US20050270642A1 - Microscope slide cover with integrated reservoir - Google Patents

Microscope slide cover with integrated reservoir Download PDF

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Publication number
US20050270642A1
US20050270642A1 US10/518,478 US51847805A US2005270642A1 US 20050270642 A1 US20050270642 A1 US 20050270642A1 US 51847805 A US51847805 A US 51847805A US 2005270642 A1 US2005270642 A1 US 2005270642A1
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US
United States
Prior art keywords
cover
cavity
fluid
substrate
reaction chamber
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
US10/518,478
Other languages
English (en)
Inventor
Andrew McLellan
George Goris
Chester Henderson
Jonathan Mckinlay
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.)
Leica Biosystems Melbourne Pty Ltd
Original Assignee
Vision Biosystems 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
Application filed by Vision Biosystems Ltd filed Critical Vision Biosystems Ltd
Assigned to VISION BIOSYSTEMS LIMITED reassignment VISION BIOSYSTEMS LIMITED ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MCKINLAY, JONATHAN, HENDERSON, CHESTER, GORIS, GEORGE, MCLELLAN, ANDREW
Publication of US20050270642A1 publication Critical patent/US20050270642A1/en
Priority to US12/561,468 priority Critical patent/US8337786B2/en
Priority to US13/683,452 priority patent/US9128300B2/en
Abandoned legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B21/00—Microscopes
    • G02B21/34—Microscope slides, e.g. mounting specimens on microscope slides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
    • B01L3/50—Containers for the purpose of retaining a material to be analysed, e.g. test tubes
    • B01L3/508—Containers for the purpose of retaining a material to be analysed, e.g. test tubes rigid containers not provided for above
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L9/00—Supporting devices; Holding devices
    • B01L9/52—Supports specially adapted for flat sample carriers, e.g. for plates, slides, chips
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2300/00—Additional constructional details
    • B01L2300/02—Identification, exchange or storage of information
    • B01L2300/021—Identification, e.g. bar codes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2300/00—Additional constructional details
    • B01L2300/04—Closures and closing means
    • B01L2300/041—Connecting closures to device or container
    • B01L2300/045—Connecting closures to device or container whereby the whole cover is slidable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2300/00—Additional constructional details
    • B01L2300/08—Geometry, shape and general structure
    • B01L2300/0809—Geometry, shape and general structure rectangular shaped
    • B01L2300/0822—Slides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2400/00—Moving or stopping fluids
    • B01L2400/04—Moving fluids with specific forces or mechanical means
    • B01L2400/0403—Moving fluids with specific forces or mechanical means specific forces
    • B01L2400/0406—Moving fluids with specific forces or mechanical means specific forces capillary forces
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N35/00—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
    • G01N35/00029—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor provided with flat sample substrates, e.g. slides
    • G01N2035/00099—Characterised by type of test elements
    • G01N2035/00138—Slides
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T436/00—Chemistry: analytical and immunological testing
    • Y10T436/25—Chemistry: analytical and immunological testing including sample preparation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T436/00—Chemistry: analytical and immunological testing
    • Y10T436/25—Chemistry: analytical and immunological testing including sample preparation
    • Y10T436/2575—Volumetric liquid transfer

Definitions

  • the present invention relates to a cover for a substrate, and in one form a cover for use with a microscope slide.
  • Microscope slides are commonly used to view samples of material under a microscope.
  • the samples may contain human tissue, and may require treatment such as staining, so that properties of the sample can be identified.
  • Other materials such as DNA, RNA, or proteins may be included on the slide.
  • a cover for a substrate including:
  • the cavity extends the full width of a sample holding region on the substrate.
  • a protrusion extends from the projection, to assist in wicking fluid into the reservoir.
  • the reservoir is defined between the projection, which is spaced from the substrate, and legs located at sides edge of the cover.
  • the projection is formed front two sections, the first section is angled at least at substantially 60° relative to the cavity and the second section is angled at least at substantially 15°.
  • the cover further includes a second reservoir, at an opposite end of the cover.
  • wall portions are located at the edge of the cover, surrounding the cavity on two or more sides.
  • the legs extend along the sides of the cover to form the wall portions.
  • the cover includes a locator for controlling and locating the cover, the locator being arranged at an end of the cover opposite the projection.
  • the cavity extends to an end edge of the cover adjacent the locator.
  • the cover is supported on the substrate by the wall portions.
  • the cover is made from a polymer material.
  • the cavity includes a coating of reduced surface roughness than the polymer material.
  • the cavity includes a coating with reduced porosity.
  • the cavity has one or more coatings.
  • a first coating is a material having similar properties to the material of the slide.
  • the first coating is silicon dioxide.
  • a second coating is placed intermediate a first coating to provide improved contact properties between the cover and first coating.
  • the cover has associated wing structures that allow the cover to be engaged and pivoted relative to the substrate so as to open the reaction chamber and allow the slide to be cleared of fluid.
  • a combination of a substrate and a cover as described above, wherein the cavity of the cover is arranged to face the substrate so as to form a reaction chamber.
  • a method of treatment of a sample on a sample holding region of a substrate including locating a cover, as described above, over the substrate, so that the cavity of the cover faces the substrate to form a reaction chamber over the sample holding region, and depositing fluid into the fluid reservoir to allow the fluid to be drawn into the reaction chamber, as required.
  • the method further includes sliding the cover relative to the substrate to vary a degree of overlap between the cover and the sample holding region, which results in a corresponding variation in the reaction chamber volume.
  • the method further includes sliding the cover relative to the substrate until wing structures associated with the cover are engaged and lifted relative to the substrate to pivot the cover into an open condition, and allow fluid to drain from the reaction chamber.
  • FIG. 1 shows an example of a microscope slide
  • FIGS. 2 ( a )-( c ) show top, side and bottom views of a first example of a cover for a slide
  • FIG. 3 shows a perspective view of the cover of FIG. 2 ;
  • FIGS. 4 ( a )-( c ) show farther views of the cover of FIG. 2 located on the slide of FIG. 1 ;
  • FIG. 5 is a perspective view of the cover and slide arrangement of FIG. 4 , showing a cutaway section of the cover;
  • FIG. 6 shows a schematic cross section of the cover and slide of FIG. 5 ;
  • FIG. 7 shows a perspective view of a tray adapted to locate covers and slides
  • FIGS. 8 ( a ) and ( b ) show schematic top and sectional side views, respectively, of a further example of a cover
  • FIGS. 9 ( a ) and ( b ) show schematic top and sectional side views, respectively, of a further example of a cover
  • FIGS. 10 ( a ) and ( b ) show schematic top and sectional side views, respectively, of a further example of a cover
  • FIGS. 11 ( a ) and ( b ) show schematic top and sectional side views, respectively, of a further example of a cover
  • FIGS. 12 ( a ) and ( b ) show schematic top and sectional side views, respectively, of a further example of a cover
  • FIGS. 13 ( a ) and ( b ) shows schematic top and sectional side views, respectively, of a further example of a cover
  • FIGS. 14 ( a ) and ( b ) show top and bottom perspective views, respectively, of a further example of a cover
  • FIG. 15 shows a schematic side view of a nose portion of a cover
  • FIG. 16 ( a ) and ( b ) show schematic top and sectional side views, respectively, of a further example of a cover
  • FIG. 17 shows a schematic side view of a further example of a nose portion of a cover
  • FIG. 18 shows the cover of FIG. 2 mounted to the tray of FIG. 7 ;
  • FIGS. 19 ( a )-( c ) shows the cover of FIG. 2 in various positions over the slide of FIG. 1 ;
  • FIGS. 20 ( a ) and ( b ) show a bottom perspective view and enlarged partial perspective view, respectively of a modified cover.
  • a microscope slide 1 is shown in FIG. 1 as including an upper surface 2 containing a sample 3 .
  • the slide 1 is identified by a unique bar code 4 .
  • the sample 3 such as a thinly sliced tissue section, is located on the slide 1 in a sample holding region 5 , which needs to be covered by a cover, such as shown in FIG. 2 , for subsequent application of test fluids and the like.
  • FIGS. 2 ( a )-( c ) and FIG. 3 show a cover 10 as having a body 12 , a fluid receiving zone 14 , a locating means 16 and a cavity 18 on an underside face 19 .
  • a wall portion 20 Surrounding the cavity 18 on two sides is a wall portion 20 .
  • the wall portion 20 joins with legs 21 which extend upwardly and away from the face 19 .
  • the legs 21 are spanned by a projection 13 which defines a fluid reservoir 17 , between an underside of the projection and the legs 21 .
  • the cover 10 is shown fitted to a slide 1 in FIGS. 4 and 5 .
  • the fluid reservoir 17 is shown roost clearly in FIG. 4 ( c ) where a detailed view of part of a section A-A taken across the cover 10 and slide 1 is illustrated.
  • the projection 13 with leg 21 at either end, is raised relative to the slide 1 , to form a volume capable of holding fluid dispensed onto the slide 1 .
  • fluid reservoir 17 enables fluid dispensed onto slide 1 to be held until required, without spilling off an edge of the slide.
  • the projection 13 further assists in spreading the fluid across the full width of the cavity
  • the overlap of the cavity 18 with the slide 1 forms what may be described as a reaction chamber, as illustrated in FIG. 6 .
  • the cavity may vary according to application, typically from 20-200 microns.
  • the wall portion 20 is adapted to support the cover on the slide 1 .
  • the cavityed face 22 , wall portion 20 and sample holding region 5 of a slide 1 form a reaction chamber 24 when the cover 10 is placed at least partially over the sample holding region 5 .
  • the fluid reservoir 17 is typically sized to be larger than the volume of the reaction chamber 24 , for example 150% of the volume of the reaction chamber. This provides sufficient volume of fluid to fill the reaction chamber completely, while allowing some excess to flush the chamber, and an amount to be retained in the fluid reservoir to provide a reservoir for evaporation.
  • Clamping forces may also be applied to the cover once loaded onto the slide, and these forces are designed to provide a seal between the wall portions 20 and the upper surface of the slide 1 . This is to restrict fluid leakage from the side of the cover.
  • the wall portions may have an additional member to assist sealing of the wall portions with the upper surface 2 of the slide 1 . This additional member may be a softer polymer or rubber material.
  • the cover 10 also includes engaging surfaces in the form of wings 26 .
  • the wings 26 are adapted to engage ramps 28 of a tray 21 shown in FIG. 7 , to thereby lift the cover clear of the surface of the slide 1 .
  • An example of the wings lifting the cover free is shown more clearly in FIG. 18 .
  • the cover 10 may be controlled by an arm (not shown) moving the locating means 16 .
  • the cover 10 may be placed in a number of positions over the slide, exemplified by the positions of the cover relative to the slide shown in FIG. 19 . In FIG. 19 ( a ), the cover 10 is in an open position relative to the slide 1 , as the sample is exposed and open.
  • FIG. 19 ( b ) shows the cover in a partially closed position
  • reaction chamber 19 ( c ) shows the cover in a fully closed position, where the sample is completely covered by the cover and is therefore wholly contained within the reaction chamber 24 .
  • the reaction chamber formed by the cover and cavity 18 extends over most of the slide 1 . However it is possible that the sample may be placed more towards the end of the slide distal from the bar code 4 , and therefore a smaller reaction chamber 24 is required. Reducing the size of the reaction chamber 24 reduces the amount of fluid required to fill the chamber, which can be important where expensive or scarce fluids are used. It is possible to form a smaller reaction chamber with the cover 10 , by only covering a porion of the slide 1 with the cover 10 . This position is shown in FIG. 18 ( b ).
  • FIGS. 8-17 Variations in cover constructions are schematically shown in FIGS. 8-17 .
  • FIGS. 8-17 only the front segments of the covers are shown, and the locating means 16 have been omitted from view for clarity and like parts are denoted by like reference numerals.
  • a cover 10 is shown having a body 12 , projecting legs 21 , a protruding section 13 and an indent 30 .
  • the projecting legs 21 either side of the body 12 form a fluid receiving zone 14 .
  • fluid may be dispensed into the fluid receiving zone, where it spreads in a circular fashion to contact the protruding section 13 .
  • the indent 30 allows the fluid to contact a wider portion of the protruding section 13 than if the front edge of the protruding section was straight (as shown in FIG. 9 ). Once the fluid is in contact with the protruding section 13 , it wicks across the width of the cavity 18 .
  • the fluid begins to fill the cavity 18 .
  • the cavity 18 forms the reaction chamber 24 as the fluid may react with the sample 3 .
  • FIGS. 9 ( a ) and ( b ) show a more simple construction of a cover 10 that may be used in some circumstances.
  • the operation of the cover 10 is the same as the operation of the cover 10 in FIGS. 8 ( a ) and ( b ).
  • FIG. 10 s ( a ) and ( b ) show a cover 10 having a body 12 with projecting legs 21 .
  • a protruding section 13 and a bar 31 surround a fluid receiving zone 14 for receiving fluid.
  • the fluid may be dispensed onto the protruding section 13 , where it flows down and onto the slide surface 2 .
  • the protrusion 13 and bar 31 cause the fluid to spread across the width of the cavity 18 , enabling the cavity to be filled with fluid.
  • the covers are generally 25 mm across, and the cavity 18 is typically only 20-200 micrometres high. As such, overall fluid dispense volumes may be in the order of 20-300 microlitres.
  • FIG. 13 ( a ) shows another cover 10 having a body 12 , legs 21 and a fluid dispenser 100 dispensing fluid 102 onto the slide 1 .
  • the fluid 102 has already been dispensed, and has formed a fluid reservoir in the fluid reservoir 17 .
  • the schematic Figure shows a typical wicking pattern formed by the fluid as it contacts the cover 1 .
  • the fluid is just being dispensed onto the projection 13 .
  • the fluid forms a pool of comparable size to some of the cover features.
  • the fluid may be drawn into the cavity further by movement of the cover over the slide or suction applied to the rear of the cavity 18 .
  • FIG. 14 ( a ) and ( b ) shows a further embodiment of a cover 10 where like reference numerals are again used to denote like ports.
  • the cover has a fluid reservoir 17 , a projection 13 , and a protrusion in the form of nib 15 . Fluid may be deposited directly On the nib 15 so that the fluid rolls over the projection 13 into reservoir 14 , and to the cavity 18 , as required. If fluid is placed too far ahead of the cover, there are circumstances that may cause the fluid to reach the edge of the slide before wicking across the width of the cavity 18 . It has been found that using the projection 13 causes the dispensed fluid to contact the covertile and spread along the full width of the cavity 13 , due to the positive attraction of the covertile and the fluid.
  • the capillary forces in the cavity cause the fluid to spread out, and the reservoir holds sufficient fluid to ensure that fluid dispensed onto the slide at least fills the cavity 18 .
  • the nib 15 is useful in that if the pipette is not placed to dispense the fluid accurately onto the slide, and for example misses a few millimetres in front of the projection, the nib 15 will be likely to contact the fluid, which will be drawn to the protrusion and into the reservoir. This assists in reducing bubble or void formation within the cavity.
  • the nib 15 may extend approximately 1-5 mm from the projection 13 .
  • FIG. 17 shows an example of how fluid spreads across a slide when deposited in front of a cover 50 .
  • a variety of profiles for the underside of a projection 15 may be employed.
  • a cover 10 is placed on a slide 1 , as shown in FIGS. 4, 5 and 6 to cover the sample 3 .
  • the slide 1 will typically be in a tray 21 as shown in FIG. 7 , said tray 21 able to hold, for example, 10 slides and covers of the examples shown.
  • the tray 21 may then be placed into a biological reaction apparatus, such as that disclosed in Australian Provisional Patent Application No. PS3114/02 by the same applicant, titled “Method and Apparatus for Providing a Reaction Chamber”, filed 20 Jun. 2002, and its associated international patent application, filed 20 Jun. 2003, the contents of which are hereby incorporated by reference.
  • the slides 1 are held in position, typically at an angle of 5 degrees to the horizontal as shown schematically in FIG. 13 ( b ), 15 or 17 .
  • the cover 10 is then moved by an arm (not shown) engaging the locating means 16 .
  • the cover 10 is moved longitudinally along the surface of the slide 1 until the sample 3 is exposed.
  • a fluid is then dispensed by a dispensing means 100 such as a probe attached to a pump, onto the fluid receiving zone 13 (as shown in FIG. 13 ( b )).
  • the amount of fluid dispensed is typically sufficient to fill the reaction chamber 24 .
  • the use of the cover 10 with this fill mechanism or methodology allows a small volume of fluid to be uniformly distributed across the reaction chamber 24 . Distributing the fluid across the reaction chamber 24 evenly and without bubbles or air spaces allows reactions to take place on the sample 3 with greater consistency. Also, dispensing fluid into an empty receiving zone where the reaction chamber already contains fluid causes the fluid within the chamber to be replaced by the fluid in the receiving zone minimising mixing of the fluid in the reaction chamber and newly dispensed fluid.
  • the dimensions of the reaction provide a smooth flow of fluid from the reaction chamber such that there is little mixing of the fluids. This is advantageous as it allows a previous fluid to be replaced accurately, with minimal original fluid remaining to contaminate later fluids or reactions. This reduces the number of washes required to clear the reaction chamber 24
  • the volume of fluid in a reaction chamber 24 may be, for example 150 microlitres or less, although volumes may vary depending on the application and the reaction chamber dimensions.
  • the reaction chamber 24 is able to retain fluid due to the surface tension of the fluid, unless additional fluid is added to the fluid receiving zone, or suction is applied (typically through reduced air pressure) at the end of the slide opposite the fluid receiving zone.
  • the reaction chamber may be filled as it is formed by the cover 10 being moved along the surface of the slide 1 to cover the sample holding region 52 .
  • the reaction chamber may be filled without the cover being moved relative to the slide, due to the process of capillary wicking of dispensed fluid into the reaction chamber.
  • the cover may be clamped to the slide when not in motion or retracted for an initial fill.
  • the clamping mechanism places force around the edge of, for example, cover 10 adjacent the wall portions 20 to locate the cover 10 with respect to the slide 1 during a reaction.
  • Parts of the cover may have different material properties compared to the properties of the material of the cover body 12 , which is typically plastic.
  • the cavity may have different material properties, in order to provide a reaction chamber 24 with certain material properties.
  • a clear plastic material has been found to be suitable for the body 12 of the cover 10 , to provide suitable mechanical properties such as reasonable strength and rigidity.
  • the cover needs to be sufficiently strong to be moved while clamping forces are applied to the cover, as the clamping forces assist in providing a sealing surface between the walls 20 of the cover 10 and the upper surface of the slide 1 .
  • the cover may be moved to empty or fill the chamber, or also, to promote fluid movement within the reaction chamber to assist a reaction.
  • the cover should ideally have some flexibility, as it is desirable that upon application of the clamp, the cavityed face should deflect somewhat. This has been found to assist in moving the fluid within the reaction chamber and therefore increases the exposure of the sample to the fluid.
  • cover 10 Other properties of the cover 10 include the ability to restrict the heat loss from the surface of the slide 1 .
  • the slide will be mounted on a heated block, and the cover will be placed over the sample on the slide. Heating the slide heats the sample and the fluid in the reaction chamber. If there is excessive heat loss from the cover 10 it is difficult to regulate the temperature of the fluid by beating the slide 1 . Further, there may be an excessive temperature gradient across the reaction chamber 24 , which is undesirable.
  • the cavityed face 19 may have different surface properties to the rest of the cover. It has been found to be desirable to have similar material properties for the upper surface of the slide 2 and the cavity 18 . In one example, it is possible to coat the surface of the cavity with a material, such as silicon dioxide. This coating may be approximately 110 nm thick. The coating provides a surface with material properties similar to that of a glass slide. It has also been found that there are benefits in applying a thin layer (for example 0.5-6 nm) of Chromium Oxide (Cr2O3) to the cavity before applying the silicon dioxide layer. This application of an intermediate layer between the silicon dioxide and plastic provides better adhesion and better thermal expansion properties for the cavity.
  • a material such as silicon dioxide. This coating may be approximately 110 nm thick. The coating provides a surface with material properties similar to that of a glass slide.
  • Cr2O3 Chromium Oxide
  • coatings in general may be used to improve the flatness of the cavity (which reduce nucleation sites and therefore bubble formation at high temperatures).
  • the coatings may be used to modify the capillary flow characteristics of the fluid within the reaction chamber, create an impermeable barrier for gas or liquid between the cover and fluid in the reaction chamber, or provide a chemically inert surface.
  • the covers shown in the examples may be used at temperatures approaching 100 degrees Celsius, especially when used for in-situ hybridisation reactions. At higher temperatures, the fluid evaporates and bubbles are produced. The heating may also cause the cover to bow—the cavity surface is hotter than the top of the cover and expands more, causing the cavity surface to ‘sag’ towards the slide. This helps to remove the bubbles, as the fluid wants to occupy the smaller spaces more than the bubbles do. The bubbles congregate at the ends of the cavity, and must be allowed to escape.
  • the existing reservoir 17 can be redesigned as illustrated in FIG. 20 , where a modified cover 60 , similar to that shown in FIG. 14 , is shown with a chamfer 61 to assist in releasing bubbles, without affecting the even fluid flow through the cavity 18 .
  • the chamfer forms a first angled section 62 at about 60° relative to the cavity and slide surface.
  • Fluid evaporation rate is, however, directly linked to the surface area of the fluid exposed to atmosphere—a larger surface area will evaporate faster, and require more frequent replenishment. If the bubble escape angle is steep, the evaporation rate will increase.
  • This problem can be overcome by using two angles—a shallow angled section at, say, 15° between the cavity and the chamfer, to minimise evaporation, leading into the steeper angle for bubble release, which also serves to increase the volume of the reservoir.
  • the cover 60 is also provided with a second, identically shaped reservoir 63 at an opposite end thereof.
  • the second reservoir 63 can also be used to replenish fluid within the cavity during heating and to allow bubbles to escape.
  • the second reservoir 63 thereby allows for increased control of fluid conditions within the reaction chamber.
  • FIGS. 14 and 20 are considered to represent what is currently believed to be the best known method of performing the cover aspect of the invention.

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • Clinical Laboratory Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • General Health & Medical Sciences (AREA)
  • Hematology (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Microscoopes, Condenser (AREA)
US10/518,478 2002-06-20 2003-06-20 Microscope slide cover with integrated reservoir Abandoned US20050270642A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US12/561,468 US8337786B2 (en) 2002-06-20 2009-09-17 Microscope slide cover with integrated reservoir
US13/683,452 US9128300B2 (en) 2002-06-20 2012-11-21 Microscope slide cover with integrated reservoir

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AUPS3090 2002-06-20
AUPS3090A AUPS309002A0 (en) 2002-06-20 2002-06-20 A covertile for a substrate
PCT/AU2003/000778 WO2004001389A1 (en) 2002-06-20 2003-06-20 Microscope slide cover with integrated reservoir

Related Child Applications (1)

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US12/561,468 Division US8337786B2 (en) 2002-06-20 2009-09-17 Microscope slide cover with integrated reservoir

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US20050270642A1 true US20050270642A1 (en) 2005-12-08

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US10/518,478 Abandoned US20050270642A1 (en) 2002-06-20 2003-06-20 Microscope slide cover with integrated reservoir
US12/561,468 Expired - Lifetime US8337786B2 (en) 2002-06-20 2009-09-17 Microscope slide cover with integrated reservoir
US13/683,452 Expired - Lifetime US9128300B2 (en) 2002-06-20 2012-11-21 Microscope slide cover with integrated reservoir

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US12/561,468 Expired - Lifetime US8337786B2 (en) 2002-06-20 2009-09-17 Microscope slide cover with integrated reservoir
US13/683,452 Expired - Lifetime US9128300B2 (en) 2002-06-20 2012-11-21 Microscope slide cover with integrated reservoir

Country Status (7)

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US (3) US20050270642A1 (ru)
EP (1) EP1514088B1 (ru)
JP (2) JP4708018B2 (ru)
CN (1) CN100342973C (ru)
AU (1) AUPS309002A0 (ru)
CA (1) CA2492061C (ru)
WO (1) WO2004001389A1 (ru)

Cited By (19)

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EP1872850A1 (en) 2006-06-28 2008-01-02 Jeol Ltd. Microchip
US20090139311A1 (en) * 2007-10-05 2009-06-04 Applied Biosystems Inc. Biological Analysis Systems, Devices, and Methods
WO2009074154A2 (en) 2007-12-10 2009-06-18 Dako Denmark A/S A tissue processing apparatus
US20100178695A1 (en) * 2004-06-30 2010-07-15 Sysmex Corporation Specimen preparation apparatus, specimen preparation/analysis system and specimen plate
US20110170094A1 (en) * 2008-03-21 2011-07-14 Eppendorf Ag Cuvette, Insert, Adapter and Method for Optically Examining Small Amounts of Liquid
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US20100002293A1 (en) 2010-01-07
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CN100342973C (zh) 2007-10-17
US8337786B2 (en) 2012-12-25
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EP1514088A1 (en) 2005-03-16
WO2004001389A1 (en) 2003-12-31

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