Marker delivery device for tissue marker placement
First Claim
1. A marker delivery device configured for deploying a tissue marker, comprising:
- a handle having a chamber;
a cannula configured for holding the tissue marker for deployment;
a marker introducer rod movably disposed in the lumen of the cannula;
a deployment mechanism mounted to the handle and configured to displace the marker introducer rod for deploying the tissue marker upon an actuation of the deployment mechanism, anda retraction mechanism mounted to the handle and configured to facilitate a complete retraction of both the cannula and the marker introducer rod into the chamber of the housing of the handle upon an actuation of the retraction mechanism, wherein the deployment mechanism includes a first shear member that has a first region of reduced cross section dimension configured to shear during retraction of the marker introducer rod to limit the marker delivery device to a single use for marker deployment.
1 Assignment
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Accused Products
Abstract
A marker delivery device is configured for deploying a tissue marker. The marker delivery device includes a handle having a chamber, and a cannula. According to one aspect, the cannula has a flexible portion formed by a slot arrangement having of a plurality of spaced-apart substantially parallel peripheral slots extending through the side wall of the cannula to the lumen. A marker introducer rod is movably disposed in the lumen of the cannula for deploying the mark, and has a flexible region that corresponds to the flexible portion of the cannula. According to another aspect, a retraction mechanism is mounted to the handle and is configured to facilitate a complete retraction of both the cannula and the marker introducer rod into the chamber of the housing of the handle upon an actuation of the retraction mechanism.
504 Citations
32 Claims
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1. A marker delivery device configured for deploying a tissue marker, comprising:
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a handle having a chamber; a cannula configured for holding the tissue marker for deployment; a marker introducer rod movably disposed in the lumen of the cannula; a deployment mechanism mounted to the handle and configured to displace the marker introducer rod for deploying the tissue marker upon an actuation of the deployment mechanism, and a retraction mechanism mounted to the handle and configured to facilitate a complete retraction of both the cannula and the marker introducer rod into the chamber of the housing of the handle upon an actuation of the retraction mechanism, wherein the deployment mechanism includes a first shear member that has a first region of reduced cross section dimension configured to shear during retraction of the marker introducer rod to limit the marker delivery device to a single use for marker deployment. - View Dependent Claims (2)
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3. A marker delivery device configured for deploying a tissue marker, comprising:
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a handle configured to be grasped by a user; a cannula having a proximal end and a distal end, the proximal end being coupled to the handle; and a marker introducer rod movably disposed in the lumen of the cannula to effect a deployment of the tissue marker from the distal end of the cannula, wherein the handle includes a housing having a front end and a back end, with a chamber having a longitudinal extent between the front end and the back end, and having a hole leading to the chamber for receiving the cannula, and further comprising; an introducer rod guide block attached to the actuation end of the marker introducer rod, the introducer rod guide block being slidably disposed in the chamber of the housing; a first shear member that has a first region of reduced cross section dimension configured to shear during retraction of the marker introducer rod; a marker deployment trigger accessible at an exterior of the housing, the marker deployment trigger being linked to the introducer rod guide block by the first shear member, wherein an actuation of the marker deployment trigger causes the first shear member to displace the marker introducer rod to move the marker introducer rod along the lengthwise extent of the cannula to deploy the tissue marker from the lumen of the cannula; a retraction trigger accessible at the exterior of the housing; a second shear member having a second region of reduced cross section dimension coupled to the retraction trigger, and configured such that the second region of reduced cross section dimension is sheared to separate the retraction trigger from the second shear member when the retraction trigger is actuated; a cannula guide block attached to the proximal end of the cannula, the cannula guide block being slidably disposed in the chamber of the housing, the retraction trigger being linked to the cannula guide block by the second shear member to hold the cannula guide block stationary relative to the housing of the handle; and a spring located between the front end of the housing and the cannula guide block, the spring being in a compressed state prior to actuation of the retraction trigger to provide a preload on the cannula guide block. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10)
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11. A marker delivery device configured for deploying a tissue marker, comprising:
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a handle configured to be grasped by a user, the handle including a housing having a front end and a back end, with a chamber located between the front end and the back end, and having a hole leading from the chamber to the exterior of the handle; a cannula having a proximal end, a distal end, and a lumen extending along a lengthwise extent of the cannula between the proximal end and the distal end, the cannula being positioned in the handle such that the cannula retractably extends through the hole beyond the front end of the housing; a marker introducer rod movably disposed in the lumen of the cannula to effect a deployment of the tissue marker from the distal end of the cannula, the marker introducer rod having an actuation end and a marker deployment end; a deployment mechanism mounted to the housing, the deployment mechanism being coupled to the actuation end of the marker introducer rod, the deployment mechanism being configured to displace the marker introducer rod for deploying the tissue marker upon an actuation of the deployment mechanism; a retraction mechanism mounted to the housing, the retraction mechanism being coupled to the proximal end of the cannula, the retraction mechanism being configured to facilitate a complete retraction of both the cannula and the marker introducer rod into the chamber of the housing of the handle upon an actuation of the retraction mechanism; and a shear mechanism having a shear region of reduced cross section dimension, the shear mechanism configured to be manually displaced by a user and configured such that when manually displaced the shear region is exposed to a force exerted by the retraction mechanism to shear the shear mechanism at the shear region to enable the retraction. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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Specification