Patent ID: 11957373
Assignee: SMITH & NEPHEW ASIA PACIFIC PTE. LIMITED
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 12:
13. A mechanical resection instrument comprising:
an outer hub rigidly coupled to an outer tube, the outer tube defining a cutting window on a distal end thereof;
a first magnet coupled to the outer hub, a radial location of the first magnet about the outer hub indicative of location of the cutting window of the outer tube relative to the outer hub;
an inner hub coupled to an inner tube, the inner tube concentrically disposed within the outer tube, and the inner tube defining a cutting window on a distal end thereof;
a second magnet coupled to the inner hub, a radial location of the first magnet about the inner hub indicative of location of the cutting window of the inner tube relative to the inner hub;
a magnetic field strength of the first magnet indicative of a first parameter of the mechanical resection instrument, the magnetic field strength of the first magnet having a first magnitude with a first polarity;
a combined magnetic field strength of the first magnet and the second magnet, when the first magnet and the second magnet reside on a same radial, is indicative of a second parameter of the mechanical resection instrument, the combined magnetic field strength having at least one selected from a group comprising: a second magnitude higher than the first magnitude and with the first polarity; a second magnitude lower than the first magnitude and with the first polarity; a second magnitude with a second polarity opposite the first polarity.