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Balloon catheter with balloon protection sheath
| Details |
Inventors: Klunder, Rento Willem; Van Werven-Franssen, Gerda Hendrika Maria;
Assignee: Cordis Corporation (Miami Lakes, FL)
Primary Examiner: Lewis; William
Assistant Examiner:
Attorney, Agent or Firm: Collins; Henry W.
The balloon catheter comprises a basic tubular body having a distal end and a proximal end. A balloon member is arranged on the distal end and, close to the balloon member, is arranged an elongate, elastic balloon protection sheath. A pull thread is connected to an end of the sheath facing toward the balloon member and extends to the proximal end of the basic tubular body. The sheath can be pulled over the balloon member by pulling the pull thread. |
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DETAILED DESCRIPTION According to the present invention, there is provided a balloon catheter comprising a basic tubular body having a distal end and a proximal end.
A balloon member is arranged on the distal end and, close to the balloon member, is arranged an elongate, elastic balloon protection sheath.
A pull thread is connected to an end of the sheath facing toward the balloon member and extends to the proximal end of the basic tubular body.
The sheath can be pulled over the balloon member by pulling the pull thread.
In the situation where the sheath over the balloon member uses at least one pull thread, the balloon protection sheath provides a great resistance to damage to the balloon member while, at the same time, not enlarging the effective diameter of the balloon catheter at the position of the balloon member when the balloon catheter is inserted, because it is located off to the side of the balloon member on or within an adjoining portion of the basic tubular body.
After insertion of the balloon catheter in the situation where the balloon protection sheath is pushed off the balloon member and, thus, has the smallest possible diameter, the balloon protection sheath can be slid onto the balloon member by pulling on the pull thread, whereafter the balloon member can be expanded in the usual manner.
In the expanded active situation, the balloon member is optimally protected against mechanical influences from outside by the balloon protection sheath.
The balloon protection sheath can be a sleeve slidable over the basic body of the catheter and is elastically stretchable in the longitudinal direction of the basic tubular body and has an end remote from the balloon member fixedly connected to the basic tubular body.
The position of the balloon protection sheath then is determined clearly so that reliable operation can be achieved.
Preferably, the basic tubular body has at least one lumen and the pull thread is guided through the lumen.
By guiding the pull thread through the lumen, the pull thread and the basic tubular body act, respectively, as the inner cable and the outer cable of a pull cable
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