Exam 2 Review Cards Flashcards
Vasoactive substances: Vasodilators (PDN)
Prostaglandins E and I2
Dopamine
Nictric Oxide
Vasocative Substances: Vasoconstrictors (ATEA)
Angiotensin II
Thromboxane
Endothelin
Adrenergic Stimulation
Types of Acute kidney Failure
Prerenal is ______%, Intra-renal _____% and Post renal _______
70
20-30
10
In pre-renal the BUN/Cr ratio is
> 20 (greater than)
In Intral renal the BUN/Cr ratio is
< 20
The FENA is prenal when it’s _______in adults and _____in infants
<1% in adults and 2.5% in infants
The FENA is renal if it’s __________
2%
Pre-Renal Failure is caused by (LEDD)
Loss of ECF , cardiac failure, sepsis
Diminished perfusion
Decreased GFR
Exacerbated by NSAIDs, ACEI, ARBs
IntraRenal Failure in infants? adults?
Infants = Birth asphyxia, sepsis, cardiac surgery Older= trauma, sepsis, hemolytic uremic syndrome
Pre-Renal AKI can cause intrarenal
AKI
Intrarenal Obstruction can be caused by _______
Acute Glomerulonephritis
Drugs causing intrarena failure (3)
Aminoglycosides
Amphotericin B
Nephrotoxins including radiocontrasts
POST RENAL FAILURE is characterized by
Characterized by SUDDEN ANURIA
POSTRENAL Failure –> Intrarenal cause
Tumor Lysis syndrome
Myoglobinuria
hemoglobinuria
Meds (Acyclovir, ciclofovir)
Ureter failure causes by
Stones
External compression from lymph nodes/ tumor
urethra
Urethra obstruction caused by
BPH , kidney stones, obstructed urinary catheter, Bladder stone, Bladder, Ureter or renal malignancy.
For dialysis know
Input and output from last dialysis
Know dry weight and Actual weight
What should you assess after surgery?
Assess pulmonary function
When should dialysis be?
The day before and NOT THE DAY OFF
Indications for dialysis (VOPS)
Volume overload refratory to DIURETICS
Overt signs of uremia, Pericarditis, and Encephalopathy
Persistent Hyperkalemia
Severe Metabolic Acidosis
When is dialysis recommended?
BUN approaching 100mg/dL
Studies showed 60mg/DL may be better
Peritoneal dialysis ________compared with HD
Less effective compared with HD
Risk of PERITONITIS
What is the primary cause of Metabolic acidosis?
the INABILITY of PROXIMAL RENAL TUBULE to increase AMMONIUM FORMATION
Kidney is unable to form ________in metabolic acidosis?
New bicarbonate
With kidney issues, there is EXCESS
Phosphate
Sulfate
Organic acids
In kidney, there is __________
SECONDARY HYPERPARATHYROIDISM
Hypocalcemia is defined by
Decreased CALCIUM absorption because of deficiency of Vitamin D
Infants are unable to Increase this electrolytes
PHOSPHATE EXCRETION
Do not give to infants ________enema? why?
Phosphate containing enema
Can lead to Life threatening
Phosphate containing enema can cause
HYPERPHOSPHATEMIA + HYPOCALCEMIA
Most common complication of CRF
hypertension
Infants with CRF are at risk for both
Hypertension and Hypotension
Renin activates
Angiotensin I –> Converted to Angitotensisn II –> A powerful vasoconstrictor –> may need more antihypertensive or less
TX of HTN with nicardipine
0.5- 5 mcg/kg/min max 20mg/hr
Pt with chronic HTN have a tendency of _______ you must _______
Tanking BP after induction ; Preload with NS
HTN –> Volume Afterloard
Increase Preload + Afterload
Kidney issues lead to what type of Anemia
Normocytic Normochromic Anemia
Fenoldopam will
Increase GFR without the HTN associated
Fenoldopam is a
dopamine-1 receptor agonist
1st line therapy for Acute HTN dose and (max)
Labetalol 0.1-0.4 mg/kg/hr q 10min Max 40mg
Renal Hormones
Renin, Angiotensin, ANP (vasopressin)
What is serum osmolality tightly regulated by?
Vasopressin (ADH)
ADH is released in response to
INCREASED PLASMA OSMOLALITY
ADH synthesized by
Hypothalamus and stored in posterior pituitary
ADH binds to receptors where? Increasing the ____________
In collecting duct; permeability of the tubules to water and leading to increased water resorption and concentrated urine
Neonates are unable to
Conserve water
Aldosterone binds to receptors on
Cells in the distal nephron , increase the secretion of potassium in the urine
NEONEATES are less efficient at
excreting potassium loads
Acidosis : an increase in K+ by ________meQ for every decrease in pH of ______
- 5mEq
0. 1
Dopamine on GFR
Increases
Dexmetetomedine on GFR
Increases
Fenoldopam on GFR
Increases
Meds requiring excretion are
Hydrophyllic
Highly ionized
Examples of meds needing excretion
PCN Aminoglycosides Cephalosporins Vanco Digoxin
Meds dependent on Renal Elimination
Vec Roc Atropine Glycopyrrolate Neo
Which medication takes longer to work with renal patients
Rocuronium
Meds that do accumulate and HAVE METABOLITES
MORPHINE
MEPEREDINE
Meds that do not accumulate and HAVE NO METABOLITES
Fentanyl
Sulfentanyl
For patients with renal disease, decrease dose by
30-50%
What about reversal Agent –>
SUGAMMADEX
Contraindicated with renal failure
RENALLY SECRETED
No Metabolites with this medication
PRECEDEX
Which medication is renal protective ?
Propofol
The functional unit of the liver is the
Hepatic acinus
The hepatic acinus centered in the
Portal track and extends into 3 concentric zones (zones of Rappaport)
The central zones are _______are more active in _______
1,2 , OXIDATIVE PROCESS
The distal zone is ________ more susceptible to
3, Ischemic and toxic injury
The Hepatic triad is the
Bile duct
Branch of the portal vein
Hepatic artery
Enzymes inhibition is when
Competing for same enzymes
Enzyme inhibitors are (GFQS)
Grapefruit juice
Fluoxetine
Quinidine
Sulfaphenazole
Enzymes induction is when
There is ENHANCED EXPRESSION
Enzymes inducers are (RPP, TCC)
Rifampin Phenytoin Phenobarbital Tobacco smoke Chronic Alcoholism Carbamezapine
What is the most abundant enzymes in the human liver
CYP3A4
50% of drugs metabolized by
CYP3A4
Halothane induced Hepatitis–> Halothane inhibits______
Inhibits PROTEIN SYNTHESIS and SECRETION which is an
Early indicator of HEPATIC cytotoxic injury
Give SEVOFLURANCE
Halothane is broken down to
15-20% to TRIFLUOROACETYL Acid Chloride
What does Increases in liver enzymes indicate
Drug-induced INJURY
Are liver enzymes good indicators of liver function
NO
Indicators of liver functions tests
PT> 15 sec
INR> 1.5
or both
Liver enzymes: ALT vs AST which one specific to Liver
ALT
Other Tests for enzymes
hypoalbuminena
Hypoglycemia
AMS
Clearance
Decrease plasma clearance and prolong effects
Ketamine is metablized via
Methylation
Metabolism of this drugs is minimally affected by liver dysfunction
Ketamine
Pt with liver disorder, best medication to give is
Ketamine