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39 Cards in this Set
- Front
- Back
What is the hierarchy of nutrition?
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nutrient --> food --> meal --> diet pattern
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What are the lifestyle goals for preventing diabetes?
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- sustained >7% WL.
- <25% of diet = fat - 1200-1800 kcal/day - >150min per week of physical activity. |
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What has shown (in the DPP) to have the larger impact on pt BW, metformin or lifestyle changes?
Risk reduction (...I don't know if this is RRR.... hmmm... take w/ a grain of salt) in incidence of diabetes? |
lifestyle changes, though both were more effective than placebo.
lifestyle (58%) > metformin (31%) |
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Is there a "diabetic diet?"
- what is the primary thing modified to control daily blood G management? |
No.
- total CHO intake. |
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What is the average minimum requirement for CHO daily intake?
- should insulin tx "cover" dietary CHO intake @ meals and snacks? |
130 g/day.
- yes. |
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What is a common insulin:CHO ratio?
- what is one serving of CHO? |
1:15
15grams. |
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What is Glycemic index (GI)?
Glycemic Load (GL)? Are they the bee's knees for diabetic nutrition? |
G excurison due to ingestion of CHO containing food relative to a standard (white bread or oral G)
GI, accounting for total CHO intake. No, they *may* provide a modest benefit over that observed when total CHO is considered alone. ... plus, there are some major problems w/ the index. |
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Is peak blood sugar from a meal typically longer or shorter when the meal is high in fat?
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longer.
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What is the euglycemic diet?
- for what is it indicated? |
- jovanovic diet: goal is to reduce caloric intake to just above the ketonuric threshold; reduce CHO to <40% total cal (min 175g a day); breakfast is small and low in CHO to counter dawn effect.
gestational diabetes. |
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What are the points of MNT that have an "E" consensus?
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minimize transfat intake
<200mg/day cholesterol. <1-2 drinks/day (F-M EtOH) drink w/ dinner to \noct hypoG i/ pts w/ insulin or secretogogues Chromium supplementation is NOT recommended. |
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What is the definition of diabetic ketoacidosis?
- what are some possibilities for arbitrary lvls that might help ya remember how severe these things have to be? |
presence of hyperglycemia, ketosis, and acidosis SIMULTANEOUSLY.
- blood glucose > 250 mg/dL, arterial pH < 7.30, bicarbonate < 15 mmol/L, serum osmolality variable, and moderate ketonemia present |
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Is DKA fatal w/o tx?
What is more common, HyperG hyperosmolar state or DKA? Can DKA be the presenting sx of new onset t1dm? |
yes.
DKA. yes. |
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20 yo WF, type 1 diabetes since age 12
2 days of fever, cough, shortness of breath Blood sugars 200s-300s; usually 70s-160s VS: T 102.1 RR 26 BP 88/50 HR 122 BG 360 mg/dL Na 132, K 5.8, Cl 100, HCO3 12, BUN 24, Cr 1.5; AG = 20; serum/urine ketones (+); arterial pH = 7.1 CXR: RLL pneumonia Wha's goin' on? |
DKA
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68 yo AAM, no history of diabetes
2-week prednisone course for asthma Thirsty, urinating more, blurred vision Wife brings him in for confusion, dizziness VS: BP 80/46 HR 130 “Drowsy” Na 144, K 3.1, Cl 107, HCO3 25, BUN 32, Cr 2.8 BG = 710 mg/dL; AG = 12; serum osm = 327 What's goin' on? |
Hyperglycemic hyperosmolar state (HHS)
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What are some common causes of DKA among pts having established t1dm?
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inadequate or mistakenly missing insulin tx
increased insulin req due to infection or other illness. |
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DKA and HHS are "points along a spectrum."
- Both are caused by what? - what characterizes each? |
- insufficient insulin
- DKA: high BG and acid formation; HHS: v.high BG/Osm and *dehydration.* |
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Dose insulin have acute metabolic effects or slower, mitogenic effects?
- what are the acute metabolic effects, if any? |
both.
- anabolic (promotes creation of large-molecule storage forms of energy); anti-catabolic (prevents breakdown of large-molecule storage forms of energy into fuel). - |
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When insulin is present, energy is converted into storage forms, e.g., glucose --> glycogen, FFA & ketones --> TriG. W/o insulin, what happens?
- what about in DKA? |
The storage forms are broken down i/ a controlled manner in the fasting state.
- this process is unregulated. |
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In whom is DKA typically seen?
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- usually established t1dm, sometimes new onset.
- less common in t2dm - any age - short time presentation; rapid development of sx. |
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High glucagon, GH, cortisol and catecholamines can lead to what re: insulin requirement?
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increased insulin requirement
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What does the unchecked hyperG lead to in DKA? unchecked ketogenesis?
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osmotic diuresis --> dehyrdation --> electrolyte loss
ketosis --> high anion gap metabolic acidosis. |
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What are the body's defense mechanisms against acidosis?
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- ketone bodies are excreted & buffered in the urine; kidney initially regenerates bicarb.
- serum bicarb, bone, and intracellular proteins buffer the H+ ions - acidosis stim hyperV in the lung --> blows off CO2. |
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Can ketones initially be present in the urine and the blood w/o a fall in arterial pH?
- what happens once the characteristic picture is finally seen? |
yes, due to the body's mulitiple defense mechanisms.
- low bicarb, low pCO2, low arterial pH w/ high AG met. acidosis (the unmeasured cations in this case are the ketone bodies) |
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What is the best indicator of DKA severity? How about while tracking treatiment?
Why wouldn't we use bicarb lvls? Why wouldn't we use ketone lvls? |
Anion gap, both cases.
Best indicator of successful treatment [I.e. “closing” or normalization of the anion gap] we tx w/ normal saline for volume expansion --> commonly leads to hyperchloremic acidosis --> may persist after ketoacidosis has cleared. - results in a normal AG acidosis. - thus, closing of the AG is the best sign of recovery. they're estimated by the nitroprusside rxn, which detects only acetone (not an acid) and acetoacetate. i/DKA, B-hydroxybutyrate predominates. Ketone lvls can also be confusing during recovery because the B-hyd gets converted back into acetoacetic acid. |
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Can B-hydroxybutyrate be measured w/o a special meter or a sendout lab?
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no.
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Even though ketones aren't the best marker in DKA, if they're not strongly positive in diluted serum, but the AG is high, what alternative dx should be considered?
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lactate, alcohol, salicylate, renal failure.
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Tachycardia, hypotension, orthostasis, dry mucous mem., poor skin tugor, Kussmaul respirations, fruity breath, and relative hypothermia.... sx of what?
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DKA.
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On history, thirst, polyuria, profound weakness, abdominal pain, and nausea/vomiting... features of what?
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DKA
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What is the definition of HHS?
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hyperG w/ high osmolality
- absent or small ketones and near-normal pH. |
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features of pts presenting with HHS?
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- older
- known t2dm or unrecognized/untx t2dm - longer pre-coma phase than DKA - insidious development - greater severity of obtundation @ presentation - dehydration presenting w/ shock-like state - occasional misdx of stroke. |
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What types of medications can precipitate HHS?
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corticoS, Thiazides, phenytoin.
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What is the pathogenesis of HHS?
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severe hyperG leads to losses of water, Na, Cl, K, and Phosphorus. Clinical dehydration, hyperosmolality, hypotension.
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dehydration, hyperG, hyperNa, hyperosmolality are worse in DKA or HHS?
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HHS.
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The likelihood of obtundation in HHS relates to severity of what?
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severity of hyperG/hyperO; NOT severity of acidosis.
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What treatment differences exist between DKA and HHS?
What can complicate the clinical course of HHS? |
HHS: more free water and greater V replacement; K replacement is REQUIRED.
seizures or vascular thromboses and embolism. |
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What are the elements of tx for HHS and DKA?
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- fluids, including NaCl, eventually free water, eventually G
- IV insulin until AG closes - Postassium - occasionally phosphate |
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Should you give K during tx of DKA and HHS?
What other electrolytes can drop precipitously during tx? |
yes, both.
Life-threatening hypokalemia can develop during insulin treatment Potassium re-enters cells under the influence of insulin therapy The small extracellular compartment experiences a precipitous drop of potassium concentration Anticipatory replacement during treatment of DKA is almost always required phosphorous can, but it's uncommon. |
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Absolute insulin deficiency is associated with (DKA/HHS)?
Relative insulin deficiency? |
DKA
HHS |
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68 yo AAM, no history of diabetes
2-week prednisone course for asthma Thirsty, urinating more, blurred vision Wife brings him in for confusion, dizziness VS: BP 80/46 HR 130 “Drowsy” Na 144, K 3.1, Cl 107, HCO3 25, BUN 32, Cr 2.8 BG = 710 mg/dL; AG = 12; serum osm = 327 - dx? - how should you tx? |
HHS
IV fluids, S Osm <320 by day 2, mentation improved. Aggressive K, Mg replacement. D/c on SQ insulin. Prednisone stopped. Transitioned to orals and diet therapy. |