Alginate and hydrocolloid dressings sit next to each other on the formulary and serve opposite wounds. Confuse them and you either dry out a wound that needed moisture or drown one that needed absorption. The deciding factor is exudate level, and it is not subtle once you know what to look for.
Alginates are absorptive. Derived from seaweed, they gel on contact with wound fluid and pull in heavy exudate, which makes them the right call for draining wounds, cavities, and packing. They also support hemostasis. If the wound is wet and draining, alginate is the class — stocked in a range of sizes and rope forms for high-turn use.
Hydrocolloids do the opposite job. They maintain a moist healing environment over light-to-moderate wounds, stay in place for several days, and reduce dressing-change frequency. They suit pressure injuries and partial-thickness wounds in protected areas, and their long wear time makes them a home-health favorite because fewer changes mean fewer visits.
The quick reference: wet and draining points to alginate; clean and lightly exuding points to hydrocolloid. Our advanced wound care supplies guide extends this across foams, silver, and NPWT, but exudate level is the first fork in every wound-dressing decision.
Read the exudate, pick the class, and stock both so the clinician never has to compromise with the wrong dressing.