Balloon dissector with balloon tip cannula

• US 20050004592A1
• Filed: 05/10/2004
• Published: 01/06/2005
• Est. Priority Date: 05/08/2003
• Status: Active Grant

• Current Assignee: Covidien LP (Medtronic Plc)
• Original Assignee: Tyco Healthcare Group LP (Medtronic Plc)
• Inventors: Criscuolo, Christopher J.
• Granted Patent: US 7,963,975 B2
• Time in Patent Office: Days
• US Class Current: 606/190
• CPC Class Codes: A61B 17/0218 for minimally invasive surgery A61B17/0281, A61B17/0469, A61B17/12013, A61B17/1285, A61B17/29, A61B17/320016 take precedence
• CPC Class Codes: A61B 17/3417 Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating syringe needles A61M5/32; dilators A61M29/00
• CPC Class Codes: A61B 2017/00477 Coupling A61B2017/0046 takes precedence
• CPC Class Codes: A61B 2017/320048 Balloon dissectors
• CPC Class Codes: A61B 2017/3419 Sealing means between cannula and body
• CPC Class Codes: A61B 2017/3486 Balloon

Abstract

There are disclosed various embodiments of a combined balloon dissector with balloon tip cannula which are provided to facilitate forming an anatomical space within the body, such as, for example, an anatomical space in the abdominal cavity or extraperitoneal space for facilitating hernia repair surgeries. The combined balloon dissectors with cannula generally include a cannula assembly for anchoring the device to the abdominal wall and a dissector assembly having a dissection balloon at a distal end for separating tissue layers and forming an anatomical space. Various combinations of valve ports and sub-assemblies are disclosed for providing inflation fluid to the balloon tip cannula, and inflation fluid for the dissection balloon.

Claims

1. A surgical instrument comprising:

a balloon dissector having a dissector housing, a dissector tube extending distally from the dissector housing and a dissection balloon mounted on a distal end of the dissector tube;

a cannula having a cannula housing and a cannula tube extending distally from the cannula housing, the cannula housing having a balloon anchor at a distal end of the cannula tube; and

one of the dissector housing and cannula housing having latching structure and the other of the dissector housing and cannula housing having a recess for receipt of the latching structure.

2. The surgical instrument as recited in claim 1, wherein the cannula housing includes the latching structure and the dissector housing includes the recess for receipt of the latching structure to removably secure the cannula housing and dissector housing together.

3. The surgical instrument as recited in claim 1, wherein the latching structure includes at least one movable arm.

4. The surgical instrument as recited in claim 3, wherein the at least one movable arm include a hook engageable with the recess.

5. The surgical instrument as recited in claim 1, further comprising a shroud removably attachable to the cannula housing.

6. The surgical instrument as recited in claim 1, further comprising an end cap removably attachable to the dissector housing.

7. The surgical instrument as recited in claim 1, further comprising a sleeve surrounding at least a portion of the balloon anchor, the sleeve tending to bias the balloon anchor towards deflation, the cannula housing having a valve in communication with the balloon anchor.

8. A balloon tip cannula comprising:

a cannula housing;

a cannula tube extending distally from the cannula housing;

an anchoring balloon, opposed ends of the anchoring balloon being affixed to the cannula tube; and

a sleeve surrounding at least a portion of the balloon anchor, the sleeve tending to bias the balloon anchor towards deflation.

9. The balloon tip cannula as recited in claim 8, wherein the anchoring balloon is formed of a urethane material.

10. The balloon tip cannula as recited in claim 8, further comprising a ring positioned about each opposed end of the sleeve.

11. The balloon tip cannula as recited in claim 10, wherein each ring is formed of a heat shrinkable material.

12. A method of securing an anchoring balloon to a cannula tube comprising:

affixing opposed ends of an anchoring balloon to a cannula tube; and

disposing a sleeve around the anchoring balloon.

13. The method as recited in claim 12, wherein the flexible sleeve is secured over the anchoring balloon by bands applied about opposed ends of the sleeve.

14. The method as recited in claim 13, wherein the bands are formed of a heat shrinkable material and are heat shrunk about the opposed ends of the sleeve to secure the sleeve over the anchoring balloon.