Hydrodynamic suction catheter
First Claim
1. A drainage catheter comprising a basic tubular body having a distal end, a proximal end, a pressure channel in said tubular body and a discharge channel in said tubular body, said distal end having a bending of said pressure channel to communicate with said discharge channel, a nozzle ejector formation in said distal end of said catheter after said bend in said pressure channel and having an orifice facing proximally into said discharge channel, said distal end further having an inlet opening disposed adjacent said orifice of said nozzle ejector formation, said basic tubular body having, at said proximal end, a pressure inlet to said pressure channel and a discharge outlet from said discharge channel, coupling means coupled to said proximal end of said basic tubular body and including a first, pressure channel for coupling a source of fluid under pressure to said pressure inlet at said proximal end of said catheter tubular body, a second, discharge channel for coupling said discharge outlet at said proximal end of said tubular body to a reservoir, and a third, curved channel for coupling, at said pressure inlet, the source of fluid under pressure to, at said discharge outlet, the reservoir, whereby fluid under pressure flowing through said third channel creates a suction at said discharge outlet to educe fluid from said discharge channel to the reservoir.
3 Assignments
0 Petitions
Accused Products
Abstract
The drainage catheter comprises a basic tubular body having a distal end, a proximal end, a pressure channel in the tubular body and a discharge channel in the tubular body, the distal end having a bending of the pressure channel to communicate with the discharge channel. A nozzle ejector formation is provided in the distal end of the catheter after the bend in the pressure channel and having an orifice facing proximally into the discharge channel. The distal end further has an inlet opening disposed adjacent the orifice of the nozzle ejector formation. The basic tubular body has, at the proximal end, a pressure inlet to the pressure channel and a discharge outlet from the discharge channel. Coupling structure is coupled to the proximal end of the basic tubular body and includes a first, pressure channel for coupling a source of fluid under pressure to the pressure inlet at the proximal end of the catheter tubular body, a second, discharge channel for coupling the discharge outlet at the proximal end of the tubular body to a reservoir, and a third, curved channel for coupling, at the pressure inlet, the source of fluid under pressure to, at the discharge outlet, the reservoir, whereby fluid under pressure flowing through the third channel creates a suction at the discharge outlet to educe fluid from the discharge channel to the reservoir.
87 Citations
9 Claims
- 1. A drainage catheter comprising a basic tubular body having a distal end, a proximal end, a pressure channel in said tubular body and a discharge channel in said tubular body, said distal end having a bending of said pressure channel to communicate with said discharge channel, a nozzle ejector formation in said distal end of said catheter after said bend in said pressure channel and having an orifice facing proximally into said discharge channel, said distal end further having an inlet opening disposed adjacent said orifice of said nozzle ejector formation, said basic tubular body having, at said proximal end, a pressure inlet to said pressure channel and a discharge outlet from said discharge channel, coupling means coupled to said proximal end of said basic tubular body and including a first, pressure channel for coupling a source of fluid under pressure to said pressure inlet at said proximal end of said catheter tubular body, a second, discharge channel for coupling said discharge outlet at said proximal end of said tubular body to a reservoir, and a third, curved channel for coupling, at said pressure inlet, the source of fluid under pressure to, at said discharge outlet, the reservoir, whereby fluid under pressure flowing through said third channel creates a suction at said discharge outlet to educe fluid from said discharge channel to the reservoir.
Specification