Bidirectional femoral arterial cannula

Claim 2

A bidirectional cannula comprising a first tube including: (i) a proximal end; (ii) a distal tip with an opening; (iii) a diverting side hole; and (iv) at least one barb on the tube exterior for positioning the diverting said hole away from the wall of the blood vessel such that fluid flowing in the first tube exits the distal tip opening in a first direction and exits the diverting side hole in a second direction opposite of the first direction, the diverting side hole being formed in a depression in the first tube for diverging fluid flow in the second direction.

Claim 3

A cannula, as recited in claim 1, wherein the tube is radiopaque.

Claim 4

A cannula, as recited in claim 1, wherein the first tube further comprises a first barb and a second barb which are positioned adjacent the diverting side hole.

Claim 5

A cannula, as recited in claim 3, wherein the diverting side hole is positioned in a depression in the tube exterior between the first and second barbs.

Claim 6

A cannula, as recited in claim 1, further comprising a hub assembly connected to the proximal end of the first tube, said hub assembly including a transparent flexible hub such that when the diverting side hole enters the blood vessel, blood flows into the hub region and provides a visual indication of the proper placement of the diverting side hole.

Claim 7

A cannula, as recited in claim 5, further comprising: a dilator assembly which is positioned inside of the first tube, including: (i) a second tube having a distal end with a first diameter which occludes the first tube distal tip opening and a proximal end with a second diameter which is less than the first diameter, and (ii) a dilator hub which is connected to the hub assembly and the proximal end of said second tube such that a hollow passage is formed between the first and second tubes which allows blood entering the diverting side hole to flow into the hub assembly region.

Claim 8

A cannula, as recited in claim 1, wherein the barb further comprises: a) a distal facing portion with a shallow slope which facilitates insertion of the cannula into a blood vessel, and b) a proximal facing portion with a steep slope which may abut the inner wall of the blood vessel and prevent inadvertent extraction of the diverting side hole outside of the vessel.

Claim 11

A bidirectional cannula, for insertion into a blood vessel wall, comprising (a) a first tube including (i) a proximal end; (ii) a distal tip with an opening; (iii) a diverting side hole; and (iv) at least one barb on the tube exterior to position the diverting side hole away from the blood vessel wall such that fluid flowing in the first tube exits the distal tip opening in a first direction and exits the diverting side hole in a second direction; (b) a hub assembly including: (i) a transparent flexible hub coupled to the first tube proximal end; (ii) a rigid barbed connector coupled to said hub; (iii) an air bleed hole connected to said hub; and (iv) a flange, connected to the hub, for fixing the hub assembly; (c) a dilator assembly, which is positioned inside of the first tube, including: (i) a second tube having a distal end with a first diameter which occludes the first tube distal tip opening and a proximal end with a second diameter which is less than the first diameter, within the (ii) a dilator hub which fits w hub assembly and into the proximal end of the second tube such that a hollow passage is formed between the first tube and the second tube which allows blood entering the diverting side hole to flow into the hub assembly region; (iii) a guide wire lumen in the second tube interior; and (iv) a guide wire in the second tube lumen.

Claim 12

A bidirectional cannula, for insertion into a blood vessel wall, comprising (a) a first tube including (i) a proximal end; (ii) a distal tip with an opening; (iii) a diverting side hole; and (iv) at least one barb on the tube exterior to position the diverting side hole away from the blood vessel wall such that fluid flowing in the first tube exits the distal tip opening in a first direction and exits the diverting side hole in a second direction; (b) a hub assembly including: (i) a transparent flexible hub coupled to the first tube proximal end; (ii) a rigid barbed connector coupled to said hub; (iii) an air bleed hole connected to said hub; and (iv) a flange, connected to the hub, for fixing the hub assembly; (c) a dilator assembly, which is positioned inside of the first tube, including: (i) a second tube having a distal end with a first diameter which occludes the first tube distal tip opening and a proximal end with a second diameter which is less than the first diameter, within the (ii) a dilator hub which fits w hub assembly and into the proximal end of the second tube such that a hollow passage is formed between the first tube and the second tube which allows blood entering the diverting side hole to flow into the hub assembly region; (iii) a guide wire lumen in the second tube interior; and (iv) a guide wire in the second tube lumen.

Claim 13

A bidirectional cannula comprising: a first tube including: (i) a proximal end; (ii) a distal tip with an opening; (iii) a diverting side hole; (iv) at least one barb on the tube exterior to position the diverting side hole away from the wall of the blood vessel such that fluid flowing in the first tube exits the distal tip opening in a first direction and exits the diverting side hole in a second direction; and hole in a second direction; and a hub assembly connected to the proximal end of the first tube, said hub assembly including a transparent flexible hub such that when the diverting side hole enters the blood vessel, blood flows into the hub region and provides a visual indication of the proper placement of the diverting side hole.

Claim 14

A bidirectional cannula comprising: a first tube including: (i) a proximal end; (ii) a distal tip with an opening; (iii) a diverting side hole; (iv) at least one barb on the tube exterior to position the diverting side hole away from the wall of the blood vessel such that fluid flowing in the first tube exits the distal tip opening in a first direction and exits the diverting side hole in a second direction; and hole in a second direction; and a hub assembly connected to the proximal end of the first tube, said hub assembly including a transparent flexible hub such that when the diverting side hole enters the blood vessel, blood flows into the hub region and provides a visual indication of the proper placement of the diverting side hole.