Trocar set

Abstract

A trocar set includes a handle portion, a first sleeve, a second sleeve, and a gasbag. The handle portion includes a grip, a connection part, and a first gas valve. The connection part extends from the grip and includes an assembling channel. The first gas valve is connected to the connection part and communicates with the assembling channel. An assembling end of the first sleeve is assembled to the connection portion. A sleeving end of the first sleeve is provided with a first opening. The second sleeve is retractably connected to the sleeving end of the first sleeve. A sleeve wall of the second sleeve is provided with a second opening. The gasbag is connected to an end of the second sleeve away from the sleeving end and corresponds to the second opening. The design of the retractable sleeves is benefit to perform operation.

1 - 7 . (canceled) 
     
     
         8 . A trocar assembly having an extended position and a retracted position, the trocar assembly comprising:
 a handle portion including a gas valve for directing a gas flow into the trocar assembly;   a first sleeve having a first end proximate the handle portion and a second end opposite the first end, the first sleeve further comprising an inner wall and an outer wall;   a first flow path extending between the inner wall and outer wall of the first sleeve, the first flow path in fluid communication with the gas valve;   a second sleeve having a first end proximate the handle portion and a second end opposite the first end, the second sleeve further comprising an inner wall and an outer wall, the second sleeve having an interior region for receiving a length of the second end of the first sleeve;   a second flow path extending between the inner wall and the outer wall of the second sleeve, the second flow path being in fluid communication with the first flow path in the extended position; and   a gas tight assembly including a first sealing element and a second sealing element, wherein the first sealing element is coupled to and surrounds an exterior of the outer wall of the first sleeve, and   wherein the second sealing element encloses the first flow path at the second end of the first sleeve, the second sealing element contacting the second sleeve for slidable displacement of the second sealing element relative to inner wall of the second sleeve and for preventing a gas flow from exiting the first flow path at the second end of the first sleeve.   
     
     
         9 . The trocar assembly of  claim 8 , wherein the second flow path is in fluid communication with the first flow path in the retracted position. 
     
     
         10 . The trocar assembly of  claim 8 , wherein the outer wall of the second sleeve includes an opening defining a passageway in fluid communication with an interior of a gasbag for inflating the gasbag. 
     
     
         11 . The trocar assembly of  claim 8 , wherein the gas tight assembly further comprises a gas tight sleeve coupled to the second sleeve and positioned over the first sealing element for pressing the first sealing element against the outer wall of the first sleeve for sealing the first sealing element to the first sleeve. 
     
     
         12 . The trocar assembly of  claim 11 , further comprising a blocking element coupled to the gas tight sleeve for preventing the first sleeve from being disengaged from the second sleeve, wherein the gas tight sleeve covers the blocking element. 
     
     
         13 . The trocar assembly of  claim 8 , wherein first sleeve is telescopically received within the second sleeve, and wherein the length of the first sleeve telescopically received within the second sleeve is greater in the retracted position than in the extended position. 
     
     
         14 . The trocar assembly of  claim 8 , wherein in the retracted position at least a portion of the gas tight assembly contacts the handle portion. 
     
     
         15 . The trocar assembly of  claim 14 , wherein in the extended position, at least a length of the first sleeve is positioned laterally between the handle portion and the gas tight assembly. 
     
     
         16 . The trocar assembly of  claim 8 , wherein in the retracted position the first sealing element and second sealing element are separated by a first length, and in the extended position the first sealing element and second sealing element are separated by a second length, wherein the first length is greater than the second length. 
     
     
         17 . The trocar assembly of  claim 8 , wherein a total length of the first flow path combined with the second flow path is greater in the retracted position than in the extended position. 
     
     
         18 . A trocar assembly having an extended and a retracted position, the trocar assembly comprising:
 a handle portion having a gas valve receiving a gas flow;   a first sleeve having a first end proximate the handle portion and a second end opposite the first end, the first sleeve having an inner surface that defines a first flow path;   a second sleeve having a first end proximate the handle portion and a second end opposite the first end, the second sleeve having an inner surface that defines an inner region of the second sleeve, the inner region of the second sleeve being sized and shaped to receive the second end of the first sleeve;   a gas tight assembly including a first sealing element for preventing a gas flow from leaking from the first flow path at the second end of the first sleeve, the gas tight assembly also including a second sealing element that surrounds the first sleeve, wherein the first sealing element and the second sealing element are displaceable relative to one another as the trocar assembly is moved between the extended and retracted positions.   
     
     
         19 . The trocar assembly of  claim 18 , wherein the gas tight assembly further comprises a gas tight sleeve coupled to the second sleeve and positioned over the second sealing element for pressing the second sealing element against an outer surface of the first sleeve for sealing the second sealing element to the first sleeve. 
     
     
         20 . The trocar assembly of  claim 19 , further comprising a blocking element coupled to the gas tight sleeve for preventing the first sleeve from being disengaged from the second sleeve, wherein the gas tight sleeve covers the blocking element. 
     
     
         21 . The trocar assembly of  claim 20 , wherein in the retracted position the first sealing element and second sealing element are separated by a first length, and in the extended position the first sealing element and second sealing element are separated by a second length, wherein the first length is greater than the second length. 
     
     
         22 . The trocar assembly of  claim 19 , wherein in the extended position, at least a length of the first sleeve is positioned laterally between the handle portion and the gas tight sleeve. 
     
     
         23 . A method of inflating a gasbag of a trocar assembly comprising:
 pumping a gas into a gas valve of the trocar assembly and into a first flow path defined by a space between an inner wall and an outer wall of an inner sleeve of the trocar assembly;   forcing the gas through an opening in the outer wall of the inner sleeve into a second flow path defined by a space between an inner wall and an outer wall of an outer sleeve of the trocar assembly; and   forcing the gas through an opening in the outer sleeve of the trocar assembly and into an inflatable region of the gasbag of the trocar assembly,   wherein a first end of the inner sleeve is coupled to an inner surface of the outer sleeve for positioning a length of the inner sleeve within an inner region of the outer sleeve.   
     
     
         24 . The method of  claim 23 , further comprising:
 preventing the gas from exiting the first flow path at the first end of the inner sleeve via a first sealing element positioned at the first end of the inner sleeve.   
     
     
         25 . The method of  claim 24 , further comprising:
 directing the gas from the opening in the outer wall of the inner sleeve to the second flow path via a gas tight assembly that is coupled to and surrounds an exterior of the outer wall of the inner sleeve and an outer wall of the outer sleeve.   
     
     
         26 . The method of  claim 25 , further comprising:
 positioning the trocar assembly in a retracted position, wherein in the retracted position at least a portion of the inner sleeve is positioned within the inner region of the outer sleeve and wherein a handle portion of the trocar assembly is in contact with at least a portion of the gas tight assembly.   
     
     
         27 . The method of  claim 23 , further comprising:
 pumping a gas into a third flow path defined by an inner region of the inner sleeve and an inner region of the outer sleeve, wherein the third flow path is not in fluid communication with the first flow path or the second flow path.