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Файл:Ординатура / Хирургия / Библиотека им академика М.И. Перельмана / Книга_5512_Библиотеки_им_академика_М_И_Перельмана.pdf
Semen Analysis
Jss1
Chemical Examination
determination of acid phosphatase
Reagent
:
:
Procedure (Qualitative)
REVIEW QUESTIONS
Stool Examination
Chapter
28
Bibhas Bandy
• Introduction
■ Collection of Faecal Specimen
• Laboratory Investigation
■ Physical Examination
■ Microscopic Examination
■ Chemical Examination of Stool
• Processing of Watery Stool Specimen During Cholera Epidemic
■ Clinical Signicance and Treatment
■ Specimen Collection and Processing
■ Dispatch of Specimen for Laboratory Culture
• Laboratory Analysis
■ Laboratory Culture
■ Chemical Tests
■ Serological Reactions
• Review Questions
Stool is the waste matter discharged from bowels. Following the digestion and absorption of
essential food ingredients in the stomach and intestines, the undigested food and unabsorbed
secretions of the stomach, liver, pancreas and intestines appear in the stool. Other things
found in stool include desquamated epithelial cells from anywhere in the gastrointestinal
tract, debris of all kinds and a large bulk of bacteria. The bacteria play an important role in
bilirubin metabolism. If digestion is impaired, food remnants and water content are greatly
increased ( e.g., diarrhoea) and many of these remnants can be identied through microscopic
examination. The kind of food also affects the quantity of faecal material; vegetable, high bre
containing diet increases the amount, while a diet with a large portion of meat in it decreases
the amount of stool formation.
Stool Examination
Cnical Signiance
Laboratory examination of stool
Comprehensive Stool Analysis
quantitative faecal fat test.
Collection of Faecal Specimen
specimen is not contaminated with
urine.
Medical Laborato Technology: Volume 2
Disposing the Specimen after Examination
Physical Examination
Colour and Consistency
TABLE 28.1
Appearance
Usual cause
-
-
-
Odour
Presence of Blood, Mucous and Pus
I
Mucous
Note
Microscopic Examination
Polyvinyl alcohol
Note
trophozoites. Eggs and cysts
Caution
potentially infectious,
Wet Mount
Procedure
Caution
p
FIGURE 28.1
�
Jss1
motile trophozoites.
saline
iodine
watery stool.
low-power objective
FIGURE 28.2
meat bres.
I
Medical Laborato Technology: Volume 2
Faecal Fat
y
Stool Examination
Jssg
D Mount
°
Chemical Examination of Stool
Faecal Occult Blood Test (FOB
(Entamoeba histolytica
ago I
It
gum guaiac
Medical Laborato Technology: Volume 2
test
Guaiac occult blood test
routine screening. It
2
•
• mL/dL, v/v):
•
It