HLTH 2501: renal failure and male reproduction Flashcards
reasons why the kidneys may fail to function
reduced blood flow to the kidneys, inflammation, necrosis, and obstruction
what is the result of kidney failure
oliguria or anuria
oliguria
reduced urine output
anuria
no urine output
what is the treatment for kidney failure?
dialysis
causes of acute renal failure
glomerulonephritis, shock, heart failure, nephrotoxins, and mechanical obstructions
how does glomerulonephritis cause acute renal failure?
it reduces GFR
shock and heart failure leading to acute kidney failure
this results in tubule necrosis; shock from burns or injuries can also cause this by causing damaged RBCs or myoblin that break down in the circulation and damage the tubules
nephrotoxins
are drugs, chemicals, or toxins that cause tubule necrosis and obstruction of blood flow
drugs that may cause tubule damage
sulfa drugs, phenacetin, NSAIDS, acetaminophen, aspirin, and penicillin
what may cause obstructions in the kidneys?
calculi, blood clots, or tumors
serum levels of acute renal failure
blood tests will show elevated serum urea nitrogen, creatinine, hyperkalemia, and metabolic acidosis
chronic renal failure
is the gradual, irreversible destruction of the kidneys over a long period
what may chronic renal failure result from?
chronic kidney disease like congenital polycystic kidney disease or systemic disorders like diabetes or hypertension; nephrotoxins may also have an effect
why is chronic renal failure irreversible?
because of scar tissue
stages of chronic renal failure
begins with decreased renal reserve and GFR and high serum creatinine levels; then the second stage is renal insufficiency and a continued retention of nitrogen wastes, which is marked by excretion of large volumes of dilute urine; the final stage if end-stage renal failure and GFR is negligible, causing fluid, electrolytes and wastes to be retained in the body
3 stages of chronic renal failure simple
decreased reserve, renal insufficiency, and end-stage renal failure (uremia)
decreased reserve signs
is pretty much asymptomatic but there is decreased GFR and higher than normal creatinine levels
renal insufficiency signs
continued decreasing GFR, retention of nitrogenous wastes (urea and creatinine), large amounts of dilute urine, and elevated BP
early signs of chronic renal failure
increased urinary output (polyuria) and nocturia, general signs of anorexia, nausea, anemia, fatigue, and weight loss, bone marrow depression, and high BP
end-stage chronic renal failure signs
oliguria, dry-pruritic-hyperpigmented skin that bruises easily, abnormal limb sensations, decreased libido in men and menstrual irregularities in women, encephalopathy, CHG, arrhythmias, bone impact, urine-like breath, and systemic infections like pneumonia
why are systemic infections common with chronic renal failure?
due to poor tissue resistance caused by anemia, fluid retention and low protein levels
encephalopathy signs
lethargy, memory lapses, seizures, tremors
how is bone impacted in end-stage renal failure?
the failure of the kidney to activate vitamin D impacts calcium absorption and metabolism, leading to hypocalcemia and hyperphostehtamia with osteodystrophy, osteoporosis and tetany
osteodystrophy
is a deficit of bone development due to impaired calcium and phosphate metabolism
3 key indicators of chronic renal failure
anemia, acidosis, and azoemia
serum levels for end-stage chronic renal failure
low pH due to metabolic acidosis, azotemia, low hemoglobin, and hyponatremia, hyperkalaemia, hypocalcemia, and hyperphosphatemia
azotemia
refers to the presence of urea or other excess nitrogen wastes in the blood
goal of treatment for chronic renal failure
all body systems are affected so maintaining homeostasis of fluids, electrolytes, and acid-base balance is important
treatment for chronic renal failure
drugs to stimulate erythropoiesis and reduce phosphate levels, as well as for other disorders like hypertension; reducing fluid intake and transplants
risk for children with chronic renal failure
retarded growth and renal rickets
scrotum
a sac outside the abdominal cavity that houses the testes; consists of a layer of skin that is continuous with the skin or the perineal area, plus an inner muscle layer and fascia
spermatic cord
refers to a collection of vessels, nerves, and the ducts (vas deferens) surrounded by a fascia
testes function
produce sperm and the sex hormone testosterone
tunica vaginalis
is a double-walled membrane with a small amount of fluid between the layers and this encloses the testis and attached epididymis
why are the testes located outside the abdominal cavity?
to maintain an optimal temperature for sperm production, 1-2 degrees below normal body temperature
what happens to the testes when the external temperature drops?
the scrotal muscle draws them closer to the body; vise versa for increased temperature
spermatogenesis
is the production of spermatozoa and is a continuous process that takes about 60-70 days
steps of spermatogenesis
sperm goes from the seminiferous tubules, to the epididymis, then peristaltic movements assist the sperm to move into the ductus deferens then to the ampulla, where the now-motile sperm may be stored for several weeks until ejaculation occurs
epididymis
is where the sperm mature
vasectomy
is a method of birth control that involves cutting or obstructing the vas deferens to block the passage of sperm
seminal vesicles
are located behind the bladder and provide a secretion that includes fructose to nourish the sperm
prostate gland
surrounds the urethra at the base on the bladder and adds an alkaline fluid to provide an optimum pH of around 6 for fertilization
other name for the bulbourethral glands
cowper gland
bulbourethral glands
are situated near the base on the penis and secrete an alkaline mucus, which probably neutralizes any residual urine in the urethra
what does FSH do?
initiates spermatogenesis
what do LH do?
stimulates testosterone production by interstitial cells (Leydig cells) in the testes
what hormone is essential for the maturation of sperm?
testesterone