Connecting Surgical Tools with Rotational-to-Linear Motion Adapters

This patent describes a system for connecting surgical tools, specifically an end effector to an electrosurgical instrument, by converting rotational motion into linear motion for precise control.

What it covers

This patent provides an assembly for linking an end effector to an electrosurgical instrument. It includes an adapter assembly with first and second pusher assemblies that change rotational spinning into straight-line movement. A drive member within the adapter helps transfer this rotational motion. The assembly also features an extension assembly, which uses flexible bands to carry the straight-line movement from the adapter. Additionally, a trocar assembly within the extension also converts rotational motion into linear motion, ensuring precise control of the surgical tool. For example, this system could allow a surgeon to rotate a control knob on a handle, and have that rotation precisely translate into a forward or backward movement of a tiny cutting or grasping tool at the tip of a long, thin instrument.

What it doesn't cover

• —Does not cover surgical device connections that only use purely mechanical linkages without converting rotational motion to linear motion.
• —Does not cover systems for connecting non-electrosurgical instruments where the specific rotational-to-linear conversion mechanisms (pusher assemblies, flexible band assemblies, trocar assembly) are absent.
• —Does not cover assemblies where linear motion is generated directly without an intermediate rotational input.
• —Does not cover connections for surgical tools that do not involve an 'end effector' being attached to an 'electrosurgical instrument' as described.
• —Does not cover systems that transfer motion solely through rigid rods or cables without the described flexible band assembly.

The clever bit

The novelty lies in the specific combination of adapter and extension assemblies that efficiently convert rotational input into precise linear output, especially using flexible band assemblies for motion transfer and a trocar assembly for additional rotational-to-linear conversion, all within a compact system for surgical tools.

Why it matters

In surgery, especially minimally invasive procedures, precise control over instruments is critical. This patent addresses the challenge of transmitting complex movements from a surgeon's hand to a tiny tool inside the body. By converting rotational motion to linear motion, it allows for fine adjustments and controlled actions, which can improve patient outcomes and enable more complex procedures.

Real-world examples

• 1.Laparoscopic surgical instruments
• 2.Robotic surgical systems
• 3.Endoscopic tools for biopsies
• 4.Minimally invasive surgical devices