Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Reexamination Certificate
1999-04-14
2001-07-10
Mendez, Manuel (Department: 3763)
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
C604S256000
Reexamination Certificate
active
06258072
ABSTRACT:
FIELD OF THE INVENTION
This invention is directed to a catheter protective device. More particularly, this invention is directed to a device for protecting the proximal sections of catheters and minimizing blood loss during catheter exchanges.
BACKGROUND OF THE INVENTION
During certain invasive intravascular procedures such as percutaneous transluminal coronary angioplasty (PTCA), a number of devices are inserted into and removed from the patient's cardiovascular system through an opening, for example, in the femoral artery. In a typical procedure, a guide catheter with a diameter of approximately 8 French will be advanced distally within the patient's arterial system and then a guidewire will be advanced within the guide catheter, to the point that the distal portion of the guidewire will be maneuvered to a point distal to the distal end of the guide catheter. Then, dependent upon the particular procedure being performed, one or more different catheters will be advanced over the guidewire, including situations where one catheter may be “exchanged” for another over the guidewire.
Typically at the proximal end of the guide catheter there will be a “Y” adaptor having two or more manifolds or ports for the introduction of and removal of guidewires, catheters, and the like. In some instances an additional Y-adaptor may be linked to another Y-adaptor.
One characteristic of the Y-adaptors is that they are preferably able to tighten, that is, “clamp down”, onto a device such as a catheter to be inserted, to hold the catheter in position as well as to minimize blood leakage and to allow simultaneous monitoring of blood pressure. Existant Y-adaptors have the drawback that they sometimes will damage expensive, mechanically fragile catheters when the clamp is tightened or inhibit intracatheter movement. In addition, there may be a significant blood loss, particularly during certain catheter exchanges.
In recognition of the aforementioned problems at least one company has developed a modified Y-adaptor that has an O-ring arrangement. However, that arrangement is specific to that one particular company's Y-adaptor. Also, some cardiologists have adopted commercially available Y-adaptors by adding additional O-rings to minimize bleed-back during catheter exchanges. However, this is a cumbersome and unacceptable procedure.
OBJECT OF THE INVENTION
It is an object of this invention to provide a catheter protective device.
It is also an object of this invention to provide a device for minimizing damage to catheters that are secured by Y-adaptors in vascular procedures.
It is a further object of this invention to minimize blood loss during certain intravascular procedures.
It is a yet further object of the converter to provide a simple device for modifying existant Y-adaptors to reduce blood loss and to minimize catheter damage.
These and other objects of the invention will become more apparent from the description above.
SUMMARY OF THE INVENTION
This invention is directed to a device for protecting catheters, particularly during invasive cardiological procedures. According to the invention, a device is designed to be positioned by control of the proximal portion of a guide catheter. The device comprises a tubular member to be positioned within the proximal portion of a Y-adaptor as well as a Y-adaptor containing such a tubular member. The tubular member is held in position by an annular valvular or locking mechanism. Preferably there is an O-ring or a one-way valve in the annular space between the tubular member and the proximal portion of the Y-adaptor. It is also preferable that the lumen of the tubular member will contain a hemostatic valvular mechanism. Further, preferably the tubular member will comprise a reasonably stiff material that will resist crushing of any catheter or other device that might be inserted through the lumen of the tubular member.
REFERENCES:
patent: 5843046 (1998-12-01), Motisi et al.
Cowman, Liebowitz & Latman, P.C.
Dippert William H.
Mendez Manuel
The Trustees of Columbia University in the City of New York
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