The review found no eligible studies for this question.
It is very uncertain whether hyaluronic acid changes change in ulcer size compared with conventional dressing (sterile petrolatum gauze) (very low certainty).
It is very uncertain whether hyaluronic acid changes change in ulcer size > 40% compared with hydrocolloid (very low certainty).
It is very uncertain whether hyaluronic acid changes change in ulcer size (21 days) compared with dextranomer (very low certainty).
It is very uncertain whether platelet‐rich growth factor + hyaluronic acid changes change in ulcer size compared with platelet‐rich growth factor (very low certainty).
It is very uncertain whether hyaluronic acid + hydrocolloid changes change in ulcer size to at least 90% compared with hydrocolloid (very low certainty).