33 results about "Ossicular prosthesis" patented technology

An ossicular prosthesis delivery system having an ossicular prosthesis including an enlarged head and a shaft axially, moveably mounted to the head to adjust shaft length. An elongate main body having an operating portion, including a cylindrical through bore, connected to an adjusting portion, including a generally semi-cylindrical upwardly opening channel coaxial with the bore. An end wall at a distal end of the adjusting portion includes a through passage coaxial with the channel and an upwardly opening cavity. An elongate cylindrical plunger has a claw at one end. The plunger is received in the bore with the claw in the channel and an opposite end extending outwardly of the operating portion. The ossicular prosthesis' shaft is positioned in the channel with the head received in the cavity and the plunger is rotatable in the bore to capture the shaft and is reciprocally moveable in the bore to adjust shaft length of the ossicular prosthesis.

A passive ossicular prosthesis includes a first and second fastening element for connection to the tympanic membrane. A connecting element connects the fastening elements in a sound-conducting manner. The connecting element includes a receiving part and an insertion part. The insertion part is inserted into a receiving opening of the receiving part. The receiving part encloses an end section of the insertion part in the manner of a clamp by way of two opposing, parallel legs disposed parallel to a shank axis of the connecting element. The legs have catch devices that fix the enclosed end section discrete spatial positions relative to the shank axis.

An ossicular prosthesis is described which includes an elongated prosthesis member having a proximal end and a distal end. A cochlea striker mass is at the distal end of the prosthesis member and includes an outer striking surface for coupling vibration of the striker mass to an outer cochlea surface of a recipient patient. A locking clamp is at the proximal end of the prosthesis member and includes a clamp strap having a fixed end and a free end, and a locking head at the fixed end of the clamp strap which has a strap opening for insertion of the free end of the clamp strap. The clamp strap passes around an ossicle of the middle ear in a closed loop and is fixedly engaged by the locking head such that acoustic vibration of the ossicle is coupled by the prosthesis member to the cochlea surface.

An ossicular prosthesis formed as a sound-conducting, elongated prosthesis body has a first coupling element designed as a tympanic membrane top plate or a clip or a connecting piece to an actuator end piece of an active hearing implant and a second coupling element provided with an access opening into a receiving space designed as a bell or a clip for a mechanical connection of the prosthesis to the head of the stapes. The second coupling element has a backing section on an inner surface of the receiving space as an axial extension of the prosthesis body. The backing section protrudes from the prosthesis body into the receiving space. In an implanted state, the backing section bears against a head of the stapes and prevents a formation of a hollow space between the stapes and an inner surface of the receiving space in an axial extension of the elongated prosthesis body. As a result, additional degrees of freedom are obtained for individualized adaptation to anatomical circumstances of a specific patient in terms of shape, size and position of the patient's stapes bone.

A middle ear ossicle prosthesis in which the component for ossicular attachment comprises a surface bearing a plurality of discrete projections facing the ossicle to which it is attached which minimize total contact between the prosthesis and the ossicle. The prosthesis may comprise a loop forming a partial circle for encircling an ossicle, a piston for transmitting vibrations from the loop to the inner ear, and a rod solidly connecting the loop to the piston. The loop may have an upwardly turned end to facilitate placement of the loop over the ossicle. The projections may be provided in one row, two rows, or may be otherwise arrayed, and may be dissimilar from one another in configuration and dimensions.

An ossicular prosthesis has a first fastening element for connection to the tympanic membrane or a component of the ossicular chain, a second fastening element for connection to a further component of the ossicular chain, or directly to the inner ear, an elongated connecting element that connects the two fastening elements in a sound-conducting manner and includes an adjusting device for adjusting the axial length of the prosthesis and including at least two partial strands that extend symmetrically to the longitudinal axis of the connecting element, are extendable and/or compressible in the axial direction, are permanently plastically deformable, and are folded into a plurality of loops transversely to the longitudinal axis before being deformed. As a result, a relatively simple design of the adjusting device considerably reduces the number of different prostheses that must be kept on hand, while ensuring that the prosthesis may be optimally adapted for a specific case.

Ossicular replacement prostheses are manufactured from a non-biodegradable shape memory polymer. Such prostheses can include TORPs, PORPs, and incudo-stapedial joints (ISJs). The prostheses are reshaped upon application of a stimulus to capture a portion of one or more ossicles. The force of capture of a reshaped polymeric prosthesis is less than a comparable reshaped shape memory alloy prosthesis and thereby prevents recipient discomfort and/or pressure induced necrosis of the bone. In addition, biocompatible shape memory polymers can be designed with recoverable strain that is orders of magnitude higher than shape memory alloys. Furthermore, prostheses can be manufactured in a single size and easily trimmed or otherwise modified by the surgeon during the implantation procedure to tailor the prosthesis in size and/or shape for the particular anatomy. Such modification does not negatively effect the ability of the prostheses to engage the ossicle.

Disclosed herein is a customized ossicular prosthesis suitable for treatment of conductive hearing loss due to ossicular chain defects, and a method and system for manufacturing the same. Medical imaging equipment can detect specifically designated landmarks in normal human middle ear ossicles, including significant anatomic differences in those structures. Those anatomic features are used to generate a customized ossicular prosthesis specifically configured for a particular patient's anatomy using 3D printing techniques and devices.

A system for adjusting an adjustable ossicular prosthesis including an ossicular implant and an adjusting device is provided. The ossicular implant includes a first fixation element, an elongated member extending from the first fixation element with a plurality of notches, a receiving member receiving a portion of the elongated member, and a resilient arm coupled to the elongated member. The resilient arm has a locked position fixing the receiving member relative to the elongated member and the length of the implant, and an unlocked position. The adjusting device includes first and second arms having first and second sets of jaws coupled thereto, the first and second sets of jaws configured to selectively engage the implant, the second set of jaws being configured to position the resilient arm in the unlocked position when engaging the receiving member of the implant, and an adjustment mechanism to adjust the length of the implant.

The invention discloses an auditory ossicle fixing stent which comprises an elliptical disc. The elliptical disc is matched with the inner wall and the outer wall of the middle ear cavity and the elliptical pit above a tympanic nerve, a through hole is formed in the center of the elliptical disc, the through hole is arranged in a penetrating manner in the thickness direction of the elliptical disc, and the diameter of the through hole is 0.2-0.9 mm, the through hole is used for being matched with the rod portion of an ossicular prosthesis, the elliptical disc is provided with an empty groove,the empty groove extends from the periphery of the elliptical disc to the through hole, and the width of the empty groove is 0.1-0.5 mm. The auditory ossicle fixing stent is applied to clinical auditory ossicular chain reconstruction surgery, is suitable for auditory ossicle prosthesis implantation (aiming at the condition of total auditory ossicle replacement), corrects the movement direction ofan auditory ossicle prosthesis base when the auditory ossicle prosthesis base is separated from the center of an operation fixing position of the auditory ossicle prosthesis base, assists in fixing the auditory ossicle prosthesis, prevents the auditory ossicle prosthesis from escaping, meets the bone conduction of the auditory ossicle prosthesis and ensures the movement of the auditory ossicle prosthesis within a certain range.

The invention discloses a low-strain five-claw ossicular prosthesis which comprises a top disc, a connecting rod and a stirrup bone clip. Fillets are arranged on the top disc, a sunken cavity is formed in the bottom of the top disc, the top disc is in a cover shape, and an annular edge is formed at the periphery of the top disc; the top disc and the connecting rod are connected through a socket joint; the stirrup bone clip is of a five-claw structure; by changing the structure of the top disc, when the top disc makes contact with a tympanic membrane, contact strain can be reduced, and damage caused by an acute angle generated during oblique placement to the tympanic membrane is avoided; the top disc and the connecting rod are connected through the socket joint, the angle formed between thetop disc and the connecting rod can be flexibly and conveniently adjusted, and the shearing stress of artificial otosteon to the tympanic membrane is buffered during different middle ear pressure changes; the stirrup bone clip is arranged to be of the five-claw specific thickness structure, the degree of tightness is suitable when the stirrup bone clip is connected with the stirrup bone, and thestirrup bone cannot be damaged due to excessive tightness and cannot be disengaged due to excessive looseness.

Ossicular prostheses, and methods for producing such, are disclosed for treatment of middle ear damage caused by a malady of the middle ear such as cholesteatoma. The ossicular prostheses comprises a strut component attached to a disc via a rigid or flexible connecting joint. The strut is attachable to a head or footplate of a subject's stapes. The disc is attachable to the subject's existing tympanic membrane, or, alternatively, to an artificial tympanic membrane graft. In some embodiments, a scaffold is used to support the ossicular prosthesis and the tympanic membrane graft.

The invention discloses an auditory ossicle prosthesis. The auditory ossicle prosthesis comprises a middle rod; a supporting plate and a connector are arranged at the two ends of the middle rod respectively; the supporting plate is used for being connected with the tympanic membrane; the connector is used for being connected with the stapes; the supporting plate and the connector are both integrally formed together with the middle rod; the included angle between the middle rod and the plane where the supporting plate is located is smaller than 90 degrees; the supporting plate is formed in an oval shape corresponding to the shape of the tympanic membrane; the connecting point of the supporting plate and the middle rod does not coincide with the circle center of the supporting plate; and the middle rod is a telescopic elastic rod-shaped piece. All the structures are integrally formed, the effect of transmitting vibration of the tympanic membrane is good, and the postoperative recovery effect of a patient is guaranteed.

A transport device for receiving and securely holding an ossicular prosthesis for implantation in a middle ear during transport to an operating surgeon for replacing or bridging at least parts of a component of a human ossicular chain, the transport device has a flat base plate of thin metal sheet having a thickness of substantially half a millimeter, at least one suspending device connected to the base plate and twistable using fine segments and integrated in the base plate for receiving and holding the ossicular prosthesis, and the connecting element which connects a first fastening element of the ossicular prosthesis used for mechanical connection to a tympanic membrane or a component of the ossicular chain with a second fastening component on another end used for mechanical connection to a further component or parts of a component of the ossicular chain or directly to an inner ear so that the first and second fastening elements are connected by the connecting element in a sound-conducting manner, wherein the suspending device is configured so that it aligns with the surface of the base plate during manufacture of the transport device and for suspension of the ossicular prosthesis is rotatable relative to an ossicular prosthesis lying-flat production state by substantially 90° relative to the base plate by plastic deformation of the segments and then extends above the surface of the base plate.