Apparatus and method for surgically accessing a body cavity
First Claim
1. An access device adapted for disposition across a body wall having a proximal side and an organ wall having a distal side defining an organ cavity of a patient, comprising:
- an elongate tube having an axis extending between a proximal end and a distal end, the tube being adapted to extend through the body wall and the organ wall to provide access into the body cavity;
an anchor having a natural state facilitating insertion of the device through the body wall and a high-profile state facilitating engagement of the distal side of the organ;
a flexible tension element coupled to the anchor and having characteristics for being tensioned on the proximal side of the body wall to move the anchor from the natural state to the high-profile state; and
the flexible tension element being severed on the proximal side of the body wall to permit the anchor to move from the high-profile state to the natural state in order to facilitate withdrawal of the access device from the body wall.
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Accused Products
Abstract
An access device, such as a gastrostomy tube, includes a Mallincott anchoring structure reinforced with an insert and operable by a pair of sutures. An electrosurgical obturator is positioned in the tube and functions as a stylet for placing the structure in a low profile state. The obturator can then be activated to insert the tube through the abdominal wall and the stomach wall to provide access to the stomach cavity. The sutures can then be tensioned to raise the Mallincott structure to a high profile state and draw the stomach into proximity with the abdominal wall. Removing the obturator leaves the tube operatively disposed and providing direct access to the stomach cavity.
249 Citations
15 Claims
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1. An access device adapted for disposition across a body wall having a proximal side and an organ wall having a distal side defining an organ cavity of a patient, comprising:
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an elongate tube having an axis extending between a proximal end and a distal end, the tube being adapted to extend through the body wall and the organ wall to provide access into the body cavity; an anchor having a natural state facilitating insertion of the device through the body wall and a high-profile state facilitating engagement of the distal side of the organ; a flexible tension element coupled to the anchor and having characteristics for being tensioned on the proximal side of the body wall to move the anchor from the natural state to the high-profile state; and the flexible tension element being severed on the proximal side of the body wall to permit the anchor to move from the high-profile state to the natural state in order to facilitate withdrawal of the access device from the body wall. - View Dependent Claims (2, 3, 7, 8, 9, 10, 11)
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4. A gastrostomy combination adapted to provide access across an abdominal wall and a stomach wall into a stomach cavity, comprising:
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a gastrostomy tube having a channel and an a axis extending between a proximal end and a distal end; an obturator disposed within the channel of the gastrostomy tube and having a distal tip extending beyond the distal end of the gastrotomy tube, the distal tip of the obturator being electrically operable to penetrate the abdominal wall and the stomach wall with the gastrostomy tube; and the obturator being removable from the gastrostomy tube leaving the gastrostomy tube operatively positioned across the abdominal wall and the stomach wall to provide access into the stomach cavity. - View Dependent Claims (5, 6)
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12. An access device adapted for disposition across a body wall having a proximal side and an organ wall having a distal side defining an organ cavity of a patient, comprising:
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an elongate tube having an axis extending between a proximal end and a distal end, the tube being adapted to extend through the body wall and the organ wall to provide access into the body cavity; an anchor having a low-profile state facilitating insertion of the elongate tube through the body wall, a natural state, and a high-profile state facilitating engagement of the distal side of the organ wall; a compression element insertable into the elongate tube to move the anchor from the natural state to the low-profile state, thereby facilitating insertion of the access device through the body wall, the compression element being removable from the elongate tube; a tension element coupled to the anchor and operable from the proximal side of the body wall to move the anchor from the natural state to the high-profile state thereby facilitating engagement of the distal side of the organ wall; a fixation element adapted to receive the tension element on the proximal side of the body wall for maintaining tension on the tension element in order to hold the anchor in the high-profile state; and the tension element having characteristics for being released from the fixation element in the absence of the compression element to permit movement of the anchor from the high-profile state to the natural state and thereby facilitate removal of the elongate tube from the organ and the body wall. - View Dependent Claims (13, 14, 15)
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Specification