Bone cleaning and drying system

• US 5,554,111 A
• Filed: 03/16/1995
• Issued: 09/10/1996
• Est. Priority Date: 03/16/1995
• Status: Expired due to Term

• Current Assignee: Zimmer Technology Incorporated (Zimmer Biomet Holdings, Inc.)
• Original Assignee: Mayo Foundation For Medical Education And Research (Mayo Clinic)
• Inventors: Morrey, Bernard F., Schultz, Frederick M., McLeod, John J. Jr.
• Primary Examiner(s): YASKO JR, JOHN D
• Application Number:
  US08/405,500
• Time in Patent Office: 544 Days
• Field of Search: 604/35, 604/21, 604/26, 604/28, 604/118, 604/119, 433/29, 433/80, 433/84, 433/85, 433/91, 623/16, 623/18, 623/19-23
• US Class Current: 604/26
• CPC Class Codes: A61B 90/05 Splash shields for protection of the surgeon, e.g. splash guards connected to the apparatus A41D13/11 takes precedence
• CPC Class Codes: 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
• CPC Class Codes: A61F 2002/4685 by means of vacuum
• CPC Class Codes: 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

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

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, a suction control valve, a gas supply hose to a gas supply source of a compressed gas, and means to attach the suction control valve to a vacuum source;

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 applicator nozzle in a reversed flow direction;

e) surrounding the proximal end of the applicator shaft, a hollow deflector shield 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;

f) the distal surface of said hollow deflector shield having a plurality of apertures;

g) the interior of the hollow deflector shield connected through a flexible suction hose to said suction control valve and to a vacuum source;

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 within the suction system for removal, prior to the insertion of the bone cement and the prosthetic implant.

2. The combination of claim 1 including a plurality of side slits gradually angled from approximately 25°

to the axis of the applicator shaft at the distal end to approximately 60°

to the axis of the applicator shaft at the proximal end of the applicator nozzle.

3. The combination of claim 1 wherein the applicator shaft of the applicator has a plurality of apertures spaced proximally from the distal end of the applicator shaft, said apertures covered by a shaft cup, the distal end of the shaft cup being attached to the applicator shaft distally of the apertures, the proximal end of the shaft cup being spaced from the applicator shaft to cause a reversed flow direction to the compressed gas exiting the apertures.

4. 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.

5. The combination of claim 1 wherein a drape is substituted for the hollow deflector shield, said drape having a central section of absorbent material, and a peripheral section of clear plastic.

6. The combination of claim 1 wherein the gas supply source is a pressurized cartridge and there is neither a suction control valve nor a flexible suction hose and the drape is substituted for the hollow deflector shield.

7. The method of cleaning, emptying and drying the intramedullary canal and cancellous bone, during joint replacement surgery, including means for introducing compressed gas into the base of the cavity in a reversed flow direction and means adjacent the opening of the wound to collect and remove air, blood, fluids, fat, marrow, tissue and bone debris entrained in the stream of compressed gas exiting the cavity in a reversed flow direction.