Surgery – Respiratory method or device – Ozone or ion generation
Patent
1980-07-21
1981-10-13
Michell, Robert W.
Surgery
Respiratory method or device
Ozone or ion generation
128 66, 128240, A61M 100
Patent
active
042942519
ABSTRACT:
The suction lavage system of this invention incorporates a pulsatile water lavage in combination with a suction system to improve the interface between a prosthesis, such as a hip replacement, and the interdigitating network of cancellous bone in which it is secured with acrylic cement. The water lavage effectively evacuates the medullary fat and hematopoietic tissue from the trabecular interstices of cancellous bone.
The suction irrigation system comprises a probe having two configurations which assist in impinging water on cancellous bone for evacuating fat and tissue along with water to improve the interface between the bone and cement. It has been found that weakening of the interface through stress may result in loosening of a prosthesis. The probe consists of a water conduit generally located on the outside of a suction conduit. The suction opening is located below the aperture for the pulsatile jet a distance large enough to insure that the apertures are not immersed in irrigating fluid; the apertures may be displaced to the side or down, or some combination of the two. The water jet pulses at about 2100 pulses per minute. In order to operate to maximum advantage, the pulsatile jet must function in an air environment. This is insured by the fact that the suction outflow is greater than the fluid inflow.
The method of this invention, then, relates to preparing cancellous bone to secure a prosthesis, which is achieved by reaming out of the cancellous bone to fit the prosthesis; suction lavaging the cavity with a probe which includes a pulsatile jet of water to evacuate the water, fat and tissue; and securing the acrylic bone cement to the prepared cancellous surface. In the method of this invention, it is possible to increase the interface shear strength of the lavaged preparation by 162%, which is significant in terms of a control which normally uses saline solution.
REFERENCES:
patent: 559417 (1896-05-01), Spencer
patent: 3085573 (1963-04-01), Meyer et al.
patent: 3208145 (1965-09-01), Turner
patent: 3416532 (1968-12-01), Grossman
patent: 3542017 (1970-11-01), Adams
patent: 3578884 (1971-05-01), Jacobson
patent: 3930505 (1976-01-01), Wallach
patent: 4012842 (1977-03-01), Vit
Zimmer Catalog-Section D, "The Trapezoidal-28.RTM. Total Hip Replacement" Amstutz, M.D. Feb., 1973, pp. 11-30, inventors in rea as first 3 inventors.
Brems John J.
Combs Steven P.
Geiger Jack M.
Greenwald A. Seth
Narten Nathaniel C.
Kruter J. L.
Michell Robert W.
LandOfFree
Method of suction lavage does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of suction lavage, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of suction lavage will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-925972