411 results about "External fixator" patented technology

The invention relates to a coupling of two sides of a synergetically cooperating fixation system in medical equipment and apparatus, illustrated by way of example of an external fixator with rod-like guide elements, wherein a point-precise and internally tension-free clamping connection is formed by in each case two planar parallel disposed faces. The complementary, uncoated coupling surface is shape-matchingly impressed "de novo" and "uniquely" during each coupling closure by a static press-on force based on a diamond, plastic grain layer of a chaotic profile solidly attached to one of the faces, such that a clamping connection with the multilatent force-form match closure is furnished.

An external fixator system comprising at least two fixation plates which are arranged at a distance to each another, at least one adjustable length having a first end region and a second end region which are in connection with the fixation plates and at least one actuation unit to adjust the length of the strut in order to adjust the distance and/or orientation between the fixation plates. The actuation unit is in a fixed connection with at least one of the fixation plates as well as with at least one of the end regions of the respective strut in order to connect the strut with the fixation plate. The actuation unit comprises a feedback unit which provides the user with a feedback concerning the degree of the actuation.

An external fixator for treating a fracture of a long bone has six extension arms which are extendable out of and retractable into a main body. The six extension arms are arranged into two sets of three, with each set of three extension arms being able to support a fixation ring. Each extension arm is pivotable at a joint and extendable so as to allow the ring to be set at a wide range of angular positions relative to the main body. The three extension arms and the ring each define a wrap angle about the axis of the long bone being treated. The longitudinal position of each extension arm can be changed either with a coarse adjustment capability or with a fine adjustment capability, with the coarse adjustment capability being through rotation of a thumb wheel. The six extension arms are also arranged into three opposing pairs, with each pair of extension arm shafts is disposed in an abutting relationship in the main body such that the extension arm shafts extend or retract out opposing sides of the main body.

An external fixator for securing a bone through a first bone screw connected to a first portion of the bone and a second bone screw connected to a second portion of the bone. The external fixator includes a first bone screw clamping assembly for receiving the first bone screw and a second bone screw clamping assembly for receiving the second bone screw. The external fixator additionally includes an angular correction module connecting the first and second bone screw clamping assemblies. The angular correction module includes a first element and a second element coupled to allow articulation of the first bone screw clamping assembly relative to the second bone screw clamping assembly about a center of rotation spaced from the module.

A device for use in an external fixator for use in trauma surgery for rigidly connecting a first object to a second object is provided. The device includes a body and a first articulating member for connecting the device to the first object. The first articulating member is lockable and un-lockable to the body to selectively provide articulation with and rigid connection to the body. The device further includes a second articulating member for connecting the device to the second object. The second articulating member is lockable and un-lockable to the body to selectively provide articulation with and rigid connection to the body. The body, the first articulating second and the second articulating member are adapted for simultaneous locking and unlocking to each other.

A disposable medical device is especially an articulation for the relative positioning of fixation bars or of pins of an external fixator, having at least a clamping means to be introduced into the medical device, the clamping means comprises an element that alters its appearance when being heated over a threshold temperature, thus giving optical or mechanical information that the device should not be used a second time.

A work for fixing a bone by an external fixator is facilitated. The external fixator comprises a plurality of ball joints each comprising a plurality of pins inserted into a bone, a coupling member, a rotary member that fixes pins to the coupling member relatively, is coupled by the coupling member and forms a ball at least partially, a supporting member in which a first supporting member and a first screw for supporting the ball rotatably are formed, and a tubular fastening member that contains the ball, has openings at the opposite ends, is provided at one end with a second screw corresponding to the first screw, and is provided at the other end with a second supporting portion for pushing the ball against the first supporting portion when the second screw is driven into the first screw, wherein the pins and the coupling member are fixed to the supporting member and the rotary member.

The invention relates to a new type of axial unilateral external splint device for stabilizing bone fractures, comprising an extendible rod-like middle body (2) and oppositely located bone screw clamps (5, 6) which are articulated to respective ends (3, 4) of the rod-like middle body (2) by means of ball joints. Advantageously, a ball-and-socket joint (16) is mounted to each clamp (5, 6), within a main body (20) with which a bone screw clamping arrangement (25, 26, 21, 22, 23) is associated or co-operates. Also provided are ancillary members (30) adapted for removable association with the end of each clamp (5, 6) to allow each clamp to be more suitable for use, depending on the different operative installation conditions of the fixator.

An external fixator apparatus (1) of the ring type for stabilizing bone fractures, including at least one pair of rings (6, 7), of which one (6) is proximal and the other (7) is distal, and at least one tie rod (8, 9, 10) interconnecting the rings (6, 7) to each other. The rod (8, 9, 10) is split into two rod sections (11, 12) connected together by a joint (21) and the joint (21) includes a pivot mount (22) having a predetermined axis (x—x) for the angular displacement of the rod sections (11, 12), and a sliding mount (23) according to a pre-determined sliding direction (y—y) for offsetting the rod sections (11, 12).

An external fixation system and method for realigning, compressing or distracting broken bones has a planar ring element with an adjustable device having a body releasably mounted on the ring element. The adjustable device includes a first member for movement in a direction generally perpendicular to the ring element. A second member is pivotally connected to the first member for angular movement with respect to the ring. A third member is mounted on the second member for movement in a direction parallel to the second member and with respect to a circumference of the planar ring element. The method includes providing an external fixation system and inserting a k-wire through a first piece of bone and affixing the k-wire or half pin to the ring element. Then inserting a second k-wire or half pin through a second piece of bone and affixing the k-wire or half pin to an adjustable device. The pieces of bone are realigned, compressed or distracted by adjusting at least one of a first and second adjustable member forming the device.

A polymeric external fixator element, such as a rod or a pin or a clamp, has at least one contacting surface. At least one of the contacting surfaces of the element responsible to establish connection between the element and a different external fixator element is provided with a rough ablated structure. The clamping can be improved if one of the polymeric elements comprise fibers having fiber parts protruding above the surface.

A multi-purpose external fixator (1) comprises at least one screw (2) to be implanted in a bone fragment (3) and a frame (7), in turn comprising at least one clamp (8) and at least one bar (9); the clamp (8) comprising a central body (11), in which a slot (12) is made for connection to the screw (2), an element (13) for locking the screw (2) in the slot (12) and a lever (14) for operating the locking element (13); the lever (14) is hinged to the central body (11) and can move away from and towards an end position for engagement of the locking element (13) and stable connection of the screw (2) to the slot (12); in the end position the lever (14) and the screw (2) are positioned in a T-shaped configuration relative to each other, in which the lever (14) forms a grip for implanting the screw (2) in the bone fragment.

A support structure for use with an external fixator assembly including, but not limited to, a fixator assembly for the ankle area of the body which may further include an ankle stabilization portion. The support structure is similar in function but distinguishable in structure from a “halo-ring” and comprises a base having a substantially annular configuration and being operatively disposed in at least partially surrounding relation to a leg area which corresponds to the stabilized ankle area. An extension assembly includes at least one but preferably a plurality of two elongated extension members extending outwardly from the base and in spaced relation to and substantially aligned with the ankle stabilization portion. The base and the two extension members are structured for connection to a plurality of struts which may be variably and selectively disposed in interconnecting relation to the ankle stabilization area and/or other portions of the external fixator assembly.

The invention relates to a self-locking joint for an external bone fixator and a regulating type bionic external bone fixator. The self-locking joint for the external bone fixator comprises a self-locking joint head A, a self-locking joint head B, a self-locking joint pin shaft and a spherical pad, wherein the self-locking joint head A comprises a spherical self-locking joint hinge seat and a threaded self-locking joint connector A arranged on the spherical self-locking joint hinge seat, the self-locking joint head B comprises a self-locking joint hinge plate and a threaded self-locking joint connector B arranged on the self-locking joint hinge plate, the self-locking joint hinge plate is connected with the spherical self-locking joint hinge seat through the self-locking joint pin shaft in a hinge mode, the diameter of the self-locking joint hinge plate is smaller than the diameter of the spherical self-locking joint hinge seat, and the spherical pad is sleeved on the threaded self-locking joint connector B and is contacted with the arc-shaped surface of the spherical self-locking joint hinge seat. The regulating type bionic external bone fixator with the self-locking joint has the advantages of simple structure, light weight, low cost, regulating capability and flexible operation, and targeted and personalized combination and regulation can be realized.

Provided are a fast extension rod for a bone external fixing device and an adjustable bionic bone external fixing device. The vertical fast extension rod for the bone external fixing device comprises a vertical fast extension rod sleeve, a vertical fast extension rod threaded rod, a vertical fast extension rod pin, a vertical fast extension rod connecting nut, a vertical fast extension rod adjusting nut and a vertical fast extension rod locking claw, wherein a vertical fast extension rod locking sleeve is sleeved on the vertical fast extension rod locking claw. An inclined fast extension rod for the bone external fixing device comprises an inclined fast extension rod sleeve, an inclined fast extension rod threaded rod, an inclined fast extension rod pin, an inclined fast extension rod adjusting nut and an inclined fast extension rod locking claw, wherein the an inclined fast extension rod locking sleeve is sleeved on the inclined fast extension rod locking claw. By means of the adjustable bionic bone external fixing device adopting the fast extension rod for the bone external fixing device, mechanical energy and bioenergy can have good compatibility, and requirements for conducting firm fixing at an early stage of fracture, providing axial and comprehensive stress stimulating elastic fixing at a middle stage of the fracture and providing balanced fixing at a rear stage of the fracture are met.