BackThe NAVISURG ShellPull™ System is designed to remove artificial hip acetabular components quickly, safely, and with maximum preservation of the pelvic bone. The system features a centering rod, multi-size femoral heads, and curved hemispherical cutting blades that gently separate the interface between bone and cup while minimizing damage. A fixed handle and specialized design enhance precision and reduce the risk of injury to surrounding soft tissues and anatomical structures. This set streamlines revision hip arthroplasty procedures, particularly in cases where bone preservation is essential for future reconstruction.
1. Product Information
- Product Name: NAVISURG ShellPull™ System
- Device Owner / Brand Owner: NOVAMED GLOBAL JOINT STOCK COMPANY
- Country of Origin: Vietnam
- Indication: Designed to assist in the removal of acetabular components during revision hip arthroplasty, particularly when maximal bone preservation is required.
2. Product Description
The instrument set is designed to remove acetabular components quickly, safely, and with maximum bone preservation.
System components include:
- Stem: Aligned directly on the femoral head to keep the instrument centered and minimize slippage from the acetabulum.
- Femoral Head: Available in two sizes: 28 mm / 32 mm.
- Cutting Blades: Six interchangeable blades with curved surfaces mimicking the acetabular hemisphere, allowing gentle separation at the bone–cup interface.
- Handle: Fixed handle for stable operation.
3. Indications for Use
The product is intended for:
- Removal of acetabular components in revision hip arthroplasty.
- Loosened, aseptic, or infected acetabular cups; recurrent dislocations.
- Preservation of maximal pelvic bone for subsequent implantation of a new acetabular component.
4. Contraindications
Do not use in cases of:
- Excessively damaged acetabular components with insufficient structure for centering.
- Uncontrolled acute infection at the surgical site.
- Patients unsuitable for anesthesia or surgery.
- Damaged or deformed instruments.
5. Intended Users
- Qualified orthopedic surgeons
- Trained surgical assistants and medical instrument technicians
- Usage environment: Sterile, standard-compliant operating room
6. Performance Features & Key Advantages
- Maximum bone preservation: The instrument separates the bone–cup interface with minimal hammering, reducing pelvic bone damage.
- Curved cutting blades: Mimic the acetabular hemisphere for easier cup removal.
- Precise centering: The femoral head guide ensures the blade follows the correct arc, minimizing miscuts or bone injury.
- Specialized design: Reduces the risk of injury to soft tissue, nerves, and surrounding structures.
→ Optimizes surgical workflow and patient outcomes.
7. Usage Procedure
Summary of procedure:
- Select the appropriate femoral head size for the acetabulum.
- Align the instrument stem on the femoral head for stable centering.
- Use the cutting blade to create an initial groove around the acetabular rim.
- Carefully separate the bone–cup interface.
- Remove the acetabular component and inspect the remaining bone surface.
- Clean and evaluate the bone structure to prepare for the new acetabular implant.
8. Storage & Sterilization
- Sterilizable by steam autoclaving according to standard protocols.
- Clean immediately after surgery to avoid debris accumulation.
- Check blade sharpness and curvature before reuse.
- Store in a dry place and avoid strong impacts.
9. Warnings
- To be used only by qualified orthopedic surgeons.
- Ensure precise centering before cutting to avoid bone damage.
- Do not use worn, bent, or deformed cutting blades.
- For cemented or heavily sclerotic acetabula, carefully assess before operation.