Otto Bock Defender Instructions For Use Manual page 12

The product is recommended for mobility grade 2 (restricted
outdoor walker), mobility grade 3 (unrestricted outdoor walker)
m°
kg
and mobility grade 4 (unrestricted outdoor walker with particu­
larly high demands).
The following table shows the suitable spring stiffness of the prosthetic foot
for the patient's body weight.
Body weight [kg]
2.3 Environmental conditions
Storage and transport
Temperature range –20 °C to +60 °C (–4 °F to +140 °F), relative humidity 20 % to
90 %, no mechanical vibrations or impacts
Allowable environmental conditions
Temperature range: –10 °C to +45 °C (14 °F to 113 °F)
Chemicals/liquids: fresh water, salt water, perspiration, urine, soapsuds, chlorine
water
Moisture: Submersion: max. 1 h in 3 m depth, relative humidity: no restrictions
Solids: Dust, occasional contact with sand
Clean the product after contact with humidity/chemicals/solids, in order to
avoid increased wear and damage (see page 17).
Unallowable environmental conditions
Solids: Highly hygroscopic particles (e.g. talcum), continuous contact with sand
Chemicals/liquids: Acids, continuous use in liquid media
2.4 Lifetime
Prosthetic foot
Depending on the patient's activity level, the maximum lifetime of the product
is 3 years.
12
Spring stiffness relative to body weight
9 to 13
14 to 18
19 to 22
23 to 27
28 to 31
32 to 36
37 to 45
Spring stiffness
1P
2P
3P
4P
5P
6P
1A (adult)