CATHETER SYSTEMS FOR APPLYING EFFECTIVE SUCTION IN REMOTE VESSELS AND THROMBECTOMY PROCEDURES FACILITATED BY CATHETER SYSTEMS
First Claim
1. A suction catheter system comprising:
- a guide catheter comprising a tubular shaft with a central lumen having an inner diameter, a proximal end and a distal opening, and a proximal section operably connected with the proximal end of the tubular shaft and having fittings that connect to a suction device; and
a suction extension comprising a proximal portion, a suction tip comprising a distal opening and extending from the proximal portion in a distal direction, and a control structure connecting the proximal portion with the proximal section of the guide catheter, the suction tip having a distal inner diameter that is from about 20 percent to about 90 percent of the central lumen inner diameter, wherein the proximal portion is configured to slide within the central lumen of the tubular shaft to change the relative position of the proximal portion within the central lumen and provide for at least a portion of the narrow diameter suction extension to extend outward from the distal opening of the tubular shaft at appropriate configurations of the proximal portion, wherein an effective seal is formed by a tight fit between the proximal portion and the central lumen of the guide catheter and wherein the proximal portion has a lateral extent from about 5 millimeters (mm) to about 25 centimeters (cm),wherein a suction lumen is formed extending from the fitting configured to connect to the suction device through a portion of the central lumen, the proximal portion and the suction tip to a distal opening.
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Accused Products
Abstract
A suction catheter system is described with a suction nozzle that can extend from a guide catheter of the like. The suction nozzle can be positioned by tracking the suction nozzle through a vessel while moving a proximal portion of the suction extension within the lumen of the guide catheter. A suction lumen extends from the proximal end of the guide catheter through at least part of the guide catheter central lumen and through the suction tip. Desirable suction flow can be established using the guide lumen to facilitate the suction. Also, a delivery catheter is described with an elastic tip that can track closely over a guidewire. The elastic tip of the delivery catheter can be expanded to provide for the delivery of medical devices past the tip.
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Citations
25 Claims
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1. A suction catheter system comprising:
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a guide catheter comprising a tubular shaft with a central lumen having an inner diameter, a proximal end and a distal opening, and a proximal section operably connected with the proximal end of the tubular shaft and having fittings that connect to a suction device; and a suction extension comprising a proximal portion, a suction tip comprising a distal opening and extending from the proximal portion in a distal direction, and a control structure connecting the proximal portion with the proximal section of the guide catheter, the suction tip having a distal inner diameter that is from about 20 percent to about 90 percent of the central lumen inner diameter, wherein the proximal portion is configured to slide within the central lumen of the tubular shaft to change the relative position of the proximal portion within the central lumen and provide for at least a portion of the narrow diameter suction extension to extend outward from the distal opening of the tubular shaft at appropriate configurations of the proximal portion, wherein an effective seal is formed by a tight fit between the proximal portion and the central lumen of the guide catheter and wherein the proximal portion has a lateral extent from about 5 millimeters (mm) to about 25 centimeters (cm), wherein a suction lumen is formed extending from the fitting configured to connect to the suction device through a portion of the central lumen, the proximal portion and the suction tip to a distal opening. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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2-3. -3. (canceled)
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16. A method for performing a medical procedure in a bodily vessel using a suction catheter system comprising a guide catheter and a suction extension slidably engaged with the guide catheter, the suction extension comprising a proximal portion configured to remain in a central lumen of the guide catheter and a suction tip extending in a distal direction from the proximal portion, the method comprising:
tracking the suction tip to a desired location within a vessel by sliding the suction extension relative to the guide catheter. - View Dependent Claims (17, 18, 23, 24, 25)
- 19. A delivery catheter comprising a proximal tubular element having an outer diameter from about 1 mm to about 3 mm and a distal tubular element comprising a distal opening and extending from the distal end of the proximal tubular element wherein the distal tubular element has an initial inner diameter no more than about 1.5 mm and at least a factor of two smaller than the proximal tubular element inner diameter, and is formed from an elastic material that can stretch to at least about 1.5 times greater than the initial inner diameter.
Specification