# US 5,704,909 A · Bone cleaning and drying system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,704,909 A - Document ID: US5704909A - Status: Granted - Kind: A - Application number: 08/650,342 - Filed: 1996-05-20 - Granted: 1998-01-06 - Earliest claimed: 1995-03-16 - Assignees: Mayo Foundation for Medical Education and Research - Inventors: Bernard F. Morrey; John J. McLeod, Jr.; Frederick M. Schultz - Web page: https://patentgrep.com/patent/US5704909A ## CPC - A61F 2/4675: {for cleaning or coating bones, e.g. bone cavities, prior to endoprosthesis implantation or bone cement introduction (for cleaning teeth cavities A61C17/00; irrigators A61M3/02)} - A61M 1/85: {with gas or fluid supply means, e.g. for supplying rinsing fluids or anticoagulants (for negative pressure wound therapy A61M1/92, A61M1/94; combined with tracheal tubes A61M16/0463; dental instruments with combined rinsing and aspirating A61C17/0208)} - A61B 90/05: {Splash shields for protection of the surgeon, e.g. splash guards connected to the apparatus} - A61F 2002/4685: {by means of vacuum} - A61F: FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS (dental prosthetics A61C) - A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)} - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) ## Abstract A bone cleaning and drying system for cleaning drying and emptying bones during joint replacement surgery, which includes an applicator for applying compressed gas, namely carbon dioxide, to the intramedullary canal and the cancellous bone, with an applicator nozzle at the distal end, the applicator nozzle having a plurality of end discharge slits and a plurality of angled side discharge slits to provide reverse flow, which provides a pressure gradient from the distal end to the proximal end, which aspirates and directs the entrained air, blood, fluids, fat, marrow, tissue and bone debris onto a drape or a hollow deflector shield surrounding the applicator, the front surface of the hollow deflector shield being apertured to allow the entrained materials to pass therethrough, the interior of the hollow deflector shield being connected to a flexible suction hose, and replaces room air with carbon dioxide in bone. ## Claims ### Claim 1 A bone cleaning and drying system for use during joint replacement surgery and other types of surgery to remove and collect the air, blood, fluids, fat, marrow, tissue and bone debris from the cavities of the bone, comprising in combination: a) a handpiece having a gas control valve, and a gas supply hose connected to a gas supply source of a compressed gas; b) said gas control valve connected to an applicator for carrying the compressed gas to the cavity of the bone; c) said applicator having a applicator shaft whose proximal end is connected to the handpiece and whose distal end terminates in a applicator nozzle; d) said applicator nozzle having an cylindrical enlargement near its distal end, the proximal end of the enlargement having apertures which direct compressed gas in a reversed flow direction; WHEREBY the cavity of the bone and the openings in the surrounding cancellous bone are cleaned emptied and dried during the surgery, and air, blood, fluids, fat, marrow, tissue and bone debris from the cavities of the bone are entrained for removal, prior to the insertion of the bone cement and the prosthetic implant. ### Claim 2 (depends on 1) The combination of claim 1 wherein said proximal end of the enlargement of said applicator nozzle has apertures which direct the majority of the compressed gas in a reversed flow direction. ### Claim 3 (depends on 1) The combination of claim 1 including a drape, said drape having a central section of absorbent material, and a peripheral section of clear plastic. ### Claim 4 (depends on 1) The combination of claim 1 wherein said handpiece has a suction control valve, and means to attach the suction control valve to a vacuum source. ### Claim 5 (depends on 1) The combination of claim 1 wherein the distal end of the applicator shaft has a aperture for the exiting of the compressed gas in a direction distal and lateral of the applicator shaft. ### Claim 6 (depends on 3) The combination of claim 3 wherein the gas supply source is a pressurized cartridge. ### Claim 7 (depends on 4) The combination of claim 4 wherein a hollow deflector shield surrounds the proximal end of the applicator shaft, onto which the entrained material from the cavities of the bone are directed when the applicator nozzle is inserted into said cavities, and compressed gas is discharged through the slit, the interior of the hollow deflector shield connected through a flexible suction hose to said suction control valve and to a vacuum source. ### Claim 8 A bone cleaning and drying system for use during joint replacement surgery and other types of surgery to remove and collect the air, blood, fluids, fat, marrow, tissue and bone debris from the cavities of the bone, comprising in combination: a) a handpiece having a gas control valve, and a gas supply hose connected to to a gas supply source of a compressed gas; b) said gas control valve connected to an applicator for carrying the compressed gas to the cavity of the bone; c) said applicator having a applicator shaft whose proximal end is connected to the handpiece and whose distal end terminates in a applicator nozzle; d) said applicator nozzle having a slit on the side of the applicator shaft, said slit angled to the axis of the applicator shaft, to direct the compressed gas exiting the slit of the applicator nozzle in a reversed flow direction; WHEREBY the cavity of the bone and the openings in the surrounding cancellous bone are cleaned emptied and dried during the surgery, and air, blood, fluids, fat, marrow, tissue and bone debris from the cavities of the bone are removed, prior to the insertion of the bone cement and the prosthetic implant. ### Claim 9 (depends on 8) The combination of claim 8 wherein the gas supply source is a pressurized cartridge.