CPO Cheat Sheet 2026

The 30 highest-yield CPO facts, distilled from real exam questions. Print it, save it as a PDF, or study it here — free, no sign-up.

1. During static alignment of a transtibial prosthesis, the socket should be set in how many degrees of initial flexion to promote stable loading? → 5–10° of flexion
2. What is the primary goal of patient evaluation? → Assess the patient's needs, functional abilities, and anatomical conditions
3. Which technology trend is most likely to impact professional ethics & legal compliance in the CPO field in coming years? → Digital tools for enhanced data collection, analysis, and reporting
4. When taking a comprehensive patient history, which psychosocial factor has the greatest evidence-based impact on prosthetic rehabilitation outcomes? → Patient motivation and self-efficacy beliefs
5. The 'Otto Bock alignment system' and similar dynamic alignment methods assess prosthetic socket position primarily by evaluating: → Ground reaction force vector relative to joint centers during walking
6. What ethical consideration is most relevant to evidence-based practice & research methods in CPO practice? → Maintaining confidentiality and acting in the best interest of stakeholders
7. What ethical consideration is most relevant to communication & interprofessional collaboration in CPO practice? → Maintaining confidentiality and acting in the best interest of stakeholders
8. Which of the following is a contraindication for the use of a rigid ankle-foot orthosis (AFO)? → Significant pitting edema with fluctuating limb volume
9. Which thermoplastic material is most commonly used for low-temperature custom orthotic fabrication due to its workability at approximately 60–70°C? → Low-temperature thermoplastic (e.g., Orfit, Aquaplast)
10. Which documentation practice is most important for quality assurance & performance improvement in the CPO field? → Maintaining complete, accurate, and timely records
11. In upper limb prosthetics, body-powered hooks vs. myoelectric hands differ primarily in that myoelectric devices: → Use EMG signals from residual limb muscles to control the terminal device
12. Which resin system requires a peroxide catalyst and is known for lower cost and higher shrinkage during the lamination of prosthetic sockets? → Polyester resin
13. What is a common challenge professionals face when applying evidence-based practice & research methods principles in Certified Prosthetist Orthotist? → Balancing theoretical knowledge with practical application
14. How should the patient be educated about the use of their device? → To ensure proper use and maintenance
15. What is the role of padding in prosthetic fitting? → Provides cushioning and secure fit
16. The Shore A hardness scale is commonly used in prosthetics and orthotics to characterize which type of material? → Elastomers and soft liner materials (silicone, urethane)
17. What does cadence refer to in clinical gait analysis? → Number of steps taken per unit time
18. When fabricating a custom AFO for a patient with mild spastic equinovarus, the trim lines should be: → Posterior to the malleoli to provide maximum rigidity
19. A patient with a transfemoral amputation experiences medial distal thigh pain during the stance phase. The most likely cause is: → Insufficient adduction of the socket
20. Which of the following best describes a key competency required for evidence-based practice & research methods in CPO certification? → Critical thinking and evidence-based decision making
21. What ethical consideration is most relevant to professional ethics & legal compliance in CPO practice? → Maintaining confidentiality and acting in the best interest of stakeholders
22. Which type of ankle-foot orthosis would be MOST appropriate for a patient with spastic equinovarus foot and moderate spasticity? → Solid ankle AFO with dorsiflexion assist trim line
23. What is the primary purpose of evidence-based practice & research methods in the context of Certified Prosthetist Orthotist? → To ensure consistent quality and professional accountability
24. Which spinal orthosis is most appropriate for a stable L1 compression fracture requiring immobilization without neurological involvement? → TLSO (thoracolumbosacral orthosis)
25. What is the role of CAD/CAM technology in orthotic design? → Enable precise and customized design and fabrication
26. When documenting a patient's functional outcome at a 6-month follow-up, which standardized tool is most appropriate for lower limb prosthetic users? → Timed Up and Go (TUG) test
27. What is the significance of the 'LT' and 'RT' modifiers in O&P billing? → They indicate left side and right side of the body for bilateral specificity
28. Which of the following best describes the purpose of a relief in a prosthetic socket over a bony prominence? → To reduce pressure concentration over sensitive areas
29. Which technology trend is most likely to impact quality assurance & performance improvement in the CPO field in coming years? → Digital tools for enhanced data collection, analysis, and reporting
30. A 45-year-old patient with a transtibial amputation and K3 activity classification is being fit for the first time. Which foot category is most appropriate? → Energy-storing/returning (dynamic response) foot