System and method for delivering expanding trocar through a sheath
First Claim
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1. A method for accessing an internal body organ, said method comprising:
- introducing an endoscope to a location adjacent to a wall of the organ; and
advancing a trocar from a lumen in the endoscope, wherein the trocar penetrates the wall of the organ to access a cyst, pseudocyst, abscess, gall bladder, urinary bladder, bile duct, or pancreatic duct;
wherein advancing the trocar releases a blade having a sharpened distal edge from constraint within the lumen so that the blade opens radially to an angle greater than 90 degrees from an elongate body of the trocar as the trocar exits the lumen such that the sharpened distal edge of the blade enlarges the penetration made by a distal tip of the trocar.
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Abstract
A trocar has an elongate body and a tissue-penetrating tip. One or more radially extending blade(s) are provided near the tissue-penetrating tip of the trocar body so that they automatically open as the trocar is advanced through tissue. The blades will enlarge the penetration which was formed by the tip of the trocar.
335 Citations
13 Claims
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1. A method for accessing an internal body organ, said method comprising:
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introducing an endoscope to a location adjacent to a wall of the organ; and advancing a trocar from a lumen in the endoscope, wherein the trocar penetrates the wall of the organ to access a cyst, pseudocyst, abscess, gall bladder, urinary bladder, bile duct, or pancreatic duct; wherein advancing the trocar releases a blade having a sharpened distal edge from constraint within the lumen so that the blade opens radially to an angle greater than 90 degrees from an elongate body of the trocar as the trocar exits the lumen such that the sharpened distal edge of the blade enlarges the penetration made by a distal tip of the trocar. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification