Lecture 6 Urinary incontinence Flashcards
The _ is also referred to as the “pelvic floor muscle”.
Pubococcygeal muscle.
Urge incontinence
- Involuntary urinary leakage due to the inability to hold urine long enough to reach a toilet after perceiving the urge to void.
- Results from detrusor instability or unstable bladder; the bladder muscles contract involuntarily during filling.
- Also known as overactive bladder.
Functional incontinence
- Urination due to the inability to reach an appropriate toileting facility.
- More likely to be an acute condition - barriers to the toilet, mobility limitations, restraints, etc.
Stress incontinence
- Leakage of urine as a result of an activity that increases abdominal pressure.
- Most common type of incontinence in younger women.
Mixed incontinence
The involuntary leakage of urine with both the sensation of urgency and activities such as coughing, sneezing, and exertion.
The detrusor motor area in the _ controls bladder function by directing micturition centers to initiate or to delay voiding depending on the social situation.
Cerebral cortex.
Pons micturition center
- Located in the brainstem - provides for automatic coordinated voiding (urethral sphincter opens before bladder contracts) in response to bladder filling.
- If the cerebral cortex (detrusor motor area) is damaged, voiding still occurs due to the action of the pons.
Sympathetic pathways and bladder function
- Tighten the bladder neck and relax the bladder muscle (detrusor).
- Contribute to urine storage and promote continence.
- Sympathomimetic agents such as pseudoephedrine, SNRIs, and anticholinergics cause urinary retention.
Parasympathetic pathways and bladder function
- Trigger release of neurotransmitters that cause the bladder to contract (acetylcholine).
- Even if all cortical and pontine control is lost, parasympathetic fibers in the sacral cord will still stimulate “reflex voiding.”
Anticholinergic drugs such as _ are commonly used to reduce urgency and frequency and promote continence.
Oxybutynin (Ditropan).
The _, located at the outlet of the urethra, provides for voluntary role of the urethral sphincter muscle.
Pudendal nerve. (Teaching Kegel exercises will be ineffective for patients with damage to this nerve.)
Nocturia
- Getting up at least 2 times during the night to urinate.
2. The consequence of normal age-related increases in urinary output at night.
Age-related changes affecting urinary function
- Increased production of urine at night.
- Reduced bladder capacity.
- Reduced strength of bladder contractions.
- Increased irritability of the detrusor muscle.
- Delayed recognition of bladder filling.
- Benign prostatic hyperplasia (BPH) in males; loss in estrogen in females.
- Effects of reduced mobility and multiple medications.
Symptoms of BPH include _
Hesitancy, poor urinary stream, prolonged urination time, incomplete emptying, and post-void dribbling.
Patients with tumors, kidney stones, or other potentially serious conditions should be _
Referred to the appropriate specialist for further evaluation.