Abstract: An anesthetic needle for medical use that is extremely easy to use is provided. The anesthetic needle includes an epidural needle (1) and an anesthetic needle (40) that is rotatably inserted into the epidural needle from a proximal end portion. The epidural needle is provided, at the proximal end portion, with a length adjusting mechanism (10) of a tube shape extending in an axial direction. The anesthetic needle is provided, at a proximal end portion, with an engaging portion (44) of a circular tube shape loosely fitted within the length adjusting mechanism of the epidural needle. A needle is inserted through a center portion of the engaging portion. A plurality of circumferential grooves (45) are juxtaposed axially on an outer peripheral surface of the engaging portion. The length adjusting mechanism is provided therein with an engaging projection (17).

Abstract: A medical bevel needle (1) having an open bevel end surface 3 is provided, wherein cutting edges (9) that linearly extend from the front end of the front-end portion (2) on the right and left sides diagonally rearwardly are formed either by right and left front ground faces (5) crossing the open bevel end surface (3) or by right and left front ground faces (5) crossing the external circumferential surface (4) of the bevel needle (1), and the maximum lateral width between the cutting edges is limited by right and left rear ground surfaces (6).

Abstract: A outer needle of an anesthetic needle assembly to be injected into an epidural area, has a distal end which is cut and bent to form an annular cutting edge. The distal end is gently bent so that an anesthetic needle having a forward end can slide readily out of the annular cutting edge. The annular cutting edge has a wave-like configuration with an extended circular or rectangular annulus with round corners and outwardly expanded sides.

Abstract: A medical anesthetic needle (1) is provided that includes an inner needle (3) of a straight needle shape, having a pencil-pointed tip (4), and an outer needle (2) of a straight tubular shape, having the inner needle inserted thereinto and therethrough from the rear end thereof. A foremost-end part (12) of a hollow, truncated conical shape or the like of the outer needle (2) is formed so that the minimum inner diameter thereof is smaller than the outer diameter of the main body (5) of the inner needle (3). When the inner needle (3) is inserted into and through the outer needle (2), the circumferential fore-end edge of the foremost-end part (12) is in close contact with the circumferential surface of the tip (4) or the main body (5) of the inner needle (3), and no gaps are thus formed therebetween. Therefore, when needled, a patient's nervous tissue is unlikely to be nipped in a gap between the inner and outer needles to cause pain to the patient.

Abstract: A medical anesthetic needle which comprise an outside needle and a mandrin inserted into the outer needle to freely move in and out, and is slightly bent upward at is tip when its needle axis is positioned horizontal.

Abstract: A medical anesthetic needle (1) is provided that includes an inner needle (3) of a straight needle shape, having a pencil-pointed tip (4), and an outer needle (2) of a straight tubular shape, having the inner needle inserted thereinto and therethrough from the rear end thereof. A foremost-end part (12) of a hollow, truncated conical shape or the like of the outer needle (2) is formed so that the minimum inner diameter thereof is smaller than the outer diameter of the main body (5) of the inner needle (3). When the inner needle (3) is inserted into and through the outer needle (2), the circumferential fore-end edge of the foremost-end part (12) is in close contact with the circumferential surface of the tip (4) or the main body (5) of the inner needle (3), and no gaps are thus formed therebetween. Therefore, when needled, a patient's nervous tissue is unlikely to be nipped in a gap between the inner and outer needles to cause pain to the patient.