Worksheetscos jan 2025
Total questions: 10
Worksheet time: 5mins
A 75 years old patient presents with the painful right total hip replacement that was performed 2 years ago and as always remained painful. Blood tests and a joint aspirate was performed. Select the minimum criteria for diagnosis of a periprosthetic joint infection in this scenario.
A. Synovial WBC count > 3000 cells/ μl, with both ESR and CRP elevated
B. Synovial WBC count > 10000 cells/ μl, with both ESR and CRP elevated
C. Synovial WBC count > 15000 cells/μl, with both ESR and CRP elevate15
D. Synovial WBC count > 15000 cells/μl, with either ESR and CRP elevated
A 78 years old male sustained a fall after two years of THR. What is the type of this fracture and the management?
A. Vancouver type B2 and stem revision
B. Vancouver type B2 and ORIF
C. Vancouver type B3
and stem revision
D. Vancouver type B3
and ORIF
Identify this person and his contribution to orthopedics
A. Kulzer - Patented the mechanism for polymerizing PMMA at room temperature
B. Themistokles Gluck - Used a plaster and colophony cement to fix a total knee prosthesis made of ivory
C. Otto Röhm -Developed PMMA
D. Degussa- Patented the mechanism for polymerizing PMMA at room temperature
Which of the following statement is false?
A.1985: The Unimation Puma 200, an industrial robot, was used in a brain biopsy
B. 1992: The ROBODOC system was used for total hip replacements
C. 1987 - NeuroMate® is one of the oldest running systems commercially available to perform variousneurological procedure
D. 1987 - The CASPAR system was the first used for total hip replacement
When cementing a femoral stem as per current thinking, what is the most likely cause for severe hypotension related to " bone cement implantation syndrome"?
A. Anaphylaxis to PMMA molecules
B. Multiple emboli
C. Metabolites of the monomer entering the circulation and vasodilatation
D. Exothermic effect
Which of the following is not an expected finding in THR in Paget's disease?
A. Valgus femoral neck
B. Acetabular protrusion
C. More blood loss
D. High cardiac output
An 80 years old pt C/O groin pain of 18 months following THR. O/E pain reproduced with resisted hip flexion. No E/O in infection in blood workup. Radiographs are normal apart from a retroverted cup. The most appropriate next step is
A. Triphasic bone scan
B. Steroid injection into Iliopsaoas bursa
C. Aspiration of hip joint
D. Proceed to cup revision
Which Artery is most likely to cause uncontrollable bleeding in posterior approach to hip
A. inferior gluteal
B. superior gluteal
C. Ascending br of Lat circumflex Femporal A
D. Pudental
9. Regarding Freeman-Swanson bi-compartmental knee prosthesis the true statement is
A. First bicompartmental knee arthroplasty without a hinge for stabilization was the Polycentric Knee
B. Medial and lateral tibial compartments were resurfaced separately
C. First bicompartmental knee arthroplasty using a hinge with intramedullary stems.
D. SAV Swanson was a Professor of Mechanical Engineering
10. A 75 years old patient with long standing painful TKR. According to the international consensus meeting ( ICM) for periprosthetic joint infection, which criterion if present alone is considered diagnostic of periprosthetic infection?
A. Positive histology analysis of periprosthetic tissue
B. Raised ESR & CRP
C. Raised synovial WBC count or ++ change on leucocyte esterase test strip
D. Two positive periprosthetic culture with phenotypically identical organisms
