49 results about "Meniscal tissue" patented technology

Electrosurgical methods, systems, and apparatus for the controlled ablation of tissue from a target site, such as a synovial joint, of a patient. An electrosurgical probe of the invention includes a shaft, and a working end having an electrode array comprising an outer circular arrangement of active electrode terminals and an inner circular arrangement of active electrode terminals. The electrode array is adapted for the controlled ablation of hard tissue, such as meniscus tissue. The working end of the probe is curved to facilitate access to both medial meniscus and lateral meniscus from a portal of 1 cm. or less.

A single unit surgical fastener and system and method for repairing torn meniscus tissue in an arthroscopic, all-inside procedure. The desired length of the single unit surgical fastener is first determined by measuring the distance from the interior of the meniscus across the tear and across the joint capsule, and then a single unit surgical fastener of desired length is then inserted across the tear in one or more places through a curved, slotted cannula.

Methods and apparatus for treating meniscal tissue damage are disclosed, including a biocompatible meniscal repair device comprising a stent. The tissue repair device is adapted to be placed in contact with a defect in the meniscus and can preferably provide a structure for supporting meniscal tissue and/or encouraging tissue growth through contact with vascularized portions of the meniscus or as a conduit for introduction of exogenous healing therapies.

Systems and methods for repairing tears in soft tissue, e.g., meniscal tissue, by employing cinch stitching. More specifically, the present invention provides apparatus and methods for meniscal repair using a suture implant construct. The suture implant construct includes a first and second implant which are connected to each other via a length of suture. The implants are designed to be loaded on external surfaces of the first and second trocars.

Methods and devices are provided for repairing a tear in a meniscus. A pair of fixation member each entailing a preformed knot configuration coupled together by a suture length. The fixation members are placed on the meniscal tissue with the suture length spanning the tear, the knot configurations are expanded to form anchoring knots and the suture length is shortened to close the tear.

Methods for repairing a meniscus, and particularly a torn meniscus. A method of repairing a meniscus may include using a suture passer to pass a suturing element from the region between the superior surface of the meniscus and the femoral condyle, through the meniscus tissue, into the region between the inferior surface of the meniscus and the tibial plateau, across the inferior surface of the meniscus, and back to the superior surface of the meniscus, without deeply penetrating the posterior capsular region of the knee. Equivalently, the suture element may be passed from the inferior surface of the meniscus to the superior surface and back to the inferior surface.

A system and surgical methods for repairing tears in meniscal tissue using meniscal darts. In a preferred embodiment, the system includes a cannulated insertion sheath, a meniscal dart, and a disposable dart driver preloaded with a meniscal dart at its distal end. The insertion sheath is located near a meniscal tear, and sharp prongs on the tip of the sheath are used to secure and position the central fragment of the torn meniscus. The dart driver with a preloaded dart is advanced through the cannulation of the insertion sheath such that the preloaded meniscal dart at the distal end of the driver is inserted through the meniscal tear.

Provided herein is a biocompatible implant for meniscus tissue engineering. Particularly, the biocompatible implant comprises a multi-layered crescent-shaped silk fibroin scaffold, in which each layer comprises distinct pore size and/or pore orientation, e.g., to mimic native meniscus complex architecture. Accordingly, the biocompatible implant can be used for repairing any meniscal defect or promoting meniscal regeneration in a subject.

Methods of repairing knee meniscus tears are described which use suture passer devices and suture shuttles. These methods may be used with continuous suture passing, so that the suture passer device may remain on or in the tissue while passing a suture shuttle, and therefore a suture, back and forth from one side of the tissue to the other. These methods may be used minimally invasively for repairing meniscus tissue while avoiding further damage to the meniscus.

A method and apparatus for replacing damaged meniscal tissue includes a meniscus implant including a porous body having a plurality of interconnected open micro-pores and one or more open cavities for receiving meniscal tissue. The interconnected micro-pores are arranged to allow fluid to flow into the porous body and are in fluid communication with the one or more open cavities.

A composite for treating an articular defect includes a hyaluronic acid derivative; and at least one member of the group consisting of a cell, a cellular growth factor and a cellular differentiation factor, which is impregnated in, or coupled to, the hyaluronic acid derivative. In one embodiment, carboxyl functionalities of the hyaluronic acid derivative are each independently derivatized to include an N-acylurea or O-acyl isourea, or both N-acylurea and O-acyl isourea. In another embodiment, the hyaluronic acid derivative is prepared by reacting an uncrosslinked hyaluronic acid with a biscarbodimide in the presence of a pH buffer in a range of between about 4 and about 8. The composite can be used for regenerating or stimulating regeneration of meniscal tissues in a subject in need thereof.

The invention provides a 3D (three-dimensional) bioprinting preparation method for a tissue engineering meniscus scaffold and provides a novel technological method for tissue engineering meniscus research. The method includes the steps of 1), constructing a three-dimensional model of meniscus so as to obtain a CAD (computer-aided design) data model with multi-layer sections; 2), preparing a degradable biological scaffold material P (LLA-CL); 3), adding the scaffold material P (LLA-CL) into a cartridge of a 3D bio-printer, and printing to obtain the three-dimensional meniscus scaffold capable of loading cells according to the CAD data model; 4), injecting growth factors into the three-dimensional meniscus scaffold through the 3D bio-printer so as to obtain meniscus tissues; 5), completing meniscus transplantation.

An assembly for meniscal repair including a first tissue fixation member configured to secure a meniscal tissue, a suture anchor having a proximal end, a distal end, a central axis defined therethrough, an eyelet on the proximal end of the suture anchor, and a textured outer surface, and a first suture configured to be coupled to the first tissue fixation member and configured to be received through the eyelet of the suture anchor.

The invention discloses a meniscus suture positioning guider which comprises a positioning arm and a guide tube. A circular hole or groove is formed in the front end of the positioning arm and corresponds to a pointed end of a meniscus puncture needle to penetrate through the meniscus puncture needle pointed end, a base in the lower portion of the positioning arm is of a hollow structure, the guide tube can be inserted into the base, the guide tube is of a hollow structure, and the meniscus puncture needle can be inserted into the guide tube. The meniscus suture positioning guider has the advantages that the structure is simple, the guider is easy and convenient to operate, the inner edge of a meniscus torn portion is pressed downwards by the front end of the positioning arm in a meniscus injury suture operation, a meniscus suture needle can precisely penetrate through the guide tube and the inner edge of the meniscus torn portion to reach the circular hole or groove in the front end of the positioning arm, and the defects that the meniscus puncture needle is blindly penetrated and lack of precision, and blood vessels, nerves, meniscus tissue and the like are damaged due to lots of punctures are overcome. The guider shortens time for the meniscus suture operation clinically, simplifies operation steps and improves operation quality.

The present invention relates to a method of preparing a tissue matrix and its subsequent use in the replacement and/or repair of a damaged or defective meniscus. The invention also provides meniscal tissue that is substantially decellularised.

The invention provides a porous meniscus substitute modeling and a preparation method thereof. The modeling method comprises the following steps: scanning the meniscus part of a patient by using CT, performing image processing on a scanned image to obtain a meniscus model matched with the patient, performing parameter acquisition on the concentrated compression stress, shear stress and stress distribution of the femur, tibia and meniscus part of the patient at the meniscus, and setting the pore shape, pore diameter and porosity of the pores in the porous meniscus substitute by adopting a parametric modeling mode to obtain a final meniscus substitute model. The model is subjected to a 3D printing or injection molding process to obtain the porous meniscus substitute. The porous meniscus substitute prepared by the invention can be matched with the meniscus of the user, is favorable for rapid formation of meniscus tissues after transplantation, and has the biomechanical properties meetingthe requirements of knee joint parts; and in addition, through the cooperation of hydrogel and a porous scaffold, the effects of transmitting load, absorbing oscillation and improving the joint stability of the meniscus substitute can be greatly improved.

A composite joint implant device replaces or repairs damaged meniscus tissue in an animal or human. In one embodiment, a composite joint implant comprises a polymeric body which is reinforced with a pre-formed engineered ligature mechanism. The ligature reinforces the polymeric body around the circumference and is used for attaching the device within an animal or human body. The ligature mechanism internally supports the transmission of vertical loads into tensile stresses. The ligature mechanism can be coated with a compatible material to promote integration with the polymeric body and coated with an encapsulation material.