966 results about "Retainer" patented technology

A polyaxial body is selectively removable from a pedicle screw in a spinal fixation system without disruption of the screw's placement in the patient's spine. The polyaxial body according to various embodiments of this invention may be locked relative to the screw head and coupled to the spine rod without deformation of the screw or body components while still allowing for subsequent removal of the body from the screw head. The head of the pedicle screw is threadably engaged with a retainer ring on the polyaxial body thereby permitting selective removal of the body from the screw head without disrupting the placement of the screw in the spine. This allows for the pedicle screw to remain in the spine as the fixation system is adjusted as required by the surgeon for subsequent and reliable reanimation.

A method for applying a desired shape to an orthodontic archwire includes the steps of obtaining a numerical description of the desired shape of an orthodontic archwire, generating a description of the design of a fixture basing on the numerical description, manufacturing a fixture basing on this description of the design, constraining a wire into the fixture and applying an adequate treatment to the wire in order to cause it to adopt the shape dictated by the fixture.

A medical appliance for the treatment of obstructive sleep apnea in a patient, the appliance comprising: a securing device configured to be removably affixed to the patient's jaw; and a biasing member which is insertable behind the soft palate and/or the base of the patient's tongue, thereby providing for the flow of air in the nasopharyngeal airway; wherein the securing device is connected to the biasing member to allow insertion and/or removal of the biasing member from the nasopharyngeal airway.

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.

An enteral feeding assembly is described which includes a base and a catheter positioned through the base. A portion of the catheter extends distally away from the base, and has a retainer provided on a distal end of the catheter. The retainer includes a plurality of struts having a flexible, preformed configuration which cooperate to form at least a portion of a spherical shape with openings between the struts. A shroud is positioned over at least a proximal portion of the struts to prevent the struts from causing irritation or embedding in a body lumen. The retainer is movable between an insertion configuration and a deployed configuration. An obturator and actuator are used to move the retainer between positions. A method for inserting and removing an enteral feeding assembly is also provided.

A wrench comprises a handle and a head extending from the handle. A peripheral wall defining a hole in the head includes a compartment. An annular groove is defined in an end of the peripheral wall defining the hole. The annular groove is partially coincident with the compartment. A pawl is slidably received in the compartment and biased to engage with a gear wheel in the hole. A switching member is partially mounted in the hole for moving the pawl when switching of the ratcheting direction is required. A retainer ring is partially engaged in an annular groove in the switching member and partially engaged in the annular groove of the head. The retainer ring is retained in place by a wall defining the compartment. The switching member is not moved when the pawl moves as a result of free rotation of the wrench.

The invention relates to a damping joint for an external bone fixator and a regulating type bionic external bone fixator. The damping joint for the external bone fixator comprises a damping joint head A, a damping joint head B, a damping joint pin shaft, a gasket groove, a butterfly gasket, a U-shaped fixing clip and a gasket cover, wherein the damping joint head A comprises a spherical damping joint hinge seat and a threaded damping joint connector A arranged on the spherical damping joint hinge seat, the damping joint head B comprises a damping joint hinge plate and a threaded damping joint connector B arranged on the damping joint hinge plate, the damping joint hinge plate is connected with the spherical damping joint hinge seat through the damping joint pin shaft, and the diameter of the damping joint hinge plate is smaller than the diameter of the spherical damping joint hinge seat. The regulating type bionic external bone fixator with the damping 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.

A combined, reconfigurable, multi-purpose external orthopedic fixation device and multi-functional prosthesis, for use alternatively as an external orthopedic fixation device for providing support and/or traction for a sprained, fractured, or broken limb of a warm-blooded animal, especially a human being, and as an artificial prosthesis for providing both substitute elementary limb functionality and substitute multi-purpose specific task functionality of a limb, especially an upper limb, such as a finger, hand, wrist, forearm, or elbow, of a warm-blooded animal, especially a human being, is disclosed. The apparatus includes at least one flexible tubular elongate member having a flexible strengthening rod therein, and a pair of end caps. Other embodiments of the apparatus further include one or a plurality of one or more additional elements including a cushioning support that is slidable along the elongate member; a stop for fixing the position of a cushioning support; a uni-dimensional joint for connecting ends of one or more elongate members together in a two-dimensional configuration; a two-dimensional joint for connecting ends of two or more elongate members together in a three-dimensional configuration; a panel of webbing material for supporting a limb; a rigid support member generally contoured to and for supporting a specific limb; and a variety of implements for performing certain useful functions, such as personal hygiene and grooming, eating, writing, and simple chores, that can be attached to one or more ends of an elongate member in place of the end caps.

An apparatus and method of monitoring healing and/or assessing mechanical stiffness of a bone fracture or the like is disclosed. The method comprises (a) recording a strut length of a variable length strut with an indicator pin, wherein the strut is on an external fixator is in a no or minimal load situation; (b) inputting such strut length, mounting parameters, and frame parameters into software to determine a first pose and position of the fixator; (c) positioning at least one indicator clip on each side of the indicator pin; (d) applying a load or torque to the bone fracture; (e) recording strut length of the variable length strut in loaded situation; (f) inputting such strut length, mounting parameters, and frame parameters into software to determine for a second pose and position of the fixator in a loaded situation; (g) solving for a change in pose and position by subtracting the second pose and position from the first pose and position; and (h) solving for the stiffness of the bone fracture by dividing the load applied to the bone fracture by the change in position and pose. An apparatus and indicator clip are also disclosed.

The invention discloses a conveying device of a covered stent. The conveying device of the covered stent comprises a guiding head which is provided with a hollow cavity in the axial direction, a guiding wire pipe which is communicated with the hollow cavity, a protective sleeve, an external pipe and a fixing device, wherein one end of the guiding wire pipe is fixedly connected with the rear end of the guiding head; the protective sleeve is sleeved outside the external wall of the guiding wire pipe and is capable of moving along the axial direction of the guiding wire pipe; one end of the protective sleeve is connected with the rear end of the guiding head; the external pipe is sleeved outside the external wall of the guiding wire pipe and is capable of sliding along the axial direction of the guiding wire pipe; the external pipe is sleeved outside at least partial of the external wall of the protective sleeve; and the fixing device is sleeved outside the external wall of the guiding wire pipe and is capable of moving along the axial direction of the guiding wire pipe. The conveying device of the covered stent is characterized in that a groove is formed on the external wall of the fixing device; a portion of the groove, which corresponds to the covered stent, is inserted into the fixing device and the front end of the insertion portion and the rear end of the insertion portion abut against the wall of the groove; space for accommodating the inserted potion is formed between the protective sleeve and the guiding wire pipe; and a position on the fixing device, which is provided with the groove, is arranged in the protective sleeve. The conveying device of the covered stent is applicable to conveying the covered stent into a body and performing releasing during an operation.

The invention discloses a bearing retainer and a machining technique thereof. The technique mainly comprises: blanking perimeter and height required by the retainer at a time, moulding all cage pocketstructures of the retainer at a time, and punching all the cage pockets into concave cage beams provided with groove structures at a time; circling the retainer bracket with circling mould, and welding the butt ports of two ends of the circle to form an integral bearing retainer structure. The machined bearing retainer bracket is in the integral bearing retainer structure formed by manufacturinginner and outer ring beams, cage pockets, concave cage beams between adjacent cage pockets, and boundary beams for connecting the concave cage beams to the space between the inner and outer ring beamswith the same mild steel plate through the previous technique so that the invention has the advantages of reducing accumulated technique deviations, improving precision and reliablity of products, solving the problem of high cost of material waste in conventional bearing machining technique, fully increasing the utility rate of material, and further improving the production efficiency of the bearing retainer.