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118 Cards in this Set
- Front
- Back
% of body weight that is water
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60%
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Most Na- extra or intra cellular?
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extracellular
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Most K- extra or intra cellular?
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intracellular
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Daily intake requirement for most adults
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at least 2000 mL
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Sources of water intake
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75% oral and 25% extracted from solid food
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Routes for loss of fluid (3)
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urine output, insensible loss (sweating and lungs), GI tract
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If fluid replacement is done orally, how much is given in comparison to IV fluids?
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1.5 times
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How much urine output is needed to clear products of metabolism?
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500-800 mL
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What is normal urine output?
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1 liter per day
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What is “insensible” fluid loss?
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sweating from skin (both water and electrolytes) and lungs (pure water)
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Amount of fluid lost daily through the GI tract
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about 250 mL/day
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Amount of fluid lost daily through insensible loss?
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about 600 mL
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General reasons for giving IV fluids.
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resuscitation (blood loss or dehydration) and hydration (post op, unable to eat/drink)
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How long can a patient be with IV fluids alone when unable to eat?
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a week
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What is enteral nutrition?
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through GI tract
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What is TPN?
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total parenteral nutrition through central line
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What is PPN?
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peripheral parenteral nutrition
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Fluid that best mimics extracellular fluid.
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Lactated Ringer’s
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Percent of NaCl in Normal Saline
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0.90%
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Composition of D5 1/2 NS
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dextrose 5% in .45% NaCl
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Composition of D5 1/4 NS
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dextrose 5% in .225 NaCl
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Composition of D5W
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dextrose 5% in Water
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Composition of D50W
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dextrose 50% in Water
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Only fluid that contains in normal blood except for Mg
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Lactated Ringer’s
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What is the use for crystalloids?
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volume resuscitation
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What two fluids are used for volume resuscitation?
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NS and LR
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Which fluid used for volume resuscitation contains K, HCO3 and Ca?
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LR
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Fluid most commonly used for maintenance in adults?
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D5 1/2 NS
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If an adult needs fluid maintenance and also has been vomiting or on NG suction, what fluid is used?
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D5 1/2 NS with added 20 meq KCl/L
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What fluid is usually used for maintenance?
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classically D5 1/4 NS
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If you use D5W for resuscitation or maintenance, what will result (bad)?
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low serum sodium leading to lethargy and then seizure or coma
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Time for blood typing and then crossmatching.
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Few minutes for blood type and about 1 hour to crossmatch
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What is the best replacement for active hemorrhage?
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Whole blood because it has RBC and plasma (clotting factors)
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Why is there more immunologic reaction from whole blood than RBCs?
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WBC
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How much does one unit of RBC raise the Hct?
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3%
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What is normally used for replacement of blood due to the lack of whole blood available?
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PRBC
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Temperature whole blood and RBC should be before being used.
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warm
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Whole blood and RBC should be hung with what fluid?
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NS
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How many people are required to check patient ID and blood ID before transfusion?
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2
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When is FFP used?
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for coag deficiency plus active bleeding (not for volume replacement alone)
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How long does it take FFP to thaw?
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about 30 minutes
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How long can you keep thawed FFP for?
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about 5 days
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Normal platelet count
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over 200,000
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When are platelets given?
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when the platelet count is less than 50,000 and patient is bleeding
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A 6 pack of platelets can increase the platelet count by how much?
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as much as 25,000
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Describe storage of platelets
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stored at room temp and good for 5 days
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Lethal triad.
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hypothermia, coagulopathy, and metabolic acidosis
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Ratio of RBC to FFP that should be used in trauma requiring massive transfusion.
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1:01 AM
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There is an increased risk of this condition with 1:1 RBC:FFP
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ARDS
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What is albumin used for?
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volume expansion and albumin deficiency (due to burns, liver disease, nephrotic syndrome)
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What is the purpose of hypertonic saline (3-5% NaCl) in hemorrhage?
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to reduce the volume of fluids to maintain BP---the high Na concentration will draw fluid into the intravascular space
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Purpose of hypertonic solution in head injury?
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increases BP and CPP, and decreases ICP
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Why is there less risk of ARDS with use of hypertonic solution for head injury than albumin?
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inhibits PMN activation
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What does hypertonic solution do to tissue swelling?
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decreases it b/c it draws the interstitial fluid into the intravascular space
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Negative S.E. caused by use of hypertonic saline.
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hypernatremia----thirst
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IV maintenance rate for 10 Kg child
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40 ml/hr
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IV maintenance rate for 20 kg child
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60 ml/hr
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IV maintenance rate for 30 kg child
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70 ml/hr
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In a dehydrated or hypovolemic child, what size fluid bolus can you start with?
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20 ml/kg NS or RL (can repeat)
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IV maintenance rate for adults
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100 ml/hr or more
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Size of fluid bolus to use in dehydrated or hypovolemic adult
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500 mL to 1 L NS or RL (repeated PRN)
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KVO
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Keep Vein Open
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TKO
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To Keep Open
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Use for heparin or saline lock
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for intermittent meds
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How do you keep saline or heparin lock line from clotting?
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irrigate periodically
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NPO
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nil per os (nothing by mouth)
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2 general reasons why patient needs IV fluids at least maintenance rate.
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NPO for more than 12 hours or if there are continuing fluid losses
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Most common method for fluids.
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Peripheral line
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Use for butterfly
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to draw blood or give meds
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Site for intra osseous needle insertion in child
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tibia and femur
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Site for intra osseous needle insertion in adult
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tibia, sternum, humerus
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Contraindication for intra osseous
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fracture- causes compartment syndrome when the fluid leaks out of bone into the soft tissue
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Two vein locations MC used for central line
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subclavian and IJ catheter
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What is a PIC?
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peripherally inserted central line
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What are central lines used for?
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to administer fluids, blood, antibiotics, and hyperalimentation (TPN)
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Common complications of central lines
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pneumothorax, hematoma, infection
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What is the Seldinger technique?
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wire is inserted through needle and the needle then pulled out of vein leaving the wire; catheter is threaded over the wire and the wire pulled out leaving the catheter in place
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What is a tunneled catheter?
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central line with ports out of the skin that is used for hyperalimentation, chemo, and long term Ab
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What is implanted catheter?
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reservoir is completely under the skin and a special curved needed is used to access the reservoir
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What complication is avoided by using a PICC?
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pneumothorax
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Drawback to PICC
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more easily infected, can break off, embolize, cause air embolus
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Complications of femoral vein catheter
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infection and DVT
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Is the femoral vein medial or lateral to the artery?
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medial to the artery
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How many umbilical veins are in the umbilical cord?
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one
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How many umbilical arteries are in the umbilical cord?
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two
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Where is arterial line usually inserted?
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radial artery
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What are arterial lines connected to?
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pressure transducer (they are nor fluid replacement)
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What is the purpose of a blood filter when giving blood?
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to catch clots
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Low tech way to know if someone is dehydrated?
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skin turgor, HR, BP, tilts
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Medium tech ways to know if someone has enough fluid?
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hematocrit, measure I and O, urine specific gravity
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Is specific gravity of urine increased or decreased when dehydrated?
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increased when dehydrated
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Higher tech ways to determine is there is enough fluid?
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CVP, wedge pressure
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What signs on physical exam will tell you that a patient needs less than maintenance fluids?
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pedal or presacral edema, ascites, anasarca, S3 gallop, JVD
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Clues in history that tell you a person has volume excess
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fluid retention or weight gain over past few days, symptoms of CHF
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Clues in history that tell you a person has volume deficit
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vomiting, diarrhea, fever, profuse sweating, thirst, weight loss in past few days
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Physical exam signs that tell you a patient may have volume deficit?
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skin turgor, mucosal hydration , tachycardia, orthostatic hypotension, oliguria
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How do you treat oliguria in a person with volume deficit?
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with fluids, not a diuretic
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What is the Hematocrit a measure of?
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% of RBC in blood compared to plasma
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If there is no loss or gain of RBC and you add fluids, what happens to the hematocrit?
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it decreases (hemodilution)
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If there is no loss or gain of RBC and you lose fluids, what happens to the hematocrit?
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it increases (called hemoconcentration--dehydration)
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Hemolyzed blood may have high serum what?
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K
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What is seen on EKG because of hyperkalemia?
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peaked T waves and eventually PVCs
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What is low urine output in surgery patient considered as until proven otherwise?
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hypovolemia
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What urine output should be expected post surgery from an adult?
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.5 ml/kg/hr
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What urine output should be expected post surgery from a child?
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expect 1 ml/kg/hr
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What urine output should be expected post surgery from an infant?
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expect 2 ml/kg/hr
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Too ways to measure urine output?
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hat in toilet, collection bag from bladder catheter
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Where does the CVP line end?
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in SVC or right atrium
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If CVP and wedge pressure are low when measuring with Swan-Ganz, what is the patient’s fluid status?
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Probably needs more fluid
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What is the pulmonary artery catheter measuring?
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CVP, PA pressure, wedge pressure, and CO
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Purpose of feeding tube vs. NG tube
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Feeding tube to insert feeding; NG tube on low suction to drain the stomach
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What is the purpose of letting tube feedings drain in with gravity rather than pushing them in?
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minimizes aspiration
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Contraindication for NG tube
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nasal injury, nasal obstruction, cribriform plate injury
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Indication for NG tube
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persistent vomiting, bowel obstruction, surgery
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Function of Toomey Syringe
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inject air into the NG tube and sump to keep open
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What is Anti-reflux valve used for?
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used on sump with NG tube to keep fluid from leaking out while allowing air to go in
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Common causes of hypokalemia
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diuretics and NG suction (loss of HCl from stomach)
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How do you prevent hypokalemia?
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Add KCl to each liter of fluids
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