Methods and apparatus for securing medical instruments to desired locations in a patient's body
First Claim
1. A medical device comprising a tube having a distal end, a proximal end, and a longitudinal axis, the device being adapted for placement of said distal end into a patient'"'"'s body at a desired location, said medical device having a fixation agent disposed on said distal end, the fixation agent being adapted for affixing the distal end of said medical device at said desired location.
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Accused Products
Abstract
Devices and methods are provided for securely affixing a medical instrument to desired tissue in a patient'"'"'s body, using a fixation agent. Such medical instruments may comprise localization wires or tissue acquisition instruments, such as biopsy instruments, for example. In the case of tissue acquisition instruments, the inventors have discovered significant advantages for securely affixing the distal end of the tissue acquisition instrument to a particular tissue target area. For example, such an approach permits the imaging environment to be uncoupled from the procedural environment so that expensive and often unavailable imaging equipment, such as stereotactic imaging equipment, need not be used. In a preferred embodiment, a bonding agent, such as adhesive, surgical glue, or a solvent, is used as the fixation agent.
272 Citations
109 Claims
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1. A medical device comprising a tube having a distal end, a proximal end, and a longitudinal axis, the device being adapted for placement of said distal end into a patient'"'"'s body at a desired location, said medical device having a fixation agent disposed on said distal end, the fixation agent being adapted for affixing the distal end of said medical device at said desired location.
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2-48. -48. (canceled)
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49. A medical device for securing a medical instrument to a desired location within a patient'"'"'s body comprising:
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a. a shaft having a distal end, a proximal end, and a longitudinal axis, and having a distal tip configured for advancement within a patient'"'"'s body to a desired location; and
b. a fixation agent for fixing the distal end at the desired location which is selected from a group of fixation agents consisting of a bonding agent, an electrical heating agent, an electrosurgical cauterizing agent, and combinations thereof. - View Dependent Claims (59, 60, 61)
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- 50. The medical device as recited in Clam 49, wherein the distal end of the device has at least one opening for dispensing bonding agent into the patient'"'"'s body to fix the distal end at the desired location.
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62. A medical device for securing medical instruments to a desired location in a patient'"'"'s body comprising:
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a. a shaft having a distal end configured for advancement within a patient'"'"'s body to a desired location, a proximal end, a localization wire, and a longitudinal axis;
b. a fixation agent disposed on the distal end of the shaft which is adapted for affixing the distal end of the medical device at the desired location; and
c. a catheter having a lumen through which the localization wire is introduced into the patient'"'"'s body. - View Dependent Claims (63)
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64. A medical device for securing medical instruments to a desired location in a patient'"'"'s body comprising:
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a. a shaft having a distal end configured for advancement within a patient'"'"'s body to a desired location, a proximal end, and a longitudinal axis and b. an expandable mechanical fixation agent which is configured for affixing the distal end of the shaft to the desired location. - View Dependent Claims (65, 66, 67, 68, 69)
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70. A tissue acquisition instrument for retrieving tissue at a body site comprising
a. a longitudinal axis; -
b. a distal end with a distal tip configured for advancement within a patient'"'"'s body;
c. a cutting element having a contracted configuration for delivery to the body site and an expanded configuration for separating tissue from the body site;
d. a lumen containing a bonding agent and at least one opening disposed at the distal end for dispensing the bonding agent to surrounding tissue; and
e. a mechanical fixation element disposed proximal to the distal end which has an expanded configuration for securing the tissue acquisition instrument at a predetermined desired location, in order to insure that the tissue acquisition instrument remains in place during a tissue acquisition procedure and which has a fully retracted configuration with a transverse dimension of the bendable legs which is smaller than the expanded configuration. - View Dependent Claims (71, 72, 73, 74, 75, 76)
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77. A tissue acquisition instrument for retrieving tissue at a body site comprising:
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a. a longitudinal axis;
b. a distal end with a distal tip configured for advancement within a patient'"'"'s body;
c. a cutting element which has a contracted configuration for delivery to the body site and an expanded configuration for separating tissue from the body site;
d. and a mechanical fixation element which is a Mallicot structure, which is disposed proximal to the distal end, which has an expanded configuration for securing the tissue acquisition instrument at a predetermined desired location, in order to insure that the tissue acquisition instrument remains in place during a tissue acquisition procedure and which has a fully retracted configuration with a transverse dimension of the bendable legs which is smaller than the expanded configuration. - View Dependent Claims (78, 79, 80)
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81. A tissue acquisition instrument for retrieving a tissue specimen at a body site comprising:
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a. a longitudinal axis;
b. a distal end with a distal tip configured for advancement within a patient'"'"'s body;
c. a cutting element which has a contracted configuration for delivery to the body site and an expanded configuration for separating tissue from the body site and d. a mechanical fixation element which is a radially expandable and retractable basket, which is disposed proximal to the distal end, which has an expanded configuration for securing the tissue acquisition instrument at a predetermined desired location, in order to insure that the tissue acquisition instrument remains in place during a tissue acquisition procedure and which has a fully retracted configuration with a transverse dimension which is smaller than the expanded configuration. - View Dependent Claims (82, 83)
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84. A tissue acquisition instrument for retrieving tissue at a body site comprising:
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a. a longitudinal axis;
b. a distal end with a distal tip configured for advancement within a patient'"'"'s body;
c. a-cutting element which has a contracted configuration for delivery to the body site and an expanded configuration for separating tissue from the body site;
d. a mechanical fixation element disposed proximal to the distal end which has an expanded configuration for securing the tissue acquisition instrument at a predetermined desired location, in order to insure that the tissue acquisition instrument remains in place during a tissue acquisition procedure and which has a contracted configuration with a transverse dimension which is smaller than the expanded configuration for delivery to a target site; and
e. a bushing which is disposed on the instrument, which is rotatable relative to the instrument, and which has an electrosurgical element disposed on the bushing which coagulates and bonds surrounding tissue to the bushing when the electrosurgical element is energized so that the instrument is secured in a desired location without preventing movement thereof.
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85. A tissue acquisition instrument for retrieving tissue at a body site comprising:
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a. an elongated shaft having a distal portion, a proximal portion and a longitudinal axis;
b. a distal end with a distal tip configured for advancement within a patient'"'"'s body;
c. a cutting element which has a contracted configuration for delivery to the body site and an expanded configuration for separating tissue from the body site; and
d. a mechanical fixation element disposed proximal to the distal end which has an expanded configuration for securing the tissue acquisition instrument at a predetermined desired location, in order to insure that the tissue acquisition instrument remains in place during a tissue acquisition procedure, and which has a fully retracted configuration with a transverse dimension which is smaller than the expanded configuration and a hinged linkage configured to have a transverse dimension smaller than a transverse dimension of a tissue specimen.
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86. A method for performing a tissue acquisition procedure comprising the steps of:
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a.) providing a tissue acquisition instrument having a distal end, a proximal end, a longitudinal axis, and a cutting element;
b) placing the distal end of the instrument in a patient'"'"'s body, so that the distal end is disposed in a desired tissue location and c) affixing the distal end of the instrument to the desired tissue location by performing a step selected from the group consisting of dispensing a bonding agent from the distal end into surrounding tissue, activating an electrosurgical element, activating an electrical heating element, and combinations thereof. - View Dependent Claims (87, 88, 89, 90)
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91. A biopsy device for separating a tissue specimen from a target site within a patient, comprising:
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a. an elongated shaft having a distal shaft portion, a proximal shaft portion, a tissue penetrating distal tip and a longitudinal axis;
b. a radially expandable, longitudinally oriented tissue cutting component which is secured to the distal shaft portion proximal to the distal tip, which has a distal end and a proximal end and which has a contracted configuration for delivery to the target site and an expanded configuration for cutting the tissue specimen from supporting tissue at the target site; and
c. a tissue fixation component disposed on the elongated shaft between the proximal and distal ends of the tissue cutting component to be fixed to the tissue specimen. - View Dependent Claims (92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109)
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Specification