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{
    "pk": 61794,
    "title": "Posterior Knee Dislocation Following a Knee Arthroplasty",
    "subtitle": null,
    "abstract": "Total  knee  arthroplasty  is  one  of  the  most  commonly  performed  surgeries  in  the  United  States. Complications  following  knee  arthroplasty  are  uncommon,  especially  dislocations.  Knee  dislocations can be associated with popliteal artery injuries, which are potentially catastrophic and limb threatening. Emergency  Department  (ED)  physicians  should  be  familiar  with  the  management  of  knee  dislocations and complications following total knee arthroplasty. A 61-year-old female presented to the ED with acute right knee pain approximately 10 weeks after undergoing a total knee replacement for tricompartmental osteoarthritis. While at her first outpatient physical therapy evaluation, the patient felt a pop while going from  a  seated  to  standing  position.  Subsequently,  she  experienced  a  popping  sensation  and  was  unable to bear weight or extend the knee. On exam, she was in obvious pain, her surgical scar was well healed, and her knee was flexed to about 90 degrees and could not be extended. She had a palpable dorsalis pedis pulse and brisk capillary refill. Radiography revealed a posterior dislocation of her tibial prosthesis relative to her femoral prosthesis. Under procedural sedation, the dislocation was reduced and placed in a knee immobilizer. Her neurovascular exam was intact pre and post-reduction. Several months later she experienced another episode of spontaneous dislocation during a routine office visit requiring a second ED visit for reduction under procedural sedation. She was subsequently scheduled to undergo a revision of her total knee replacement due to suspected flexion instability with an inadequate extensor mechanism.",
    "language": "en",
    "license": {
        "name": "Creative Commons Attribution 4.0",
        "short_name": "CC BY 4.0",
        "text": "Attribution — You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.\n\nNo additional restrictions — You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.",
        "url": "https://creativecommons.org/licenses/by/4.0"
    },
    "keywords": [
        {
            "word": "emergency medicine, orthopedic surgery, trauma, arthroplasty, vascular"
        }
    ],
    "section": "Case Report",
    "is_remote": true,
    "remote_url": "https://escholarship.org/uc/item/3pr7x3b8",
    "frozenauthors": [
        {
            "first_name": "John",
            "middle_name": "M",
            "last_name": "Kiel",
            "name_suffix": "",
            "institution": "University of Florida College of Medicine - Jacksonville",
            "department": ""
        },
        {
            "first_name": "Michael",
            "middle_name": "",
            "last_name": "Freidl",
            "name_suffix": "",
            "institution": "Department of Orthopaedic Surgery and Rehabilitation, University of Florida College of Medicine, Jacksonville, United States",
            "department": ""
        }
    ],
    "date_submitted": "2020-10-05T14:33:03Z",
    "date_accepted": "2020-10-05T14:33:03Z",
    "date_published": "2022-01-01T00:00:00Z",
    "render_galley": null,
    "galleys": [
        {
            "label": "",
            "type": "pdf",
            "path": "https://journalpub.escholarship.org/uciem_medjem/article/61794/galley/47673/download/"
        }
    ]
}