US20090156112A1 - Toxic gas exposure preventing system for anatomic practice room - Google Patents

Toxic gas exposure preventing system for anatomic practice room Download PDF

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Publication number
US20090156112A1
US20090156112A1 US12/282,285 US28228506A US2009156112A1 US 20090156112 A1 US20090156112 A1 US 20090156112A1 US 28228506 A US28228506 A US 28228506A US 2009156112 A1 US2009156112 A1 US 2009156112A1
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United States
Prior art keywords
hood
pull
air flow
toxic gas
dissecting
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
US12/282,285
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English (en)
Inventor
Yuji Kubota
Yuki Fujishiro
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Koken Co Ltd
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Koken Co Ltd
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
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Assigned to KOKEN LTD. reassignment KOKEN LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: FUJISHIRO, YUKI, KUBOTA, YUJI
Publication of US20090156112A1 publication Critical patent/US20090156112A1/en
Abandoned legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
    • A61B90/40—Apparatus fixed or close to patients specially adapted for providing an aseptic surgical environment
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B16/00—Devices specially adapted for vivisection or autopsy
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
    • A61B90/40—Apparatus fixed or close to patients specially adapted for providing an aseptic surgical environment
    • A61B2090/401—Apparatus fixed or close to patients specially adapted for providing an aseptic surgical environment using air flow
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B2218/00—Details of surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B2218/001—Details of surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body having means for irrigation and/or aspiration of substances to and/or from the surgical site
    • A61B2218/002—Irrigation
    • A61B2218/006—Irrigation for smoke evacuation

Definitions

  • the present invention relates to a toxic gas exposure preventing ventilation system for an anatomic practice room.
  • the present invention is concerned with a system for preventing the exposure of toxic gas (e.g., formaldehyde gas) issuing mainly from an antiseptic such as formalin when conducting an anatomic practice for a donor body, i.e. specimen, having been subjected to an antiseptic treatment using formalin for example.
  • toxic gas e.g., formaldehyde gas
  • An anatomic practice performed by medical students or the like is called a medicine faculty type anatomic practice.
  • plural donor bodies having been subjected to an antispectic treatment using formalin for example are usually dissected simultaneously on plural dissecting tables in a practice room. Since this practice is performed in the presence of many persons and for a long time, it is necessary that toxic gas, e.g., formaldehyde gas, evolved from donor bodies be removed efficiently and economically.
  • toxic gas e.g., formaldehyde gas
  • the present invention firstly resides in a toxic gas exposure preventing system for an anatomic practice room, characterized in that a push hood having a uniform air flow blow-off mechanism, i.e. supply uniform air flow mechanism, and a pull hood having an air flow suction mechanism are disposed for each of plural dissecting tables in the anatomic practice room and independently of each of the dissecting tables in such a manner that at least a portion of a uniform air flow passes in contact with a donor body on the dissecting table and is thereafter sucked into the pull hood.
  • a push hood having a uniform air flow blow-off mechanism i.e. supply uniform air flow mechanism
  • a pull hood having an air flow suction mechanism are disposed for each of plural dissecting tables in the anatomic practice room and independently of each of the dissecting tables in such a manner that at least a portion of a uniform air flow passes in contact with a donor body on the dissecting table and is thereafter sucked into the pull hood.
  • the present invention secondly resides in the above system wherein a filter having a toxic gas adsorbing function is installed within the pull hood.
  • the present invention thirdly resides in the above system wherein the filter installed within the pull hood is positioned lower than the air flow suction mechanism and a cleaned air flow is exhausted into the room from a position lower than the dissecting table.
  • the present invention fourthly resides in the above system wherein a filter having a toxic gas adsorbing function is installed also within the push hood.
  • the present invention fifthly resides in the above system wherein the height of an air flow blow-off opening surface of the push hood and/or the height of an air flow suction opening surface of the pull hood are (is) adjustable.
  • the present invention sixthly resides in the above system wherein the height adjustment is made by a double structure of the opening surface(s) or using a shielding plate(s) disposed vertically movably in the opening surface(s).
  • the present invention seventhly resides in the above system wherein the height adjustment is made by a height adjusting base portion(s) underlying the pull hood and/or the push hood.
  • the present invention eighthly resides in the above system wherein the push hood and the pull hood are disposed opposedly to each other at both ends in a longitudinal direction of each of the dissecting tables.
  • the present invention ninthly resides in the above system wherein one push hood is disposed at a position higher than each of the dissecting tables and a pair of pull hoods are disposed opposedly to each other at least outside both ends in a longitudinal direction of each of the dissecting tables, thereby allowing a uniform air flow to pass as a descending flow.
  • the present invention tenthly resides in the above ninth system wherein a pair of pull hoods are disposed opposedly to each other also at both ends in a transverse direction of each of the dissecting table.
  • the toxic gas exposure preventing system of the present invention By using the toxic gas exposure preventing system of the present invention it is possible to effectively prevent the exposure of toxic gas such as formaldehyde gas by using an extremely small air flow without impairing the workability of students taking practice. Besides, the device of the present invention can be installed and moved easily while using existing anatomic practice room and dissecting tables as they are without the need of such a work as installing an exhaust duct. Further, it is possible to ensure a high air conditioning efficiency.
  • FIG. 1 is an explanatory diagram showing an example of installation of a toxic gas exposure preventing system according to the present invention.
  • FIG. 2 is an explanatory diagram showing an example of a push hood having a height adjusting function.
  • FIG. 3 is an explanatory diagram showing an example of opening surfaces of a double structure.
  • FIG. 4 is an explanatory diagram showing an example of shielding plates disposed on an opening surface.
  • FIG. 5 is an explanatory diagram showing another example of a toxic gas exposure preventing system according to the present invention.
  • FIG. 6 is an explanatory diagram showing an example of a pull hood used in the installation example of FIG. 5 .
  • a predetermined push-pull ventilation system is installed for each of dissecting tables in an anatomic practice room.
  • the push-pull ventilation system is to be installed, one of the following two installation methods if roughly classified may be adopted in the present invention. It is FIG. 1 that illustrates the whole of the first embodiment of installation method and it is FIG. 2 that illustrates the whole of the second embodiment of installation method.
  • the first embodiment concerns a horizontal flow or obliquely downward flow type.
  • a push hood 1 as an air blow-off hood is disposed on a donor body foot-side of each dissecting table, while a pull hood 2 as an air suction hood is disposed on a donor body head side of the same table, or vice versa.
  • the hood height be as low as possible so as not to obstruct a practicing work, provided the hood height is preferably higher than the height of the donor body on the table.
  • the push hood may be somewhat raised upward so that an air flow is blown off obliquely downward.
  • a uniform air flow is blown off as a horizontal flow from the push hood 1 toward the pull hood 2 .
  • the uniform air flow is meant a state in which the magnitude of the flow velocity is substantially constant anywhere in its section when the flow is seen in terms of a section perpendicular to the flow.
  • a state in which variations in velocity distribution in the absence of any obstacle is within ⁇ 30%, preferably ⁇ 20%, of a mean value indicates the uniform air flow.
  • the push hood 1 has an air flow blow-off opening at a position higher than each dissecting table, there may be used a suitable conventional push hood. However, it is preferable to adopt such a configuration as illustrated in the figure wherein the whole is a vertical thin plate-like structure and the indoor air is taken in from a lower portion on the side opposite to the air blow-off opening.
  • the pull hood like the conventional pull hood, it has an exhaust fan and makes the indoor ventilation possible. It is preferable that a filter for adsorbing toxic gas such as formaldehyde gas issued from a donor body be installed within the pull hood used in the present invention.
  • the filter may be a suitable conventional filter insofar as it can remove toxic gas typical of which is formaldehyde gas.
  • the push hood there sometimes is a case where it is preferable that a filter for adsorbing toxic gas such as formaldehyde be installed within the push hood, although the necessity thereof is smaller than that for the pull hood.
  • a course dust filter be disposed in an air intake port of the push hood. Likewise, it is preferable to dispose a course dust filter in the pull food.
  • the filter-installed position within the pull hood 2 may be inside an opening surface 3 ′ located in an upper portion of the pull hood.
  • the interior of the pull hood 2 be formed as an upper, lower, two-stage structure and that a fan be disposed in the upper stage and a filter receptacle portion 4 be provided in the lower stage.
  • the filter there may be used a known filter capable of removing toxic gas typified by formaldehyde gas. But, particularly, an arranged structure of plural sheets, say, 5 to 10 sheets, of activated charcoal filters is preferred.
  • the lower portion of the pull hood having the filter receptacle portion is larger in required size than the upper portion having an air flow sucking function, so it is preferable that a part of the pull hood be positioned below the dissecting table to save the space.
  • exhaust be done through the entire surface of the lower portion of the pull hood (arrows indicating air flowing directions, i.e., exhaust directions into the room, are described as only right and left directions in the figure and forward and backward arrows are omitted).
  • exhaust is generally outdoor exhaust, but in the system of the present invention, since very clean air resulting from filtration of toxic gas through the filter can be exhausted in a relatively small amount, it becomes possible to effect indoor exhaust and hence possible to attain the reduction in size of the system and space-saving without affecting the air conditioning performed by an air conditioner or the like and without the need of laying pipes or the like.
  • indoor exhaust can be done in four directions from the lower portion of the pull hood, and even when it is necessary to install the pull hood in contact with a wall surface, it is possible to effect exhaust in the remaining three directions. Consequently, in comparison with a like system permitting exhaust in only one direction, the amount of exhaust air flowing near the feet of apprentices can be decreased to a completely inappreciable extent for the apprentices.
  • the push hood and the pull hood are each provided with casters 5 as shown in the figure to permit easy movement thereof.
  • the area of the air flow blow-off opening surface of the push hood and that of the pull hood are equal to each other, or the latter is the larger.
  • a vertical adjusting mechanism for adjustment to an appropriate position (height) is provided for each of the push hood and the pull hood because all the dissecting tables are not always equal in height or a certain donor body may be very big.
  • the vertical adjusting mechanism there may be used any of various mechanisms.
  • FIG. 3 shows an example of opening surfaces formed as a double structure.
  • the opening surface on the front side is made larger than the opening surface on the inner side, the range corresponding to the difference in size can be made an operation range.
  • the same figure shows a state in which the opening surface on the front side is made vertically movable and the height thereof has been adjusted to lower, middle and upper stages successively from the left side.
  • the opening surface it is preferable for the opening surface to have a perforated body such as punching metal. According to this method, it is not necessary to move the body itself vertically with respect to each of the push hood and the pull hood and therefore the height adjustment can be done very easily. Besides, obstruction to the visual field can be kept to a minimum because the height of the body does not change.
  • the push hood is to be installed at an obliquely upward position for creating an obliquely downward flow.
  • the legs of the body of the push hood may be provided with a vertical adjusting mechanism or a separate table provided with a vertical adjusting mechanism may be added to the body.
  • Such a vertical adjusting mechanism may also be used for the pull hood.
  • FIG. 2 shows an example in which the body itself is endowed with a high adjusting function.
  • the push hood is composed of a push hood body 1 ′ and a base portion 6 easily separable from each other.
  • plural height adjusting holes 7 are formed vertically in both ends of a lower portion of a push hood body 1 ′ and height adjusting holes 7 ′ are formed also in both ends of the base portion 6 which is box-shaped so as to permit fitting therein of the lower portion of the push hood body 1 ′.
  • fixing members such as bolts, the push hood body 1 ′ is fixed at a predetermined height.
  • a vertically movable shielding plate be disposed on the air flow sucking opening surface.
  • This mode is shown in FIG. 4 .
  • two elongated shielding plates 8 are disposed at upper and lower ends, respectively.
  • the number of the shielding plates may be one or three or more.
  • the total area of the opening surface of the pull hood be made larger by about 10% to 30% than that of the push hood and that a part or the whole of the opening surface be closed with the shielding plate(s).
  • the material of the shielding plate(s) there may be used a shielding plate(s) of a suitable material, e.g., metallic or plastic plate(s).
  • both push hood and pull hood are disposed on both head side and foot side outside a donor body on each dissecting table and are not disposed in the longitudinal direction of the dissecting table, thus causing no obstacle to students taking practice.
  • the second embodiment of the present invention concerns a descending flow type.
  • a push hood having a uniform air flow blow-off mechanism is disposed above each dissecting table and a total of two or four pull hoods are disposed in two opposed longitudinal directions or in four longitudinal and transverse directions of the dissecting table.
  • FIG. 5 shows a typical example thereof.
  • a push hood having a uniform air flow blow-off mechanism is disposed above the dissecting table and a pair of pull hoods are disposed in the transverse direction of the dissecting table in contact with or somewhat spacedly from the dissecting table in such a manner that openings are positioned at approximately the same height.
  • each opening portion is provided with a height adjusting mechanism so that the height thereof can be adjusted in accordance with the height of the dissecting table.
  • the pull hoods disposed in the longitudinal direction there may be used a divided structure to match the length of the dissecting table.
  • a uniform air flow leaving the push hood is divided in four directions near the dissecting table, but preferably the divided flows are sucked in by four pull hoods and toxic gas such as formaldehyde gas is exhausted.
  • the pull hoods in the transverse direction may be omitted. In this case, it is preferable to lengthen the whole of each pull hood in the longitudinal direction to a sufficient extent or increase the air volume.
  • each pull hood there are installed a fan and a filter for removing toxic gas such as formaldehyde as in the first embodiment.
  • a duct for exhaust to the exterior is not needed at all.
  • the same filter as in the first embodiment be disposed in each push hood.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • Public Health (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Biomedical Technology (AREA)
  • Engineering & Computer Science (AREA)
  • General Health & Medical Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Veterinary Medicine (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Pathology (AREA)
  • Ventilation (AREA)
  • Accommodation For Nursing Or Treatment Tables (AREA)
US12/282,285 2006-03-22 2006-10-30 Toxic gas exposure preventing system for anatomic practice room Abandoned US20090156112A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2006-78035 2006-03-22
JP2006078035A JP2007252453A (ja) 2006-03-22 2006-03-22 解剖実習室用有害ガス曝露防止装置
PCT/JP2006/322062 WO2007108160A1 (ja) 2006-03-22 2006-10-30 解剖実習室用有害ガス曝露防止装置

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US (1) US20090156112A1 (ja)
EP (1) EP2002790A4 (ja)
JP (1) JP2007252453A (ja)
KR (1) KR101231753B1 (ja)
CN (1) CN101400307B (ja)
AU (1) AU2006340491B2 (ja)
CA (1) CA2646501C (ja)
WO (1) WO2007108160A1 (ja)

Cited By (3)

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US20130095743A1 (en) * 2010-06-30 2013-04-18 Koken Ltd Air blowing device
US20160209049A1 (en) * 2012-05-03 2016-07-21 Kurt Limberg Downdraft ventilation systems and methods
US11291967B2 (en) 2019-03-18 2022-04-05 Cisco Logistics, LLC Silica dust mitigation and recirculation system and associated methods

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JP5901872B2 (ja) * 2009-05-02 2016-04-13 株式会社山岸工業 病理検査室用脱臭システム
JP5787336B2 (ja) * 2010-02-17 2015-09-30 株式会社テクノ菱和 解剖台換気システム
CN102793569B (zh) * 2012-06-15 2014-09-10 中国人民解放军第四军医大学 一种防止解剖过程中甲醛对教学人员危害的装置
FR3065177B1 (fr) * 2017-04-18 2021-12-03 Osmose Dispositif d'extraction de vapeurs ou poudres toxiques et procede de mise en oeuvre
CN114576758A (zh) * 2022-03-18 2022-06-03 江西迅特环保科技有限公司 一种解剖、化妆整容室智慧云新风净化控制装置

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CN101400307B (zh) 2012-03-21
AU2006340491A1 (en) 2007-09-27
WO2007108160A1 (ja) 2007-09-27
AU2006340491B2 (en) 2012-09-06
CA2646501C (en) 2016-09-13
EP2002790A9 (en) 2009-04-15
EP2002790A4 (en) 2015-04-22
CA2646501A1 (en) 2007-09-27
EP2002790A2 (en) 2008-12-17
KR20090012213A (ko) 2009-02-02
JP2007252453A (ja) 2007-10-04
CN101400307A (zh) 2009-04-01
KR101231753B1 (ko) 2013-02-08

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