Cardiac function measurement device, cardiac function measurement method, and cardiac function measuring program

Patent metadata

Field	Value
Publication number	US-11229366-B2
Application number	US-201816134396-A
Country	US
Kind code	B2
Filing date	Sep 18, 2018
Priority date	Mar 18, 2016
Publication date	Jan 25, 2022
Grant date	Jan 25, 2022

Abstract

A cardiac function measuring apparatus, a cardiac function measuring method, and a cardiac function measuring program capable of monitoring cardiac functions are disclosed. The cardiac function measuring apparatus for measuring data for evaluating cardiac functions includes an irradiation unit for irradiating a jugular with light, an imaging unit configured to acquire image data of the jugular, and a vein discriminating part configured to discriminate a shape of the jugular vein in the acquired image data and to calculate a shape complexity level indicating complexity in the shape of the jugular.

First claim

What is claimed is:

1. A cardiac function measuring apparatus configured to measure data for evaluating cardiac functions of a user, comprising:
an irradiator configured to irradiate a jugular with light;
an imager configured to acquire image data of the jugular;
a vein discriminator configured to:
discriminate a shape of a jugular vein in the acquired image data; and
calculate a shape complexity level of the jugular vein, the shape complexity level indicating complexity in the shape of the jugular vein; and

an alarm determining unit configured to:
compare the shape complexity level of the jugular vein to a threshold value of complexity levels of the jugular vein; and
evaluate the shape of the jugular vein for a change in a cardiac status of the user based on the comparison of the shape complexity level of the jugular vein to the threshold value of complexity levels of the jugular vein.

2. The cardiac function measuring apparatus according to claim 1 , further comprising:
a memory configured to store a plurality of shape complexity levels of the jugular vein of the user; and
wherein the cardiac function measuring apparatus is configured to compare the plurality of shape complexity levels acquired at different times.

3. The cardiac function measuring apparatus according to claim 1 , wherein the vein discriminator is configured to calculate a line in conformance with the shape of the discriminated jugular vein, calculate a regression curve of the line, and determine the shape complexity level as a number of inflection points of the regression curve.

4. The cardiac function measuring apparatus according to claim 1 , further comprising:
a display configured to display a result when a presence of an abnormality in the cardiac functions of the user is determined.

5. The cardiac function measuring apparatus according to claim 1 , further comprising:
an input device configured to input parameters of the cardiac function measuring apparatus, the parameters of the cardiac function measuring apparatus including one or more of the threshold value of complexity levels of the jugular vein, starting and ending measurements, and a selection of a result to be displayed on the display, the result including one or more of a measurement result, a calculated result, a graph, and a table.

6. The cardiac function measuring apparatus according to claim 1 , further comprising:
a brightness detector configured to detect brightness of an imaging environment; and
a brightness adjustor configured to adjust the irradiation irradiator to bring the detected brightness from the brightness detector to a target value.

7. The cardiac function measuring apparatus according to claim 1 , wherein the alarm determining unit is configured to:
determine a presence of an abnormality in the cardiac functions of the user when the shape complexity level exceeds the threshold value, and determine that the cardiac functions of the user are normal when the shape complexity level does not exceed the threshold value.

8. The cardiac function measuring apparatus according to claim 1 , further comprising:
a housing configured to house the irradiator, the imager, the vein discriminator, a brightness detector, a memory, a controller, an input device, and a display, and wherein the housing includes an operating surface and a measuring surface, the display and the input device being disposed on the operating surface, and the imager, the brightness detector, and the irradiator being disposed on the measuring surface;
the measuring surface of the housing including a recessed portion, the imager, the brightness detector, and the irradiator being disposed in the recessed portion;
an edge portion surrounding the recessed portion having a supporting portion configured to come into contact with the jugular during measurement and configured to support the housing on the jugular; and
wherein the recessed portion includes a bottom surface and a side surface surrounding the bottom surface, and a space being provided between the operating surface and the bottom surface of the housing, and wherein the memory and the controller are housed in the space.

9. The cardiac function measuring apparatus according to claim 8 , wherein the irradiator comprises two irradiators, the two irradiators being disposed on the side surface of the housing, and wherein the two irradiator are on opposite sides of the imager.

10. The cardiac function measuring apparatus according to claim 1 , wherein the threshold value of complexity levels of the jugular vein is an average value of complexity levels of the jugular vein of the user being evaluated for the change in the cardiac status multiplied by a coefficient.

Assignees

• Terumo Corp
• Terumo Kabishiki Kaisha

Inventors

• Maki Shin
• Utsugida Tomoki

Classifications

• A61B5/0059

  using light, e.g. diagnosis by transillumination, diascopy, fluorescence (photoacoustic A61B5/0093; optical measurement of heart rate A61B5/02416; optical measurement of blood flow A61B5/0261; optical measurement of analytes A61B5/1455) · CPC title

• G06T7/60

  Analysis of geometric attributes · CPC title

• A61B5/742

  using visual displays (displays for heart-related electrical signals, e.g. ECG, A61B5/339) · CPC title

• A61B5/746

  Alarms related to a physiological condition, e.g. details of setting alarm thresholds or avoiding false alarms · CPC title

• A61B5/1079

  using optical or photographic means · CPC title