GB2307641A - Apparatus for testing respiratory ability - Google Patents

Apparatus for testing respiratory ability Download PDF

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Publication number
GB2307641A
GB2307641A GB9524258A GB9524258A GB2307641A GB 2307641 A GB2307641 A GB 2307641A GB 9524258 A GB9524258 A GB 9524258A GB 9524258 A GB9524258 A GB 9524258A GB 2307641 A GB2307641 A GB 2307641A
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GB
United Kingdom
Prior art keywords
target
subject
profile
pressure
test
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB9524258A
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GB9524258D0 (en
Inventor
Kenneth Chatham
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MEDRUS TECH Ltd
Original Assignee
MEDRUS TECH Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by MEDRUS TECH Ltd filed Critical MEDRUS TECH Ltd
Priority to GB9524258A priority Critical patent/GB2307641A/en
Publication of GB9524258D0 publication Critical patent/GB9524258D0/en
Publication of GB2307641A publication Critical patent/GB2307641A/en
Withdrawn legal-status Critical Current

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Classifications

    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B23/00Exercising apparatus specially adapted for particular parts of the body
    • A63B23/18Exercising apparatus specially adapted for particular parts of the body for improving respiratory function
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Measuring for diagnostic purposes; Identification of persons
    • A61B5/08Detecting, measuring or recording devices for evaluating the respiratory organs
    • A61B5/087Measuring breath flow

Abstract

The apparatus comprises a unit 10 through which the subject can inspire, the unit including a pressure sensing device (such as a manometer) connected to a data processing unit 20 which is arranged to compare the time-varying pressure, or a parameter thereof, with a pre-stored target. The target may comprise a time-varying pressure profile taken from the subject during a pre-test trial inspiration. The peak pressure or integral of the target profile, or the average peak pressure or accumulated integral of successive tests, may be displayed.

Description

Respirators Test Apparatus The present invention relates to an apparatus for testing the respiratory ability of subjects.
There are a number of situations where it is necessary or desirable to test the respiratory ability of a subject, and indeed to improve that ability. For example, it is often necessary to test and improve the respiratory ability of a patient prior to a surgical operation and/or during the rehabilitation of such a patient. As another example, it is often desirable to improve the respiratory ability of athletes or other sportsmen.
I have now devised an apparatus for testing and improving the respiratory ability of subjects.
In accordance with the present invention, there is provided 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 timevarying pressure, or a parameter thereof, with a prestored target.
Preferably the apparatus is arranged to store a target for each individual subject. Preferably 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. Additionally or instead, the target may comprise an integral of the trial inspiration pressure profile, reduced by a predetermined fraction. Preferably 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.
Preferably, the apparatus prompts the subject to commence each successive inspiration (e.g. by means of a display and/or audible signal). Preferably a set of successive tests (e.g.
six tests) are carried out with the same interval (e.g. 60 seconds) between them, then a second set of tests are carried out with a smaller internal (e.g. 45 seconds) between them, and so on.
At each test, 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. At some stage, 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.
During each test, preferably 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.
Preferably the apparatus requires the measured timevarying 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). Preferably also the apparatus requires the duration of the measured time-varying profile to exceed a predetermined fraction (e.g. 30%) of the duration of the target profile.
Preferably 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).
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. These results therefore provide an effective assessment of the subject's respiratory muscles.
Through use of the above-described apparatus in successive sessions, I have found that the subject's respiratory ability improves significantly (particularly muscle strength and endurance).
An embodiment of the present invention will now be described by way of example only and with reference to the accompany drawings, in which: 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; and FIGURE 4 is a typical results grid following a test session.
Referring to Figure 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. 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: thuc 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. In an initial phase, 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 then 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.
After a rest, the subject is prompted by the computer to commence the testing phase. Thus, 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.
Also 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.
If at the end of this test 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 then 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. However, at some stage during this test program, the subject will fail to exceed his target.
Thus, Fiaure 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.
At the next session of use by the same subject, the subject undergoes an initial phase as described above, and a new target profile is created in the same manner. The test then proceeds as described above.
It will be appreciated that as a result of successive sessions of use of the apparatus, 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.

Claims (12)

Claims
1) An apparatus for testing the respiratory ability of one or more subjects, the apparatus comprising a unit through which a subject can inspire, said unit including a pressure sensing device, and a data processing unit to which the pressure sensing device is connected, said data processing unit being arranged to compare the time-varying pressure, or a parameter thereof, with a prestored target.
2) An apparatus as claimed in claim 1, arranged to store a said target for each individual subject.
3) An apparatus as claimed in claim 2, in which each said target comprises a time-varying pressure profile taken from the subject during a pre-test trial inspiration reduced by a predetermined fraction in pressure amplitude.
4) An apparatus as claimed in claim 2, in which each said target comprises an integral of a trial inspiration pressure profile, reduced by a predetermined fraction.
5) An apparatus as claimed in any preceding claim, arranged for the subject to carry out successive test inspiration, the measured results of each of these being compared against the target, with the time intervals between successive tests being progressively reduced.
6) An apparatus as claimed in claim 5, arranged to prompt the subject to commence each successive inspiration.
7) An apparatus as claimed in claim 5 or 6, arranged to record the point in an overall program of tests at which the subject fails a test.
8) An apparatus as claimed in any preceding claim, arranged to display the prestored target and to build up a display of the measured profile as the subject breathes in.
9) An apparatus as claimed in any preceding claim, arranged to require the measured time-varying profile to exceed the target profile by a predetermined margin, in terms of the integral of the corresponding curve.
10) An apparatus as claimed in any preceding claim, arranged to require the duration of the measured time-varying profile to exceed a predetermined fraction of the duration of the target profile.
11) An apparatus as claimed in any preceding claim, arranged to display one or more of: the peak pressure of the target profile, the average peak pressure from the successive tests, the integral of the target profile, and the accumulated integral of the successive tests.
12) An apparatus for testing the respiratory ability of one or more subjects, the apparatus being substantially as herein described with reference to the accompanying drawings.
GB9524258A 1995-11-28 1995-11-28 Apparatus for testing respiratory ability Withdrawn GB2307641A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9524258A GB2307641A (en) 1995-11-28 1995-11-28 Apparatus for testing respiratory ability

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
GB9524258A GB2307641A (en) 1995-11-28 1995-11-28 Apparatus for testing respiratory ability
EP19960940006 EP0871398A1 (en) 1995-11-28 1996-11-28 Respiratory test apparatus
CN 96199798 CN1208335A (en) 1995-11-28 1996-11-28 Respiratory test apparatus
PCT/GB1996/002932 WO1997019635A1 (en) 1995-11-28 1996-11-28 Respiratory test apparatus
AU77015/96A AU7701596A (en) 1995-11-28 1996-11-28 Respiratory test apparatus
NZ32297296A NZ322972A (en) 1995-11-28 1996-11-28 Respiratory test apparatus
CA 2242847 CA2242847A1 (en) 1995-11-28 1996-11-28 Respiratory test apparatus

Publications (2)

Publication Number Publication Date
GB9524258D0 GB9524258D0 (en) 1996-01-31
GB2307641A true GB2307641A (en) 1997-06-04

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
GB9524258A Withdrawn GB2307641A (en) 1995-11-28 1995-11-28 Apparatus for testing respiratory ability

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 (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2324387B (en) * 1997-04-02 2001-10-03 Pari Gmbh Breath simulator
WO2010106451A1 (en) 2009-03-20 2010-09-23 Koninklijke Philips Electronics, N.V. System and method for adjusting tidal volume of a self-ventilating subject

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO301210B1 (en) * 1994-12-14 1997-09-29 Camtech As Use of sensors for measuring an individual's respiration time volume
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
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
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 (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2133157A (en) * 1982-10-09 1984-07-18 Richard Bernhard Richardson Electronic lung function analyser
EP0328415A1 (en) * 1988-02-10 1989-08-16 Sherwood Medical Company Pulmonary function tester
GB2254925A (en) * 1991-04-18 1992-10-21 Clement Clarke Int Respiratory measurement apparatus
US5211180A (en) * 1989-10-25 1993-05-18 Clement Clarke International Limited Respiratory test apparatus
GB2267758A (en) * 1992-05-28 1993-12-15 Nagano Limited Airflow measuring device
WO1994023650A1 (en) * 1993-04-19 1994-10-27 Brunswick Biomedical Corporation Specialized peak flow meter

Family Cites Families (4)

* Cited by examiner, † Cited by third party
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
US4984158A (en) * 1988-10-14 1991-01-08 Hillsman Dean Metered dose inhaler biofeedback training and evaluation system
EP0667168B1 (en) * 1994-02-14 2000-06-21 Aradigm Corporation An inhalation training device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2133157A (en) * 1982-10-09 1984-07-18 Richard Bernhard Richardson Electronic lung function analyser
EP0328415A1 (en) * 1988-02-10 1989-08-16 Sherwood Medical Company Pulmonary function tester
US5211180A (en) * 1989-10-25 1993-05-18 Clement Clarke International Limited Respiratory test apparatus
GB2254925A (en) * 1991-04-18 1992-10-21 Clement Clarke Int Respiratory measurement apparatus
GB2267758A (en) * 1992-05-28 1993-12-15 Nagano Limited Airflow measuring device
WO1994023650A1 (en) * 1993-04-19 1994-10-27 Brunswick Biomedical Corporation Specialized peak flow meter

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2324387B (en) * 1997-04-02 2001-10-03 Pari Gmbh Breath simulator
WO2010106451A1 (en) 2009-03-20 2010-09-23 Koninklijke Philips Electronics, N.V. System and method for adjusting tidal volume of a self-ventilating subject
JP2012520718A (en) * 2009-03-20 2012-09-10 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ System and method for regulating the breathing volume of a spontaneous breathing subject
RU2538178C2 (en) * 2009-03-20 2015-01-10 Конинклейке Филипс Электроникс, Н.В. System and method for respiratory volume control of self-ventilated object
AU2010224538B2 (en) * 2009-03-20 2015-05-28 Koninklijke Philips Electronics N.V. System and method for adjusting tidal volume of a self-ventilating subject
US9833583B2 (en) 2009-03-20 2017-12-05 Koninklijke Philips N.V. System and method for adjusting tidal volume of a self-ventilation subject

Also Published As

Publication number Publication date
CN1208335A (en) 1999-02-17
WO1997019635A1 (en) 1997-06-05
EP0871398A1 (en) 1998-10-21
GB9524258D0 (en) 1996-01-31
NZ322972A (en) 1998-12-23
AU7701596A (en) 1997-06-19
CA2242847A1 (en) 1997-06-05

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