Trocar valve assembly

• US 5,709,664 A
• Filed: 03/01/1996
• Issued: 01/20/1998
• Est. Priority Date: 07/02/1992
• Status: Expired due to Fees

• Current Assignee: Applied Medical Resources Corporation (Applied Medical Corporation)
• Original Assignee: Applied Medical Resources Corporation (Applied Medical Corporation)
• Inventors: Tangherlini, Vincent C., Vandenbroek, Frans
• Primary Examiner(s): Hafer, Robert A.
• Assistant Examiner(s): Racunas, Robert V.
• Application Number:
  US08/609,720
• Time in Patent Office: 690 Days
• Field of Search: 604/167, 604/256, 604/283
• US Class Current: 604/167.04
• 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 17/3498 Valves therefor, e.g. flapper valves, slide valves haemostasis valves A61M39/06; check valves A61M39/24
• CPC Class Codes: A61B 2017/0023 disposable
• CPC Class Codes: A61B 2017/0046 with a releasable handle; with handle and operating part separable for prosthetic joint-implanting tools A61F2/4603
• CPC Class Codes: A61B 2017/349 Trocar with thread on outside
• CPC Class Codes: A61B 2090/0813 Accessories designed for easy sterilising, i.e. re-usable
• CPC Class Codes: A61M 2039/0072 Means for increasing tightness of the septum, e.g. compression rings, special materials, special constructions
• CPC Class Codes: A61M 2039/062 used with a catheter
• 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 2039/0646 Duckbill-valve
• CPC Class Codes: A61M 39/06 Haemostasis valves, i.e. gaskets sealing around a needle, catheter or the like, closing on removal thereof

Abstract

A trocar having a working channel extending along an between a distal end and a proximal end includes a cannula at the distal end and a housing at the proximal end which define a working channel of the trocar. A valve disposed in the working channel separates the trocar into regions proximal of the valve and regions distal of the valve. The valve includes elastomeric means which form a first seal that is openably closable across the working channel. A wall of the valve extends radially outwardly of the elastomeric means and forms a second seal with the housing. The trocar also includes means for defining a passage extending from regions exterior of the trocar through the regions proximal of the valve and into the regions distal of the valve. Valve means disposed across this passage controls the administration of fluid through the passage and into the working channel of the cannula.

Claims

1. A trocar having a working channel extending along an axis between a distal end and proximal end, the trocar comprising:

a cannula having a tubular configuration and a wall which defines the working channel at the distal end of the trocar;

a housing disposed in fixed relationship to the cannula and defining the working channel at the proximal end of the trocar;

a valve disposed in the working channel and separating the channel into regions proximal of the valve and regions distal of the valve;

elastomeric means included in the valve and forming a first seal which is openably closable across the working channel;

a wall included in the valve and extending radially outwardly of the elastomeric means;

portions of the housing engaging the valve wall and forming with the valve wall a second seal which is disposed generally outwardly of the first seal;

means for defining a passage extending from regions exterior of the trocar, through the regions proximal of the valve, and into the regions distal of the valve;

a housing inlet included in the passage defining means, the housing inlet defining a first section of the passage which extends through the housing to provide fluid communication between the regions exterior of the trocar and the regions proximal of the valve; and

valve means disposed across the housing inlet for openably closing the first section of the passage to thereby control the administration of a fluid from the regions exterior of the trocar, through the passage and into the working channel of the cannula.

2. The trocar recited in claim 1 further comprising:

portions of the valve included in the passage defining means and defining a second section of the passage between the first seal and the second seal.

3. The trocar recited in claim 2 further comprising a manifold included in the passage defining means and defining a third section of the passage between the first section of the passage and the second section of the passage.

4. The trocar recited in claim 3 wherein the valve wall includes an annular flange extending transverse to the working channel and the portions of the valve define the second section of the passage in the form of at least one hole extending through the annular flange.

5. The trocar recite in claim 4 wherein the manifold includes:

a multiplicity of walls defining a fenestration of windows, at least one of the windows being disposed in fluid communication with the inlet of the housing and the at least one hole in the annular flange of the valve.

6. The trocar recited in claim 5 wherein the annular flange is sandwiched between the portions of the housing and the walls of the manifold to create the second seal between the valve and the housing.

7. The trocar recited in claim 1 wherein the valve is a double duck bill valve.

8. The trocar recited in claim 5 wherein the manifold further comprises:

means defining a distribution chamber in fluid communication with each of the windows in the fenestration of windows and in fluid communication with each of the holes in the annular flange.

9. A trocar having a working channel extending along an axis between a proximal end and a distal end, comprising:

a cannula having a first axis and a tubular configuration with a wall which extends distally from a proximal end of the cannula to define the working channel at the distal end of the trocar;

a housing having a second axis and a wall which extends proximally from a distal end of the housing to at least partially define the working channel at the proximal end of the trocar;

at least one seal disposed in the housing across the working channel and proximally of the distal end of the housing;

one of the cannula and the housing being formed of a sterilizable metal material;

the other of the cannula and the housing being formed of a disposable plastic material; and

means disposed at the proximal end of the cannula and the distal end of the housing for releasably joining the cannula to the housing with the first axis aligned with the second axis to define the working channel of the trocar.

10. The trocar recited in claim 9 wherein the joining means includes a bayonet connector comprising:

at least one tab disposed at one of the proximal end of the cannula and the distal end of the housing;

means defining at least one recess at the other of the proximal end of the cannula and the distal end of the housing, the at least one recess being sized and configured to receive the at least one tab and to removably fix the cannula to the housing; and

means disposed at the other of the proximal end of the cannula and the distal end of the housing for slidingly engaging the at least one tab and for guiding the at least one tab toward the means defining at least one recess.

11. The trocar recited in claim 10 wherein the at least one tab is disposed at the proximal end of the cannula and the means for defining the at least one recess is disposed at the distal end of the housing.

12. The trocar recited in claim 11 wherein the engaging means comprises a ramp extending from a distal position on the housing radially proximally to the means defining the at least one recess, the ramp being configured to receive the at least one tab and to slidingly engage the at least one tab and to guide the at least one tab toward the means defining the at least one recess.

13. The trocar recited in claim 9 wherein the means defining the at least one tab includes means for defining at least two tabs diametrically opposed at the one of the distal end of the housing and the proximal end of the cannula.

14. The trocar recited in claim 11 wherein the at least one tab extends radially outwardly of the wall of the cannula.