Urinary Elimination Flashcards
The function of the kidneys is to
remove waste from the blood to form urine
The function of the ureters is to
transport urine from the kidneys to the bladder
The function of the bladder is to
Serve as a reservoir for urine until the urge to urinate develops
The function of the urethra is to
transport urine from the bladder to the urethral meatus and exit the body.
Additional functions of the kidneys are
- production of erythropoietin (essential for maintaining RBC volume)
- Production of renin, prostaglandin E2, and prostacyclin affecting blood pressure
- Kidneys affect calcium and phosphate regulation
What does renin do?
starts a chain reaction that causes water retention, thereby increasing blood volume
What does prostaglandin E2 and prostacyclin do?
aids vasodilation
Normal urination patterns are
60 mL per hour or 1500 mL per day
range 1000-2000 mL
if less than 30 mL then get Trina/intervene
Most people void 5-6 times per day
Specific gravity is the best indicator for …
hydration
Developmental factors of newborns and children r/t urination
newborns produces between 15 and 60 mL/kg and may urinate up to 25 times per day for the first 24 hrs gradually declining to 8-10 diapers per day
their normal sp. gravity is 1.008
Toilet training varies but is usually accomplished between 3 and 5 years
Bedwetting should not be concerning until after age 6
Developmental factors of the elderly r/t urination
kidney fx decreases with age
filtration rate declines and dilution and concentration of urine is impaired
Risks for drug toxicity, acid-base and electrolyte balances
Bladder volume decreases
Increases frequency of urination
Name examples of personal, sociocultural, and environmental factors r/t urination
Lack of time
Lack of privacy
Loss of dignity
Cultural differences
Name some substances that can increase urine production
coffee, tea, cola, chocolate and other caffeine laden products
alcohol (impairs production of ADH)
Name substances/activities that can decrease urine production
high salt diet
Dehydration
Exercise - causing temporary dehydration
How do medications affect urination?
Depends on the med
Diuretics increase elimination
Some medications cause urinary retention
Some cause damage to kidneys (nephrotoxic)