Exam 3 Flashcards
1
Q
- what are the functions of diuretics (2)?
- What are diuretics indicated for (6)?
- Overall, what are the most common adverse effects with diuretic use?
A
- increase urine produced by kidneys and increase sodium output.
- edema (associated w/ CHF), pulmonary edema, liver disease, renal disease, hypertension, conditions causing hyperkalemia
- GI, fluid and electrolyte imbalance, hypotension, and electrolyte disturbance.
2
Q
- Name the 5 categories of diuretics:
- What are Thiazide diuretics indicated for, and where do they work?
- What are Loop diuretics indicated for, and where do they work?
- What are potassium-sparing diuretics indicated for, and where do they work?
- What are Carbonic Anhydrase Inhibitor diuretics indicated for, and where do they work?
- What are Osmotic diuretics indicated for, and where do they work?
A
- Thiazides, Loop, potassium-sparing, carbonic anhydrase inhibitors, osmotic diuretics
- edema associated w/ CHF, cirrhosis, HTN. Distal convoluted tubule
- CHF. Loop of Henle.
- CHF and HTN. Distal tubule and collecting duct.
- Increased Ocular pressure. Proximal tubule.
- Increased Intra-cranial pressure. Glomerulus, tubule.
3
Q
- Name the potassium-wasting diuretic that provides maximal urine output:
- Name the potassium-sparing diuretic:
- Both of these drugs can cause alterations of which electrolytes?
A
- furosemide
- spironolactone
- Na+, Ca+, Mg+
4
Q
- As nurses, what should we assess for with diuretics?
- What should we be watching out for (as far as cautions)?
- What condition can be worsened with diuretics?
- Diuretics may inhibit the breakdown of …………… causing hyper………… .
- Thiazides may cause sun sensitivity increasing …….. skin conditions.
A
- Patient history, physical exam, and allergies. Skin, edema, cardiopulmonary status, weight, and fluid in and out. Liver, renal labs
- can cause dizziness and falls, safety measures with elderly.
- Gout b/c urates get resorbed
- glucose, hyperglycemia
- Lupus
5
Q
- Name the prototype Thiazide:
- Action:
- Indications:
- Contraindications:
A
- Hydrochlorothiazide (HydroDiuril)
- Blocks chloride pump causing chloride and sodium to be excreted in urine
- edema from CHF, liver and renal diseases, hypertension
- Lithium use, pregnancy/lactation, fluid and electrolyte imbalance.
6
Q
- Symptoms of hypokalemia:
2. Which diuretic is famous for causing this?
A
- leg cramps, constantly tired, alkalosis, shallow breath, irritable, confused, weakness, arrhythmias, thready pulse, intestinal immotility.
- Furosemide (Lasix)
7
Q
- What is the prototype Loop Diuretic? Is it strong?
- Action:
- Indications:
- contraindications:
- What two things can happen if administered too quickly?
- Drug to drug:
A
- Furosemide (Lasix). Yes, much stronger than other diuretics. Bumetandine is a stronger loop diuretic.
- Blocks chloride pump in ascending loop of henle reducing resorption of Na+ and chloride
- acute CHF, acute pulmonary edema, edema r/t CHF, edema r/t renal or liver disease, hypertension
- electrolyte depletion, pregnancy/lactation, anuria, renal failure, and hepatic coma.
- tinnitus and hypotension. Can case ototoxicity
- NSAIDs, aminoglycosides, anticoagulation, cisplatine
8
Q
- Prototype Potassium-sparing (plus one more):
- Action
- Indications:
- Contraindications:
- Adverse Effects:
- Drug to drug:
A
- Spironolactone, triamterene
- Block the actions of aldosterone in the distal tubule. Causes a loss of sodium while retaining potassium
- Hyperaldosteronism, Adjunct to Thiazide or loop diuretics. Patients who are at risk for hypokalemia
- hyperkalemia, renal disease or anuria, patients taking amiloride or triamterene
- Hyperkalemia
- salicylates
9
Q
- Name 2 Carbonic Anhydrase Inhibitors:
- What are these drugs used for?
- Action:
- Indication:
A
- acetazolamide (Diamox), and methazolamide (generic).
- Used as adjuncts to other diuretics when a more intense diuresis is needed.
- blocks the effects of carbonic anhydrase causing more sodium and bicarbonate to be excreted in urine
- adjunct diuresis and Glaucoma
10
Q
- Prototype Osmotic diuretic:
- Action:
- Indications:
A
- Mannitol (Omitrol)
- pulls water into renal tubule without sodium loss
- Intracranial pressure, acute renal failure due to shock, overodose, or trauma
11
Q
- What 3 things determine blood pressure?
- Briefly cover RAAS
- What 4 things does hypertension cause?
- Give the ranges of BP:
A
- Heart rate, stroke volume (amount pumped from ea ventricle on ea heartbeat), and total peripheral resistance (reisitance of arteries to the blood).
- Renin released from kidney upon decreased perfusion triggers liver to produce angiotensin 1. Lungs convert angiotensin 1 to 2. Angiotensin 2 vasoconstricts and triggers aldosterone from adrenal cortex. Aldosterone causes resorption of sodium and water in kidneys to increase BP
- stroke, renal failure, loss of vision, and CAD/cardiac death
- 120/80 normal. 120-129/80 elevated. 130-139/80-89 stage 1.
140+/90+ stage 2.
>180/>120 hypertensive crisis. Go to ER
12
Q
- Name the 5 types of drugs used to treat hypertension:
A
- Diuretics: decreases sodium and blood volume
- ACE Inhibitors: blocks conversion of angio 1 to angio 2 thus blocking vasoconstriction
- Beta-blocker: decreased heart rate and strength of contraction and vasodilation
- Calcium Channel Blocker: relaxes muscle contraction
- Vasodilators: directly acts on vascular smooth muscle to decrease resistance.
- ARBs: block angiotensin II from binding to its receptors in vascular smooth muscle and adrenal glands.
13
Q
- Prototype ACE inhibitor: and their suffixes:
- What dangerous side effect can ACE inhibitors cause?
- Contraindications:
- What race of people is not as responsive to ACE inhibitors?
- Adverse effects (most important in ALL CAPS):
A
- Captopril, Lisinopril. “pril” drugs
- Angioedema. Hyperkalemia. Tachycardia
- pregnancy/lactation, renal impairment
- blacks
- DRY COUGH, dizziness from vasodilation, GI upset, renal insufficiency.
14
Q
- Angiotensin II receptor blocker prototype (ARBs):
- Indication:
- adverse effects:
A
- Losartan “artans”
- alone or as a combo therapy for hypertension especially in type 2 diabetes.
- dizziness, headache, GI upset, couggh, hypotension.
15
Q
- What are the 3 types of calcium channel blockers?
- What is the prototype of calcium channel blockers?
- Indications:
- Contraindications:
- Adverse effects:
A
- Hydropyridines, non-hydropyridines, phenylalkylamines.
- Diltiazem
- Angina (all types) and hypertension. Decreases workload of heart
- heart block, sick sinus syndrome, renal/hepatic, pregnancy, lactation
- dizziness, headache, peripheral edema, bradycardia, atrioventricular block
16
Q
- What are vasodilators reserved for?
- Action:
- Prototype and its indications:
- Name 2 other vasodilators and their indications:
A
- hypertensive emergencies, malignant hypertension.
- causes vasodilation and drop in BP by acting directly on vascular smooth muscle.
- Nitroprusside. Hypertensive crisis and control during surgery
- Hydralazine: maintain increased renal blood flow.
Minoxidil: only for severe and unresponsive hypertension.
17
Q
- Name 2 drugs and their indications that are used for hypotension
- What is the name of the category of drugs used to treat hypotension or shock:
A
- midodrine: orthostatic hypotension in adults.
droxidopa: neurogenic hypotension - Sympathetic Adrenergic Agonists or Vasopressors
18
Q
- What is the general principal of treatment of CHF?
- What are 4 major causes of Congestive Heart Failure?
- Signs and symptoms of L heart failure:
- Signs and symptoms of R heart failure:
A
- Allowing the heart muscle to contract more efficiently to bring system back to balance.
- CAD, Cardiomyopathy, Hypertension, Valvular Heart Disease
- Hypoxia, anxiety, rales, tachypnea, dyspnea, orthopnea, hemoptysis, cardiomegaly, S3, GI pain/upset, decreased peripheral pulses.
- elevated jugular venous pressure, splenomegaly, hepatomegaly, decreased renal perfusion when upright, but opposite when lying down (nocturia), pitting edema, weakness/fatigue.
19
Q
- Prototype cardiac glycoside and its indications
- Action:
- Contraindications:
- ……. ……. must be at least 60bpm to give Digoxin.
- Why must potassium be evaluated?
- What are the signs of Digoxin toxicity?
- Drug to drug
A
- Digoxin, treats heart failure and atrial fibrilation
- increases intracellular calcium in myocardial cells increasing force of contraction.
- conditions that slow heart rate, subaortic stenosis, MI, renal insufficiency, and electrolyte abnormalities
- apical pulse
- low potassium and cause toxicity, but high potassium can cause less potency.
- yellow halos, nausea, and anorexia
- Cardiac Glycosides doesn’t play nice with others. Many drug interactions ie: quinidine, erythromycin, potassium losing diuretics, etc.
7.
20
Q
- 3 Name the 3 big causes of cardiac arrhythmias:
4. Name the types of cardiac arrhythmias:
A
- Altered action potentials from electrolyte imbalances, drugs, acidosis, or waste product buildup
- decreased O2 delivery to cells
- structural damage to heart that alters conduction pathways
- tachycardia, bradycardia, premature atrial or ventricular contractions (PACs) or (PVCs), atrial flutter, atrial or ventricular fibrillation, alterations in conduction (heart blocks or bundle branch blocks).
21
Q
- Describe the 4 classifications of antiarrhythmics:
A
- Class 1: block sodium channels
- Class 2: block beta-receptors
- Class 3: block potassium channels
- Class 4: block calcium channels
22
Q
- Prototype Class 1 Antiarrhythmic:
- Indications:
- adverse reactions:
A
- Lidocaine
- management of ventricular arrhythmias during cardiac surgery or MI
- dizziness, fatigue, cardiac arrest, nausea, vomiting, hypotension
23
Q
- Prototype Class 3 antiarrhythmic:
- Action:
- Indications:
- Cautions:
- Adverse effects:
A
- Amiodarone
- prolongs action potentials by blocking potassium channels
- life threatening ventricular arrhythmias and long term atrial fibrillation stabilization
- shock, hypotension, respiratory depression, prolonged QT, renal or hepatic disease
- dizzness, malaise, heart failure, cardiac arrest, GI, hepatotoxicity, pulmonary toxicity, corneal microdeposits, worsening of arrhythmias
24
Q
- Name 2 other drugs to treat arrhythmias:
2. Nursing considerations for antiarrythmics:
A
- digoxin and Adenosine
- Assess for allergies, heart block, and QT interval prolongations
Labs (electrolytes and renal functions). ECG
Monitor cardiac rhythm.
Teach client to not stop drug too quickly