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33 Cards in this Set
- Front
- Back
How much of the body is composed of fluid?
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60%
-2/3 of that is found within the cells and is known as Intracellular Fluid. -1/3 of that lies outside the cells and is called Extracellular Fluid. |
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What are the 3 types of Extracellular Fluid and where are they found?
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1.INTERSTITIAL FLUID-surrounds the cell and is outside of the blood vessels.
2.TRANSCELLULAR FLUID-includes *cerebral spinal fluid, *synovial fluid, *lymph fluid, *intraocular fluid. 3.INTRAVASCULAR FLUID-fluid containted within the blood vessels as Plasma. |
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Define Tonicity:
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Tonicity: the ability of a solution to initiate water movement. Depends on the solutes present and their ablity to pass through a membrane. There are 3 types:
1.Isotonic 2.Hypotonic 3.Hypertonic |
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Tonicity: 3 types
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1.ISOTONIC-fluid where normal cells will not shrink or swell. (Ex: 0.9% NaCI and LRS)
2.HYPOTONIC-fluid that causes cells to swell (water moves into the cell) (Ex: 2.5% Dextrose solution) 3.HYPERTONIC-fluid that causes cells to shrink (water moves out of the cell and into the solution) (Ex:7% NaCI) |
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What are Electrolytes?
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Electrolytes: compounds that are formed by ions and remain as a solution. They are responsible for the alkalinity or acidity of a solution.
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What are the 2 Electrolytes Routinely measured in Fluid Therapy?
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1. SODIUM
2. POTASSIUM |
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What are the Normal Values for SODIUM and where is it most commonly found?
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SODIUM normal value:
140 meq/dL -Most abundant EXTRACELLULAR ion present! -attracts water -responsible for determining extracellular fluid volume |
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Name 4 ways other than dehydration that animals can lose sodium from their bodies:
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1.Urinary loss
2.G.I. loss 3.3rd Space loss 4.Cutaneous loss |
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What are the Normal Values for POTASSIUM and where is it most commonly found?
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POTASSIUM normal value:
3.5 to 5.0 meq/dL -Primary INTRACELLULAR ion! -responsible for generating electrical impulses in muscles & nerves. -changes in plasma alter nerve and cardiac function. |
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What is the Maximum Rate of POTASSIUM supplementation in fluids?
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Max Potassium Supplementation in fluids:
0.5 meq/kg/hr *device called Sliding Scale of Scott determines values for potassium supplementation. **NEVER give the undiluted form of potassium directly into an animals circulation, will cause CARDIAC ARREST! NEVER IV....Must be put into bag! |
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What is Acid-Base Balance?
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Acid-Base Balance: refers to the regulation of hydrogen ion concentration in body fluid (pH)
**Normal pH of Arterial blood is 7.4 |
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What is ACIDOSIS?
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-Acidosis: LOW BLOOD pH that corresponds to HIGH levels of Hydrogen ion.
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What is ALKALOSIS?
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-Alkalosis: HIGH BLOOD pH that corresponds to LOW levels of Hydogen ion.
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How do you maintain body fluid volume in an animal?
(maintenance fluid requirements) |
An animals daily intake of fluid must equal the sum of Sensible and Insensible Losses.
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What are SENSIBLE WATER Losses, and how much is lost?
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Sensible Water Losses:
-Lost through URINE- 10mL/lb/day -Lost through FECES- 3-5mL/lb/day |
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What are INSENSIBLE WATER Losses, and how much is lost?
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Insensible Water Losses:
-Lost through RESPIRATIONS -Lost through TRANSCUTANEOUS losses Total from Both= 7.5mL/lb/day |
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What is the amount needed for MAINTENANCE of Normal Body Fluid per day?
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Maintenance Fluids:
30 mL/lb/day |
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What are the Stages of DEHYDRATION?
What happens at each Stage? |
Degree of Dehydration:
-less than 5%: not detectable -6-7%: mild loss of skin elasticity -8-9%: obvious delay in tented skin,slight prolonged CRT,dry/tacky mm's,eyes little sunk 10-12%:(Cats are at 10% if any dehydration is detected!)skin remains tented,very prolonged CRT, sunken eyes in orbits, dry mm's, possible signs of shock -13-15%:obvious signs of shock, Death Imminent :( |
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What is the amount needed for REPLACEMENT fluids?
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*Remember, 1L=1kg, so for every kg of body weight the animal has lost it has also lost 1L of fluid.
Replacement Fluids: % of dehydration X body weight(kg) X 1000 (% x kg x 1000) *daily fluid requirements: replacement volume + maintenance volume |
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Define Dehydration:
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Dehydration: reduced total body water w/ preservation of vascular volume.
(replace slowly as not to over expand the vascular space) |
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Define Hypovolemia and Shock:
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Hypovolemia/Shock: reduced intravascular volume (which can impair cardiac output).
(must rapidly replace fluids in order to re-expand the intravascular volume. |
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What are the Signs of Hypovolemia and Shock?
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Signs of Hypovolemia/Shock:
-weakness -CRT longer than 3 seconds -pale mm's -low body temp. |
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What are the Hypovolemia/Shock dose of fluids?
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Hypovolemia/Shock fluid dose:
*these considerations should always be considered in any Trauma Patient! -Require fluid replacement at: 60 mL/kg/hr (emergency fluid) |
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What is a COLLOID?
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Colloid: fluid product that contains large molecular weight molecules that remain in the vascular space until they are degraded by the body.
-they are used to increase oncotic pressure -Can be used in Shock Situations! |
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What is the Most Commonly used COLLOID?
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HETASTARCH most common used product
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What rate is COLLOID administered at?
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-The Flow Rate is up to 20mL/kg/day IV over whole day, or can be given over 30 min. for DOGS.
CATS flow rate: 15mL/kg slowly for 20-30 minutes. |
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What is the Electronic Infusion Pump Rate Method?
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Electronic Infusion Pump Method: involves the use of an electronic infusion pump, a bag of fluids, and an IV drip set.
(calculated by machine @ ml/hr) |
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Common Solutions
Lactated Ringer Solution LRS Characteristics: |
LRS: this is used for most maintenance situations
-lactate helps prevent and treat metabolic acidosis. -provides normal level of potassium to prevent hypokalemia from vomiting, lack of daily intake, etc |
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Common Solutions
Normal Saline (0.9% NaCI) Characteristics: |
Normal Saline (o.9% NaCI):
-an isotonic fluid -most commonly used in animals who need a normal osmotic solution w/o potassium, like hyperkalemic |
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Common Solutions
LRS with 5% Dextrose or 0.45% NaCI with 5% Dextrose Characteristics: |
LRS w/ 5% Dextrose or 0.45% NaCI w/ 5% Dextrose:
-used in animals that need a sourse of Dextrose to maintain blood sugar levels, like hypoglycemic |
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Common Solutions
Fluid Supplements-Dextrose 50% Characteristics: |
Fluid Supplements-Dextrose 50%:
-used to add Dextrose to any fluid (up to 5%) -Potassium Chloride: very common additive (use Sliding Scale of Scott to determine amount to add) |
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What are Constant Rate of Infusions?
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Constant Rate of Infusions: drugs that are administered as an infusion (usually placed in a bag of fluids) and are given continuously over a set period of time. (pain meds, electrolytes, anti-sezure meds, and antibiotics are commonly given as constant infusion)
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In order to determine how much of a drug needs to be added to a bag of fluids, what 5 key pieces of information do we need to know?
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5 key pieces of info to know how much drug to add to a bag of fluid:
1.rate at which fluids are being administered 2.drug name and dose 3.drug concentration 4.patient weight 5.size of fluid bag being used |