EP0496841B1 - Equipement servant a inactiver une matrice en therapie par fluidification - Google Patents

Equipement servant a inactiver une matrice en therapie par fluidification Download PDF

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Publication number
EP0496841B1
EP0496841B1 EP91909550A EP91909550A EP0496841B1 EP 0496841 B1 EP0496841 B1 EP 0496841B1 EP 91909550 A EP91909550 A EP 91909550A EP 91909550 A EP91909550 A EP 91909550A EP 0496841 B1 EP0496841 B1 EP 0496841B1
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EP
European Patent Office
Prior art keywords
chamber
air
support basin
pressure
evaporator
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.)
Expired - Lifetime
Application number
EP91909550A
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German (de)
English (en)
Other versions
EP0496841A1 (fr
Inventor
Victor George Ryhiner
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.)
REDITAC BV
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REDITAC BV
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Publication date
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Application filed by REDITAC BV filed Critical REDITAC BV
Publication of EP0496841A1 publication Critical patent/EP0496841A1/fr
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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

  • the invention relates to a system for extracting moisture and fluid from one or more bodies, comprising a support basin accommodating moisture absorbing beads, a pressure chamber in air communication with the support basin, an air supply system for supplying air to the pressure chamber, and an evaporator chamber interconnected in the air supply path for extracting moisture from the supplied air.
  • the system known from EP-A-0332242 comprises a support basin, in which beads are accommodated.
  • a pressure is built up in a pressure chamber in communication with said support basin.
  • the pressure chamber is connected to an air supply system.
  • the moisture in the supplied air is removed by an evaporated chamber, in which an evaporator is arranged for lowering the temperature of the supplied air such that vapour droplets results.
  • the vapour droplets are collected in a cabinet part provided with a heating member for evaporating the vapour droplets. Then the evaporated droplets are removed into the ambient air.
  • This invention has the object to provide a system as mentioned above, by which the therapy is completely excessible to all parts of the world, thus also those with a high humidity degree and temperature. Consequently, it is necessary to reach a development, by which a continuous dehydration system will be present, so that under all climato-logical circumstances, a relative humidity degree of the floatation medium of less than 40% is reached.
  • the system is not being applied to therapeutical purposes only, but can also be used for industrial and/or agrarian products.
  • the principal aim, however, is to treat patients with severe tissue deformation in the gradation from excematic to gangrenous deformation, therapeutically and sterile, without the risk of contamination or cossinfection.
  • the above-mentioned aim is achieved in that the evaporator chamber is in communication with a depression chamber through a reference leak.
  • the optimum therapeutical depth by means of this system is reached at indication of burns 1-3 degrees, skin grafts and autografts, intensive and coronary care units, atrophy, geriatrics and many other applications, by which very vulnerable tissue is involved.
  • the system is based on the principle, by which the entering air, as well as the vapour tension coming from the absorbing microspheres, will extracted from moisture continuously. Owing to this, an air entrance will occur, which is ⁇ RH 40% at a temperature adjustable from 26°C (lower than the body temperature) to 38°C (higher than the body temperature), independent from the ambient temperature.
  • the viscosity is, also because of the low sg of the microspheres, 1.2 and brought in a fluidized state that could be compared with dry water with a RH ⁇ 40%.
  • the body in its shape will be covered almost completely by the microspheres, which will benefit the therapy, also because of the subcapillary pressure of ⁇ 8mm/HG and the bubbling effect of the fluidized mass.
  • the dissipated heat from the condensing unit will be utilized at the demand for heating of the flotation medium, so that a recirculation of the dissipated heat will hardly influence the ambient temperature.
  • all moisture which will be extracted from the surroundings as well as the contents of the equipment will be recirculated into the ambient, in this manner making the atmosphere where the patient is being treated, pleasant, as a result of a higher humidity. Also the ambient temperature will hardly increase.
  • the equipment of the invention could be devided into three main components:
  • the operation of the invention is based on the following principle: (see figure 1).
  • the ambient air will, after passing the dustfilter F1, pass the evaporator F2. Since the evaporator is brought to a temperature of 5°C, water-particles will be precipitated on the evaporator and will condensate.
  • the evaporator chamber F2 is connected with the vacuum chamber F3 by means of a reference leak.
  • the vacuum chamber F3 is connected to a vacuum pump or other venturi mechanism, in order to reach the desired underpressure. Causing an average vacuum pressure of 0,1mm/H2O, the boilingpoint of the water will be lowered and atomized again into the ambient.
  • the air from which the water-particles have been extracted will be carried to a twostage air compressor F4, where it will reach a pressure of 500mm/H2O under the fluidization compartment as installed in F5.
  • the hygrostat which has been installed will deactivate the condensing unit and evaporator, after the flotation material (microspheres) has reached the relative humidity degree of 35% (constant dehydration mode).
  • the fluidization pressure of 500mm/H2O is enough to "boil" the mass ( ⁇ 550 kg microspheres) in the basin F5, with a viscosity of 1.0-1.2.
  • basin F5 is adjustable in height from 65-85cm or from 80-100cm, measured from the floor surface, by means of an electric- or otherwise applied lifting system.
  • the therapeutical basin is equipped with a molecular polyethylene fluidization sheet with a surface permeability of 5-20 ⁇ and a pressure drop of 20.5mBar (see figure 2 drawing C).
  • a molecular polyethylene fluidization sheet with a surface permeability of 5-20 ⁇ and a pressure drop of 20.5mBar (see figure 2 drawing C).
  • an equal and smooth fluidization is only possible at an absolute horizontal installation of the unit (see figure 2 drawing B).
  • the fluidization will be equally shifted in a varied liquid and solid mass of the microspheres. With this not only an enclosure of the tissue as well as the body is reached, but a petrissage therapy will take effect, which will stimulate the circulation of the blood and reduce the pains, also as a result of the dehydration system.
  • the modulating rotation system of the basin is connected to the existing lifting system and can be adjusted in time values from 10-60 minutes by means of an electronic control.
  • the basin is held in a horizontal position of 90° (see figure 2 drawing B).
  • the carrying profile has been provided with a mechanical level adjustment (see figure 3 part A). With this is achieved that the fluidization pressure measured on each part of the body, will remain constant.
  • the pulse therapy is built in as standard equipment, in order to eliminate sliding forces and traction formation as much as possible.
  • the flotation material By reducing the fluidization pressure to the critical value of 250mm/H2O, the flotation material (microspheres) will remain air permeable and "mould" the body of the patient in a firm shape. By reducing the volume of the air compressor to 80M3 per hour, a reduction of the working pressure will be achieved. The temperature control as well as drain of moisture from the body will remain active. The electronic adjustment of the pulse therapy can be controlled in period intervals of 1-10 minutes passive and 1-10 seconds active.

Claims (12)

  1. Système pour extraire de l'humidité et un fluide d'un ou plusieurs corps, comprenant un bassin support (F5) contenant des billes absorbant l'humidité, une chambre de pression en communication pneumatique avec le bassin support, un ensemble d'alimentation (F1,F4) pour alimenter en air la chambre de pression et une chambre d'évaporation (F2) intégrée dans le passage d'air d'alimentation pour extraire l'humidité de l'air d'alimentation, caractérisé en ce que la chambre d'évaporation (F2) est en communication avec une chambre de dépression (F3) à travers un écoulement calibré.
  2. Système selon la revendication 1, caractérisé en ce que la chambre à dépression est reliée à une pompe à vide.
  3. Système selon la revendication 1, caractérisé en ce que la chambre à dépression est reliée à un mécanisme à venturi.
  4. Système selon l'une de revendications 1, 2 ou 3, dans lequel l'évaporateur de la chambre d'évaporation (F2) est contrôlé par une unité de condensation consistant en un compresseur (F8) et un condensateur (F9), et dans lequel le compresseur est contrôlé par un hygrostat disposé dans la chambre de pression.
  5. Système selon la revendication 4, dans lequel le condenseur est logé dans un boîtier relié à l'ensemble d'alimentation au moyen de conduits et d'une soupape à air (F7), interconnectés dans celui-ci.
  6. Système selon l'une des revendications précédentes dans lequel les billes sont des microsphères creuses, avec un diamètre de préférence supérieur à 100 µ et une masse volumique unitaire en g/cm3 comparable à une densité apparente inférieure à 2,2 en mode passif (hors fluidification).
  7. Système selon l'une des revendications 1 à 5, caractérisé en ce que les billes ne sont pas solides, pour acquérir une masse volumique unitaire plus faible, comparable à une valeur de densité apparente atteignant 1-1,2 g/cm3 en mode actif (fluidification).
  8. Système selon l'une des revendications précédentes, dans lequel le bassin support, du corps duquel l'humidité doit être extraite, est couvert par une feuille perméable, et est pourvu d'un système élévateur électrique ou autre, dans le but de faire varier son niveau par rapport au sol de 65 à 85 cm ou de 80 à 100 cm.
  9. Système selon l'une des revendications précédentes dans lequel l'application n'est pas limitée à des traitements médicaux et thérapeutiques, mais étendue à des lits à usage domestique.
  10. Système selon l'une des revendications précédentes dans lequel le bassin support peut être incliné d'un angle de 4° par rapport à l'horizontal, dans le but d'obtenir un entourage intermittent du corps et des tissus.
  11. Système selon l'une des revendications précédentes dans lequel la pression de fluidification dans le bassin support peut être réduite à travers un multivibrateur électronique asynchrone inclu dans l'ensemble d'alimentation d'air (F1,F4) (contrôleur à microprocesseur) pour éliminer les forces de glissement et pour mobiliser le patient (mode thérapeutique).
  12. Système selon l'une des revendications précédentes, dans lequel le profil porteur du bassin support a été équipé d'un ajustement de niveau mécanique, dans le but de maintenir la pression de fluidification douce sur le corps du patient de façon aussi constante que possible.
EP91909550A 1990-05-28 1991-05-07 Equipement servant a inactiver une matrice en therapie par fluidification Expired - Lifetime EP0496841B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
NL9001211 1990-05-28
NL9001211A NL9001211A (nl) 1990-05-28 1990-05-28 Uitrusting voor het inactiveren van voedingsbodems bij de fluidisatie therapie.
PCT/NL1991/000078 WO1991018578A1 (fr) 1990-05-28 1991-05-07 Equipement servant a inactiver une matrice en therapie par fluidification

Publications (2)

Publication Number Publication Date
EP0496841A1 EP0496841A1 (fr) 1992-08-05
EP0496841B1 true EP0496841B1 (fr) 1997-12-29

Family

ID=19857152

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91909550A Expired - Lifetime EP0496841B1 (fr) 1990-05-28 1991-05-07 Equipement servant a inactiver une matrice en therapie par fluidification

Country Status (6)

Country Link
EP (1) EP0496841B1 (fr)
AT (1) ATE161415T1 (fr)
DE (1) DE69128523T2 (fr)
ES (1) ES2110439T3 (fr)
NL (1) NL9001211A (fr)
WO (1) WO1991018578A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5402542A (en) * 1993-04-22 1995-04-04 Ssi Medical Services, Inc. Fluidized patient support with improved temperature control
US6073289A (en) * 1997-12-18 2000-06-13 Hill-Rom, Inc. Air fluidized bed
US6158070A (en) * 1999-08-27 2000-12-12 Hill-Rom, Inc. Coverlet for an air bed
US9763842B2 (en) * 2012-06-27 2017-09-19 Hill-Rom Services, Inc. Fluidizable bed with lateral rotation capability and method of operation therefor

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3428973A (en) * 1966-03-17 1969-02-25 Thomas S Hargest Fluidized supporting apparatus
CH449848A (fr) * 1967-05-09 1968-01-15 J Werding Winfried Lit oscillant automatique
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
JPS61290953A (ja) * 1985-06-19 1986-12-20 富士電機株式会社 身体支持具
US4768250A (en) * 1985-07-30 1988-09-06 Fuji Electric Co., Ltd. Fluidized bead bed
NL8800792A (nl) * 1988-03-29 1989-10-16 Redactron Bv Werkwijze en inrichting voor het onttrekken van vocht aan een of meer lichamen.

Also Published As

Publication number Publication date
ES2110439T3 (es) 1998-02-16
DE69128523T2 (de) 1998-04-16
EP0496841A1 (fr) 1992-08-05
NL9001211A (nl) 1991-12-16
WO1991018578A1 (fr) 1991-12-12
ATE161415T1 (de) 1998-01-15
DE69128523D1 (de) 1998-02-05

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