Ch 46 potter urinary elimination Flashcards
function of the kidneys, ureters, bladder, and urethra
urinary elimination depends
filter waste products of metabolism from the blood
kidneys
transport urine from the kidneys to the bladder
ureters
holds urine until the volume in the bladder triggers a sensation of urge,
bladder
occurs when the brain gives the bladder permission to empty, the bladder contracts, the urinary sphincter relaxes, and urine leaves the body through the urethra.
Micturition
lie retroperitoneal on either side of the vertebral column behind the peritoneum and against the deep muscles of the back.
kidneys
left kidney is higher than the right because of the
anatomical position of the liver (kidney difference)
, the functional unit of the kidneys, remove waste products from the blood and play a major role in the regulation of fluid and electrolyte balance.
Nephrons
Each nephron contains a cluster of capillaries called the
glomerulus
water, glucose, amino acids, urea, uric acid, creatinine, and major electrolytes. Large proteins and blood cells do not normally filter through the glomerulus.
glomerulus filters
protein (proteinuria) or blood (hematuria) is found in the urine,
glomerular injury is suspected.
Approximately 99% is resorbed into the plasma by the proximal convoluted tubule of the nephron, the loop of Henle, and the distal tubule. The remaining 1% is excreted as urine.
not all glomerular filtrate is excreted as urine
that the delicate balance of fluid and electrolytes is maintained.
resorption process
is 1 to 2 L/day
normal range of urine production
such as fluid intake and body temperature
factors can influence the production of urine
cannot voluntarily control voiding until 18 to 24 months
Children voiding development
may experience a decrease in bladder capacity, increased bladder irritability, and an increased frequency of bladder contractions during bladder filling.
Older adults bladder
increased risk for urinary incontinence because of chronic illnesses and factors that interfere with mobility, cognition, and manual dexterity.
-ability to hold urine between the initial desire to void and an urgent need to void decreases.
Older adults bladder
can decrease the desire for urinary continence.
Depression impact on bladder
fluids, electrolytes, and solutes are balanced, increased fluid intake
increases urine production.
decreases the release of antidiuretic hormones, thus increasing urine production.
Alcohol impact on bladder
Arthritis, Parkinson’s disease, dementia, and chronic pain
syndromes can interfere with timely access to a toilet.
Diabetes mellitus, multiple sclerosis, and stroke can
conditions alter bladder contractility and the ability to sense bladder filling
can cause the loss of urine control because of bladder overactivity and impaired coordination between the contracting bladder and urinary sphincter
Spinal cord injury or intervertebral disk disease (above S1)