US3866606A - Cyclically produced contoured support - Google Patents

Cyclically produced contoured support Download PDF

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Publication number
US3866606A
US3866606A US393909A US39390973A US3866606A US 3866606 A US3866606 A US 3866606A US 393909 A US393909 A US 393909A US 39390973 A US39390973 A US 39390973A US 3866606 A US3866606 A US 3866606A
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United States
Prior art keywords
patient
granular material
mass
gas
motor
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Expired - Lifetime
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US393909A
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English (en)
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Thomas S Hargest
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Individual
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Priority to US393909A priority Critical patent/US3866606A/en
Priority to DE2440887A priority patent/DE2440887C2/de
Priority to FR7429822A priority patent/FR2242074B1/fr
Priority to GB3853374A priority patent/GB1458458A/en
Application granted granted Critical
Publication of US3866606A publication Critical patent/US3866606A/en
Priority to BE162038A priority patent/BE835771Q/xx
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G7/00—Beds specially adapted for nursing; Devices for lifting patients or disabled persons
    • A61G7/05—Parts, details or accessories of beds
    • A61G7/057—Arrangements for preventing bed-sores or for supporting patients with burns, e.g. mattresses specially adapted therefor
    • A61G7/05738—Arrangements for preventing bed-sores or for supporting patients with burns, e.g. mattresses specially adapted therefor with fluid-like particles, e.g. sand, mud, seeds, gel, beads
    • A61G7/05746—Arrangements for preventing bed-sores or for supporting patients with burns, e.g. mattresses specially adapted therefor with fluid-like particles, e.g. sand, mud, seeds, gel, beads fluidised by air flow

Definitions

  • ABSTRACT Apparatus for and method of cyclically forming a precisely contoured support for a patient requiring a fixed position, as for example, undergoing traction, by means of periodically fluidizing granular material dis posed within a container which upon successive fluidization forms the contoured support to distribute pres sure over a substantial portion of the body of a patient in avoidance of concentrated pressure on restricted areas thereof.
  • the contoured support of the patients body is cyclically produced to permit change of position and at the same time to prevent movement of the patient in the direction of application of tensional forces.
  • the fluidization part of the cycle is short, of the order of three (3) seconds in every cycle of around ten (10) minutes duration. Were it not for cyclical reforming of the contoured support, any change of position by the patient or any appearance of edema and the like, would give rise to pressure points to the detriment of the health of the skin tissue in the pressure areas.
  • FIG. 1 diagrammatically illustrates an apparatus and system embodying a preferred form of the invention
  • FIG. 2 is a fractional sectional view taken on the lines 2-2 of FIG. 3;
  • FIG. 3 is an exploded perspective view of the contour-support of FIG. ll.
  • an open-top tank or container 10 of material which can be fiberglass, steel or epoxy-coated wood, has near its lower portion an expanded metal grate l1 suitably supported above the lower wall 10A of the container to provide a plenum chamber 12.
  • the grate 11 is covered with porous sheet material 13. It acts as a diffuser permitting upward flow of air and preventing passage of the granular material into the plenum chamber 12.
  • the container 10 above grate 11 is partly filled with granular material 14.
  • a pipe 15 through which gas, such as air, is driven under pressure by a fan or air pump 16 driven by a motor 17.
  • a loosely fitting impervious vinyl sheet 10 affixed to the container Disposed over the bed or mass of granular material 14, is a loosely fitting impervious vinyl sheet 10 affixed to the container.
  • the vinyl sheet is provided with a plurality of openings 19 distributed along opposite side portions of the sheet 18. Though. these openings can vary as to number, size and location, in one form of the invention four round openings of about 2 inches in diameter have been found to be satisfactory.
  • Beneath each opening is a layer of perforate material 20 suitably bonded to the vinyl sheet 18 as by adhesive or thermal bonding.
  • the granular material cannot escape through the openings 19 and air flow encounters low resistance.
  • a real saving is realized over a porous sheet coextensive with the length and breadth of the container 10.
  • a patient 21 is lying on the imperforate vinyl sheet 18. His right leg, as shown, is attached as by a pin 22 to a cord 23, passing over a pulley 24.
  • the cord 23 terminates in a platform 25 to which there may be applied one or more of the weights 26 to apply the desired degree of traction to the right leg. If the patient were supported on a normal hospital bed, the degree of traction would be limited to that amount which would not cause the patient to be moved along the bed in the direction of application of the tensional forces. In accordance with the present invention, a much higher traction-al force can be applied without causing the patient to slide along the supporting sheet 18, as will soon be explained.
  • a control system has been diagrammatically illustrated in FIG. 1 with the parts in position corresponding to the beginning of a cycle, i.e., with line switch 30 closed.
  • the motor 17 drives the fan 16 to fluidize the bed.
  • the granular material 14 will take on the characteristics of a fluid of high specific gravity when the pressure within pipe 15 rises to within the range of between 18 inches of water and 21 inches of water, (corresponding respectively with pressures of 0.65 pounds per square inch and 0.76 pounds per square inch gauge).
  • the pressure within pipe 15 is measured by conventional means such as a manometer or pressure gauge 31 which closes contacts 32 when a selected pressure is attained.
  • That pressure within the foregoing range will be selected in terms of the weight of the patient and will be high enough to assure that degree of fluidization which will to a slight degree, about 1 to linch, float the patient. This is adequate for the reformation of the contour support to relieve pressure points and to permit some change of position.
  • the granular material moves the vinyl sheet 18 upwardly about the patients body throughout the length and breadth thereof and forms the supporting surface precisely contoured to the body. It is, in effect, three-dimensional since it has length, width and depth. As fluidization terminates, the granular material is closely compacted to form a relatively rigid patient-restraining three-dimensional support of great value in treating patients where body constraint is essential to treatment or convalescence from surgical or other medical procedures.
  • a relay 34 is energized from the source of supply to open the energizing circuit of the motor 17, which it will be observed includes the contacts 35 of a timer 36.
  • the motor and fan 16 slow down, the pressure falls and the contacts 32 open. This occurs in a few seconds, a time interval long enough for the granular material to re-shape itself and as a relatively rigid mass (absent fluidization) form the contoured supporting surface coextensive with the backside of the patient from head to foot.
  • the timer motor of timer 36 through suitable gearing opens its contacts after each cycle of operation of the motor 17 and maintains them open for the selected time of about 8 to 10 minutes.
  • the time required to fluidize the mass 14 is relatively short. Because the on-time of motor 17 is very short relative to its off-time, there is realized real economy in the operation.
  • a patient is healthy except for the disability of a portion of the body which requires immobilization as a whole, he is quite likely to wish to change position and may, in any event, endeavor to do so even if supported by a mold forming to the shape of his body, thus creating pressure points.
  • the patient is provided with a precisely contoured support which accommodates changed positions, contributing greatly to the comfort of the patient.
  • traction produces pain by use of normal equipment, it has been found that in accordance with this invention, much less pain if any, is experienced. The patient is more relaxed and pressure points are avoided. Healing is thus aided with greater comfort to the patient.
  • the container 10' is about half the depth of the earlier invention notwithstanding there have been retained a grate 37 over which there is disposed the intermediate or sheet material 13.
  • the granular material while illustrated as a rectangular block 14, comprises a loose mass of such material, for example silicone-coated glass beads, in the range of 0.002 inch to 0.05 inch which are not coherent one to another, and which are fluidized by a passage therethrough of air.
  • some forty-odd cubic feet per minute of air at 18 inches to 21 inches of water pressure per square inch can be used to fluidize the granular material 14 to achieve the repeated formation of the precisely contoured support for the patient.
  • the supporting sheet 18 which, as earlier stated, may be imperforate vinyl which may be readily washed and sterilized,
  • the fluidization part of the cycle is measured in terms of a few seconds.
  • the container is smaller.
  • glass spheres were required having a total weight of about 2,600 pounds.
  • the motor 15 need be operated only long enough to cause fluidization which causes a rise in the fluidized material. It need be but of the order of only about A inch to 7% inch, this being sufficient indication that fluidization has taken place to the degree needed for the formation of the second and subsequently precisely contoured supports.
  • the timing controls may be disabled by closure of the switch 40. This then connects the motor 17 directly to the source of supply.
  • the blanket interposed between the vinyl sheet 18 and the patient may be replaced by simply pressing downwardly on the fluidized mass and then moving it lengthwise of the patient in a progressive manner. Thus the blanket is removed without change of position of the patient. A fresh blanket is placed in position by reversing the just described steps.
  • the method of repeatedly forming a precisely contoured support for a patient undergoing traction which comprises:
  • control means for cyclically energizing said motor to drive said pump to fluidize said mass for a short interval of time to provide in each cycle of said operation a three-dimensional uniform support over all parts of a substantial portion of the body of a patient in avoidance of concentrated pressure on restricted areas thereof, said control means after expiration of said short interval deenergizing said motor to terminate said flow of gas, said granular material then forming a relatively rigid, patient-restraining, precisely contoured, three-dimensional support over which the pressure thereon of the patient is evenly distributed in avoidance of said concentrated pressure on restricted areas thereof, and said control means
  • over riding control means for selectively operating said motor continuously to drive said air pump to fluidize said mass of granular material during periods of time long enough to permit body care of the patient, as for example, replacement of bedding by movement thereof downwardly in the fluidized mass and progressively lengthwise of the patient and including similar downward movement into the fluidized mass of a bedpan which is then held in place by said granular material upon termination of said flow of gas.
  • control means includes pressure responsive means operating in response to the pressure of the gas producing said fluidization for deenergizing said motor when said gas pressure rises to a value indicative of fluidization of said mass of granular material.

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  • Health & Medical Sciences (AREA)
  • Nursing (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Invalid Beds And Related Equipment (AREA)
  • Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
US393909A 1973-09-04 1973-09-04 Cyclically produced contoured support Expired - Lifetime US3866606A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US393909A US3866606A (en) 1973-09-04 1973-09-04 Cyclically produced contoured support
DE2440887A DE2440887C2 (de) 1973-09-04 1974-08-27 Verfahren und Vorrichtung zur dem menschlichen Körper angepaßten Lagerung auf einem der Form des Körpers sich anpassenden Bett aus körnigem Material
FR7429822A FR2242074B1 (enrdf_load_stackoverflow) 1973-09-04 1974-09-02
GB3853374A GB1458458A (en) 1973-09-04 1974-09-03 Cyclically produced contoured support
BE162038A BE835771Q (fr) 1973-09-04 1975-11-20 Support profile produit cycliquement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US393909A US3866606A (en) 1973-09-04 1973-09-04 Cyclically produced contoured support

Publications (1)

Publication Number Publication Date
US3866606A true US3866606A (en) 1975-02-18

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Family Applications (1)

Application Number Title Priority Date Filing Date
US393909A Expired - Lifetime US3866606A (en) 1973-09-04 1973-09-04 Cyclically produced contoured support

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US (1) US3866606A (enrdf_load_stackoverflow)
BE (1) BE835771Q (enrdf_load_stackoverflow)
DE (1) DE2440887C2 (enrdf_load_stackoverflow)
FR (1) FR2242074B1 (enrdf_load_stackoverflow)
GB (1) GB1458458A (enrdf_load_stackoverflow)

Cited By (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54128196A (en) * 1978-03-28 1979-10-04 Sapooto Shisutemuzu Intern Bed for hospital that use solid particle medium fluidized
US4185341A (en) * 1976-11-08 1980-01-29 The Institute Of Orthopaedics Support appliance
US4483029A (en) * 1981-08-10 1984-11-20 Support Systems International, Inc. Fluidized supporting apparatus
US4541418A (en) * 1982-08-25 1985-09-17 J. A. Preston Corporation Simulated hydrotherapy bath
US4637083A (en) * 1985-03-13 1987-01-20 Support Systems International, Inc. Fluidized patient support apparatus
US4642825A (en) * 1985-07-08 1987-02-17 Fuji Electric Co., Ltd. Control apparatus for clinic bed
US4686723A (en) * 1985-11-14 1987-08-18 The University Of Toronto Innovations Foundation Semi-fluidized bed
US4694520A (en) * 1986-01-15 1987-09-22 Ssi Medical Services, Inc. Patient support apparatus
US4768250A (en) * 1985-07-30 1988-09-06 Fuji Electric Co., Ltd. Fluidized bead bed
US4794659A (en) * 1984-12-19 1989-01-03 Fuji Electric Company Ltd. Fluid bed system
US4835802A (en) * 1988-02-22 1989-06-06 The Kmw Group, Inc. Fluidization patient support control system
US4914760A (en) * 1988-12-20 1990-04-10 Ssi Medical Services, Inc. Fluidized bed with collapsible side
US4942635A (en) * 1988-12-20 1990-07-24 Ssi Medical Services, Inc. Dual mode patient support system
US4967431A (en) * 1988-12-20 1990-11-06 SSI Medical Servies, Inc. Fluidized bed with modular fluidizable portion
US5008965A (en) * 1988-07-11 1991-04-23 Kinetic Concepts, Inc. Fluidized bead bed
US5029352A (en) * 1988-12-20 1991-07-09 Ssi Medical Services, Inc. Dual support surface patient support
US5165141A (en) * 1991-01-11 1992-11-24 Ssi Medical Services, Inc. Spring loaded heavy duty caster system for supporting a fluidized patient support system
US5172781A (en) * 1989-10-27 1992-12-22 Kinetic Concepts, Inc. Scale for fluidized bed and method for using same
US5206896A (en) * 1991-12-13 1993-04-27 Hargest Thomas S Immobilization of domestic animals in a bed of fluidizable solid particles
US5235713A (en) * 1990-11-06 1993-08-17 Bio Clinic Corporation Fluid filled flotation mattress
US5441477A (en) * 1991-12-13 1995-08-15 Hargest; Thomas S. Method and apparatus for treating a patient by electro/fluidized bed therapy
US5447481A (en) * 1994-03-03 1995-09-05 Emter, Jr.; James Bench press exercise apparatus
US5539943A (en) * 1994-03-08 1996-07-30 Ssi Medical Services, Inc. Apparatus and method for percussion of fluidized support surface
US5587933A (en) * 1994-07-19 1996-12-24 Bcam International, Inc. Support enhancing device and associated method
US5649331A (en) * 1994-06-03 1997-07-22 Span-America Medical Systems, Inc. Self-adjusting pressure relief support system and methodology
US5787531A (en) * 1994-07-08 1998-08-04 Pepe; Michael Francis Inflatable pad or mattress
WO2000057830A1 (en) * 1999-03-29 2000-10-05 Kinetic Concepts, Inc. Fluidized bead bed with inflatable bead diffuser
US6308353B1 (en) * 1999-04-09 2001-10-30 The Or Group, Inc. Method and apparatus for positioning a patient
US6721979B1 (en) * 1995-04-25 2004-04-20 Kci Licensing, Inc. Air bed with fluidized bead surface and related methods
US20110099721A1 (en) * 2009-10-30 2011-05-05 Howell Charles A Weight efficient fluidized person-support apparatus
US20110138538A1 (en) * 2009-12-10 2011-06-16 Howell Charles A Weight efficient fluidized bed
US20140000039A1 (en) * 2012-06-27 2014-01-02 Frank Sauser Fluidizable Bed with Lateral Rotation Capability and Method of Operation Therefor
US9060908B2 (en) 2013-01-21 2015-06-23 Hill-Rom Services, Inc. Varying depth fluidized bed
US9549865B2 (en) 2009-09-02 2017-01-24 Allen Medical Systems, Inc. Surgical positioning system
US10238560B2 (en) 2013-03-13 2019-03-26 Hill-Rom Services, Inc. Air fluidized therapy bed having pulmonary therapy

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2546404B1 (fr) * 1983-05-27 1989-03-31 Fuji Electric Co Ltd Dispositif de commande d'un lit fluidise pour applications medicales
JPS59218151A (ja) * 1983-05-27 1984-12-08 富士電機株式会社 流動式ベツドの昇降制御装置
JPS59218152A (ja) * 1983-05-27 1984-12-08 富士電機株式会社 流動ベツドのかたさ制御装置
DE3901287A1 (de) * 1989-01-18 1990-07-26 Draegerwerk Ag Stuetzvorrichtung zur formangepassten lagerung des menschlichen koerpers
DE4435546A1 (de) * 1994-10-05 1996-04-11 Marion Schnitzler Vakuum-Matratze mit integrierter Halswirbel-Kopfstütze
US20100088825A1 (en) 2008-10-09 2010-04-15 Howell Charles A Fluidizable Bed with Supportive Filter Sheet

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2660999A (en) * 1951-05-16 1953-12-01 King N Thornton Spinal column aligning table
US2915057A (en) * 1956-03-01 1959-12-01 Edward R Ammon Physical conditioning machine
US2934063A (en) * 1958-03-18 1960-04-26 Elsasser Carl Combination back stretcher and massaging device
US2999496A (en) * 1958-09-30 1961-09-12 Parson Edward Le Roy Traction-percussion table
US3148391A (en) * 1961-11-24 1964-09-15 John K Whitney Support device
US3428973A (en) * 1966-03-17 1969-02-25 Thomas S Hargest Fluidized supporting apparatus
US3644950A (en) * 1969-08-01 1972-02-29 Milton Roy Co Patient support system
US3653083A (en) * 1970-05-11 1972-04-04 Roy Lapidus Bed pad

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB901080A (en) * 1961-05-05 1962-07-11 Henry Alfred Ernest Talley Improvements in or relating to pressure point pads for bed patients

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2660999A (en) * 1951-05-16 1953-12-01 King N Thornton Spinal column aligning table
US2915057A (en) * 1956-03-01 1959-12-01 Edward R Ammon Physical conditioning machine
US2934063A (en) * 1958-03-18 1960-04-26 Elsasser Carl Combination back stretcher and massaging device
US2999496A (en) * 1958-09-30 1961-09-12 Parson Edward Le Roy Traction-percussion table
US3148391A (en) * 1961-11-24 1964-09-15 John K Whitney Support device
US3428973A (en) * 1966-03-17 1969-02-25 Thomas S Hargest Fluidized supporting apparatus
US3644950A (en) * 1969-08-01 1972-02-29 Milton Roy Co Patient support system
US3653083A (en) * 1970-05-11 1972-04-04 Roy Lapidus Bed pad

Cited By (40)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4185341A (en) * 1976-11-08 1980-01-29 The Institute Of Orthopaedics Support appliance
JPS54128196A (en) * 1978-03-28 1979-10-04 Sapooto Shisutemuzu Intern Bed for hospital that use solid particle medium fluidized
US4483029A (en) * 1981-08-10 1984-11-20 Support Systems International, Inc. Fluidized supporting apparatus
US4541418A (en) * 1982-08-25 1985-09-17 J. A. Preston Corporation Simulated hydrotherapy bath
US4794659A (en) * 1984-12-19 1989-01-03 Fuji Electric Company Ltd. Fluid bed system
US4637083A (en) * 1985-03-13 1987-01-20 Support Systems International, Inc. Fluidized patient support apparatus
US4642825A (en) * 1985-07-08 1987-02-17 Fuji Electric Co., Ltd. Control apparatus for clinic bed
US4768250A (en) * 1985-07-30 1988-09-06 Fuji Electric Co., Ltd. Fluidized bead bed
US4686723A (en) * 1985-11-14 1987-08-18 The University Of Toronto Innovations Foundation Semi-fluidized bed
US4694520A (en) * 1986-01-15 1987-09-22 Ssi Medical Services, Inc. Patient support apparatus
EP0230148A3 (en) * 1986-01-15 1988-05-11 Ssi Medical Services, Inc. Improved patient support apparatus
US4835802A (en) * 1988-02-22 1989-06-06 The Kmw Group, Inc. Fluidization patient support control system
US5008965A (en) * 1988-07-11 1991-04-23 Kinetic Concepts, Inc. Fluidized bead bed
US4942635A (en) * 1988-12-20 1990-07-24 Ssi Medical Services, Inc. Dual mode patient support system
US4967431A (en) * 1988-12-20 1990-11-06 SSI Medical Servies, Inc. Fluidized bed with modular fluidizable portion
US4914760A (en) * 1988-12-20 1990-04-10 Ssi Medical Services, Inc. Fluidized bed with collapsible side
US5029352A (en) * 1988-12-20 1991-07-09 Ssi Medical Services, Inc. Dual support surface patient support
US5036559A (en) * 1988-12-20 1991-08-06 SSI Medical Sevices, Inc. Method of dual mode patient support
US5172781A (en) * 1989-10-27 1992-12-22 Kinetic Concepts, Inc. Scale for fluidized bed and method for using same
US5235713A (en) * 1990-11-06 1993-08-17 Bio Clinic Corporation Fluid filled flotation mattress
US5165141A (en) * 1991-01-11 1992-11-24 Ssi Medical Services, Inc. Spring loaded heavy duty caster system for supporting a fluidized patient support system
US5206896A (en) * 1991-12-13 1993-04-27 Hargest Thomas S Immobilization of domestic animals in a bed of fluidizable solid particles
US5441477A (en) * 1991-12-13 1995-08-15 Hargest; Thomas S. Method and apparatus for treating a patient by electro/fluidized bed therapy
US5447481A (en) * 1994-03-03 1995-09-05 Emter, Jr.; James Bench press exercise apparatus
US5539943A (en) * 1994-03-08 1996-07-30 Ssi Medical Services, Inc. Apparatus and method for percussion of fluidized support surface
US5649331A (en) * 1994-06-03 1997-07-22 Span-America Medical Systems, Inc. Self-adjusting pressure relief support system and methodology
US5787531A (en) * 1994-07-08 1998-08-04 Pepe; Michael Francis Inflatable pad or mattress
US5587933A (en) * 1994-07-19 1996-12-24 Bcam International, Inc. Support enhancing device and associated method
EP0772838A4 (en) * 1994-07-19 1998-08-26 Bcam Int Inc IMPROVED SUPPORT DEVICE AND RELATED METHOD
US6721979B1 (en) * 1995-04-25 2004-04-20 Kci Licensing, Inc. Air bed with fluidized bead surface and related methods
WO2000057830A1 (en) * 1999-03-29 2000-10-05 Kinetic Concepts, Inc. Fluidized bead bed with inflatable bead diffuser
US6308353B1 (en) * 1999-04-09 2001-10-30 The Or Group, Inc. Method and apparatus for positioning a patient
US9549865B2 (en) 2009-09-02 2017-01-24 Allen Medical Systems, Inc. Surgical positioning system
US10391014B2 (en) 2009-09-02 2019-08-27 Allen Medical Systems, Inc. Surgical positioning system
US20110099721A1 (en) * 2009-10-30 2011-05-05 Howell Charles A Weight efficient fluidized person-support apparatus
US20110138538A1 (en) * 2009-12-10 2011-06-16 Howell Charles A Weight efficient fluidized bed
US20140000039A1 (en) * 2012-06-27 2014-01-02 Frank Sauser Fluidizable Bed with Lateral Rotation Capability and Method of Operation Therefor
US9763842B2 (en) * 2012-06-27 2017-09-19 Hill-Rom Services, Inc. Fluidizable bed with lateral rotation capability and method of operation therefor
US9060908B2 (en) 2013-01-21 2015-06-23 Hill-Rom Services, Inc. Varying depth fluidized bed
US10238560B2 (en) 2013-03-13 2019-03-26 Hill-Rom Services, Inc. Air fluidized therapy bed having pulmonary therapy

Also Published As

Publication number Publication date
DE2440887C2 (de) 1984-07-26
FR2242074B1 (enrdf_load_stackoverflow) 1979-10-12
FR2242074A1 (enrdf_load_stackoverflow) 1975-03-28
DE2440887A1 (de) 1975-03-06
GB1458458A (en) 1976-12-15
BE835771Q (fr) 1976-03-16

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