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61 Cards in this Set

  • Front
  • Back

Cardiac Output

HR X Stroke Volume

Preload

Fluid in the heart

Afterload

Resistance of impedance the ventricle must overcome to eject it blood volume

INOTROPY

Contractility

Autonomic regulation of Blood Pressure

Parasympathetic (ACh) vagus decreases in HR


Sympathetic (B1) input NE


SA node in to increase HR

3 Primary factors that determine the resistance to blood flow

* Radius of blood vessels


* Length of blood vessel


* Viscosity of blood

What has the greatest effect of on Blood pressure?

Blood Vessle Diameter

True or False Vessle diameter has the largest impact on Blood pressure?

True

True or False, Diuretics decrease BP?

Yes

Diuretics

Decrease Blood Volume this Decreases BP

What drugs act on Proximal Convoluted Tubules

* Carbonic Anhydrase Inhibitor


*Osmotic Diuretics

What drugs are used in Descending LOH

Osmotic Diuretics

Drugs for Ascending LOH

Loop Diuretics

Drugs for Distal Convoluted Tubule

Thiazides

Where do Thiazides act in the kidney?

Distal Convoluted Tubule

Collecting Tubule and Duct

K sparring diuretics

Diuretics

Most diuretics are renal ion inhibitors


**They block reabsorption of ions thus causing them to pull water into the urine**


-reduce BV


-reduce BP

Carbonic Anhydrase inhibitors

MOA- inhibit Carbonic Anhydrase which


**Proximal Tubule**

T or F are carbonic anhydrase inhibitors considered weak diuretics

True, because it works early in the Nephron!


THESE CAN BE COMBINED WITH LOOP THIAZIDES

Carbonic Anhydrase inhibitors drugs

- Acetazolamide (Diamox)


- Methazolamide (Neptazane)

CAI Theraputic uses

-Glaucoma


* Decreases AH prouction


- Psudotumor Cerebri


* decrease Cerebral Spinal Fluid

True or False, Diamox is a good treatment for Glaucoma?

True Diamox or Acetazolamide, is a CAI that is used for Glaucoma

Oral Hypotensive doses

* generally a low start dose for Glaucoma (125-250mg)


***For psudotumor Cerebri the starting dose is generally much higher 500mg BID



True or False, CAI are a good treatment for Metabolic Alkalosis

True!!


remember Acetazolamide causes the blood to have increased CO2 so itll make it more acidic

Contraindications of CAI

- Metabolic Acidosis


- Hypokalemia (you excrete K)

Osmotic Diuretics

**In the thin Descending Loop of Henle


-Mannitol


-Urea

True or False, Osmotic Diuretics stay in Renal Tubule?

True


**Osmotic Diuretics stay in Tubule and prevent reabsorption of water

What do Osmotic Diuretics Do?

They prevent the reabsorption of water

What are some examples of osmotic diuretics?

Mannitol and Urea

Is Acetaszolamide a Osmotic diuretic?

No it is a CAI

MOA for Osmotic Diuretics

Adds Mannitol to the urine causing an Osmolarity shift without having to use Na pumps.

True or false Osmotic Diuretics are reliant on Na Channels?

False, they add Mannitol in the urine which cant be reabsorbed thus causing the osmotic gradient to shift

Theraputic uses for Mannitol

-Administered prophylactically for acute renal failure , CVD and nephrotic drugs


* Short term Tx for Glaucoma


*can lower Intracranial pressure

Side effects of Osmotics

*fluid and electrolyte imbalances


* dehydration


*Glycerol can cause Hyperglycemia in DM pts

LOOP DIURETICS (SOO MUCH PISS)

***FUROSIMIDE (LASIX)***



Furosemide is acts on what part of the Nephron?

Thick Ascending Loop of Henle

MOA of Loop Diuretics

Block the Na and K Co-transporter which increases the Salts and H20 in urine

What do Loop Diuretics do?

they block the Na, Cl and K pump from the urine to the cell causing salts to stay in the urine and draw more water

Theraputic uses for Loop Diuretics

REDUCE BLOOD PRESSURE


-Acute Pulmonary edema


-Hypercalcemia and HyperKalemia

How do Loop diuretics treat Hypercalcemia and Hyperkalemia?

Loop diuretics cuase K and Ca to stay in the urine and get pissed away

Adverse effects of Loop diuretics

*Ototoxicity


*gout due to Furosemide binding to uric acid transporters thus reducing uric acid secretion


*acute hypovolemia and BP


*Metabolic alkalosis


*Hyperglycemia (not enough K to bind to insulin )



Thiazides

****FIRST LINE OF DEFENSE*****


-Low ceiling diuretic (low dose does nothing)


*Chlorothiazide


* Hydrochlorothiazide

Where do Thiazides act?

Distal convoluted tubule


**remember this is where 25%of Na is exchanged

What is the MOA of thiazides medications?

Block reabsorption of Na/Cl in n the distal tubules thus letting Na and Cl pass into the collecting ducts which water will follow

True or false, Thiazide medications are a high ceiling diuretic that act in the distal convoluted tubules and block Na and Cl reabsorption?

False, Thiazides are a low ceiling medications which means even at high doses, you wont get a high response

Full MOA of Thiazides

Blocks Na Cl cotransporter. this decreases the amount of Na in the cell causing Na K pump to slow down and cause Na to be pumped into the blood in exchange for Ca. Then Ca will be pumped into the urine


* INCREASES BLOOD Ca*

Thiazides effects

*can cause Vasodilation

Thiazide theraputic uses

**Decreases blood volume and vasodilation


-enhances ACE inhibitors


**Hypercalciuria- Increases the amount of Ca in the blood

Side Effects of thiazides

* hypercalcemia


* hyperuricemia (increases Uric acid in the blood)


* Increase Plasma lipids


***REMEMBER THESE ARE SULFA DRUGS SO THEY SHOULD NEVER BE GIVEN TO A PT WITH SULFA ALLERGIES****

Where can thiazides be excreted?

Breast milk



Hypovolemia could be caused from what medication?


A. Mannitol


B. Thiazide


C Acetazolamide


D. Furosemide

B. Thiazide


remember Thiazides act on the Distal Convoluted tubules thus causing vasodilation and increases blood Ca with osteoporosis



Thiazide like medications

*Chlorothalidone


* metazolone




- Metozalone can cause Na secretion even in advanced renal failure

Potassium Sparing Diuretics


** Aldosterone Antagonists**

Spironolactone



Aldosterone antagonists

*reduce production/activity of na/k Channels


-basically increases Na in urine and decreases Na absorption


***EFFECTS ENDOCRINE


-These have a low efficacy to mobilize Na from the body

d

d

What is the MOA of CAI

They inhibit carbonic Anhydrase **remember carbonic Anhydrase pumps Na in and H- out. The H- in the urine combines with HCO3 and gets transported into the cell Lumen


This increases urine pH and keeps Na in urine thus pulling water into the urine **BLOOD ACIDOSIS***

True or False, Carbonic Anhydrase pumps Na into the Urine and H- into the urine?

False, Carbonic Anhydrase pumps Na into lumen and H- into Urine which then binds to HCO3

What drug is a Carbonic Anhydrase inhibitor? And which portion of the Kidney does it effect?

Acetlyzolamide, This Acts on the Proximal convoluted Tubule

True or False Carbonic Anhydrase inhibitors can lead to blood Acidosis

True

Theraputic uses for CAI

*Glaucoma- decreases AH production


*Psudotumor Cerebri

D

D