Surgery – Means for introducing or removing material from body for... – Material introduced into and removed from body through...
Reexamination Certificate
2003-04-07
2004-01-13
Bockelman, Mark (Department: 3762)
Surgery
Means for introducing or removing material from body for...
Material introduced into and removed from body through...
C604S113000, C433S032000, C433S080000
Reexamination Certificate
active
06676629
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention is directed toward a method for liquefying target tissue within a body and more particularly, toward a method of heating a biocompatible fluid and presenting such to target tissue, thereby liquefying the target tissue and aspirating it while leaving non-target tissue intact.
Prior thermal energy sources used in surgery have been “dry-heat” devices. Some examples are: thermal lasers, ultrasound, microwave, radio frequency, and electrosurgery devices. These dry-heat energy sources transfer heat from a surgical instrument to a tissue primarily by the heat transfer modalities of conduction and radiation. Thermal lasers, ultrasound, and microwave energy sources can liquefy tissue, but only at very high energy levels. If any of these dry-heat energy sources are placed in direct contact with target surgical tissue, there is no tissue differentiation. That is, healthy as well as unhealthy tissue will be liquefied. For example, collapsing cavitation bubbles in front of an ultrasound surgical instrument release a thermal energy of 13,000° F. per bubble. With such a high thermal energy input there is no differentiation of tissue within the surgical tissue field. That is, all tissue target and non-target, within the target field melts or liquefies. The thermal energy in thermal lasers and ultrasound is inherently high, so the heat cannot be “turned down” or reduced. In microwave, radio frequency, and electrosurgery the level of thermal energy may be reduced but in so doing, liquefaction of tissue is not achieved at all. Rather, cauterization or coagulation of the tissue results.
U.S. Pat. No. 4,924,863 discloses a method for removing artherosclerotic plaque from a patient by heating the plaque under pressure for a limited period of time. When the plaque is heated, it liquefies without causing immediate death of the underlying tissue. The liquefied plaque is then aspirated from the body through a catheter. The means used for heating the plaque is microwave or radio frequency energy. As discussed above, however, in an effort to control the level of energy being produced, all of the plaque may not liquefy.
U.S. Pat. No. 5,540,679 discloses the use of a balloon catheter for heating tissue in a patient's body. A heating device is located within the balloon and is arranged for heating fluid inside the balloon. When the fluid is heated, unwanted tissue, such as a tumor or an enlarged prostate gland, is heated by thermal conduction from the fluid through a wall of the balloon. The heat destroys the tissue which is eventually absorbed into the patient's body. This method uses conduction and as explained above, such a method creates such a high level of energy that there is no tissue differentiation. As a result, healthy tissue may be heated and ultimately destroyed.
U.S. Pat. No. 4,886,491 discloses a method of liposuction using an ultrasonic probe. An ultrasonic probe tip is vibrated at a high frequency and a low amplitude. This method separates the fatty tissue and creates heat which melts some of the fatty tissue. A saline irrigating solution is applied to the area which emulsifies the melted fatty tissue. The emulsified solution is then aspirated. Again, because of the high thermal energy input into the system there is no differentiation of tissue into target and non-target tissue.
SUMMARY OF THE INVENTION
The present invention is designed to overcome the deficiencies of the prior art discussed above. It is an object of this invention to provide a method for liquefying target tissue within a living body while leaving non-target tissue intact, and aspirating the liquefied tissue as it is liquefied.
It is another object of the invention to provide a method for liquefying target tissue by heating a biocompatible fluid and presenting the same to the target tissue.
It is a further object of the invention to provide a method for liquefying fatty tissue and aspirating the same from a patient.
In accordance with the illustrative embodiments, demonstrating features and advantages of the present invention, there is provided a method for liquefying target tissue within a human body. The method includes heating a biocompatible fluid, presenting this fluid to the target tissue which liquefies the tissue, while leaving non-target tissue intact, and aspirating the liquefied tissue as soon as it is liquefied.
The present invention discloses a novel energy source which allows for efficient, safe, minimally invasive, and cost-effective surgery for surgical procedures where the goal of the surgery is to remove unwanted tissue from the body, within a surgical tissue field. The present invention also allows for the differentiation of target tissue from non-target tissue. In other words, the surgical tissue field is defined as the actual anatomical landscape with which the surgeon is physically interacting. Surgical tissue fields are comprised of multiple homogeneous tissue groups. Each of these homogeneous tissue groups has its own melting point. With the present invention, the melting point of a particular tissue group or unwanted tissue is determined in order to liquefy the tissue and rid the patient of the same.
Other objects, features, and advantages of the invention will be readily apparent from the following detailed description of a preferred embodiment thereof taken in conjunction with the drawings.
REFERENCES:
patent: 3247851 (1966-04-01), Seibert
patent: 3351063 (1967-11-01), Malaker et al.
patent: 3589363 (1971-06-01), Banko et al.
patent: 3624907 (1971-12-01), Brass et al.
patent: 3693613 (1972-09-01), Kelman
patent: 3906954 (1975-09-01), Baehr et al.
patent: 4019514 (1977-04-01), Banko
patent: 4078564 (1978-03-01), Spina et al.
patent: 4135516 (1979-01-01), Spina et al.
patent: 4191176 (1980-03-01), Spina et al.
patent: 4215476 (1980-08-01), Armstrong
patent: 4276880 (1981-07-01), Malmin
patent: 4386927 (1983-06-01), Eichenbaum
patent: 4411652 (1983-10-01), Kramer et al.
patent: 4496342 (1985-01-01), Banko
patent: 4597388 (1986-07-01), Koziol et al.
patent: 4650461 (1987-03-01), Woods
patent: 4694828 (1987-09-01), Eichenbaum
patent: 4699589 (1987-10-01), Friedman et al.
patent: 4744360 (1988-05-01), Bath
patent: 4764165 (1988-08-01), Reimels et al.
patent: 4804364 (1989-02-01), Dieras et al.
patent: 4817599 (1989-04-01), Drews
patent: 4869715 (1989-09-01), Sherburne
patent: 4886491 (1989-12-01), Parisi et al.
patent: 4924863 (1990-05-01), Sterzer
patent: 4950267 (1990-08-01), Isihara et al.
patent: 4995880 (1991-02-01), Galib
patent: 5022413 (1991-06-01), Spina, Jr. et al.
patent: 5061255 (1991-10-01), Greenfeld et al.
patent: 5169396 (1992-12-01), Dowlatshahi et al.
patent: 5222953 (1993-06-01), Dowlatshahi
patent: 5257988 (1993-11-01), L'Esperance, Jr.
patent: 5324319 (1994-06-01), Mason et al.
patent: 5451208 (1995-09-01), Goldrath
patent: 5540679 (1996-07-01), Fram et al.
patent: 5607420 (1997-03-01), Schuman
patent: 5649923 (1997-07-01), Gregory et al.
patent: 5653692 (1997-08-01), Masterson et al.
patent: 6074358 (2000-06-01), Andrew et al.
patent: 6224378 (2001-05-01), Valdes et al.
patent: 6319222 (2001-11-01), Andrew et al.
patent: 6440103 (2002-08-01), Hood et al.
patent: 6497572 (2002-12-01), Hood et al.
patent: 6544211 (2003-04-01), Andrew et al.
Andrew Mark S.
Andrew Mylina
Bockelman Mark
Lehrer Norman E.
LandOfFree
Tissue liquefaction and aspiration for dental treatment does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Tissue liquefaction and aspiration for dental treatment, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Tissue liquefaction and aspiration for dental treatment will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3204314