Endoscopic biopsy instrument, endoscope, and method for taking a biopsy sample
AssigneeBibbInstruments AB
InventorCharles Walther
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Abstract
An endoscopic biopsy instrument (1) is disclosed comprising a guide wire (2) arranged in a sheath (3), a drill device (5) arranged at a first end (4) of said guide wire (2), and an actuator (11) for actuating said drill device (5), said actuator being arranged at a second end (10) of said guide wire (2). The drill device (5) comprises an outer tube (6) and an inner cutting device (7). The inner cutting device (7) is slidable and rotatable inside said outer tube (6). The inner cutting device (7) has a helical cutting edge (8). An endoscope comprising such an endoscopic instrument (1) is also disclosed, as well as a method for taking a biopsy sample from a tissue of a subject.
Claims26
An endoscopic biopsy instrument comprising:
- a guide wire arranged in a sheath,
- a drill device arranged at a first end of said guide wire
- and an actuator for actuating said drill device, said actuator being arranged at a second end of said guide wire
- wherein said drill device comprises an outer tube and an inner cutting device, said inner cutting device being slidable and rotatable inside said outer tube, said inner cutting device having a helical cutting edge wherein said guide wire at said second end comprises an outside thread, and wherein said actuator comprises a first rotatable portion having an actuator thread, said actuator thread being engagable with said outside thread of said guide wire for causing said guide wire to rotate and move in its longitudinal direction inside said sheath wherein said actuator is a manually powered actuator and in that the rotatable portion is a manually rotatable portion manually accessible when the endoscopic biopsy instrument is in use.
The endoscopic biopsy instrument as claimed in claim wherein said inner cutting device of said drill device
- comprises an inner core, said helical cutting edge being formed on a helical flange surrounding said inner core.
A method for taking a biopsy sample from a tissue of a subject, the method comprising:
- providing an endoscopic biopsy instrument comprising a guide wire arranged in a sheath, a drill device arranged at a first end of said guide wire, and an actuator for actuating said drill device, said actuator being arranged at a second end of said guide wire, wherein said drill device comprises an outer tube and an inner cutting device, said inner cutting device being slidable and rotatable inside said outer tube, said inner cutting device having a helical cutting edge,
- inserting said first end of said guide wire into a body cavity of said subject,
- advancing said guide wire until said drill device is applied to a surface of the tissue from which the biopsy sample is to be taken,
- advancing said guide wire inside said sheath such that said inner cutting device of said drill device is rotatingly bored into said tissue, such that the biopsy sample is cut out from said tissue,
- enclosing said biopsy sample in said outer tube by a translational movement of said outer tube in relation to said inner cutting device, and
- retrieving said biopsy sample by withdrawing said first end of said guide wire from said body cavity.
Dependencies are inferred from the claim text.