Cardiovascular catheter
First Claim
1. A catheter suitable for use during surgery and having a distal end portion and a proximal end portion having a larger diameter than said distal end portion and being joined by an intermediate integrally formed partially tapered body portion, said distal portion having an end opening and at least one side opening communicating with the inside of said catheter, said proximal portion being adapted to be connected to an externally operative device, a non-inflatable ring fixedly secured on the outer surface of the distal end of the catheter but proximal to the side opening, said ring tapering from a distal end of said ring to an enlarged diameter portion and having a proximal wall portion lying substantially perpendicular to said catheter, said ring being adapted to penetrate the incision together with the tip and distal end of the catheter, and a second ring slidably mounted on the catheter proximal to said first ring and having a distal wall portion lying substantially perpendicular to said catheter, said second ring being in snug forced slip fit with the catheter outer surface permitting it to be moved with moderate force axially along the catheter.
1 Assignment
0 Petitions
Accused Products
Abstract
A cardiovascular catheter for use particularly in open heart surgery and related operations requiring varying forms of cardiopulmonary bypass. The catheter has a fixed ring provided on the catheter proximal to drainage inlets and may have a sliding ring snug fit on the catheter proximal to the fixed ring for securing the catheter to a penetrated portion of the anatomy, such as the heart wall, between the two rings to assist in holding the catheter in place. In one form of the invention, the fixed ring is used alone to secure the catheter in place, for instance, during a drainage or perfusion application.
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Citations
3 Claims
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1. A catheter suitable for use during surgery and having a distal end portion and a proximal end portion having a larger diameter than said distal end portion and being joined by an intermediate integrally formed partially tapered body portion, said distal portion having an end opening and at least one side opening communicating with the inside of said catheter, said proximal portion being adapted to be connected to an externally operative device, a non-inflatable ring fixedly secured on the outer surface of the distal end of the catheter but proximal to the side opening, said ring tapering from a distal end of said ring to an enlarged diameter portion and having a proximal wall portion lying substantially perpendicular to said catheter, said ring being adapted to penetrate the incision together with the tip and distal end of the catheter, and a second ring slidably mounted on the catheter proximal to said first ring and having a distal wall portion lying substantially perpendicular to said catheter, said second ring being in snug forced slip fit with the catheter outer surface permitting it to be moved with moderate force axially along the catheter.
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2. A catheter suitable for use during surgery and having a distal end portion and a proximal end portion having a larger diameter than said distal end portion and being joined by an intermediate integrally formed partially tapered body portion, said distal portion having an end opening and at least one side opening communicating with the inside of said catheter, said proximal portion being adapted to be connected to an externally operative device, holding means for stabilizing the position of the catheter against movement at the site of penetration through an incision in a hollow viscus such as a heart or blood vessel, including a non-inflatable ring secured on the outer surface of the catheter adjacent the distal end of the catheter but proximal to the side opening, said ring tapering from a distal end of said ring to an enlarged diameter portion and having a proximal wall portion lying substantially perpendicular to said catheter, said ring being adapted to penetrate the incision together with the tip and distal end of the catheter, and a second ring slidably mounted on the catheter proximal to said first ring and having a distal wall portion lying substantially perpendicular to said catheter, said second ring being in snug forced slip fit with the catheter outer surface permitting it to be moved with moderate force axially along the catheter toward the said first ring to clamp the walls of the hollow viscus therebetween.
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3. A cannula suitable for use during surgery comprising a catheter having an elongate uniform diameter distal portion with at least one side inlet opening and with an open inlet end, said distal portion being adapted to be inserted through a surgical incision in the wall of a hollow viscus such as a heart or a blood vessel, said catheter having an elongate proximal portion of increased diameter as compared to the distal portion and being joined thereto by a gradually tapering integral portion, said proximal portion having a substantial axis length, said proximal portion being adapted to be connected to a tube leading to an external machine, holding means on said distal portion for stablizing the position of the catheter against movement including a non-inflatable ring secured on the outer surface of the catheter adjacent the distal end thereof but proximal to the inlet opening, said ring having a tapered distal portion and a planar transverse proximal portion, and a second ring slidably mounted on the catheter proximal to said first ring, said second ring being in snug forced slip fit with the catheter outer surface permitting it to be moved with moderate force axially along the catheter toward and away from said first ring, and said second ring having a planar transverse distal portion lying parallel to said planar portIon on said non-inflatable ring for engaging the surface of the wall surrounding said incision for holding said catheter in position.
Specification