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The principle of WEC therapy


VistaCare enables you to choose the right treatment at the right time thanks to the WEC technology.

The WEC (Wound Environment Controlled) concept acts on the atmosphere around the wound that is placed uncovered (without dressing) inside the chamber. Controlling the  environment favors each stage of the healing process.

Inside the chamber each one of the environmental parameters is regulated thus optimizing each of the physiological healing stages.

Wounds treated with VistaCareIndications for VistaCare Technology

A wound is a break in the skin which can subsequently be distinguished as an acute or chronic wound depending on the duration and cause of formation.

Our VistaCare device is developed to support all types of complex wounds regardless of their class (acute or chronic) and their etiologies (of venous, arterial or mixed origins, diabetic foot wounds and bedsores).

What is an acute wound?

The acute wound is linked to an external or therapeutic trauma, it appears suddenly and heals in a period of time respecting the usual scarring process. Several acute wounds exist such as surgical wounds (post-operative), traumatic wounds (such as cuts, bites or frostbite), burns and graft takes.

What is a chronic wound?

Unlike acute wounds, chronic wounds are generally not caused by external trauma. They are the result of an underlying disease such as vascular disorders or uncontrolled diabetes.

The healing period is therefore lengthened due to a failure or an obstruction of the healing mechanisms.

Healing chronic wounds can be tedious and complicated.
Depending on the underlying disease, there are different types of chronic wounds such as:

– Vascular ulcers
– Diabetic foot wounds
– Certain complications on amputation stumps
– Bedsores

Doctor story

The management of wounds, both acute and chronic still remains a challenge that can lead to a long treatment sometimes fraught with failure. VistaCare offers an innovative and relatively simple therapeutic solution (WECtherapy). The results of a scientific study carried out in three centers have proved the effectiveness of this therapy on wounds which had very diverse origins (acute, vascular, burns, sickle cell disease, etc.). These encouraging results have led several teams to offer WEC therapy as first-line as well as regular wound treatment with equally positive feedback confirming the first study.
Franck Duteille, Plastic Surgeon, Nantes Hospital

Patient Story

I knew François Dufaÿ. He offered me to try his invention and I voluntarily went to Marseille in the department of Prof. Dominique Casanova, where the device was being tested. I had nothing more to lose. My leg remained in the chamber for fourteen days. I have been grafted skin again. The healing process was complete five months later. VistaCare Medical allowed me to regain the use of my leg and my job.
Gilles Viénot, 2nd patient treated with VistaCare
Wounds and healing

Wound healing stages

The healing process is mainly divided in four stages:

The debridement stage: It is divided into two parts. First, the vascular phase with the appearance of bleeding: the blood begins to clot (4 to 8 min) to create a platelet plug. Secondly, the inflammatory phase which will last between 1 and 4 days when macrophages and leukocytes come to digest the hematoma and secrete cytokines that will mark the inflammation which will stimulate the fibroblasts which will produce collagen. This stage often requires a debridement process.

The budding stage: It begins about four days after the onset of the wound; the granulation tissue is formed by the fibroblasts which will produce collagen and elastin and will stimulate the wound by the contraction of the myofibroblasts.

The epithelialization stage: The collagen fibers are remodeled. Epithelial cells come to cover the wound which contracts and closes.

The maturation stage: It will last between one and three years and concerns the remodeling of the scar in depth.

Details of healing stages

3. Blood vessels dilate (vasodilation), bleeding occurs. If only the epidermis is damaged, there will be no bleeding.
4. Blood vessels contract (vasoconstriction). Platelets are instrumental in the formation of clots to arrest bleeding.
Leukocytes and macrophages then clean the wound (eliminating dead tissue and micro-organisms). This is the inflammatory stage (between hours 12 and 24).
Fibroblasts (connective tissue cells) arrive en masse. They produce collagen and elastin. In addition, buds will form at the ends of damaged blood vessels.
Collagen fibres start to be remodeled. Epithelial cells cover the wound, which contracts and closes. A new epidermis forms. Primary healing is visible as early as 24 hours in small superficial sutured wounds.
Collagen fibers continue to be remodeled. The scar softens, becomes smoother and paler.

Positioning of VistaCare technology in the healing process

The VistaCare treatment episode ends as soon as the granulation is deemed sufficient with a satisfactory wound bed for it to be covered by dressings, autologous grafts, a dermal substitute or a flap.

During the inflammatory stage VistaCare plays a major role in cleansing thanks to a high level of hygrometry. This will facilitate the debridement of the wound by softening the necrosis and fibrin by promoting the action of proteases and growth factors and by accelerating the cell multiplication process.

During the budding/granulation stage, oxygen management promotes angiogenic action, procollagen synthesis and keratinocyte migration. The VistaCare treatment ends as soon as the granulation is deemed sufficient with a satisfactory wound bed for it to be covered by dressings, autologous grafts or a dermal substitute. Studies will need to be conducted to confirm the interest of an extension of VistaCare to increase the efficiency of engraftment.

In the epithelialization stage, the drop in hygrometry follows the needs of the wound, promoting cell differentiation.


OUR SOLUTIONVistaCare Technology

The VistaCare device makes it possible to create and modulate the sterile environment of the wound by acting on the temperature as well as the rate of humidity and oxygen of the air inside an airtight chamber where the lower limb will be placed.

This chamber is connected to an atmosphere generator which allows the programmation of a sterile and chosen atmosphere which is adapted to the healing stage of the wound identified by the caregiver.

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