Week 13: Chp 66: Benign Prostatic Hyperplasia Flashcards
(42 cards)
What is Benign Prostatic Hyperplasia
an enlarged prostate
-not a form of cancer; can have BPH and prostate cancer simultaneously or independently of each other
Primary control of the prostate gland
assist in controlling urine flow
- also mixes sperm with prostatic fluid and seminal fluid to be ejaculated during orgasm
- around the age of 25, the prostate begins to grow
The clinical manifestations of BPH
related to lower urinary tract symptoms (LUTS)
- difficulty starting the flow of urine even with straining
- a weak stream of urine
- multiple interruptions during urination
- dribbling once urination is complete
Symptoms related to changes in the bladder include?
urgency, frequency, the feeling that the bladder has not completely emptied after urination, and frequent awakening at night to urinate
As the bladder becomes more sensitive to the retention of urine, what might result?
incontinence
-the patient may experience bet-wetting and the inability to respond quickly enough to the need to urinate
A urethral obstruction or enlarged prostate that is left untreated may result in?
bladder outlet obstruction (BOO)
-includes acute urinary retention (AUR), bladder infection, bladder stones, and increasing pressure in the kidney, possibly resulting in hydronephrosis or postrenal acute kidney injury (AKI) or pyelonephritis
Diagnostic Tests
- digital rectal examination (DRE)
- Urinalysis
- prostate-specific antigen (PSA)
Digital rectal examination (DRE)
diagnosis of BPH is confirmed with DRE
-the enlarged prostate can be palpated on examination
Urinalysis: Why?
is done to rule out the presence of an infection causing symptoms
Prostate-specific antigen (PSA)
is a protein produced by the prostate gland and may be considered a tumor marker
- elevated PSA may be indicative of prostate cancer
- elevated PSA levels are also indicative of infection (PSA levels do not distinguish between cancer and BPH)
Complications of BPH
- Acute urinary retention
- UTI
- Bladder stones
- Bladder damage
- Kidney damage
Complications: acute urinary retention
blockage of urethra by enlarged prostate, obstructing urine flow; causing AUR
Complications: UTI
secondary to urinary stasis
Complications: Bladder stones
crystallization of mineral deposits in concentrated urine due to obstructed urine flow
Complications: Bladder damage
stretching and weakening of the bladder wall muscles from incomplete emptying, resulting in the bladder no longer contracting properly
Complications: Kidney damage
increased pressure in the kidney secondary to urinary retention and backflow of urine, causing hydronephrosis (swelling of urine-collecting structures in the kidney) and postrenal AKI
-pyelonephritis- UTI migrating from the bladder to the kidney
Pharmacological management
- 5-alpha reductase inhibitor
- alpha-adrenergic blockers
- if has an overactive bladder, an anticholinergic is added such as oxybutynin to relax bladder smooth muscle
Medications: alpha-adrenergic blockers
alpha blockers act on the alpha receptors in the prostate, causing smooth muscles of the prostate to relax
- relaxation of these muscles decreases the constriction of the urethra
- takes 2 weeks to 4 months to notice symptom improvement
- adverse effects: headache, nasal congestion, dizziness, drowsiness, postural hypotension, reflex tachycardia, and retrograde or delayed ejaculation
Adverse effects of alpha-adrenergic blockers
headache, nasal congestion, dizziness, drowsiness, postural hypotension, reflex tachycardia, and retrograde or delayed ejaculation
Medications: 5-alpha reductase inhibitors
act as antiandrogens
- 5-alpha reductase converts testosterone into DHT; Dihydrotestosterone stimulates the growth factors that encourage prostate hyperplasia while concurrently reducing the rate of cell death in the prostate; this imbalance results in enlargement of the prostate
- 5-alpha reductase inhibitors prevent testosterone from being converted to DHT, which causes enlarged tissues to shrink, thus reducing obstruction of the urethra
- take 3 to 6 months to take effect
- does not affect levels of circulating testosterone; reduces the chance of erectile dysfunction
- adverse effects: rash, breast enlargement, breast tenderness, reduced volume of ejaculate, decreased libido, ED
- reduction in male -pattern baldness
Adverse effects in 5-alpha reductase inhibitors
rash, breast enlargement, breast tenderness, reduced volume of ejaculate, decreased libido, and erectile dysfunction (ED)
What can be added to the medication regimen if the patient with BPH has an overactive bladder?
an anticholinergic to relax smooth muscle, such as oxybutynin, may be added
Alternative Therapies if medication is not an effective treatment and is not a surgical candidate?
- intermittent catheterization
- indwelling urinary catheter
- saw palmetto (Serenoa repens), African plum (Pygeum africanum), Cernilton, and South African star grass (Hypoxis rooperi and some species of Pinus and Picea)
Alternative Therapies: Indwelling catheter: how long can it stay?
can stay in place and be changed monthly per protocol