7.1 Urinary Elimination, Incontinence, and Indwelling Catheter Care

Urinary Elimination, Incontinence, and Indwelling Catheter Care

Urinary elimination is a fundamental human physiological function essential for maintaining fluid and electrolyte homeostasis, acid-base equilibrium, and the excretion of cellular metabolic waste products such as urea, creatinine, and uric acid. In long-term care facilities and skilled nursing environments, assisting residents with urinary elimination represents one of the most frequent, clinically vital, and dignity-sensitive responsibilities of the Certified Nursing Assistant (CNA).

Alterations in urinary function can significantly erode a resident's physical comfort, personal dignity, independence, and integumentary health. Furthermore, improper management of elimination equipment—particularly indwelling urinary catheters—serves as a primary conduit for healthcare-associated infections. Mastering the anatomical principles of renal aging, identifying normal versus pathological urinary characteristics, selecting appropriate elimination assistive devices, and executing rigorous catheter maintenance protocols are mandatory competencies governed by the Wyoming State Board of Nursing (WSBN) and federal Omnibus Budget Reconciliation Act (OBRA) regulations.

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Urinary System Anatomy and Age-Related Physiological Changes

The urinary system comprises two kidneys (which filter blood plasma, regulate blood pressure via renin, stimulate erythrocyte production via erythropoietin, and produce urine), two ureters (muscular ducts that propel urine from renal pelves to the bladder via peristaltic waves), one urinary bladder (a hollow, distensible muscular reservoir that stores urine), and one urethra (a membranous canal through which urine is evacuated during micturition).

Urinary Tract Flow & Normal Capacities:
[Kidneys: ~1200 mL blood/min filtered] -> [Ureters] -> [Bladder: 200-300 mL triggers urge]
                                                             |
                                                   [Urethra: M: ~20 cm | F: ~4 cm]

The Impact of Biological Aging on the Urinary Tract

Normal biological aging alters every component of the renal and urinary systems. Understanding these physiological declines allows the CNA to anticipate resident needs, deliver timely assistance, and prevent complications:

1. Decreased Nephron Mass and Glomerular Filtration Rate (GFR): By age 70 to 80, the kidneys lose 30% to 50% of their functional filtering units (nephrons). Renal blood flow diminishes secondary to atherosclerotic vascular narrowing. Consequently, the kidneys filter metabolic wastes less efficiently, exhibit a reduced ability to concentrate or dilute urine, and clear pharmacological agents more slowly, drastically increasing resident vulnerability to medication toxicity and dehydration.
2. Reduced Bladder Wall Muscle Tone and Elasticity: The smooth detrusor muscle of the bladder wall undergoes progressive atrophy and fibrosis. In a young adult, the bladder comfortably holds 500 to 600 mL of urine, with the conscious micturition reflex triggering at approximately 250 to 300 mL. In the geriatric population, bladder functional capacity frequently shrinks to 200 to 300 mL or less. The bladder becomes less distensible, triggering urgent, sudden contractions even at low filling volumes (urinary urgency and frequency).
3. Incomplete Bladder Emptying and Urinary Retention: Weakened detrusor contractions and pelvic floor muscle laxity prevent the bladder from emptying completely during urination. This results in elevated post-void residual (PVR) urine volumes. Static, warm, stagnant urine pooling in the bladder provides an ideal culture medium for uropathogenic bacteria (such as Escherichia coli), sharply increasing the incidence of cystitis and pyelonephritis.
4. Nocturia: In younger individuals, nighttime secretion of antidiuretic hormone (ADH / vasopressin) increases, naturally concentrating urine and reducing nocturnal urine volume. In older adults, diurnal ADH rhythms flatten, and dependent daytime edema returns from the lower extremities to the central circulation while recumbent. This causes nocturia—the necessity to awaken two or more times during the night to void. Nocturia represents one of the leading precipitants of nighttime falls, hip fractures, and sleep disruption among long-term care residents.
5. Gender-Specific Changes:
   • Aging Females: Diminished circulating estrogen following menopause leads to atrophy of the urethral mucosa, weakening of the pelvic floor musculature, and loss of urethral closure pressure. The shortened female urethra (approximately 3 to 4 cm / 1.5 inches) provides minimal anatomical barrier against ascending perineal bacteria, compounding the risk of stress urinary incontinence and ascending urinary tract infections.
   • Aging Males: The prostate gland, which encircles the proximal urethra directly inferior to the bladder neck, undergoes progressive cellular hyperplasia in most men over age 50 (Benign Prostatic Hyperplasia [BPH]). As the prostate enlarges, it compresses and constricts the prostatic urethra. This produces classic obstructive symptoms: difficulty initiating a urinary stream (urinary hesitancy), a weak or interrupted urinary flow, terminal dribbling, post-void fullness, and acute urinary retention.

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Normal Versus Abnormal Characteristics of Urine

Careful observation and accurate documentation of urinary characteristics provide direct clinical insight into a resident's hydration status, renal function, systemic metabolic stability, and presence of infection. The CNA is the frontline healthcare professional positioned to observe urine directly during daily care.

[!IMPORTANT] The Critical 30 mL/Hour Threshold: A minimum urinary output of 30 mL per hour (or approximately 240 mL per 8-hour shift) is clinically mandated to ensure adequate renal perfusion and the continuous filtration of toxic metabolic byproducts. If a resident's urinary catheter drains less than 30 mL in any single hour, or if a resident has not voided for 4 to 6 hours, the CNA must notify the charge nurse without delay.

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Assistive Equipment for Urinary Elimination

When assisting non-catheterized residents with voiding, selecting the proper equipment protects musculoskeletal alignment, prevents falls, preserves dignity, and ensures physiological bladder evacuation.

Bedpan Comparison Guide:
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STANDARD BEDPAN:          FRACTURE PAN (LOW PROFILE):
- Deep, contoured bowl     - Shallow, flat, tapered wedge (~1/2 depth)
- Wide contour under hips  - Shallow end placed TOWARD HEAD (under hips)
- Narrow end toward feet   - Deeper handle end TOWARD FEET
- Indication: Mobile hips  - Indication: Hip fracture/replacement, spine injury
=========================================================================

1. Standard Bedpan Versus Fracture Pan

Bedpans are receptacles utilized by bedbound residents for both urinary and fecal elimination.

• Standard Bedpan: Constructed of molded plastic or stainless steel, the standard bedpan has a deep, curved basin with a wide, contoured rim. The wide, contoured end is placed beneath the resident's buttocks, while the narrower, tapered portion points toward the foot of the bed. It requires the resident to actively bridge their pelvis or allow the CNA to lift and rotate their hips significantly.
• Fracture Bedpan (Slipper Pan): The fracture pan has a significantly lower profile with a flat, wedge-shaped front edge that is approximately 0.5 to 1 inch high, tapering upward to a deeper rear receptacle with a sturdy handle.
  • Proper Orientation: The shallow, flat, tapered end must ALWAYS be positioned toward the head of the bed, sliding smoothly under the resident's sacrum and buttocks. The deeper reservoir and handle point directly toward the resident's feet.
  • Clinical Indications: Mandated for residents who are physically unable to raise their buttocks off the bed surface without severe pain or tissue trauma: individuals with acute hip fractures, post-operative total hip replacement (arthroplasty), spinal cord injuries, lumbar vertebral fusions, extensive pelvic trauma, or bilateral lower-extremity fiberglass casts.

Step-by-Step Bedpan Placement Protocols

1. Preparation: Verify the care plan, perform hand hygiene, gather the bedpan, a protective underpad (chucks), toilet tissue, disposable wipes, and clean gloves. Provide strict privacy.
2. Ergonomics and Positioning: Raise the bed to a comfortable working level. Lower the head of the bed flat (or as low as tolerated) before placing the pan.
   • For a resident who can assist: Instruct the resident to bend both knees, plant their feet firmly on the mattress, and lift their hips upward upon a count of three. Slide the protective chucks and the bedpan smoothly beneath the elevated buttocks.
   • For a resident unable to bridge (Logroll Method): Assist the resident to turn onto their side facing away from you. Center the bedpan firmly against their buttocks (with the shallow end toward the head if using a fracture pan), hold the pan securely against the sacrum, and gently logroll the resident back onto the supine position directly over the pan.
3. Physiological Elevation: Once the bedpan is properly centered beneath the perineum, raise the head of the bed into a Semi-Fowler's or High Fowler's position (45° to 75°), unless medically contraindicated. Urinating while lying completely flat on one's back is physiologically unnatural, strains abdominal musculature, prevents the pelvic floor from relaxing, and inhibits complete bladder evacuation. Elevating the torso utilizes gravity to facilitate normal voiding.
4. Call Light and Privacy: Ensure the resident is comfortably covered with a top sheet, place toilet paper and the nurse call light directly within their active reach, step outside the room or behind the privacy curtain, and instruct the resident to ring as soon as they are finished.
5. Post-Void Care: Lower the head of the bed before removal to prevent skin shearing against the plastic rim. Support the resident, gently ease the bedpan out, cover it immediately with a clean towel or paper barrier to control odors, provide thorough perineal cleansing (wiping strictly front-to-back), pat dry, assist with hand hygiene, lower the bed, and inspect the urine.

2. The Male Urinal

A urinal is a molded plastic container equipped with an ergonomic handle, a wide angled neck, and calibrated liquid measurement markings along its transparent side.

• Assisting with Urinal Placement: If the resident is bedbound, position them in a sitting or semi-upright posture to promote urethral relaxation. If the resident cannot position the urinal independently, don clean gloves, gently position the resident's penis fully inside the opening of the urinal, and verify that the scrotum is not caught or pinched against the plastic rim.
• Infection Control Rules for Urinals:

  [!WARNING] Never place a urinal on an overbed table, bedside stand, or floor under any circumstances. Overbed tables are reserved exclusively for food trays, clean eating utensils, and oral hygiene supplies. Placing a contaminated urinal on an overbed table represents a critical cross-contamination violation. Hang the urinal securely on the bedside bed rail bracket or on the specialized hanging loop attached to the non-moving bed frame.

3. The Bedside Commode

A bedside commode is a portable chair frame equipped with armrests, a backrest, an open toilet seat, and a removable collection pail beneath. It is clinically indicated for residents who possess sufficient stability to pivot and bear weight but lack the physical endurance or safety to walk to the bathroom.

• Safety Transfers: Always position the commode alongside the bed at a 45-degree angle adjacent to the resident's stronger side. Lock all commode wheels and bed brakes securely before beginning the transfer. Always apply a transfer (gait) belt around the resident's waist, assist them to a standing position, pivot onto the commode, and ensure their feet are planted flat on the floor with call light in hand.
• Immediate Sanitation: Once used, cover the commode pail, carry it directly to the resident's bathroom, record volume on the graduate if on I&O, empty into the toilet, rinse, disinfect with hospital-grade disinfectant, and replace in the commode frame.

Indwelling Foley Catheter Care and CAUTI Prevention

An indwelling urinary catheter (commonly termed a Foley catheter) is a sterile, flexible tube constructed of latex, silicone, or teflon that is inserted through the external urinary meatus, advanced along the urethra, and seated within the bladder lumen. A small retention balloon near the distal tip is inflated with 5 to 10 mL of sterile water, anchoring the catheter inside the bladder neck to allow continuous, gravity-dependent drainage into an external closed collection system.

CAUTI Prevention Framework (CDC & Headmaster Guidelines):
+-------------------------------------------------------------------------+
|  CLOSED SYSTEM INTEGRITY:                                               |
|  - NEVER disconnect the catheter tubing from the drainage bag.          |
|  - The junction forms a sterile hermetic seal; breaking it causes CAUTI.|
+-------------------------------------------------------------------------+
|  BAG POSITIONING:                                                       |
|  - ALWAYS below bladder level at all times (gravity drainage).          |
|  - NEVER on bed side rails (bed rail movement causes traumatic avulsion)|
|  - NEVER on the floor (prevents bacterial colonization from floor dirt).|
+-------------------------------------------------------------------------+
|  TUBING SAFETY:                                                         |
|  - Zero kinks, loops, or compression; anchor to inner thigh (leg strap).|
|  - Clean >=4 inches AWAY from meatus downward using clean cloth folds.  |
+-------------------------------------------------------------------------+

The Menace of CAUTI (Catheter-Associated Urinary Tract Infection)

Catheter-Associated Urinary Tract Infections represent the most prevalent type of healthcare-associated infection (HAI) reported worldwide. In long-term care facilities, the presence of an indwelling catheter carries an estimated 3% to 7% cumulative risk of bacterial infection for every single day the catheter remains in place.

• Pathophysiological Mechanisms of CAUTI:
  1. Extraluminal Pathway: Bacteria (primarily enteric organisms like Escherichia coli, Klebsiella pneumoniae, and Enterococcus faecalis) migrate from the perianal area and colonize the moist periurethral mucous membrane. Capillary action and mucosal friction draw these bacteria along the exterior surface of the catheter tubing directly through the urethra into the bladder lumen.
  2. Intraluminal Pathway: If the closed drainage system is disconnected, if the drainage spout touches a contaminated container during emptying, or if the drainage bag is elevated above bladder level, contaminated urine flows retrogradely into the bladder, delivering millions of bacterial colonies directly to the detrusor lining.
  3. Biofilm Formation: Within 24 to 48 hours of catheterization, colonies of bacteria secrete a thick, polysaccharide protective matrix known as a biofilm along the internal and external surfaces of the catheter. This biofilm shields the bacteria from systemic antibiotic penetration and host immune leukocytes, leading to recurrent infections, encrustation, catheter blockage, and life-threatening urosepsis (systemic bloodstream infection originating from the urinary tract).

Step-by-Step Catheter Perineal Hygiene (Wyoming Headmaster Standards)

Daily catheter care (and care following each bowel movement) is mandatory to eliminate accumulated mucus, smegma, and microbial colonizers at the meatal junction.

1. Preparation: Check the care plan, perform hand hygiene, don clean gloves. Prepare a basin of comfortably warm water (105°F / 40.5°C, checked with a bath thermometer and verified by the resident). Assemble clean washcloths, a towel, perineal soap, and a waterproof barrier pad.
2. Dignity and Drape: Position the resident supine with knees flexed and separated (dorsal recumbent). Drape the resident with a bath blanket, exposing only the perineum.
3. Perineal Cleansing:
   • For females: Separate the labia, clean the urethral meatus and surrounding labia from front to back using a clean surface of the washcloth for each downward pass.
   • For males: Clean the tip of the penis starting at the urethral meatus, moving outward in circular motions. (If uncircumcised, gently retract the foreskin, cleanse, rinse, and immediately pull the foreskin forward).
4. Catheter Tubing Cleansing Technique:
   • The Non-Dominant Stabilization Mandate: With your non-dominant gloved hand, securely pinch and stabilize the catheter tubing directly at the external urethral meatus. This anchors the catheter and prevents any accidental pulling, tugging, or traction against the bladder neck.

     [!CAUTION] Never pull or exert tension on an indwelling catheter. The inflated retention balloon resting inside the bladder neck will tear through delicate urethral sphincters and mucosal tissue, causing excruciating pain, profuse hemorrhage, permanent urethral scarring, and false passage creation.

   • The 4-Inch Downward Stroke: With your dominant hand holding a soapy, damp washcloth, gently wash at least 4 inches (10 cm) of the catheter tubing, starting directly adjacent to the meatus and moving strictly AWAY from the body downward toward the drainage bag in a single, continuous stroke.
   • Fresh Washcloth Surface: Rotate or refold the washcloth to expose a completely unused, clean portion of the cloth for each subsequent downward stroke.
   • Rinse and Pat Dry: Using a fresh, clean washcloth moistened with clean warm water, rinse the catheter tubing along the same 4-inch distance moving away from the meatus. Pat the area dry with a clean towel.

Closed Drainage System Positioning and Tubing Management

• The Bladder Level Rule: The urinary drainage bag must ALWAYS be maintained at a level lower than the resident's bladder at all times—whether the resident is in bed, sitting upright in a wheelchair, or transferring onto a stretcher. If the drainage bag is elevated above the level of the bladder, hydrostatic pressure forces contaminated urine within the tubing and bag to flow backward (retrograde flow) into the sterile bladder, immediately seeding pathogens.
• Hanging Locations: Bed Frame vs. Bed Rails:
  • Correct Attachment: Hang the drainage bag securely to the non-moving bed frame beneath the mattress level, or attach it to the lower metal frame beneath the seat of a wheelchair.
  • The Bed Rail Hazard: NEVER hang a drainage bag on a movable bed side rail. Side rails are adjusted, lowered, and raised frequently throughout the shift. Raising a bed rail with an attached bag lifts the urine reservoir above the bladder level. Conversely, lowering a bed rail abruptly exerts violent traction on the catheter, potentially ripping the inflated balloon through the urethra.
• The Floor Hazard: NEVER allow the drainage bag or tubing to touch or rest on the floor. Healthcare facility floors harbor virulent pathogens, including multidrug-resistant organisms such as MRSA and C. difficile. Contact with floor surfaces contaminates the bag and drainage port.
• Eliminating Kinks and Dependent Loops: Inspect the drainage tubing continuously to ensure it remains free of kinks, sharp bends, twists, or compression beneath the resident's legs. The system functions entirely by gravity drainage. Any bend or dependent sag (a hanging "U" loop that drops below the level of the collection bag) traps urine, stops flow, increases pressure in the bladder, causes severe bladder spasms, and promotes bacterial colonization. Coil excess tubing flat on the bed sheet, securing it with a sheet clamp without pinching the lumen.
• Catheter Securement Device: Verify that the catheter is anchored to the resident's body using an approved commercial securement device (e.g., StatLock) or elastic leg strap. Secure the tubing to the anterolateral inner thigh in females and to the upper thigh or lower abdomen in males (which prevents penoscrotal junction pressure necrosis). Leave sufficient slack so that leg movement does not pull on the catheter.

Emptying the Urinary Drainage Bag and Output Measurement

Emptying a urinary drainage bag is an aseptic measurement procedure that must be executed with meticulous attention to cross-contamination prevention and volumetric precision.

Clinical Equipment Required

• Clean disposable examination gloves.
• Clean paper towel barriers.
• Calibrated plastic graduate cylinder (marked in milliliters / cc).
• 70% isopropyl alcohol prep pad.
• Facility documentation record (Intake and Output sheet or electronic tablet).

Step-by-Step Drainage Bag Emptying Sequence

1. Pre-Procedure Standards: Perform hand hygiene, don clean gloves. Place a clean paper towel on the floor directly beneath the urinary drainage bag to serve as a clean protective barrier.
2. Graduate Placement: Place the calibrated graduate cylinder upright on the center of the paper towel barrier directly below the drainage port.
3. Opening the Drainage Spout: Carefully remove the drain spout from its protective housing. Open the clamp or push-valve, allowing the urine to drain freely by gravity into the graduate.

   [!IMPORTANT] The Non-Touch Aseptic Technique: The drainage spout must NEVER touch the sides, bottom, or rim of the graduate container, nor should it contact the paper towel or floor. Introducing pathogens to the drainage spout allows bacteria to multiply and travel into the collection bag and upward into the bladder.

4. Closing and Decontaminating the Port: Once the bag is completely drained, close the clamp or push-valve securely. Inspect the tip of the spout for residual urine droplets. With a fresh 70% isopropyl alcohol prep pad, vigorously wipe the exterior and rim of the drainage spout for several seconds. Place the decontaminated spout securely back into its protective fabric sleeve or plastic holder on the bag.
5. Volumetric Measurement at Eye Level:
   • Lift the graduate by its handle and place it on a clean paper towel barrier on a flat, stable surface (such as the bathroom countertop or the low edge of the bedside table).
   • Stoop down so that your eyes are directly level with the liquid surface.
   • Read the measurement at the bottom of the meniscus (the slight downward curvature of the fluid surface) using the milliliter (mL) scale. Never attempt to read fluid volume while holding the graduate tilted in the air, which produces substantial parallax errors.
6. Urine Assessment and Documentation: Inspect the urine for color, transparency, particulate matter, blood clots, or abnormal odor. Discard the urine into the toilet, flush, rinse the graduate with cold water, disinfect per facility protocol, and store in the resident's designated clean utility area.
7. Post-Procedure: Remove gloves, perform hand hygiene, and immediately record the exact volume in milliliters (mL) on the resident's I&O record. Promptly report any abnormal findings (such as output <30 mL/hr, hematuria, or cloudiness) to the charge nurse.