Biomechanical analysis of ramp ambulation of transtibial amputees with an adaptive ankle foot system

Fradet, Laetitia; Alimusaj, Merkur; Braatz, Frank; Wolf, Sebastian I.

doi:10.1016/j.gaitpost.2010.04.011

Cited by 91 publications

(144 citation statements)

References 16 publications

Supporting

Mentioning

112

Contrasting

Order By: Relevance

“…In general, the evidence supporting the use of microprocessor-controlled prosthetic feet for improving balance, function, and/or mobility of people with amputation is limited and has only recently begun to appear in the literature (e.g., references [25][26][27][28][29][30]). At present, there are few English-written studies of the ProprioFoot, and those that exist have focused on socket pressures [31], hip and knee kinematics and kinetics [32][33], gait economy [34][35], and related aspects of gait [36][37] but not on MTC. Our study is the first to quantify MTC at different speeds and inclines and to report a reduced likelihood of tripping by people with TTAs.…”

Section: Discussionmentioning

confidence: 99%

“…However, older adults with faster walking speeds have been shown to fall at greater rates following a laboratory-induced trip because of greater angular momentum [47], and in the community faster walking speed is associated with greater incidence of outdoor falls [48][49] where, compared with indoor falls, tripping is more prevalent [3,50]. Third, in contrast to previous studies with the ProprioFoot, which have compared outcome variables with and without the adaptive features turned on [32][33][34], the current study employed a pseudo-crossover design. Thus, it is possible that differences in MTC may be attributed to differences in foot design that are independent of inertial differences [51][52].…”

Section: Figurementioning

confidence: 93%

See 1 more Smart Citation

Active dorsiflexing prostheses may reduce trip-related fall risk in people with transtibial amputation

et al. 2014

View full text Add to dashboard Cite

Abstract-People with amputation are at increased risk of falling compared with age-matched, nondisabled individuals. This may partly reflect amputation-related changes to minimum toe clearance (MTC) that could increase the incidence of trips and fall risk. This study determined the contribution of an active dorsiflexing prosthesis to MTC. We hypothesized that regardless of speed or incline the active dorsiflexion qualities of the ProprioFoot would significantly increase MTC and decrease the likelihood of tripping. Eight people with transtibial amputation walked on a treadmill with their current foot at two grades and three velocities, then repeated the protocol after 4 wk of accommodation with the ProprioFoot. A mixed-model, repeated-measures analysis of variance was used to compare MTC. Curves representing the likelihood of tripping were derived from the MTC distributions and a multiple regression was used to determine the relative contributions of hip, knee, and ankle angles to MTC. Regardless of condition, MTC was approximately 70% larger with the ProprioFoot (p < 0.001) and the likelihood of tripping was reduced. Regression analysis revealed that MTC with the ProprioFoot was sensitive to all three angles, with sensitivity of hip and ankle being greater. Overall, the ProprioFoot may increase user safety by decreasing the likelihood of tripping and thus the pursuant likelihood of a fall.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Figurementioning

confidence: 93%

Active dorsiflexing prostheses may reduce trip-related fall risk in people with transtibial amputation

et al. 2014

View full text Add to dashboard Cite

show abstract

“…Interestingly, the non-PVD group demonstrated an improvement in their AMPPRO scores after initial training and with the Proprio foot, which would suggest that the Proprio foot improved the function in a select group. The Proprio foot has been described in the literature as a quasipassive prosthetic ankle that can actively change the ankle angle in swing phase of level walking and ascending and descending ramps and stairs in order to improve the knee kinematics of the amputated limb during late stance and throughout the swing phase of gait [41][42][43]. Agrawal et al found that the Proprio foot promoted higher symmetry in level walking between the intact and prosthetic limb than other prosthetic feet [43].…”

Section: Discussionmentioning

confidence: 99%

Application of self-report and performance-based outcome measures to determine functional differences between four categories of prosthetic feet

Gailey

Gaunaurd

Agrawal

et al. 2012

JRRD

View full text Add to dashboard Cite

Abstract-Weand five without PVD, completed testing. Subjects were tested at baseline and after receiving training with their existing prosthesis and with the study socket and four prosthetic feet, i.e., SACH (solid ankle cushion heel), SAFE (stationary attachment flexible endoskeletal), Talux, and Proprio feet, over 8 to 10 weeks. Training was administered between testing sessions. No differences were detected by the PEQ-13, LCI, 6MWT, or SAM following training and after fitting with test feet. The AMPPRO demonstrated differences following training with the existing prosthesis in the PVD group and between selected feet from baseline testing (p

show abstract

“…Using the Proprio Foot prosthesis set in ramp mode, Fradet et al have previously observed that having a larger angle of ankle flexion during ramp ascent improved knee kinematics [13].…”

Section: Ramp Ascentmentioning

confidence: 99%

“…However, in their study, the inclination of the slope was limited to 5 percent and dynamic parameters were not estimated. On the contrary, Vickers et al [12] and Fradet et al [13] calculated both kinematic and kinetic parameters for persons with transtibial amputation compared with asymptomatic subjects. Vickers et al showed that persons with transtibial amputation reduced their speed and hip and knee flexion ranges of motion and generated less moment in the knee, particularly during descent [12].…”

Section: Introductionmentioning

confidence: 99%

Influence of physical capacities of males with transtibial amputation on gait adjustments on sloped surfaces

Langlois

Villa

Bonnet³

et al. 2014

J Rehabil Res Dev

View full text Add to dashboard Cite

Abstract-The aim of the study was to investigate how kinematic and kinetic adjustments between level and slope locomotion of persons with transtibial amputation are related to their individual muscular and functional capacities. A quantified gait analysis was conducted on flat and slope surfaces for seven patients with transtibial amputation and a control group of eight subjects to obtain biomechanical parameters. In addition, maximal isometric muscular strength (knee and hip extensors) and functional scores were measured. The results of this study showed that most of the persons with transtibial amputation could adapt to ramp ascent either by increasing ankle, knee, and hip flexion angles of the residual limb and/or by recruiting their hip extensors to guarantee enough hip extension power during early stance. Besides, 6-minute walk test score was shown to be a good predictor of adaptation capacities to slope ascent. In ramp descent, the increase of knee flexion moment was correlated with knee extensor strength and residual-limb length. However, no correlation was observed with functional parameters. Results show that the walking strategy adopted by persons with transtibial amputation to negotiate ramp locomotion mainly depends on their muscular capacities. Therefore, muscular strengthening should be a priority during rehabilitation.

show abstract

Biomechanical analysis of ramp ambulation of transtibial amputees with an adaptive ankle foot system

Cited by 91 publications

References 16 publications

Active dorsiflexing prostheses may reduce trip-related fall risk in people with transtibial amputation

Active dorsiflexing prostheses may reduce trip-related fall risk in people with transtibial amputation

Application of self-report and performance-based outcome measures to determine functional differences between four categories of prosthetic feet

Influence of physical capacities of males with transtibial amputation on gait adjustments on sloped surfaces

Contact Info

Product

Resources

About