# US 2021/0267673 A1 · Catheter ultrasound transducer container

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- Number: US 2021/0267673 A1
- Document ID: US20210267673A1
- Status: Published application
- Kind: A1
- Application number: 17/260,458
- Filed: 2019-08-22
- Published: 2021-09-02
- Earliest claimed: 2018-08-22
- Assignees: Healium Medical Ltd
- Applicants: Healium Medical Ltd.
- Inventors: Ran Sela; Yuri Megel; Shimon Eckhouse
- Web page: https://patentgrep.com/patent/US20210267673A1

## CPC

- A61B 18/1492: {having a flexible, catheter-like structure, e.g. for heart ablation (A61B18/1477 takes precedence)}
- A61B 8/12: in body cavities or body tracts, e.g. by using catheters
- A61B 8/445: {Details of catheter construction}
- A61B 8/4477: {using several separate ultrasound transducers or probes}
- A61B 8/4494: {characterised by the arrangement of the transducer elements}
- A61N 7/022: {intracavitary}
- A61B 2017/00526: {Methods of manufacturing}
- A61B 2018/00011: {with fluids}
- A61B 2018/00023: {closed, i.e. without wound contact by the fluid}
- A61B 2018/00029: {open}
- A61B 2018/00166: {Multiple lumina}
- A61B 2018/00267: {having a basket shaped structure}
- A61B 2018/00273: {Anchoring means for temporary attachment of a device to tissue}
- A61B 2018/00279: {deployable}
- A61B 2018/00285: {Balloons}
- A61B 2018/00351: {Heart}
- A61B 2018/00375: {Ostium, e.g. ostium of pulmonary vein or artery}
- A61B 2018/00577: {Ablation}
- A61B 2018/00702: {Power or energy}
- A61B 2018/00791: {Temperature}
- A61B 2018/00839: {Bioelectrical parameters, e.g. ECG, EEG}
- A61B 2018/00982: {combined with or comprising means for visual or photographic inspections inside the body, e.g. endoscopes}
- A61B 2018/00994: {combining two or more different kinds of non-mechanical energy or combining one or more non-mechanical energies with ultrasound}
- A61B 2090/061: {for measuring dimensions, e.g. length}
- A61N 2007/0052: {using the same transducer for therapy and imaging}
- A61N 2007/006: {Lenses}
- A61N 2007/0078: {with multiple treatment transducers}
- A61N 2007/0082: {Scanning transducers}
- A61N 2007/0091: {with moving parts, e.g. transducers, lenses, reflectors}
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)
- A61N: ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY (measurement of bioelectric currents A61B; surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body A61B18/00; anaesthetic apparatus in general A61M; incandescent lamps H01K; infrared radiators for heating H05B)

## Abstract

A catheter US transducer container and method of manufacture thereof including a housing, one or more cooling channels oriented longitudinally along a longitudinal axis of the container, a sealing cooling channel cover, one or more PE elements positioned on a floor of the cooling channel, the cooling channel having a trapezoid cross section at any point along the PE element.

## Claims

### Claim 1

A catheter ultrasound (US) transducer container, the catheter US transducer comprising:
a housing;
at least one cooling channel, oriented longitudinally along a longitudinal axis of the housing;
a sealing cooling channel cover;
one or more piezoelectric (PE) elements positioned on a floor of said cooling channel and having an emitting surface facing said cover; and
wherein said cooling channel has a trapezoid cross section at any point along said PE element.

### Claim 2 (depends on 1)

The catheter US transducer container according to claim 1, wherein an emitting surface of at least one PE element is oriented in parallel to said cooling channel cover.

### Claim 3 (depends on 1)

The catheter US transducer container according to claim 1, wherein said floor comprises the short base of the trapezoid.

### Claim 4 (depends on 1)

The catheter US transducer container according to claim 1, wherein said housing further comprises at least one fluid inlet opening to a proximal end of the cooling channel and at least one fluid outlet located at a distal end of said cooling channel.

### Claim 5 (depends on 1)

The catheter US transducer container according to claim 1, wherein said container further comprises a fluid diverting chamber coupled to a distal end of said cooling channel.

### Claim 6 (depends on 1)

The catheter US transducer container according to claim 1, wherein said housing comprises at least one post coupled to said floor of said cooling channel and supports said PE element, forming a gap between said floor and said PE element.

### Claim 7 (depends on 1)

The catheter US transducer container according to claim 1, wherein said at least one PE element is angled with respect to said floor of said cooling channel.

### Claim 8 (depends on 1)

The catheter US transducer container according to claim 1, wherein said cooling channel cover and said emitting surface of said PE element are parallel.

### Claim 9 (depends on 1)

The catheter US transducer container according to claim 1, wherein said cooling channel comprises a trough-form disposed longitudinally along a longitudinal axis of said container and configured to promote laminar fluid flow through said cooling channel.

### Claim 10 (depends on 9)

The catheter US transducer container according to claim 9, wherein said trough-form is configured to promote a temperature gradient in said fluid flowing along a distance (L) between said emitting surface of said PE element and said fluid channel cover.

### Claim 11 (depends on 10)

The catheter US transducer container according to claim 10, wherein said trough-form is configured to promote a temperature gradient in said fluid flowing along a distance (L) between said emitting surface of said PE element and said fluid channel cover and maintain a temperature at said cooling fluid channel cover at or below temperature of blood surrounding said container.

### Claim 12 (depends on 1)

The catheter US transducer container according to claim 1, wherein said container comprises a plurality of PE elements angled with respect to one another.

### Claim 13 (depends on 1)

The catheter US transducer container according to claim 1, wherein said container comprises a plurality of PE elements at least one of which is angled with respect to said cooling channel floor.

### Claim 14 (depends on 1)

The catheter US transducer container according to claim 1, wherein at least one of said PE elements is an ablative PE element and at least one of said PE elements is an imaging PE element.

### Claim 15 (depends on 1)

The catheter US transducer container according to claim 1, wherein a first of said at least one PE elements is both an ablative and an imaging PE element.

### Claim 16 (depends on 1)

The catheter US transducer container according to claim 1, wherein a first of said at least one PE elements is both an ablative and an imaging PE element and a second PE element of said at least one PE elements is only an imaging PE element.

### Claim 17 (depends on 1)

The catheter US transducer container according to claim 1, wherein a first PE elements of said at least one PE elements operates at a low frequency and a second of said at least one PE elements operates at a high frequency.

### Claim 18 (depends on 1)

The catheter US transducer container according to claim 1, wherein a depth (d) of the cross-section of said cooling channel is smaller than the radius of said housing.

### Claim 19 (depends on 1)

The catheter US transducer container according to claim 1, wherein said catheter comprises at least one positioner, and wherein the at least one positioner is in a form selected from the group consisting of: a basket, a coil, and an umbrella.

### Claim at position 20

20-28. (canceled)

### Claim 29 (depends on 1)

The catheter US transducer container according to claim 1, wherein said PE element is in communication with a processor, said processor being configured to adjust the level of energy emitted from said. PE element based on at least one parameter selected from the group consisting of: distance measured from the emitting surface of the PE element to said tissue wall, tissue thickness, duration of energy delivery, change in amplitude of ultrasound signal returning from the tissue, change in phase of ultrasound signal returning from the tissue, and reduction of recorded electrical potential signals.

### Claim 30 (depends on 29)

The catheter US transducer container according to claim 29, wherein said processor is configured to adjust fluid flow velocity in said cooling channel based on said beam energy level.

### Claim at position 23

31-40. (canceled)