Diagnostic tool and method of use
A diagnostic tool and methods of using the tool are provided to quantify an amount of nasal collapse in a patient. The diagnostic tool includes a mask with an endoscope port and an opening to allow air flow, an endoscope with a camera adapted to take an image of the nasal valve, and an air flow sensor adapted to measure an inhalation rate of the patient. The diagnostic tool can quantify a size difference between the nasal valve during inhalation and zero flow by calculating a percentage difference in an area or one or more dimensions of the nasal valve during inhalation and zero flow.
1. A data acquisition module for a system for measuring a nasal valve collapse of a patient, wherein the data acquisition module comprises a processor that is configured to:
receive a plurality of images of a nasal valve from a camera of an endoscope positioned through an endoscope port of a facial mask and a plurality of air flow measurements from an air flow sensor configured to measure an air flow across an opening in the facial mask;
determine (i) a first image of the plurality of images of the nasal valve taken during inhalation and (ii) a second image of the plurality of images of the nasal valve taken during a period between exhalation and inhalation, wherein the second image is synchronized with a zero flow measurement of the plurality of air flow measurements, wherein the first image is synchronized with a non-zero flow measurement of the plurality of air flow measurements; and
determine, based on the first image and the second image, a size difference of the nasal valve during inhalation and during the period between exhalation and inhalation.
2. The data acquisition module of claim 1 , wherein, to determine the size difference of the nasal valve, the processor is configured to:
determine, based on the first image, a first distance between a septum and a lateral wall of the nasal valve during inhalation,
determine, based on the second image, a second distance between the septum and the lateral wall of the nasal valve during the period between exhalation and inhalation, and
determine the size difference by dividing the first distance by the second distance.
3. The data acquisition module of claim 1 , wherein the plurality of images are taken during a plurality of inhalation rates,
wherein the plurality of inhalation rates are different from each other, and
wherein the data acquisition module is further configured to, for each inhalation rate, determine a relative distance between a septum and a lateral wall of the nasal valve.
4. The data acquisition module of claim 3 , wherein the processor is configured to communicate with an external computing device to cause display of a graph of (i) the relative distances between the septum and the lateral wall of the nasal valve at the plurality of inhalation rates versus (ii) the air flow measurements at the plurality of inhalation rates.
5. The data acquisition module of claim 1 , wherein the processor is further configured to:
receive an annotation of the first image of the nasal valve during inhalation, wherein the annotation of the first image indicates a distance between a septum and a lateral wall of the nasal valve in the first image;
determining a first distance between the septum and the lateral wall based on the annotation of the first image of the nasal valve during inhalation;
receive an annotation of the second image of the nasal valve during the period between exhalation and inhalation, wherein the annotation of the second image indicates a distance between the septum and the lateral wall of the nasal valve in the second image; and
determine a second distance between the septum and the lateral wall based on the annotation of the second image of the nasal valve during the period between exhalation and inhalation; and
determine the size difference of the nasal valve based on the first distance and the second distance.
6. The data acquisition module of claim 1 , wherein the processor is configured to apply image analysis to the first image to automatically measure an area of space between a septum and a lateral wall to automatically determine an area or a length of the septum and a lateral wall.
7. The data acquisition module of claim 1 , wherein the processor is configured to receive the plurality of images as video captured by the camera.
8. The data acquisition module of claim 1 , wherein the processor is further configured to synchronize the plurality of images from the camera and the plurality of air flow measurements from the air flow sensor using a plurality of time stamps associated with the plurality of images and the plurality of air flow measurements.
9. The data acquisition module of claim 1 , wherein the processor is configured to determine the size difference of the nasal valve during inhalation and during the period between exhalation and inhalation by calculating, based on the first image and the second image, a percentage difference in an area or one or more dimensions of the nasal valve between the first image and the second image.
10. The data acquisition module of claim 1 , wherein the processor is configured to cause a display device to display a graph including the plurality of air flow measurements versus time.
11. A method of measuring a nasal valve collapse by a data acquisition module comprising a processor, the method comprising:
receiving, at a processor of a data acquisition module, a plurality of images of a nasal valve from a camera of an endoscope positioned through an endoscope port of a facial mask and a plurality of air flow measurements from an air flow sensor configured to measure an air flow across an opening in the facial mask,
determining, by the processor, (i) a first image of the plurality of images of the nasal valve taken during inhalation and (ii) a second image of the plurality of images of the nasal valve taken during a period between exhalation and inhalation, wherein the second image is synchronized with a zero flow measurement of the plurality of air flow measurements, wherein the first image is synchronized by the processor with a non-zero flow measurement of the plurality of air flow measurements, and
determining, based on the first image and the second image, a size difference of the nasal valve during inhalation and during the period between exhalation and inhalation.
12. The method of claim 11 , wherein, determining the size difference of the nasal valve comprises:
determining, based on the first image, a first distance between a septum and a lateral wall of the nasal valve during inhalation,
determining, based on the second image, a second distance between the septum and the lateral wall of the nasal valve during the period between exhalation and inhalation, and
determining the size difference by dividing the first distance by the second distance.
13. The method of claim 11 , wherein the plurality of images are taken during a plurality of inhalation rates,
wherein the plurality of inhalation rates are different from each other, and
wherein the method further comprises, for each inhalation rate, determining a relative distance between a septum and a lateral wall of the nasal valve.
14. The method of claim 13 , further comprising communicating with an external computing device to cause display of a graph of (i) the relative distances between the septum and the lateral wall of the nasal valve at the plurality of inhalation rates versus (ii) the air flow measurements at the plurality of inhalation rates.
15. The method of claim 11 , further comprising:
receiving an annotation of the first image of the nasal valve during inhalation, wherein the annotation of the first image indicates a distance between a septum and a lateral wall of the nasal valve in the first image;
determining a first distance between the septum and the lateral wall based on the annotation of the first image of the nasal valve during inhalation;
receiving an annotation of the second image of the nasal valve during the period between exhalation and inhalation, wherein the annotation of the second image indicates a distance between the septum and the lateral wall of the nasal valve in the second image; and
determining a second distance between the septum and the lateral wall based on the annotation of the second image of the nasal valve during the period between exhalation and inhalation; and
determining the size difference of the nasal valve based on the first distance and the second distance.
16. The method of claim 11 , further comprising applying image analysis to the first image to automatically measure an area of space between a septum and a lateral wall to automatically determine an area or a length of the septum and a lateral wall.
17. The method of claim 11 , further comprising synchronizing the plurality of images from the camera and the plurality of air flow measurements from the air flow sensor using a plurality of time stamps associated with the plurality of images and the plurality of air flow measurements.
18. The method of claim 11 , wherein determining the size difference of the nasal valve during inhalation and during the period between exhalation and inhalation comprises calculating, based on the first image and the second image, a percentage difference in an area or one or more dimensions of the nasal valve between the first image and the second image.
19. The method of claim 11 , further comprising causing a display device to display a graphical user interface, an image of the plurality of images taken at a first time, and an airflow measurement taken at the first time.
20. The method of claim 11 , further comprising causing a display device to display a graph including the plurality of air flow measurements versus time.