Prosthesis (i.e. – artificial body members) – parts thereof – or ai – Leg – Adjustable shank or thigh
Patent
1996-10-29
1998-09-01
Willse, David H.
Prosthesis (i.e., artificial body members), parts thereof, or ai
Leg
Adjustable shank or thigh
623 27, 623 44, A61F 262, A61F 264, A61F 276
Patent
active
058005650
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a leg prosthesis, in particular, to device in form of a test prosthesis for testing various combinations of the possible members of the prosthesis and their adaptation to the anatomical conditions. A prosthesis for a thigh amputated person, i.e. for a person having the leg amputated above the knee, conventionally comprises a thigh member, a lower leg member with a foot member, a joint and a swing phase control device, whereby the thigh member is pivotally connected to the lower leg member through the joint. The swing phase control device comprises a first link part and a second link part, whereby the first link part is connected to the thigh member and the second link part is connected to the lower leg member.
Various kinds of lower leg members, foot members, swing phase control devices, stand phase securing devices, etc. having different characteristics which must be adapted to the requirements of the thigh amputated person and secondly having different prices are available for such kinds of prosthesis. The anatomical conditions of various persons are different and a prosthesis for a thigh-amputated person must therefore be additionally adapted to the corresponding anatomical conditions. For a purpose of selecting the various members of such a prosthesis and adapting to the requirements and the anatomical conditions of the thigh amputated person it is necessary to test various combinations of the possible members and their adaptation to the anatomical conditions of the thigh amputated person.
This causes for example the problem that the various swing phase control devices and/or stand phase securing devices have different overall sizes and/or connection possibilities and connection requirements, that the various lower leg members and feet are formed in very different manner just because of their different characteristics and that the replacement of various components of a prosthesis is therefore often impossible or requires a high expense. Thus, the selection of the correct prosthesis including the necessary testing of the various components is very difficult and expensive.
It is the object of the present invention to provide a test prosthesis which allows a combination of various components of a prosthesis in an easy manner.
This object is achieved by a test prosthesis having a thigh member (6), a lower leg member (7), a joint (4) connecting both members, and a knee part (1), characterized in that the knee part is connected to the thigh member or to the lower leg member, respectively, through a connection unit (8) allowing connection of the thigh member with a relative movement between the connected members in a direction inclined with respect to the leg axis.
Further embodiments of the invention are defined in the subclaims.
The design of a knee member according to an embodiment allows a replacement of the swing phase control device which does not effect the respective other components connected to the knee member. Hence, the exchange necessary for selecting the correct swing phase control device is easily possible. Further, the lower leg member can be connected to the foot member or the thigh member can be connected to the knee part or with the lower or upper knee member, respectively, without effecting the respective other components. This also results in an easy exchange of the corresponding members in a manner independent of the other members used in the test prosthesis. The adjustment device of the connection unit allows an adjustment of the position of the thigh member relative to the upper knee member and thus an adjustment of the position of the thigh member relative to the other members used if required by the exchange of the other members.
Further features and advantages of the invention will be apparent from the description of embodiments with reference to the figures. In the figures:
FIG. 1 is a schematical representation of various members of the test prosthesis;
FIG. 2 is a different representation of various members of a second embodiment of the test prosthesis; a
REFERENCES:
patent: 3538516 (1970-11-01), Bailey
patent: 3551915 (1971-01-01), Woodall
patent: 3671978 (1972-06-01), May
patent: 4536898 (1985-08-01), Palfray
patent: 4883494 (1989-11-01), Cooper
patent: 5047063 (1991-09-01), Chen
patent: 5171325 (1992-12-01), Aulie
patent: 5181931 (1993-01-01), van de Veen
patent: 5529576 (1996-06-01), Lundt et al.
Biedermann Motech GmbH
Neuner George W.
Willse David H.
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