Compartment syndrome after total knee arthroplasty: regarding a clinical case

Although compartment syndrome is a rare complication of total knee arthroplasty, it is one of the most devastating complications. It is defined as a situation of increased pressure within a closed osteofascial space that impairs the circulation and the functioning of the tissues inside this space, thereby leading to ischemia and tissue dysfunction. Here, a clinical case of a patient who was followed up in orthopedic outpatient consultations due to right gonarthrosis is presented. The patient had a history of arthroscopic meniscectomy and presented knee flexion of 10° before the operation, which consisted of total arthroplasty of the right knee. The operation seemed to be free from intercurrences, but the patient evolved with compartment syndrome of the ipsilateral leg after the operation. Since compartment syndrome is a true surgical emergency, early recognition and treatment of this condition through fasciotomy is crucial in order to avoid amputation, limb dysfunction, kidney failure and death. However, it may be difficult to make the diagnosis and cases may not be recognized if the cause of compartment syndrome is unusual or if the patient is under epidural analgesia and/or peripheral nerve block, which thus camouflages the main warning sign, i.e. disproportional pain. In addition, edema of the limb that underwent the intervention is common after total knee arthroplasty operations. This study presents a review of the literature and signals that the possible rarity of cases is probably due to failure to recognize this condition in a timely manner and to placing these patients in other diagnostic groups that are less likely, such as neuropraxia caused by using a tourniquet or peripheral nerve injury. Apesar de a síndrome de compartimento ser uma complicação rara da artroplastia total do joelho, essa constitui uma das complicações mais devastadoras. A síndrome de compartimento define-se como o aumento da pressão dentro de um espaço osteofascial fechado que compromete a circulação e a função dos tecidos dentro desse espaço e conduz à isquemia e à disfunção tecidular. Os autores apresentam um caso clínico de paciente seguida em consulta externa de ortopedia por gonartrose direita, com antecedentes de meniscectomia artroscópica e com flexão de 10° do joelho pré-operatório, que foi submetida a artroplastia total do joelho direito. A cirurgia aparentemente decorreu sem intercorrências e o pós-operatório evoluiu com síndrome de compartimento da perna ipsilateral.