Valve assembly including diameter reduction structure for trocar

Abstract

A surgical seal assembly includes a sleeve housing adapted to be operatively connected to a surgical sleeve, a seal housing adapted for releasable mounting to the sleeve housing and having a seal member with inner portions adapted to permit passage of a surgical object in substantial sealed relation therewith, and a manual lock member associated with the sleeve housing. The manual lock member is adapted for movement relative to the seal housing between a first position corresponding to a release position of the seal housing to permit removal of the seal housing from mounting to the sleeve housing and a second position corresponding to a lock position of the seal housing to secure the seal housing to the sleeve housing. The manual lock member is preferably adapted for rotational movement relative to a longitudinal axis of the seal housing to move between the first and second positions thereof.

1 . A surgical seal assembly, which comprises: 
 a sleeve housing connected to a surgical sleeve;    a seal housing including a seal member, the seal member having inner portions adapted to permit passage of a surgical instrument in substantial sealed relation therewith; and    a manual lock member movably mounted relative to the sleeve housing, the manual lock member being movable between a first position corresponding to a release position to permit detachment of the seal housing from the sleeve housing, and a second position corresponding to a lock position of the seal housing, to secure the seal housing to the sleeve housing.    
   
   
       2 . The surgical seal assembly according to  claim 1  wherein the manual lock member is adapted for rotational movement relative to a longitudinal axis of the seal housing.  
   
   
       3 . The surgical seal assembly according to  claim 2  wherein the manual lock member includes an annular member associated therewith, the annular member including at least one locking surface adapted to engage a corresponding at least one locking tab of the seal housing upon movement of the manual lock member to the second position.  
   
   
       4 . The surgical seal assembly according to  claim 3  wherein the annular member defines a central aperture for passage of the surgical object.  
   
   
       5 . The surgical seal assembly according to  claim 4  wherein the annular member defines a plurality of mounting recesses adjacent the central aperture, and the seal housing has a plurality of locking tabs corresponding to the mounting recesses, the mounting recesses in general alignment with the locking tabs of the seal housing when in the first position of the manual lock member to receive the locking tabs, the mounting recesses being displaced from the locking tabs upon movement of the manual lock member to the second position thereof.  
   
   
       6 . The surgical seal assembly according to  claim 5  wherein the manual lock member includes a manual grip member depending radially outwardly relative to the longitudinal axis of the seal housing, the manual grip member dimensioned and configured for engagement by the surgeon.  
   
   
       7 . The surgical seal assembly according to  claim 1  including at least two stand-off elements mounted within the seal housing distal of the seal member, the stand-off elements adapted for pivotal movement between an initial position and a pivoted position to permit passage of the surgical object, the stand-off elements being normally biased to the initial position to urge the surgical object into general alignment with respect to a longitudinal axis of the seal housing.  
   
   
       8 . The surgical seal assembly according to  claim 7  wherein the at least two stand-off elements are operatively coupled such that movement of at least one of the stand-off elements between the initial and pivoted positions causes corresponding movement of the other entering element.  
   
   
       9 . The surgical seal assembly according to  claim 1  wherein the sleeve housing is connected to a cannula assembly.  
   
   
       10 . The surgical seal assembly according to  claim 1  wherein one of the seal housing and the sleeve housing includes a locking tab and the other of the seal housing and the sleeve housing includes a locking access, the locking tab and the locking recess cooperating to secure the seal housing to the sleeve housing upon movement of the manual lock member to the second position.  
   
   
       11 . A surgical system, which comprises: 
 a cannula assembly including a cannula housing and a cannula sleeve extending from the cannula housing, the cannula sleeve defining a longitudinal axis and having a longitudinal passageway to permit passage of a surgical instrument; and    a surgical seal assembly including: 
 a first seal subassembly including a first housing having a seal member defining inner portions adapted to permit passage of a surgical object in substantial sealed relation therewith;  
 a second seal subassembly including a second housing adapted for mounting to the cannula housing; and  
 a manual lock member adapted for movement between a first position corresponding to a release position of the first seal subassembly to permit release of the first seal subassembly from mounting to the second seal subassembly and a second position corresponding to a lock position of the first seal subassembly, to secure the first seal subassembly to the second seal subassembly.  
   
   
   
       12 . The surgical system according to  claim 11  wherein the second seal subassembly includes the manual lock member.  
   
   
       13 . The surgical system according to  claim 11  wherein the manual lock member is adapted for rotational movement relative to the longitudinal axis to move between the first and second positions thereof.  
   
   
       14 . The surgical system according to  claim 11  wherein the second subassembly includes a zero closure valve adapted to open to permit passage of the surgical instrument and to substantially close in the absence of the surgical instrument.  
   
   
       15 . The surgical system according to  claim 14  wherein one of the first and second seal assemblies includes a locking latch and the other of the first and second seal subassemblies includes a corresponding locking surface, the locking latch and the locking surface cooperating to secure the first seal subassembly to the second seal subassembly upon movement of the manual lock member to the second position thereof.  
   
   
       16 . The surgical system according to  claim 15  wherein the other of the first and second seal subassemblies includes a locking recess dimensioned for receiving the locking latch when the manual lock member is in the first position whereby upon rotation of the manual lock member to the second position the locking latch cooperatively engages the locking surface.  
   
   
       17 . The surgical system according to  claim 16  wherein the first seal subassembly includes the locking latch and the second seal subassembly includes the locking recess and the locking surface.  
   
   
       18 . The surgical system according to  claim 17  wherein the first seal subassembly includes a plurality of locking latches and the second seal subassembly includes a plurality corresponding locking recesses for receiving the locking latches.  
   
   
       19 . A method for performing a surgical procedure, comprising the steps of: 
 providing an access assembly including an access housing and an access sleeve operatively connected to the access housing the access housing having a manual lock member;    mounting a seal assembly to the access housing, the seal assembly including a seal housing and a seal member mounted relative to the seal housing, the seal member including inner portions adapted to form a substantial seal about a surgical object introduced therethrough; and    securing the seal housing relative to the access housing by moving the manual lock member to cause corresponding structure of the access housing and the seal housing to cooperatively engage in secured relation therewith.