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Publication numberUS3710780 A
Publication typeGrant
Publication dateJan 16, 1973
Filing dateAug 5, 1971
Priority dateAug 5, 1971
Publication numberUS 3710780 A, US 3710780A, US-A-3710780, US3710780 A, US3710780A
InventorsMilch R
Original AssigneeMilch R
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Respiratory device with variable expiratory pressure resistance
US 3710780 A
Abstract
A device to permit more efficient breathing by medical patients comprising a mouthpiece having a passage portion for communication with the patient's mouth and inlet and outlet passages communicating with the first passage portion. The inlet and outlet passages are provided, respectively, with inlet and outlet check valves. A flexible conduit extends from the outlet check valve portion of the mouthpiece to a receptacle containing a liquid and the outlet end of the flexible conduit is immersed in the liquid to an adjusted depth to interpose a predetermined variable fluid resistance to air flow from said mouthpiece outlet passage by way of said conduit.
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Description  (OCR text may contain errors)

United States Patent 1 Milch I [111 3,710,780 [451' Jan. 1 ,1973

[541 RESPIRATORY DEVICE WITH VARIABLE EXPIRATORY PRESSURE RESISTANCE [76] Inventor: Robert A. Milch, 1405 North Forest Rd., Buffalo, NY 14221 22 Filed: Aug.5. 1971 211 Appl.N0.: 169,252

[52] U.S. Cl ..128/25 R, 272/57 F [51] Int. Cl. ..A6lh 1/02 [58] Field of Search ..l28/2, 25 R; 272/57 R, 57 F {56] References Cited UNITED STATES PATENTS 3,511,228 5/1970 Lundgren et al ..l28/25 R FOREIGN PATENTS OR APPLICATIONS 779,571 l/l935 France ..272/57 F Primary Examinef-Lawrence W. Trapp Attorney-Conrad Christel et al.

[57] ABSTRACT A device to permit more efficient breathing by medical patients comprising a mouthpiece having a passage portion for communication with the patients mouth and inlet and outlet passages communicating with the first passage portion. The inlet and outlet passages are provided, respectively, with inlet and outlet check valves. A flexible conduit extends from the outlet check valve portion of the mouthpiece to a receptacle containing a liquid and the, outlet end of the flexible conduit is immersed in the liquid to an adjusted depth to interpose a predetermined variable fluid resistance to air flow from said mouthpiece outlet passage by way of said conduit. I v Claims, 1 Drawing Figure PATENTED JAN 1 6 I975 INVENTOR v ROBERT A. MILCH l llll|lllllllllll|||l|||lll ATTOR N EYS RESPIRATORY DEVICE WITH VARIABLE EXPIRATORY' PRESSURE RESISTANCE BACKGROUND OF THE INVENTION This invention relates to apparatus particularly for use by patients with respiratory problems, as for instance, post-operative patients, and those with atelectasis, pneumonia, chronic bronchitis, and emphysema.

In certain medical cases patients tend to breathe shallowly, clear their pulmonary secretions poorly, or have some obstruction to satisfactory oxygenation of their blood, and there is a need to promote more efficient breathing. Present methods with this end in view are makeshift and unsatisfactory. For instance, there is what is known as a rebreathing device wherein the patient inhales from and exhales into a closed chamber, such as a bag. Since the air supply thus available increases rapidly in carbon dioxide content, and lowers in oxygen content, the patient must breathe more to survive. However, it usually results in the patient breathing faster rather than deeper,-and this technique is actually dangerous in some cases due to the limited oxygen supply.

In another method the patient uses a mouthpiece for breathing and forced blasts of air under pressure are introduced into the mouthpiece during inspiration to promote deeper inhalation. This method is known in the medical arts as intermittent positive pressure breathing and is objectionable for several reasons: it requires costly and complicated equipment and trained personnel to administer, it is frequently uncomfortable and distressing to the patient, air maybe driven into the stomach instead of into the lungs and secretions may be pushed deeper into the air passages.

SUMMARY OF THE INVENTION The apparatus of the present invention includes a mouthpiece through which the patient breathes. The mouthpiece has air inlet and outlet portions and the inlet portion is provided with an. inwardly directed check valve which opens freely when the patient inhales to permit inhalation of ambient air for breathing. The outlet portion has an outwardly directed check valve which opens freely when the patient exhales to permit free passage of exhalation. In addition to the outwardly directed check valve the outlet portion of the mouthpiece includes a tube or conduit which leads from just beyond the outwardly directed expiratoryvalve and has its discharge end immersed in a body of water. Thus, upon exhalation, the patient must produce sufficient expiratory pressure to discharge exhalation from the tube into the body of water against the head of liquid which is present between the bottom discharge end of the tube and the surface of the body of water. The depth of immersion of the tube in the water is controlled and adjustable to provide accurately regulated fluid resistance to exhalation.

Thus the patient must exert a predetermined controlled degree of expiratory pressure in order to move the exhalation out of the discharge tube and through the head of water. The exhalatory pressure thus generated dilates the patients bronchi,.thus permitting better mixture and absorption of inspired air, and'more efficient clearing of trapped secretions.

top plan view with portions shown in crosssection for v clearer illustration and an associated receptacle adapted to contain an open body of water into which the outlet conduit from the mouthpiece discharges.

DESCRIPTION OF THE ILLUSTRATED EMBODIMENT In the drawing the numeral 1 designates a cylindrical valve body having a conduit portion 2 extending medially therefrom. A mouthpiece 3 is fitted over conduit portion 2 and has a mouth-engaging portion 4 with opposed arcuate channels 5 into which the patients teeth fit in gripping the mouthpiece orally. The portion of mouthpiece 3 which fits over conduit portion 2 of valve body 1 is preferably of somewhat elastic material so as to stretch over and fit snugly about conduit portion 2.

Valvebody 1 has an inlet' end 6 and an outlet end 7. Inlet end 6 is provided with a freely flexible disc valve 8 which is fixed medially in a tubular insert 9 by means of a transverse pin 10. The two halves of valve 8 may flex freely to the right as viewed in the drawing under external air pressure but seat against a bushing or collar 11 under air pressure from within the valve body.

The outlet end 7 of valve body 1 is provided with a freely flexible disc valve 12 which is fixed along a diametral line to a cylindrical insert 13 by a transversely extending pin 14. The two halves of valve 12 may 7 flex freely to the right as viewed in the drawing under air pressure from within valve body 1 but seat against a' collar 15 under pressure from the right-hand side of valve 12 as viewed in the drawing.

A flexible conduit 16 extends from the outlet end of valve body 1 and in the present instance has an enlarged end portion 17 which fits snugly thereovenConduit 16 extends to a receptacle 18 which may comprise a graduated transparent cylinder containing water to a predetermined level as indicated at 19. The outletconduit 16 from the valve body extends into the water 19 and is supported at the upper end of receptacle 18 by a bracket 20 which permits free vertical adjustment of conduit 16 to determine the depth of immersion of the end of conduit 16 in the water. I

Since the fluid resistance to discharge-of air into the water from conduit 16 is directly proportional to' thehead of water above the discharge end of conduit 16, the resistance to discharge of air from conduit 16, and

consequently from valve body 1,, may be accurately the underlying principles of the invention but it is to be passage for mouth breathing, a check valve in said inletpassage permitting air flow into said mouthpiece but 2. Respiratory apparatus as in claim 1 wherein said means for preventing retrograde fluid flow from said conduit to said outlet passage comprises a check valve in said outlet passage.

3. Respiratory apparatus as in claim 1 wherein said check valve comprises a flexible disconnected to said inlet passage at opposite diametral points whereby the two halves thereof flex freely in the direction of fluid flow, and an annular seat portion adjacent to said valve at the outer side thereof to the opposite direction.

4. Respiratory apparatus as in claim 2 wherein said check valve comprises flexible disc s connected to said passages at opposite diametral points whereby the two halves of each valve flex freely in the direction of air flow, and annularseat portions in said passages adprevent flexure thereof in 'jace'nt to said valves to prevent flexure thereof in the opposite direction.

5. Respiratory apparatus as in claim 1 wherein said receptacle-is graduated to show the depth of liquid therein and the depth of immersion of said outlet conduit terminal portion.

6. Respiratory apparatus as in claim 5 wherein said receptacle includes adjustable means for supporting said outlet conduit to support the same for immersion f to various depths in said liquid.

a a a a: 4 I

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US3511228 *May 28, 1965May 12, 1970Lundgren Claes Erik GunnarBronchial dilator for patients suffering from emphysema and asthma or the like
FR779571A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3977395 *Feb 20, 1975Aug 31, 1976Peter Nelson BrawnCombination inhalation and exhalation respiratory therapy device
US3977399 *Apr 15, 1975Aug 31, 1976Peter Nelson BrawnPositive pressure and volume measure respiratory device
US4533137 *Mar 13, 1984Aug 6, 1985Healthscan Inc.Pulmonary training method
US4739987 *Oct 28, 1985Apr 26, 1988Nicholson Marguerite KFor creating inhalation/exhalation resistance
US5109840 *Feb 14, 1991May 5, 1992Specialty Packaging Licensing CompanyResuscitator having directional control valve with internal "PEEP" adjustment valve
US5649533 *Jun 6, 1994Jul 22, 1997Oren; NathanTherapeutic respiration device
US6581598 *Nov 24, 1999Jun 24, 2003Dhd Healthcare CorporationPositive expiratory pressure device
US6631716 *Jul 16, 1999Oct 14, 2003The Board Of Trustees Of The Leland Stanford Junior UniversityDynamic respiratory control
US6776159Jan 3, 2003Aug 17, 2004Dhd Healthcare CorporationPositive expiratory pressure device with bypass
US7059324Mar 24, 2003Jun 13, 2006Smiths Medical Asd, Inc.Positive expiratory pressure device with bypass
US8225787Feb 4, 2009Jul 24, 2012Wet Nose Technologies, LlcAdjustable pressure device and system thereof
US8235042Aug 31, 2007Aug 7, 2012Wet Nose Technologies, LlcExhalatory pressure device and system thereof
US8251876Apr 22, 2008Aug 28, 2012Hill-Rom Services, Inc.Breathing exercise apparatus
US8327849Oct 28, 2009Dec 11, 2012Trudell Medical InternationalOscillating positive expiratory pressure device
US8381723Oct 6, 2010Feb 26, 2013Seattle Children's HospitalBroad-band, low frequency, high-amplitude, long time duration, oscillating airway pressure breathing apparatus and method utilizing bubbles
US8485179Feb 23, 2010Jul 16, 2013Trudell Medical InternationalOscillating positive expiratory pressure device
US8499759Oct 6, 2010Aug 6, 2013Seattle Children's HospitalBroad-band, low frequency, high-amplitude, long time duration, oscillating airway pressure breathing apparatus and method utilizing bubbles
US8539951May 26, 2009Sep 24, 2013Trudell Medical InternationalOscillating positive respiratory pressure device
US8783247Feb 4, 2010Jul 22, 2014Wet Nose Technologies, Llc.Pressure release systems, apparatus and methods
CN102046232BApr 8, 2009Jul 2, 2014西雅图儿童医院d/b/a西雅图儿童研究所利用气泡的宽带、低频、高幅、长持续时间、振荡气道压力呼吸设备及方法
WO2009126739A1 *Apr 8, 2009Oct 15, 2009Seattle Children's Hospital Research InstituteBroad-band, low frequency, high-amplitude, long time duration, oscillating airway pressure breathing apparatus and method utilizing bubbles
WO2011004274A1 *Jun 16, 2010Jan 13, 2011Koninklijke Philips Electronics, N.V.System and method for entraining the breathing of a subject
WO2014026227A1 *Aug 13, 2013Feb 20, 2014Physiotherapydynamics Pty. Ltd.Oscillatory positive expiratory pressure apparatus
Classifications
U.S. Classification601/41, 482/13
International ClassificationA63B23/00, A63B23/18
Cooperative ClassificationA63B23/18
European ClassificationA63B23/18