Standing pressure distribution for normal and below-knee amputee children

Area of Science:

• Biomechanics
• Pediatric orthopedics
• Prosthetics

Background:

• Children with below-knee (BK) amputation possess distinct morphologies compared to typically developing children.
• This morphological difference may lead to atypical limb loading during standing in amputee children.
• Understanding pressure distribution is crucial for assessing prosthetic effectiveness and child development.

Purpose of the Study:

• To investigate and compare the standing ground-shoe pressure distribution between children with below-knee (BK) amputation and normal children.
• To identify potential differences in weight-bearing patterns during static standing.

Main Methods:

• Utilized a pressure plate system to quantify ground-shoe weight distribution.
• Recruited a cohort of three BK amputee children and ten normal children for the study.
• Collected data during standing posture for all participants.

Main Results:

• No significant difference was observed in the medial-lateral weight distribution between the prosthetic/non-prosthetic limbs of BK children and the feet of normal children.
• A significant difference was found in the anterior-posterior weight distribution for both prosthetic and non-prosthetic feet of BK children compared to normal children.
• These findings indicate altered anterior-posterior loading patterns in BK amputee children.

Conclusions:

• While medial-lateral balance appears comparable, BK amputee children exhibit distinct anterior-posterior weight distribution during standing.
• Further research with larger sample sizes is required to fully elucidate the clinical implications (benefits, detriments, or irrelevance) of these observed pressure distribution differences.
• Quantifying these biomechanical variations is essential for optimizing prosthetic design and gait training for pediatric amputees.