Intracapsular pressure and loosening of hip prostheses Preoperative measurements in 18 hips
| Autor: | Otto Robertsson, Hans Wingstrand, Kjell Jonsson, Uldis Kesteris, Rolf Önnerfält |
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| Rok vydání: | 1997 |
| Předmět: |
Reoperation
musculoskeletal diseases medicine.medical_specialty Osteolysis medicine.medical_treatment Distension Prosthesis law.invention Postoperative Complications law Edema Synovial Fluid Joint capsule Pressure medicine Humans Orthopedics and Sports Medicine Range of Motion Articular Aged Retrospective Studies Ultrasonography Aged 80 and over business.industry equipment and supplies medicine.disease Prosthesis Failure Surgery Radiography Pressure measurement medicine.anatomical_structure Orthopedic surgery Hip Joint Hip Prosthesis medicine.symptom business Range of motion Joint Capsule Follow-Up Studies |
| Zdroj: | Acta Orthopaedica Scandinavica. 68:231-234 |
| ISSN: | 0001-6470 |
| Popis: | We measured the intracapsular pressure preoperatively in 18 hips (17 patients) before revision of a total hip arthroplasty because of aseptic loosening. Distension of the joint capsule was measured with sonography in 13 cases. In extension, the mean intracapsular pressure was 26 (0-60) mmHg, in extension and inward rotation it was 159 (24-280) mmHg, in extension and outward rotation it was 30 (3-67) mmHg and in 45 degrees of flexion it was 12 (0-28) mmHg. A mean of 6 (0.5-20) mL of joint fluid was aspirated after the pressure measurements. Sonography showed increased joint fluid/synovial edema and/or increased capsular thickness, as compared to 34 unrevised, radiographically not loose prosthetic hips, and that the capsular distension correlated to intracapsular pressure during extension and inward rotation. We conclude that the intracapsular pressure usually is elevated in a hip joint with loose prosthetic components, that the intracapsular pressure varies with the position of the hip and that capsular distension reflects increased intracapsular pressure. The increased and often very high pressure, varying during gait, may pump debris away from the joint along the interfaces and even by itself cause osteolysis and loosening. |
| Databáze: | OpenAIRE |
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