3
2- PATIENT POPULATION, ACTIVITY LEVEL, WEIGHT
LIMITATIONS
Target patient population
Lower limb amputees, both transfemoral and transtibial.
The device is for single patient use.
The device is indicated for medium to high activity level (K3 and K4 activity levels; can
be beneficial also for high K2).
Activity Level K2: single speed cadence, with the ability to traverse low level
environmental barriers. Typical of the limited community ambulator.
Activity Level K3: variable cadence, with the ability to traverse most
environmental barriers. May have vocational, therapeutic, or exercise activity
that demands prosthetic utilization beyond simple locomotion.
Activity Level K4: variable cadence, with the ability for prosthetic ambulation
that exceeds basic ambulation skills, exhibiting high impact, stress, or energy
levels.
Maximum patient weight
Do not exceed the weight limit indicated in the chart below. Risk of device failure.
Lifting and carrying loads. Verify that the accumulated weight (p loads) does
not exceed the weight limit indicated in the chart below.
SIZE
(cm)
Activity K2
Low
Activity K3
Medium
Activity K4
High
BioStep CL
BioStep PRO
22-24
113 kg / 250 lbs
101 kg / 224 lbs
101 kg / 225 lbs
25-30
183 kg / 405 lbs
183 kg / 405 lbs
147 kg / 325 lbs
BioStep XT
22-30
152 kg / 335 lbs
140 kg /310 lbs
120 kg / 265 lbs
BioStep EVO
22
113 kg / 250 lbs
102 kg / 224 lbs
90 kg / 200 lbs
23-24
125 kg / 275 lbs
113 kg / 250 lbs
102 kg / 224 lbs
25-30
158 kg / 350 lbs
147 kg / 325 lbs
125 kg / 275 lbs
BioStep LP
22-24
100 kg/221 lbs
88 kg/194 lbs
77 kg /177 lbs
25-30
165 kg/365 lbs
147 kg/324 lbs
130 kg/287 lbs
