Charder MS 4971 - Page 18

18
6. HOLD function can be activated before or after place the weight
on the SCALE.
4 Weighing with tare
Tare function allows the user to deduct the excess weight of a single tare object
value (additional loads or clothes) from the display reading, thus calculate the
actual net weight of the object/ person.
4.1.1 Taring
Place tare object (additional loads or clothes) on scale and
press to tare the weight of object.
 The zero display and the symbol NET appear.
 The tare weight remains stored until it is cleared.
4.1.2 Clear the tare
Press to clear tare weight
 The symbol NET disappear
 The gross weight appears in the display.
5 Weighing with BMI
For BMI calculation, height is needed, therefore it is recommended to measure the
height of subject before starting weighing procedure.
1. Switch on the scale.
2. Place object/person on the scale.
3. Press key and hold for 3 seconds. First, display will show
“HOLD” and lock weight then display show “height value”.
4. Adjust height value by using (↓) and (↑) keys.
5. Switch between digits by using (→) key.
6. Press to confirm height value.
7. Display will show “HOLD” and lock weight to calculate BMI.
BMI
Height
weight
19
Body Mass Index Categories
Classification of weight for adults over 18 years on the basis of Body Mass Index according
to WHO, 2000 EK IV and WHO 2004 (WHO - World Health Organization).
6 Weighing with BSA
- Values for Body Surface Area (BSA) is the measured or calculated surface area of a
human body. For many clinical purposes, BSA is a better indicator of metabolic mass
than body weight because it is less affected by abnormal adipose mass. BSA is
commonly used in medicine, particularly to calculate doses of chemotherapeutic
agents and index cardiac output.
Average BSA for children of various ages, for men, and for women, are taken to
be:
Age
BSA
Neonate (newborn)
0.25 m²
Child of 2 years
0.5 m²
9 years
1.07 m²
10 years
1.14 m²
12-13 years
1.33 m²
Women 1.6 m²
Men 1.9 m²
There was an average BSA of 1.73 m² for 3,000 cancer patients from 1990 to 1998
in a European Organization for Research and Treatment of Cancer (EORTC)
database.
During 2005, there was an average BSA of 1.79 m² for 3,613 adult cancer patients
in the UK. Among them, the average BSA for men was 1.91 m² and for women was
1.71 m².
However, there is some evidence that BSA values are less accurate at extremes of
height and weight, where Body Mass Index may be a better estimate.