WO1997019635A1 - Respiratory test apparatus - Google Patents
Respiratory test apparatus Download PDFInfo
- Publication number
- WO1997019635A1 WO1997019635A1 PCT/GB1996/002932 GB9602932W WO9719635A1 WO 1997019635 A1 WO1997019635 A1 WO 1997019635A1 GB 9602932 W GB9602932 W GB 9602932W WO 9719635 A1 WO9719635 A1 WO 9719635A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- subject
- target
- profile
- pressure
- test
- Prior art date
Links
Classifications
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B23/00—Exercising apparatus specially adapted for particular parts of the body
- A63B23/18—Exercising apparatus specially adapted for particular parts of the body for improving respiratory function
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/08—Detecting, measuring or recording devices for evaluating the respiratory organs
- A61B5/087—Measuring breath flow
Definitions
- the present invention relates to an apparatus for testing the respiratory ability of subjects.
- an apparatus which comprises a unit through which a subject can inspire, this unit including a pressure sensing device, and a data processing unit to which the pressure sensing device is connected, and arranged to compare the time- varying pressure, or a parameter thereof, with a prestored target.
- the apparatus is arranged to store a target for each individual subject.
- this target comprises a time-varying pressure profile taken from the subject during a pre-test trial inspiration, but then reduced by a predetermined fraction in pressure amplitude.
- the target may comprise an integral of the trial inspiration pressure profile, reduced by a predetermined fraction.
- the target is selected as the best result from a number, say three, trial inspirations.
- the apparatus is preferably arranged for the subject to carry our successive test inspirations, the measured results of each of these being compared against the target, with the time intervals between successive tests progressively reducing.
- the apparatus prompts the subject to commence each successive inspiration (e.g. by means of a display and/or audible signal) .
- a set of successive tests e.g. six tests
- the same interval e.g. 60 seconds
- a second set of tests are carried out with a smaller internal (e.g. 45 seconds) between them, and so on.
- the apparatus is arranged to determine if the subject has "passed” that test, in which case the apparatus prompts the subject to carry out the next test, and so on.
- the subject will fail an individual test, and this completes the exercise: the point in the overall program at which the failure occurs is recorded.
- the prestored target profile is continuously displayed on a visual display, and the measured profile is built up on the display as the subject breathes in: the subject is thus able to compare his performance with the target, and can adjust his effort in an attempt to exceed the target. This "feedback" to the subject is particularly valuable.
- the apparatus requires the measured time- varying profile to exceed the target profile by a predetermined margin, in terms of the integral of that curve (e.g. the area under the curve, which is therefore a measure of the work done) .
- the apparatus requires the duration of the measured time-varying profile to exceed a predetermined fraction (e.g. 90%) of the duration of the target profile.
- the apparatus is arranged to display one or more of the following: the peak pressure of the target profile, the average peak pressure from the successive test, the integral of the target profile, the accumulating integral of each test profile, and the accumulated integral of the successive tests (corresponding to the total work done by the subject during the test program) .
- the subject Preferably at each session of use, the subject creates a fresh target, in the manner described above, against which he compares his performance during the tests which he carried out in that session.
- the peak pressure measured typically over the first second of each inspiration, gives an indication of measured respiratory muscle strength.
- the integral of each test profile is a measure of the work done.
- the accumulated integral, over all tests completed successfully in the session, is a measure of respiratory endurance.
- FIGURE 1 is a schematic diagram of an apparatus in accordance with the invention for testing the respiratory ability of a patient
- FIGURE 2 is a typical time-varying measure of pressure sensed in a trial use of the apparatus of Figure 1;
- FIGURE 3 is a typical display of a target profile and a measured profile;
- FIGURE 4 is a typical results grid following a test session.
- FIG. 1 of the drawings there is shown an apparatus for carrying out respiratory tests, the apparatus comprising a hand-held unit 10 having a mouthpiece 11, and through which the patient or subject inspires, and a personal computer 20 to which a manometer of the unit 10 is connected.
- the computer 20 includes a visual display unit (VDU) 22 and keyboard 24 is connected to a printer 26.
- VDU visual display unit
- the computer is loaded with a respiratory test program in accordance with the invention, arranged for the apparatus to function as follows.
- the computer creates and stores a record for each subject: thus for each subject, data is entered on the computer keyboard 24 to identify the subject, and various other items of data concerning the subject are also entered.
- a target pressure profile for the subject is created and stored: thus, the VDU prompts the subject to break in through the hand-held unit 10; the negative pressure created within the air passage of the unit 10 is monitored by the manometer, and a corresponding time-varying profile P as shown in Figure 2 is displayed on the VDU and also stored. This procedure is carried out three times, with an interval of time (e.g. of two minutes) between each inspiration.
- the computer selects the "best " pressure profile of the three (as a combination of the largest peak and longest duration) : the computer then calculates a target profile T which is predetermined fraction (e.g. 80%) in amplitude of the selected "best" pressure profile; this target profile is then displayed continuously on the VDU.
- a target profile T which is predetermined fraction (e.g. 80%) in amplitude of the selected "best" pressure profile; this target profile is then displayed continuously on the VDU.
- the subject is prompted by the computer to commence the testing phase.
- the subject breathes in again through the hand-held unit 10, and a trace of the measured pressure M is built up on the VDU, as shown in Figure 3: thus, as the subject breathes in, he can visually compare his performance against the target profile being displayed.
- the computer continuously calculates an integral of the trace which is being created (i.e. the area under the curve, therefore a measure of the work done) , and displays this accumulating figure on the VDU.
- the VDU also continuously displays the corresponding final integral of the target profile.
- the computer finds that the integral of the subject's measured trace exceeds the integral of the target profile by a predetermined margin (e.g. by 10%), then the computer regards the subject as having "passed” the test.
- the computer prompts the subject (via the VDU and/or by an audible signal) , to repeat the exercise, after an interval of 60 seconds.
- the test proceeds in this manner, until the subject has "passed " the test six times in succession (with 60 seconds between each test) . Then the test proceeds six more times, with a reduced interval (45 seconds) between successive tests, followed by six tests with 30 seconds intervals, six test with 15 second intervals, six tests with 10 seconds intervals, and finally six tests with 5 seconds intervals.
- the subject will fail to exceed his target.
- Figure 4 shows the results for a subject who passed all six tests for each of the 60, 45, 30 and 15 seconds intervals tests (A to D) , then passed four of the tests at 10 seconds intervals but then failed the next test. It will be appreciated that the results for this subject can be categorised as "E4".
- the results table shown in Figure 3 is displayed on the VDU, together with the accumulated total of the intervals under the test curves (being a measure of the total work done) . This information can be printed out, and is also stored by the computer in the data record for that subject.
- each subject improves his or her performance, firstly by progressing further through the full program of 36 tests, secondly by improving the accumulated "work done" figure, and also by improving the average peak pressure figure.
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NZ322972A NZ322972A (en) | 1995-11-28 | 1996-11-28 | Respiratory test apparatus |
AU77015/96A AU7701596A (en) | 1995-11-28 | 1996-11-28 | Respiratory test apparatus |
EP96940006A EP0871398A1 (en) | 1995-11-28 | 1996-11-28 | Respiratory test apparatus |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9524258.2 | 1995-11-28 | ||
GB9524258A GB2307641A (en) | 1995-11-28 | 1995-11-28 | Apparatus for testing respiratory ability |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1997019635A1 true WO1997019635A1 (en) | 1997-06-05 |
Family
ID=10784531
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/GB1996/002932 WO1997019635A1 (en) | 1995-11-28 | 1996-11-28 | Respiratory test apparatus |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP0871398A1 (en) |
CN (1) | CN1208335A (en) |
AU (1) | AU7701596A (en) |
CA (1) | CA2242847A1 (en) |
GB (1) | GB2307641A (en) |
NZ (1) | NZ322972A (en) |
WO (1) | WO1997019635A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101310678B (en) * | 2008-05-07 | 2010-06-02 | 上海力申科学仪器有限公司 | Measuring method of anesthesia apparatus tidal volume |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NO301210B1 (en) * | 1994-12-14 | 1997-09-29 | Camtech As | Use of sensors to measure an individual's respiration time volume |
DE19713636A1 (en) * | 1997-04-02 | 1998-10-08 | Pari Gmbh | Breath simulator |
KR20050049987A (en) * | 2003-11-24 | 2005-05-27 | 삼공물산 주식회사 | Circuit for displaying remainder of air respirator |
EP1978460B1 (en) | 2007-04-05 | 2014-01-22 | ResMed R&D Germany GmbH | Monitoring device and method |
US9833583B2 (en) | 2009-03-20 | 2017-12-05 | Koninklijke Philips N.V. | System and method for adjusting tidal volume of a self-ventilation subject |
CN105381570B (en) * | 2015-12-29 | 2018-11-13 | 中国人民解放军成都军区总医院 | A kind of portable intelligent respiratory training device and method |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3991304A (en) * | 1975-05-19 | 1976-11-09 | Hillsman Dean | Respiratory biofeedback and performance evaluation system |
US4495944A (en) * | 1983-02-07 | 1985-01-29 | Trutek Research, Inc. | Inhalation therapy apparatus |
EP0328415A1 (en) * | 1988-02-10 | 1989-08-16 | Sherwood Medical Company | Pulmonary function tester |
US4984158A (en) * | 1988-10-14 | 1991-01-08 | Hillsman Dean | Metered dose inhaler biofeedback training and evaluation system |
EP0667168A1 (en) * | 1994-02-14 | 1995-08-16 | Circadian, Inc. | An inhalation training device |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2133157B (en) * | 1982-10-09 | 1986-02-19 | Richard Bernhard Richardson | Electronic lung function analyser |
GB8923982D0 (en) * | 1989-10-25 | 1989-12-13 | Clement Clarke Int | Measurement apparatus |
GB9108370D0 (en) * | 1991-04-18 | 1991-06-05 | Clement Clarke Int | Measurement apparatus |
GB2267758A (en) * | 1992-05-28 | 1993-12-15 | Nagano Limited | Airflow measuring device |
US5373851A (en) * | 1993-04-19 | 1994-12-20 | Brunswick Biomedical Corporation | Specialized peak flow meter |
-
1995
- 1995-11-28 GB GB9524258A patent/GB2307641A/en not_active Withdrawn
-
1996
- 1996-11-28 EP EP96940006A patent/EP0871398A1/en not_active Withdrawn
- 1996-11-28 AU AU77015/96A patent/AU7701596A/en not_active Abandoned
- 1996-11-28 CN CN 96199798 patent/CN1208335A/en active Pending
- 1996-11-28 NZ NZ322972A patent/NZ322972A/en unknown
- 1996-11-28 CA CA 2242847 patent/CA2242847A1/en not_active Abandoned
- 1996-11-28 WO PCT/GB1996/002932 patent/WO1997019635A1/en not_active Application Discontinuation
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3991304A (en) * | 1975-05-19 | 1976-11-09 | Hillsman Dean | Respiratory biofeedback and performance evaluation system |
US4495944A (en) * | 1983-02-07 | 1985-01-29 | Trutek Research, Inc. | Inhalation therapy apparatus |
EP0328415A1 (en) * | 1988-02-10 | 1989-08-16 | Sherwood Medical Company | Pulmonary function tester |
US4984158A (en) * | 1988-10-14 | 1991-01-08 | Hillsman Dean | Metered dose inhaler biofeedback training and evaluation system |
EP0667168A1 (en) * | 1994-02-14 | 1995-08-16 | Circadian, Inc. | An inhalation training device |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101310678B (en) * | 2008-05-07 | 2010-06-02 | 上海力申科学仪器有限公司 | Measuring method of anesthesia apparatus tidal volume |
Also Published As
Publication number | Publication date |
---|---|
CA2242847A1 (en) | 1997-06-05 |
EP0871398A1 (en) | 1998-10-21 |
GB9524258D0 (en) | 1996-01-31 |
CN1208335A (en) | 1999-02-17 |
GB2307641A (en) | 1997-06-04 |
NZ322972A (en) | 1998-12-23 |
AU7701596A (en) | 1997-06-19 |
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