# US 11,419,523 B2 · Blood vessel sizing device and method for sizing blood vessel

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- Number: US 11,419,523 B2
- Document ID: US11419523B2
- Status: Granted
- Kind: B2
- Application number: 16/412,758
- Filed: 2019-05-15
- Published: 2019-08-29
- Granted: 2022-08-23
- Earliest claimed: 2012-03-22
- Assignees: Sizer LLC
- Applicants: Sizer LLC
- Inventors: Richard B. Park
- Web page: https://patentgrep.com/patent/US11419523B2

## CPC

- A61B 5/1075: {for measuring dimensions by non-invasive methods, e.g. for determining thickness of tissue layer (A61B8/0858 takes precedence)}
- A61B 5/02007: {Evaluating blood vessel condition, e.g. elasticity, compliance}
- A61B 5/1079: {using optical or photographic means}
- A61B 6/504: {for diagnosis of blood vessels, e.g. by angiography}
- A61B 6/5217: {extracting a diagnostic or physiological parameter from medical diagnostic data}
- A61B 90/39: {Markers, e.g. radio-opaque or breast lesions markers}
- A61B 2017/00907: {for light}
- A61B 2090/3966: {Radiopaque markers visible in an X-ray image}
- A61B 2090/3991: {having specific anchoring means to fixate the marker to the tissue, e.g. hooks}
- A61B 2560/0412: Low-profile patch shaped housings
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)

## Abstract

Medical devices and methods for determining the size of blood vessels are disclosed. In one implementation, a blood vessel sizing device is configured for placement on an area of skin of a patient. The device includes a plurality of radiopaque concentric-circle elements. In one implementation, a blood vessel sizing method includes placing a marker having a plurality of concentric-circle elements on the skin of a patient, imaging a blood vessel of the patient and the device, and comparing the imaged blood vessel to the imaged circles to determine the blood vessel size, the concentric-circle elements allowing a determination of size without errors of parallax.

## Claims

### Claim 1

A method comprising:
receiving data corresponding to a biological feature present in radiological image data;
determining a dimensional property of the feature;
identifying one or more elements from the image data corresponding to a plurality of radiopaque, concentric-circles of a sizing device positioned on an area of skin of a patient;
identifying a dimensional property for each of the identified one or more elements;
determining a longest axis of the identified one or more elements;
comparing the determined dimensional property of the feature to the identified one or more elements, along the determined longest axis; and
converting the determined dimensional property of the feature into a true dimension value for communication to a user.

### Claim 2 (depends on 1)

The method of claim 1, further comprising:
identifying one or more radiopaque symbols corresponding to the one or more dimensional properties of the identified one or more elements.

### Claim 3 (depends on 1)

The method of claim 1, further comprising:
after receiving data corresponding to the biological feature present in the radiological image data, removing a non-adhesive tab structure projecting from a side of a base structure of the sizing device, for facilitating facile removal of the sizing device from the area of skin of the patient.

### Claim 4 (depends on 1)

The method of claim 1, further comprising:
uniquely identifying the sizing device by using a radiopaque unique identifier on the sizing device.

### Claim 5 (depends on 4)

The method of claim 4, wherein uniquely identifying the sizing device comprises reading a machine-readable barcode.

### Claim 6 (depends on 1)

The method of claim 1, further comprising:
locating the sizing device in a radiographic image by utilizing a radiopaque location marker having a surface area of between 18 and 22 square millimeters.

### Claim 7 (depends on 1)

The method of claim 1, wherein the sizing device comprises a polymeric material.

### Claim 8 (depends on 1)

The method of claim 1, wherein the sizing device comprises a base structure that is substantially transparent to light with a wavelength in the visible spectrum.

### Claim 9 (depends on 1)

The method of claim 1, wherein the receiving data corresponding to the biological feature comprises receiving radiological image data of a blood vessel.

### Claim 10 (depends on 9)

The method of claim 9, wherein the identifying the dimensional property for each of the identified one or more elements comprises measuring imaged diameters of the plurality of radiopaque concentric-circles.

### Claim 11

A sizing device, comprising:
a planar base structure having a front surface and a back surface, wherein the base structure is:
configured to be placed on a user's skin to capture a target area of a patient having a passageway; and
substantially transparent to light with a wavelength in the visible spectrum;
a plurality of radiopaque concentric-circle elements positioned on the front surface of the base structure; and
a plurality of radiopaque symbols positioned on the base structure, wherein each symbol of the plurality of symbols represents a dimensional property of at least one of the concentric-circle radiopaque elements, wherein the concentric-circle radiopaque elements are configured to be detected by radiological imaging equipment to enable a determination of a size of the passageway without errors of parallax.

### Claim 12 (depends on 11)

The sizing device of claim 11, further comprising:
a deformable structure having a front surface and a back surface, the front surface of the deformable structure adhered to the back surface of the base structure.

### Claim 13 (depends on 12)

The sizing device of claim 12, further comprising:
a window, formed by an adhesion of the front surface of the deformable structure to a perimeter area of the back surface of the base structure.

### Claim 14 (depends on 12)

The sizing device of claim 12, wherein the front surface of the deformable structure completely covers the back surface of the base structure.

### Claim 15 (depends on 12)

The sizing device of claim 12, wherein the deformable structure comprises a sponge-like material.

### Claim 16 (depends on 11)

The sizing device of claim 11, wherein the base structure comprises a polymeric material.

### Claim 17 (depends on 11)

The sizing device of claim 11, further comprising:
a non-adhesive tab structure projecting from a side of the base structure, for facilitating facile removal of the sizing device from an area of skin of the patient.

### Claim 18 (depends on 11)

The sizing device of claim 11, wherein the sizing device is uniquely identified by a radiopaque unique identifier on the base structure.

### Claim 19 (depends on 18)

The sizing device of claim 18, wherein the radiopaque unique identifier comprises a machine-readable barcode.

### Claim 20 (depends on 11)

The sizing device of claim 11, further comprising:
a radiopaque location marker on the front surface of the base structure that is distinct from the radiopaque concentric-circle elements and the symbols configured to aid in locating the sizing device in a captured radiological image.