摘要:
A surgical instrument for applying and fixing a fixation screw to a threaded section of a head of a bone anchorage element comprises a distal end and a proximal end, a first tool member and a second tool member. The first tool member is arranged at the distal end and adapted for engaging the threaded section of the bone anchorage element head. The second tool member is adapted for engaging a tool-engaging member of the fixation screw. The instrument is constructed such that in a working position of the instrument the second tool member is supported on the instrument in a torque proof manner relative to the first tool member about a longitudinal axis and is movable parallel to the longitudinal axis relative to the first tool member. Moreover, an osteosynthesis device comprising at least two bone anchorage elements and at least one connection member is suggested. Further, a method for fixing an osteosynthesis device on two vertebrae of a spinal column in a minimal invasive manner is proposed.
摘要:
A surgical instrument for applying and fixing a fixation screw to a threaded section of a head of a bone anchorage element comprises a distal end and a proximal end, a first tool member and a second tool member. The first tool member is arranged at the distal end and adapted for engaging the threaded section of the bone anchorage element head. The second tool member is adapted for engaging a tool-engaging member of the fixation screw. The instrument is constructed such that in a working position of the instrument the second tool member is supported on the instrument in a torque proof manner relative to the first tool member about a longitudinal axis and is movable parallel to the longitudinal axis relative to the first tool member. Moreover, an osteosynthesis device comprising at least two bone anchorage elements and at least one connection member is suggested. Further, a method for fixing an osteosynthesis device on two vertebrae of a spinal column in a minimal invasive manner is proposed.
摘要:
A surgical instrument for holding and inserting a connection member of an osteosynthesis device into a retainer of a bone anchorage element comprises a distal end, a proximal end and a first connection portion at a distal end. The first connection portion comprises a connection member receptacle for receiving at least a portion of the connection member. The instrument further comprises a locking mechanism which is transferable from a release position, in which the instrument is releasable from the connection member, to a connection position, in which the instrument can be connected to the connection member. Moreover, an osteosynthesis device comprising at least two bone anchorage elements and at least a connection member is proposed, which further comprises a surgical instrument for holding and inserting the connection member into at least one retainer of the bone anchorage elements.
摘要:
A surgical instrument for holding and inserting a connection member of an osteosynthesis device into a retainer of a bone anchorage element comprises a distal end, a proximal end and a first connection portion at a distal end. The first connection portion comprises a connection member receptacle for receiving at least a portion of the connection member. The instrument further comprises a locking mechanism which is transferable from a release position, in which the instrument is releasable from the connection member, to a connection position, in which the instrument can be connected to the connection member. Moreover, an osteosynthesis device comprising at least two bone anchorage elements and at least a connection member is proposed, which further comprises a surgical instrument for holding and inserting the connection member into at least one retainer of the bone anchorage elements.
摘要:
An orthopedic retaining system comprising at least one bone screw which has a head part and a threaded shaft pivotally mounted thereon is disclosed. A clamping element is mounted in the head part, which can be pressed against the threaded shaft from its upper side and, as a result, secure the threaded shaft relative to the head part. A retaining bar is arranged in a receptacle of the head part and extends essentially transversely to the threaded shaft. A clamping device is provided on the upper side of the head part, by means of which the clamping element and the retaining bar are pressed into the head part such that the threaded shaft and the retaining bar are secured in position relative to the head part. The clamping device comprises an elastically deformable pressure element which is displaced into a clamping position during actuation of the clamping device.
摘要:
A joining of a titanium material with an aluminium material, wherein the parts made of the two substances are connected with each other in a substance-to-substance manner. Preferably, the joining is effected by a laser beam or an electron beam.
摘要:
To regulate a laser welding process, an optical sensor detects the seam flank angle and/or the seam position of the laser welded seam directly following its formation, the resulting actual measured information is compared with stored or externally provided nominal information to give a comparison result, and the position of the welding laser beam source is adjusted based on the comparison result to regulate-out any divergence between the actual measured information and the nominal information. The apparatus includes a laser welding device including a welding laser beam source that moves along the joint to be welded, an optical sensor arranged directly on or following the laser welding device, and a circuit including a comparator that compares the actual measured information with the stored or externally provided nominal information regarding the seam flank angle and/or the seam position. The laser beam source is movable to adjust the location and orientation of the generated laser beam and its penetration into the weld joint responsive to the comparison result.
摘要:
In order, even in the case of bone screws with a particularly small head, to ensure a secure hold of the bone screw in a bone, a bone screw is proposed, having a screw body, which defines a longitudinal axis and is provided with a screw body external thread and has a proximal and a distal end, having a coupling element disposed on the proximal end for detachably connecting the screw body to a screw head designed substantially in the form of a U-shaped fork head with a coupling opening, wherein an edge of the coupling opening forms an axial stop for the coupling element for limiting a movement of the coupling element relative to the screw head in distal direction, wherein a maximum outside diameter of the screw body is larger than an inside diameter of the coupling opening, wherein the screw body comprises at least a first and a second screw body part. An osteosynthesis device having such a bone screw and a method of manufacturing such a bone screw are further proposed.
摘要:
So as to be able to determine the position of a functional element as precisely as possible during the invasive use of a blood pump in a patient's body without the use of imaging methods, the blood pump is connected to a main sensor which records signals of the patient's heart, which are compared to other electrophysiological heart signals recorded by several sensors distributed on the body surface so as to allow the position of the blood pump to be determined by way of linking.
摘要:
A fluid pump has at least one impeller blade which is rotatable about an axis of rotation and conveys a fluid in operation. The fluid pump has a support device which supports the at least one impeller blade in at least one support region. The support device is changeable between a first state in which the at least one impeller blade is radially compressed and a second state in which the at least one impeller is radially expanded. The at least one impeller blade extends at least partly radially inwardly with respect to the axis of rotation from the at least one support region in the radially expanded state of the blade.