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Combination sheath and catheter for cardiovascular use
| Details |
Inventors: Stratienko, Alexander Andrew;
Assignee:
Primary Examiner: Bockelman; Mark
Assistant Examiner:
Attorney, Agent or Firm: Chambliss, Bahner & Stophel, P.C.
A vascular interventional device may be introduced over a guidewire into a vessel of the cardiovascular system of a patient. This device includes a hollow, flexible tube having a proximal end and a distal end that is adapted to selectively engage a target vessel of the cardiovascular system of the patient. This tube also includes a lumen that is continuous from the proximal to the distal end, and has an end hole in the distal end that is in fluid communication with the lumen. A plurality of side holes are provided near the distal end of the tube, each of which is in continuous fluid communication with the lumen. The device also includes a hollow vessel dilator that is adapted for insertion into and through the tube and over the guidewire. The dilator has an inside diameter that is slightly larger than the guidewire and an outside diameter that is slightly smaller than the diameter of the lumen of the tube. The distal end of the dilator is adapted to accommodate vascular entry over the guidewire, and the dilator is adapted to dilate the vessel to accept the tube. The device also includes a hub at the proximal end of the tube. The hub includes an end port through which a second interventional device having an outside diameter smaller than the diameter of the lumen may be introduced into the lumen of the tube. The hub also includes a side port through which a fluid agent may be injected for delivery through the lumen and out the end hole and side holes of the tube. A sealing mechanism is also provided in the hub to prevent air from entering the tube and blood and other fluids from leaking out of the tube through the hub. A pair of vascular interventional devices, at least one of which is constructed according to the invention, may be utilized to treat or study a cardiovascular condition, or to measure the blood pressure across a vascular segment. |
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DETAILED DESCRIPTION A vascular interventional device is provided that may be introduced over a guidewire into a vessel of the cardiovascular system of a patient.
This device includes a hollow, flexible tube having a proximal end and a distal end, and a lumen that is continuous from the proximal to the distal end.
An end hole in the distal end is in fluid communication with the lumen, and a plurality of side holes are provided near the distal end of the tube, each of which is in continuous fluid communication with the lumen.
The distal end of the tube is adapted to selectively engage a target vessel of the cardiovascular system of the patient.
The device also includes a hollow vessel dilator that is adapted for insertion into and through the tube and over the guidewire.
The dilator has an inside diameter that is slightly larger than the guidewire, and an outside diameter that is slightly smaller than the diameter of the lumen of the tube.
The distal end of the dilator is tapered to accommodate vascular entry over the guidewire.
The dilator is adapted to dilate the vessel to accept the tube.
The device also includes a hub at the proximal end of the tube.
The hub includes an end port through which a second interventional device having an outside diameter smaller than the diameter of the lumen (including a second interventional device having a pressure transducer connected thereto) may be introduced into and through the lumen of the tube.
The hub also includes a side port through which a fluid agent may be injected for delivery through the lumen and out the end hole and side holes of the tube, or through which pressures can be measured, using a pressure transducer that may be connected thereto.
A sealing mechanism is also provided in the hub to prevent air from entering the tube and blood and other fluids from leaking out of the tube through the hub.
The invention also includes a method for treating or studying a cardiovascular condition of a patient, using two vascular interventional devices, at least one of which (a first vascular interventional device) includes a hollow, flexible tube, a hub and a dilator, as described above
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Heart Surgery 
