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US 6,685,665 B2Granted
Cannula assembly
AssigneePall Corporation
InventorsCharles S. Booth, David McDonough
Life of this patent
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Abstract
Cannulas, as well as cannula assemblies including gas filters, are disclosed.
Claims27
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.
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.
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 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.
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.
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.
Dependencies are inferred from the claim text.