OCS Cheat Sheet 2026

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

1. Which of the following best describes the McKenzie classification of 'derangement syndrome' in lumbar assessment? → Pain that centralizes with repeated movements in one direction
2. A patient has a positive Ober's test with limited hip adduction in sidelying. This finding suggests tightness of which structure? → Iliotibial band and tensor fasciae latae
3. A patient reports taking gabapentin for neuropathic pain after lumbar surgery; this medication acts by blocking which ion channel? → Voltage-gated calcium channels
4. Following a total knee arthroplasty (TKA), which ROM milestone should a patient typically achieve by discharge from acute care? → 0-90° flexion
5. Topical diclofenac gel is used in orthopedic practice primarily for which purpose? → Local NSAID delivery with reduced systemic side effects for superficial joint pain
6. NSAIDs reduce pain and inflammation primarily by inhibiting which enzyme? → Cyclooxygenase (COX)
7. Which quality improvement method is most applicable to quality assurance & performance improvement in Orthopedic Certified Specialist? → Plan-Do-Check-Act (PDCA) continuous improvement cycle
8. What is the significance of peer review in evidence-based practice & research methods for OCS professionals? → It promotes accountability, knowledge sharing, and quality improvement
9. A patient with chronic Achilles tendinopathy is beginning rehabilitation. Which loading protocol has the strongest evidence base? → Eccentric heel drops on a decline board
10. A 45-year-old with adhesive capsulitis is in the freezing phase. Which intervention is most appropriate? → Pain-free ROM and modalities for pain control
11. What is the primary purpose of evidence-based practice & research methods in the context of Orthopedic Certified Specialist? → To ensure consistent quality and professional accountability
12. Which of the following best describes a key competency required for evidence-based practice & research methods in OCS certification? → Critical thinking and evidence-based decision making
13. Which precaution is most critical for a patient in the first 6 weeks after anterior cruciate ligament (ACL) reconstruction using a patellar tendon autograft? → Avoiding combined knee flexion with tibial internal rotation and valgus stress
14. A clinician applies a valgus stress at 30° of knee flexion and detects medial joint gapping without a firm endpoint. This finding indicates: → Complete MCL rupture
15. A runner develops medial tibial stress syndrome (shin splints). Which initial conservative intervention is most appropriate? → Relative rest, activity modification, and load management
16. During a hip examination, a positive FADDIR test (Flexion, ADDuction, Internal Rotation) is MOST associated with: → Femoroacetabular impingement
17. How does continuing education relate to professional ethics & legal compliance for OCS certified professionals? → It ensures professionals stay current with evolving standards and best practices
18. A patient 6 weeks post-SLAP repair is cleared to begin active-assisted ROM. Which motion should be introduced LAST due to greatest risk of re-injury? → External rotation at 90° abduction
19. Which of the following is a post-operative care technique used to prevent contractures in the lower extremities after hip surgery? → Passive range-of-motion exercises and proper positioning
20. Which clinical finding best indicates that a patient's lumbar stabilization exercise program should progress from Stage I (supine) to Stage II (quadruped)? → Ability to maintain neutral spine during lower extremity loading in supine
21. What is a common challenge professionals face when applying quality assurance & performance improvement principles in Orthopedic Certified Specialist? → Balancing theoretical knowledge with practical application
22. Which strengthening exercise best targets the gluteus medius in isolation to address Trendelenburg gait? → Sidestepping with a resistance band around the ankles
23. Which modality is typically used for managing chronic tendinopathy? → Ultrasound therapy and eccentric exercises
24. Which proprioceptive exercise progression is most appropriate for a patient in early ACL reconstruction rehabilitation (weeks 2–6)? → Single-leg balance on a foam pad with eyes open, progressing to eyes closed
25. A patient exhibits a Trendelenburg gait pattern during single-leg stance on the right. Which structure is MOST likely dysfunctional? → Right hip abductors
26. Which surgical approach for total hip arthroplasty (THA) generally requires posterior hip precautions to prevent dislocation? → Posterior approach
27. Which special test is most sensitive for detecting a posterior cruciate ligament (PCL) injury? → Posterior drawer test at 90° flexion
28. What is the most common test for assessing rotator cuff tears? → Empty Can Test
29. Which nerve is most at risk during anterior surgical approach to the hip (Smith-Petersen approach)? → Lateral femoral cutaneous nerve
30. According to the Ottawa Ankle Rules, which finding indicates the need for ankle radiographs? → Inability to bear weight both immediately after injury and in the clinic