US20070235036A1 - Patient support - Google Patents

Patient support Download PDF

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Publication number
US20070235036A1
US20070235036A1 US11/120,080 US12008005A US2007235036A1 US 20070235036 A1 US20070235036 A1 US 20070235036A1 US 12008005 A US12008005 A US 12008005A US 2007235036 A1 US2007235036 A1 US 2007235036A1
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US
United States
Prior art keywords
patient support
base
support
bladders
bladder
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.)
Abandoned
Application number
US11/120,080
Other languages
English (en)
Inventor
John Bobey
James Balaton
Gregory Branson
Colin Clarke
Rachel King
David Lokhorst
Eric Meyer
Jonathan Mueller
Todd O'Neal
Robert Petrosenko
Stephen Schulte
Andrew Skinner
Michael Sleva
Sohrab Soltani
Richard Stacy
Daniel Stevens
Mayur Yermaneni
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.)
Tactex Controls Inc
Hill Rom Services Inc
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to US11/120,080 priority Critical patent/US20070235036A1/en
Priority to US11/324,520 priority patent/US7698765B2/en
Publication of US20070235036A1 publication Critical patent/US20070235036A1/en
Assigned to TACTEX CONTROLS, INC. reassignment TACTEX CONTROLS, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LOKHORST, DAVID M.
Assigned to TACTEX CONTROLS, INC. reassignment TACTEX CONTROLS, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CLARKE, COLIN
Assigned to HILL-ROM SERVICES, INC. reassignment HILL-ROM SERVICES, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: TACTEX CONTROLS, INC.
Assigned to HILL-ROM SERVICES, INC. reassignment HILL-ROM SERVICES, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SOLTANI, SOHRAB, STEVENS, DANIEL K., PETROSENKO, ROBERT, SLEVA, MICHAEL Z., BOBEY, JOHN A., MUELLER, JONATHAN H., STACY, RICHARD B., MEYER, ERIC R., SKINNER, ANDREW F., YERMANENI, MAYUR, BRANSON, GREGORY W., KING, RACHEL HOPKINS, O'NEAL, TODD P., SCHULTE, STEPHEN R.
Priority to US12/644,178 priority patent/US8146191B2/en
Abandoned 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
    • A61G7/05715—Arrangements for preventing bed-sores or for supporting patients with burns, e.g. mattresses specially adapted therefor with modular blocks, or inserts, with layers of different material
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/103—Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
    • A61B5/11—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb
    • A61B5/1113—Local tracking of patients, e.g. in a hospital or private home
    • A61B5/1115—Monitoring leaving of a patient support, e.g. a bed or a wheelchair
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/103—Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
    • A61B5/11—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb
    • A61B5/1118—Determining activity level
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
    • A61B5/6887—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient mounted on external non-worn devices, e.g. non-medical devices
    • 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
    • A61G7/001—Beds specially adapted for nursing; Devices for lifting patients or disabled persons with means for turning-over the patient
    • 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
    • A61G7/05761—Arrangements for preventing bed-sores or for supporting patients with burns, e.g. mattresses specially adapted therefor where patient is supported on a free, unbounded, film or cushion of air
    • 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
    • A61G7/05769—Arrangements for preventing bed-sores or for supporting patients with burns, e.g. mattresses specially adapted therefor with inflatable chambers
    • 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
    • A61G7/05769—Arrangements for preventing bed-sores or for supporting patients with burns, e.g. mattresses specially adapted therefor with inflatable chambers
    • A61G7/05776—Arrangements for preventing bed-sores or for supporting patients with burns, e.g. mattresses specially adapted therefor with inflatable chambers with at least two groups of alternately inflated chambers
    • 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
    • A61G7/05784—Arrangements for preventing bed-sores or for supporting patients with burns, e.g. mattresses specially adapted therefor with ventilating means, e.g. mattress or cushion with ventilating holes or ventilators
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B2562/00—Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
    • A61B2562/02—Details of sensors specially adapted for in-vivo measurements
    • A61B2562/0247—Pressure sensors
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B2562/00—Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
    • A61B2562/04—Arrangements of multiple sensors of the same type
    • A61B2562/046—Arrangements of multiple sensors of the same type in a matrix array
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
    • A61B5/6887—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient mounted on external non-worn devices, e.g. non-medical devices
    • A61B5/6891—Furniture
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
    • A61B5/6887—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient mounted on external non-worn devices, e.g. non-medical devices
    • A61B5/6892—Mats
    • 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
    • A61G2203/00—General characteristics of devices
    • A61G2203/30—General characteristics of devices characterised by sensor means
    • A61G2203/32—General characteristics of devices characterised by sensor means for force
    • 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
    • A61G2203/00—General characteristics of devices
    • A61G2203/30—General characteristics of devices characterised by sensor means
    • A61G2203/34—General characteristics of devices characterised by sensor means for pressure
    • 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
    • A61G2203/00—General characteristics of devices
    • A61G2203/30—General characteristics of devices characterised by sensor means
    • A61G2203/42—General characteristics of devices characterised by sensor means for inclination
    • 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
    • A61G2210/00—Devices for specific treatment or diagnosis
    • A61G2210/70—Devices for specific treatment or diagnosis for cooling
    • 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
    • A61G2210/00—Devices for specific treatment or diagnosis
    • A61G2210/90—Devices for specific treatment or diagnosis for heating

Definitions

  • the present disclosure relates to a device for supporting a patient, such as a mattress.
  • the present disclosure relates to patient supports appropriate for use in hospitals, acute care facilities, and other patient care environments.
  • Certain embodiments disclosed herein relate to pressure relief support surfaces, or patient support surfaces that are configured to accommodate and operate with a variety of sizes and styles of beds, bed frames, and patient types.
  • a patient support in one illustrated embodiment of the present invention, has a cover defining an interior region.
  • a base is positioned in the interior region.
  • Inflatable bladders extend upwardly from the base along a vertical axis. The vertical axis is substantially perpendicular to the base.
  • Pressure sensors may be positioned underneath the base.
  • the pressure sensors may be arranged so that each sensor is aligned with at least one of the vertical bladders.
  • the pressure sensors may be enclosed within an enclosure.
  • the enclosure may be located in the interior region of the cover.
  • the pressure sensors may include one or more light transmitters or conductors or optical fibers.
  • the pressure sensors may operate to measure pressure applied to one or more of the bladders.
  • One or more of the pressure sensors may evaluate changes in intensity of light energy diffused within the sensor.
  • One or more pressure transducers may be coupled to the inflatable bladders.
  • the pressure transducers may operate to measure internal pressure of fluid within the bladders.
  • a support layer may be positioned above the inflatable bladders.
  • the support layer may have at least one support characteristic that is different from a support characteristic of the inflatable bladders.
  • the support layer may include a breathable or air-permeable material.
  • the support layer may include resilient portions.
  • the support layer may include projections and depressions.
  • the support layer may be enclosed within an enclosure. The enclosure may be located in the interior region of the cover.
  • the inflatable bladders may be substantially can-shaped or cylindrical.
  • One or more of the inflatable bladders may include a beveled portion located between a top portion and a vertical portion of the bladder.
  • the patient support may include one or more removable filler portions.
  • the filler portions may be selected to conform the patient support to bed frames having one or more deck configurations, including flat deck and step or recessed deck configurations.
  • FIG. 1 is a perspective view of a patient support positioned on an exemplary hospital bed, with a portion of the patient support being cut away to show interior components of the patient support;
  • FIG. 2 is a perspective view of a patient support, with a portion being cut away to show interior components of the patient support;
  • FIG. 3 is an exploded view of components of the illustrated embodiment of a patient support
  • FIG. 4 is a schematic view of an exemplary three-dimensional support material
  • FIG. 5 is a side view of selected components of the illustrated embodiment of a patient support
  • FIG. 6 is a top view of components of a patient support also shown in FIG. 5 ;
  • FIG. 7 is a perspective view of a first bladder assembly for a patient support
  • FIG. 8 is a side view of the bladder assembly of FIG. 7 ;
  • FIG. 9 is a top schematic view of the bladder assembly of FIG. 7 ;
  • FIG. 10 is a close-up schematic view of Area A of FIG. 9 ;
  • FIG. 11 is a close-up schematic view of Area B of FIG. 9 ;
  • FIG. 12A is a top view of a portion of a bladder assembly including a vertical bladder and an inlet tube;
  • FIG. 12B is a cross-sectional view taken along line B-B of FIG. 12A ;
  • FIG. 12C is a cross-sectional view taken along line C-C of FIG. 9 ;
  • FIG. 13 is a cross-sectional view of a portion of a base and vertical bladder
  • FIG. 14 is a perspective view of a second bladder assembly for a patient support
  • FIG. 15 is a top schematic view of the bladder assembly of FIG. 14 ;
  • FIG. 16 is a perspective view of a third bladder assembly for a patient support
  • FIG. 17 is another perspective view of the bladder assembly of FIG. 16 ;
  • FIG. 18 is a side view of the bladder assembly of FIG. 16 ;
  • FIG. 19 is a top schematic view of the bladder assembly of FIG. 16 ;
  • FIG. 20 is a top view of exemplary sensor pads
  • FIG. 21 is a perspective view of an exemplary sensor pad showing interior components thereof
  • FIG. 22 is a perspective view of an exemplary bolster assembly
  • FIG. 23 is a schematic view of air zones of the illustrated patient support and associated air supply system
  • FIGS. 24A and 24B are schematic diagrams of portions of a control system for the illustrated patient support
  • FIG. 25 is an exploded view of an exemplary pneumatic assembly.
  • FIG. 26 is a perspective view of the pneumatic assembly of FIG. 25 .
  • FIG. 1 shows an embodiment of a patient support or mattress 10 in accordance with the present invention.
  • Patient support 10 is positioned on an exemplary bed 2 .
  • Bed 2 is a hospital bed including a frame 4 , a headboard 36 , a footboard 38 , and a plurality of siderails 40 .
  • Frame 4 of the exemplary bed 2 generally includes a deck 6 supported by a base 8 .
  • Deck 6 includes one or more deck sections (not shown), some or all of which may be articulating sections, i.e., pivotable with respect to base 8 .
  • patient support 10 is configured to be supported by deck 6 .
  • Patient support 10 has an associated control unit 42 , which controls inflation and deflation of certain internal components of patient support 10 , among other things.
  • Control unit 42 includes a user interface 44 , which enables caregivers, service technicians, and/or service providers to configure patient support 10 according to the needs of a particular patient. For example, support characteristics of patient support 10 may be adjusted according to the size, weight, position, or activity level of the patient.
  • User interface 44 is password-protected or otherwise designed to prevent access by unauthorized persons.
  • User interface 44 also enables patient support 10 to be adapted to different bed configurations.
  • deck 6 may be a flat deck or a step or recessed deck.
  • a caregiver may select the appropriate deck configuration via user interface 44 .
  • Inflation or deflation of specific mattress components may occur in response to user selection of a hospital bed frame or deck configuration.
  • patient support 10 has a head end 32 generally configured to support a patient's head and/or upper body region, and a foot end 34 generally configured to support a patient's feet and/or lower body region.
  • Patient support 10 includes a cover 12 which defines an interior region 14 .
  • interior region 14 includes a first layer 20 , a second layer 50 , and a third layer 52 .
  • first layer 20 a first layer 20
  • second layer 50 a second layer 50
  • third layer 52 a third layer 52 .
  • other embodiments of the present invention may not include all three of these layers, or may include additional layers, without departing from the scope of the present invention.
  • first layer 20 includes a support material
  • second layer 50 includes a plurality of vertically-oriented inflatable bladders located underneath the first layer 20
  • third layer 52 includes a plurality of pressure sensors located underneath the vertical bladders of second layer 50 , as more particularly described below.
  • interior region 14 Also located within interior region 14 are a plurality of bolsters 54 , one or more filler portions 56 , and a pneumatic valve control box 58 .
  • a fire-resistant material (not shown) may also be included in the interior region 14 .
  • Patient support 10 may be coupled to deck 6 by one or more couplers 46 .
  • couplers 46 are conventional woven or knit or fabric straps including a D-ring or hook and loop assembly or Velcro®-brand strip or similar fastener. It will be understood by those skilled in the art that other suitable couplers, such as buttons, snaps, or tethers may also be used equally as well.
  • FIG. 3 Components of one embodiment of a patient support in accordance with the present invention are shown in exploded view in FIG. 3 .
  • This embodiment of patient support 10 includes a top cover portion 16 and a bottom cover portion 18 .
  • Top cover portion 16 and bottom cover portion 18 couple together by conventional means (such as zipper, Velcro® strips, snaps, buttons, or other suitable fastener) to form cover 12 , which defines interior region 14 . While a plurality of layers and/or components are illustrated within interior region 14 , it will be understood by those of skill in the art that the present invention does not necessarily require all of the illustrated components to be present.
  • a first support layer 20 is located below top cover portion 16 in interior region 14 .
  • First support layer 20 includes one or more materials, structures, or fabrics suitable for supporting a patient, such as foam, inflatable bladders, or three-dimensional material. Suitable three-dimensional materials include Spacenet, Tytex, and/or similar materials. One embodiment of a suitable three dimensional material for support layer 20 is shown in FIG. 4 , described below.
  • a second support layer 50 including one or more inflatable bladder assemblies is located underneath the first support layer 20 .
  • the illustrated embodiment of the second support layer 50 includes first, second and third bladder assemblies, namely, a head section bladder assembly 60 , a seat section bladder assembly 62 , and a foot section bladder assembly 64 .
  • first, second and third bladder assemblies namely, a head section bladder assembly 60 , a seat section bladder assembly 62 , and a foot section bladder assembly 64 .
  • other embodiments include only one bladder assembly extending from head end 32 to foot end 34 , or other arrangements of multiple bladder assemblies, for example, including an additional thigh section bladder assembly.
  • the illustrated bladder assemblies 60 , 62 , 64 and their components are described below with reference to FIGS. 5-19 .
  • bladder assemblies disclosed herein are formed from a lightweight, flexible air-impermeable material such as a polymeric material like polyurethane, urethane-coated fabric, vinyl, or rubber.
  • a pressure-sensing layer 69 illustratively including first and second sensor pads, namely a head sensor pad 68 and a seat sensor pad 70 , is positioned underneath bladder assemblies 60 , 62 , 64 .
  • Head sensor pad 68 is generally aligned underneath head section bladder assembly 60
  • seat sensor pad 70 is generally aligned underneath seat section bladder assembly 62 , as shown.
  • Head filler 66 may be positioned adjacent head sensor pad 68 near head end 32 so as to properly position head sensor pad 68 underneath the region of patient support 10 most likely to support the head or upper body section of the patient.
  • a single sensor pad or additional sensor pads for example, located underneath foot section bladder assembly 64 , and/or different alignments of the sensor pads, are provided.
  • Sensor pads 68 , 70 are described below with reference to FIGS. 20-21 .
  • a turn-assist cushion or turning bladder or rotational bladder 74 is located below sensor pads 68 , 70 .
  • the exemplary turn-assist cushion 74 shown in FIG. 3 includes a pair of inflatable bladders 74 a , 74 b .
  • Another suitable rotational bladder 74 is a bellows-shaped bladder.
  • Another suitable turn-assist cushion is disclosed in, for example, U.S. Pat. No. 6,499,167 to Ellis, et al., which patent is owned by the assignee of the present invention and incorporated herein by this reference.
  • Turn-assist cushions 74 are not necessarily a required element of the present invention.
  • a plurality of other support components 66 , 72 , 76 , 78 , 80 , 84 , 86 , 90 are also provided in the embodiment of FIG. 3 .
  • One or more of these support components are provided to enable patient support 10 to be used in connection with a variety of different bed frames, in particular, a variety of bed frames having different deck configurations.
  • One or more of these support components may be selectively inflated or deflated or added to or removed from patient support 10 in order to conform patient support 10 to a particular deck configuration, such as a step or recessed deck or a flat deck.
  • the support components illustrated in FIG. 3 are made of foam, inflatable bladders, three-dimensional material, other suitable support material, or a combination of these.
  • head filler 66 includes a plurality of foam ribs extending transversely across patient support 10 . Head filler 66 could also be an inflatable bladder.
  • Head bolster assembly 76 seat bolster assembly 78 , and foot section bolster assembly 86 each include longitudinally-oriented inflatable bladders spaced apart by coupler plates 144 .
  • Bolster assemblies 76 , 78 , 86 are described below with reference to FIG. 22 .
  • first foot filler portion 80 includes a plurality of inflatable bladders extending transversely across patient support 10
  • second foot filler portion 84 includes a foam member, illustratively with portions cut out to allow for retractability of the foot section or for other reasons.
  • Deck filler portion 90 includes a plurality of transversely-extending inflatable bladders. As illustrated, deck filler portion 90 includes two bladder sections located beneath the head and seat sections of the mattress, respectively, and is located outside of cover 12 . Deck filler portion 90 may include one or more bladder regions, or may be located within interior region 14 , without departing from the scope of the present invention.
  • a pneumatic valve box 58 and an air supply tube assembly 82 are also provided in the illustrated embodiment.
  • Receptacle 88 is sized to house pneumatic valve box 58 .
  • receptacle 88 is coupled to bottom cover portion 18 by Velcro® strips.
  • Pneumatic box 58 and tube assembly 82 are described below with reference to FIG. 6 , FIG. 23 , and FIGS. 25-26 .
  • support layer 20 includes a breathable or air permeable material which provides cushioning or support for a patient positioned thereon and allows for circulation of air underneath a patient.
  • the circulated air may be at ambient temperature, or may be cooled or warmed in order to achieve desired therapeutic effects.
  • support layer 20 includes or is enclosed in a low friction air permeable material (such as spandex, nylon, or similar material) enclosure that allows support layer 20 to move with movement of a patient on patient support 10 , in order to reduce shear forces, for instance.
  • a low friction air permeable material such as spandex, nylon, or similar material
  • the enclosure is made of a non-air permeable, moisture/vapor permeable material such as Teflon or urethane-coated fabric.
  • FIG. 4 an exemplary three-dimensional material suitable for use in support layer 20 is depicted.
  • This illustrated embodiment of support layer 20 includes a plurality of alternating first and second layers 27 , 29 .
  • Each layer 27 , 29 includes first and second sublayers 28 , 30 .
  • the sublayers 28 , 30 are positioned back-to-back and each sublayer 28 , 30 includes a plurality of peaks or semicircular, cone, or dome-shaped projections 22 and troughs or depressions 24 .
  • a separator material 26 is provided between the first and second sublayers 28 , 30 . In other embodiments, separator material 26 may instead or in addition be provided between the layers 27 , 29 , or not at all.
  • any number of layers and sublayers may be provided as may be desirable in a particular embodiment of support layer 20 . Certain embodiments include 4 layers and other embodiments include 8 layers. In general, 0 - 20 layers of three dimensional material are included in support layer 20 .
  • Suitable three-dimensional materials for use in support layer 20 include a polyester weave such as Spacenet, manufactured by Freudenberg & Co. of Weinheim, Germany, Tytex, available from Tytex, Inc. of Rhode Island, U.S.A., and other woven, nonwoven, or knit breathable support materials or fabrics having resilient portions, microfilaments, monofilaments, or thermoplastic fibers.
  • Other embodiments of support layers and suitable three dimensional materials are described in U.S. patent application Ser. No. ______, entitled PRESSURE RELIEF SUPPORT SURFACE (Attorney Docket No. 8266-1220), filed on the same date herewith, and assigned to the assignee of the present invention, the disclosure of which is incorporated herein by this reference.
  • An exemplary second support layer including a base 96 and a plurality of inflatable bladders 50 is shown in the side view of FIG. 5 .
  • Inflatable bladders 50 extend upwardly away from base 96 along a vertical axis 101 .
  • Inflatable bladders 50 are arranged into a plurality of bladder zones, namely head bladder zone 60 , seat bladder zone 62 , and foot bladder zone 64 .
  • First and second foot filler portions 80 , 84 and tube assembly 82 are located in the foot end 34 of patient support 10 below foot bladder assembly 64 .
  • Pneumatic valve box 58 is also located in foot end 34 of patient support 10 underneath foot bladder zone 64 . In other embodiments, pneumatic box 58 may be located elsewhere in patient support 10 or outside patient support 10 .
  • FIG. 6 a top view of the above-described embodiment of patient support 10 is provided, with cover 12 , support layer 20 , and foot bladder assembly 64 removed to show the arrangement of delivery tube 92 , air distributor 94 , and pneumatic box 58 in the foot section 34 .
  • Pneumatic box 58 includes valves, circuitry, and other components for connecting vertical bladders 50 to an air supply 152 ( FIG. 23 ) for inflation and deflation of vertical bladders 50 .
  • Pneumatic box 58 is described below with reference to FIGS. 25 and 26 .
  • Delivery tube 92 is connected to an air supply and provides air to air distributor 94 .
  • delivery tube extends transversely and/or diagonally across the width of patient support 10 and may, be curved or angled toward seat section bladder zone 62 .
  • Tube 92 and distributor 94 are made of a lightweight air impermeable material such as plastic.
  • Air distributor 94 is coupled to an end of delivery tube 92 located near seat section bladder zone 62 .
  • Air distributor 94 is an elongated hollow member including one or more apertures 93 which allow air to exit the tube 92 and circulate among vertical bladders 50 and three-dimensional material 20 .
  • the air is directed upwardly through support layer 20 .
  • a vent (not shown) is provided in cover 12 to allow the circulated air to exit interior region 14 .
  • the vent is generally located on the opposite end of patient support 10 from the supply tube 92 .
  • An additional vent may be provided in the three-dimensional material enclosure, in embodiments where three-dimensional material 20 is enclosed in an enclosure within interior region 14 as discussed above. In those embodiments, the vent is also generally be located opposite the supply tube 92 .
  • cover 12 may include a breathable or air permeable material allowing for air to flow upwardly through the cover 12 to the patient.
  • a single supply tube is provided in place of delivery tube 92 and air distributor 94 . While shown in the illustrated embodiment, the above-described air circulating feature is not necessarily a required component of the present invention.
  • FIG. 7 illustrates a head section bladder assembly 60 .
  • Head section bladder assembly 60 includes a base or substrate 96 and a plurality of vertically-oriented inflatable bladders 50 extending upwardly from the base 96 along an axis 101 which is substantially perpendicular to base 96 .
  • Head section bladder assembly 60 has a head end 32 , a foot end 34 , a first side 33 and a second side 35 .
  • Vertical bladders 50 are arranged in longitudinally-extending columns from head end 32 to foot end 34 , and in transversely extending rows from first side 33 to second side 35 .
  • Each bladder 50 is coupled to base 96 by a coupling 104 .
  • radio frequency (RF) welding is used to couple bladders 50 to base 96 .
  • other conventional coupling means such as adhesives or sealants, may be used.
  • Base 96 includes an upper base portion or substrate 97 and a lower base portion or substrate 95 as best shown in FIGS. 12B, 12C and 13 .
  • Air channels 212 (best shown in FIG. 12 B) are formed between upper base portion 97 and lower base portion 95 and provide air to bladders 50 from an air supply ( FIG. 24B ).
  • Air release channels 206 are coupled to air channels 212 as shown in FIG. 12B .
  • Elbow ports 110 and fittings 114 are coupled to air release channels 206 and to relief valves 112 as shown in FIG. 16 .
  • One suitable fitting 114 is a 1 ⁇ 2 inch by 3 ⁇ 8 inch barbed connector, model no. C8-6WN made of nylon, available from Eldon James Corp. of Loveland, Colo.
  • Pressure relief valves 112 release air to the atmosphere, for example, if the internal air pressure within the bladders 50 exceeds a maximum value.
  • One suitable relief valve 112 is a 2.0 psi pressure relief valve model no. 730ROA available from Halkey-Roberts of St. Russia, Fla. In the illustrated embodiment, relief valves 112 are inserted into tubing such as 1 ⁇ 2-inch clear PVC tubing.
  • upper base portion 97 is coupled to lower base portion 95 by welds 104 , forming a plenum.
  • Fasteners, 106 , 108 , 109 are generally spaced apart along the outer edges of base 96 .
  • Fasteners 106 , 108 , 109 secure the bladder assembly 60 within interior region 14 , i.e. by coupling bladder assembly 60 to another bladder assembly, or to an inner portion of cover 12 , or to stiffener plates 144 , or to another component within interior region 14 .
  • fasteners 106 couple the bladder assembly 60 to the sensor pad 68
  • fasteners 108 couple bladder assembly 60 to support plate 144
  • fasteners 109 couple bladder assembly 60 to bladder assembly 62 .
  • Fasteners 106 , 108 , 109 are, in the illustrated embodiment, plastic or metal buttons and snaps. However, other suitable fasteners, such as rivets, may also be used.
  • Elbow ports 110 are spaced apart and located along the edges of first and second sides 33 , 35 of bladder assembly 60 .
  • 3 ⁇ 8-inch ports 110 are provided on each side of bladder assembly 60 and at least one port is provided for each of head section assembly 60 , seat section assembly 62 , and foot section assembly 64 .
  • Semi-circular regions 103 facilitate coupling of head section bladder assembly 60 with another bladder assembly, among other things.
  • semi-circular regions 103 are sized to mate with vertical bladder portions of another bladder assembly, such as seat section bladder assembly 62 .
  • FIG. 8 is a side view of bladders 50 of head section bladder assembly 60 .
  • Bladders 50 each have a vertical portion 100 , a top portion 98 , and an angled or beveled portion 102 located in between the top portion 98 and the vertical portion 100 .
  • Each bladder 50 is coupled to base 96 .
  • Bladders 50 have a vertical height 116 .
  • vertical height 116 of bladders in the head section bladder assembly 60 is about 4 to about 6 inches.
  • vertical height 116 is about 4.9 inches and the height including plenum 95 , 97 is about 6 inches.
  • FIG. 9 shows the pattern of couplings 104 (i.e., RF welds) used in the head section bladder assembly 60 of the illustrated embodiment of the present invention.
  • Radio frequency welds 104 are provided around the circumference of each bladder 50 , intermittently between the bladders 50 on the base 96 , and along the outer edges of the bladder assembly.
  • Welds 194 around the circumference of each bladder 50 couple coupling portion 99 of bladder 50 to upper base portion 97 as best shown in FIGS. 10, 11 , 12 B and 12 C.
  • Welds 196 , 198 couple upper base portion 97 to lower base portion 95 as best shown in FIGS. 10, 11 , and 12 B.
  • Dielectric welds 105 are used to join elbow ports 110 to upper base portion 95 as best shown in FIGS. 11 and 12 B.
  • FIG. 10 is a close-up view of Area A of FIG. 9 , showing outer edge welds 192 , bladder welds 194 , first circular welds 196 , and second circular welds 198 .
  • the welds 198 have an outer diameter 197 of about 4 inches and a thickness of about 0.125 inches; welds 196 , 198 have an outer diameter of about 0.75 inches and a thickness of about 0.125 inches; and welds 192 have a thickness of about 0.125 inches.
  • Other suitable weld configurations may be used without departing from the scope of the present invention.
  • circular welds 196 , 198 may encircle fasteners 106 , 108 .
  • FIG. 11 additionally shows a weld 200 encircling an elbow port 110 , which, as mentioned above, is done by dielectric welding.
  • FIG. 12A illustrates a portion of bladder assembly 60 including a weld 196 , a bladder 50 , and an elbow port 110 .
  • bladder 50 includes a top portion 98 and a beveled portion 102 .
  • Bladder 50 is substantially cone-or can-shaped or cylindrical in shape. However, in other embodiments, bladder 50 is square or cube-shaped, rectangular, hexagonal, octagonal, or any other suitable shape as will be understood by those of ordinary skill in the art.
  • Welds 196 , 194 , and 200 are generally circular in shape. In the case of bladder weld 194 , weld 194 is positioned along the circumference of bladder 50 . In the case of weld 200 , weld 200 is positioned along the circumference of elbow port 110 .
  • FIG. 12B shows a cross sectional view of FIG. 12A taken along line 12 B- 12 B.
  • an air channel 212 supplies air from an air supply (not shown) to interior region 204 of bladder 50 . Some of the air provided by air channel 212 resides in release channel 206 . If the pressure in interior region 204 , 206 , 212 exceeds a maximum value, a pressure relief valve 112 coupled to channel 206 will release air to the atmosphere.
  • Air channel 212 is formed between upper base portion 97 and lower base portion 95 , which are coupled together at welds 196 .
  • Upper base portion 97 includes a plurality of cut-out regions or holes (not shown) into which material forming bladders 50 is inserted.
  • Each bladder 50 has an end portion 99 that is positioned between upper base portion 97 and lower base portion 95 as shown in FIGS. 12C and 13 .
  • End portion 99 is secured to upper base portion 97 by coupling or weld 194 .
  • release channel 206 includes an end portion 111 which is secured to upper base portion 97 by coupling or weld 200 .
  • bladder 50 is thermoformed and only welded where end portion 99 meets upper base portion 97 .
  • bladder 50 may be hand-crafted; i.e., top portion 98 is welded to vertical portion 100 and vertical portion 100 also includes a welded seam.
  • FIG. 13 depicts an exemplary fastener 106 , 108 suitable for coupling upper base portion 97 to lower base portion 95 , and or for coupling base 96 to another surface (such as bottom surface of cover 12 ) within interior region 14 .
  • each fastener 106 , 108 includes a first fastener portion or stud 208 and a second fastener portion or post 210 .
  • first fastener portion 208 is a button and second fastener portion 210 is a socket.
  • first and second fastener portions 208 , 210 are configured to mate with one another thereby coupling the intervening materials together.
  • FIG. 13 also illustrates air channel 212 located between upper and lower base portions 97 , 95 , vertical bladder wall 100 extending upwardly away from base 96 , bladder top portion 98 , and crown or bevel portion 102 located between top portion 98 and wall portion 100 , defining an interior bladder region 204 .
  • the diameter of each vertical bladder 100 is about 3.5′′. A smaller or larger diameter may be used in other embodiments.
  • FIGS. 14 and 15 depict an exemplary seat section bladder assembly 62 .
  • Seat section bladder assembly is generally configured to support a patient's seat, thighs, or midsection.
  • the components of seat section bladder assembly 62 are substantially as described above with reference to head section bladder assembly 60 .
  • Bladders 50 of seat section bladder assembly 62 have a vertical height 116 .
  • vertical height 116 is the same or about the same as vertical height 116 of the bladders in head section assembly 60 .
  • FIGS. 16-19 depict an exemplary foot section bladder assembly 64 .
  • Foot section bladder assembly 64 is generally configured to support a patient's legs and/or feet. The components of foot section bladder assembly 64 are substantially as described above with reference to head section bladder assembly 60 .
  • Bladders 50 of foot section bladder assembly have a vertical height 118 as shown in FIG. 18 . In the illustrated embodiment, vertical height 118 is shorter or smaller than vertical height 116 . In certain embodiments, vertical height 118 is about 2 to about 5 inches. In one embodiment, vertical height is about 3.5 inches and the height including plenum 95 , 97 is about 4 inches.
  • foot section bladder assembly 64 is wider than head and seat section bladder assemblies 60 , 62 .
  • foot section bladder assembly 64 includes longitudinal sections 214 , 216 , which may function as bolsters for the foot section. Longitudinal sections 214 , 216 are separately inflatable from the remainder of the foot section 64 , in the illustrated embodiment.
  • patient support 10 includes a pressure sensing member 67 located underneath the bladder assemblies 60 , 62 , 64 .
  • pressure sensing member 67 includes a first or head section sensor pad 68 and a second or seat section sensor pad 70 .
  • each sensor pad 68 , 70 includes first and second sensor pad portions 124 , 126 .
  • Each sensor pad portion 124 , 126 includes a plurality of pressure sensors 136 located on a substrate 220 . Sensors 136 are designed to respond when pressure is applied to the top surface of patient support 10 , i.e. by a patient.
  • Sensors 136 are spaced apart and arranged on substrate 220 so that they are positioned adjacent or underneath or aligned with one or more vertical bladders 50 .
  • a sensor 136 is positioned underneath the center or middle portion of each vertical bladder 50 .
  • Substrate 220 is made of a substantially rigid material such as plastic.
  • An additional interface layer may be provided between base 96 and substrate 220 to direct applied force to sensors 136 , or for other reasons.
  • Sensors 136 include a soft or flexible material such as foam and one or more light conductors or optical fibers (not shown) located within the foam.
  • Sensors 136 and substrate 137 are enclosed within a cover 22 as shown in FIG. 21 .
  • the sensors 136 in each sensor pad 68 , 70 are coupled to a collector/transmitter 128 , 130 , which receives pressure data from sensors 136 and transmits the data to a circuit located in pneumatic box 58 by communication lines 132 .
  • a collector/transmitter 128 , 130 is located at one end of each sensor pad portion 124 , 126 .
  • the pressure data obtained by sensors 136 is indicative of an amount of pressure being applied (i.e., by a patient or portion thereof being supported by patient support 10 ) to one or more vertical bladders 50 .
  • the pressure sensing apparatus 67 and components and operation thereof are described in more detail in U.S. patent application Ser. No. ______, titled PATIENT SUPPORT HAVING REAL TIME PRESSURE CONTROL (Attorney Docket No. 8266-1287), filed on the same date herewith and assigned to the assignee of the present invention, which is incorporated herein by this reference.
  • FIG. 22 depicts a bolster assembly 76 , 78 .
  • Bolster assemblies 76 , 78 are generally configured to support portions of a patient along the longitudinal edges of patient support 10 .
  • One or more bolster assemblies 76 , 78 may be provided in order to conform patient support 10 to a particular bed frame configuration, to provide additional support along the edges of patient support 10 , aid in ingress or egress of a patient from patient support 10 , maintain a patient in the center region of patient support 10 , or for other reasons.
  • internal air pressure of the bolster bladders may be higher than the internal bladder pressure of assembles 60 , 62 , 64 , or may be increased or decreased in real time, to accomplish one of these or other objectives.
  • Each bolster assembly 76 , 78 includes a plurality of bolsters, namely, an upper bolster 140 and a lower bolster 142 , with the upper bolster 140 being positioned above the lower bolster 142 .
  • Each upper and lower bolster combination 140 , 142 is configured to be positioned along a longitudinal edge of patient support 10 .
  • Each upper and lower bolster combination 140 , 142 is enclosed in a cover 138 .
  • the bolsters 140 , 142 are inflatable bladders.
  • either or both bolsters 140 , 142 may be constructed of foam, or filled with three-dimensional material, fluid, or other suitable support material.
  • upper bolster 140 includes two layers of foam: a viscoelastic top layer and a non visco elastic bottom layer, while lower bolster 142 is an inflatable bladder.
  • the bolsters 140 , 142 may be inflated together, or separately, as shown in FIG. 23 , described below.
  • Each bolster combination 140 , 142 is coupled to one end of one or more support plates 144 which provide support for other components of patient support 10 including vertical bladders 50 .
  • Support plates 144 may be made of a substantially rigid or stiff yet lightweight material such as molded plastic. In other embodiments, plates 144 may be constructed of stainless steel or steel, if additional weight is desired, i.e. for addition, collapsibility for ease of storage of patient support 10 , for instance. Support plates 144 may be provided in order to give support to patient support 10 particularly during transport, for ease of assembly, or for other reasons.
  • each support plate 144 is a rectangular member extending transversely across the width of the mattress 10 . As shown in the drawings, there are five such rib-like members 144 spaced apart underneath the head and seat sections of the mattress. In other embodiments, each support plate 144 has its middle section (i.e., the section extending transversely) cut out so that only the two plate ends remain at each spaced-apart end (underneath the bolsters); thereby providing five pairs of support plates 144 spaced apart along the longitudinal length of the mattress 10 .
  • Bolster assembly 86 is similar to bolster assemblies 76 , 78 except that its upper layer includes the vertical bladders 50 of longitudinal sections 214 , 216 .
  • Bolster assembly 86 has a longitudinally-oriented bladder as its lower bolster portion.
  • FIG. 23 A schematic diagram of the pneumatic control system of patient support 10 is shown in FIG. 23 . Reading FIG. 23 from second to first, there is shown a simplified top view of patient support 10 with portions removed to better illustrate the-various air zones 160 , a simplified side view of patient support 10 , a schematic representation of pneumatic valve box 58 , a schematic representation of control unit 42 , and air lines 146 , 148 , 150 linking control unit 42 , valve box 58 , and air zones 160 .
  • air zones 160 of patient support 10 are assigned as follows: zone I corresponds to head section bladder assembly 60 , zone 2 corresponds to seat section bladder assembly 62 , zone 3 corresponds to foot section bladder assembly 64 , zone 4 corresponds to upper side bolsters 140 , zone 5 corresponds to lower side bolsters 142 , zone 6 corresponds to upper foot bolsters 140 , zone 7 corresponds to lower foot bolsters 142 , zone 8 corresponds to first turn-assist bladder 74 , zone 9 corresponds to second turn-assist bladder 74 , zone 10 corresponds to deck filler 90 , and zone 11 corresponds to foot filler 80 .
  • Valve box 58 is located in the foot section 34 of patient support 10 .
  • valve box 58 is releasably coupled to bottom portion 18 of cover 12 in interior region 14 , i.e., by one or more Vecro®-brand fasteners or other suitable coupler.
  • Each air line 150 is coupled at one end to an inlet port 135 on the corresponding bladder or bladder assembly. Each air line 150 is coupled at its other end to a valve assembly 162 .
  • Each valve assembly 162 includes first or fill valve 163 and a second or vent valve 165 .
  • First valves 163 are coupled to air supply 152 of control unit 42 by air lines 148 . First valves 163 thereby operate to control inflation of the corresponding zone 160 i.e. to fill the zone with air.
  • Second valves 165 operate to at least partially deflate or vent the corresponding zone 160 , for example, if the internal air pressure of the zone 160 exceeds a predetermined maximum, or if deflation is necessary or desirable in other circumstances (such as a medical emergency, or for transport of patient support 10 ).
  • Each valve 163 , 165 has an open mode 224 and a closed mode 226 , and a switching mechanism 228 (such as a spring) that switches the value from one mode to another based on control signals from control unit 42 .
  • a switching mechanism 228 such as a spring
  • closed mode 226 air flows from air supply 152 through the value 163 to the respective zone 160 to inflate the corresponding bladders, or in the case of vent valves 165 , from the zone 160 to atmosphere.
  • open mode 228 no inflation or deflation occurs.
  • an emergency vent valve 230 is provided to enable quick deflation of turning bladders 74 which draws air from atmosphere through a filter 164 and also vents air to atmosphere through filter 164 .
  • Air supply 152 is an air pump, compressor, blower, or other suitable air source.
  • Air supply 152 is coupled to a switch valve 155 by air line 146 .
  • Switch valve 166 1 o operates to control whether inflation or deflation of a zone occurs.
  • An optional proportional valve 171 may be coupled to air line 148 to facilitate smooth inflation or deflation of turn-assist bladders 74 , or for other reasons.
  • valve box 58 includes a first valve module 156 and a second valve module 158 .
  • First valve module 156 includes valves generally associated with a patient's first side (i.e., first side, from the perspective of a patient positioned on patient support 10 ) and second valve module 158 includes valves generally associated with a patient's second side (i.e., second side).
  • the various zones 160 are separately inflatable. Certain of the zones 160 are inflated or deflated to allow patient support 10 to conform to different bed frame configurations.
  • the deck filler 90 (zone 10 in FIG. 23 ) is inflated to conform patient support 10 to certain bed frame configurations, such as step deck configurations including the TotalCare® and CareAssist® bed frames, made by Hill-Rom, Inc., the assignee of the present invention, but is deflated when patient support 10 is used with a flat deck bed frame, such as the Advanta® bed made by Hill-Rom, Inc.
  • the foot filler 80 zone 11 in FIG.
  • the lower side bolsters 142 (zone 5 in FIG. 23 ) are not inflated when patient support 10 is used with a VersaCare® bed.
  • the lower foot bolsters 142 (zone 7 in FIG. 23 ) are inflated when patient support 10 is used on flat decks or other bed frames, including the Advanta® and VersaCare® bed frames made by Hill-Rom, Inc.
  • FIGS. 24A and 24B are a simplified schematic diagram of a control system and the patient support or mattress 10 of the present invention.
  • FIG. 24A illustrates the patient support 10 including the various components of patient support 10 whereas FIG. 24B illustrates the control unit 42 and various components therein.
  • the patient support 10 includes the sensor pad 52 which is coupled to the pneumatic valve control box 58 as previously described.
  • the sensor pad 52 includes a head sensor pad 68 and a seat sensor pad 70 .
  • the head sensor pad 68 is located at the head end 32 of the mattress 10 .
  • the seat sensor pad 70 is located at a middle portion of the mattress 10 which is located between the head end 32 and a location of the pneumatic valve control box 58 .
  • the seat sensor pad 70 is located such that a patient laying upon the mattress 10 may have its middle portion or seat portion located thereon when in a reclined state. In addition, when the head end 32 of the mattress 10 is elevated, the seat portion of the patient is located upon the seat sensor pad 70 . As previously described with respect to FIG. 3 , the head sensor pad 68 is located beneath the head section bladder assembly 60 and the seat sensor pad 70 is located beneath the seat section bladder assembly 62 . Each one of the sensors of the head sensor pad 68 or the seat sensor pad 70 is located beneath on at least adjacent to one of the upstanding cylindrical bladders or cushions 50 . A head angle sensor 502 is coupled to the control box 58 where signals received from the sensor 52 may provide head angle information and pressure adjustment information for adjusting pressure in the seat bladders 62 .
  • the sensor pad 52 is coupled through the associated cabling to the pneumatic control box 58 .
  • the pneumatic control box 58 includes a multiplexer 508 coupled to the head sensor pad 68 and the seat sensor pad 70 through a signal and control line 510 .
  • the multiplexer board 508 is also coupled to an air control board 512 which is in turn coupled to a first valve block 514 and a second valve block 516 .
  • a communication/power line 518 is coupled to the control unit 42 of FIG. 24B .
  • a ventilation supply line 520 which provides for air flow through the patient support 10 for cooling as well as removing moisture from the patient is also coupled to the control unit 42 of FIG. 24B .
  • An air pressure/vacuum supply line 522 is coupled to the control unit 42 as well.
  • the control unit 42 of FIG. 24B also illustrated in FIG. 1 , includes the display 44 , which displays user interface screens, and a user interface input device 524 for inputting to the control unit 42 user selectable information, such as the selection of various functions or features of the present device.
  • the selections made on the user interface input device 524 control the operation of the patient support 10 , which can include selectable pressure control of various bladders within the mattress 10 , control of the deck 6 , for instance to put the bed 2 in a head elevated position, as well as displaying the current state of the mattress or deck position, and other features.
  • An algorithm control board 526 is coupled to the user interface input device 524 .
  • the algorithm control board 526 receives user generated input signals received through the input device 524 upon the selection of such functions by the user.
  • the input device 524 can include a variety of input devices, such as pressure activated push buttons, a touch screen, as well as voice activated or other device selectable inputs.
  • the algorithm control board 526 upon receipt of the various control signals through the user input device 524 controls not only the operation of the mattress 10 but also a variety of other devices which are incorporated into the control unit 42 .
  • the algorithm control board 526 is coupled to a display board 528 which sends signals to the display 44 to which it is coupled.
  • the display board 528 is also connected to a speaker 530 which generates audible signals which might indicate the selection of various features at the input device 24 or indicate a status of a patient 1 o positioned on patient support (e.g. exiting) or indicate a status of therapy being provided to the patient (e.g., rotational therapy complete).
  • the algorithm control board 526 receives the required power from power supply 532 which includes an AC input module 534 , typically coupled to a wall outlet within a hospital room.
  • the algorithm control board 526 is coupled to an air supply, which, in the illustrated embodiment includes a compressor 536 and a blower 538 . Both the compressor 536 and the blower 538 receive control signals generated by the algorithm control board 526 .
  • the compressor 536 is used to inflate the air bladders.
  • the blower 538 is used for air circulation which is provided through the ventilation supply line 520 to the mattress 10 . It is, however, possible that the compressor 536 may be used to both inflate the bladders and to circulate the air within the mattress 10 .
  • a pressure/vacuum switch valve 540 is coupled to the compressor 536 which is switched to provide for the application of air pressure or a vacuum to the mattress 10 .
  • a muffler 541 is coupled to the valve 540 .
  • the valve 540 In the pressure position, air pressure is applied to the mattress 10 to inflate the mattress for support of the patient.
  • the valve 540 is used to apply a vacuum to the bladders therein such that the mattress may be placed in a collapsed state for moving to another location or for providing a CPR function, for example.
  • a CPR button 542 is coupled to the algorithm control board 526 .
  • the algorithm control board 526 , the compressor 536 , the blower 538 , and the user input device or user control module 524 are located externally to the mattress and are a part of the control unit 42 , which may be located on the footboard 38 as shown in FIG. 1 .
  • the sensors and sensor pad 52 , the pneumatic valve control box 58 , and the air control board or microprocessor 512 for controlling the valves and the sensor pad system 52 are located within the mattress 10 . It is within the present scope of the invention to locate some of these devices within different sections of the overall system, for instance, such that the algorithm control board 526 could be located within the mattress 10 or the air control board 512 could be located within the control unit 42 .
  • control box 58 includes a multiplexer 252 and an air control board 250 .
  • Control board 250 is coupled to multiplexer 252 by a jumper 254 .
  • Multiplexer 252 is further coupled to head sensor pad 68 and seat sensor pad 70 through a signal and control line (not shown).
  • Control board 250 is also coupled to first valve module 156 and second valve module 158 by wire leads 251 .
  • a communication/power line 258 couples control board 250 to the control unit 42 .
  • Communication line 258 couples to a communication plug 259 of control board 250 .
  • Jumper 254 couples multiplexer 252 to control board 250 for power and access to communication line 258 .
  • Wire leads 251 provide actuation power to first and second valve modules 156 , 158 .
  • An angle sensor cable 256 is provided to send a signal from a head angle sensor 502 to the control board 250 .
  • Angle sensor cable 256 couples to an angle plug 257 of control board 250 .
  • head angle sensor 502 is located within head bolster assembly 76 as indicated by FIG. 24A .
  • Head angle sensor 502 indicates the angle of elevation of the head end 32 of bed 2 as the head section of the frame 4 articulates upwardly raising the patient's head or downwardly lowering the patient's head.
  • angle sensor 502 transmits the angle of head end 32 to all nodes or circuit boards within the mattress control system 42 , 58 .
  • Angle sensor 502 generates an indication or indicator signal when head end 32 is at an angle of at least 5°, at least 30°, and at least 45°.
  • the head angle indication is transmitted to the control unit 42 which evaluates and processes the signal.
  • head end 32 When head end 32 is at an angle above 30° turn assist 74 becomes inoperative primarily for patient safety reasons.
  • head end 32 is at an angle above 45° information is transmitted to control unit 42 for use in the algorithms.
  • the 5° angle indication is primarily to ensure relative flatness of patient support 10 .
  • angle sensor 502 is a ball switch or string potentiometer.
  • first and second valve modules 156 , 158 include fill valves 163 and vent valves 165 .
  • First valve module 156 includes fill valves 163 a - f and vent valves 165 a - f .
  • Second valve module 156 includes fill valves 163 g - l and vent valves 165 g - l .
  • Fill valves 163 a - l and vent valves 165 a - l are 12 Volt 7 Watt solenoid direct active poppet style valves in the illustrated embodiment.
  • Control board 252 is able to actuate each fill valve 163 a - l and vent valve 165 a - l independently or simultaneously.
  • Fill valves 163 a - l and vent valves 165 a - l are all able to be operated at the same time.
  • control board 250 sends a signal to the valve to be operated.
  • the signal causes a coil (not shown) within each valve to energize for 1 ⁇ 2 second and then switches to pulsate power (i.e., turn on and off at a high rate) to save power during activation.
  • the activation in turn cause the valve to either open or close depending on which valve is initiated.
  • Air line 148 includes an outer box line assembly 260 and an inner box line assembly 262 .
  • Outer box line assembly 260 includes an exterior inlet hose 264 and an elbow 266 coupled to exterior inlet hose 264 .
  • Inner box line assembly 262 includes an interior inlet hose 268 coupled to elbow 266 , a union tee connector 270 , a first module hose 272 , and a second module hose 274 .
  • Connector 270 includes a first opening 276 to receive interior inlet hose 268 , a second opening 278 to receive first module hose 272 , and a third opening 280 to receive second module hose 274 .
  • First and second module hoses 272 , 274 each couple through a male coupler 282 to first and second valve modules 156 , 158 respectively.
  • air from air supply 152 travels through supply line 148 , enters outer box line assembly 260 through exterior inlet hose 264 and passes through elbow 266 to interior inlet hose 268 .
  • the air then travels from inlet hose 268 to union tee connector 270 where the air is divided into first module hose 272 and second module hose 274 .
  • the air passes through first and second module hoses 272 , 274 into first and second valve modules 156 , 158 respectively.
  • the operation of first and second valve modules 156 , 158 is described below.
  • Control box 58 includes a base 284 , a cover 286 , and a tray 288 .
  • Cover 286 includes a plurality of fasteners (i.e., screws) 290 .
  • Base 284 includes a plurality of threaded cover posts 292 .
  • Cover posts 292 are configured to receive screws 290 to couple cover 286 to base 284 .
  • Cover 286 and base 284 define an inner region 298 .
  • Tray 288 couples to base 284 with a plurality of rivets 291 riveted through a plurality of rivet holes 293 located on tray 288 and base 284 .
  • Inner box line assembly 262 , first valve module 156 , second valve module 158 , control board 250 , and multiplexer 252 are contained within inner region 298 .
  • Base 284 further includes a plurality of control board posts 294 , a plurality of multiplexer posts 296 , and a plurality of module posts 300 .
  • First and second valve modules 156 , 158 are coupled to module posts 300 by shoulder screws 302 and washers 304 .
  • Control board 250 and multiplexer 252 are respectively coupled to control board posts 294 and multiplexer posts 296 by a plurality of snap mounts 306 .
  • First and second valve modules 156 , 158 attach to third air lines 150 a, b, d-f, and g - l through a plurality of couplers 308 .
  • Couplers 308 include a first end 310 and a second end 312 .
  • Third air lines 150 a, b, d - f, and g - l each include a fitting (not shown) receivable by second end 312 .
  • Each first end 310 mounts to a port 314 in first and second valve modules 156 , 158 .
  • First end 310 mounts through a plurality of openings 316 in base 284 .
  • a plurality of feedback couplers 318 mount through a plurality of feedback openings 320 in base 284 .
  • Feedback couplers 318 include a first feedback end 322 and a second feedback end 324 .
  • First feedback end 322 couples to a feedback line (not shown) that in turn couples to a feedback port 135 located on each air zone 160 .
  • Second feedback end 324 receives a feedback transfer line 326 .
  • Each transfer line 326 couples to a pressure transducer 328 located on the control board 250 .
  • Pressure transducer 328 receives the pressure from each air zone 160 and transmits to control unit 42 a pressure data signal representing the internal air pressure of the zone 160 .
  • Control unit 42 uses these pressure signals to determine the appropriate pressures for certain mattress functions such as CPR, patient transfer, and max-inflate. Pressure signals from the transducer 328 coupled to the foot zone 160 k are also used to maintain optimal pressure in foot zone 160 k . In the illustrated embodiment, pressure in foot zone 160 k (zone 3 ) is computed as a percentage of the pressure in seat zone 160 e (zone 2 ). The pressures in seat zone 160 e and head zone 160 f are determined using both the tranducers 328 and the pressure sensors 136 . The pressures in one or more of the zones 160 may be adjusted in real time.
  • fill valves 163 a - l and vent valves 165 a - l are coupled to various portions of patient support 10 through third air lines 150 a, b, d - f, and g - l .
  • Fill valve 163 a and vent valve 165 a are coupled to upper foot bolsters 140 c
  • fill valve 163 b and vent valve 165 b are coupled to lower side bolsters 142 a, b
  • fill valve 163 c is coupled to atmosphere and vent valve 165 c is reserved for future therapies.
  • fill valve 163 d and vent valve 165 d are coupled to first turn assist 74 a
  • fill valve 163 e and vent valve 165 e are coupled to seat bladders 62
  • fill valve 163 f and vent valve 165 f are coupled to head bladder assembly 60
  • fill valve 163 g and vent valve 165 g are coupled to foot filler 80
  • fill valve 163 h and vent valve 165 h are coupled to upper side bolsters 140 a, b
  • fill valve 163 i and vent valve 165 i are coupled to deck filler 90
  • fill valve 163 j and vent valve 165 j are coupled to first turn assist 74 b
  • fill valve 163 k and vent valve 165 k are coupled to foot bladders 164
  • fill valve 163 l and vent valve 165 l are coupled to lower foot bolsters 142 c .
  • Vent valves 165 d , j are biased in the open position to vent air from first and second turn assist 74 a , 74 b when first and second turn assist 74 a , 74 b are not in use. Vent valves 165 d, j return to their open position if the mattress loses power or pressure venting air from the first and second turn assist 74 a , 74 b .
  • the pressure in the zone 160 after deflation is determined by the control system 42 , 58 in real time rather than being predetermined.
  • a user enters an input command to control unit 42 .
  • Control unit 42 processes the input command and transmits a control signal based on the input command through communication line 258 to control board 250 .
  • control signals could be based on operational information from control unit 42 to increase or decrease pressure within one or more of the zones 160 based on information obtained from transducers 328 and/or sensors 136 .
  • the mattress controls 42 , 58 are independent from operation of the bed frame 4 .
  • bed frame 4 and mattress 10 may be configured to exchange or share data through communication lines.
  • data is communicated from bed frame 4 to mattress system 42 , 58 and used to adjust support parameters of mattress 10 .
  • a signal is transmitted from frame 4 when foot section 34 is retracting, so that mattress systems 42 , 58 responds by decreasing internal pressure of vertical bladders 50 in foot assembly 64 .
  • air supply 152 is capable of supplying air or acting as a vacuum to remove air from zones 160 .
  • a microprocessor on control board 250 actuates corresponding fill valve 163 a - l or vent valve 165 a - l based on the control signal from control unit 42 . For example, if the control signal indicates the pressure in head bladder assembly 160 is to be increased fill valve 163 f is actuated. However, if the control signal indicates the pressure in head bladder assembly 160 is to be decreased vent valve 165 f is actuated. While in vacuum mode one or more fill valves 163 a - l may be actuated to allow for rapid removal of air within the corresponding zones.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
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  • Molecular Biology (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Physiology (AREA)
  • Dentistry (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Invalid Beds And Related Equipment (AREA)
  • Mattresses And Other Support Structures For Chairs And Beds (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Materials For Medical Uses (AREA)
  • Accommodation For Nursing Or Treatment Tables (AREA)
  • Measuring And Recording Apparatus For Diagnosis (AREA)
US11/120,080 2004-04-30 2005-05-02 Patient support Abandoned US20070235036A1 (en)

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US12/644,178 US8146191B2 (en) 2004-04-30 2009-12-22 Patient support

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US66524105P 2005-03-25 2005-03-25
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