13 results about "Tissue expansion" patented technology

A tissue expansion sleeve comprising a tube formed of woven polymer; the woven polymer forming helical trusses; and a biologically active material disposed on an outer surface of the tube.

The present application relates to the technical field of medical devices, in particular to a tissue expansion catheter with a fixing structure. The tissue expansion catheter comprises an outer tube and an inner tube, the inner tube is arranged in the outer tube, the end of the outer tube is fixedly connected with a communication member fixedly connected with the inner tube, the communication member is fixedly connected with an expansion outer cylinder and an expansion inner cylinder, and the three members together form a filling cavity, the expansion inner cylinder is fixedly connected with an inner support body which is annularly distributed and in contact with the inner tube, and the side of the inner support body away from the inner tube penetrates through the expansion inner cylinder and is provided with two groups of protrusions which are symmetrically distributed. The present application utilizes the protrusions to pull the inner side of the expansion outer cylinder, so that the surface of the expansion outer cylinder after expansion generates a pit, and then when the expansion outer cylinder is expanded and pressed at a lesion position, the lesion tissue is embedded in the pit on the surface of the expansion outer cylinder, thereby inhibiting the sliding of the expansion outer cylinder caused by the pressing, and at the same time maintaining the smoothness of the surface of the expansion outer cylinder in the retracted state, which is beneficial to the movement of the expansion outer cylinder in the patient's body.

Methods and apparatus disclosed treat pain and mobility impairments by applying controlled subatmospheric pressure to skin over muscle tissue or joints during volitional muscle contractions against adaptive therapist resistance. Domes with basal openings sealing against skin perimeters, are evacuated to 13-90% of atmospheric pressure. Some embodiments have 3-10 second contraction intervals repeated at least three times per subatmospheric treatment cycle, before pressure is ramped to ambient pressure over at least 2 seconds. Results are improved range of motion, muscle strength, and pain reduction. Apparatus embodiments include vacuum manifolds, sensors for pressure and tissue distension, and optional integrated electrodes for performing TENS / STIM.

A system for ablating surface tissue of a patient is provided. The system includes a console and an ablation catheter fluidly attached to the console. The console includes an ablative fluid supply, a neutralizing fluid supply, an injectate fluid supply, a pump assembly, and a vacuum supply. The ablation catheter includes an expandable functional assembly, a tissue expansion subsystem for expanding sub-surface tissue in the intestine of the patient, and a tissue ablation subsystem for ablating surface tissue in the intestine of the patient. Methods of ablating surface tissue are also provided.

This invention provides a device for external expansion of soft tissue on one side of the face, comprising pairs of spaced-apart fixators, with multiple supports connected between each pair of fixators, and at least one end of each support slidably connected to a fixator. Each support is equipped with at least one elastic traction device, which is equipped with a negative pressure suction cup. In this invention, by adjusting the positions of the supports and the elastic traction device, the negative pressure suction cup periodically applies mechanical traction before surgery, causing local tissue expansion and relaxation. This mechanically induces and stimulates cell regeneration, gently expanding the soft tissue volume and providing space for subsequent filling.

A tissue-separating device, system, and method utilizing an expandable member which expands against tissue to be separated at a treatment site. The expandable member has an invertible portion extendable within and evertible out of a lumen of a tubular elongate member. An anchoring portion of the expandable member is anchored with respect to an exterior of the tubular elongate member to anchor the device with respect to the treatment site so that expansion of the expandable member against tissue does not cause rebound of the expandable member. The tubular elongate member may include one or more radially extending flow holes to inflate the anchoring portion prior to everting and expanding the invertible portion of the expandable member. A tether may be used to assist advancement and retraction of the invertible portion of the expandable member. The tether may define a lumen through which an additional device may be extended.

A multi-stage dilator and cannula assembly for use in surgical procedures, including minimally invasive surgical procedures, to provide tissue dilation and opening of a portal to enable the surgeon to access and provide treatment to anatomical feature of interest.

The invention discloses a 3D printing cavernous body organ-like model capable of simulating an erectile physiological process, and belongs to the technical field of tissue engineering and regenerative medicine. The hydrogel is formed by photo-curing 3D printing of a dual-network hydrogel material formed by blending a pig cavernous body acellular extracellular matrix pregel solution and polyethylene glycol diacrylate, and has a bionic sine curve expansion structure; micron-sized grooves for guiding the directional arrangement of smooth muscle cells are formed in the surface of the micro-sphere, and an elliptical cavity for providing structural support is formed in the micro-sphere. A pig cavernous body dECM pre-gel solution is used as a base material, so that a microenvironment for living of cells in a body can be effectively simulated; by regulating and controlling the proportion of PEGDA, the mechanical property of the model is matched with that of a natural cavernous body tissue. The organ model can reproduce the NO-mediated smooth muscle cell relaxation and tissue expansion physiological process in vitro, and provides an effective in-vitro platform for researching the pathological mechanism of erectile dysfunction, screening drugs and developing a novel treatment method.

A tissue expander comprising: a port assembly including a drain port and a fill port, a magnet housing assembly fitted to the port assembly, the magnet housing assembly including a single magnet having a magnetic field that is detectable on an exterior surface of a biological tissue of a patient; a shell defining the interior cavity of the tissue expander; and a drain assembly in fluidic communication with the drain port via the drain tubing.

A tissue expander includes a shell defining an interior cavity, a first port in fluid communication with the interior cavity, a second port, and a magnet. The magnet is positioned along an axis extending through the first port and the second port. The magnet produces a magnetic field to enable location of the first port and the second port.

The present invention relates to a puncture device that is arranged for being advanced to a puncture site through the human vasculature, the puncture device comprising: a puncture means, the puncture means comprising a distal end that is arranged for creating a puncture in a patient's tissue, a sheath, the sheath being arranged so as to surround the puncture means, the puncture means being slidably arranged inside the sheath, a tissue expansion means, the tissue expansion means being arranged so that it can be selectively activated, wherein in the activated state, the tissue expansion means pushes away the patient's tissue to thereby allow a re-orientation of the puncture means.

The utility model discloses an external nasal dilator, relates to the technical field of human body external tissue dilation, and solves the problems that an external sticker in the prior art is easy to fatigue, causes the reduction of dilation force, is not suitable for long-time use and can only be used once. The dilator comprises a dilation strip, the dilation strip is provided with at least two detachable position-adjustable clamping pieces, the clamping pieces are magnetically attracted with detachable adhesive pieces, the dilation strip is composed of a memory rebound body and can provide stable and lasting dilation force for the nose for a long time, in addition, the dilator is externally used, so that no foreign body sensation exists in the nasal cavity of a user, and the dilator is convenient to use. The positions of the clamping pieces can be adjusted according to different requirements of users, and the clamping pieces can be detached and replaced, so that the expansion strip can be used repeatedly.

A surgical access system comprising a tissue dilation assembly and a tissue retraction assembly, both of which may be equipped with one or more electrodes for use in detecting the existence of (and optionally the distance and / or direction to) neural structures.