摘要:
[Problem] To provide a coil body and medical apparatus using said coil body which is capable of ensuring the sufficient torque transmissibility. [Solution] A coil body (30) comprises a first layer (32) which is formed by first wires (32a) wound in a spiral shape, and a second layer (34) which is provided on an outer periphery of the first layer (32) and is formed by second wires (34a) wound in a spiral shape. Furthermore, a tensile strength of first wires (32a) is greater than a tensile strength of second wires (34a).
摘要:
A medical device includes a coil having a longitudinal axis and a radial axis orthogonal to the longitudinal axis, formed from a wire. The wire includes a cross-section with a centroid, a moment of inertia with respect to an axis running through the centroid and parallel to the longitudinal axis of the coil, and a moment of inertia with respect to an axis running through the centroid and parallel to the radial axis of the coil. The moment of inertia with respect to an axis running through the centroid and parallel to the longitudinal axis of the coil is greater than the moment of inertia with respect to an axis running through the centroid and parallel to the radial axis of the coil.
摘要:
Medical devices are described and illustrated herein. In particular, steerable guide members and catheters useful in the identification and treatment of bodily passages are provided. Methods of identifying and treating bodily passages are also provided.
摘要:
The present invention relates generally to implantable pacing leads, and more particularly to guidewire-styled temporary transvenous endocardial leads for pacing or other medical applications.
摘要:
A medical device for guiding through anatomy, such as a catheter or guidewire, with a tubular body that has been slotted to enhance bending flexibility, and a polymer liner with an anti-collapsing structure, and a method of making a medical device with a kink-resistant corrugated tubular member and an anti-collapsing structure. Anti collapsing structures may be helical or annular, and may be wire, such as ribbon wire, grooves in the liner, corrugations, or a braid. Liners may be bonded to the anticollapsing structure, or may have two layers, with the anti-collapsing structure between the layers. Corrugations may be formed between sections of the anti-collapsing 'structure with heat, pressure, stretching, compression, a mold, or a combination thereof, and may extend inward or outward. Shape or wall thickness may vary along the length to provide a varying bending stiffness. Slots may be formed in groups of two, three, or more, and adjacent groups may be rotated about the axis forming a helical pattern.
摘要:
In a medical guide wire (1) formed by a helical hollow wire body which is arranged to retractably move against a needle tip (6), the helical hollow wire body is formed into a wire-stranded helical hollow tube (2) by stranding a multitude of wire coil elements (3). The wire coil elements (3) of the helical hollow wire body are formed from stranded wires (3a). The stranding wires (3a) of the wire coil elements (3) have a stranding direction substantially in parallel with an axial direction (4) of the helical hollow wire body.
摘要:
In a medical guide wire (1) formed by a helical hollow wire body which is arranged to retractably move against a needle tip (6), the helical hollow wire body is formed into a wire-stranded helical hollow tube (2) by stranding a multitude of wire coil elements (3). The wire coil elements (3) of a wire-stranded helical hollow tube (2) has a stranding angle (θ1) of 55 degrees or less against an axial direction of the wire-stranded helical hollow tube (2), and having an angle more than plus 2 degrees or an angle less than minus 2 degrees against a knife edge angle (θ2) of the needle tip (6), thus preventing the wire coil elements (3) from inadvertently hitched in the needle tip (6), and thereby enabling manipulators to a smooth insertion and pull operation so as to improve curability when the wire-stranded helical hollow tube (2) is retractably manipulated against the needle tip (6).
摘要:
A medical device for guiding through anatomy, such as a catheter or guidewire, with a tubular body that has been slotted to enhance bending flexibility, and a polymer liner with an anti-collapsing structure, and a method of making a medical device with a kink-resistant corrugated tubular member and an anti-collapsing structure. Anti collapsing structures may be helical or annular, and may be wire, such as ribbon wire, grooves in the liner, corrugations, or a braid. Liners may be bonded to the anticollapsing structure, or may have two layers, with the anti-collapsing structure between the layers. Corrugations may be formed between sections of the anti-collapsing 'structure with heat, pressure, stretching, compression, a mold, or a combination thereof, and may extend inward or outward. Shape or wall thickness may vary along the length to provide a varying bending stiffness. Slots may be formed in groups of two, three, or more, and adjacent groups may be rotated about the axis forming a helical pattern.
摘要:
The guide wire comprises a shaft 1 with a lumen 4 extending therethrough. The distal area 3 of the shaft has three openings 6 for the entry of pressure waves into the lumen. The openings 6 are distributed along a helical path by 120° shifts in the transverse direction 7 and by shifts corresponding substantially to the length of the openings 6 in the longitudinal direction 8.