title: Design and Experimental Evaluation of a Vertical Lift Walker for Sit-to-Stand Transition Assistance.
abstract: A walker capable of providing vertical lift support can improve independence and increase mobility of individuals living with spinal cord injury (SCI). Using a novel lifting mechanism, a walker has been designed to provide sit-to-stand assistance to individuals with partially paralyzed lower extremity muscles. The design was verified through experiments with one individual with SCI. The results show the walker is capable of reducing the force demands on the upper and lower extremity muscles during sit-to-stand transition compared to standard walkers. The walker does not require electrical power and no grip force or harness is necessary during sit-to-stand operation, enabling its use by individuals with limited hand function. The design concept can be extended to aid other populations with lower extremity weakness.
authors.affiliation: Department of Biomedical Engineering, Case Western Reserve University , 319 Wickenden Building. , 10900 Euclid Ave, Cleveland, OH, 44106 e-mail:  tcb9@case.edu.
authors.forename: Thomas C
authors.initials: TC
authors.lastname: Bulea
authors.forename: Ronald J
authors.initials: RJ
authors.lastname: Triolo
references.citation: J Med Eng Technol. 2004 Mar-Apr;28(2):74-80
references.pmid: 14965861
references.citation: Arch Phys Med Rehabil. 1995 Sep;76(9):876-81
references.pmid: 7668962
references.citation: IEEE Trans Rehabil Eng. 2000 Dec;8(4):514-22
references.pmid: 11204043
references.citation: Artif Organs. 1999 May;23(5):413-7
references.pmid: 10378931
references.citation: IEEE Trans Neural Syst Rehabil Eng. 2008 Oct;16(5):473-8
references.pmid: 18990650
references.citation: Clin Biomech (Bristol, Avon). 2000 Feb;15(2):123-33
references.pmid: 10627328
references.citation: IEEE Int Conf Rehabil Robot. 2011;2011:5975438
references.pmid: 22275638