Surgery – Instruments – Internal pressure applicator
Patent
1995-05-04
2000-02-22
Dawson, Glenn K.
Surgery
Instruments
Internal pressure applicator
606108, 623 1, 604 96, A61M 2900
Patent
active
060275162
ABSTRACT:
A highly elastic, adjustable helical coil stent (10) has a helical coil (20) which can be contracted around a small diameter catheter (12) for percutaneous insertion into a human body and then can be remotely expanded back to its original shape when positioned at the desired location within the human body. The helical coil is preferably formed of a metal alloy (25) with high elasticity, such as superelastic Nitinol, encased within an elastomer (26). The helical coil is affixed at its distal end to a catheter and affixed at its proximal end to a control tube (30). By rotating the control tube in one direction relative to the catheter (e.g., clockwise), the helical coil contracts and by rotating the control tube in the opposite direction (e.g., counterclockwise), the helical coil expands. The adjustable helical coil stent of the present invention is particularly useful for total or partial heart assist during heart bypass procedures. It can also be used, for example, as a stent for damaged blood vessels or other body conduits in either humans or animals.
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Rossi, F., Kolobow, T., Foti, G., et al., Long-term cardiopulmonary bypass by peripheral cannulation in a model of total heart failure. J. Thorac Cardiovasc Surg 1990; 100:914-20.
Kolobow Theodor
Wang Jeffrey Y.
Chambers Guy W.
Dawson Glenn K.
The United States of America as represented by the Department of
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