Surgical cauterization snare with polyp capturing web net
First Claim
1. A method for removing a selected portion of internal body tissues of a patient, comprising the steps of:
- providing a conductive cauterization loop to which a flexible web member is connected to define an expandable pocket, said web member being attached to said loop in a manner so as to expose said loop to enable effective cauterization of organic tissues by said loop;
inserting an endoscope assembly into a patient;
using said endoscope assembly to visually monitor internal body tissues of the patient upon insertion of said endoscope assembly into the patient;
upon detecting selected internal body tissues to be removed from the patient, ejecting said loop with said web member from a distal end of a biopsy channel of said endoscope assembly;
upon ejection of said loop and said web member from said biopsy channel, at least partially expanding said loop and said web member from a collapsed configuration;
manipulating said loop from outside of the patient to pass the expanded loop over the selected internal body tissues to be removed, so that said web member substantially surrounds said selected internal body tissues;
closing said loop to engage said selected internal body tissues around a base region thereof;
conducting an electrical current through said loop to burn through said selected internal body tissues at said base region, thereby severing said selected internal body tissues at said base region; and
upon a completed burning of said loop through said base region, at least partially closing said loop, thereby capturing the severed internal body tissues.
4 Assignments
0 Petitions
Accused Products
Abstract
A surgical instrument assembly for use in snare cauterization operations includes a tubular sheath member, a metallic cauterization loop, and a metal wire operatively connected to the loop, the wire passing longitudinally through the sheath. An electrical supply is operatively connectable to the wire for feeding an electrical current to the loop via the wire, while a manually actuatable shifter is operatively connected to the wire for longitudinally sliding the wire along the sheath in alternately opposite directions. A flexible web member is connected to the loop to form a capture pocket, the loop defining a mouth opening of the pocket. During use of the snare cauterization instrument, the loop is at least partially expanded from a collapsed configuration and passed over a polyp to be removed, so that the web member substantially surrounds the selected polyp. The loop is then closed to engage the polyp around a base region thereof and an electrical current is subsequently conducted through the loop to burn through the polyp at the base region thereof. Severance of the polyp occurs upon a closure of the cauterization loop by its being withdrawn or retracted into the tubular sheath member. The severed polyp is automatically captured by the web member.
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Citations
20 Claims
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1. A method for removing a selected portion of internal body tissues of a patient, comprising the steps of:
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providing a conductive cauterization loop to which a flexible web member is connected to define an expandable pocket, said web member being attached to said loop in a manner so as to expose said loop to enable effective cauterization of organic tissues by said loop; inserting an endoscope assembly into a patient; using said endoscope assembly to visually monitor internal body tissues of the patient upon insertion of said endoscope assembly into the patient; upon detecting selected internal body tissues to be removed from the patient, ejecting said loop with said web member from a distal end of a biopsy channel of said endoscope assembly; upon ejection of said loop and said web member from said biopsy channel, at least partially expanding said loop and said web member from a collapsed configuration; manipulating said loop from outside of the patient to pass the expanded loop over the selected internal body tissues to be removed, so that said web member substantially surrounds said selected internal body tissues; closing said loop to engage said selected internal body tissues around a base region thereof; conducting an electrical current through said loop to burn through said selected internal body tissues at said base region, thereby severing said selected internal body tissues at said base region; and upon a completed burning of said loop through said base region, at least partially closing said loop, thereby capturing the severed internal body tissues. - View Dependent Claims (2, 3, 4)
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5. A surgical instrument assembly for use in snare cauterization operations, comprising:
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an endoscope assembly including an endoscope insertion member having a biopsy channel and further having means disposed at a distal end of said endoscope insertion member for delivering light to and receiving light from a surgical site; a tubular sheath member inserted through said biopsy channel; a metallic cauterization loop; a metal wire operatively connected to said loop, said wire passing longitudinally through said sheath; electrical supply means operatively connected to said wire for feeding an electrical current to sail loop via said wire; manually actuatable shifting means operatively connected to said wire for longitudinally sliding said wire along said sheath in alternately opposite directions; and a flexible web member connected to said loop to form a capture pocket, said loop defining a mouth opening of said pocket, said web member being attached to said loop in a manner so as to expose said loop to enable effective cauterization of organic tissues by said loop. - View Dependent Claims (6, 7, 8, 9, 10)
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11. A method for removing a selected portion of internal body tissues of a patient, comprising the steps of:
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providing a conductive cauterization loop to which a flexible web member is connected to define an expandable pocket, said web member being attached to said loop in a manner so as to expose said loop to enable effective cauterization of organic tissues by said loop; at least partially expanding said loop and said web member from a collapsed configuration; passing the expanded loop over the selected internal body tissues to be removed, so that said web member substantially surrounds said selected internal body tissues; closing said loop to engage said selected internal body tissues around a base region thereof; conducting an electrical current through said loop to burn through said selected internal body tissues at said base region, thereby severing said selected internal body tissues at said base region; and operating an instrument to apply a pair of markers to tissues on opposite sides of said base region, thereby enabling subsequent identification of the severed internal body tissues with a respective site within the patient. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. A surgical assembly comprising:
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a tubular sheath member; a metallic cauterization loop, said loop having a bend in an expanded configuration of said loop, said bend arcing out of a plane in which said loop opens and closes; a metal wire operatively connected to said loop, said wire passing longitudinally through said sheath; electrical supply means operatively connected to said wire for feeding an electrical current to said loop via said wire; manually actuatable shifting means operatively connected to said wire for longitudinally sliding said wire along said sheath in alternately opposite directions; and a flexible web member connected to said loop to form a capture pocket, said loop defining a mouth opening of said pocket, said web member being attached to said loop in a manner so as to expose said loop to enable effective cauterization of organic tissues by said loop.
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Specification