Suksan TangsataphornKeerati ChareancholvanichMahidol University2018-09-132018-09-132009-10-01Journal of the Medical Association of Thailand. Vol.92, No.10 (2009), 1387-139201252208012522082-s2.0-70350452136https://repository.li.mahidol.ac.th/handle/20.500.14594/27902Paradoxical embolism is defined as venous thrombosis causing systemic embolization through a right-to-left shunt. We, herein, report a case of bilateral total knee arthroplasty and developed paradoxical embolism caused by patent foramen ovale. A sixty-two year old female had a simultaneous, total knee arthroplasty for primary osteo-arthritis. A pulmonary emboli was suspected on the thirteenth post operative day. Two days later, acute arterial insufficiency at her leg was suspected. An embolectomy and intra-operative tranesophageal echocardiogram was performed. It showed patent foramen ovale (PFO) 2-3 mm. Five days after embolectomy, she developed infarction lesion at the right occipital area. The foramen ovale was closed with a closure device nineteen days later. The patient eventually could walk using a walker. She was discharged thirty-six days after the operation.Mahidol UniversityMedicineArticleSCOPUS