JPWO2020030662A5

JPWO2020030662A5 -

Info

Publication number: JPWO2020030662A5
Application number: JP2021506265A
Authority: JP
Publication date: 2022-08-15

Claims

an elongated shaft having a longitudinal axis;
an ultrasonic transducer;
an adhesive layer;
a protective tube formed from a heat-shrinkable material, the interventional device comprising:
the ultrasonic transducer is disposed on the elongated shaft such that the ultrasonic transducer has an axial extent along the longitudinal axis;
The protective tube surrounds the ultrasonic transducer along at least the axial extent of the ultrasonic transducer, and the adhesive layer is disposed between the ultrasonic transducer and the protective tube, whereby the an adhesive layer adheres to the inner surface of the protective tube;
intervention device.

2. The adhesive layer of claim 1, wherein the adhesive layer has an axial extent that is within the axial extent of the protective tube and forms only a small portion of the axial extent of the protective tube. intervention device.

The interventional device of claim 1, wherein the adhesive layer comprises a pressure sensitive adhesive layer.

2. The interventional device of claim 1, wherein the adhesive layer extends axially beyond the axial extent of the ultrasound transducer.

2. The interventional device of claim 1, wherein the ultrasound transducer is disposed on the interventional device in the form of a band wrapped around the longitudinal axis of the elongate shaft.

further comprising an electrical shielding layer;
the electrical shielding layer is disposed between the ultrasonic transducer and the protective tube;
The interventional device of claim 1.

The interventional device of claim 1, wherein the ultrasonic transducer comprises a capacitive micromechanical ultrasonic transducer or a piezoelectric material.

wherein said ultrasonic transducer is from the group of polyvinylidene fluoride (PVDF), PVDF copolymers such as polyvinylidene fluoride trifluoroethylene (P(VDF-TrFE)) layers, or PVDF terpolymers comprising P(VDF-TrFE-CTFE) 2. The interventional device of claim 1, comprising a selected piezoelectric polymer layer.

2. The interventional device of claim 1, wherein the elongated shaft is provided by a needle, catheter, guidewire, biopsy device, pacemaker lead, intravenous line, or surgical instrument.

said elongated shaft being provided by a needle having a proximal end, a distal end and a beveled end;
the bevel is disposed at the distal end of the needle;
the ultrasonic transducer is disposed closer to the distal end than to the proximal end;
The interventional device of claim 1.

wherein the ultrasonic transducer and the adhesive layer are provided by a transducer strip;
The transducer strip is
the ultrasonic transducer;
the adhesive layer;
a first edge and an opposite second edge, wherein the first edge and the second edge are separated by a width dimension; each edge of the transducer strip comprises a first edge and an opposite second edge extending along the length of the transducer strip;
the ultrasonic transducer is disposed on the transducer strip and extends along a transducer direction that forms an acute angle with the length of the transducer strip;
the adhesive layer covers the ultrasonic transducer;
the transducer strip is wrapped in a helical fashion around the elongated shaft of the interventional device such that the ultrasound transducer forms a band around the elongated shaft;
The interventional device of claim 1.

The transducer strip further comprises a first electrical conductor and a second electrical conductor, the first electrical conductor and the second electrical conductor extending along the length of the transducer strip; the acoustic transducer further comprises a first electrode and a second electrode;
The first electrical conductor is in electrical contact with the first electrode and the second electrical conductor is in electrical contact with the second electrode, whereby the transducer strip is in electrical contact with the When wrapped in a helical configuration about the elongate shaft of an interventional device, the first electrical conductor and the second electrical conductor are axially spaced along the elongate shaft relative to the ultrasound transducer. 12. The interventional device of claim 11, each extending along the elongated shaft for making electrical contact with the ultrasound transducer at a position.

an interventional device according to claim 1;
a beamforming ultrasound imaging probe that generates an ultrasound field;
an image reconstruction unit for providing a reconstructed ultrasound image corresponding to the ultrasound field of the beamforming ultrasound imaging probe;
a position determining unit for calculating the position of the ultrasound transducer of the interventional device relative to the ultrasound field based on ultrasound signals transmitted between the beamforming ultrasound imaging probe and the ultrasound transducer; and a position determination unit that provides an icon in the reconstructed ultrasound image based on the calculated position of the ultrasound transducer.

A method of manufacturing an interventional device according to claim 1, the method comprising:
providing an ultrasonic transducer transfer stack, the ultrasonic transducer transfer stack comprising:
a substrate;
a first foil strip with a layer of pressure sensitive adhesive on each surface;
an ultrasonic transducer;
an adhesive layer;
a second foil strip with a layer of pressure sensitive adhesive on each surface;
an electrical shielding layer;
The electrical shielding layer, the first foil strip, the ultrasonic transducer and the second foil strip are arranged in layers on the substrate such that at a first location the electrical shielding layer is disposed between said substrate and said second foil strip, said first foil strip having one of the pressure sensitive adhesive layers of said first foil strip facing outwardly with respect to said substrate. and in a second position the adhesive layer is disposed between the substrate and the electrical shield layer, the second foil strip is positioned over the electrical shield layer, the ultrasonic transducer is positioned over the second foil strip, and the first foil strip is attached to the pressure sensitive adhesive layer of the first foil strip. positioned over the ultrasonic transducer with one of the facing outwards relative to the substrate;
rolling the elongated shaft of the interventional device across the outwardly facing pressure sensitive adhesive layer of the first foil strip, thereby removing the outwardly facing pressure sensitive adhesive layer of the first foil strip; a layer adheres to the elongated shaft, and the first foil strip and the ultrasonic transducer and the adhesive layer and the second foil strip and the electrical shield layer adhere to the elongated shaft; and the elongated shaft facing outward and attached to the elongated shaft;
placing a protective tube comprising a heat-shrinkable material over a portion of the elongated shaft to cover at least the ultrasonic transducer;
applying heat to the protective tube such that the protective tube contracts radially with respect to the longitudinal axis of the elongated shaft and the adhesive layer adheres to the inner surface of the protective tube. and applying heat.

15. The method of claim 14, wherein the adhesive layer has an axial extent that is within the axial extent of the protective tube and forms only a small portion of the axial extent of the protective tube. Method.

15. The method of Claim 14, wherein the adhesive layer comprises a pressure sensitive adhesive layer.

said ultrasonic transducer transport stack having at both said first location and said second location a first electrical conductor disposed between said first foil strip and said second foil strip; 15. The method of claim 14, further comprising a second electrical conductor, wherein said first electrical conductor and said second electrical conductor are in electrical contact with said ultrasound transducer.