Laser surgery plume evacuator with aspirator

• US 4,963,134 A
• Filed: 03/03/1989
• Issued: 10/16/1990
• Est. Priority Date: 03/03/1989
• Status: Expired due to Fees

• Current Assignee: Medical Incorporated, Recto Molded Products Incorporated
• Original Assignee: Medical Incorporated, Recto Molded Products Incorporated
• Inventors: Rogers, Paul, Backscheider, Frank A.
• Primary Examiner(s): Nozick, Bernard
• Application Number:
  US07/319,121
• Time in Patent Office: 592 Days
• Field of Search: 55/279, 55/473, 55/316, 55/467, 55/387, 55/356, 55/357, 604/317, 604/319, 604/405, 604/410
• US Class Current: 604/319
• CPC Class Codes: A61B 2218/008 for smoke evacuation
• CPC Class Codes: A61M 1/71 Suction drainage systems containers therefor A61M1/60, A61M1/64; negative pressure wound therapy systems A61M1/90
• CPC Class Codes: A61M 1/79 Filters for solid matter specially adapted for dental use A61C17/065
• CPC Class Codes: A61M 1/80 Suction pumps A61M1/64, A61M1/71, A61M60/00 take precedence

Abstract

A portable laser surgery evacuator includes an aspirator contained in the same housing which is positionable in an operating room near a surgical site. Surgical plume is evacuated from the site by vacuum, filtered through moisture, purifying and particle filters, chemically deodorized, and exhausted in cleaned form into the operating room environment. Fluid containing liquid is aspirated by pumping to a collector bag hung on a hose of the evacuator. Gaseous plume components of the fluid are vented from the collector to the evacuator to be cleaned with the plume. The venting is provided by a hose joining the evacuator inlet hose at a Venturi like connection. The evacuator includes a symmetrical reversible charcoal filter having a moisture absorbing cellulose filter at each end. A disposable aspirator pump of the rotating impeller type mounts on a motor shaft extending through the housing and is restrained against rotation by fixed hooks against which the pump fittings are urged by the torque of the motor.

Claims

1. A method of evacuating and aspirating a laser surgery site comprising:

evacuating through a vacuum filter assembly plume generated during a laser surgical procedure;

aspirating through an aspirator pump assembly fluid containing liquid and plume generated during the laser surgical procedure; and

ventilating at least a portion of plume aspirated into said aspirator pump assembly to said vacuum filter assembly to pass such aspirated plume portion through said vacuum filter assembly.

2. The method of claim 1 wherein said ventilating includes

collecting in an aspirant collector fluid and plume aspirated through said aspirator pump assembly;

and

venting said aspirant container to said vacuum filter assembly to pass through said vacuum filter assembly plume drawn off by said aspirator pump assembly and not retained in said aspirant collector.

3. The method of claim 1 further comprising separating a portion of the aspirated plume from the aspirated liquid before ventilating the aspirated plume portion into said aspirator pump assembly.

4. A method of evacuating and aspirating a laser surgery site comprising:

evacuating through a vacuum filter assembly plume generated during a laser surgical procedure and exhausting cleaned air therefrom into an operating room environment;

aspirating through an aspirator pump assembly fluid containing liquid and plume generated during the laser surgical procedure;

feeding from said aspirator pump assembly to said vacuum filter assembly gaseous components of plume aspirated into said aspirator assembly; and

cleaning in the vacuum filter assembly said gaseous plume components and exhausting the cleaned components into said operating room environment.

5. The method of claim 4 further comprising collecting the fluid containing liquid and plume aspirated through said aspirator assembly before feeding said gaseous plume components into said vacuum filter assembly.

6. The method of claim 5 further comprising venting gaseous plume components of the collected fluid into said filter assembly.

7. A laser surgery evacuator/aspirator comprising:

a portable housing positionable in the environment of an operating room near an operating site;

a vacuum filter assembly associated with said housing, said vacuum filter assembly including vacuum means and means for coupling to an outlet end of an evacuator vacuum hose which has an inlet end positionable adjacent an operating site for evacuating through the hose and said vacuum filter assembly plume generated during a laser surgical procedure;

an aspirator pump assembly associated with said housing, said aspirator pump assembly including motive means and means for coupling to a suction means which has an inlet end positionable adjacent the operating site for aspirating through the suction means liquid generated during the laser surgical procedure; and

power connecting means associated with said housing for providing power to both said vacuum means of said filter assembly and said motive means of said aspirator pump assembly whereby plume and liquid generated during laser surgery may be removed from the operating site without the need for a separate aspirator system or a separate power source therefor.

8. The laser surgery evacuator/aspirator of claim 7 wherein said motive means of said aspirator pump assembly includes:

an aspirator pump motor situated within said housing and having a rotatable shaft extending out of said housing for selectively coupling to a removable aspirant pump unit forming part of the aspiration suction means.

9. In combination with the laser surgery evacuator/aspirator of claim 7 wherein said motive means of said aspirator pump assembly includes an aspirator pump motor situated within said housing and having a rotatable shaft extending out of said housing, suction means for aspirating therethrough liquid generated during the laser surgical procedure, said suction means including:

a disposable impeller pump unit having inlet means for coupling to an aspirator tube having an inlet end positionable adjacent the operating site, said pump unit having a shaft being selectively couplable to said motor rotatable shaft.

10. The laser surgery evacuator/aspirator of claim 7 wherein said vacuum filter assembly includes:

at least one filter having a central section of filtering material and a pair of moisture sections axially spaced from each other on opposite sides of said central section, each capable of serving as either an inlet or outlet, said filter being configured symmetrically about a central section so that said filter is connectable in an orientation with either of said moisture sections toward said means for coupling to an outlet end of the evacuator vacuum hose.

11. The laser surgery evacuator/aspirator of claim 7, said aspirator pump assembly further including a pump unit connected to and being drivable by said motive means and supporting said means for coupling to the suction means, said aspirator pump assembly further including an aspirant collector coupled to said pump unit, whereby liquid aspirated through the suction means will collect in the aspirant collector, said aspirant collector including means for ventilating into said vacuum filter assembly plume drawn in by the suction means with the aspirated liquid whereby to pass such drawn in plume through said vacuum filter assembly.

12. The laser surgery evacuator/aspirator of claim 11 wherein said vacuum filter assembly further has means for supporting said aspirant collector thereon.

13. A laser surgery evacuator/aspirator comprising:

a housing positionable in the environment of an operating room near an operating site;

a vacuum filter assembly associated with said housing, said vacuum filter assembly having vacuum means and means for coupling to an evacuator vacuum hose which has an inlet end positionable adjacent an operating site for evacuating plume generated during the laser surgical procedure through said hose and said vacuum filter assembly;

an aspirator pump motor situated within said housing, said aspirator pump motor having a rotatable shaft extending therefrom to receive a removable aspirant pump unit thereon; and

fixed means carried by said housing for cooperating with the removable aspirator pump unit to hold the removable aspirator pump unit to said rotatable shaft; and

power connecting means associated with said housing for providing power to both said vacuum means of said vacuum filter assembly and said aspirator pump motor whereby plume and liquid generated during laser surgery may be removed from the operating site without the need for a separate motive force for the aspirator pump or a separate power source therefor.

14. The laser surgery evacuator/aspirator of claim 13 wherein said fixed means includes a hook shaped member projecting from said housing to define a pump unit conduit receiver zone.

15. The laser surgery evacuator/aspirator of claim 13 wherein said housing is portable.

16. A laser surgery evacuator/aspirator comprising:

a housing positionable in the environment of an operating room near an operating site;

a vacuum filter assembly carried by said housing, said vacuum filter assembly having vacuum means and an evacuator vacuum inlet hose coupled to said vacuum means, said inlet hose having an inlet end positionable adjacent an operating site for evacuating therethrough plume generated during a laser surgical procedure, said vacuum filter assembly further having filter means connected in series with said evacuator vacuum inlet hose and vacuum means for drawing plume through said inlet hose and said filter means to a clean air exhaust, said exhaust communicating with said operating room environment;

an aspirator pump assembly carried by said housing and having an aspirator inlet hose with an inlet end positionable adjacent the operating site for aspirating therethrough liquid generated during the laser surgical procedure, said aspirator pump assembly further having motive means for drawing liquid through said aspirator inlet hose; and

feed means coupled between said aspirator pump assembly and said vacuum filter assembly for feeding, to said vacuum filter assembly from said aspirator pump assembly, at least a portion of gaseous components of the aspirated liquid drawn into said aspirator inlet hose whereby the gaseous components are cleaned by said vacuum filter assembly before being exhausted into said operating room environment.

17. The laser surgery evacuator/aspirator of claim 16 wherein said housing is portable.

18. The laser surgery evacuator/aspirator of claim 16 wherein said filter means includes:

at least one filter having a central section of filtering material and a pair of moisture sections axially spaced from each other on opposite sides of said central section, each capable of serving as either an inlet or outlet, said filter being configured symmetrically about a central section so that said filter is connectable in an orientation with either of said moisture sections toward the evacuator vacuum inlet hose.

19. The laser surgery evacuator/aspirator of claim 16, said aspirator pump assembly including an outlet, said feed means including an aspirator collector having an inlet connected to said pump assembly outlet for collecting liquid aspirated through said aspirator inlet hose.

20. The laser surgery evacuator/aspirator of claim 19 wherein said aspirator collector comprises a bag suspended from said evacuator vacuum inlet hose.

21. The laser surgery evacuator/aspirator of claim 19 wherein said feed means further includes means connecting an outlet of said aspirator collector to said evacuator vacuum inlet hose.

22. The laser surgery evacuator/aspirator of claim 21, said aspirator collector comprising a flexible wall plastic bag having a membrane dividing said bag into at least two halves, one said half communicating directly with said collection inlet, another said half communicating directly with said collection outlet, whereby the gaseous components are those that pass through said membrane from said one half to said another half.

23. The laser surgery evacuator/aspirator of claim 22, said ba being generally transparent, said membrane being generally vertically disposed and further being generally translucent, said membrane including a vertical, generally transparent slot therein.

24. The laser surgery evacuator/aspirator of claim 16 wherein said aspirator pump assembly includes:

a disposable pump removably mounted on said housing, removably connected to said motive means, and connected in series between said aspirator inlet hose and said feed means.

25. The laser surgery evacuator/aspirator of claim 24 wherein said motive means of said aspirator pump assembly includes a rotary pump motor mounted within said housing and having a rotary output shaft extending through said housing, said disposable pump having a pump body and a pump shaft rotatable in said pump body, said pump shaft being removably connectable to said motor shaft for supporting said disposable pump on said housing, said pump body having at least one abutment surface thereon;

said laser surgery evacuator/aspirator further comprising;

at least one stop fixed to said housing and adjacent said motor shaft for engaging said abutment surface of said disposable pump to restrain said pump body against rotation with the rotary output shaft of said motor.

26. The laser surgery evacuator/aspirator of claim 25 wherein said pump shaft is slidable axially on said motor shaft for connection thereto and rotation therewith.

27. A laser surgery evacuator/aspirator system comprising:

a portable housing positionable in the environment of an operating room near an operating site;

a vacuum filter assembly associated with said housing and including;

a vacuum source inside said housing;

filter means inside said housing for filtering air drawn in by said vacuum source;

means for expelling filtered air out of said housing and into said operating room environment; and

means communicating said vacuum source to an evacuator inlet;

an aspirator pump assembly comprising;

a motor inside said housing and having a rotatable shaft extending out of said housing;

a disposable impeller pump unit having a pump body, said pump unit having inlet and outlet arms extending from said pump body, said pump unit further having a shaft extending from said pump body generally perpendicular said arms and slidably received on said rotatable motor shaft for rotation therewith;

an aspirator tube having a nozzle end positionable adjacent the operating site for sucking therethrough liquid and drawn off plume generated during a laser surgical operating procedure, said tube having another end coupled to said pump unit inlet arm;

an evacuator hose having a nozzle end positionable adjacent the operating site for evacuating therethrough plume generated during the laser surgical procedure, said hose having another end coupled to said evacuator inlet;

an aspirant collector coupled to said pump unit outlet arm for collecting liquid and drawn off plume sucked in through said aspirator tube, said aspirant collector having a vent;

coupling means coupling said vent of said aspirant collector to said evacuator hose for drawing into said vacuum filter assembly drawn off plume sucked in through said aspirator tube and not retained in said aspirant collector whereby said drawn off plume is not exhausted unfiltered into said operating room environment.

28. The laser surgery evacuator/aspirator of claim 27, said coupling means has an outlet opening positioned within said evacuation hose and facing downstream in the direction of flow within said hose.

29. The laser surgery evacuator/aspirator of claim 27 wherein said collector includes a collector bag supported by and depending from said evacuator hose.

30. The laser surgery evacuator/aspirator of claim 27, said aspirant collector comprising:

a flexible-wall plastic bag having a membrane dividing said bag into at least two halves, one said half communicating directly with said pump unit outlet arm, another said half communicating directly with said vent.

31. The laser surgery evacuator/aspirator of claim 30, said bag being generally transparent, said membrane being generally vertically disposed and further being generally translucent, said membrane including a vertical, generally transparent slot therein.