5 results about "Wound surface" patented technology

The invention relates to a negative pressure closed drainage device, comprising a porous foam cushion (1), a drainage tube (2) with a side hole, a joint (4), a conduit (11), a drainage container (5) and a negative source (6). The drainage tube (2) is connected with the conduit (11) which is led into the drainage container (5), and the drainage container (5) is connected with the negative pressure source (6). One end of the drainage tube (2) is positioned in the porous foam cushion (1), and the other end of the drainage tube (2) is led out from the upper end of the porous foam cushion (1). The leading-out end of the drainage tube (2) is fixed with an adhesive film (7), and a sealing film (3) is sealed on the adhesive film (7). The invention overcomes the defects that the traditional negative pressure closed drainage device is inconvenient, a better carrier used as a support is not available when the sealing film is sealed, and a drainage device for a wound surface on the body surface is very inconvenient to use when carrying out negative pressure sealing drainage. The negative pressure closed drainage device for the wound surface tissue on the body surface has the advantages of suitability for the drainage of the wound surface on the body surface, suitability for the drainage in a body cavity and more convenient film sticking.

The invention discloses a medical cotton swab capable of adhering to the wound surface to promote healing. The medical cotton swab comprises a cotton stick and composite fiber cotton wrapping the end of the cotton stick. According to the cotton swab, traditional absorbent cotton is replaced with renewable and degradable composite polylactic acid fiber cotton to reduce the production cost and overcome the inherent defects of the absorbent cotton without generating adverse effects on the wound surface. The surface of the cotton swab is grafted with a polydopamine-polyvinylpyrrolidone/multiwalled carbon nanotube film in an adhering mode to form the composite fiber cotton with certain adhesion, which can adhere to the wound surface to enhance the effect of disinfection and sterilization and accelerate wound healing. The production process of the cotton swab is simple and efficient, materials in various links can be recycled, and no adverse effect is generated on the environment.

The invention discloses application of a leaf spring to circumcision of tubular tissues of living bodies, and belongs to the technical field of medical instruments. Specifically, the leaf spring is wound around the outer circumference of the tubular tissue of the living body to serve as a cutting board for the tubular tissue; therefore, the circumcision becomes feasible, and operations for formingopen wounds in the patient's abdomen are not needed; an operator only needs to put in the leaf spring via a surgical hole of an original laparoscopic puncture outfit, operate a clamp to hoop the leafspring on the outer wall of a vaginal tube, and circumferentially cut the position, corresponding to the leaf spring, in vagina; in the process, the inner ring surface of the leaf spring acts as thecutting board; on the one hand, different from open-type resection, wound surfaces can be minimized as few as possible, on the other hand, the procedure is completed by one step through circumferential circumcision due to the cutting board, and the efficiency is significantly better than that of existing manual opening and cutting by ultrasonic knifes.