公开(公告)号：US11464584B2

公开(公告)日：2022-10-11

申请号：US16970974

申请日：2019-02-03

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Willem-Jan Arend De Wijs ,  Cornelis Gerardus Visser ,  Hendrik Roelof Stapert ,  Johannes Wilhelmus Weekamp ,  Gerardus Franciscus Cornelis Maria Lijten ,  Eric Franciscus Johannes Claessens

IPC: A61B34/20 ,  A61B8/08 ,  A61M25/01 ,  H01L41/047 ,  H01L41/113 ,  A61B90/00 ,  A61B8/00

Abstract: An interventional device includes an elongate shaft and a transducer strip. The transducer strip includes a first edge and an opposing second edge. The first edge and the second edge are separated by a width dimension, and the first edge and the second edge each extend along a length direction of the transducer strip. The transducer strip also includes a piezoelectric transducer that extends along a transducer direction that forms an acute angle with respect to the length direction. The transducer strip is wrapped in the form of a spiral around the elongate shaft of the interventional device such that the piezoelectric transducer forms a band around the elongate shaft. The width dimension is defined such that the adjacent first and second edges of consecutive turns of the spiral abut or overlap one another.

公开(公告)号：US11751952B2

公开(公告)日：2023-09-12

申请号：US17265635

申请日：2019-07-29

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Eric Franciscus Johannes Claessens ,  Jan Harm De Boer ,  Patrick Wilhelmus Van Kaam ,  Ioannis Pappous

IPC: A61B34/20 ,  A61B8/08 ,  A61B8/00

CPC classification number: A61B34/20 ,  A61B8/0841 ,  A61B8/4245 ,  A61B8/463 ,  A61B8/5207 ,  A61B2034/2063

Abstract: A medical sensing system (100) includes an elongate interventional device (101) and an adjustable capacitance circuit (102). The elongate interventional device (101) includes a sensor (103) having a capacitance (Css). The elongate interventional device (101) also includes a first electrical conductor (104) and a second electrical conductor (105). The first electrical conductor (104) and the second electrical conductor (105) are in electrical contact with the sensor (103) and extend along the elongate interventional device (101). The elongate interventional device (101) also includes i) an electrically conductive shield (106) that overlaps the electrical conductors (104, 105) and/or ii) an electrically conductive shaft (107). The adjustable capacitance circuit (102) provides an adjustable capacitance (CAdj1, CAdj2) between at least one of the electrical conductors (104, 105) and i) the electrically conductive shield (106) that overlaps the electrical conductors (104, 105) and/or ii) the electrically conductive shaft (107).