Assuming that there are no signs of arterial or venous circulatory compromise, I suggest performing daily dressings, alternating as needed proteolytic substances (for "cleaning0r secretions") with healing stimulant substances. All involved with an elastic bandage firmly but not too tight.

Antibiotic use was limited to combat obvious and aggressive infection not responding to curative, and always guided by culture and sensitivity test.

Relative rest with the limb elevated could s helps.

Sergio

Dear Ahmad

Chronic wounds are those that are not repaired in time expected and may cause complications.

Wound healing by primary intention may occur when there is loss of tissue and the skin edges are juxtaposed to one another; by secondary intention, which occurs in wounds where there was loss of tissue and the edges of the skin are distant from each other, being necessary formation of granulation tissue until the contraction and epithelialization happen. It is important to note that as the wound becomes chronic bacteria to go deeper , being necessary to use more aggressive measures such as debridement and antibiotic therapy. If the wound is clean, with no signs of necrosis and infection, I suggest daily dressings associated with proteolytic drug.

I would certainly consider a wound vacuum  device in this case and debridement if necessary.  These devices are miraculous in the ability to facilitate secondary closure, while removing debris and increasing circulation necessary for healing.