10.3 Ambulation, Prosthetics, and Assistive Devices

10.3 Ambulation, Prosthetics, and Assistive Devices

Ambulation is among the most vital human motor functions, representing autonomy, mobility, and independence. In long-term care, assisting residents with walking is not merely an activity of daily living; it is a clinical intervention that directly prevents systemic functional decline. When age, stroke, arthritis, or lower extremity amputation compromises balance and gait, assistive devices and prosthetics restore mobility. The Certified Nurse Aide must master safe ambulation protocols, recognize physiological warning signs during transfers, guide correct device mechanics, and maintain skin integrity under orthotic and prosthetic appliances.

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Physiological Benefits of Regular Ambulation

Regular weight-bearing ambulation produces far-reaching therapeutic effects across every major physiological organ system:

• Cardiopulmonary Stimulation: Upright ambulation activates the skeletal muscle pump in the lower extremities—rhythmic calf muscle contractions compress the deep veins, boosting venous return to the heart and preventing dependent edema and venous thromboembolism. Ambulation expands lung tidal volume, improves ventilation-perfusion matching, mobilizes bronchial secretions, and dramatically lowers the risk of hypostatic pneumonia and atelectasis.
• Gastrointestinal Peristalsis: Physical trunk movement and gravitational forces stimulate smooth muscle contraction throughout the colon, accelerating fecal transit, promoting normal bowel elimination, and preventing severe constipation and fecal impaction.
• Skeletal Density & Joint Health: Mechanical weight-bearing stresses trigger osteoblastic activity, laying down new bone matrix and preserving bone mineral density to combat osteoporosis. Walking circulates synovial fluid within the knee and hip joints, nourishing avascular articular cartilage.
• Urinary Drainage: Gravity assists the natural flow of urine from the renal pelvis through the ureters into the bladder, preventing urinary stasis, reducing renal calculi (kidney stone) formation, and decreasing urinary tract infections.
• Psychosocial & Emotional Health: Walking fosters self-esteem, provides opportunities for social interaction in communal areas, reduces the incidence of depression, and promotes healthy circadian sleep patterns.

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Pre-Ambulation Clinical Safety Checks

Before initiating ambulation, the CNA must complete three mandatory bedside clinical safety checks to prevent falls and physical trauma:

1. Dangling for Orthostatic (Postural) Hypotension Assessment

When an individual transitions rapidly from a recumbent (lying down) to an upright position, gravity pulls 500 to 1,000 mL of blood into the lower extremities and splanchnic circulation. In elderly individuals with sluggish baroreceptor reflexes and autonomic stiffness, this causes an acute drop in systemic blood pressure known as orthostatic hypotension (defined as a drop in systolic blood pressure of ≥20 mmHg or diastolic blood pressure of ≥10 mmHg within 3 minutes of standing), depriving the brain of oxygen.

Bedside Dangling Protocol:
1. Elevate the head of the bed into Fowler's position.
2. Assist the resident to pivot and sit on the edge of the bed with feet flat on the floor.
3. Instruct the resident to "dangle" for 1 to 2 minutes.
4. Ask the resident: "Do you feel dizzy, lightheaded, or see any spots?"
5. Observe for clinical signs of hypoperfusion: facial pallor, diaphoresis (sweating), or sudden unsteadiness.
6. If the resident reports dizziness or exhibits pallor, immediately assist them back into bed and notify the charge nurse.

2. Proper Non-Skid Footwear

Residents must never be ambulated in bare feet, smooth slippers, or regular thin socks. The CNA must verify that the resident is wearing properly fitting, rubber-soled walking shoes with secure heel support or facility-approved non-skid socks featuring rubberized gripping treads across the sole.

3. Snug Gait Belt Application

A gait belt (transfer belt) is a strong canvas or nylon strap with a metal or heavy plastic buckle, mandated for all assisted ambulation and transfers unless medically contraindicated (e.g., recent abdominal surgery, colostomy, chest tubes, or severe abdominal aortic aneurysm):

• Placement: Apply the gait belt over the resident's clothing around the natural waistline (below the ribs and above the iliac crests). Never apply a gait belt over bare skin or delicate breast tissue.
• Snugness Verification: Fasten the buckle securely. The belt must fit snugly, allowing the CNA to slip two flat fingers between the belt and the resident's body. A loose belt slips upward into the axilla or rib cage during ambulation, causing discomfort and losing stability.
• CNA Grip & Body Mechanics: The CNA grasps the belt using an underhand (upward) grip with palms facing up. The CNA stands slightly behind and to the resident's weaker (affected) side, maintaining a broad base of support.

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Assisting with Mobility Devices

Assistive devices expand the resident's base of support, redistribute body weight away from painful or weakened lower limbs, and enhance balance.

1. Canes: Single-Point & Quad Canes

• Holding Side Rule (Mnemonic: COAL): The cane must ALWAYS be held on the resident's STRONGER (unaffected) side. The mnemonic COAL stands for Cane Opposite Affected Leg. Placing the cane on the strong side allows the cane and the weak leg to move forward together, creating a stable triangular base of support.
• Proper Sizing: The top of the cane handle should align with the resident's greater trochanter (the prominence of the upper hip) or the resident's wrist crease when the arm hangs relaxed at the side. The elbow should flex at an angle of 15 to 30 degrees.
• Stepping Sequence:
  1. The resident advances the cane forward 6 to 10 inches.
  2. The resident steps forward with the weaker (affected) leg, bringing it even with or slightly past the cane.
  3. The resident steps forward with the stronger leg, advancing it past the cane and weak leg.
• Quad Cane Specifics: A quad cane features a four-point rectangular base offering greater stability than a standard single-point cane. The CNA must verify that the flat (straight) side of the base rests closest to the resident's body, while the flared prongs point outward away from the resident. If the flared prongs face inward, the resident will catch their foot on the legs and trip.

2. Walkers: Standard vs. Rolling Walkers

Walkers provide maximum four-point stability for residents with bilateral weakness, poor balance, or severe joint degeneration:

• Stepping Sequence:
  1. The resident lifts or rolls the walker forward 6 to 8 inches (ensuring all four rubber tips or wheels are firmly grounded before stepping).
  2. The resident steps forward into the center of the walker frame with the weaker leg first.
  3. The resident brings the stronger leg forward, aligning it even with the weaker leg. The resident must never step past the front horizontal bar of the walker.

[!WARNING] Critical Walker Safety Rule: Standing from a Chair A resident must NEVER pull on a walker to stand up from a chair, bed, or wheelchair. Pulling on the top horizontal bar changes the walker's center of gravity, causing it to tip backward toward the resident and provoking a violent fall. The resident must plant both feet on the floor, place both hands firmly on the chair armrests or mattress, push downward to a standing position, achieve balance, and only then reach forward to grasp the walker handgrips.

3. Axillary Crutches

When crutches are ordered, improper sizing or weight-bearing technique can cause severe neurological injury:

• Proper Clearance: The top axillary pad must rest 2 to 3 finger widths (approximately 1 to 1.5 inches) below the axilla (armpit) when the resident stands upright.
• Palmar Weight-Bearing: The resident must support 100% of their body weight on their hands and palms pushing down on the handgrips, with elbows flexed at 20 to 30 degrees. Body weight must NEVER rest on the axillary pads. Bearing weight on the armpits compresses the brachial plexus and radial nerve, causing crutch palsy—a debilitating neuropathy resulting in wrist drop and permanent hand paralysis.

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Prosthetics, Orthotics, and Splints

Restorative care encompasses the maintenance of artificial limbs (prostheses) and supportive braces (orthotics):

Managing Wearing Schedules and Tissue Breakdown

Orthotic splints and prosthetic sockets concentrate mechanical shear forces and pressure over bony prominences. The CNA must strictly adhere to the physician-ordered wearing schedule (e.g., "Apply splint at 0800, remove at 1000 for skin inspection and PROM; reapply at 1200"). Whenever an orthosis or prosthesis is removed, the CNA must inspect the underlying skin immediately under good lighting. Any persistent redness, blister, skin peel, or localized heat must be reported to the licensed nurse immediately, and the device must not be reapplied until the nurse evaluates the resident's skin.