CLINICAL LAB SCIENEC

CHAPTER 7: MEDICAL ECONOMICS AND LABORATORY EQUIPMENT 177
FIGURE 7-8 Blood bank refrigerator designed
to store units of blood according to group
and type, and special units for patients with
unusual blood types or atypical antibodies.
Source: Delmar/Cengage Learning.
FIGURE 7-9 Blood donor unit to be
stored until transfused into patient
needing blood.
Source: Delmar/Cengage Learning.
(Figure 7-8). This is where units of blood and their components may be stored
(Figure 7-9) until they are ready for infusion into the patient. Some freezers are
also necessary to provide long-term storage and for supplies that might deteriorate
if thawed (Table 7-2).
Microscopes
Microscopes are delicate instruments that are used in many areas of the laboratory,
but they must be properly maintained and cared for to gain satisfaction and
accuracy from their uses (Figure 7-10). Some are extremely sophisticated, but most
are called light or bright-field microscopes, and these contain adapters that enable
them to be converted easily for dark-field and phase contrast purposes (Figure
7-11). These modifications are required for performing certain tests.
Table 7-2 Permissible Temperature Ranges for Common Laboratory
Equipment
Equipment Temperature (°C) Permissible Range (°C)
Refrigerator 6 ± 2 4 to 8
Freezer –20 ± 5 –15 to –25
Ultracold freezer –70 ± 5 –65 to –75
Microbiology incubator 36 ± 1 35 to 37
Water bath 36 ± 1 35 to 37
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