Design of an intramedullary leg lengthening device with a shape memory actuator

A.M.M. Aalsma, Edsko E.G. Hekman, J. Stapert, H.J. Grootenboer

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

The procedure and the external fixator for lengthening long bones was developed by G.A. Ilizarov in the late 1960’s. This technique has, despite its proven abilities for leg lengthening and correction of angular deformities, some considerable disadvantages for the patients. Discomfort, infections and restricted weight bearing are some reasons for the development of a completely intramedullary device for leg lengthening. The device developed at the Laboratory of Biomechanical Engineering, University of Twente, is a telescopic intramedullary nail with a maximum diameter of 13 mm, which can be lengthened with 0.5 mm steps induced by a shape memory alloy actuator. The electrical energy for the actuator is supplied from outside the body by inductive coupling of two solenoid coils. Internally, the electrical energy is transformed to thermal energy by Thermofoils and Peltier‐elements.
Original languageUndefined
Pages (from-to)461-467
JournalTechnology and health care
Volume7
Issue number6
Publication statusPublished - 1999

Keywords

  • IR-97425
  • METIS-144389

Cite this

Aalsma, A.M.M. ; Hekman, Edsko E.G. ; Stapert, J. ; Grootenboer, H.J. / Design of an intramedullary leg lengthening device with a shape memory actuator. In: Technology and health care. 1999 ; Vol. 7, No. 6. pp. 461-467.
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abstract = "The procedure and the external fixator for lengthening long bones was developed by G.A. Ilizarov in the late 1960’s. This technique has, despite its proven abilities for leg lengthening and correction of angular deformities, some considerable disadvantages for the patients. Discomfort, infections and restricted weight bearing are some reasons for the development of a completely intramedullary device for leg lengthening. The device developed at the Laboratory of Biomechanical Engineering, University of Twente, is a telescopic intramedullary nail with a maximum diameter of 13 mm, which can be lengthened with 0.5 mm steps induced by a shape memory alloy actuator. The electrical energy for the actuator is supplied from outside the body by inductive coupling of two solenoid coils. Internally, the electrical energy is transformed to thermal energy by Thermofoils and Peltier‐elements.",
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Aalsma, AMM, Hekman, EEG, Stapert, J & Grootenboer, HJ 1999, 'Design of an intramedullary leg lengthening device with a shape memory actuator' Technology and health care, vol. 7, no. 6, pp. 461-467.

Design of an intramedullary leg lengthening device with a shape memory actuator. / Aalsma, A.M.M.; Hekman, Edsko E.G.; Stapert, J.; Grootenboer, H.J.

In: Technology and health care, Vol. 7, No. 6, 1999, p. 461-467.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Design of an intramedullary leg lengthening device with a shape memory actuator

AU - Aalsma, A.M.M.

AU - Hekman, Edsko E.G.

AU - Stapert, J.

AU - Grootenboer, H.J.

PY - 1999

Y1 - 1999

N2 - The procedure and the external fixator for lengthening long bones was developed by G.A. Ilizarov in the late 1960’s. This technique has, despite its proven abilities for leg lengthening and correction of angular deformities, some considerable disadvantages for the patients. Discomfort, infections and restricted weight bearing are some reasons for the development of a completely intramedullary device for leg lengthening. The device developed at the Laboratory of Biomechanical Engineering, University of Twente, is a telescopic intramedullary nail with a maximum diameter of 13 mm, which can be lengthened with 0.5 mm steps induced by a shape memory alloy actuator. The electrical energy for the actuator is supplied from outside the body by inductive coupling of two solenoid coils. Internally, the electrical energy is transformed to thermal energy by Thermofoils and Peltier‐elements.

AB - The procedure and the external fixator for lengthening long bones was developed by G.A. Ilizarov in the late 1960’s. This technique has, despite its proven abilities for leg lengthening and correction of angular deformities, some considerable disadvantages for the patients. Discomfort, infections and restricted weight bearing are some reasons for the development of a completely intramedullary device for leg lengthening. The device developed at the Laboratory of Biomechanical Engineering, University of Twente, is a telescopic intramedullary nail with a maximum diameter of 13 mm, which can be lengthened with 0.5 mm steps induced by a shape memory alloy actuator. The electrical energy for the actuator is supplied from outside the body by inductive coupling of two solenoid coils. Internally, the electrical energy is transformed to thermal energy by Thermofoils and Peltier‐elements.

KW - IR-97425

KW - METIS-144389

M3 - Article

VL - 7

SP - 461

EP - 467

JO - Technology and health care

JF - Technology and health care

SN - 0928-7329

IS - 6

ER -