8 results about "Invagination" patented technology

The utility model relates to the field of medical supply devices, in particular to a polyisoprene gasket capable of improving the inward sinking risk, which comprises an inner cover wrapped on a bottle opening of a medical bottle and an outer cover tightly attached to the inner cover, and a rubber head convenient for a needle to pierce is arranged at the center position of the outer cover. The rubber head is provided with an anti-sinking assembly matched with the inner cover. The pressing part of the anti-sinking assembly abuts against the inner cover, so that the phenomenon of sinking is effectively improved, meanwhile, a medical medicine bottle does not permeate air, the use safety of medicine is guaranteed, meanwhile, acupuncture is convenient, and the phenomenon of medicine waste is reduced.

The utility model discloses an embryo staining operation dish which comprises a base, a hollow structure is arranged in the middle of the base, a transparent piece is embedded in the hollow structure, an operation dish body is arranged on the transparent piece in an overlapping mode, and the base and the operation dish body are connected in a matched mode through a limiting mechanism. Six recessed grooves are formed in the upper surface of the operation dish body, the vertical section of each groove is of a trapezoidal structure with the wide upper portion and the narrow lower portion, an upper cover is connected to the upper portion of the operation dish body in a clamped mode, the grooves are designed to be of the trapezoidal structures, embryos can be effectively fixed, the embryos are prevented from being lost in the operation processes of culturing, washing, dyeing and the like, and the operation dish is convenient to use. The operation dish is simple in structure and convenient to use, embryo concentration is facilitated, embryo loss is avoided, the position of an embryo can be found more easily under a microscope, meanwhile, the base and the operation dish body are designed, the base is used for protecting the operation dish body, the situation that the operation dish body is lost in use is effectively reduced, and the service life is relatively prolonged.

A multi-layer balloon membrane material (1) is described, which combines one or several layers of elastically deformable material (2) with one or several layers of plastically deformable, inelastic material (3), wherein the inelastic layers counteract the straightening properties of the elastic layers in the case of planar folding or bending of the balloon membrane material. In particular, the cross-sectional area of the eye- or channel-like structures (6) for guiding secretions or liquids, which are typically produced in the region of the plicated invagination of the balloon membrane with dimensional redundancy in organ cavities or body cavities, can be reduced, and in particular stabilized in the case of a periodic change in the balloon filling pressure, whereby an optimal sealing closure or packing result is achieved over as large a range of filling pressure amplitudes as possible.

The invention describes a multilayer balloon membrane material (1) which combines one or several layers of elastically deformable material (2) with one or several layers of plastically deformable, inelastic material (3), wherein the inelastic layers counteract the straightening properties of the elastic layers in the case of planar folding or bending of the balloon membrane material. In particular, the cross-sectional area of the eye- or channel-like structures (6) for guiding secretions or liquids, which are typically produced in the region of the plicated invagination of the balloon membrane with dimensional redundancy in organ cavities or body cavities, can be reduced, and in particular stabilized in the case of a periodic change in the balloon filling pressure, whereby an optimal sealing closure or packing result is achieved over as large a range of filling pressure amplitudes as possible.

A method for left atrial appendage (LAA) invagination, including:convexing a portion of the LAA wall into the LAA, wherein the convexing includes convexing the LAA wall portion by applying suction from a collapsible suction cup contacting the LAA wall on the LAA wall portion;grasping the convexed LAA wall portion within the LAA, following the convexing; invaginating the LAA at least partly into the left atria (LA) using the convexed LAA portion;wherein the grasping includes controllably collapsing the collapsible suction cup on the convexed LAA portion with a force sufficient to hold the convexed LAA portion during the invaginating.

The precator system may have two nesting components, each having one or more windows into which, for example, tubular organ tissue can invaginate when positioned in an open configuration. The invaginated tissue can be secured within the windows when the precator system transitions to a closed configuration. Closing the windows may, for example, act to clamp and pierce the invaginated tubular organ tissue within the windows, thereby securing the invaginated tubular organ tissue within the windows. In some cases, an axially extending spring may be positioned between the two precator systems, and when this assembly is implanted in a tubular organ, the axial extension of the spring may exert an expansive force on the tubular organ, which may stimulate its growth.

A method for closure of the left atrial appendage (LAA), including: placing an LAA reshaper in contact with an LAA wall or near the LAA wall; invaginating at least a portion of the LAA into the left atrium (LA); reshaping by the LAA reshaper the LAA during the invagination; fastening the invaginated at least a portion of said LAA; and retracting the LAA reshaper from the LAA.

Plicator systems may have two telescoping components that when arranged in an open configuration have one or more windows into which tissue of, for example, a tubular organ may be invaginated. The invaginated tissue may be secured in the window when the plicator system transitions to a closed configuration. Closing the window may act to, for example, clamp, pierce of the tubular organ tissue invaginated into the window, thereby securing the invaginated tubular organ tissue into the window. In some instances, an axially-expanding spring may be disposed between two plicator systems and when this assembly is implanted in a tubular organ, axial expansion of the spring may exert a distending force on the tubular organ, which may stimulate growth of the tubular organ.