Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Reexamination Certificate
1999-06-04
2001-02-06
Dawson, Glenn K. (Department: 3763)
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
C604S164010, C606S159000
Reexamination Certificate
active
06183450
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates generally to catheters and, more specifically, to a device able to be readily connected to an end of a catheter for breaking up and removing obstructions within a lumen of the catheter and a method for breaking up an obstruction within a catheter.
2. Description of the Prior Art
Numerous types of catheter clearing and cleaning devices have been provided in the prior art. For example, U.S. Pat. Nos. 3,956,011; 4,698,058, 4,459,318; 4,509,947; 4,696,667; 5,030,213; 5,492,530 and 5,653,696 all are illustrative of such prior art. While these catheter clearing and cleaning devices may be suitable for the purposes for which they were designed, they would not be as suitable for the purposes of the present invention, as hereinafter described.
U.S. Pat. No. 3,956,011
Inventor: John S. Carleton
Issued: May 11, 1976
Method for cleaning a suction catheter including providing a sterilized environment for the catheter prior to use and convenient vessel for cleaning the catheter between each use with a single patient. The method further includes the steps of cleaning the catheter before each use by securing the suction catheter depending from a holder into an opening in a vessel, the opening mating with the holder, after using the catheter in connection with treating a patient; flowing a cleaning solution into the vessel to the level of soil on the catheter suspended therein; and suctioning substantially all of the cleaning solution from the vessel through the catheter prior to disposing of both catheter and cleaning system after their use in connection with a single patient.
U.S. Pat. No. 4,459,318
Inventor: Thomas E. Hyans
Issued: Jul. 10, 1984
A self-lubricating fill tube comprises an extended conduit having a coating of hydrophillic polymer extending over at least a portion of an outer surface of the conduit. A method for forming the self-lubricating fill tube by cleaning and irradiating the fill tube with gamma radiation in a dosage of about 0.5 Mrads. The fill tube is immersed in a ethylenically unsaturated monomer solution containing oxidizable metallic ions which initiate polymerization of the monomer onto the exposed surface of the fill tube. The fill tube is removed from the monomer solution leaving a hydrophilic polymer coating on the surface of the fill tube. The polymer coated fill tubes are rinsed with deionized water.
U.S. Pat. No. 4,509,947
Inventor: Gary A. Lattin
Issued: Apr. 9, 1985
A drug delivery catheter and storage bladder adapted for use in an implantable drug delivery system. The catheter and bladder are provided with piezoelectric layers adapted to be responsively coupled to a source of ultrasonic electrical signals. When so coupled, vibration of the piezoelectric layer dislodges any accumulation of crystallized drugs within the catheter and bladder.
U.S. Pat. No. 4,696,667
Inventor: Helmut Masch
Issued: Sep. 29, 1987
An intravascular catheter includes a flexible guide wire mounted for relative rotational and reciprocal movement within a reciprocal and flexible first tube or sheath. A rotary and flexible second tube is mounted for relative reciprocal movement on the first tube and has a rotary inner cutting head is closely fitted within an outer cutting head that is slidably mounted on the first tube. In carrying out the method of this invention, a blockage in a blood vessel, such as a coronary artery, is located and the outer cutting head engages the blockage to cut the blockage into fragments in response to rotation of the inner cutting head. The fragments are flushed-out from the inner cutting head and are drained through an evacuated annular passage defined between the first and second tubes.
U.S. Pat. No. 4,698,058
Inventor: Albert R. Greenfeld et al.
Issued: Oct. 6, 1987
Vibration is conveyed to the proximal orifices of an indwelling catheter to disintegrate accumulated clogging deposits, large suspended particles and contaminating bacteria, viruses, fungi, etc. orifices may be recessed, hooded or enclosed, and in some cases the catheter tip should be of absorptive material, to deter propagation of the vibration to the parts of the patient's body outside the catheter. Vibration may be conveyed to the orifices by (1) a solid fiber embedded in the catheter walls or positioned in an auxiliary lumen of the catheter; or (2) by a liquid in an auxiliary lumen - which may be formed as an annular space surrounding the main lumen. Preferably the apparatus measures the amount of vibration absorbed by the deposits or bacteria, etc., as a function of frequency, and automatically concentrates the vibration at frequencies where absorption is particularly high, to maximize the disintegration of deposits, particles, bacteria or other bioactive objects. Ultrasonic shear waves are thought more effective than compressional waves, but both may be used.
U.S. Pat. No. 5,030,213
Inventor: William E. Rumberger
Issued: Jul. 9, 1991
A catheter router assembly is disclosed for clearing salt blockages in a previously inserted catheter. A length of flexible, stainless steel cable is provided and a silver solder tip is applied at the proximal end of the cable. The silver solder tip is then machined to form a suitable cutting edge for cutting or drilling through the body salts which clog the catheter. A pin vise is secured along the length of the flexible power cable to facilitate insertion of the cable into the catheter and to provide hand rotative power to the cutting tip sufficient to cut through the blocking salts and to clear the catheter for further use. The pin vise may be readily moved along the length of the power cable as necessary to define sufficient free, unsupported forward portions of the cable to reach and clear the blockage throughout the entire length of the catheter.
U.S. Pat. No. 5,492,530
Inventor: Robert E. Fischell et al.
Issued: Feb. 20, 1996
The present invention is a method for using an improved guiding catheter that eliminates the need for an introducer sheath or a separate Tuohy-Borst “Y” adaptor, thus reducing the time and expense for performing artery opening procedures. Furthermore, the guiding catheter with straightening dilator as described herein allows the hole in the wall of the femoral artery in the arm to be approximately 2 French sizes smaller in diameter as compared to the hole that would be created if an introducer sheath is also used. The advantages of the present invention are accomplished by utilizing a guiding catheter with a dilator that has a stiffened and/or curved distal section that can be used to straighten the distal section of the guiding catheter as it is advanced through the arterial system. The guiding catheter plus dilator can then be used in a manner similar to an introducer sheath to percutaneously enter the artery by being advanced over a previously placed guide wire. Once the distal ends of the dilator and the guiding catheter are placed near the ostium of the coronary artery, the dilator and guide wire are withdrawn which allows the guiding catheter to assume its normal bent shape (e.g., a Judkin's bend) near its distal end. The cardiologist can then, by well known techniques, place the guiding catheter's distal end in the ostium of a coronary artery. Any of several well known procedures can then be performed including angiography, balloon angioplasty, atherectomy or stent placement.
U.S. Pat. No. 5,653,696
Inventor: Samuel Shiber
Issued: Aug. 5, 1997
A process and apparatus for removing obstruction material from a stent which is located in a vessel in a body. The process generally involves threading a flexible casing into the material, and optionally, passing a tubular blade over the material to separate the material from the stent, and then withdrawing the flexible casing and the material out of the stent.
SUMMARY OF THE PRESENT INVENTION
The present invention relates generally to catheters and, more specifically, to a device able to be readily connected to an end of a catheter for breaking up and removing obstructions within a lu
Dawson Glenn K.
Kroll Michael I.
Maynard Jennifer
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