6 results about "Organ cavity" patented technology

A method includes monitoring impedances of the plurality of the functional electrodes relative to a reference electrode while maneuvering a catheter within a cavity of an organ, the catheter comprising (i) a shaft having a distal end, and (ii) an expandable distal-end assembly coupled to the distal end of the shaft and comprising a plurality of functional electrodes. A direction vector is estimated from the monitored impedances, along which the catheter is free to advance within the cavity of the organ without obstruction by the tissue wall. The direction vector is displayed to a user.

A system includes a catheter and a processor. The catheter includes (i) a shaft for insertion into a cavity of an organ of a patient, (ii) an expandable distal-end assembly coupled to a distal end of the shaft and comprising splines fitted with spline-electrodes, (iii) a proximal position sensor and a respective proximate proximal electrode located both at a proximal end of the distal-end assembly, and (iv) an independent wire that extends at the distal tip, with a distal position sensor and a respective proximate distal electrode located both at a distal end of the independent wire. The processor is configured to estimate locations of one or more of the spline-electrodes by performing impedance measurements on the one or more of the electrodes, and to calibrate the impedance measurements based on signals received from the proximal position sensor and the distal position sensor and the respective proximal and distal electrodes.

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.

A system includes a catheter and a processor. The catheter includes a distal-end assembly coupled to a distal end of a shaft for insertion into a cavity of an organ of a patient, the distal-end assembly including (i) one or more functional electrodes configured to be placed in contact with wall tissue of the cavity and (ii) a reference electrode configured to be placed in the cavity but not in contact with the wall tissue. The processor is configured to (i) estimate one or more impedances between one or more of the functional electrodes and the reference electrode, and (ii) based on the impedances, determine, for at least a functional electrode from among the one or more functional electrodes, whether the functional electrode is in physical contact with the wall tissue.

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 system and method for maintaining the vitality of an organ through negative pressure ventilation and perfusion. The system includes fluidically coupled components: an organ enclosure, a diaphragm enclosure, an actuator / pump, a perfusion system, and a reservoir. The actuator can displace a precise amount of a working fluid that displaces that precise amount of a sterile support fluid. The sterile fluid travels between the diaphragm enclosure and the organ enclosure, thereby ventilating the organ within the organ chamber. The perfusion system circulates a perfusate through the organ.