Trocar assembly

• US 9,788,857 B2
• Filed: 05/12/2014
• Issued: 10/17/2017
• Est. Priority Date: 10/10/2008
• Status: Active Grant

• Current Assignee: Covidien LP (Medtronic Plc)
• Original Assignee: Covidien LP (Medtronic Plc)
• Inventors: Bettuchi, Michael, Smith, Robert C., Davis, Michael, Rockrohr, Brian, Fischvogt, Gregory
• Primary Examiner(s): Price, Nathan R
• Assistant Examiner(s): Bui, Anh
• Application Number:
  US14/275,215
• Publication Number:
  US 20150126935A1
• Time in Patent Office: 1,254 Days
• CPC Class Codes: A61B 17/3421 Cannulas
• 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 17/3474 Insufflating needles, e.g. Veress needles
• CPC Class Codes: A61B 17/3496 Protecting sleeves or inner probes; Retractable tips for protecting body piercing guide needles A61M25/0612
• CPC Class Codes: A61B 17/3498 Valves therefor, e.g. flapper valves, slide valves haemostasis valves A61M39/06; check valves A61M39/24
• CPC Class Codes: A61B 2017/3464 with means acting on inner surface of valve or seal for expanding or protecting, e.g. inner pivoting fingers
• CPC Class Codes: A61M 2039/0626 used with other surgical instruments, e.g. endoscope, trocar
• CPC Class Codes: A61M 2039/0633 the seal being a passive seal made of a resilient material with or without an opening
• CPC Class Codes: A61M 2039/064 Slit-valve
• CPC Class Codes: A61M 2039/066 Septum-like element
• CPC Class Codes: A61M 2039/0673 comprising means actively pressing on the device passing through the seal, e.g. inflatable seals, diaphragms, clamps
• CPC Class Codes: A61M 2039/0686 comprising more than one seal
• CPC Class Codes: A61M 39/06 Haemostasis valves, i.e. gaskets sealing around a needle, catheter or the like, closing on removal thereof
• CPC Class Codes: A61M 39/0606 without means for adjusting the seal opening or pressure A61M39/0693 takes precedence
• CPC Class Codes: A61M 39/0613 with means for adjusting the seal opening or pressure A61M39/0693 takes precedence

Abstract

A surgical system comprising a cannula assembly and an obturator assembly for penetrating tissue is disclosed. A cover of the cannula assembly is mounted to a cannula housing and has a cover aperture therethrough. The cover has a trailing end face defining a predetermined geometrical configuration, at least a portion of the trailing end face is obliquely arranged relative to a longitudinal axis and terminates in, and leads toward the cover aperture to facilitate guiding of the surgical object through the cover aperture. The obturator assembly includes an obturator housing and an obturator member. The obturator housing has a housing base defining a leading end face, which defines a predetermined geometrical configuration corresponding to the predetermined geometrical configuration of the trailing end face of the cover to mate therewith upon assembly of the obturator assembly with the cannula assembly.

Claims

1. An object seal for use with a cannula assembly, the object seal configured to maintain a substantially fluid-tight seal with respect to an object inserted therethrough, the object seal comprising:

a rigid insert including a first horizontal surface, a first vertical annular wall disposed inwardly of the first horizontal surface and extending distally from the first horizontal surface to a distal-most end of the object seal, and a second vertical annular wall defined between an outer vertical surface of the second vertical annular wall and an inner vertical surface of the second vertical annular wall, the outer vertical surface of the second vertical annular wall disposed inwardly of the first vertical annular wall and proximally of the first horizontal surface, the first vertical annular wall having a first diameter, the second vertical annular wall having a second diameter, the first diameter being larger than the second diameter; and

an elastomeric seal disposed in mechanical cooperation with the rigid insert, the elastomeric seal including a horizontal seal surface disposed within the second vertical annular wall, and the elastomeric seal including an aperture disposed therein for accommodating insertion of a surgical instrument therethrough, the aperture defining a third diameter, the third diameter being smaller than the second diameter.

2. The object seal of claim 1, wherein the elastomeric seal is over-molded onto the rigid insert.

3. The object seal of claim 1, wherein the rigid insert is made of plastic.

4. The object seal of claim 1, wherein the rigid insert comprises a distally-depending lip, the lip being configured to engage a portion of a cannula housing.

5. The object seal of claim 4, wherein the lip is positioned downwardly from the first horizontal surface.

6. The object seal of claim 4, wherein the lip is configured for preventing the object seal from moving circumferentially.

7. The object seal of claim 4, wherein the lip is configured for preventing the object seal from moving radially.

8. The object seal of claim 1, wherein the object seal is configured for being enclosed by a cover.

9. The object seal of claim 1, wherein the object seal is disposed proximally of a zero-closure seal.

10. The object seal of claim 1, wherein the horizontal seal surface is configured for being engaged by an obturator member upon insertion.

11. The object seal of claim 1, wherein the object seal is configured for being clamped to a portion of a housing which prevents axial movement of the object seal.

12. The object seal of claim 4, wherein the lip further prevents circumferential movement of the object seal.

13. The object seal of claim 4, wherein the lip further prevents radial movement of the object seal.

14. The object seal of claim 1, wherein the horizontal seal surface is configured for circumferential movement.

15. The object seal of claim 1, wherein the horizontal seal surface is configured for axial movement.

16. The object seal of claim 1, wherein the horizontal seal surface is configured for radial movement upon insertion of an obturator member.

17. The object seal of claim 1, wherein the rigid insert is fixed from axial and/or radial movement with respect to the aperture upon insertion of an obturator member.

18. The object seal of claim 1, wherein the elastomeric seal is fixed from axial and/or radial movement with respect to the aperture upon insertion of an obturator member.