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This systematic review by Andreas Kannenberg et al. explores the advantages of microprocessor-controlled knees (MPKs) for limited community ambulators, specifically those with Medicare Functional Classification Level-2. The study analyzes data from six relevant publications with 57 subjects and highlights potential benefits such as reduced falls, improved fall risk indicators, and enhanced walking performance on different terrains.
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Benefits of microprocessor-controlled prosthetic knees to limited community ambulators: Systematic review Andreas Kannenberg, MD, PhD; Britta Zacharias, Dipl-Ing (FH); Eva Pröbsting, Dipl-Ing (FH), CPO
Aim • Review literature to determine potential benefits of microprocessor-controlled knees (MPKs) for limited community ambulators (Medicare Functional Classification Level [MFCL]-2). • Relevance • Benefits of MPKs are well established in community ambulators (MFCL-3) with transfemoral amputation (TFA).
Method • Searched 10 scientific databases for clinical trials with MPKs. • Identified six relevant publications with 57 subjects with TFA and MFCL-2 mobility grade. • Rated methodological quality using criteria from Cochrane Review on prosthetic components. • 4 studies = moderate. • 2 studies = low.
Results • MPK use may significantly: • Reduce uncontrolled falls up to 80%. • Improve indicators of fall risk. • Performance-based outcome measures suggest that MFCL-2 ambulators using MPKs may walk: • 14%–25% faster on level ground. • 20% quicker on uneven surfaces. • 30% faster when descending a slope.
Conclusion • Trial fittings may be used to determine whether or not individuals with TFA and MFCL-2 mobility grade benefit from MPK use. • Criteria for patient selection and assessment of trial fitting success or failure are proposed.