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Necropsy-examination of an animal after it has died

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Necropsy-examination of an animal after it has died PACKAGING Clean up Necropsy: Fun at the Beach Terms Pathology study of disease Gross pathology pathologic ... – PowerPoint PPT presentation

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Title: Necropsy-examination of an animal after it has died


1
Necropsy-examination of an animal after it has
died
2
Necropsy Fun at the Beach
3
Terms
  • Pathologystudy of disease
  • Gross pathologypathologic changes seen with
    naked eye
  • Histopathologyclinical changes seen with a
    microscope
  • Lesionspathologic changes
  • Pathogenesisthe sequence of events of the
    disease (dog was bitten ? bacteria entered wound
    ? elevated temperature ? pus formed ? etc)

4
Reasons for Necropsy
  • Determine cause of death
  • Determine accuracy of clinical diagnosis
  • Evaluate effects of therapy
  • In herds, 1 or more animals may be sacrificed to
    determine the cause of disease or toxicity
  • Routine in pharmaceutical studies

5
Preliminary Steps for Necropsy
  • Obtain owners permission also determine if owner
    wants remains for burial, etc
  • Correctly identify animal (species, breed, sex,
    age, ID tags or tattoos)
  • Perform necropsy ASAP after death if delayed,
    refrigerate animal to delay autolysis DONT
    FREEZE

6
Necropsy Report
  • Location
  • Number of lesions
  • Color of abnormalities (dark red, black, etc)
  • Size of lesions (cm or weight)
  • Shape of lesion (round, flat, oval)
  • Distribution
  • Consistency (hard, soft, firm)
  • Odor (sweet, sour, ammonia)
  • Final Report tense should be consistent
  • Report should be as specific as possible without
    giving a final diagnosis unless a test for the Dx
    was performed (i.e. rabies)

7
Necropsy Facilities
8
Necropsy Protective Clothing
  • Plastic apron, lab coat, scrubs
  • latex or plastic disposable gloves
  • surgical mask if animal died from infectious
    disease spread by aerosolization
  • protective footwear

9
Necropsy Tools
  • Knives
  • Scissors
  • Tissue forceps
  • Bone-cutting tools (pruning shears, hacksaw)

10
Toxicology Samples
  • blood (10-20 ml)
  • stomach contents and urine (50-100 ml)
  • blocks of liver, fat, kidney, and brain (5x5x10
    cm approx 200 g)
  • Samples

11
Examine Exterior
12
Necropsy facility overhead hoist
13
Horse necropsy remove foreleg
14
Horse necropsy remove rib cage
15
Horse necropsy internal organs
16
Horse necropsy remove intestine
17
Horse necropsy lungs and heart
18
Horse necropsy heart
19
Horse necropsy head
20
Necropsy Videos
  • http//video.vet.cornell.edu/virtualvet/bovine/cha
    pters1-4.html

21
Esophagus
Normal
Food Ulcerations Bleeding
22
Larynx
normal
necrosis ulceration
23
Trachea
normal
necrosis ulceration
24
Pericardial sac
Click on picture to view video
25
Lungs
Normal Bronchopheumonia
Normal lung tissue -pink -spongy
Lung abscess -liquid/cottage cheese
like appearance
26
Airways and vessels
Lung artery
Lung airway
27
Normal lung tissue
28
Lung lesions
Emphysema -pops like bubble-wrap
Consolidation -heavy solid (no air)
Lung worms
Lung adhesions to ribs
Pneumonia- darker lesions are more severe
Abscesses
29
Heart R ventricle
30
Heart R side opened
31
Heart L side
32
Heart Lesions
Septal defectsconnection between R and L sides
Necrotic lesions
Valve lesions
33
Liver lesions
Liver abscesses Liver flukes
Fatty liver
Fractured liverdue to blunt trauma (knife cuts
smooth)
34
PACKAGING
35
Clean up
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