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Practice Analysis of ABC Certified Assistants in the Disciplines of Orthotics and Prosthetics

May 2025

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Results Related to the Knowledge and Skills Statements

After finalizing the domains and tasks, the panel received guidance on developing knowledge statements. Working in both small and large groups, they identified industry-specific knowledge and skill areas required for the competent performance of each task. As part of this process, the panel participated in a linkage activity to ensure that each knowledge and skill statement was essential to at least one task within a domain. Some statements were linked to multiple tasks or domains, while one was removed (i.e., loss control) for not being critical across most practice settings.

In addition, the panel rated when each knowledge or skill area should be acquired for successful performance—either prior to certification or after. Most statements were determined to be necessary before certification, while those identified as acquired after certification were still considered essential, though typically required at a more foundational level. For both the COA and CPA exams, this process resulted in a final set of 44 knowledge statements and 21 skill statements. A complete list of the knowledge and skills, along with their associated linkages, can be found in Appendix C.

Orthotic Assistant Knowledge Statements

1. General musculoskeletal anatomy, including upper limb, lower limb, and spinal
2. Basic neuroanatomy (e.g., major peripheral nerves of the upper and lower extremities)
3. Anatomical landmarks (surface anatomy)
4. Anatomical planes, planes of motion, and normal joint range of motion
5. Normal human locomotion
6. Gait deviations
7. Tissue characteristics/management
8. Volumetric control (e.g., edema, weight gain/loss)
9. Biomechanics (e.g., actions of lever arms, application of force system)
10. Pathologies, including cause and progression (e.g., orthopedic, neurologic, vascular)
11. Medical terminology
12. Referral documents
13. Documentation techniques
14. Policies and procedures regarding protected healthcare information
15. Reimbursement protocols (e.g., CMS, Medicaid)
16. Material safety procedures and standards (e.g., OSHA, MSDS)
17. Universal precautions, including sterile techniques and infection control
18. Ethical standards regarding proper patient management, including ABC Code of Professional Responsibility
19. Scopes of practice related to orthotic/prosthetic credentials
20. Boundaries of the orthotic/prosthetic assistant scope of practice
21. Orthotic/prosthetic design and function
22. Orthotic/prosthetic fitting criteria
23. Orthotic/prosthetic fabrication
24. Clinical examination techniques
25. Impression-taking techniques, materials, devices and equipment
26. Rectification/modification procedures as they relate to specific orthotic/prosthetic designs
27. Measurement tools and techniques
28. Orthotic/prosthetic forms (e.g., assessment, orthometry, measurement, evaluation, outcomes)
29. Materials science
30. Componentry
31. Alignment devices and techniques
32. Hand and power tools
33. Care and maintenance of orthoses/prostheses
34. Computer-aided design and manufacturing (CAD/CAM)
35. Item warranty and warranty limitations
36. Research and literature
37. Human development and aging, ranging from pediatric to geriatric, as they relate to orthotic treatment
38. The psychology of the disabled
39. Patient educational materials
40. Federal and state rules, regulations, and guidelines (e.g., FDA, ADA, HIPAA)
41. ABC Facility Accreditation Standards
42. General insurance workflow and protocol
43. Cultural competency
44. Manufacturer guidelines

Orthotic Assistant Skill Statements

1. Communicating with patient/family/caregiver
2. Communicating with orthotists/prosthetists and other staff
3. Identifying gross surface anatomy
4. Interpretation of physical findings (e.g., recognizing skin pressures, dermatological conditions)
5. Identifying normal and pathological gait/motion
6. Impression-taking/measuring for orthoses/prostheses
7. Use of mechanical measuring devices
8. Use of electronic and computer-based measuring devices
9. Patient delineation, rectification and/or patient model modification
10. Orthotic/prosthetic fabrication
11. Use of safety equipment
12. Use of hand and power tools
13. Use of materials and components
14. Use of alignment devices
15. Aesthetic finishing
16. Evaluating fit and function of an orthosis/prosthesis
17. Adjusting and modifying orthoses/prostheses
18. Maintaining and repairing orthoses/prostheses
19. Documentation
20. Gathering quantitative and qualitative outcomes data
21. Collaborating with interdisciplinary team

 

Prosthetic Assistant Knowledge Statements

1. General musculoskeletal anatomy, including upper limb and lower limb
2. Basic neuroanatomy (e.g., major peripheral nerves of the upper and lower extremities)
3. Anatomical landmarks (surface anatomy)
4. Anatomical planes, planes of motion, and normal joint range of motion
5. Normal human locomotion
6. Gait deviations
7. Tissue characteristics/management
8. Volumetric control (e.g., edema, weight gain/loss)
9. Biomechanics (e.g., actions of lever arms, application of force system)
10. Pathologies, including cause and progression (e.g., orthopedic, neurologic, vascular)
11. Medical terminology
12. Referral documents
13. Documentation techniques
14. Policies and procedures regarding protected healthcare information
15. Reimbursement protocols (e.g., CMS, Medicaid)
16. Material safety procedures and standards (e.g., OSHA, SDS)
17. Universal precautions, including sterile techniques and infection control
18. Ethical standards regarding proper patient management, including ABC Code of Professional Responsibility
19. Scopes of practice related to orthotic/prosthetic credentials
20. Boundaries of the orthotic/prosthetic assistant scope of practice
21. Orthotic/prosthetic design
22. Orthotic/prosthetic fitting criteria
23. Orthotic/prosthetic fabrication
24. Clinical examination techniques
25. Impression-taking techniques, materials, devices and equipment
26. Rectification/modification procedures as they relate to specific orthotic/prosthetic designs
27. Measurement tools and techniques
28. Orthotic/prosthetic forms (e.g., assessment, orthometry, measurement, evaluation, outcomes)
29. Materials science
30. Componentry
31. Alignment devices and techniques
32. Hand and power tools
33. Care and maintenance of orthoses/prostheses
34. Computer-aided design and manufacturing (CAD/CAM)
35. Item warranty and warranty limitations
36. Research and literature
37. Human development and aging, ranging from pediatric to geriatric, as they relate to prosthetic treatment
38. The psychology of the disabled
39. Patient educational materials
40. Federal and state rules, regulations and guidelines (e.g., FDA, ADA, HIPAA)
41. ABC Facility Accreditation Standards
42. Manufacturer guidelines
43. General insurance workflow and protocol
44. Cultural competency

Prosthetic Assistant Skill Statements

1. Communicating with patient/family/caregiver
2. Communicating with orthotists/prosthetists and other staff
3. Identifying gross surface anatomy
4. Interpretation of physical findings (e.g., recognizing skin pressures, dermatological conditions)
5. Identifying normal and pathological gait/motion
6. Impression-taking/measuring for orthoses/prostheses
7. Use of mechanical measuring devices
8. Use of electronic or computer-based measuring devices
9. Patient delineation, rectification and/or patient model modification
10. Orthotic/prosthetic fabrication
11. Use of safety equipment
12. Use of hand and power tools
13. Use of materials and components
14. Use of alignment devices
15. Aesthetic finishing
16. Evaluating fit and function of an orthosis/prosthesis
17. Adjusting and modifying orthoses/prostheses
18. Maintaining and repairing orthoses/prostheses
19. Documentation
20. Gathering quantitative and qualitative outcomes data
21. Collaborating with interdisciplinary team