

  • What should be done before elective surgery in cases of liver dysfunction?

    • Postpone until liver function tests are normal
    surgery liver health

  • What characterizes Chronic Hepatitis?

    • Lasts longer than 6 months
    • Cirrhosis: Active destruction of liver architecture
    hepatitis liver pathology

  • What is cholestasis commonly associated with?

    • Frequent cholelithiasis
    • Parenchymal damage and liver failure
    cholestasis liver pathology

  • What is Halothane Hepatitis?

    • Immune hepatitis from halothane metabolism byproducts
    • Induced hepatic dysfunction from a single exposure
    hepatitis liver anesthesia

  • What are the cardiovascular effects of liver failure?

    • Hyperdynamic state: ↑ CO/HR
    • Increased total blood volume due to ↑ RAAS
    liver failure cardiovascular

  • What are the anesthetic implications of liver failure?

    • Ischemic hepatitis due to ↓ CO
    • Increased need for vasopressors
    anesthesia liver health

  • What central nervous system symptoms are associated with liver failure?

    • ↑ circulating NO: Vasodilation
    • Encephalopathy leading to cerebral edema
    liver failure cns

  • What are the respiratory effects of liver failure?

    • Chronic hypoxemia
    • Pulmonary HTN
    • Decreased ability for airway protection
    liver failure respiratory

  • What are the renal effects of liver failure?

    • Ascites (↓ compliance)
    • Coagulopathy (↑ PT/INR)
    liver failure renal

  • What hematological effects are seen in liver failure?

    • Impaired clotting factor synthesis
    • Thrombocytopenia
    liver failure hematology

  • What endocrine effects occur in liver failure?

    • Hypoglycemia
    • Overall impaired glucose control
    liver failure endocrine

  • What is hepatorenal syndrome?

    • Decreased GFR
    • Prerenal azotemia
    liver renal syndrome

  • What preoperative evaluations are necessary for patients with liver failure?

    • Confirm electrolyte levels
    • Evaluate all systems for liver failure involvement
    preoperative liver health

  • What is the goal of anesthetic management prior to elective surgery?

    To maintain adequate perfusion of the liver through control of SNS, CO, and fluid status.

    anesthesia surgery

  • Which anesthetic agent dilates the hepatic artery and preserves flow reciprocity?

    Isoflurane

    anesthesia agents

  • What is the impact of sympathetic activation on hepatic blood flow?

    It decreases hepatic blood flow; avoid light anesthesia and hypovolemia.

    anesthesia hbf

  • What is the key concept regarding volatile anesthetic agents?

    Minimal metabolism by P450 system (except Halothane).

    anesthesia volatile_agents

  • Which volatile agent is best for maintaining hepatic blood flow?

    Isoflurane

    anesthesia volatile_agents

  • Which volatile agent has the least biotransformation?

    N2O then Desflurane

    anesthesia volatile_agents

  • How is Propofol metabolized?

    Metabolized by the liver as well as extra-hepatic mechanisms.

    anesthesia iv_agents

  • What determines the duration of action of Sodium Thiopental?

    Liver metabolism; careful titration is required due to hypoalbuminemia.

    anesthesia iv_agents

  • What is the clearance of Ketamine, Etomidate, and Thiopental dependent on?

    Hepatic blood flow.

    anesthesia iv_agents

  • What is the effect of hypoalbuminemia on neuromuscular blockers?

    Increased half-life and increased potency.

    anesthesia neuromuscular_blockers

  • What should be avoided in encephalopathic patients regarding anesthetics?

    benzodiazepines.

    anesthesia risks

  • What is the effect of succinylcholine in patients with decreased plasma cholinesterase levels?

    Anticipate prolonged duration of action.

    anesthesia neuromuscular_blockers

  • Which neuromuscular blockers are heavily dependent on hepatobiliary metabolism?

    Rocuronium and Vecuronium.

    anesthesia neuromuscular_blockers

  • What is the best neuromuscular blocker for hepatic patients?

    Cisatracurium due to extra-hepatic pathways of elimination.

    anesthesia neuromuscular_blockers

  • What is Hepatopulmonary Syndrome?

    Intrapulmonary vascular dilatations and increased alveolar-arterial oxygen gradient in end-stage liver disease.

    anesthesia hepatopulmonary_syndrome

  • What is a hallmark sign of Hepatopulmonary Syndrome?

    Orthodeoxia (hypoxia when the patient stands).

    anesthesia hepatopulmonary_syndrome

  • What is the pathophysiology of Hepatopulmonary Syndrome?

    Intrapulmonary dilation and increased perfusion relative to ventilation.

    anesthesia hepatopulmonary_syndrome