PMC7448249_01
Preoperative radiograph with isolated medial disease.
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fig1
Weight-bearing radiographs revealed severe, isolated medial compartment arthritis (Figure 1).
Acute timeline of modified two-state exchange for periprosthetic joint infection in UKA. Time not to scale.
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A timeline of his care shows his course of treatment (Figure 2).
Unicompartmental knee arthroplasty in anatomic alignment. (a) Anteroposterior radiograph. (b) Lateral radiograph.
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fig3
The patient underwent an uncomplicated right medial UKA (Figures 3(a) and 3(b)).
An articulating hemispacer fashioned from the old implants.
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fig4
Cement loaded with 2.4 grams of tobramycin and 4 grams of vancomycin was used to provisionally secure the implants, and a new polyethylene insert was placed (Figure 4).
Lab serologies over time. (a) ESR vs. days after resection. (b) CRP vs. days after resection.
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fig5
A detailed time analysis of the patient's serologies is revealing (Figures 5(a) and 5(b)).
Conversion TKA after second stage exchange. (a) Anteroposterior view. (b) Lateral view.
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fig6
Primary instrumentation was used to implant a cruciate-substituting device with a 10 mm polyethylene insert (Figures 6(a) and 6(b)).