Catheter with vessel lining for cell collection and methods for using same
A system and method for cell collection within a vessel. The system including a cannula having a pathway extending from a first end to a second end, a elongated member situated longitudinally within the pathway of the cannula, a sleeve coupled to the second end of the cannula and a balloon situated within the sleeve.
1 . A system for cell collection within a vessel, the system comprising:
a cannula having a pathway extending between a first end and a second end of the cannula;
an elongated member situated longitudinally within the pathway of the cannula, the elongated member includes a conduit having a longitudinal axis and a distal end;
a balloon situated within the cannula and being coupled at one end to the distal end of the elongated member to permit a device to extend longitudinally though the conduit and a distal end of the balloon, and coupled at an opposing end to the second end of the cannula to permit eversion of the balloon when the elongated member is advanced, wherein the balloon has a pathway extending from the elongated member to a distal end of the balloon when the balloon is everted and inverted;
a sleeve situated within the balloon and being affixed at one end adjacent to the second end of the cannula to permit eversion and inversion of the sleeve, such that (i) when the balloon is completely everted from the cannula, the sleeve is everted, the sleeve is detached from the balloon along the length of the balloon, and is positioned over an expanded portion of the balloon, when the balloon is everted, such that the sleeve collects cells, and (ii) when the cannula is withdrawn from the vessel, the sleeve moves and is withdrawn with the cannula; and
a sheath co-axial with the cannula and disposed on an exterior of the cannula, the sheath being configured to be advanced distally over the sleeve to protect cell samples collected by sleeve, while the sleeve is in an inverted and everted configuration.
2 . The system of claim 1 , wherein the sleeve is configured to evert from the second end of the cannula upon pressurization of the balloon.
3 . The system of claim 1 , wherein the sleeve is sufficiently longer than the balloon such that the sleeve is partially everted from the cannula when the balloon is fully everted from the cannula.
4 . The system of claim 1 , wherein a surface on a second portion of the sleeve includes at least one of a textured surface, an adhesive surface, and an open mesh surface.
5 . The system of claim 1 , wherein the cannula is sufficiently flexible to be advanced through a vessel in a body.
6 . The system of claim 1 , wherein the balloon has a diameter sufficiently large to press the sleeve against inner walls of a body structure for cell collection.
7 . The system of claim 6 , wherein when everted, the balloon has a diameter less than a diameter of at least a portion of the sleeve.
8 . The system of claim 1 , further comprising a fluid tight seal configured to provide frictional force between the cannula and the elongated member.
9 . The system of claim 1 , further comprising an inflation port in fluid communication with the pathway of the cannula and the balloon.
10 . The system of claim 1 , wherein the elongated member is configured to move longitudinally within the pathway of the cannula.
11 . The system of claim 1 , wherein the balloon is in fluid communication with the pathway and configured to receive pressurizing fluid from the pathway for eversion out from the second end of the cannula.
12 . The system of claim 1 , wherein the balloon does not extend distally beyond the sleeve when everted.
13 . A method for cell collection within a vessel, the method comprising:
placing a cannula within the vessel within a body, the cannula comprising:
a pathway extending between a first end and a second end of the cannula;
an elongated member situated longitudinally within the pathway of the cannula, and having a conduit having a longitudinal axis and a distal end;
a balloon situated within the cannula and being coupled at one end to the distal end of the elongated member, to permit a device to extend longitudinally though the conduit and a distal end of the balloon, and coupled at an opposing end to the second end of the cannula, wherein the balloon has a pathway extending from the elongated member to a distal end of the balloon when the balloon is everted and inverted;
a sleeve situated within the balloon and being attached at one end adjacent to the second end of the cannula, such that upon eversion of the balloon from the cannula, the sleeve is everted from within the cannula to evert the sleeve out the second end of the cannula such that the sleeve is detached from the balloon along the length of the balloon and is positioned over an expanded portion of the balloon, when the balloon is everted; and
a sheath co-axial with the cannula and disposed on an exterior of the cannula, the sheath being configured to be advanced distally over the sleeve, while the sleeve is in the inverted and the everted configuration;
allowing a fully everted balloon to apply pressure to the sleeve against the vessel, such that the sleeve collects sample cells on a surface of the sleeve; and
withdrawing the cannula, including the sleeve, from within the vessel within the body, while at least a portion of the sheath protects cell samples collected on sleeve.
14 . The method of claim 13 , wherein the cannula further comprises a sheath, and wherein the method further comprises sliding the sheath in a distal direction and covering the sleeve after cells have been collected.
15 . The method of claim 13 , further comprising pressurizing the balloon by inputting fluid into the pathway.
16 . The method of claim 15 , further comprising everting the pressurized balloon by pushing the elongated member longitudinally toward the second end of the cannula.
17 . The method of claim 16 , wherein the sleeve is partially everted from the pathway of the cannula.
18 . The method of claim 17 , further comprising reinverting the sleeve within the pathway of the cannula.
19 . The method of claim 16 , wherein the sleeve is fully everted from the pathway of the cannula.
20 . The method of claim 13 , wherein the balloon has a diameter sufficiently large to press the sleeve against inner walls of a body structure for cell collection.
21 . The method of claim 20 , wherein when everted, the balloon has a diameter less than a diameter of at least a portion of the sleeve.