US 11,724,063 B2
Interchangeable flush/selective catheter
Mubin I. Syed, Springfield, OH (US)
Filed by Mubin I. Syed, Springfield, OH (US)
Filed on Nov. 29, 2018, as Appl. No. 16/204,478.
Application 16/204,478 is a continuation of application No. 15/225,667, filed on Aug. 1, 2016, granted, now 10,173,031.
Claims priority of provisional application 62/352,492, filed on Jun. 20, 2016.
Prior Publication US 2019/0091441 A1, Mar. 28, 2019
Int. Cl. A61M 25/00 (2006.01)
CPC A61M 25/0026 (2013.01) [A61M 25/007 (2013.01); A61M 2025/0004 (2013.01); A61M 2025/0019 (2013.01); A61M 2025/0039 (2013.01); A61M 2025/0079 (2013.01); A61M 2202/0085 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A convertible catheter comprising:
an outer catheter comprising an open distal end, a proximal end, and at least one side therebetween, wherein the outer catheter comprises at least one flush hole on the at least one side closer to the open distal end than the proximal end;
an inner catheter comprising an open distal end and a proximal end, wherein the inner catheter is slidably movable within the outer catheter, wherein the inner catheter is connected to a pull knob located at the proximal end, wherein the pull knob is configured to move the inner catheter slidably within the outer catheter; and
an iris located within the outer catheter between the distal end of the outer catheter and the at least one flush hole, wherein the iris is normally closed but is configured to open to enable the inner catheter to slidably move out through the iris and the distal end of the outer catheter,
wherein the convertible catheter is converted for use as a flush catheter when the distal end of the inner catheter is slidably moved below the flush hole location using the pull knob to open the at least one flush hole, and
wherein the convertible catheter is converted for use as a selective catheter when the inner catheter is slidably moved through the iris to expose the open distal end of the inner catheter outside the iris and the open end of the outer catheter while closing the at least one flush hole on the at least one side of the outer catheter by an outer sidewall surface of the inner catheter,
wherein a solution comprising a flushing compound is deliverable through the open distal end of the inner catheter and through the at least one flush hole in the outer catheter when the convertible catheter is configured as a flush catheter.