12.2 Static vs Dynamic Compression Application

Static versus dynamic

Static compression is anything that stays on the limb at a relatively constant profile: short-stretch and long-stretch bandages, Profore-type multilayer kits, Unna-type zinc paste, CircAid-type inelastic adjustable wraps, and graduated stockings. The “dose” is the wrap or garment you applied. It does not cycle. Independent OpenExamPrep teaching for CWCN candidates starts here for most venous ulcers in people who can wear a wrap.

Dynamic compression cycles pressure. The common clinic device is an intermittent pneumatic compression (IPC) pump: sequential sleeves that inflate and deflate. IPC is a reasonable plan for some people who cannot wrap (arthritis, obesity, no caregiver, fragile skin that tears under bandage shear) or as an adjunct when static compression is in place but edema remains stubborn. It is not a free pass around arterial assessment, and it is not first-line for every ambulatory VLU that could wear a short-stretch or multilayer system. IPC still shifts fluid centrally—untreated pulmonary edema remains a hold.

Typical IPC use is in sessions (often about an hour, once or twice daily, or as the device protocol states), with the person recumbent or seated and the sleeve fitted so it does not roll into a band. Document device, pressure setting if known, duration, and how the toes looked afterward. Dynamic therapy does not replace a stocking or wrap for the other 22 hours unless that is the explicit plan.

Application geometry: spiral, figure-8, gradient

Position the person so the leg is supported and the foot is dorsiflexed toward 90 degrees. Wrapping in plantarflexion leaves slack that becomes a loose, ineffective cylinder when they walk. Start at the base of the toes / foot, leave toes free to inspect, and work distal to proximal toward the tibial tuberosity. The gradient is higher at the ankle than at the calf. Reversing that—cinching the calf and leaving the ankle loose—creates a tourniquet above a swollen foot.

Spiral wrapping with about 50% overlap is the default for many short-stretch and elastic layers unless the product instructions specify another overlap. Fifty percent overlap roughly doubles layers along the limb, which Laplace treats as more pressure. Figure-8 turns at the ankle add layers where the limb changes shape and help lock the heel. Figure-8 up the whole calf can stack more layers than you intended; know that extra layers raise pressure. Do not leave a gap at the heel that becomes an edema window.

Pad bony prominences—malleoli, tibial crest, Achilles—before compression layers. Padding increases local radius and protects bone. Skipping padding so the wrap can “bite” is how you manufacture a pressure injury on a medial malleolus.

After the wrap: toes, slip, reapply

When the last layer is on, check the toes: color, warmth, capillary refill, pain, numbness, and ability to wiggle. Compare with the other foot if that foot is a fair control. Document the check, the product or class, layers, time, and the ABI date that justified the dose. A wrap that looks textbook on the calf is still wrong if the toes are duskier than they were ten minutes ago.

Reapply when the system slips. A slipped wrap either rolls into a narrow cord (high focal pressure) or hangs as a decorative sleeve (zero dose). Edema reduction overnight is a common reason yesterday’s snug wrap is today’s loose tube—short-stretch especially loses pressure as circumference falls. Soak-through, odor, or a wrap that has walked down over the heel are other reapply triggers. Do not “add one more Ace” on top of a slipped therapeutic system; take it down and rebuild.

Education and donning aids

Teach the person and caregiver to leave the wrap on as prescribed. Many multilayer and Unna-type systems stay for several days if dry and intact. The exceptions are not optional: numbness, dusky or blue toes, increasing pain, new rest pain — remove the wrap and call. Do not wait until the Monday clinic. Do not take a hot bath with a zinc paste boot. Do not cut a window over the ulcer that leaves a tight band above and below the hole unless the system is designed for a window and you have a plan for the edges.

After healing, 30–40 mmHg stockings fail when the person cannot get them on. Donning aids—a rigid stocking donner (butler), rubber gloves for grip, silk liner socks, zipper or Velcro garments in selected people—turn a prescription into wear. Apply stockings in the morning before edema accumulates. Replace garments when elastic recoils (often every few months). A lecture without a donner is not an application plan for someone with arthritic hands.

Clinical scenario

A 68-year-old with a VLU receives a four-layer class wrap. The applicator starts at the tibial tuberosity, spirals down, skips padding on the medial malleolus, and covers the toes “to keep them warm.” Two hours later the person reports burning pain and the exposed toenail beds the family finally uncovered are dusky. Independent OpenExamPrep teaching for CWCN candidates treats this as an application failure: reversed gradient, no toe window, no padding, and a missed ischemic check. Remove the wrap, reassess perfusion, and only rebuild distal-to-proximal with 50% overlap, padded prominences, and toes out. If arthritis later prevents self-wrap, IPC sessions plus a simpler inelastic adjustable garment can be the dynamic-plus-static plan—still with toe checks, not instead of them.