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Subcutaneous joint-mouse escape during knee-joint arthroscopy
1University Hospital of Aarhus, Department of Orthopaedic Surgery, Aarhus Municipal Hospital, Denmark.
Abstract:
During arthroscopy of the knee, large volumes of fluid are required. Cadaver studies have indicated that flexion of the knee may cause rupture of the joint capsule during arthroscopy. To illustrate this, a rare case is presented with rupture of the posterior part of the capsule during arthroscopy with extrusion of a joint mouse. This possibility should be considered when the joint mouse cannot be found inside the joint during arthroscopy.
Insights
Knee arthroscopy fluid can cause joint capsule rupture, especially with knee flexion. Surgeons should consider posterior capsule rupture if a joint mouse is lost during the procedure.
Area of Science:
- Orthopedic Surgery
- Knee Arthroscopy
- Joint Biomechanics
Background:
- Knee arthroscopy requires significant fluid distension for visualization.
- Cadaver studies suggest knee flexion during arthroscopy may compromise joint capsule integrity.
Observation:
- A rare case of posterior capsule rupture during knee arthroscopy is presented.
- A "joint mouse" (loose body) was extruded from the joint following the rupture.
Findings:
- Knee flexion during arthroscopy can lead to joint capsule rupture.
- Extrusion of intra-articular structures like joint mice can occur through capsule defects.
Implications:
- This complication should be considered in knee arthroscopy, particularly if intra-articular objects are not visualized.
- Awareness of potential capsule rupture aids in surgical planning and complication management during knee arthroscopy.