Questions
1 question in clinical exams
Difficulty
Medium
Importance
Core topic for BPT/Medical university finals
Overview
Amputations and prosthetics represent a critical junction between surgical intervention and long-term functional rehabilitation. Understanding these concepts is essential for clinical practice to ensure residual limb health and optimal gait restoration. Aspirants must grasp the biomechanical principles behind level selection and the functional classification of modern prosthetic components.
Levels of Amputation
Amputation levels are classified based on the anatomical plane of the cut to ensure optimal healing, soft tissue coverage, and future prosthetic fit. Selection criteria prioritize preserving joint function where possible to minimize energy expenditure during ambulation.
- Trans-humeral (above elbow)
- Trans-radial (below elbow)
- Trans-femoral (above knee/AKA)
- Trans-tibial (below knee/BKA)
- Syme's amputation (ankle disarticulation)
- Lisfranc and Chopart (mid-foot amputations)
Prosthetic Types & Components
Prosthetics are sophisticated devices designed to replace lost limbs, categorized by their structural architecture and endoskeletal or exoskeletal design. Modern prescriptions are individualized based on the patient's K-level, which indicates their potential functional mobility.
- Endoskeletal (modular) vs. Exoskeletal (crustacean) designs
- Socket interfaces: Patellar Tendon Bearing (PTB) or Total Surface Bearing (TSB)
- Suspension systems: Suction, pin-lock, or vacuum-assisted
- K-Level 0-4 classification system
- SACH foot (Solid Ankle Cushion Heel)
Rehabilitation Principles
Rehabilitation following amputation is a multidisciplinary process that spans pre-operative education to long-term community reintegration. It focuses on physical conditioning, desensitization of the residual limb, and gait training to prevent secondary compensations.
- Immediate Post-Operative Prosthetic (IPOP) fitting
- Shrinker sock application for residual limb shaping
- Contracture prevention: Hip flexion in AKA and knee flexion in BKA
- Core stabilization and contralateral limb strengthening
- Proprioceptive neuromuscular facilitation (PNF)
Formula Sheet
Energy Expenditure = (O2 cost of gait / velocity) * body mass
K-Level 0-4 (0=non-ambulator, 4=high-impact athlete)
Exam Tip
Always link the choice of prosthetic component (e.g., SACH foot vs. Energy storage foot) to the patient's K-level functional ability to score higher on clinical reasoning questions.
Common Mistakes
- Confusing the specific gait deviations associated with BKA versus AKA amputations.
- Ignoring the critical importance of residual limb desensitization before full prosthetic weight-bearing.
- Misinterpreting the K-level classification system for functional prescription.
More Revision Notes
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