13 results about "Distal segment" patented technology

This invention provides a covered stent, comprising a main stent having a tubular body, the main stent comprising a proximal segment, a middle segment, and a distal segment along the axial direction, the diameter of the distal segment being smaller than the diameter of the middle segment; the middle segment comprising a first channel and a second channel along the radial direction, the distal segment being connected to the distal opening of the first channel; a first embedded stent is embedded in the second channel, the first embedded stent comprising a first proximal port, a first outer wall, and a first distal port along the axial direction, the first embedded stent having at least the first proximal port fixedly connected to the main stent, the first outer wall and the first distal port being movably connected to the main stent and being movable along the axial direction after connection, the embedded stent being configured to be slidably connected to the connected middle segment at least along the axis, thereby ensuring that the embedded stent has good bending and extension space when bending, avoiding bending due to axial restriction.

This invention provides a covered stent, comprising a main stent having a tubular body. The main stent includes a proximal segment, a middle segment, and a distal segment sequentially along the axial direction. The distal end of the middle segment has a distal opening. A first embedded stent and a second embedded stent are disposed within the middle segment. The lumens of the first and second embedded stents communicate with the lumen of the proximal segment, and the first embedded stent connects the proximal and distal segments. The second embedded stent is spirally wound around the outer surface of the first embedded stent in the circumferential direction, and the first embedded stent connects the proximal and distal openings. The spiral arrangement of the second embedded stent provides a longer anchoring path for subsequent implantation of smaller stents. Furthermore, by adjusting the number of spiral turns, the proximal and distal ports of the second embedded stent can be arranged on the same side or opposite sides to accommodate guidewire insertion under different surgical procedures, thus broadening its applicability.

The invention is entitled "Electroporation with Cooling". A medical system is disclosed, the medical system comprising a catheter comprising: an insertion tube having a distal end; an elongate resilient distal segment secured to the distal end of the insertion tube, the distal segment having an outer surface; and a plurality of electrode structures, each electrode structure disposed on and protruding from the outer surface of the distal segment, each electrode structure comprising a respective primary electrode and at least one respective secondary electrode extending around the outer surface, and a respective electrically insulating material disposed around the outer surface and between the respective primary electrode and the at least one respective secondary electrode, the respective primary electrode protruding from the outer surface to a greater extent than the at least one respective secondary electrode and the respective electrically insulating material.

The application provides a femoral stem prosthesis for severe hip dysplasia, which comprises a first section and a second section which are integrally formed and distributed along the up-down direction, the first section is used for penetrating and press-fitting in the proximal segment of the femur, and the second section is used for inserting and press-fitting in the distal segment of the femur. The first section and the second section adopt a tapered structure, which can improve the axial stability, and the rotation-stopping structure outside the first section and the second section can limit the relative rotation of the prosthesis and the femur. The second section of the femoral stem prosthesis can select a suitable size according to the actual situation of the femur of the patient, so as to improve the stability of the connection, when the second section is stably connected with the distal segment of the femur, the proximal segment of the femur is press-fitted with the first section, and finally the femoral stem prosthesis is continuously pressed, so that the cross section of the distal segment of the femur and the proximal segment of the femur is in contact and sufficient pressing force is provided.

In one exemplary embodiment, an endovascular device may include a hollow shaft having a proximal end and a distal end, and sized for insertion into a blood vessel. The endovascular device may also include a control line having a proximal end and a distal end, and extending through the hollow shaft. The endovascular device may also include an actuatable working element located proximate the distal end of the hollow shaft, and configured to receive an actuation force transmitted via the distal end of the control line. The endovascular device may further include an actuator configured to exert the actuation force on the proximal end of the control line, to thereby cause relative movement between the control line and the hollow shaft and to actuate the working element. The hollow shaft may also include a cable formed of a plurality of wound wires and including a proximal segment, at least one transition segment, and a distal segment. The proximal segment, at least one transition segment, and distal segment may include different numbers of wires.

This invention provides a covered stent, comprising a main stent having a tubular body. The main stent includes a proximal segment, a middle segment, and a distal segment along the axial direction. The middle segment includes a concave portion disposed axially on the sidewall of the middle segment. The concave portion is at least partially recessed toward the inner cavity of the middle segment, so that the middle segment forms a first channel and a second channel radially separated by the concave portion. The second channel communicates with the distal segment, and the distal side of the first channel has a distal opening. The first channel and the second channel separated by the concave portion can better facilitate blood diversion and ensure patency. At the same time, it can enhance the stability of the small stent when implanted in the first channel. Furthermore, the middle segment with the concave portion replaces the method of independently setting embedded stents and branch stents, which can minimize the radial volume of the covered stent during compression delivery.

The object of the invention is a dynamic intramedullary nail with a hybrid drive, characterised in that it comprises a casing consisting of a proximal and a distal segment, and the casing has comprised therein a magnetic rotor for inducing an external magnetic field, and an inner spring element cumulating potential energy during assembly, constituting driving means for lengthening the nail in a telescopic manner.

This application relates to the field of medical devices and discloses an interventional catheter and a blood pumping device. The interventional catheter includes a pumping tube and a detection assembly. The pumping tube comprises a distal segment, a middle segment, and a proximal segment arranged sequentially along the axial direction. The distal segment includes a distal pumping window, and the proximal segment includes a proximal pumping window. Both the distal and proximal pumping windows communicate with the lumen of the pumping tube. The middle segment is bendable. Driven by a power assembly, the pumping tube pumps fluid between the distal and proximal pumping windows. The detection assembly includes a distal detection element and a proximal detection element. The detection portion of the proximal detection element is recessed into the smooth transition outer surface of the proximal segment. This improves the positional accuracy of the interventional catheter during operation.

This invention provides a covered stent, comprising a main stent, which includes a proximal segment, a middle segment, and a distal segment along the axial direction. The distal end of the middle segment includes a distal opening, and the inner cavity of the middle segment is connected to a first embedded stent and a second embedded stent. The surface of the middle segment is covered with a first covering membrane, and the surfaces of the distal segment and the second embedded stent are covered with a second covering membrane. The surface friction coefficient of the second covering membrane is less than or equal to that of the first covering membrane. The distal segment is simultaneously connected to both the distal opening and the second embedded stent, and after connection, the inner surfaces of the distal segment and the second embedded stent are integral continuous surfaces. The first covering membrane has a stronger tensile strength than the second covering membrane. Connecting the second covering membrane to the first covering membrane reduces the possibility of the second covering membrane being stretched and deformed. Furthermore, only the outer surface of the second covering membrane is connected to the first covering membrane to ensure that the inner surfaces of the distal segment and the second embedded stent are integral continuous surfaces, thereby ensuring long-term blood patency.

This application discloses a finger mechanism and a robotic hand, relating to the field of robotic hand technology. The finger mechanism includes a guide seat, a proximal segment, a middle segment, and a distal segment, which are hinged sequentially. The output end of a first motor is connected to a first worm gear, which engages with a first worm wheel. The first worm wheel is connected to a first driving wheel, which has a first drive rope connected to the proximal segment to drive its swing. The output end of a second motor is connected to a second worm gear, which engages with a second worm wheel. The second worm wheel is connected to a second driving wheel, which has a second drive rope connected to the middle segment to drive its swing. This finger mechanism, through dual-motor drive and a worm gear structure, achieves independent and precise control of the proximal and middle segments of the robotic hand finger, effectively solving the problems of motion trajectory limitations caused by single-motor drive and reliance on complex algorithm adjustments in existing technologies, thus improving the response speed and positioning accuracy of the robotic hand.

The present invention relates to a robot joint (2), comprising: a proximal segment (4); a distal segment (6) connected to the proximal segment (4) by means of a pivot joint, the distal segment (6) being configured to pivot about an axis of the pivot joint between a first position of the joint (2) and a second position of the joint (2); a motor configured to actuate a cable transmission (12), the cable transmission (12) comprising an upper portion fixed to the proximal segment (4) on one side and to the distal segment (6) on the other, and a lower portion fixed to the proximal segment (4) on one side and to the distal segment (6) on the other; the joint (2) being characterized in that the pivot joint is formed by a toothed portion of the proximal segment (4) meshing with a toothed portion of the distal segment (6). Abstract figure: Figure 2

Delivery systems for expandable and stented implants include adjustable tensioning members that control the expansion of the implant along the length of the implant. The tensioning members are wound onto one or more rotors located on the distal segment of the delivery system, which are rotated to unwind the tensioning members and incrementally expand the implant. Positioning mechanisms are also provided to adjust the position and orientation of the implant during delivery.

A surgical instrument cutting accessory comprises a tube assembly (38), the tube assembly comprising an outer tube having at least one slotted region (50) configured to be bent into a molded shape and to maintain the tube assembly in the molded shape. The slotted region may be a proximal slotted region separated from a distal slotted region to define a rigid intermediate segment and a rigid distal segment of the tube assembly. The proximal slotted region or the distal slotted region may have different rotational directions. The spacing between adjacent slots in the proximal slotted region may differ from the spacing between adjacent slots in the distal slotted region. The tube assembly can be molded with an initial pre-bend at a predetermined angle and can be configured to be bent to a predetermined angle. The tube assembly may be a two-tube configuration or a three-tube configuration.