Urinary incontinence and renal disorders
Incontinence
Types of urinary incontinence and treatment
Urinary incontinence is the involuntary loss of urine due to dysfunction in the bladder, urethra, or pelvic floor muscles. There are several types, each with different causes and treatments.
Stress incontinence
Cause
- Weak pelvic floor muscles or urethral sphincter dysfunction
- Common in postpartum women, postmenopausal women, and after prostate surgery in men
- Triggered by increased intra-abdominal pressure (e.g., coughing, sneezing, laughing, jumping)
Treatment
- Pelvic floor muscle training (Kegels) to strengthen muscles
- Bladder training to improve control
- Biofeedback & electrical stimulation for muscle activation
- Pessary (Vaginal) or urethral inserts (in some cases to support and hold pelvic organs in place)
- Surgical options (e.g., sling procedures) for severe cases
Urge incontinence
Cause
- Detrusor muscle overactivity leads to sudden, strong urges to urinate
- Can be related to neurological conditions (e.g., stroke, Parkinson’s, MS), infections, or idiopathic causes
Treatment
- Bladder retraining (scheduled voiding, delaying urination)
- Pelvic floor exercises to control urgency
- Behavioral modifications (reducing caffeine, alcohol, and bladder irritants)
- Medications (anticholinergics, beta-3 agonists) to relax the bladder
- Neuromodulation (e.g., tibial nerve stimulation) in severe cases
Overflow incontinence
Cause
- Incomplete bladder emptying due to obstruction (e.g., enlarged prostate, pelvic organ prolapse) or weak detrusor muscle (e.g., diabetes, spinal cord injury, multiple sclerosis)
- Symptoms include dribbling, a weak stream, and a feeling of incomplete emptying
Treatment
- Double voiding technique (waiting and trying to urinate again)
- Timed voiding to prevent overflow
- Pelvic floor strengthening does not treat overflow incontinence, because it neither relieves an obstruction nor strengthens a weak detrusor; if a pelvic floor that fails to relax is impeding emptying, pelvic floor relaxation training (often with biofeedback) is used instead
- Catheterization (intermittent or long-term) for severe cases
- Surgical intervention if caused by obstruction (e.g., prostate surgery)
Functional incontinence
Cause
- Physical, structural, or cognitive impairments (e.g., stroke, dementia, arthritis, Parkinson’s, steps to bathroom, physical obstacles) prevent timely access to the bathroom
- No direct bladder dysfunction, but mobility limitations or mental impairments lead to accidents
Treatment
- Environmental modifications (accessible bathrooms, commodes, grab bars)
- Scheduled toileting based on routine
- Mobility training & assistive devices
- Caregiver education for dementia-related cases
The following table compares the four types of urinary incontinence by cause, presentation, and first-line physical therapy management.
| Type | Cause | Presentation | First-line PT management |
|---|---|---|---|
| Stress | Weak pelvic floor muscles or urethral sphincter | Leakage with coughing, sneezing, laughing, or jumping | Pelvic floor muscle training (Kegels), biofeedback |
| Urge | Detrusor overactivity | Sudden, strong urge; leakage before reaching the toilet | Bladder retraining (scheduled voiding, delaying urination), behavioral modification |
| Overflow | Obstruction or a weak detrusor, so the bladder does not empty | Dribbling, weak stream, feeling of incomplete emptying | Double and timed voiding, catheterization when needed; not pelvic floor strengthening |
| Functional | Mobility or cognitive barriers; the bladder itself works | Accidents because the toilet cannot be reached in time | Environmental modification, scheduled toileting, mobility training |
Renal disorders
Common renal disorders
The kidneys play a vital role in filtering waste, regulating electrolytes, and maintaining fluid balance. Dysfunction can lead to serious systemic issues, including metabolic imbalances and cardiovascular complications.
Acute kidney injury (AKI)
Definition: Sudden loss of kidney function due to ischemia, toxins, or trauma. It is often reversible if treated early.
Causes:
- Pre-renal: Hypovolemia, shock, heart failure.
- Intra-renal: Acute tubular necrosis, nephrotoxic drugs, infections
- Post-renal: Obstruction (kidney stones, tumors, BPH)
Signs and symptoms:
- Oliguria (low urine output), fluid retention, electrolyte imbalances (increased potassium, increased BUN/creatinine)
- Kidney stones (renal calculi) may present with sudden onset of flank pain and blood in the urine; as the stone travels down the ureter, pain can radiate to the lower abdomen, groin, and genital region.
PT considerations:
- Monitor for fatigue, altered mental status, and electrolyte imbalances
- Avoid overexertion due to risk of hypotension and electrolyte shifts
Chronic kidney disease (CKD)
Definition: Progressive decline in kidney function, leading to end-stage renal disease (ESRD) if untreated
Causes:
- Diabetes (leading cause), hypertension, glomerulonephritis, polycystic kidney disease
Stages (GFR-based): stages 1-2 involve mild kidney damage with no major symptoms; stage 3 brings moderate impairment with possible anemia and bone mineral disorders; stage 4 is severe dysfunction that begins preparation for dialysis; and stage 5 (end-stage renal disease) requires dialysis or a kidney transplant.
Signs and symptoms:
- Fatigue, muscle cramps, edema, anemia, metabolic acidosis, hypertension, itching
- Uremia (buildup of waste in blood) → nausea, confusion, neuropathy
- Pruritus is a very itchy skin that is most common in patients with advanced CKD and end-stage kidney disease (ESRD)
PT considerations:
- Monitor for fatigue, blood pressure changes, and electrolyte imbalances
- Encourage low-to-moderate intensity exercise to improve functional capacity
- Avoid excessive fluid loss (dehydration can worsen kidney function)
- Be aware of bone mineral disease & risk of fractures
Nephrotic syndrome
Definition: A kidney disorder causing severe protein loss in urine due to damage to the glomeruli
Signs and symptoms:
- Severe edema (especially in the legs), proteinuria (>3.5g/day), hypoalbuminemia, hyperlipidemia.
- Increased risk of thrombosis and infections
PT considerations:
- Monitor for edema-related mobility restrictions
- Be cautious of increased clotting risk during exercise
Hemodialysis (HD) considerations
Hemodialysis is used in ESRD to filter blood through a machine when the kidneys can no longer perform their function. It is typically done 3-4 times per week for 3-5 hours per session.
Common complications:
- Hypotension during or after dialysis (due to rapid fluid removal)
- Fatigue, dizziness, cramping (electrolyte shifts)
- Access site issues (fistula/graft infections, thrombosis)
PT considerations:
- Avoid exercise immediately before or after dialysis due to fatigue and hypotension risk
- Monitor blood pressure carefully - hypotension is common post-dialysis
- Exercise should be performed on non-dialysis days or at least 4+ hours after treatment
- Do not take blood pressure on the arm with an AV fistula/graft to prevent complications
- Encourage low-impact aerobic and resistance exercises to improve endurance and prevent muscle wasting
Example: dizziness after dialysis
A patient with end-stage renal disease arrives for gait training two hours after a hemodialysis session. After a few minutes of walking, the patient reports feeling lightheaded and dizzy. What should the PTA do?
Answer: Stop the activity, have the patient sit or lie down, and check blood pressure on the arm without the AV fistula. Post-dialysis hypotension from rapid fluid removal is the likely cause, which is why exercise is scheduled at least 4 hours after treatment or on non-dialysis days. Report the finding to the supervising PT, who decides whether the session continues.