FECES AND OTHER BODY FLUIDS Flashcards

(73 cards)

1
Q

Clinical significance of fecal analysis

A

Early detection of gastrointestinal bleeding
Liver and biliary duct disorders
Maldigestion or malabsorption syndromes
Inflammation
Causes of diarrhea
Identification of pathogenic bacteria and parasites

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2
Q

Normal fecal specimen composition

A

Water
Bacteria
Cellulose
Other undigested food stuffs
Gastrointestinal secretions
Bile pigments
Cells from the intestinal walls
Electrolytes

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3
Q

Final breakdown and reabsorption elements

A

Ingested proteins
Carbohydrates
Fats

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4
Q

Final breakdown and reabsorption site

A

Small intestine

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5
Q

Digestive enzymes elements

A

Trypsin
Chymotrypsin
Amino peptidase
Lipase

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6
Q

Digestive enzymes are secreted by the

A

Pancreas into the small intestines

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7
Q

Bile salts that help in fat digestion are provided by the

A

Liver

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8
Q

Any deficiency of the substances will result to [?] and the excess undigested or an absorbed material will [?]

A

Malbsorption or maldigestion
Appear in feces

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9
Q

The large intestine is capable of absorbing

A

~3000 mL or 3 L of water

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10
Q

Exceeds 3000 mL or 3 L of water

A

Diarrhea

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11
Q

When the fecal materials this a long time in the large intestine, it provides time for the additional water to be reabsorbed

A

Constipation

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12
Q

Brown color of the thesis results from the intestinal oxidation of [?] to [?], also from [?] to [?]

A

Stercobilinogen to Urobilin
Stercobilin to Hydrobilin

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13
Q

Increase in daily stool weight above 200 grams with increased liquidity and frequency of more than three times per day

A

Diarrhea

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14
Q

Diarrhea is classified according to

A

Duration of illness
Mechanism

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15
Q

(< 4 weeks)

A

Acute diarrhea

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16
Q

(> 4 weeks)

A

Chronic diarrhea

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17
Q

Increased secretion of water due to enterotoxin-producing organisms

A

Secretory diarrhea

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18
Q

E. coli, Clostridium, V. cholera, salmonella, shigella, staphylococcus, campylobacter, protozoa, and parasites such as cryptosporidium

A

Secretory diarrhea

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19
Q

Drugs
stimulant laxatives
hormones
inflammatory bowel disease (Chron disease, ulcerative colitis
lymphocytic colitis, diverticulitis)
endocrine disorders
neoplasms
collagen vascular disease

A

Secretory diarrhea

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20
Q

Where absorption due to incomplete breakdown (maldigestion) or reabsorption of food (malabsorption) which exerts osmotic pressure across the intestinal mucosa

A

Osmotic diarrhea

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21
Q

Causes:

Disaccharidase deficiency (lactose intolerance)
Malabsorption (celiac sprue)
Poorly absorbed sugars (lactose, sorbitol, mannitol)
Laxatives
Magnesium containing antacids
Amoebiasis
Antibiotic administration

A

Osmotic diarrhea

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22
Q

Fecal osmotic gap

A
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23
Q

Osmotic gap
Stool Na
pH
(-) reducing substances
Common fetal tests

A
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24
Q

Osmotic gap
Stool Na
pH
(-) reducing substances
Common fetal tests

A
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25
Increase stool fat that exceeds 6 grams per day
Steatorrhea
26
Due to pancreatic insufficiency or disorders or to absence of bile salts
Steatorrhea
27
May also be present in malabsorption and maldigestion and can be distinguished by d xylose test
Steatorrhea
28
If d xylose is low, steatorrhea is caused by
Malabsorption
29
Causes of malabsorption
Bacterial overgrowth Intestinal resection Celiac disease Tropical sprue Lymphoma Whipple disease Giardia lamblia infestation Chron disease Intestinal ischemia
30
A normal d-xylose indicates
Pancreatitis
31
Feces appear [?] in consistency and have a very [?]
Pale, greasy, bulky, spongy, or pasty Strong odor
32
Collect in a clean container and transferred to the laboratory container
33
Specimen must not be contaminated with urine or toilet water
34
Types of fecal specimen
Random FOBT 3 day or 72 hour
35
Collected in a plastic or glass containers and suitable for qualitative testing of blood and microscopic examination of leukocytes, muscle fibers, and fetal fats
Random
36
Material collected on physician's glove and applied to filter paper in occult blood testing
FOBT
37
Collected in large containers for quantitative fecal fat testing
3 day or 72 hour
38
Types of preservation
Physical Chemical
39
Regeneration
Physical preservation
40
Containers that contain preservatives for ova and parasites must not be used to collect specimens for other tests
Chemical preservation
41
Chemical preservatives
Formalin 95% ethanol Glycerol in NSS, MIF, PVA
42
Normal physical examination values for fecal analysis Quantity: Color: Consistency; Odor: pH:
Quantity: 100 to 200 grams per day Color: light to dark brown Consistency: soft to well formed Odor: foul to offensive pH: 7.0 - 8.0
43
Pathologic: biliary obstruction/post-hepatic obstruction
Clay-colored or gray, pale, yellow or white, acholic
44
Non pathologic: barium sulfate
Clay-colored or gray, pale, yellow or white, acholic
45
Blood (bright red from lower GI bleeding)
Red
46
Beets
Red
47
Food dyes
Red
48
Drugs
Red
49
Blood (black, tarry from upper GI bleeding)
Black
50
Iron therapy
Black
51
Charcoal ingestion
Black
52
Bismuth
Black
53
Green vegetables
Green
54
Biliverdin
Green
55
ingestion or enema
Clay-colored or gray, pale, yellow or white, acholic
56
Rifampin
Red
57
BSP dye
Red
58
Medications and suppositories
Black
59
During antibiotic therapy
Green
60
Diarrhea
Watery
61
Pea-soup: typhoid fever
Watery
62
Rice-water: cholera
Watery
63
Constipation
Hard, small, round
64
Intestinal construction or narrowing
Narrow, ribbon-like, flattened, slender
65
Steatorrhea consistency
Bulky, frothy, greasy, spongy, and may float
66
Constipation or excessive straining due to the defecation
Mucus-coated
67
Pathologic: Collitis, Chron's disease, colon tumors
Mucus-coated
68
Bacterial or amoebic dysentery
Blood-streaked mucus
69
Malignancy
Blood-streaked mucus
70
Upper gastrointestinal bleeding site
From esophagus, stomach, or duodenum (small intestine)
71
Upper gastrointestinal bleeding color
Black, tarry
72
Lower gastrointestinal bleeding site
From colon (large intestine) or rectum
73
Lower gastrointestinal bleeding color
Bright red