Cannula assembly
First Claim
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1. A cannula assembly comprising:
- a housing comprising at least a first port and a cannula sleeve, the cannula sleeve comprising a second port, wherein said housing defines a fluid flow path between the first port and the second port, and said housing is arranged to allow a trocar to be removably passed through the second port; and
a cylindrical gas filter disposed in the housing, across the fluid flow path, wherein said gas filter comprises at least one gas filter element comprising at least one porous medium, and the gas filter has an opening allowing the trocar to be removably passed through the opening while the cannula assembly extends into a patient'"'"'s body cavity.
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Abstract
Cannulas, as well as cannula assemblies including gas filters, are disclosed.
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Citations
27 Claims
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1. A cannula assembly comprising:
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a housing comprising at least a first port and a cannula sleeve, the cannula sleeve comprising a second port, wherein said housing defines a fluid flow path between the first port and the second port, and said housing is arranged to allow a trocar to be removably passed through the second port; and
a cylindrical gas filter disposed in the housing, across the fluid flow path, wherein said gas filter comprises at least one gas filter element comprising at least one porous medium, and the gas filter has an opening allowing the trocar to be removably passed through the opening while the cannula assembly extends into a patient'"'"'s body cavity. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
passing at least one gas through the cannula assembly of claim 1.
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18. The method of claim 17, comprising passing a de-sufflation gas through the cannula assembly.
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19. The method of claim 17, further comprising passing a surgical instrument through the gas filter opening and through the second port of the cannula assembly.
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20. The method of claim 17, comprising passing an insufflation gas through the cannula assembly.
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21. A method for treating gas comprising passing the gas through the cannula assembly of claim 9, wherein gas passes through the two or more openings.
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22. A method for treating gas comprising passing the gas through the cannula assembly of claim 14, wherein gas passes through the two or more openings.
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23. A method for filtering gas comprising passing a gas through a first port of a housing, through a gas filter in the housing to provide a filtered gas, wherein the gas filter has an opening allowing a trocar to be removably passed therethrough, passing the filtered gas through a second port of the housing, and into a patient'"'"'s abdominal cavity.
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24. A cannula assembly comprising:
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a housing comprising at least a first port and a cannula sleeve, the cannula sleeve comprising a second port, wherein said housing defines a fluid flow path between the first port and the second port, and said housing is arranged to allow a surgical instrument comprising at least one of a trocar, laparoscope, optic probe, scalpel, laser, ultrasonic device, electrocautery device, and camera, to be removably passed through the second port; and
a cylindrical gas filter disposed in the housing, across the fluid flow path, wherein said gas filter comprises at least one gas filter element comprising at least one porous medium, and the gas filter has an opening allowing the surgical instrument to be removably passed through the opening while the cannula assembly extends into a patient'"'"'s body cavity.
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25. A method for filtering gas comprising
obtaining a cannula assembly comprising a housing comprising at least a first port and a cannula sleeve, the cannula sleeve comprising a second port, wherein said housing defines a fluid flow path between the first port and the second port, and said housing is arranged to allow a trocar to be removably passed through the second port; - and a cylindrical gas filter disposed in the housing, across the fluid flow path, wherein said gas filter comprises at least one gas filter element comprising at least one porous medium, and the gas filter has an opening allowing the trocar to be removably passed through the opening;
passing a gas through the first port of the housing, through the gas filter in the housing to provide a filtered gas, passing the filtered gas through the second port of the housing, and into a patient'"'"'s abdominal cavity.
- and a cylindrical gas filter disposed in the housing, across the fluid flow path, wherein said gas filter comprises at least one gas filter element comprising at least one porous medium, and the gas filter has an opening allowing the trocar to be removably passed through the opening;
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26. A method for filtering gas comprising
obtaining a cannula assembly comprising a housing comprising at least a first port and a cannula sleeve, the cannula sleeve comprising a second port, wherein said housing defines a fluid flow path between the first port and the second port, and said housing is arranged to allow a trocar to be removably passed through the second port; - and a cylindrical gas filter disposed in the housing, across the fluid flow path, wherein said gas filter comprises at least one gas filter element comprising at least one porous medium, and the gas filter has an opening allowing the trocar to be removably passed through the opening;
passing a gas from a patient'"'"'s abdominal cavity, through the second port of the housing, through the gas filter in the housing to provide a filtered gas, and passing the filtered gas through a first port of the housing. - View Dependent Claims (27)
- and a cylindrical gas filter disposed in the housing, across the fluid flow path, wherein said gas filter comprises at least one gas filter element comprising at least one porous medium, and the gas filter has an opening allowing the trocar to be removably passed through the opening;
Specification