How long is the service life of artificial limb?

To understand the service life of artificial limbs, we need to understand two basic concepts:

Load value and loading frequency

"Load value" refers to the theoretical value of external forces (torsion, torque, tension, shear force, axial force, etc.) that a carrier (prosthetic joint or component) must bear according to relevant standards (national or international standards).

"Loading frequency" refers to the maximum number of times that a carrier (prosthetic joint or component) will not be deformed or damaged when it continuously and intermittently bears the load value. The loading frequency of prosthetic joints or parts is one million times according to the national standard; The international standard is 3 million times.

There is a direct relationship between the life of prosthesis and loading frequency. From the data of loading frequency, the service life of prosthesis products produced by enterprises that meet international standards such as ISO9001, CE and EN46001 should be three times that of domestic prosthesis products. It is neither objective nor practical to describe the life span of artificial limbs simply by the number of years.

The life span of artificial limb is related to the quality, maintenance, using method, age, weight, constitution, working environment and activity of the user, which is the embodiment of comprehensive data. Therefore, it is reasonable to use loading frequency to describe the life of prosthesis.

SHIJIAZHUANG AOSUO O&P