Transdermal drug delivery device

Abstract

The invention discloses a percutaneous drug-delivery device, comprising an application disk (1) stuck to skin, and a drug cushion (2) arranged under the lower part of the application disk (1). The upper part of the application disk (1) is a top surface (3); an outer-ring cavity (4) with a downward opening and a central cavity (5) are arranged under the top surface (3); an annular side wall (6) isarranged between the outer-ring cavity (4) and the central cavity (5); the outer-ring cavity (4) is communicated with a negative pressure source through a negative pressure passage port (7) of the top surface (3); the drug cushion (2) is arranged in the central cavity (5); the outer-ring cavity (4) is divided into an upper cavity and a lower cavity by a permeability clapboard (8), wherein, the upper cavity is communicated with the negative pressure source through the negative pressure passage port (7), and the lower cavity is open downwards. When being combined with drug therapy, the percutaneous drug-delivery device increases the percutaneous drug-delivery force, and also can form the well seal on the human skin surface.

Description

technical field [0001] The invention relates to a medical device, in particular to a transdermal drug delivery device. Background technique [0002] The transdermal delivery device only has the functions of fixing, covering the drug and promoting drug penetration. The Chinese invention patent CN2159790Y announced on March 20, 1994 discloses a "medical cupping pot". A concentric cylinder tank is added in the traditional cylinder cupping tank. When in use, the annular cavity between the two cylinders forms a negative pressure in the usual way, absorbing the skin of the treatment site, so that the medicine built in the middle cavity surrounded by the inner cylinder can be positioned, and at the same time, the drug is under the negative pressure of the surrounding annular cavity. Attraction increases the power of penetration. The annular cavity lifts the skin under the effect of negative pressure, and the capillaries of the skin will be broken if it takes a little longer. Co...

AI Technical Summary

Problems solved by technology

[0004] Also provided is a transdermal drug delivery device in which an air supply channel opening is provided on the top surface above the central chamber to inflate air from the atmospheric environment through a one-way valve; The percutaneous drug delivery device at the pressure channel port; solves the technical problem that the existing central cavity cannot maintain a certain positive pressure during the treatment process and the effect of transdermal drug delivery is not good;

[0005] Also provided is a transdermal drug delivery device with a sub-chamber communicating with it between the central cavity and the top surface; it solves the technical problem that the drug solution in the existing drug pad is absorbed into the channel opening and the pressure source

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