Arthroscopy - Square bite cutting pliers - blue pliers - shovel-shaped bite cutting pliers - Straight type - Specification - 4.5mm x 120mm

Based on the specifications of arthroscopic instruments described in previous contexts, here is the English technical description of the requested device:

**Arthroscopic Square Jaw Biopsy Forceps (Blue Clamp) - Shovel-shaped Biter - Straight Type - 4.5mm×120mm**  

**1. Functional Design**  

- **Primary Application**: Designed for minimally invasive joint surgeries, particularly effective in **soft tissue resection**, **ligament release** (e.g., glenohumeral ligament), and **cartilage trimming** in procedures like meniscus repair or synovial membrane excision.  

- **Ergonomic Features**: Combines a **square jaw** for gripping dense tissues (calcified ligaments) and a **shovel-shaped tip** for planar tissue removal (e.g., cartilage fragments).  

**2. Technical Specifications**  

- **Diameter**: 4.5mm working end, optimized for narrow joint spaces (knee, shoulder) while maintaining structural integrity.  

- **Length**: 120mm total shaft length, enabling deep joint access through standard arthroscopic portals.  

- **Material**: High-grade stainless steel with **laser-polished surfaces** to reduce tissue drag and improve durability.  

**3. Operational Advantages**  

- **Dual-Action Mechanism**: Square jaw provides **secure grip** for hard tissues, while the shovel-shaped tip allows **precision shaving** in confined spaces.  

- **Straight Shaft Design**: Enhances visibility under arthroscopy and improves maneuverability during procedures like meniscal tear debridement.  

**4. Compatibility & Standards**  

- Complies with ISO 13485 for surgical instruments.  

- Sterilizable via autoclave (recommended temperature: 135°C, cycle time: 20 minutes).  

**5. Clinical Validation**  

- Documented success rate of **92%** in meniscus repair cases, with reduced postoperative complications compared to conventional biters.  

For detailed disassembly instructions or torque parameters, refer to the manufacturer’s technical manual.