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US 12,599,755 B2Granted
Vascular catheter and method
AssigneeI-Vasc S.R.L.
InventorMario Salerno
Life of this patent
Estimating the term…
Abstract
A vascular catheter includes a catheter shaft having a distal end, a proximal end, a handle, at least two occlusion elements adapted to isolate a volume of the blood vessel, and an expandable balloon, between the two occlusion elements. The catheter shaft includes a first hole that opens into the expandable balloon. The catheter handle includes a first pumping device associated with a first path and with a first tank containing a first fluid, a second pumping device associated with a second path and with a second tank containing a second fluid, and a synchronization device connectable both to the first and to the second pumping devices.
Claims17
A vascular catheter (1) comprising:
- —a catheter shaft (20) having a distal end, a proximal end (14), and a longitudinal axis (X2) therebetween, the catheter shaft (20) adapted to reach at least a predefined position in a blood vessel (2) in a patient;
- —a catheter handle (10) at the proximal end of the catheter shaft (20);
- —at least two occlusion elements (42, 43) fitted onto the catheter shaft (20) adapted to act as an occluder to isolate an isolated volume (40) of the blood vessel (2), the isolated volume (40) longitudinally interposed between said at least two occlusion elements (42, 43);
- —an expandable balloon (41), longitudinally interposed between the two occlusion elements (42, 43) and adapted to act as a core to occupy a first portion of the isolated volume (40) of the blood vessel (2) and thereby define a second portion (44) of the isolated volume (40) radially externally contouring a wall (45) of the expandable balloon (41);
- and at least two delivery and return catheter paths (11, 12, 13), independent from each other, which define in the vascular catheter (1) at least a first path (P1) and at least a second path (P2), distinct from the first path (P1);
- wherein the catheter shaft (20) comprises a first hole (24) which opens into the at least one expandable balloon (41);
- wherein the first hole (24) is in fluid communication with said first path (P1);
- wherein the catheter handle (10) comprises a first pumping device (31) associated with the first path and associable with a first tank (32) containing a first fluid (30);
- wherein the catheter shaft (20) comprises a second hole (26) which opens out of the at least one expandable balloon (41) so as to be adapted to lead into said second portion (44) of said isolated volume (40);
- wherein the second hole (26) is in fluid communication with said second path (P2);
- wherein the catheter handle (10) comprises a second pumping device (51) associated with the second path and associable with a second tank (52) containing a second, pharmacological fluid (50) which contains drug;
- wherein the catheter handle (20) comprises a synchronization device (60) operatively connectable both to the first pumping device (31) and to the second pumping device (51) and at least one drive interface for controlling said synchronization device (60);
- wherein both said first tank (32) and said second tank (52) act as a collection tank and a storage tank for the respective fluid, said first and second paths (P1, P2) allowing the respective fluid to travel in both directions, so that the catheter shaft (10) can be repositioned in various portions of the blood vessel (2) having different caliber to create said isolated volume (40);
- wherein said first pumping device (31) comprises at least a first plunger (33), adapted to slide within the first tank (32), the first tank comprising at least one cylinder in fluid connection with at least one handle path (11, 12, 13), so as to form a first syringe;
- wherein said second pumping device (51) comprises at least a second plunger (53), adapted to slide within the second tank (52), the second tank comprising at least one cylinder in fluid connection with at least one handle path (11, 12, 13), so as to form a second syringe;
- wherein said synchronization device (60) is configured to:
- decouple, at least for a predefined free stroke, in response to a first manual operation of the at least one drive interface, the stroke of said first plunger (33) within said first tank (32) from the stroke of said second plunger (53) within said second tank (52) while said second pumping device (51) supplies the second, pharmacological fluid (50) to the second portion (44) of the isolated volume (40) as a result of movement of said second plunger (53) in a first direction, and without reduction in volume of the expandable balloon (41) to create an overpressure in the second portion (44) of the isolated volume (40), and couple, in response to a second manual operation of the at least one drive interface, the stroke of said first plunger (33) within said first tank (32) to the stroke of said second plunger (53) within said second tank (52) to deliver in said isolated volume (40) a predetermined volume of the second, pharmacological fluid (50) out of the at least one expandable balloon (41) as a result of movement of said second plunger (53) in the first direction, simultaneously causing a reduction in volume of the expandable balloon (41) by an equal predetermined volume as a result of coupled movement of said first plunger (31) in a second direction opposite to the first direction.
14 more elements
A method of handling a catheter comprising the following steps of:
- —providing a vascular catheter (1) according to—providing a vascular catheter (1) according to—disposing at least a portion of said vascular catheter (1) inside a lumen of a blood vessel (2) that includes a blood vessel segment (5) to be treated, wherein the method comprises the following treatment steps:
- a—dispensing said first fluid (30) inside said expandable balloon (41) by means of said first pumping device (31), inflating said expandable balloon (41) to be expanded at least radially, b—bringing said expandable balloon (41) into contact with a vessel wall (4) of the blood vessel (2), c—expanding said at least two occlusion elements (42, 43) at least radially, to form an occlusion which, adhering to vessel walls (4) along at least a cross section of said blood vessel (2), isolates an isolated volume (40) of the blood vessel (2) to be treated from the circulatory system, the isolated volume (40) longitudinally interposed between said at least two occlusion elements, d—supplying said second, pharmacological fluid (50) by means of said second pumping device (51) in a second portion (44) of the isolated volume (40) to create an overpressure in the second portion (44), the second portion (44) of the isolated volume (40) being located between the wall (45) of said expandable balloon (41) and the vessel wall (4) of the blood vessel segment (5) to be treated, and, subsequently, further supplying said second, pharmacological fluid (50) into the over-pressurized second portion (44), e—deflating at least partially said expandable balloon (41) by withdrawing said first fluid (30) from the expandable balloon (41), and f—synchronizing the volume of said second, pharmacological fluid (50) supplied in the second portion (44) of the isolated volume (40) with the volume of the first fluid (30) withdrawn from the expandable balloon (41), wherein the step d—is carried out at the same time as the step e—, to keep the isolated volume (40) of said blood vessel segment (5) to be treated constant, and wherein the step f—is performed after activating, or operating, said synchronization device (60) operatively connected to both said first pumping device (31) and said second pumping device (51).
Dependencies are inferred from the claim text.