Laser smoke evacuation system and method
First Claim
1. A laser smoke evacuation system for removal of CO2 laser produced smoke from a patient cavity comprising:
- means including a tube insertable into said patient cavity for introducing a first flow of CO2 gas into said patient cavity;
means including a tube insertable into said patient cavity for removal of said first flow of CO2 gas from said patient cavity with any laser smoke mixed therewith;
means for separating said laser smoke from said first flow of CO2 gas;
means for returning said first flow of CO2 gas cleansed of said laser smoke to said patient cavity through said tube for introducing said first flow; and
means including a tube insertable into said patient cavity for introducing a second makeup flow of CO2 gas into said patient cavity to replace any of said first flow of CO2 gas lost by leakage and tissue absorption and to distend said cavity sufficiently for visualization and access to the working site in said cavity.
2 Assignments
0 Petitions
Accused Products
Abstract
A laser smoke evacuation system and method for laser smoke removal from the site of laser laparoscopy in a patient cavity. The system includes a CO2 gas pump connected through a control valve, a pressure sensor, and a bacterial filter to a laparoscopic tube inserted into the patient, a return line from a second laparoscopic tube in the patient through a smoke filter, a pressure sensor, a control valve, and a fluid trap into the return of the pump, and an insufflator connected into the patient to supply CO2 gas lost by leakage and tissue absorption an to provide required distention of the patient cavity. The method includes the steps of supplying a first flow of CO2 gas into a patient cavity to the operation sites, returning the first flow of CO2 gas with removed laser smoke from the cavity, cleansing the smoke from the first flow of CO2 gas, recirculating the cleansed first flow of CO2 gas back to the patient, and providing a second makeup flow of CO2 gas to the patient to replace CO2 gas from the first flow lost by leakage and tissue absorption and provide cavity distention.
677 Citations
20 Claims
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1. A laser smoke evacuation system for removal of CO2 laser produced smoke from a patient cavity comprising:
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means including a tube insertable into said patient cavity for introducing a first flow of CO2 gas into said patient cavity; means including a tube insertable into said patient cavity for removal of said first flow of CO2 gas from said patient cavity with any laser smoke mixed therewith; means for separating said laser smoke from said first flow of CO2 gas; means for returning said first flow of CO2 gas cleansed of said laser smoke to said patient cavity through said tube for introducing said first flow; and means including a tube insertable into said patient cavity for introducing a second makeup flow of CO2 gas into said patient cavity to replace any of said first flow of CO2 gas lost by leakage and tissue absorption and to distend said cavity sufficiently for visualization and access to the working site in said cavity. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A laser smoke evacuation system for removal of CO2 laser produced smoke from a laser operation site in a patient cavity comprising:
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a closed circuit CO2 gas recirculation system including pump means, a discharge line from said pump means, a tube connected with said discharge line and insertable into said patient cavity, a control valve, a pressure sensor, and a bacterial filter in said discharge line between said pump means and said patient, a return line to said pump means, a tube connected with said return line and insertable into said patient cavity, a smoke filter, a pressure sensor, a control valve, and a fluid trap in said return line; system control means connected with said closed circuit for operating said valves and said pump means responsive to predetermined operating conditions in said closed circuit; and an insufflator connected with a CO2 supply line, a tube connected with said insufflator and insertable into said patient cavity for supplying makeup CO2 gas to replace CO2 gas lost from said closed circuit system and absorbed by patient tissue and to provide a predetermined pressure for distention of said patient cavity for providing visualization and operating space at said operation site in said cavity. - View Dependent Claims (12, 13)
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14. A laser smoke evacuation system for removal of laser smoke from an operation site in a patient cavity comprising:
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a closed circuit CO2 gas system for recirculating CO2 gas through said patient cavity to remove laser smoke from said operation site including a CO2 gas pump, a discharge line from said pump to a first laparoscope tube for positioning into said patient cavity, a first solenoid valve in said discharge line, a pressure sensor in said discharge line downstream from said first solenoid valve, a bacteria removing filter in said discharge line downstream from said pressure sensor, and a first laparoscope tube for connection into said patient cavity for discharging CO2 gas into the operation site at the inward end of said laparoscope tube, a second laparoscope tube for connection into said patient cavity spaced from said first laparoscope tube, a CO2 gas return line from said second laparoscope tube to said pump for recirculating CO2 gas and laser smoke from said operation site, a laser smoke removal filter in said return line downstream from said second laparoscope tube, a pressure sensor in said return line downstream from said smoke filter, a second solenoid valve in said return line downstream from said pressure sensor, a fluid trap in said return line downstream from said second solenoid valve, a first shunt line from said first solenoid valve across to said return line between said pressure sensor in said line and said second solenoid valve, a second shunt line from said second solenoid valve across to said CO2 gas discharge line from said pump connected into said line between said pump and said first solenoid valve, a control module electrically connected with said pressure sensors, a relay connected with said control module and with said first and second solenoid valves for operating said valves responsive to predetermined pressure conditions sensed by said pressure sensors, and a manual switch connected with said control module for manually shutting down the said system; and an insufflator for a connection into said patient cavity through one of said laparoscope tubes for supplying makeup CO2 gas to replace gas lost through leakage and tissue absorption and to maintain a predetermined pressure in said patient cavity to provide operating room at said operation site and permit visualization of said operation site. - View Dependent Claims (15)
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16. A laser smoke evacuation method for removing laser smoke from an operation site in a patient cavity during laser laparoscopy comprising the steps of:
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recirculating CO2 gas in a closed system through said patient cavity across said operation site through a supply line tube into said patient cavity and a return line tube into said patient cavity; removing laser smoke from said CO2 gas after said gas is discharged from said patient cavity before recirculation of said gas back to said cavity; and supplying makeup gas thorugh a tube into said patient cavity independently of said recirculation system for replacing recirculating CO2 gas lost through leakage and tissue absorption and for maintaining a predetermined pressure in said patient cavity for distention of said cavity to permit adequate space at the operation site and provide for visualization of said site. - View Dependent Claims (17, 18, 19, 20)
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Specification