4.4 Skin Care, Positioning, and Body Mechanics
Key Takeaways
- Reposition immobile residents at least every 2 hours to prevent pressure injuries, and report any non-blanching redness immediately.
- Pressure injuries are staged 1-4 (plus unstageable and deep tissue) and form over bony prominences like the sacrum, heels, and hips.
- Apply a gait belt over clothing, snug enough that a few fingers fit underneath, and grasp it with palms up during transfers.
- Good body mechanics: feet apart, knees bent, back straight, lift with the legs, hold loads close, and never twist.
- Range-of-motion exercises (active or passive) keep joints flexible and prevent painful contractures.
Pressure Injuries and Prevention
A pressure injury (formerly pressure ulcer or bedsore) is localized damage to the skin and underlying tissue caused by prolonged pressure, friction (skin rubbing on a surface), and shearing (skin moving opposite to the bone beneath). They form over bony prominences — the sacrum/coccyx (tailbone), heels, hips, elbows, shoulders, back of the head, and ankles.
The nurse aide is the front line of prevention:
- Reposition at least every 2 hours for bed-bound residents; every 1-2 hours in a chair.
- Keep skin clean and dry; change wet or soiled linens promptly.
- Use lift sheets to move residents instead of dragging (which causes friction and shear).
- "Float the heels" with a pillow under the calves so heels do not touch the mattress.
- Keep linens wrinkle-free and pad bony areas.
- Report any redness that does not fade within minutes — this is the earliest warning sign.
Pressure Injury Stages
The nurse stages the wound, but the CNA must recognize and report early signs.
| Stage | What it looks like |
|---|---|
| Stage 1 | Intact skin with non-blanchable redness over a bony area (does not turn white when pressed) |
| Stage 2 | Partial-thickness loss; shallow open sore, blister, or abrasion |
| Stage 3 | Full-thickness loss; fat may be visible; deeper crater |
| Stage 4 | Full-thickness loss exposing muscle, tendon, or bone |
| Unstageable | Base covered by dead tissue (slough/eschar); depth unknown |
| Deep tissue injury | Persistent purple/maroon area or blood-filled blister |
The earlier a pressure injury is caught, the easier it heals — which is why repositioning and prompt reporting matter so much.
Body Positions
Proper positioning keeps residents comfortable, supports breathing, and relieves pressure. Use pillows to support and align the body.
- Supine: flat on the back; pillow under head, support heels and calves.
- Fowler's: head of bed up 45-60° (semi-Fowler's ~30-45°, high-Fowler's ~60-90°); used for eating, breathing, and tube feedings.
- Lateral: side-lying; pillow between the knees and behind the back.
- Prone: on the stomach, head turned to the side; least common.
- Sims': left side-lying with the upper leg bent forward; used for enemas and rectal care.
Transfers and Body Mechanics
A gait (transfer) belt gives the aide a secure hold during transfers and walking. Apply it over clothing around the waist, snug enough that you can slip a few fingers underneath, and grasp it with an underhand (palms-up) grip. Stand on the resident's weak side, slightly behind.
When a resident cannot bear weight, use a mechanical (Hoyer) lift — always with two staff. Check the weight limit, lock the wheels while loading, position the sling correctly, and never leave a resident suspended. Lock wheelchair and bed brakes before any transfer.
Body mechanics protect the aide from back injury — the most common CNA injury:
- Keep feet about shoulder-width apart for a wide base of support.
- Bend at the knees and hips, not the waist; keep the back straight.
- Lift with the leg muscles, not the back.
- Hold the load close to your body.
- Pivot your feet — never twist at the waist.
- Push, pull, or roll rather than lift when possible, and get help for heavy loads.
Range of Motion
Range-of-motion (ROM) exercises move each joint through its full movement to maintain flexibility, circulation, and muscle tone and to prevent contractures (permanent shortening/stiffening of a joint). Active ROM (AROM) is done by the resident alone; passive ROM (PROM) is performed by the aide for a resident who cannot move the joint; active-assisted ROM is a mix of the two. Support the joint above and below, move slowly and gently, do each motion the ordered number of times (often 3-5 repetitions), and stop at the point of pain — never force a joint.
Begin at the neck and work down to the feet, and never exercise a joint past the point of resistance.
Transferring and Ambulating Safely
When helping a resident stand and walk (ambulate), the aide stands on the resident's weak side and slightly behind, holding the gait belt with an underhand grip. If a resident starts to fall, do not try to hold them upright — instead, ease them gently to the floor, protecting the head, and bend your own knees to lower them; then call for help and do not move them until the nurse assesses for injury. For residents using a cane, it is held on the strong side; with a walker, the resident moves the walker first, then steps into it.
Lock all wheels (bed, wheelchair, lift) before every transfer, ensure the resident wears non-skid footwear, and clear the path of clutter and spills. These habits prevent the falls and injuries that are among the most common adverse events in long-term care. Before any transfer, also tell the resident what you are about to do and count "one-two-three" so you move together as a team, and always lower the bed to its lowest position when you finish.
How often should a nurse aide reposition a bed-bound resident to help prevent pressure injuries?
A nurse aide notices a reddened area over a resident's tailbone that does not turn white when pressed. This describes which stage of pressure injury?
Which action demonstrates proper body mechanics when lifting?
A resident is unable to move a joint independently, so the aide moves it through its range of motion. This is called: