0SPC0NZ
Removal Knee Joint, Right to No Qualifier with Synthetic Substitute, Patellofemoral, Open Approach
Procedural Specifications
| Clinical Axis | Detail Definition |
|---|---|
| Section | 0 Medical and Surgical |
| Body System | S Lower Joints |
| Operation | P Removal |
| Body Part | C Knee Joint, Right |
| Approach | 0 Open |
| Device | N Synthetic Substitute, Patellofemoral |
| Qualifier | Z No Qualifier |
Operation Definition
Taking out or off a device from a body part
Procedure Overview
Removal procedures take out a device that was previously placed in a lower joint, such as internal fixation hardware, a spacer, drainage tubing, or an external fixator frame. These procedures are performed once the device has served its purpose - for example, after a fracture has healed and screws are no longer needed - or when a device is causing pain, infection, or mechanical irritation and needs to come out. Removal can be a planned, staged part of treatment or an unplanned procedure prompted by a complication.
Because the device itself, not the joint tissue, is the focus, these procedures are typically less extensive than the original surgery that placed the device, though scar tissue and bony ingrowth around older hardware can make removal technically demanding.
Anatomy & Axis Detail
Knee Joint, Right
The right knee joint is a complex hinge articulation among the femur, tibia, and patella, stabilized by an extensive network of ligaments and menisci that make it one of the most frequently instrumented joints in orthopedic surgery. Removal here refers to extracting a foreign or nonbiological substance from within the joint space - retained cement, loose hardware fragments, or debris from a prior arthroplasty, ligament reconstruction, or fracture fixation - without repairing the joint structures themselves. The knee's relatively superficial location compared to the hip makes retrieval more directly accessible, often through the same anterior or medial parapatellar approaches used in arthroplasty revision. Persistent pain, mechanical symptoms, or imaging evidence of a displaced fragment typically prompts this procedure.
Approach: Open
Open approach means the surgeon cuts through skin, mucous membrane, or other tissue layers to physically expose the target site to view before performing the procedure. It gives direct visualization and hands-on access, distinguishing it from Percutaneous approaches where instruments pass through a small puncture without exposing the site. Open is typical for procedures needing wide access, such as most laparotomies.
Device: Synthetic Substitute, Patellofemoral
A patellofemoral synthetic substitute replaces the articulating surfaces between the kneecap and the femoral trochlear groove, used for isolated patellofemoral arthritis while leaving the tibiofemoral compartments untouched. It targets a different joint surface than the unicondylar devices, which address the medial or lateral tibiofemoral compartment instead. This selective approach avoids the more extensive bone resection required for total knee replacement.
Coding & Documentation
The operative note must identify the specific device being taken out and confirm nothing is being put in its place; if a new device replaces the old one, the more specific combination root operation (such as Revision) may apply instead of a plain Removal. The body part coded is the joint from which the device is taken, using the device's original insertion site. A recurring error is coding Removal when hardware is being exchanged for a different device during the same procedure, which should instead be captured as Revision, or when the device is being taken out specifically because it failed, which some coders mistakenly still classify simply as Removal without checking whether Revision criteria are met.