Expandable endoscopic portal

• US 5,882,345 A
• Filed: 05/22/1996
• Issued: 03/16/1999
• Est. Priority Date: 05/22/1996
• Status: Expired due to Term

• Current Assignee: Inbae Yoon
• Original Assignee: Inbae Yoon
• Inventors: Yoon, InBae
• Primary Examiner(s): Coggins, Wynn Wood
• Assistant Examiner(s): RODRIGUEZ, CRIS LOIREN
• Application Number:
  US08/651,284
• Time in Patent Office: 1,028 Days
• Field of Search: 604/1-3, 604/105, 604/198, 604/904, 604/902, 604/96, 604/104, 604/115, 604/268, 604/265, 604/280, 604/164, 604/161, 604/256, 604/174, 604/169, 604/170, 604/165, 604/166 , 604/42, 604/264, 604/167, 606/192, 606/194
• US Class Current: 604/264
• CPC Class Codes: A61B 17/3423 Access ports, e.g. toroid shape introducers for instruments or hands access sites for liquids A61M39/0247
• CPC Class Codes: A61B 17/3439 with means for changing the inner diameter of the cannula, e.g. expandable A61B17/3423, A61B17/3431 take precedence; catheters A61M25/0662
• CPC Class Codes: A61B 17/3462 with means for changing the diameter or the orientation of the entrance port of the cannula, e.g. for use with different-sized instruments, reduction ports, adapter seals expandable cannulas A61B17/3417
• CPC Class Codes: A61B 2017/3419 Sealing means between cannula and body
• CPC Class Codes: A61B 2017/3486 Balloon
• CPC Class Codes: A61B 2017/3492 against the outside of the body
• CPC Class Codes: A61B 2090/3614 using optical fibre
• CPC Class Codes: A61B 90/361 Image-producing devices, e.g. surgical cameras
• CPC Class Codes: A61M 2025/0024 Expandable catheters or sheaths
• CPC Class Codes: A61M 2025/0233 specifically adapted for attaching to a body wall by means which are on both sides of the wall, e.g. for attaching to an abdominal wall
• CPC Class Codes: A61M 2025/1013 with concentrically mounted balloons, e.g. being independently inflatable
• CPC Class Codes: A61M 25/04 in the body, e.g. expansible A61M25/10, A61M16/0488 take precedence
• CPC Class Codes: A61M 25/0662 Guide tubes
• CPC Class Codes: A61M 29/02 Dilators made of swellable material balloon catheters for angioplasty A61M25/104

Abstract

An expandable endoscopic portal for providing a passage through a body cavity wall includes a cannula comprising an absorbent member having a distal end for positioning in the body cavity, a proximal end for positioning external of the body cavity and a passage between the distal and proximal ends for receiving instruments. The absorbent member has a compressed dry state prior to introduction through the cavity wall and an expanded wet state when supplied with fluid upon introduction of the distal end in the body cavity. The absorbent member is rigid in the dry state to facilitate passage through the cavity wall and is soft in the wet state. The absorbent member has an initial cross sectional size in the dry state for introduction through an opening in the cavity wall corresponding in size to the initial cross sectional size. The absorbent member in the wet state has a cross sectional size greater than the initial cross sectional size to dilate the opening and/or form a seal along the thickness of the cavity wall. Instruments of various cross sectional sizes can be introduced in the body cavity through the passage in sealing relation. A method of establishing a passage through a cavity wall includes introducing an elongate absorbent member in an opening in the cavity wall with the absorbent member in a dry state such that the absorbent member extends longitudinally through the cavity wall and hydrating the absorbent member to place the absorbent member in a wet state to cause the absorbent member to expand radially within the opening.

Claims

1. An endoscopic portal for providing a passage through a body cavity wall to provide access to a body cavity comprising

an elongate absorbent member for being introduced through the body cavity wall and having a distal end for being positioned in the body cavity, a proximal end for being positioned externally of the body cavity and a lumen between said distal and proximal ends, said absorbent member having a dry state prior to introduction through the body cavity wall and a wet state upon introduction of said distal end in the body cavity, said absorbent member being rigid in said dry state and being soft in said wet state;

and

a liner disposed in said lumen and defining a passage of variable cross sectional size through said absorbent member for receiving instruments of various cross sectional sizes in sealing relation.

2. An endoscopic portal as recited in claim 1 wherein said absorbent member has a first cross sectional size in said dry state and a second cross sectional size, greater than said first cross sectional size, in said wet state.

3. An endoscopic portal as recited in claim 2 wherein said absorbent member forms a protuberance in said wet state for stabilizing said absorbent member relative to the body cavity wall.

4. An endoscopic portal as recited in claim 1 wherein said liner includes a pleated membrane.

5. An endoscopic portal as recited in claim 4 wherein said pleated membrane has a sphincter configuration.

6. An endoscopic portal as recited in claim 4 wherein said absorbent member includes a longitudinal axis and said pleated membrane defines a plurality of radially extending pleats about said longitudinal axis, each of said pleats having an outer bend extending longitudinally along said absorbent member.

7. An endoscopic portal as recited in claim 4 wherein said pleated membrane is made of non-stretchable material.

8. An endoscopic portal as recited in claim 4 wherein said pleated membrane is made of stretchable material.

9. An endoscopic portal as recited in claim 1 wherein said liner extends the entire length of said absorbent member.

10. An endoscopic portal as recited in claim 1 and further including a channel through said absorbent member connectible with a source of fluid for supplying fluid to said absorbent member, from externally of the body cavity, to obtain said wet state.

11. An endoscopic portal as recited in claim 1 and further including a channel through said absorbent member connectible with a source of suction for evacuating fluid from said absorbent member in said wet state.

12. An endoscopic portal as recited in claim 1 and further including a channel through said absorbent member connectible with a source of fluid for supplying fluid to the body cavity from externally of the body cavity.

13. An endoscopic portal as recited in claim 1 wherein said absorbent member carries a medicament in said dry state and said medicament is released from said absorbent member in said wet state.

14. An endoscopic portal for providing a passage through a body cavity wall to provide access to a body cavity comprising

an elongate absorbent member for being introduced through the body cavity wall and having a distal end for being positioned in the body cavity, a proximal end for being positioned externally of the body cavity and a lumen between said distal and proximal ends, said absorbent member having a dry state prior to introduction through the body cavity wall and a wet state upon introduction of said distal end in the body cavity, said absorbent member being rigid in said dry state and being soft in said wet state;

and

a liner disposed in said lumen and defining a variable size passage in said absorbent member for receiving instruments of various cross sectional sizes in sealing relation said liner including a coating on said absorbent member along said lumen.

15. An endoscopic portal for providing a passage through a body cavity wall to provide access to a body cavity comprising

an elongate absorbent member for being introduced through the body cavity wall and having a distal end for being positioned in the body cavity, a proximal end for being positioned externally of the body cavity, a lumen between said distal and proximal ends and first, second and third channels through said absorbent member, said absorbent member having a dry state prior to introduction through the body cavity wall and a wet state upon introduction of said distal end in the body cavity, said absorbent member being rigid in said dry state and being soft in said wet state, said first channel through said absorbent member being connectible with a source of fluid for supplying fluid to said absorbent member to obtain said wet state, said second channel through said absorbent member being connectible with a source of suction for evacuating fluid from said absorbent member and said third channel through said absorbent member being connectible with a source of fluid for supplying fluid to the body cavity;

and

a liner disposed in said lumen and defining a variable size passage in said absorbent member for receiving instruments of various cross sectional sizes in sealing relation.

16. An endoscopic portal as recited in claim 15 wherein said third channel is connectible with a source of medicament for supplying medicament to the body cavity.

17. An endoscopic portal for providing a passage through a body cavity wall to provide access to a body cavity comprising

an elongate absorbent member for being introduced through the body cavity wall and having a distal end for being positioned in the body cavity, a proximal end for being positioned externally of the body cavity, a lumen between said distal and proximal ends and first, second and third channels through said absorbent member, said absorbent member having a dry state prior to introduction through the body cavity wall and a wet state upon introduction of said distal end in the body cavity, said absorbent member being rigid in said dry state and being soft in said wet state, said first channel through said absorbent member being connectible with a source of fluid for supplying fluid to the body cavity, said second channel through said absorbent member being connectible with a source of suction for evacuating substances from the body cavity and said third channel through said absorbent member being connectible with a source of fluid for supplying fluid to said absorbent member;

and

a liner disposed in said lumen and defining a variable size passage in said absorbent member for receiving instruments of various cross sectional sizes in sealing relation.