CPT® Code 0350T

1. Indications

Radiostereometric analysis (RSA) is indicated for various clinical scenarios where precise measurement of skeletal movement or implant positioning is crucial. The following conditions and situations warrant the use of this advanced imaging technique:

• Assessment of Growth Plate Integrity RSA is utilized to evaluate the condition and stability of growth plates, which are critical for proper bone development in pediatric patients.
• Stability of Total Joint Replacement Implants This analysis helps in monitoring the stability and positioning of total joint replacement implants, ensuring that they remain correctly aligned and functional over time.
• Evaluation of Spinal Fusions RSA is employed to assess the effectiveness and stability of spinal fusions, providing insights into the healing process and the integrity of the fusion site.
• Kinematic Studies RSA is used for kinematic studies of the knee, spine, and shoulder, allowing for detailed analysis of joint movement and function during various activities.

2. Procedure

The procedure for radiostereometric analysis (RSA) involves several critical steps to ensure accurate imaging and assessment. The following outlines the procedural steps involved:

• Step 1: Patient Preparation The patient is positioned appropriately to ensure optimal imaging angles. This may involve placing the patient in a specific orientation to facilitate the capture of the required X-ray images.
• Step 2: Tantalum Bead Placement Tantalum beads are either implanted directly into the bone surrounding the implant or mounted in a fixed position to a spinal cage. This step is crucial as the beads serve as reference points for the analysis.
• Step 3: X-ray Imaging Two X-ray images are taken simultaneously from different directions. This dual imaging is essential for creating the three-dimensional representation needed for accurate analysis.
• Step 4: Image Processing The captured X-ray images are processed using specialized software that analyzes the position of the tantalum beads, allowing for the detection of any movement or changes in the position of the implant.
• Step 5: Interpretation of Results A qualified healthcare professional interprets the results of the RSA, providing insights into the stability of the implant, the integrity of the growth plates, or the effectiveness of spinal fusions.

3. Post-Procedure

After the radiostereometric analysis (RSA) procedure, patients may be monitored for any immediate reactions to the imaging process. Typically, there are no specific post-procedure care requirements, as RSA is a non-invasive imaging technique. However, patients may be advised to follow up with their healthcare provider to discuss the results of the analysis and any necessary further actions based on the findings. It is essential to ensure that the patient understands the importance of the results in relation to their ongoing treatment or monitoring plan.