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Chapter 12
Chronic Kidney Disease and Dialysis
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03/06/2013

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Term
What can progressive kidney disease lead to?
Definition
reduced renal function, with effects on multiple organ systems
Term
What are some Potential manifestations?
Definition
anemia, abnormal bleeding, electrolyte and fluid imbalance, hypertension, drug intolerance, and skeletal abnormalities that can affect the delivery of dental care
Term
What is chronic kidney disease(CKD)?
Definition
a progressive loss of renal function that persists for 3 months or longer, results from direct damage to nephrons
Term
What can CKD result in?
Definition
-uremia
-kidney failure
-death
Term
What are the stages of CKD based on?
Definition
a five–stage classification system for CKD based on the glomerular filtration rate (GFR)
Term
Stage 1
Definition
characterized by normal or only slightly increased GFR associated with some degree of kidney damage
Term
Stage 2
Definition
is marked by a mildly decreased GFR
Term
Stage 3
Definition
is evidenced as a moderately decreased GFR, with loss of 50% or more of normal renal function
Term
Stage 4
Definition
defined by a severely decreased GFR
Term
Stage 5
Definition
reflected by renal failure, wherein 75% of more of the approximately 2 million nephrons have lost functi
Term
What happens in stages 2-5?
Definition
nitrogen products accumulate in the blood, and the kidneys perform fewer excretory, endocrine, and metabolic functions, with eventual loss of the ability to maintain normal homeostasis
Term
Are stages 1-3 symptomatic?
Definition
no, tend to be asymptomatic
Term
What is end stage renal disease(ESRD) caused by?
Definition
conditions that destroy nephrons
Term
What are the 4 most common causes of ESRD?
Definition
1.diabetes mellitus (37%) 2.hypertension (24%)
3.chronic glomerulonephritis (16%) 4.polycystic kidney disease (4.5%)
Term
What are the underlying pathologic processes for renal failure?
Definition
Deterioration and destruction of functioning nephrons
Term
Normal function is maintained until how many of the nephrons re destroyed?
Definition
more than 50%
Term
Will someone with early renal failure have symptoms?
Definition
not usually
Term
Patients with advanced renal disease develop what?
Definition
uremia, which is uniformly fatal if not treated(drop in urine output, this can cause hypertension from fluid retention)
Term
What is azotemia?
Definition
The buildup of nonprotein nitrogen compounds in the blood, mainly urea, as a consequence of loss of glomerular function
-measured as blood urea nitrogen(BUN)
Term
What can ESRD cause?
Definition
acidosis which can cause sepsis
Term
What are some hematologic abnormalities that people with ESRD exhibit?
Definition
anemia, leukocyte and platelet dysfunction, and coagulopathy
Term
What is host defense compromised by?
Definition
nutritional deficiencies, leukocyte dysfunction, depressed cellular immunity, and hypogammaglobulinemia
Term
What is Hemorrhagic diatheses characterized by?
Definition
tendency toward abnormal bleeding and bruising
-common with ESRD
Term
What is the cardiovascular system is affected by with ESRD?
Definition
athero- and arteriosclerosis and arterial hypertension, the latter due to sodium chloride (NaCl) retention, fluid overload, and inappropriately high renin levels
Term
What is renal osteodystrophy?
Definition
variety of bone disorders seen with ESRD
Term
What are the symptoms seen after stage 3 of CKD?
Definition
-general ill feeling, fatigue, headaches, nausea, loss of appetite, and weight loss
-With further progression, anemia, leg cramps, insomnia, and nocturia often develop
-The anemia produces pallor of the skin and mucous membranes and contributes to the symptoms of lethargy and dizziness
Term
Hyperpigmentation of the skin is characterized by...
Definition
a brownish-yellow appearance, caused by the retention of carotene-like pigments normally excreted by the kidney
Term
What is uremic frost?
Definition
a whitish coating on the skin of the trunk and arms, produced by residual urea crystals left when perspiration evaporates
Term
What tests are used to monitor disease progress?
Definition
GFR, urinalysis, BUN, serum creatinine, creatinine clearance, electrolyte measurements, and protein electrophoresis
Term
What is the most basic test of kidney function?
Definition
urinanalysis
Term
What is the principal marker of kidney damage?
Definition
persistant protein in urine
Term
The serum creatinine level is a measure of...
Definition
muscle breakdown and filtration capacity of the nephron
Term
The patient with renal failure remains asymptomatic until...
Definition
the GFR drops to below 20 mL/minute, the creatinine clearance drops to below 20 mL/minute, and the BUN is above 20 mg/dL
Term
What does conservative care involve?
Definition
decreasing the retention of nitrogenous waste products and controlling hypertension, fluids, and electrolyte imbalances (dietary modifications)
Term
What are corrected or controlled during the earliest stage possible?
Definition
Comorbid conditions, such as diabetes, hypertension, congestive heart failure, and hyperparathyroidism
Term
When are Anemia, malnutrition, and bone disease (e.g., hyperparathyroidism) typically managed?
Definition
in stage 3
Term
What happens in stage 4? 5?
Definition
4-care by a nephrologist is recommended, and preparations for renal replacement therapy begin
5-dialysis is started
Term
What are the two types of peritoneal dialysis?
Definition
-continuous cyclic peritoneal dialysis (CCPD)
-chronic ambulatory peritoneal dialysis (CAPD)
Term
CCPD
Definition
also known as automated peritoneal dialysis (APD), uses a machine to perform three to five dialysate exchanges while the patient sleeps
Term
CAPD
Definition
exchanges are performed manually
Term
What are the advantages of peritoneal dialysis?
Definition
relatively low initial cost, ease of performance, reduced likelihood of infectious disease transmission, and absence of requirement for anticoagulation
Term
Who is periteral dialysis mainly used on?
Definition
in patients in acute renal failure or in those who require only occasional dialysis
Term
What type of dialysis do most patients recieve?
Definition
hemodialysis
Term
Hemodialysis
Definition
-Treatments are performed every 2 or 3 days, and usually 3 to 4 hours is required for each session
-a permanent and surgically created arteriovenous graft or fistula, usually placed in the forearm
-Patients are “plugged in” to the hemodialysis machine at the fistula or graft site, and blood is passed through the machine, filtered, and returned to the patient
Term
What is typically administered during hemodialysis to precent clotting?
Definition
heparin
Term
Dialysis provides what percent renal function?
Definition
15%
Term
What are those who revieve dialysis at risk for?
Definition
of hepatitis B, hepatitis C, and human immunodeficiency virus (HIV) infections
Term
What can happen to the arteriovenous fistula?
Definition
can beome infected with something like staph auerus
Term
Patients with ESRD have bleeding caused by a decrease in which type of platelet?
Definition
platelet factor 3
Term
What is an alternative of dialysis?
Definition
kidney transplant
Term
Patients with diabetes and hypertension should be screened for what?
Definition
chronic kidney disease
Term
When is med con suggested?
Definition
CKD stage 4 or higher
Term
What should be closly monitored during and before the procedure?
Definition
blood pressure
Term
Large doses of corticosteriods may lead to what?
Definition
adrenal insufficency
Term
main concern for ESRD is?
Definition
toxic effects on kidney from medications due to dental problems
Term
What are some ways that drugs can be effected with ESRD?
Definition
-A low serum albumin value reduces the number of binding sites for circulating drugs, thereby enhancing drug effects
-Uremia can modify hepatic metabolism of drugs (increasing or decreasing clearance)
-Antacids can affect acid-base of electrolyte balance
-Larger initial doses may be required in the presence of substantial edema or ascites, whereas smaller initial doses may be required if dehydration or severe debilitation is present
-Aspirin and other NSAIDs potentiate uremic platelet defects
Term
What should be measured before intravenous sedation to ensure adequate oxygenation?
Definition
Although nitrous oxide and diazepam are antianxiety agents that require little modification for use in patients with ESRD, the hematocrit or hemoglobin concentration should be measured
Term
Why are drugs that supress the CNS best avoided in the presence of uremia?
Definition
uremia because the blood-brain barrier may not be intact, excessive sedation may result
Term
What is a common oral sign of chronic renal failure?
Definition
pallor of the oral mucosa related to anemia
Term
What may be present in severe renal failure?
Definition
uremic stomatitis may be present
Term
What are some oral lesions seen with chronic renal failure?
Definition
-Oral mucosa lesions, including ulcers, lichen planus or lichenoid-like lesions
-hairy tongue
-hairy leukoplakia
-pyogenic granulomas
Term
May some tooth specific changes be seen with ESRD as well?
Definition
yes such as enamel hypoplasia
Term
What else may accompany chronic renal failure?
Definition
Specific osseous changes of the jaws
-The most classically described osseous change is the triad of loss of lamina dura, demineralized bone (resulting in a “ground glass” appearance), and localized radiolucent jaw lesions (central giant cell granulomas also called brown tumors), the last from secondary hyperparathyroidism
Term
CCB's and cyclosporine and pheytoin may cause what?
Definition
gingival overgrowth
Term
Peritoneal dialysis presents...
Definition
no additional problems in dental management
Term
What may the fistula for hemodialysis cause?
Definition
infective endocarditis
Term
What conditions are common in patients receiving dialysis?
Definition
Comorbid conditions such as cardiovascular disease and diabetes
Term
treatment modifications need to be used in dialysis patients to avoid what?
Definition
excessive bleeding
Term
Patients dependent on long term dialysis are prone to what?
Definition
infection(like Tb)
Term
What may dialysis to do drugs?
Definition
shorten their effect because it cleans them out
Term
Hemodialysis reverses what?
Definition
many of the severe oral pathologic changes associated with ESRD
Term
Patients with a transplanted kidney may have what?
Definition
special management needs, including the need for corticosteroids or antibiotic prophylaxis and the need for management of oral infection and gingival overgrowth caused by cyclosporine therapy
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