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1. (WO2018042462) DEVICE FOR MEASURING RESPIRATORY PARAMETERS OF A PATIENT
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Claims:

1. A device (100) for measuring respiratory parameters, the device (100) comprising:

a flow tube (101); and

a body (102) to be hand-held;

wherein the flow tube (101) is a hollow tube comprising:

a first end (103, 303, 403, 503, 603, 803);

a second end (104, 304, 404, 504, 604, 804);and

atleast one tube portion (105, 305, 405, 505, 605) wherein the tube portion (105, 305, 405, 505, 605) is having a geometric construction capable of changing the rate and/or direction of airflow passing through the flow tube (101) thereby creating a differential pressure between the first end (103, 303, 403, 503, 603, 803) and the second end (104, 304, 404, 504, 604, 804);

wherein the device (100) further comprises at least one sensor to detect the differential pressure thus created.

2. The device (100) as claimed in claim 1 wherein a ratio of an area (Al) of the first end (103, 303, 403, 503, 603, 803) to an area (A2) of the second end (104, 304, 404, 504, 604, 804) in a range of 2.2-4.2.

3. The device (100) as claimed in claim 1 wherein a ratio of an area (Al) of the first end (103, 303, 403, 503, 603) to an area (A2) of the second end (104, 304, 404, 504, 604) is in a range of 2.2-3.0.

4. The device (100) as claimed in claim 2 wherein a ratio of an area (Al) of the first end (103, 303, 403, 503, 603, 803) to an area (A2) of the second end (104, 304, 404, 504,

604, 804) includes a minimum value of 2.6.

5. The device (100) as claimed in claim 1 wherein the first end (403, 503) and the second end (404, 504) are in planes substantially parallel to each other.

6. The device (100) as claimed in claim 1 wherein the first end (603) and the second end (604) are in planes at an angle other than 90 degrees, with respect to each other.

7. The device (100) as claimed in claim 1 wherein the first end (103, 303, 803) and the second end (104, 304, 804) are in planes perpendicular to each other.

8. The device (100) as claimed in claim 7 wherein the tube portion (105, 305) is an L- shaped portion.

9. The device (100) as claimed in claim 1, wherein the first end (103, 303, 403, 503, and 603, 803) and the second end (104, 304, 404, 504, and 604, 804) have a similar shape or different shapes.

10. The device (100) as claimed in claim 9, wherein the shape of the first end (103, 303, 403, 503, 603, 803) and the second end (104, 304, 404, 504, 604, 804) include one of: circular shape;

rectangular shape;

elliptical shape.

11. The device (100) as claimed in claim 1 wherein the tube portion (105, 305, 405, 505, 605) is continuous or abrupt.

12. The device (100) as claimed in claim 1 wherein the at least one sensor is located in the flow tube (101).

13. The device (100) as claimed in claim 12 wherein the flow tube (101) comprises a first sensor located at a first position (106) proximate to the first end (103, 303, 403, 503, 603) and at least a second sensor located at a second position (107) proximate to the second end (104, 304, 404, 504, 604).

14. The device (100) as claimed in claim 12 or 13 wherein the body (102) includes a receiving unit (206) to receive inputs from the sensor(s) located in the flow tube (101).

15. The device (100) as claimed in claim 1 wherein the at least one sensor is located in the body (102).

16. The device (100) as claimed in claim 15 wherein the flow tube (101) comprises a first conduit located at a first position (106, 306, 406, 506, 606) proximate to the first end (103, 303, 403, 503, 603, 803) and a second conduit located at a second position (107, 307, 407, 507, 607) proximate to the second end (104, 304, 404, 504, 604, 804), wherein the first conduit and the second conduit transfer a portion of air exhaled/inhaled by the patient to the at least one sensor located in the body (102).

17. The device (100) as claimed in claim 1 wherein the flow tube (101) is detachably connected to the body (102).

18. The device (100) as claimed in claim 1, wherein the body (102) comprising:

- a processing unit (201) to process the differential pressure thus detected;

a memory unit (202) to store one or more values of the differential pressure being detected on the device (100); and

a user interface (204) configured to communicate with a user of the device (100).

19. The device (100) as claimed in claim 17, further comprising a communication chip (205) to communicate with an external device.