摘要:
A catheter enables real-time light measurements, for example, without limitation, diffuse reflectance, fluorescence, etc., from biological materials, such as tissue (including blood), while performing RF ablation. The catheter tip design isolates illumination and collection paths such that light exits the catheter tip and travels through the tissue of interest (e.g., cardiac tissue or blood) before returning to the catheter tip. Such a design advantageously avoids saturation of the optical detector, and ensures diffusion of the illumination light within the medium of interest. The catheter has a catheter body and a tip electrode. The tip electrode has an exterior shell, an inner layer of diffuse material and a hollow cavity, wherein the inner layer is configured to transmit light outside the tip electrode to a tissue via a set of illumination openings in the shell wall and the hollow cavity is configured to receive light from the tissue via a set of collection openings in the shell wall and the inner layer. An inner surface of the inner layer has a reflective coating to isolate light injected into the inner layer from light collected in the hollow cavity. There are a first optical waveguide extending between the catheter body and the tip electrode to inject light into the inner layer and illuminate the tissue, and a second optical waveguide extending between the catheter body and the tip electrode to collect the recaptured light in the hollow cavity.
摘要:
PROBLEM TO BE SOLVED: To provide an endoscopic surgical instrument improving the cleaning characteristics of the endoscopic surgical instrument in the case of a TFT configuration design.SOLUTION: An endoscopic surgical instrument 1 including an outside jacket 2 of hose shape includes an inside jacket 4 of the same hose shape supported in a relatively displaceable manner in the outside jacket 2, and an instrument head 6 of sleeve or shaft shape formed at or mounted to an end section of the inside jacket 4. An RF electrode 8 of needle shape which is electrically insulated and freely projected in an axial direction over the end part of the instrument head 6 and to which the electric supply line is transmitted through the inside jacket 4, is fixed to the instrument head 6. The instrument head 6 is formed with a cleaning passage extended at least in the axial direction and opened at the end of the instrument head 6 on both sides.
摘要:
PROBLEM TO BE SOLVED: To provide a needle for a living body used for sampling its tissues while minimizing damage to the samples, and a method for sampling tissue with this needle.SOLUTION: The ceramic-made needle for a living body for sampling its tissues has a penetration hole to suck samples from the living body and a penetration hole to introduce a cooling gas in its longitudinal direction. The needle, on the side of its puncture end, has a cutter for cutting tissue samples between the penetration hole opening to suck samples and another penetration hole opening to introduce the cooling gas. By piercing this needle into the living body and sucking its samples through the sample suction penetration hole, while introducing the cooling gas from the cooling gas introduction penetration hole, half-frozen or frozen tissues are cut off by the cutter, and tissue samples are sucked and collected.
摘要:
PROBLEM TO BE SOLVED: To provide a surgical vaporization electrode including an electrode head which is configured to preclude destruction by plasma. SOLUTION: This surgical vaporization electrode 1 including an electrode head (2) which has a functional surface (6) and which is connected at least at one connection site (10) to a feed conductor (3) enclosed by an insulating sheath (4), is characterized in that the surface zone (7) of the electrode head (2) surrounding the connection site (10) has a ceramic covering (8). COPYRIGHT: (C)2009,JPO&INPIT