Hemostasis cannula system
First Claim
1. A hemostasis cannula system for piercing tissue and penetrating a blood vessel of an organism comprising:
- a cannula body having a passage therethrough adapted to receive a catheter;
a first length of hollow flexible tubing having a proximal end in fluid-tight engagement with said cannula body and an open distal end;
a hollow dilator received in a lumen of said tubing, the hollow dilator having a distal end extending beyond the open distal end of the flexible tubing;
a fluid control valve in a lumen of the hollow dilator, the fluid control valve being adapted to prevent a flow of blood through said lumen of the hollow dilator;
an elongate hollow needle received through said fluid control valve and in the lumen of said dilator, the elongate needle having a distal end extending beyond the the dilator; and
a sealed reservoir on a proximal end of the needle, the sealed reservoir being in fluid communication with a lumen of the needle and being transparent for viewing color and pulsation of blood in the reservoir.
6 Assignments
0 Petitions
Accused Products
Abstract
A hemostasis cannula system includes a cannula, a vessel dilator, an elongate hollow percutaneous needle with clear reservoir, and an obturator. The hemostasis cannula comprises a body having a passage therethrough adapted to receive a catheter as well as a vessel dilator and a specialized obturator. The parts of the system are assembleable in a plurality of configurations including an arrangement for piercing skin, tissue and blood vessels. Another arrangement is adapted for advancing the tubing comprising the cannula, deep within the blood vessel. Lastly, another arrangement is useful for pressure monitoring and fluid introduction directly into the blood vessel of an organism. In the first configuration, the needle is received within the vessel dilator which is in turn received within the tubing comprising the cannula. In the second arrangement, the distal tip needle is withdrawn into the vessel dilator to avoid injury to the vessel when the dilator and cannula are advanced. Lastly, in order to directly monitor the blood pressure, the needle and vessel dilator are replaced with a specialized obturator having a plurality of circumferentially and longitudinally spaced apart openings in fluid communication with the lumen of the obturator as well as with the body of the cannula.
123 Citations
30 Claims
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1. A hemostasis cannula system for piercing tissue and penetrating a blood vessel of an organism comprising:
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a cannula body having a passage therethrough adapted to receive a catheter; a first length of hollow flexible tubing having a proximal end in fluid-tight engagement with said cannula body and an open distal end; a hollow dilator received in a lumen of said tubing, the hollow dilator having a distal end extending beyond the open distal end of the flexible tubing; a fluid control valve in a lumen of the hollow dilator, the fluid control valve being adapted to prevent a flow of blood through said lumen of the hollow dilator; an elongate hollow needle received through said fluid control valve and in the lumen of said dilator, the elongate needle having a distal end extending beyond the the dilator; and a sealed reservoir on a proximal end of the needle, the sealed reservoir being in fluid communication with a lumen of the needle and being transparent for viewing color and pulsation of blood in the reservoir. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A hemostasis cannula system comprising:
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a body having a passage therethrough adapted to receive a catheter; a first length of hollow flexible tubing having a proximal end in fluid-tight engagement with said body and an open distal end; and
,an elongate hollow obturator received in a lumen of said first length of hollow flexible tubing with a proximal end of the obturator in fluid-tight engagement with said body and a distal end in fluid tight engagement with said lumen of the flexible tubing at the distal end of the flexible tubing to prevent blood from entering between said lumen of the flexible tubing and said distal end of the obturator, the obturator including at least one orifice disposed between said proximal and distal ends of the obturator in a side wall of the obturator, the at least one orifice in fluid communication with i) a lumen of the elongate hollow obturator and ii) said passage in said body. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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16. A hemostasis cannula system comprising:
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a body having a passage extending longitudinally therethrough adapted to receive a catheter, and a port transverse to and communicating with the passage; a valve provided within said passage to control blood loss through the body; a hollow flexible tube having a proximal end in fluid-tight engagement with said body; a dilator removably receivable within said passage of said body and a lumen of said tube; an elongate needle removably receivable within a lumen of said dilator; and a hollow obturator removably receivable within the passage in the body and the lumen of said tube, the obturator including at least one orifice in a side wall of the obturator for providing fluid communication between a lumen of the obturator and the port of the body. - View Dependent Claims (17, 18, 19, 20, 21, 22)
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23. A hemostasis cannula system comprising:
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a cannula body having a passage adapted to receive a catheter, and a port in fluid communication with said passage; a hollow flexible tube having a proximal end in fluid-tight engagement with said cannula body; a valve in said passage to control blood loss from the hollow flexible tube through the cannula body; and
,interchangeably received in said cannula body, a one of an elongate hollow dilator and an elongate hollow obturator, the hollow obturator including at least one orifice in a side wall of the obturator providing fluid communication between a lumen of the obturator and the port of the cannula body, the hollow obturator further being adapted for fluid tight engagement with a lumen of said flexible tube at a distal end of the flexible tube to prevent blood from entering between said lumen of the flexible tube and said obturator. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30)
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Specification