Abstract: A tissue removal device includes a housing, a catheter extending from the housing and configured to be inserted into the body of a patient, a bending unit including a plurality of bending blocks that is disposed at a front end portion of the catheter and at least one or more wires that control a motion direction of the bending blocks, and a tissue removal unit disposed at the front end portion of the catheter and configured to come in contact with a tissue to be removed.

Abstract: A microneedle using a biodegradable metal is represented by Chemical Formula 1 and is absorbed and degraded after subcutaneous or epithelial insertion to thus release metal ions and degradation products into the body. In Chemical Formula 1, a, b, and c represent wt % of respective ingredients, a+b+c=100 wt %, a or b has the highest value in the range of 0?a?100, 0?b?100, and 0?c?10, and X is one or more selected from the group consisting of Ca, Fe, Mn, Si, Na, Zr, Ce, and P.

Abstract: A multi-type microneedle is proposed. The multi-type microneedle includes: a substrate part; a plurality of needle holes provided in the substrate part; a plurality of needle parts provided at a predetermined distance from each other along a circumferential direction of each of the needle holes on an area of the substrate part partitioning each of the needle holes; and a patch in contact with a user's skin while in contact with one surface of the substrate part, wherein since the needle parts is provided in a certain pattern around one needle hole by further having a drug injection part or a drug storage part capable of additionally supplying a drug, the needle parts are inserted into a predetermined area of the skin so that the drug to be delivered into the body may be rapidly diffused or permeated subcutaneously, and also an amount of the drug delivered is controlled.

Abstract: The present invention includes: a substrate portion; a needle portion provided at the substrate portion and protruding from the substrate portion to be inserted into skin; and a perforated portion provided at a junction between the needle portion and the substrate portion, wherein either of the substrate portion and the needle portion is made of the bioabsorbable metal.

Abstract: A microneedle using a biodegradable metal is represented by Chemical Formula 1 and is absorbed and degraded after subcutaneous or epithelial insertion to thus release metal ions and degradation products into the body. In Chemical Formula 1, a, b, and c represent wt % of respective ingredients, a+b+c=100 wt %, a or b has the highest value in the range of 0?a?100, 0?b?100, and 0?c?10, and X is one or more selected from the group consisting of Ca, Fe, Mn, Si, Na, Zr, Ce, and P.