EP3672556A1 - Accessoire de support gonflable chirurgical à sécurité intégrée - Google Patents

Accessoire de support gonflable chirurgical à sécurité intégrée

Info

Publication number
EP3672556A1
EP3672556A1 EP18796425.9A EP18796425A EP3672556A1 EP 3672556 A1 EP3672556 A1 EP 3672556A1 EP 18796425 A EP18796425 A EP 18796425A EP 3672556 A1 EP3672556 A1 EP 3672556A1
Authority
EP
European Patent Office
Prior art keywords
air
air chamber
storage accessory
accessory
storage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP18796425.9A
Other languages
German (de)
English (en)
Inventor
Manfred Piontek
Siegfried HUND
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.)
Maquet GmbH
Original Assignee
Maquet GmbH
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 Maquet GmbH filed Critical Maquet GmbH
Publication of EP3672556A1 publication Critical patent/EP3672556A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • A61G13/00—Operating tables; Auxiliary appliances therefor
    • A61G13/10—Parts, details or accessories
    • A61G13/12—Rests specially adapted therefor; Arrangements of patient-supporting surfaces
    • A61G13/126—Rests specially adapted therefor; Arrangements of patient-supporting surfaces with specific supporting surface
    • A61G13/1265—Rests specially adapted therefor; Arrangements of patient-supporting surfaces with specific supporting surface having 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
    • A61G13/00—Operating tables; Auxiliary appliances therefor
    • A61G13/10—Parts, details or accessories
    • A61G13/12—Rests specially adapted therefor; Arrangements of patient-supporting surfaces
    • A61G13/1205—Rests specially adapted therefor; Arrangements of patient-supporting surfaces for specific parts of the body
    • A61G13/123—Lower body, e.g. pelvis, hip, buttocks
    • 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
    • A61G13/00—Operating tables; Auxiliary appliances therefor
    • A61G13/10—Parts, details or accessories
    • A61G13/12—Rests specially adapted therefor; Arrangements of patient-supporting surfaces
    • A61G13/128—Rests specially adapted therefor; Arrangements of patient-supporting surfaces with mechanical surface adaptations
    • A61G13/129—Rests specially adapted therefor; Arrangements of patient-supporting surfaces with mechanical surface adaptations having surface parts for adaptation of the size, e.g. for extension or reduction
    • 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
    • A61G2200/00—Information related to the kind of patient or his position
    • A61G2200/30—Specific positions of the patient
    • A61G2200/32—Specific positions of the patient lying
    • 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
    • A61G2203/10—General characteristics of devices characterised by specific control means, e.g. for adjustment or steering
    • 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
    • A61G2203/70—General characteristics of devices with special adaptations, e.g. for safety or comfort

Definitions

  • the present disclosure relates to an inflatable storage accessory for storing a patient during a surgical procedure.
  • Non-Patent Literature N2 Attachment to the application.
  • document DE 314 727 A discloses a circular infirmary.
  • the documents DE 759 394 A and DE 377 767 A relate to mattresses or mattress parts.
  • the document DE 20 2017 002 188 U1 discloses in its Fig. 4 a leg pad, which is therefore not suitable for use in kidney surgery.
  • Document DE 2 103 499 A shows an alternating pressure lying pillow.
  • the document US 2010/0089411 AI shows a mattress-like patient support system with numerous air cells.
  • the air cushion known from AT 137 152 B has a single air chamber.
  • the inflatable positioning accessory in the form of an elongated roll for supporting a patient during kidney surgery may be intended to be placed on a suitable location on an operating table so as to serve as a tray for a body part of a patient so that the kidney area of the patient in a necessary for kidney surgery stretched position can be brought.
  • the storage accessory may include:
  • an inflatable shell defining the outer dimensions of the storage accessory; and a first inside the shell befindliches air chamber system, which can be filled to inflate the shell with air.
  • the inflatable storage accessory may be characterized by comprising a second air chamber system located within the envelope, which may be filled with air to inflate the envelope. It may also be characterized in that the second air chamber system from the first Air chamber system is fluidly separated, so that a leak in the one air chamber system can not lead to air loss in the other air chamber system.
  • the storage accessories according to the disclosure are failsafe and suitable for use in surgery.
  • At least one of the two air chamber systems of the storage accessory may have a plurality of air cells.
  • Both air chamber systems may each comprise a plurality of air cells.
  • the air cells of the two air chamber systems can be arranged alternately within the shell.
  • the storage accessory may extend along a longitudinal axis (X-X), wherein the air cells may be arranged in a row along this longitudinal axis.
  • the air cells may be disc-shaped.
  • At least one air chamber system may have a manifold for supplying the associated air cells.
  • each manifold can be realized as an elongated airbag.
  • the storage accessory can be converted into a plump roll form by inflating it from a flat rectangular shape.
  • the storage accessory may have a drop-shaped or symmetrical, for example. Mushroom-shaped cross section in the inflated state.
  • the storage accessory may be equipped with an air pressure monitoring device for monitoring the level of air pressure in the two air chamber systems, such as a pressure gauge.
  • the storage accessory may include an air pump for inflating the envelope.
  • the storage accessory may include a controller.
  • the control device may be configured to receive, for example, air pressure values from the air pressure monitoring device and to determine from the received air pressure values whether the air pressure in one of the air chamber systems drops.
  • the control device may also be arranged to-if the air pressure drops in one of the air chamber systems-compensate for this by increasing the air pressure in the other air chamber system by means of the pump, and thus to prevent a sinking of a patient stored on the storage accessory.
  • the storage accessory may have a shell which is provided with a padding, for example. Foam.
  • the storage accessory may include a tee for connecting an air pump to the two air chamber systems.
  • the storage accessory may each include a check valve per air chamber system by means of which the associated air chamber system may be fluidly separated from an air source.
  • the storage accessory may have a mushroom-shaped cross-section when inflated.
  • Both air chamber systems may each comprise a plurality of air cells, wherein the air cells of the two air chamber systems may be arranged alternately within the shell.
  • Figure 1 is a perspective view of a first embodiment of the storage accessory of the invention
  • Figure 2 shows a second embodiment of the storage accessory according to the invention
  • Figure 3a is a schematic longitudinal section according to III-III in Figures 1 and 2;
  • Figure 3b is a schematic cross section of the storage accessory of Figure 1;
  • Figures 4 illustrate by way of example the use of the storage equipment according to the invention on the patient.
  • FIG. 1 shows a first embodiment 10 of a storage accessory according to the disclosure.
  • This storage accessory has an inflatable shell 12 that defines the outer dimensions of the storage accessory 10.
  • the shell 12 of the storage accessory 10 with a padding, for. As foam, be provided in order to achieve a more comfortable storage of the patient.
  • a padding for. As foam, be provided in order to achieve a more comfortable storage of the patient.
  • the storage accessory 10 In the inflated state shown in FIG. 1, the storage accessory 10 has a substantially box-shaped shape.
  • the shape of the storage accessory 10 substantially corresponds to that of an elongated roll.
  • the cross-section of the storage accessory 10 is mushroom-shaped.
  • the mushroom head provided by the mushroom shape has a large bearing surface and thus exerts far less surface pressure on the patient. This avoids severe postoperative injuries such as Pressure ulcers or nerve separations.
  • the storage accessory 10 extends along a longitudinal axis X-X. It has a front 10.1, a back 10.2, two long sides 10.3 and 10.4, a top 10.6 and a bottom 10.7. The end portions of the longitudinal sides 10.3, 10.4 bear the reference numeral 10.5.
  • the bottom 10.7 serves as a support surface with which the storage accessory 10 rests on the operating table in use.
  • the support surface 10.7 is best just trained to ensure greater security against rotation or tilting of the storage accessory 10.
  • a planar expression also minimizes the sinking of the storage accessory 10 in the pad of the operating table.
  • the longitudinal sides 10.3 and 10.4 are preferably straight in the inflated state and form a substantially right angle in relation to the bottom 10.7. Thus, the longitudinal sides 10.3 and 10.4 run in use on the operating table substantially perpendicular, whereby the storage accessory 10 has a larger stroke between the deflated and the maximum inflated state, as in curved longitudinal sides.
  • the storage accessory 10 Via a T-piece 14, the storage accessory 10 is connected to an air pump 16.
  • the T-piece 14 has two shut-off valves 18. These can each sit in an air hose 19 of the T-piece 14.
  • one of the two air hoses 19 is connected in the end region 10.5 of a 10.3 of the two longitudinal sides of the storage accessory 10, and the other air hose 19 is connected in the end region 10.5 of the opposite longitudinal side 10.4 of the storage accessory 10. Due to this positioning of the air hoses 19, they can not be squeezed off when the patient is lying on the storage accessory 10.
  • the storage accessory 10 is inflated.
  • the air is distributed via the T-piece 14 to two separate air chamber systems of the storage accessory 10. With the shut-off valves 18, each of the two air chamber systems can be fluidly separated from the air pump 16.
  • FIG. 2 shows a second embodiment 20 of the storage accessory according to the invention.
  • the storage accessory 20 differs from the storage accessory 10 by its other cross-section, which in this case is teardrop-shaped. Otherwise, both storage accessories 10 and 20 are identical.
  • FIG. 3a schematically shows a longitudinal section of the mounting accessories 10, 20.
  • the two separate air chamber systems 22, 24 are shown, which each have four air cells 26 in the illustrated example.
  • the air cells of the air chamber system 22 are indicated by the +, while the air cells of the other system 24 are characterized by the -.
  • the air cells 26 of the two air chamber systems within the shell 12 z. B. arranged alternately.
  • the air cells 26 are arranged, for example, in a row along the longitudinal axis X-X.
  • the first air chamber system 22 is fluidly separated from the second system 24, i. a leak in one air chamber system will not result in air leakage in the other air chamber system.
  • the air cells 26 may be disc-shaped within the storage accessory 10, 20.
  • pressure gauges 28 may be provided in the air cells 26 or in the air ducts.
  • Such an air pressure monitoring device for monitoring the height of the air pressure in the two air chamber systems 22, 24 can work with pressure sensors 28, for example.
  • the pressure sensors 28 may transmit measured air pressure values to a control device 30. This can determine whether the air pressure drops in an air chamber system and initiate appropriate countermeasures.
  • the controller 30 could drive the pump 16 to increase the pressure in the air chamber system unaffected by the pressure drop until the original lift height of the storage accessory 10, 20 before leakage and, thus, the original patient extension, are regained.
  • the air pressure monitoring may alternatively or additionally be visualized e.g. of the anesthetist when the storage accessory 10, 20 is equipped with a pressure gauge for each independent air chamber system.
  • a pressure gauge for each independent air chamber system.
  • such pressure displays are located on the air hoses 19th
  • FIG. 3b shows one of the air cells 26 in cross section. It can be seen along each of the long sides 10.3 and 10.4 within the shell 12 two manifolds 31.
  • the manifolds 31 each belong to one of the two air chamber systems 22, 24.
  • Each bus 31 supplies its associated air cells 26 via openings 33 with compressed air.
  • Each air hose 19 is connected to one of the two manifolds 31.
  • each bus 31 is realized as an airbag extending in the direction of the longitudinal axis X-X from the front 10.1 to the rear 10.2.
  • This airbag 31 may in particular be welded to the shell 12.
  • This design has two advantages over compressed air hoses: on the one hand, the air sacs in the X-ray form little or no artifacts on the X-ray image. On the other hand, the patient is more comfortable on the air bags according to the disclosure 31 than on hoses.
  • Figures 4a and 4b show by way of example the use of the storage accessory 10, 20 in a surgical procedure.
  • the inflatable storage accessory 10, 20 is placed in the airless state at the appropriate place on the operating table.
  • the storage accessories 10, 20 has a rectangular shape in plan view.
  • the air-empty state of the storage accessory 10, 20 is indicated in Figures 4a and 4b with dashed lines. Then, the patient P is placed on the operating table O, so that he on the Storage accessories 10, 20 is located. Now, the storage accessory 10, 20 is inflated by the pump 16 to bring the patient in the extended position.
  • FIG. 4a shows a patient mounted in a lateral position on an operating table, wherein an elongate storage accessory 10, 20 having a mushroom-shaped cross section is positioned on the operating table such that it supports the waist region of the patient. Such positioning is very helpful, for example, in kidney surgery.
  • FIG. 4b further shows an elongated storage accessory 10, 20 having a wing-shaped cross-section which supports the back region of the patient.
  • the surgical team may disconnect the affected air chamber system from the air supply by means of the associated check valve 18. Then, by means of the pump 16, the intact air chamber system can be supplied with additional air to prevent a sinking of the storage accessory 10, 20. This process can be done not only manually by the operating personnel but also fully automatically by a control with the control device 30.
  • the storage accessory 10, 20 of the present invention it is possible to dynamically adjust the position of the patient P during the operation.
  • the storage accessories 10, 20 additionally inflated or drained from this air.
  • the end portions 10.5 of the two longitudinal sides 10.3, 10.4 of the inflatable storage accessories 10, 20 may, for example, and without limitation be defined as areas that are 10% or 20% of the length of the long sides 10.3, 10.4 and from the front side 10.1 and the back 10.2 to the center of the storage accessory 10, 20 extend.
  • the end regions 10.5 can alternatively be defined as areas that z. B. 5, 10 or 20 centimeters of the length of the long sides 10.3, 10.4 and the respective front 10.1 and the back are 10.2 closest.
  • the end portions 10.5 of the two longitudinal sides 10.3, 10.4 also correspond to the sections of the longitudinal sides 10.3, 10.4, in which the two air hoses 19 of the T-piece 14 are connected.
  • the present disclosure also relates to a storage accessory 10, 20 comprising at least three separate air chamber systems 22, 24, wherein each of the air chamber systems 22, 24 has separate connections for air hoses 19 and shut-off valves 18.
  • each air chamber system 22, 24 may comprise its own manifold 31.
  • each Manifold 31 may be fluidly connected both to an air hose 19 associated therewith and to each of the plurality of air cells 26 of the air chamber system 22, 24 via openings 33.
  • Each manifold 31 can supply its associated plurality of air cells 26 with compressed air, for example via a single opening 33 connected to an air hose 19.
  • the manifolds 31 are made from a soft, radiation-transmissive material that is compressively compressible and can shrink along with other parts of the storage accessory 10, 20.
  • This disclosure further relates to methods for supporting and positioning patients on a treatment table (eg, an operating table) during a medical procedure.
  • An example method may include the following steps:
  • This exemplary method may be a kidney surgical procedure in which the storage accessory 10, 20 is placed in an appropriate location on an operating table and then inflated to place the kidney area of the patient in an extended position.
  • two or more separate air chamber systems 22, 24 are inflated before the process and during the process, respectively.
  • the method described above may include an additional step performed if one of the air chamber systems 22, 24 fails during an intervention on the patient.
  • the additional step can be performed as follows:
  • the storage accessory 10, 20 may be a length when inflated which is at least twice or at least three times its maximum thickness. In some embodiments, the storage accessory 10, 20 may have a substantially straight and linear shape. In some embodiments, the storage accessory 10, 20 may be elongate and, when inflated, may have an oval, rectangular, mushroom, muffin, wedge, square, circular, or airfoil-shaped cross-section.
  • the storage accessory according to the invention offers the following advantages in particular:
  • the storage accessory 10, 20 is in use on the surface of the upholstery of the operating table. In this way, there is a direct transition between the storage accessory 10, 20 and the operating table, with no gap therebetween. Such unwanted gaps exist in the known body bridges integrated in the operating table. In such gaps, the patient may get pinched and suffer severe postoperative injuries.
  • the storage accessory can be positioned freely on the operating table and can be easily repositioned if necessary.
  • the surface pressure on the patient is compared to conventional body bridges due to the shape and the composite structure of a compressible air body with a soft outer skin and, for example, integrated foam lower than in previous systems.

Landscapes

  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Accommodation For Nursing Or Treatment Tables (AREA)
  • Invalid Beds And Related Equipment (AREA)

Abstract

L'invention concerne un accessoire de support (10) gonflable sous forme d'un rouleau allongé pour supporter un patient pendant une intervention chirurgicale au niveau des reins, l'accessoire de support étant conçu pour être placé en un endroit approprié sur une table d'opération pour ainsi servir de support à une partie corporelle d'un patient de manière telle que la zone des reins du patient est amenée dans une position étirée nécessaire pour l'intervention chirurgicale au niveau des reins. L'accessoire de support comprend les éléments suivants : – une enveloppe gonflable (12) qui définit les dimensions externes de l'accessoire de support ; et – un premier système de chambre à air (22) se trouvant à l'intérieur de l'enveloppe, qui peut être rempli d'air pour le gonflage à l'air (12). Selon l'invention, un deuxième système de chambre à air (24) se trouve à l'intérieur de l'enveloppe (12) et peut être rempli d'air pour le gonflage de l'enveloppe (12) et le deuxième système de chambre à air (24) est séparé fluidiquement du premier système de chambre à air (22), de telle sorte qu'une fuite dans un système de chambre à air n'entraîne pas de perte d'air dans l'autre système de chambre à air.
EP18796425.9A 2017-10-30 2018-10-30 Accessoire de support gonflable chirurgical à sécurité intégrée Withdrawn EP3672556A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017125485.4A DE102017125485A1 (de) 2017-10-30 2017-10-30 Aufblasbares chirurgisches Lagerungszubehör mit Einfehlersicherheit
PCT/EP2018/079756 WO2019086484A1 (fr) 2017-10-30 2018-10-30 Accessoire de support gonflable chirurgical à sécurité intégrée

Publications (1)

Publication Number Publication Date
EP3672556A1 true EP3672556A1 (fr) 2020-07-01

Family

ID=64083095

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18796425.9A Withdrawn EP3672556A1 (fr) 2017-10-30 2018-10-30 Accessoire de support gonflable chirurgical à sécurité intégrée

Country Status (7)

Country Link
US (1) US11311442B2 (fr)
EP (1) EP3672556A1 (fr)
JP (1) JP2021500946A (fr)
KR (1) KR20200076671A (fr)
CN (1) CN111163740A (fr)
DE (1) DE102017125485A1 (fr)
WO (1) WO2019086484A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3689316B1 (fr) 2019-01-29 2024-09-25 Baxter Medical Systems GmbH + Co. KG Système comprenant une table d'opération, un coussin d'air et un compresseur d'air

Citations (1)

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Publication number Priority date Publication date Assignee Title
US6065166A (en) * 1996-10-17 2000-05-23 O.R. Comfort, Llc Surgical support cushion apparatus and method

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DE314727C (fr) *
GB182837A (en) * 1921-01-20 1922-07-20 Plantation Rubber Mfg Company Improvements in or relating to air beds, cushions and the like
AT137152B (de) * 1933-02-24 1934-04-10 Alexander Dr Gudra Aufblasbares Luftkissen.
DE759394C (de) * 1941-05-22 1953-06-08 Richard Guenther Luftpolsterung mit aufblasbaren Zellen fuer Matratzen od. dgl.
GB1286197A (en) * 1970-03-13 1972-08-23 Ronald James Peter Evans Improvements in or relating to alternating pressure pads for bed patients
US5613254A (en) * 1994-12-02 1997-03-25 Clayman; Ralph V. Radiolucent table for supporting patients during medical procedures
JP3182060B2 (ja) * 1995-08-03 2001-07-03 株式会社ケープ エアマット装置
ATE261290T1 (de) * 1997-11-07 2004-03-15 Hill Rom Services Inc Operationstisch
JP4494818B2 (ja) * 2004-02-09 2010-06-30 九州日立マクセル株式会社 床ずれ防止マット
JP2010051597A (ja) * 2008-08-28 2010-03-11 Paramount Bed Co Ltd エアセルシート
US8678006B2 (en) * 2008-10-10 2014-03-25 Winston Allen Porter, III Patient support system and method
CN203841967U (zh) 2014-05-12 2014-09-24 青岛市市立医院 一种可调节充气式体位垫
CN203802744U (zh) * 2014-05-30 2014-09-03 高爱华 颅脑术用防压疮交替充气式床垫
CN204092480U (zh) * 2014-10-15 2015-01-14 四川大学华西第二医院 一种开腹宫颈癌手术可调式充气型体位垫
CN204274906U (zh) 2014-12-05 2015-04-22 段海玲 医用肾组织活检专用床
CN204562771U (zh) * 2015-04-17 2015-08-19 南方医科大学南方医院 小儿脊髓脊膜膨出床垫
WO2017064183A2 (fr) 2015-10-16 2017-04-20 Pearl Technology Ag Système de support pour supporter une partie du corps
DE202017002188U1 (de) * 2017-04-26 2017-05-30 Matthias Wildschütte Lagerungskissen
CN107224380A (zh) 2017-05-27 2017-10-03 江苏海泽医疗科技发展有限公司 充气式可变形体位垫

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6065166A (en) * 1996-10-17 2000-05-23 O.R. Comfort, Llc Surgical support cushion apparatus and method

Also Published As

Publication number Publication date
US20200337928A1 (en) 2020-10-29
DE102017125485A1 (de) 2019-05-02
WO2019086484A1 (fr) 2019-05-09
CN111163740A (zh) 2020-05-15
KR20200076671A (ko) 2020-06-29
JP2021500946A (ja) 2021-01-14
US11311442B2 (en) 2022-04-26

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