2 results about "Wound skin" patented technology

This utility model relates to the field of negative pressure drainage technology, specifically a portable negative pressure drainage device, comprising a negative pressure source instrument, a dressing, and a drainage component. The negative pressure source instrument and the dressing are connected and cooperate through the drainage component to form a negative pressure environment to absorb fluid flowing from the patient's skin. The dressing includes a sponge layer, a baffle, and an adhesive layer. The adhesive layer adheres to the patient's skin, and the baffle corresponds to the wound area of ​​the patient's skin. The side of the baffle facing the patient's skin is used to place wet dressing medication, and the side of the baffle away from the patient is connected to the sponge layer. A gap exists between the side of the baffle facing the patient's skin and the patient's skin. The baffle is provided with ventilation holes to connect the gap between the sponge layer, the baffle, and the patient's skin. The sponge layer is used to absorb bodily fluids flowing from the patient's skin. This utility model utilizes the gap between the baffle and the patient's skin to reduce tearing of the patient's wound skin when changing or removing the dressing, thereby reducing the patient's pain.

This application provides a high-voltage electrochemical composite hydrogel for wound skin repair and its preparation method. The high-voltage electrochemical composite hydrogel is prepared by using hydroxyethyl cellulose and acrylamide monomers as raw materials to form an interpenetrating network structure. Polyvinylidene fluoride (PVDF) and ZnO nanowires are used as piezoelectric materials, and are formed by interweaving PVDF and ZnO nanowires within the hydrogel. This high-voltage electrochemical composite hydrogel significantly improves the crystallization orientation and polarization efficiency of PVDF through mechanical stretching and polarization, resulting in an order-of-magnitude improvement in the piezoelectric properties of the composite hydrogel. Simultaneously, it retains the excellent flexibility and biocompatibility of the hydrogel, showing broad application prospects in flexible sensors, self-powered devices, and human-computer interfaces.