Pneumoseal trocar arrangement
AssigneeSurgiQuest, Inc.
InventorsMichael J. Campbell, Donald N. Halgren, George A. J. Hartman, Ken Parker, Jack B. Stubbs, Ronald J. Thompson
Life of this patent
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Abstract
A cannula assembly for the maintenance of an operative pneumoperitoneum in a patient comprising an elongated cannula having a proximal end and a distal end. A removable valve is securely arranged in the proximal end of the cannula to provide a seal and minimize the escape of gas introduced into the patient's pneumoperitoneum when an operative instrument is passed therethrough.
Claims9
A method of maintaining an operative pneumoperitoneum in a patient undergoing a surgical procedure comprising the steps of:
- introducing a trocar through a portion of an abdominal wall of a patient;
- introducing a surgical instrument through a lumen in the trocar;
- introducing a pressurized gas from a controlled pressure source into the surgical instrument;
- directing the pressurized gas from the surgical instrument into the patient through a passageway between the surgical instrument and a wall of the lumen in the trocar, the pressurized gas from the surgical instrument forming a gas seal around the surgical instrument within the lumen of the trocar so as to directly contact the surgical instrument, while said pressurized gas simultaneously maintains an operative pneumoperitoneum in the patient by preventing a loss of pressurized gas from the pneumoperitoneum through the lumen in the trocar;
- and
- monitoring the pneumoperitoneum of the patient to provide feedback for maintaining the operative pneumoperitoneum.
A method of maintaining an operative pneumoperitoneum in a patient undergoing a surgical procedure comprising the steps of:
- introducing a trocar through a portion of an abdominal wall of a patient at a first site;
- introducing at least one surgical instrument through a lumen in the trocar;
- introducing a pressurized gas from a controlled pressure source into the at least one surgical instrument;
- directing the pressurized gas from the at least one surgical instrument into the patient through a gas passageway between the at least one surgical instrument and a wall of the lumen in the trocar so as to directly contact the at least one surgical instrument, the pressurized gas forming a gas seal around the at least one surgical instrument within the lumen in the trocar, while said pressurized gas simultaneously maintains the operative pneumoperitoneum by preventing a loss of pressurized gas from the pneumoperitoneum through the lumen in the trocar;
- introducing a cannula through the abdominal wall of the patient at a second site;
- monitoring gas pressure within the abdomen of the patient through the cannula;
- and
- controlling gas pressure within the abdomen of the patient based upon feedback received from the cannula so as to maintain the operative pneumoperitoneum with the pressurized gas from the at least one surgical instrument.
Dependencies are inferred from the claim text.