FIXATION: 2. METALLIC FIXATIVES

FIXATION: 2. METALLIC FIXATIVES
15問 • 1年前
  • Chasny Halasan
  • 通報

    問題一覧

  • 1

    Most common metallic fixative

    Mercuric Chloride (HgCl2)

  • 2

     HgCl2 + potassium dichromate + glacial acetic acid

    Zenker’s

  • 3

    HgCl2 + potassium dichromate + strong formalin (40%)  For piituitary gland, BM, blood-containing organs, preserves cytoplasmic granules  Brown pigments are removed with saturated alcoholic picric acid or NaOH

    Zenker-formol/Helly’s

  • 4

     Skin tumor biopsy

    Heidenhain Susa

  • 5

     BM biopsies

    B5 Fixative

  • 6

     Precipitates all proteins, and preserves carbohydrates

    Chromic acid

  • 7

     P: chromatin, mitochondria, mitotic figures, golgi bodies, RBC and colloid-containing TSEs  DADV: prolonged fixation may lead to blackening of tissue pigment [Remedy: Wash in running tap water before dehydration]

    Regaud’s/Muller’s

  • 8

    early degenerative processes and necrosis, demonstration of Rickettsia and other bacteria  E: preserves myelin

    Orth’s

  • 9

    preserves lipids, mitochondria, at pH4.5-5.2, cytoplasm, chromatin and chromosome are fixed  Corrosive, thus avoid skin contact

    3% Potassium dichromate

  • 10

     P: for acid mucopolysaccharides and mucin

    4% Aqueous Lead

  • 11

     Routine fixative of choice for preservation of cell detail in tissue photography

    Mercuric Chloride (HgCl2)

  • 12

    PENETRATES AND HARDENS TISSUE RAPIDLY

    Mercuric Chloride (HgCl2)

  • 13

    penetrates and hardens tissue rapidly

    Mercuric Chloride (HgCl2)

  • 14

     Good general fixative for adequate preservation of all kinds of tissues

    Zenker’s

  • 15

     Good for Trichrome staining

    Zenker’s

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    問題一覧

  • 1

    Most common metallic fixative

    Mercuric Chloride (HgCl2)

  • 2

     HgCl2 + potassium dichromate + glacial acetic acid

    Zenker’s

  • 3

    HgCl2 + potassium dichromate + strong formalin (40%)  For piituitary gland, BM, blood-containing organs, preserves cytoplasmic granules  Brown pigments are removed with saturated alcoholic picric acid or NaOH

    Zenker-formol/Helly’s

  • 4

     Skin tumor biopsy

    Heidenhain Susa

  • 5

     BM biopsies

    B5 Fixative

  • 6

     Precipitates all proteins, and preserves carbohydrates

    Chromic acid

  • 7

     P: chromatin, mitochondria, mitotic figures, golgi bodies, RBC and colloid-containing TSEs  DADV: prolonged fixation may lead to blackening of tissue pigment [Remedy: Wash in running tap water before dehydration]

    Regaud’s/Muller’s

  • 8

    early degenerative processes and necrosis, demonstration of Rickettsia and other bacteria  E: preserves myelin

    Orth’s

  • 9

    preserves lipids, mitochondria, at pH4.5-5.2, cytoplasm, chromatin and chromosome are fixed  Corrosive, thus avoid skin contact

    3% Potassium dichromate

  • 10

     P: for acid mucopolysaccharides and mucin

    4% Aqueous Lead

  • 11

     Routine fixative of choice for preservation of cell detail in tissue photography

    Mercuric Chloride (HgCl2)

  • 12

    PENETRATES AND HARDENS TISSUE RAPIDLY

    Mercuric Chloride (HgCl2)

  • 13

    penetrates and hardens tissue rapidly

    Mercuric Chloride (HgCl2)

  • 14

     Good general fixative for adequate preservation of all kinds of tissues

    Zenker’s

  • 15

     Good for Trichrome staining

    Zenker’s