TROCAR ASSEMBLY

• US 20100094228A1
• Filed: 10/05/2009
• Published: 04/15/2010
• Est. Priority Date: 10/10/2008
• Status: Active Grant

• Current Assignee: Covidien LP (Medtronic Plc)
• Original Assignee: Tyco Healthcare Group LP (Medtronic Plc)
• Inventors: Rockrohr, Brian, Smith, Robert C., Davis, Michael, Fischvogt, Gregory, Bettuchi, Michael
• Granted Patent: US 8,740,925 B2
• Time in Patent Office: Days
• US Class Current: 604/167.03
• 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. A surgical system for penetrating tissue, which comprises:

a cannula assembly including;

a cannula housing;

a cannula sleeve depending from the cannula housing and defining a longitudinal axis;

an object seal disposed relative to the cannula housing and being adapted to establish a substantial seal about an object inserted therethrough; and

a cover mounted to the cannula housing and having a cover aperture therethrough, the cover having a trailing end face defining a predetermined geometrical configuration, at least a portion of the trailing end face being obliquely arranged relative to the longitudinal axis and terminating in, and leading toward, the cover aperture to facilitate guiding of the surgical object through the cover aperture; and

an obturator assembly at least partially positionable within the cannula assembly, the obturator assembly including;

an obturator housing having a housing base defining a leading end face, the leading end face defining 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; and

an obturator member extending from the obturator housing and having a leading penetrating member adapted to penetrate tissue.

2. The surgical system of claim 1, wherein the obturator assembly includes an obturator sleeve, the obturator sleeve dimensioned to at least partially accommodate the obturator member.

3. The surgical system of claim 2, wherein the obturator sleeve is adapted for longitudinal movement from an advanced position to a retracted position relative to the obturator member.

4. The surgical system of claim 1, further comprising a zero closure disposed in mechanical cooperation with the cannula housing, the zero closure valve configured to open to permit passage of a surgical object and thereafter close in the absence of the surgical object.

5. 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 a second vertical annular wall disposed inwardly of the first vertical annular wall, 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 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.

6. The object seal of claim 5, wherein the elastomeric seal is over-molded onto the rigid insert.

7. The object seal of claim 5, wherein the rigid insert is made of plastic.

8. The object seal of claim 5, wherein the rigid insert comprises a distally-depending lip, the lip being configured to engage a portion of a cannula housing.

9. A surgical system for penetrating tissue, which comprises:

a cannula assembly including;

a cannula housing;

a cannula sleeve depending from the cannula housing and defining a longitudinal axis; and

an object seal disposed in mechanical cooperation with the cannula housing and being adapted to establish a substantial seal about an object inserted therethrough, the object seal comprising;

a rigid insert including a first horizontal surface, a first vertical wall disposed inwardly of the first horizontal surface, and a second vertical wall disposed inwardly of the first vertical wall, the first vertical wall having a first diameter, the second vertical 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 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;

an obturator assembly at least partially positionable within the cannula assembly, the obturator assembly including an obturator housing; and

an obturator member extending from the obturator housing and having a leading penetrating member adapted to penetrate tissue.

10. The surgical system of claim 9, wherein the obturator assembly includes an obturator sleeve, the obturator sleeve dimensioned to at least partially accommodate the obturator member.

11. The surgical system of claim 10, wherein the obturator sleeve is adapted for longitudinal movement from an advanced position to a retracted position relative to the obturator member.

12. The surgical system of claim 9, wherein the elastomeric seal is over-molded onto the rigid insert.

13. The surgical system of claim 9, wherein the rigid insert is made of plastic.

14. The surgical system of claim 9, wherein the rigid insert comprises a distally-depending lip, the lip being configured to engage a portion of a cannula housing.

15. The surgical system of claim 9, further comprising a zero closure disposed in mechanical cooperation with the cannula housing, the zero closure valve configured to open to permit passage of a surgical object and thereafter close in the absence of the surgical object.