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Digital Subtraction Air Arthrography: An Innovative Technique for Needle Tip Location Confirmation
Jeremiah R Long1, Jens T Verhey2, William F Sensakovic1
1Mayo Clinic Arizona, Phoenix, AZ.
Current Problems in Diagnostic Radiology
|June 9, 2020
Summary
This study introduces a new method using digital subtraction fluoroscopy and air to confirm needle placement in joints. This technique proved effective and safe for joint injections, offering a valuable option for clinicians.
Area of Science:
- Medical Imaging
- Interventional Radiology
- Orthopedics
Background:
- Accurate needle tip positioning is crucial for effective intra-articular injections.
- Traditional methods for confirming needle placement can be limited.
Purpose of the Study:
- To describe and evaluate an innovative technique for confirming intra-articular needle tip positioning using digital subtraction fluoroscopy with air.
Main Methods:
- Digital subtraction fluoroscopy with air was used to confirm needle placement in 12 joints.
- Procedural details, including fluoroscopy time and patient demographics, were recorded.
- Radiation dose differences were compared between techniques using shoulder and hip phantoms.
Main Results:
- All 12 injections were technically successful, with air clearly visualized in the target joints.
- Subjective pain ratings remained stable or decreased post-injection.
- The digital subtraction technique increased radiation dose compared to standard fluoroscopy.
Conclusions:
- Fluoroscopic digital subtraction air arthrography is a valuable tool for confirming needle tip position using air contrast.
- This technique is a novel combination of established methods and is adaptable to clinical practice.
