# US 11,432,801 B2 · Interventional ultrasound probe

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- Number: US 11,432,801 B2
- Document ID: US11432801B2
- Status: Granted
- Kind: B2
- Application number: 16/603,028
- Filed: 2018-04-06
- Published: 2020-03-05
- Granted: 2022-09-06
- Earliest claimed: 2017-04-06
- Assignees: Duke University
- Applicants: Duke University
- Inventors: Charles Y. Kim
- Web page: https://patentgrep.com/patent/US11432801B2

## CPC

- A61B 8/4494: {characterised by the arrangement of the transducer elements}
- A61B 8/0841: {for locating instruments}
- A61B 17/3403: {Needle locating or guiding means}
- A61B 2017/3413: {guided by ultrasound}
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)

## Abstract

A method and system are provided for guiding a needle to a target location within a subject. The system comprises a probe and a needle guide. The probe includes two or more transducers that are arranged to direct sound waves toward a target location on a subject. The needle guide can be detachably coupled to the probe, and may be used to maintain the needle within viewing planes of the transducers while the needle is inserted into the subject. To facilitate guidance of the needle, a real-time image of the target region can be produced by overlaying images produced by the two or more transducers. Such a system may provide a more adaptive and reliable way to guide the insertion of a needle, allowing for more sophisticated and fool-proof viewing planes, improved versatility, and more ergonomic needle control.

## Claims

### Claim 1

A system comprising:
a probe comprising:
a first transducer configured to provide sound waves propagating along a first propagation direction; and
a second transducer configured to provide sound waves propagating along a second propagation direction, wherein the first transducer and the second transducer are arranged at an angle such that sound waves provided by the first and second transducers create an overlapping viewing plane over a target location of a subject; and
a needle guide detachably coupled to the probe, wherein the needle guide is disposed between the first transducer and the second transducer such that a needle inserted through the needle guide is configured to extend toward the target location and intersect the overlapping viewing plane.

### Claim 2 (depends on 1)

The system of claim 1, wherein at least one of the first transducer or the second transducer comprise a linear array transducer.

### Claim 3 (depends on 1)

The system of claim 1, wherein the first transducer and the second transducer are surrounded by a housing of the probe.

### Claim 4 (depends on 3)

The system of claim 3, wherein the first transducer and the second transducer are arranged in a concave shape within the housing.

### Claim 5 (depends on 3)

The system of claim 3, wherein the first transducer and the second transducer are permanently affixed to the housing.

### Claim 6 (depends on 1)

The system of claim 1, wherein the probe further comprises a third transducer, wherein the third transducer is arranged such that sound waves provided by the third transducer are emitted toward the target location.

### Claim 7 (depends on 6)

The system of claim 6, wherein the first transducer comprises a first transducer pair, wherein the second transducer comprises a second transducer pair, wherein the third transducer comprises a third transducer pair, and wherein the first transducer pair, the second transducer pair, and the third transducer pair are arranged in parallel such that each respective transducer pair is a fixed distance away from an adjacent transducer pair.

### Claim 8 (depends on 6)

The system of claim 6, wherein the first transducer, the second transducer, and the third transducer are coupled according to an arrangement, wherein the arrangement comprises a concave shape.

### Claim 9 (depends on 6)

The system of claim 6, wherein the first transducer, the second transducer, and the third transducer are arranged about a central axis, and wherein the needle guide is configured such that a needle inserted into the needle guide extends along the central axis toward the target location.

### Claim 10 (depends on 1)

The system of claim 1, further comprising a controller communicatively coupled to the first transducer and the second transducer.

### Claim 11 (depends on 10)

The system of claim 10, wherein the controller communicates with the first and second transducers via a wireless communication protocol.

### Claim 12 (depends on 10)

The system of claim 10, wherein the controller is configured to adjust a frequency of sound waves emitted by at least one of: the first transducer or the second transducer.

### Claim 13 (depends on 1)

The system of claim 1, wherein the needle guide comprises a coupler configured to secure the needle guide to the probe, wherein the coupler comprises at least one of: a shaft coupling, a magnetic coupling, a clip coupling, or a mating coupling.

### Claim 14 (depends on 1)

The system of claim 1, wherein the sound waves comprise one or more frequencies within a frequency range of about 1 MHz to 22 MHz.