Urinary System Flashcards
urinary system consists of….
two kidneys, two ureters, the urinary bladder, and the urethra
length of male urethra
3-5 inches
length of female urethra
2-3 inches
why is it hard to put in a cath for a male?
prostrate gland
coude
specially designed catheter to help get past prostrate; prostrate disease cancer
metal guide
need dr or someone from anesthia; not used too often; may bleed in urine for one to two days after; helps to get cath around prostrate gland; more invasive; used in males to get past prostrate gland
what is the role of kidneys?
produce urine
urine consists of…
95% water and 5% nitrogenous waste products of protein
what makes up nitrogenous waste of urine?
urea, uric acid, and creatinine
secondary functions of kidney
Erythropoietin (makes red blood cell) production, renin production, and the activation of Vitamin D3
Erythropoietin is produced and released in response to…
decreased oxygen in kidney blood supply which triggers RBC production in bone marrow
Unhealthy kidneys will have reduced erythropoietin production which in turn can make you…
anemic
role of vitamin D
promotes absorption of Ca in GI tract and regulate Ca balance
role of renin
- assists in blood pressure control
- ## anytime the kidneys sense a drop in fluid volume and blood pressure
excess electrolytes eliminated in the urine which include
Na, Ca, K, and phosphates.
why do you look at med doses when there is kidney dysfunction?
metabolism of medicine could be altered; may need to change dose
other functions of kidneys
- Assist the body to regulate blood volume by excreting or conserving water; ADH in endocrine system.
- Regulation of electrolyte balance.
- Regulation of the acid-base balance.
- Regulates the same components in tissue fluid.
where is urine produced?
kidney
how is the urine moved from kidney to bladder?
moved by virtue of peristalsis thru the ureters into the urinary bladder
how full is the bladder when it sends a signal to the spinal cord and brain to empty the bladder?
- 250-300cc’s is a general amount
- Some may have less and some may have more
micturition
expel urine from bladder
where are kidneys located?
retroperitoneal space
what hormone is responsible for producing RBCs?
erythropoietin
how does kidney assist in acid-base balance of the body?
secretes renin
what do you have to worry about when there is surgery on kidneys?
- always a high risk to bleed
- highly vascular in that area
3 parts of kidney
renal cortex, renal medulla and renal pelvis
renal cortex
outer most part of kidney
renal medula
- middle portion
- contains the collecting tubules and the renal pyramids
renal corpuscle
- glomerulus
- bowman’s capsule
glomerulus
a ball-like network of capillaries formed from an arteriole within the Bowman’s capsule
Bowman’s capsule
surrounds the glomerulus
where does Lasix start to work?
loop of henle
where do diuretics work?
ascending/descending loop tubule
Bowman’s capsule is attached to…
a long looped and coiled structure called the renal tubule
where does the blood go from the capillary network that is formed around the tubules?
collected by the venules
most of the contents except for large molecules and large blood cells are…
forced out of the blood from the capillaries of the glomerulus and into the Bowmans capsule
glomerular filtrate
matter that is filtered out of blood
what type of pressure does the capillary system have?
high pressure
what is in the matter that is filtered out of the blood?
water, electrolytes, various toxic substances, and other waste products
how much blood is processed by the kidneys?
400 quarts each day
GFR
changes with age; how well kidneys take on blood and how well it gets rid of unwanted parts and excrete
GFR produces…
about 2 quarts of waste products and extra water as urine
tubular reabsorption
During the process of filtration some of the necessary elements are reabsorbed and returned to circulation
what happens to the filtrate that is not reabsorbed?
is now urine and continues to travel thru the tubules
where does the urine go once it leaves the tubules?
to the collecting ducts and into the pelvis of the kidney and then to the rest of the urinary system
normal output of urine
1000-2000ml in 24 hours
average output of urine
1500 mL in 24 hours
minimum output of urine
30 mL per hour; need this much to have healthy kidney function
should urine be clear?
yes
what is the color range of urine?
pale yellow to amber or straw colored
what color of urine do you want?
pale yellow
what urine color is more dilute?
lighter color
what urine color is more concentrated?
darker color
urine screen
dip sticks; color shows what is wrong with them
who might use a urine screen
Camp counselor and emergency room
can the urine screen test check for ketones?
yes
can the urine screen test check for glucose?
yes
what does cloudy urine indicate?
presence of pus, red blood cells, or bacteria
dark red in urine indicates..
bleeding in the area of the kidney and high in ureter
bright red in urine indicates…
bleeding in the lower urinary tract/bladder and urethra
Interstitial cystitis
infection in walls of bladder; strands appear in urine
dark yellow urine…
may indicate the presence of bilirubin
brown looking urine…
Rhubarb and liver/gallbladder disease
beets make urine look…
bloody
pyridium makes urine look….
blaze orange; used to treat pain, dysuria and spasms
mandelamine makes urine look…
dark brown; made from sterile horse urine
foul smelling urine indicates…
infection
sweet smelling urine indicates…
glucose