Definition Flashcards
Functions of the urinary system
1) excretes waste products via urine
2) filters the blood
3) maintains blood pH
4) maintains hemostasis
5) maintains proper balance of water
Excretory
The act or process of excreting, eliminating wastes
Excretion
Is performed by the kidneys, which are part of the urinary system.
Urin/ary
Urinary
Urine/pertaining to
Means pertaining to urine
urinary tract
The organs and ducts that are involved in the secretion and (elimination) of urine from the body
Urinary system
Consists of paired, kidneys, one on each side of the spinal column, a ureter for each kidney, a bladder, and a urethra
most of the work of the urinary system takes place in the kidneys
Kidneys
Filtering occurs
Are located in the dorsal (backside ) part of the abdomen.
Urine is formed in the kidneys
When blood is filtered by the kidneys, wastes are removed, but much of the water, and other substances are reabsorbed. They enter the renal vein and are returned to the bloodstream via the inferior vena cava.
average adult kidney is about 11 cm long by 6 cm wide (4 1/2 x 2 1/3“) and weighs about 145 g about 8 oz (less than half a pound). Playing a major role in hemostasis of the body, the kidneys are the major regulators of the water and pH of the blood and indirectly, all body fluids.
The kidneys, help degrade, insulin and metabolize vitamin D.
Ureter
2 qnty
Carries urine to the bladder
Urine leaves the kidneys by the way of the ureter and passes to the bladder where it is stored
Bladder
Where urine is temporarily stored
Is a temporary reservoir for the urine until it is expelled
Urine comes from the kidneys to the bladder
Urethra
Where urine is excreted
A tube that carries urine from the bladder
When voluntary control is removed, urine is expelled through the urethra
urethra is about 3 cm long in women and lies anterior to the vagina. In men it is 20 cm long and serves as a passageway for semen and as a canal for urine.
Flow of urine
Goes from the kidneys
To the ureters
To the urinary bladder
To the urethra
Urinary meatus where urine is expelled
Urinary meatus
The external opening of the urethra
Renal arteries
Blood is transported to the kidneys by vessels from the cardiovascular (pertaining to the heart and vessel ) system. These vessels that carry blood to the kidneys are _____ ________.
hilum
The match, or depression on the inner border of the kidney, call the Hilum, is where the blood vessels, lymphatics, and nerves, enter, or leave the kidney. 
Renal pelvis
The funnel shaped structure, where a kidney joins the ureter is called the _____ ______, and it drains urine from the kidney to the ureter.
The cavity in the kidney that collects urine from many collecting ducks
Fibrous capsule
Where each kidney is encased
provides protection for the delicate internal parts of the kidney
Ribs and muscle near the kidneys are added protection
Erythropietin
A certain old kidney functions are production of _____________ (causes the production of red blood cells (RBCs), renin (helps regulate blood pressure), and prostaglandins (act in several target organs with a variety of effects)
renin
Helps regulate blood pressure
prostaglandins
Act in several target organs with a variety of effects
any other group of components derived from unsaturated 20 – carbon fatty acids. They are extremely potent mediators of a diverse group of physiologic processes.
Vesical
Pertaining to fluid filled sac, usually a urinary bladder
vesico/ureter/al
vesicoureteral
ureterovesical
Means pertaining to the urinary bladder and ureter
Vesico/vaginal
Means pertaining to the urinary bladder and the vagina
urethr/al
urethral
means pertaining to the urethra
cyst/ic
cystic
bladder/pertaining to
or
fluid filled sac/pertaining to
adomino/cyst/ic
abdominocystic
adomino/vesic/al
adominovesical
abdomen/bladder or fluid, filled sac/pertaining to
extra/cyst/ic
extracystic
outside/bladder or fluid filled sac/pertaining to
inter/ren/al
interrenal
between/kidney/pertaining to
genito/urin/ary GU
genitourinary
uro/genit/al
urogenital
organs of reproduction/urine/pertaining to
urine/organs of reproduction/pertaining to
recto/urethr/al
rectourethral
urethro/rect/al
urethrorectal
rectum/urethra/pertaining to
urethra/rectum/pertaining to
ren/al
renal
kidney/pertaining to
pertaining to the kidney
supra/ren/al
suprarenal
above/kidney/pertaining to
pertaining to above a kidney
ureter/al
ureteral
ureter/ pertaining to
pertaining to a ureter
urethro/vagin/al
urethrovaginal
urethra/vagina/pertaining to
pertaining to the urethra in the vagina
nephrons
About 1 million nephrons serve as the functional units of each kidney.
A nephron consists of a renal corpuscle and a renal tubules.
glomerulus
tubules
nephron’s components
Nephons have three important functions
glomerular filtration
tubular reabsorption
tubular secretion
these functions depend on a healthy blood pressure, and the ultimate goal is to filter the blood and excrete water and waste into the urine.
1) glomerular filtration
2) Bowman capsule
1) The glomerulus allows water, salts, wastes, and practically everything except blood cells and proteins to pass through the filter.
2) Collects the filtrate and passes it to the tubules Collects the filtrate and passes it to the two bowls.
tubular reabsorption
Is fluid passes through the tubules, substances that the body conserves, such as sugar, and much of the water, are reabsorbed into blood vessels surrounding the tubules.
tubular secretion
third process in urine formation
as fluid passes through the renal tubule, some substances from the bloodstream (waste products of metabolism in certain drugs, such as penicillin) are secreted into the tubule to be expelled into urine.
Is the secretion of some substances from the bloodstream into the renal tubule (waste products of metabolism that become toxic if they are not excreted and certain drugs, such as penicillin)
Tubule
Each tubule consists of a proximal tubule, a loop of Henle, and a distal tubal.
reabsorption occurs in these structures
Proximal tubule
Is the part of the tubule near the glomerulus?
distal tubule
Is the part of the tubule that is farther from the glomerulus than the proximal tubule.
Functions of the nephron
glomerular filtration
tubular reabsorption
tubular secretion
glomerular filtration
(water, sugar, salt, and waste passed through the glomerulus
Tubular reabsorption
(water, sugar, from salts and vitamins)
tubular secretion
(Includes hydrogen, potassium, and some drugs)
Adult kidneys
Normal blood flow through the adult kidneys averages 1200 mL/minute, so all of the blood is filtered about every five minutes. Dependent on adequate blood pressure, the kidneys balance the amount of many substances through filtration, selective tubular reabsorption, and secretion.
glomerulus
Filtering occurs in this part of the nephron
Filtering structure of the kidney
tubule
Reabsorption occurs in this part of the nephron
Urine
Substances that are filtered by the glomerulus
- substances that are reabsorbed
+ substances that are added by tubular secretion
= urine
Waste products, and some of the water remaining in the tubules, after reabsorption combined to become____
antidiuretic hormone (ADH)
increases the reabsorption of water by the renal tubules, plus decreasing the amount of urine produce. ADH is secreted by the brain and released as needed.
Renal pelvis
After urine collects in the renal pelvis, it drains to the bladder by passing through a tube called the ureter.
urinary bladder
It’s a collapsible muscular bag that serves as a reservoir for urine until it is expelled. It has a storage capacity in health of about 500 mL ( 1 pint) or more.
micturition
voiding
Means urination, expelling urine from the bladder
Receptors
Filling of the bladder, with urine, stimulates, receptors, producing the desire to urinate
Voluntary control
Prevents urine from being released. When the control is removed, urine is expelled through the urethra.
glomerular filtration rate (GFR)
Is a calculated volume of fluid filtered by the glomeruli.
GFR decreases with advancing age, and the decline in the filtration rate is more rapid in persons with diabetes or hypertension (elevated blood pressure)
GFR formed the basis of a test for how well the kidneys are functioning.
Forming and expelling urine
starts at the bloodstream——proceeds to either kidney—glomerulus (filtration)—bowman capsule—-renal tubule—renal pelvis—ureters(R or L)—bladder—urethra—expelled
Kidneys, your readers, & bladder (KUB)
Physical assessment
Includes abdomen inspection, auscultation, palpitation, and percussion
Laboratory, test, biopsies, radiography, and endoscopy are helpful in diagnostic assessment of the urinary system
Intake and output (I&O)
Intake should include oral, intravenous, and tube feedings. A major source of fluid output is urine, but other output to record includes excess perspiration, vomitus, and diarrhea.
urin/alysis
urinalysis
Is an examination of urine. It is often abbreviated UA or U/A.
Is usually part of a physical examination.
Urine color
Changes in the color may result from diet or medicine
Dark, red or brown may indicate blood
Specific gravity
In urinalysis
Is the density of year and compared with the density of water? (1.0)
Dilute urine has a low specific, gravity, and concentrated urine has a high specific gravity.
urinometer
is an instrument for measuring specific gravity of urine (concentration)
Instrument to measure the specific gravity of urine
Specific gravity can be measured with…
Is used to determine the specific gravity (density) of a sample of urine
Chemical analysis of urine
May include pH (potential of hydrogen; the numeric pH value indicates the relative concentration of hydrogen ions in a solution)
Glucose test strips
Such as Diastix (R)
Tests only for glucose in the urine
Waste products that are normally excreted in urine
Urea, a nitrogen compounds that is the final product of protein metabolism
Ammonia
Creatinine, a nitrogen product produced by the body’s normal metabolism
Various salts
Urea
A nitrogen compounds that is the final product of protein metabolism
Creatinine
A nitrogen product produced by the body’s normal metabolism
Multistix
(testing urine with this)
A plastic strip with reagent areas for testing various chemical constituents that may be present in the urine. These reagent strips are considered qualitative tests, and a positive result for an abnormal substance in the urine generally requires further testing.
Glucose test strips
Screen for the presence of glucose in the urine
These substances are not found in normal urine specimens
Sugar, ketones, albumin, and hemolyzed blood (must rule out menstrual contamination)
Albumin
Is a proteins found in animal tissue and the major serum protein
When present in urine protein is generally _________
Ketones
Normal products of lipid metabolism
Are end products of the body’s normal lipid (fat) metabolism; however, excessive production of ketones leads to excretion of ketones in the urine (abnormal).
Ketoacidosis
An accumulation of ketones in the body.
Ketone excretion in urine sometimes indicates____________, acidosis, resulting from faulty carbohydrate metabolism and accumulation of ketones in the body, primarily a complication of diabetes mellitus.
albumin/uria
albuminuria
Albumin/urine or urination
Albumin (protein) in the urine
glycos/uria
glycosuria
Is presence of sugar in urine
sugar/urine or urination
Sugar in the urine
May indicate diabetes and requires further testing
hemat/uria
Hematuria
Blood/urine or urination
Blood in the urine
keton/uria
ketonuria
bodies/urine or urination
Ketones in the urine
protein/uria
proteinuria
protein/urine or urination
Protein in the urine, which is usually albumin
Abnormal findings in urine
Albuminuria
glycosuria
Hematuria
Ketoneuria
Proteinuria
Glucose
Is absorbed in the tubules, glucose is not normally present in urine.
Glycosuria may indicate diabetes and requires further testing
Renal threshold
When the blood glucose rises above a certain level, the renal threshold for reabsorption is exceeded, and glucose is excreted in the urine.
Microscopic study
Is generally part of a complex urinalysis. Body cells (for example, squamous epithelial cells, blood cells), crystals, and bacteria are some of the particles present in a microscopic study. These are generally reported as number/high - power field (HPF)
pus cells
Neurotic WBCs, are a major component of pus.
Py/uria
otitis
Means the presence of pus in the urine
Healthy urine sample
Contains a few squamous epithelial cells and very few white blood cells. (WBC)
White blood cells (WBCs)
The presence of a large number of white blood cells may be indicated of an infectious or inflammatory process somewhere in the urinary tract. For example, there is usually a large amount of WBC’s/HPF in most urinary tract infections.
Red blood cells (RBCs)
Only a few RBCs are normally present in urine. If several RBCs/HPF are present it may indicate a variety of abnormalities, including a tumor, urinary stones, infection, or a bleeding disorder.
Urinary cast
Are gelatinous structure that take the shape of the renal tubules. Casts are described by the type of element in the structure. There are usually few to no casts, so the presence of several cast in urine generally indicates renal disease or urinary calculi. Renal disease means disease of a kidney.
Renal disease
Means disease of the kidney
Urinary tract infection
The presence of many bacteria may indicate a UTI.
A urine culture
If the patient has symptoms of a UTI, the urine culture is used to determine the types of pathogenic bacteria present
Antibiotics, sensitivity test
When bacteria are present in significant numbers. Another test is used to determine which antibiotics are effective against that particular pathogen.
Culture
The cultivation of micro organisms in the laboratory on special culture medium is
Voided specimen
Is one in which the patient boys into a container supplied by the laboratory or physicians office
Clean-catch specimen
The tissue adjacent to the urethra meatus must be cleansed before collection to avoid contamination of the specimen, and only the middle portion of the urine stream is collected.
Catheterized urine specimen
Introduced a hollow, flexible tube into the bladder
Is obtained by placing a catheter into the bladder and withdrawing urine. This may be necessary to obtain an uncontaminated urine specimen.
Creatinine
Is a substance formed in normal metabolism, and is commonly found in blood, urine, and muscle tissue.
It is measured in blood in urine as an indicator of kidney function.
serum creatinine test
Is a measurement of the creatinine level in blood.
creatinine clearance test
Is a diagnostic test that measures the rate at which creatinine is cleared from the blood by the kidney
This kidney function test is one example of a renal clearance test
Reno clearance test
Determine the efficiency with which the kidneys, excrete particular substances
24 hour urine collection
This type of collection may be ordered to measure levels of various substances in the urine, such as calcium or creatinine
Blood urea nitrogen (BUN)
In addition to blood creatinine levels, it is directly related to the metabolic function of the liver and the excretory function of the kidney.
BUN is a measure of the amount of urea in the blood
urea forms in the liver as the end product of the protein metabolism and is excreted by the kidneys in urine
A critically elevated bun level indicates serious impairment of renal function
Blood urea nitrogen
BUN, a blood test that measures the excretory function of the kidney
Pyuria
Puss in the urine
Ketonuria
Presence of the end products of fat metabolism in the urine
Urinary catheterization
A catheter (flexible tube ) is inserted through the urethra and into the bladder for temporary or permanent drainage of urine.
Catheter
The hollow tube that is used in catheterization
Indwelling catheter
It is designed to be left in place for a prolonged period
Foley catheter
Is held securely in place by a balloon tip that is filled with a sterile liquid after the catheter has been placed in the bladder.
This type of catheter is used when continuous drainage of the bladder is desired, such as in surgery, or when repeated urinary catheterization would be necessary if an indwelling catheter were not used.
Ureteral catheters
Placement of catheters through the urethra into a ureter is________ ________
Are usually passed into the distal ends of the ureters from the bladder, via a cystoscope and may be threaded up the ureters into the renal pelves (plural for pelvis). Ureteral catheter may also be surgically inserted through the abdominal wall into a ureter.
Retrograde urogram
Retrograde pyelogram
Ureteral catheters may be placed temporarily as part of a diagnostic procedure called_______________, which permits visualization of the renal collecting system in patients whose renal function is to limited for adequate visualization with intravenous urography.
Four methods of catheterization used to divert the regular flow of urine
Urethral catheterization
Ureteral catheterization
Suprapubic catheterization
nephrostomy or percutaneous nephrostomy
Urethral catheterization
Insertion of a catheter via the urethra into the bladder
Ureteral catheterization
Insertion of the catheter into the distal ends of the ureters, usually via the urethra into the bladder, then, into the ureters using a cystoscope; may also be surgically inserted through the abdominal wall.
Suprapubic catheter association
Surgical incision of a catheter through the skin above the pubic arch and into the bladder
1) Nephrostomy also called
2) percutaneous nephrostomy
1) Surgical insertion of a catheter via a new opening into the renal pelvis through the overlying skin.
2) the catheter is inserted on a temporary basis when it complete obstruction of the ureter is present
Urodynamic studies
Measure various aspects of the process of voiding and are used along with other procedures to evaluate problems with urine flow
Types of urodynamic studies
Cystometrography
Electromyography
Urethral pressure profile
Cysto/metro/graphy
Cystometrography
bladder/to measure/process of recording
provides information about the amount of pressure exerted on the bladder wall.
A urologic procedure that measures the amount of pressure on the bladder
Cysto/meter
Cystometer
Bladder/instrument that measures
Measures bladder capacity in relation to change in urine pressure
Is an instrument that measures aspects of the bladder
Electro/myo/graphy (EMG)
Electromyography
Electricity/muscle/process of recording
Can be used to evaluate the strength of the muscles used when voiding
Electric recording of muscle action, contraction
This test can also be used to evaluate urinary incontinence, the ability to control urination
Perineal muscles
Used in voiding