HEART ASSIST DEVICE WITH EXPANDABLE IMPELLER PUMP

An impeller includes a hub and a blade supported by the hub. The impeller has a stored configuration in which the blade is compressed so that its distal end moves towards the hub, and a deployed configuration in which the blade extends away from the hub. The impeller may be part of a pump for pumping fluids, such as blood, and may include a cannula having a proximal portion with a fixed diameter, and a distal portion with an expandable diameter. The impeller may reside in the expandable portion of the cannula. The cannula may have a compressed diameter which allows it to be inserted percutaneously into a patient. Once at a desired location, the expandable portion of the cannula may be expanded and the impeller expanded to the deployed configuration. A flexible drive shaft may extend through the cannula for rotationally driving the impeller within the patient. 1. (canceled)2. A catheter pump comprising:a cannula having an inlet and an outlet;an impeller disposed in the cannula, the impeller comprising a hub and a plurality of blades positioned along the hub that define a first diameter of the impeller in a stored configuration and further define a second diameter of the impeller in a deployed configuration, wherein the first diameter is at most half the second diameter; anda stator disposed downstream of the impeller in the cannula between the impeller and the outlet, the stator comprising a blade configured to reduce swirl velocity from discharge flow from the impeller. This application is a continuation of U.S. application Ser. No. 13/618,071, filed Sep. 14, 2012, which is a continuation of U.S. application Ser. No. 12/945,594, filed on Nov. 12, 2010 which is a continuation of U.S. application Ser. No. 11/728,051, filed on Mar. 23, 2007, now U.S. Pat. No. 7,841,976, which claims the benefit of the filing dates of U.S. Provisional Application No. 60/785,299, filed on Mar. 23, 2006 and 60/785,531, filed on Mar. 23, 2006, the disclosures of which are hereby ...

HEART ASSIST DEVICE WITH EXPANDABLE IMPELLER PUMP

An impeller includes a hub and a blade supported by the hub. The impeller has a stored configuration in which the blade is compressed so that its distal end moves towards the hub, and a deployed configuration in which the blade extends away from the hub. The impeller may be part of a pump for pumping fluids, such as blood, and may include a cannula having a proximal portion with a fixed diameter, and a distal portion with an expandable diameter. The impeller may reside in the expandable portion of the cannula. The cannula may have a compressed diameter which allows it to be inserted percutaneously into a patient. Once at a desired location, the expandable portion of the cannula may be expanded and the impeller expanded to the deployed configuration. A flexible drive shaft may extend through the cannula for rotationally driving the impeller within the patient. 1. (canceled)2. A catheter pump comprising:a cannula having an inlet and an outlet;an impeller disposed in the cannula, the impeller sized and shaped to be inserted into a heart of a patient; anda stator disposed downstream of the impeller in the cannula between the impeller and the outlet, the stator configured to reduce swirl velocity from discharge flow from the impeller.3. The catheter pump of claim 2 , wherein the stator comprises an expandable and collapsible structure.4. The catheter pump of claim 3 , wherein the cannula is expandable and collapsible.5. The catheter pump of claim 4 , wherein the impeller is expandable and collapsible.6. The catheter pump of claim 4 , further comprising a retainer sheath claim 4 , the retainer sheath configured to hold the stator and the cannula in a collapsed configuration when the stator and cannula are disposed in the retainer sheath and in an expanded configuration when urged out of the retainer sheath.7. The catheter pump of claim 4 , wherein the cannula comprises a mesh.8. The catheter pump of claim 7 , further comprising an elastic coating disposed about the mesh.9 ...

HIGH SPEED GEAR SIZED AND CONFIGURED TO REDUCE WINDAGE LOSS

A gear and drive system utilizing the gear include teeth. Each of the teeth has a first side and a second side opposite the first side that extends from a body of the gear. For each tooth of the gear, a first extended portion is attached to the first side of the tooth to divert flow of fluid adjacent to the body of the gear to reduce windage losses that occur when the gear rotates. The gear may be utilized in drive systems that may have high rotational speeds, such as speeds where the tip velocities are greater than or equal to about 68 m/s. Some embodiments of the gear may also utilize teeth that also have second extended portions attached to the second sides of the teeth to divert flow of fluid adjacent to the body of the gear to reduce windage losses that occur when the gear rotates. 1. A gear comprising:a body, the body having a first side, a second side opposite the first side and a surface extending between the first and second sides; anda plurality of teeth extending from the surface, each tooth of the plurality of teeth having a base portion adjacent to the surface of the body and a distal portion that defines a tip of the tooth, each tooth has a first side adjacent to the first side of the body and a second side adjacent to the second side of the body;a plurality of first extended portions,the first side of each tooth of the plurality of teeth being attached to a respective one of the first extended portions such that that extended portion extends beyond the first side of the body to divert a flow of fluid adjacent to the first side of the body to reduce windage losses that occur when the gear rotates.2. The gear of wherein the teeth are integral with the body and wherein the body and teeth are comprised of metal claim 1 , steel claim 1 , aluminum claim 1 , cast aluminum claim 1 , a ceramic material claim 1 , a composite material claim 1 , a polymeric material or plastic.3. The gear of further comprising a plurality of second extended portions and wherein ...

HEART ASSIST DEVICE WITH EXPANDABLE IMPELLER PUMP

An impeller includes a hub and a blade supported by the hub. The impeller has a stored configuration in which the blade is compressed so that its distal end moves towards the hub, and a deployed configuration in which the blade extends away from the hub. The impeller may be part of a pump for pumping fluids, such as blood, and may include a cannula having a proximal portion with a fixed diameter, and a distal portion with an expandable diameter. The impeller may reside in the expandable portion of the cannula. The cannula may have a compressed diameter which allows it to be inserted percutaneously into a patient. Once at a desired location, the expandable portion of the cannula may be expanded and the impeller expanded to the deployed configuration. A flexible drive shaft may extend through the cannula for rotationally driving the impeller within the patient. 1an elongated cannula having a proximal portion and a distal portion, the distal portion including an expandable cannula having a mesh; andan impeller positioned in the elongated cannula.. An apparatus for inducing motion of a fluid relative to the apparatus, the apparatus comprising: This application is a continuation of U.S. application Ser. No. 12/945,594, filed on Nov. 12, 2010 which is a continuation of U.S. application Ser. No. 11/728,051, filed on Mar. 23, 2007, now U.S. Pat. No. 7,841,976, which claims the benefit of the filing dates of U.S. Provisional Application Nos. 60/785,299, filed on Mar. 23, 2006 and 60/785,531, filed on Mar. 23, 2006, the disclosures of which are hereby incorporated by reference herein in their entirety for all purposes. Further, the entire disclosures of U.S. Provisional Application No. 60/610,938, filed on Sep. 17, 2004, and U.S. patent application Ser. No. 11/227,277, filed on Sep. 15, 2005, are hereby incorporated by reference herein in their entirety for all purposes.The present invention relates to fluid pumping impellers, more particularly to expandable fluid pumping ...

Expandable impeller pump

An impeller includes a hub, and a plurality of blades supported by the hub, the blades being arranged in at least two blade rows. The impeller has a deployed configuration in which the blades extend away from the hub, and a stored configuration in which at least one of the blades is radially compressed, for example by folding the blade towards the hub. The impeller may also have an operational configuration in which at least some of the blades are deformed from the deployed configuration upon rotation of the impeller when in the deployed configuration. The outer edge of one or more blades may have a winglet, and the base of the blades may have an associated indentation to facilitate folding of the blades.

BLOOD PUMP WITH EXPANDABLE CANNULA

A blood pump includes an impeller having a plurality of foldable blades and a cannula having a proximal portion with a fixed diameter, and a distal portion with an expandable diameter. The impeller can reside in the expandable portion of the cannula. The cannula has a collapsed condition for percutaneous delivery to a desired location within the body, and an expanded condition in which the impeller can rotate to pump blood. A flexible drive shaft can extend through the cannula for rotationally driving the impeller within the patient's body. 1. A pump , comprising:an elongated cannula having a proximal portion and a distal portion;an impeller positioned in the elongated cannula and configured to rotate about an axis; andan expandable vane assembly positioned in the elongated cannula about the axis adjacent the impeller and having a deployed configuration and a stored configuration, the vane assembly comprising a vane, the vane in the deployed configuration extending away from the axis, the vane in the stored configuration compressed inwardly towards the axis relative to the deployed configuration.2. The pump of claim 1 , wherein the vane is configured to expand to the deployed configuration by release of strain stored in the vane.3. The pump of claim 1 , wherein the distal portion of the elongated cannula includes an expandable portion having an expanded configuration and a collapsed configuration claim 1 , the vane assembly disposed in the expandable portion.4. The pump of claim 3 , wherein the vane assembly is configured to move from the stored configuration to the deployed configuration when the expandable portion moves from the collapsed configuration to the expanded configuration.5. The pump of claim 3 , wherein a free end of the vane contacts an inner wall of the expandable portion when the vane assembly is in the deployed configuration.6. The pump of claim 5 , wherein the vane assembly is positioned distally of the impeller.7. The pump of claim 6 , wherein the ...

HEART ASSIST DEVICE WITH EXPANDABLE IMPELLER PUMP

An impeller includes a hub and a blade supported by the hub. The impeller has a stored configuration in which the blade is compressed so that its distal end moves towards the hub, and a deployed configuration in which the blade extends away from the hub. The impeller may be part of a pump for pumping fluids, such as blood, and may include a cannula having a proximal portion with a fixed diameter, and a distal portion with an expandable diameter. The impeller may reside in the expandable portion of the cannula. The cannula may have a compressed diameter which allows it to be inserted percutaneously into a patient. Once at a desired location, the expandable portion of the cannula may be expanded and the impeller expanded to the deployed configuration. A flexible drive shaft may extend through the cannula for rotationally driving the impeller within the patient. 1. (canceled)2. A catheter pump comprising: a non-expandable portion;', 'an expandable portion extending between a proximal end and a distal end;', 'a nose grommet;', 'a plurality of inlet struts extending between the nose grommet and the expandable portion distal end; and', 'a plurality of discharge struts extending between the non-expandable portion and the expandable portion proximal end; and, 'a cannula comprisingan impeller disposed in the cannula, the impeller sized and shaped to be inserted into a heart of a patient.3. The catheter pump of claim 2 , wherein the plurality of inlet struts are configured to prevent obstructions from entering the cannula.4. The catheter pump of claim 2 , wherein the plurality of discharge struts are configured to act as stationary stator blades and remove swirl velocity from a discharge flow of the impeller.5. The catheter pump of claim 2 , wherein the plurality of discharge struts are flat linear elements.6. The catheter pump of claim 2 , wherein the plurality of discharge struts have an airfoil cross-section.7. The catheter pump of claim 2 , wherein the expandable portion ...

EXPANDABLE IMPELLER PUMP

An impeller includes a hub, and a plurality of blades supported by the hub, the blades being arranged in at least .two blade rows. The impeller has a deployed configuration in which the blades extend away from the hub, and a stored configuration in which at least one of the blades is radially compressed, for example by folding the blade towards the hub. The impeller may also have an operational configuration in which at least some of the blades are deformed from the deployed configuration upon rotation of the impeller when in the deployed configuration. The outer edge of one or more blades may have a winglet, and the base of the blades may have an associated indentation to facilitate folding of the blades. 1. An impeller pump comprising:a hub;a blade supported by the hub, the blade having a proximal end attached to the hub and a distal end;the blade having a deployed configuration, a stored configuration and an operational configuration, the blade in the deployed configuration extending away from the hub, the blade in the stored configuration being compressed so as to move the distal end of the blade towards the hub, and the blade in the operational configuration being deformed from the deployed configuration upon rotation of the impeller when in the deployed configuration; anda winglet provided on the distal end of the blade, wherein the winglet comprises a length that varies along a length of the blade.2. The impeller pump of claim 1 , wherein the winglet comprises a first end claim 1 , a second end claim 1 , and an intermediate portion positioned therebetween claim 1 , wherein a length of the intermediate portion is larger than a length of either the first end or the second end.3. The impeller pump of claim 1 , wherein the blade has a pressure face and a suction face claim 1 , the winglet extending from the pressure face of the blade.4. The impeller pump of claim 1 , wherein the blade has a pressure face and a suction face claim 1 , the winglet extending from the ...

EXPANDABLE IMPELLER PUMP

An impeller includes a hub, and a plurality of blades supported by the hub, the blades being arranged in at least .two blade rows. The impeller has a deployed configuration in which the blades extend away from the hub, and a stored configuration in which at least one of the blades is radially compressed, for example by folding the blade towards the hub. The impeller may also have an operational configuration in which at least some of the blades are deformed from the deployed configuration upon rotation of the impeller when in the deployed configuration. The outer edge of one or more blades may have a winglet, and the base of the blades may have an associated indentation to facilitate folding of the blades. 1. A catheter heart pump comprising:an elongate catheter body having a proximal end, and a distal end configured to be advanced to a heart of a patient;an expandable sleeve coupled to the distal end, the expandable sleeve having a stored configuration in which the expandable sleeve is advanced to the heart, and an expanded configuration, and further comprising a distal inlet port and a proximal outlet port;an expandable impeller configured to be disposed within the expandable sleeve between the distal inlet port and the proximal outlet port when in the expanded configuration, and configured to turn on a shaft to generate a fluid flow from the distal inlet port to the proximal outlet port; anda storage sleeve configured to house both the expandable sleeve and the expandable impeller therein.2. The catheter heart pump of claim 1 , wherein the impeller and the expandable sleeve are configured to expand when urged out of the storage sleeve.3. The catheter heart pump of claim 1 , wherein the storage sleeve is configured to compress the expandable sleeve into the stored configuration for insertion into the patient and advancement to the heart.4. The catheter heart pump of claim 2 , wherein the expandable sleeve is configured for insertion into the storage sleeve.5. The ...

EXPANDABLE IMPELLER PUMP

An impeller includes a hub, and a plurality of blades supported by the hub, the blades being arranged in at least two blade rows. The impeller has a deployed configuration in which the blades extend away from the hub, and a stored configuration in which at least one of the blades is radially compressed, for example by folding the blade towards the hub. The impeller may also have an operational configuration in which at least some of the blades are deformed from the deployed configuration upon rotation of the impeller when in the deployed configuration. The outer edge of one or more blades may have a winglet, and the base of the blades may have an associated indentation to facilitate folding of the blades. 1. An apparatus for inducing motion of a fluid relative to the apparatus , the apparatus comprising: a hub extending in a length direction; and', 'a plurality of blades supported by the hub, each blade having a proximal end attached to the hub and a distal end;', 'the blades being arranged in at least two blade rows arranged in series in the length direction of the hub;, 'an impeller, includingthe impeller having a deployed configuration and a stored configuration, each blade in the deployed configuration of the impeller extending away from the hub, and at least one of the blades in the stored configuration of the impeller being compressed so as to move the distal end of the at least one blade towards the hub.2. The apparatus as claimed in claim 1 , wherein each blade row includes at least two blades.3. The apparatus as claimed in claim 1 , wherein the distal end of at least one of the plurality of blades includes a winglet.4. The apparatus as claimed in claim 1 , wherein the distal end of each blade in at least one blade row includes a winglet.5. The apparatus as claimed in claim 1 , wherein the distal end of each of the plurality of blades includes a winglet.6. The apparatus as claimed in claim 1 , wherein the plurality of blades are formed integrally with the ...

EXPANDABLE IMPELLER PUMP

An impeller includes a hub, and a plurality of blades supported by the hub, the blades being arranged in at least two blade rows. The impeller has a deployed configuration in which the blades extend away from the hub, and a stored configuration in which at least one of the blades is radially compressed, for example by folding the blade towards the hub. The impeller may also have an operational configuration in which at least some of the blades are deformed from the deployed configuration upon rotation of the impeller when in the deployed configuration. The outer edge of one or more blades may have a winglet, and the base of the blades may have an associated indentation to facilitate folding of the blades. 117-. (canceled)18. A catheter heart pump comprising:an elongate catheter body having a proximal end, and a distal end configured to be advanced to a heart of a patient;an expandable sleeve coupled to the distal end, the expandable sleeve having a stored configuration in which the expandable sleeve is advanced to the heart, and an expanded configuration, and further comprising a distal inlet port and a proximal outlet port; andan expandable impeller configured to be disposed within the expandable sleeve between the distal inlet port and the proximal outlet port when in the expanded configuration, and configured to turn on a shaft to generate a fluid flow from the distal inlet port to the proximal outlet port.19. The catheter heart pump of claim 18 , wherein the stored configuration of the expandable sleeve has a diameter of no more than 4 millimeters claim 18 , and the expanded configuration has a diameter of at least 6 millimeters.20. The catheter heart pump of claim 18 , wherein the expandable impeller comprises a hub and a plurality of continuous helical blades extending therefrom.21. The catheter heart pump of further comprising a storage sleeve into which the expandable sleeve is configured to be inserted claim 18 , the storage sleeve configured to compress ...

EXPANDABLE IMPELLER PUMP

An impeller includes a hub, and a plurality of blades supported by the hub, the blades being arranged in at least two blade rows. The impeller has a deployed configuration in which the blades extend away from the hub, and a stored configuration in which at least one of the blades is radially compressed, for example by folding the blade towards the hub. The impeller may also have an operational configuration in which at least some of the blades are deformed from the deployed configuration upon rotation of the impeller when in the deployed configuration. The outer edge of one or more blades may have a winglet, and the base of the blades may have an associated indentation to facilitate folding of the blades. 1. A catheter heart pump comprising:an elongate catheter body having a proximal end, and a distal end configured to be advanced to a heart of a patient;an expandable sleeve coupled to the distal end, the expandable sleeve having a stored configuration in which the expandable sleeve is advanced to the heart, and an expanded configuration, and further comprising a distal inlet port and a proximal outlet port;an expandable impeller configured to be disposed within the expandable sleeve between the distal inlet port and the proximal outlet port when in the expanded configuration, and configured to turn on a shaft to generate a fluid flow from the distal inlet port to the proximal outlet port; anda storage sleeve configured to house both the expandable sleeve and the expandable impeller therein.2. The catheter heart pump of claim 1 , wherein the impeller and the expandable sleeve are configured to expand when urged out of the storage sleeve.3. The catheter heart pump of claim 1 , wherein the storage sleeve is configured to compress the expandable sleeve into the stored configuration for insertion into the patient and advancement to the heart.4. The catheter heart pump of claim 2 , wherein the expandable sleeve is configured for insertion into the storage sleeve.5. The ...

Expandable impeller pump

An impeller according to an example of the present invention comprises a hub, and at least one blade supported by the hub. The impeller has a deployed configuration in which the blade extends away from the hub, and a stored configuration in which the impeller is radially compressed, for example by folding the blade towards the hub. The impeller may comprise a plurality of blades, arranged in blade rows, to facilitate radial compression of the blades. The outer edge of a blade may have a winglet, and the base of the blade may have an associated indentation to facilitate folding of the blade.

Heart assist device with expandable impeller pump

A catheter pump comprising:a cannula comprising:a non-expandable portion (660);an expandable portion (626) extending between a proximal (648) end and a distal end (646), wherein the expandable portion comprises a mesh (631);a plurality of inlet struts (652) extending from the expandable portion distal end; anda plurality of discharge struts (654) extending between the non-expandable portion and the expandable portion proximal end, wherein the plurality of inlet struts and the plurality of discharge struts comprise nitinol; andan impeller (605) disposed in the cannula, the impeller sized and shaped to be inserted into a heart of a patient.

Blood pump with expandable cannula

Heart assist device with expandable impeller pump

An impeller includes a hub and at least one blade supported by the hub. The impeller has a stored configuration in which the blade is compressed so that its distal end moves towards the hub, and a deployed configuration in which the blade extends away from the hub. The impeller may be part of a pump for pumping fluids, such as pumping blood within a patient. A blood pump may include a cannula having a proximal portion with a fixed diameter, and a distal portion with an expandable diameter. The impeller may reside in the expandable portion of the cannula. The cannula may have a compressed diameter which allows it to be inserted percutaneously into a patient. Once at a desired location, the expandable portion of the cannula may be expanded and the impeller expanded to the deployed configuration. A flexible drive shaft may extend through the cannula for rotationally driving the impeller within the patient's body.

Blood pump with expandable cannula

A blood pump includes an impeller having a plurality of foldable blades and a cannula having a proximal portion with a fixed diameter, and a distal portion with an expandable diameter. The impeller can reside in the expandable portion of the cannula. The cannula has a collapsed condition for percutaneous delivery to a desired location within the body, and an expanded condition in which the impeller can rotate to pump blood. A flexible drive shaft can extend through the cannula for rotationally driving the impeller within the patient's body.

Expandable impeller pump

An impeller includes a hub, and a plurality of blades supported by the hub, the blades being arranged in at least two blade rows. The impeller has a deployed configuration in which the blades extend away from the hub, and a stored configuration in which at least one of the blades is radially compressed, for example by folding the blade towards the hub. The impeller may also have an operational configuration in which at least some of the blades are deformed from the deployed configuration upon rotation of the impeller when in the deployed configuration. The outer edge of one or more blades may have a winglet, and the base of the blades may have an associated indentation to facilitate folding of the blades.

Expandable impeller pump

An impeller includes a hub, and a plurality of blades supported by the hub, the blades being arranged in at least two blade rows. The impeller has a deployed configuration in which the blades extend away from the hub, and a stored configuration in which at least one of the blades is radially compressed, for example by folding the blade towards the hub. The impeller may also have an operational configuration in which at least some of the blades are deformed from the deployed configuration upon rotation of the impeller when in the deployed configuration. The outer edge of one or more blades may have a winglet, and the base of the blades may have an associated indentation to facilitate folding of the blades.

Expandable impeller pump

An impeller includes a hub, and a plurality of blades supported by the hub, the blades being arranged in at least two blade rows. The impeller has a deployed configuration in which the blades extend away from the hub, and a stored configuration in which at least one of the blades is radially compressed, for example by folding the blade towards the hub. The impeller may also have an operational configuration in which at least some of the blades are deformed from the deployed configuration upon rotation of the impeller when in the deployed configuration. The outer edge of one or more blades may have a winglet, and the base of the blades may have an associated indentation to facilitate folding of the blades.

Expandable impeller pump

An impeller includes a hub, and a plurality of blades supported by the hub, the blades being arranged in at least two blade rows. The impeller has a deployed configuration in which the blades extend away from the hub, and a stored configuration in which at least one of the blades is radially compressed, for example by folding the blade towards the hub. The impeller may also have an operational configuration in which at least some of the blades are deformed from the deployed configuration upon rotation of the impeller when in the deployed configuration. The outer edge of one or more blades may have a winglet, and the base of the blades may have an associated indentation to facilitate folding of the blades.

Heart assist device with expandable impeller pump

An impeller includes a hub and a blade supported by the hub. The impeller has a stored configuration in which the blade is compressed so that its distal end moves towards the hub, and a deployed configuration in which the blade extends away from the hub. The impeller may be part of a pump for pumping fluids, such as blood, and may include a cannula having a proximal portion with a fixed diameter, and a distal portion with an expandable diameter. The impeller may reside in the expandable portion of the cannula. The cannula may have a compressed diameter which allows it to be inserted percutaneously into a patient. Once at a desired location, the expandable portion of the cannula may be expanded and the impeller expanded to the deployed configuration. A flexible drive shaft may extend through the cannula for rotationally driving the impeller within the patient.

Heart assist device with expandable impeller pump

An impeller includes a hub and at least one blade supported by the hub. The impeller has a stored configuration in which the blade is compressed so that its distal end moves towards the hub, and a deployed configuration in which the blade extends away from the hub. The impeller may be part of a pump for pumping fluids, such as pumping blood within a patient. A blood pump may include a cannula having a proximal portion with a fixed diameter, and a distal portion with an expandable diameter. The impeller may reside in the expandable portion of the cannula. The cannula may have a compressed diameter which allows it to be inserted percutaneously into a patient. Once at a desired location, the expandable portion of the cannula may be expanded and the impeller expanded to the deployed configuration. A flexible drive shaft may extend through the cannula for rotationally driving the impeller within the patient's body.

Heart assist device with expandable impeller pump

An impeller includes a hub and a blade supported by the hub. The impeller has a stored configuration in which the blade is compressed so that its distal end moves towards the hub, and a deployed configuration in which the blade extends away from the hub. The impeller may be part of a pump for pumping fluids, such as blood, and may include a cannula having a proximal portion with a fixed diameter, and a distal portion with an expandable diameter. The impeller may reside in the expandable portion of the cannula. The cannula may have a compressed diameter which allows it to be inserted percutaneously into a patient. Once at a desired location, the expandable portion of the cannula may be expanded and the impeller expanded to the deployed configuration. A flexible drive shaft may extend through the cannula for rotationally driving the impeller within the patient.

Heart assist device with expandable impeller pump

An impeller includes a hub and a blade supported by the hub. The impeller has a stored configuration in which the blade is compressed so that its distal end moves towards the hub, and a deployed configuration in which the blade extends away from the hub. The impeller may be part of a pump for pumping fluids, such as blood, and may include a cannula having a proximal portion with a fixed diameter, and a distal portion with an expandable diameter. The impeller may reside in the expandable portion of the cannula. The cannula may have a compressed diameter which allows it to be inserted percutaneously into a patient. Once at a desired location, the expandable portion of the cannula may be expanded and the impeller expanded to the deployed configuration. A flexible drive shaft may extend through the cannula for rotationally driving the impeller within the patient.

Heart assist device with expandable impeller pump

An impeller includes a hub and a blade supported by the hub. The impeller has a stored configuration in which the blade is compressed so that its distal end moves towards the hub, and a deployed configuration in which the blade extends away from the hub. The impeller may be part of a pump for pumping fluids, such as blood, and may include a cannula having a proximal portion with a fixed diameter, and a distal portion with an expandable diameter. The impeller may reside in the expandable portion of the cannula. The cannula may have a compressed diameter which allows it to be inserted percutaneously into a patient. Once at a desired location, the expandable portion of the cannula may be expanded and the impeller expanded to the deployed configuration. A flexible drive shaft may extend through the cannula for rotationally driving the impeller within the patient.

Heart assist device with expandable impeller pump

An impeller includes a hub and at least one blade supported by the hub. The impeller has a stored configuration in which the blade is compressed so that its distal end moves towards the hub, and a deployed configuration in which the blade extends away from the hub. The impeller may be part of a pump for pumping fluids, such as blood within patients. A blood pump may include a cannula having a proximal portion with a fixed diameter, and a distal portion with an expandable diameter. The impeller may reside in the expandable portion of the cannula. The cannula may have a compressed diameter allowing percutaneous insertion into patients. Once at a desired location, the expandable portion of the cannula may be expanded and the impeller expanded to the deployed configuration. A flexible drive shaft may extend through the cannula for rotationally driving the impeller within the patient.

Heart assist device with expandable impeller pump

A catheter blood pump includes a cannula with an expandable central portion having a proximal end, a distal end and a blood flow conduit therebetween. A flexible inlet portion at the distal end is provided with a plurality of spaced apart inlet struts configured to prevent an obstruction from entering, and a flexible outlet portion is provided with a plurality of spaced apart outlet struts operative to reduce a swirl velocity of blood, wherein the plurality of spaced apart inlet struts and the plurality of spaced apart outlet struts are fabricated from a collapsible shape memory material.

Expandable impeller pump

A catheter heart pump comprising: an elongate catheter body having a proximal end, and a distal end configured to be advanced to a heart of a patient; an expandable sleeve coupled to the distal end, the expandable sleeve having a stored configuration in which the expandable sleeve is advanced to the heart, and an expanded configuration, and further comprising a distal inlet port and a proximal outlet port; an expandable impeller (20, 22) configured to be disposed within the expandable sleeve between the distal inlet port and the proximal outlet port when in the expanded configuration, and configured to be turned on by a shaft to generate a fluid flow from the distal inlet port to the proximal outlet port; and a storage sleeve (24) configured to house both the expandable sleeve and the expandable impeller therein.

Heart assist device with expandable impeller pump

An impeller includes a hub and at least one blade supported by the hub. The impeller has a stored configuration in which the blade is compressed so that its distal end moves towards the hub, and a deployed configuration in which the blade extends away from the hub. The impeller may be part of a pump for pumping fluids, such as blood within patients. A blood pump may include a cannula having a proximal portion with a fixed diameter, and a distal portion with an expandable diameter. The impeller may reside in the expandable portion of the cannula. The cannula may have a compressed diameter allowing percutaneous insertion into patients. Once at a desired location, the expandable portion of the cannula may be expanded and the impeller expanded to the deployed configuration. A flexible drive shaft may extend through the cannula for rotationally driving the impeller within the patient.

Heart assist device with expandable impeller pump

A blood pump comprising a cannula (625) having an expandable portion comprising a mesh (631), the mesh comprising circumferential rings, wherein adjacent circumferential rings are at least partially interleaved and an impeller (605) positioned in the cannula.

Expandable impeller pump

An impeller includes a hub (10), and a plurality of blades (12) supported by the hub, the blades being arranged in at least .two blade rows. The impeller has a deployed configuration in which the blades extend away from the hub, and a stored configuration in which at least one of the blades is radially compressed, for example by folding the blade towards the hub. The impeller may also have an operational configuration in which at least some of the blades are deformed from the deployed configuration upon rotation of the impeller when in the deployed configuration. The outer edge of one or more blades may have a winglet (122), and the base of the blades may have an associated indentation to facilitate folding of the blades.

Blood pump with expandable cannula

A blood pump includes an impeller having a plurality of foldable blades and a cannula having a proximal portion with a fixed diameter, and a distal portion with an expandable diameter. The impeller can reside in the expandable portion of the cannula. The cannula has a collapsed condition for percutaneous delivery to a desired location within the body, and an expanded condition in which the impeller can rotate to pump blood. A flexible drive shaft can extend through the cannula for rotationally driving the impeller within the patient's body.

Heart assist device with expandable impeller pump

An impeller includes a hub and at least one blade supported by the hub. The impeller has a stored configuration in which the blade is compressed so that its distal end moves towards the hub, and a deployed configuration in which the blade extends away from the hub. The impeller may be part of a pump for pumping fluids, such as blood within patients. A blood pump may include a cannula having a proximal portion with a fixed diameter, and a distal portion with an expandable diameter. The impeller may reside in the expandable portion of the cannula. The cannula may have a compressed diameter allowing percutaneous insertion into patients. Once at a desired location, the expandable portion of the cannula may be expanded and the impeller expanded to the deployed configuration. A flexible drive shaft may extend through the cannula for rotationally driving the impeller within the patient.

Expandable impeller pump

Heart assist device with expandable impeller pump