Biopsy Piercing Module With Spring Release for Dense Tissue

The biopsy device is divided into separate functional modules: a traditional biopsy probe assembly and a separate piercing module with its own drive mechanism. This segmentation allows each module to be optimized independently - the piercing module handles dense tissue penetration while the biopsy probe handles sample collection, resolving the contradiction between insertion effectiveness and device complexity.

The piercing module performs preliminary action by penetrating the dense and/or fibrous tissue before the biopsy probe is inserted. The piercing needle creates a pathway through the tough tissue layer first, enabling the subsequent biopsy probe to be inserted more easily and effectively without having to contend with the full resistance of the dense tissue.

The piercing module incorporates a dynamic firing mechanism with movable components including a slider, release arm, and spring-loaded needle. The system transitions from a static assembled state to an active piercing state through controlled movement of these components, enabling strong penetration capability while maintaining a more compact and manageable overall structure through controlled dynamics.

The piercing module acts as an intermediary between the operator and the dense tissue. Rather than requiring the biopsy probe itself to directly penetrate the tough tissue (which would require excessive force and complexity), the piercing needle serves as an intermediate tool that creates the initial pathway, making the overall insertion process more effective with manageable device complexity.