Internal balloon sheath
Devices and methods for providing an internal balloon sheath. One device includes a sheath for insertion through an arteriotomy of a patient. The sheath comprises a tubular sheath body having a longitudinal axis, an open proximal end, an open distal end, an outer surface and an inner surface, the inner surface defining a lumen between the proximal and distal ends for passage of a catheter device. The sheath also comprises an inflatable balloon disposed within the lumen. The inflatable balloon is configured to occupy a longitudinal space in the lumen between the inner surface of the sheath body and the catheter device when the catheter device is disposed within the sheath and the balloon is inflated, and fluidically seal the lumen.
1 . An introducer sheath assembly comprising:
a tubular sheath body having a proximal end, a distal end, and a lumen extending between the proximal and distal ends for passage of a catheter device; and
a balloon sleeve having an inflatable balloon, the balloon sleeve being axially aligned and in-line with the catheter device, the balloon sleeve being co-axially arranged around the catheter device, and the balloon sleeve being configured to traverse the lumen of the tubular sheath body such that the inflatable balloon forms a fluidic seal between the tubular sheath body and the catheter device when the inflatable balloon is inflated,
wherein the inflatable balloon is disposed on a length of an external surface of the balloon sleeve.
2 . The introducer sheath assembly of claim 1 , wherein the fluidic seal is configured to form a region in which fluid is prevented from flowing between the tubular sheath body and the catheter device.
3 . The introducer sheath assembly of claim 1 , wherein the inflatable balloon is configured to form an interference fit between the catheter device and the tubular sheath body when inflated, thereby preventing any axial movement of the catheter device relative to the tubular sheath body.
4 . The introducer sheath assembly of claim 1 , wherein a length of the inflatable balloon is configured such that a proximal end of the inflatable balloon will be aligned with the proximal end of the tubular sheath body when the balloon sleeve is inserted into the lumen of the tubular sheath body and a distal end of the inflatable balloon is aligned with the distal end of the tubular sheath body.
5 . The introducer sheath assembly of claim 1 , wherein a proximal end of the balloon sleeve is configured to remain proximal of the proximal end of the tubular sheath body when the balloon sleeve is inserted into the lumen of the tubular sheath body and a distal end of the inflatable balloon is aligned with the distal end of the tubular sheath body.
6 . The introducer sheath assembly of claim 1 , wherein the balloon sleeve comprises an inflation lumen that extends linearly or curvilinearly from a proximal end of the balloon sleeve to an inflation opening located within the inflatable balloon, wherein the inflation lumen is in fluid communication with the inflation opening.
7 . The introducer sheath assembly of claim 1 , wherein the inflatable balloon is radially symmetric with respect to a longitudinal axis of the balloon sleeve when inflated.
8 . The introducer sheath assembly of claim 1 , wherein the inflatable balloon is ring-shaped when inflated.
9 . The introducer sheath assembly of claim 1 , wherein the inflatable balloon is configured to apply a radial force on the catheter device when inflated, thereby locking the catheter device in a position relative to the tubular sheath body.
10 . The introducer sheath assembly of claim 1 , wherein the inflatable balloon is asymmetric with respect to a longitudinal axis of the balloon sleeve when inflated.
11 . The introducer sheath assembly of claim 10 , wherein the inflatable balloon is configured to exert a force on the catheter device so as to push the catheter device towards a portion of the tubular sheath body when inflated, thereby locking the catheter device in a position relative to the tubular sheath body.
12 . The introducer sheath assembly of claim 1 , wherein the distal end of the tubular sheath body comprises an elastic material that is softer than a material of a rest of the tubular sheath body.
13 . The introducer sheath assembly of claim 1 , wherein the balloon sleeve comprises a hub at a proximal end of the balloon sleeve.
14 . The introducer sheath assembly of claim 13 , wherein the hub comprises a hemostasis valve.
15 . The introducer sheath assembly of claim 14 , wherein the hemostasis valve is configured to seal a lumen of the balloon sleeve against an ingress of external fluids.
16 . The introducer sheath assembly of claim 13 , wherein the hub comprises an irrigation port that is configured to be in fluid communication with a space between the catheter device and an inner surface of the balloon sleeve, thereby enabling the space to be flushed with fluid prior to inflation of the inflatable balloon.
17 . The introducer sheath assembly of claim 16 , wherein the irrigation port is coupled to a connector to prevent backflow of fluid.