US 2010/0160911 A1Published application

Electrosurgical rotating cutting device

AssigneeWilson-Cook Medical Inc.

InventorRICHARD W. DUCHARME

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Abstract

An electrosurgical cutting device and method thereof for incising tissue are disclosed. The electrosurgical cutting device includes an asymmetrical cutting element that is affixed to a distal end of a torque cable. The cutting element is disposed within an end cap and is axially movable between a retracted position and an extended position. Rotation of the torque cable during a procedure allows the cutting element to rotationally align with and hook the target tissue onto the cutting element. An elongate member of the cutting element selectively lifts the target tissue away from surrounding tissue and structures. Having lifted the tissue away the surrounding tissue and structures, incision can occur.

Claims20

Dependent claims

An electrosurgical cutting device comprising:

an outer elongate sheath having a proximal and a distal end with a central longitudinal axis therebetween, the sheath further comprising a lumen extending from the proximal end to the distal end;
a torque cable comprising a plurality of metallic wires helically wound about the central longitudinal axis of the outer elongate sheath to form a rope-like structure extending between a proximal end and a distal end, the torque cable extending within the lumen of the outer elongate sheath;
and
an electrically conductive cutting element having a proximal portion attached to the distal end of the torque cable and configured to extend within the lumen of the sheath, the cutting element further having a distal portion that extends about a longitudinal axis of the cutting element, the cutting element configured to be rotationally and axially movable by a corresponding rotational and axial movement of the torque cable such that the cutting element selectively lifts target tissue onto a surface of the cutting element for incision.

1 more element

An electrosurgical cutting device comprising:

an outer elongate sheath having a proximal and a distal end with a central longitudinal axis therebetween, the sheath further comprising a lumen extending along the longitudinal axis,
an end cap having a proximal portion and a distal portion, the proximal portion attached to the distal end of the outer elongate sheath and the distal portion comprising a slotted opening, the end cap further comprising a passageway in communication with the lumen of the sheath and the slotted opening of the distal portion of the cap;
a torque cable comprising a plurality of metallic wires helically twisted about the central longitudinal axis of the outer elongate sheath to form a rope-like structure extending between a proximal end and a distal end, the torque cable extending through the lumen of the outer elongate sheath;
and
an electrically conductive cutting element having a proximal straight portion attached to the distal end of the torque cable, the proximal straight portion of the cutting element configured to extend within the passageway of the end cap and being substantially parallel to the central longitudinal axis of the outer elongate sheath, the cutting element further comprising a distal portion asymmetrically disposed about the central longitudinal axis, the cutting element configured to be rotationally and axially movable by a corresponding rotational and axial movement of the torque cable such that the rotational and axial movement of the cutting element causes the asymmetrical distal portion shape to selectively lift target tissue onto the cutting element for incision.

2 more elements

A method for incising target tissue, comprising the steps of:

(a) providing an electrosurgical cutting device comprising:
an outer elongate sheath having a proximal and a distal end with a central longitudinal axis therebetween, the sheath further comprising a lumen extending from the proximal end to the distal end;
a torque cable comprising a plurality of metallic wires, the cable extending within the lumen of the outer elongate sheath;
and
an asymmetrical electrically conductive cutting element having a proximal portion attached to the distal end of the torque cable, the cutting element further having a distal portion that is asymmetrical about a longitudinal axis of the cutting element;
(b) advancing the electrosurgical cutting device towards the target tissue with the cutting element disposed in an axially retracted configuration;
(c) axially extending the cutting element in a distal direction;
(d) rotating the torque cable to correspondingly rotate the distal portion of the asymmetrical cutting element so as to rotationally align the distal portion of the asymmetrical cutting element towards the target tissue;
(e) engaging the target tissue onto the distal portion of the asymmetrical cutting element;
(f) lifting the target tissue away from surrounding tissue and structures;
(g) applying electrical current through the torque cable to the distal portion of the cutting element;
and
(h) incising the target tissue.

10 more elements

Dependencies are inferred from the claim text.

Facts

Application: 12/644,951Filed 22 Dec 2009
Priority: 22 Dec 2008
Published: 24 Jun 2010
Term ends: Not estimatedThe source records don’t support an estimate.

Classification19 codes

A61B 18/149
Probes or electrodes therefor: bow shaped or with rotatable body at cantilever end, e.g. for resectoscopes, or coagulating rollers
A61B 18/1482
Probes or electrodes therefor: having a long rigid shaft for accessing the inner body transcutaneously in minimal invasive surgery, e.g. laparoscopy
A61B 18/1485
Probes or electrodes therefor: having a short rigid shaft for accessing the inner body through natural openings
A61B 18/1492
Probes or electrodes therefor: having a flexible, catheter-like structure, e.g. for heart ablation

Family

Application61/139,980Us provisional application · filed 22 Dec 2008
US 8,518,035 B2Related patent
US 2010/0160911 A1This patent

From the US filing history. Foreign family members aren’t listed.

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