MINIMALLY INVASIVE METHOD AND APPLICATIONS FOR INJECTIBLE MATERIALS

摘要

an orthopedic tube for delivering medical fluids, having a viscosity of at least 1 Pa.S and not to exceed 10000 Pa.S, into a bone cavity comprising an elongated hollow stem having a smooth stem outer wall. The elongated hollow stem has an external diameter sufficient to be inserted into a bone cavity formed in a bone. The elongated hollow stem has a proximal end and a distal end with the proximal end adapted to be in communication with a pressurized medical fluid injector; and the elongated hollow stem has an internal diameter sufficiently large to permit a path of least resistance to a flow of the cement from the injector. The distal end of the elongated stem is closed. There is at least a fenestration zone defined on the stem wall spaced from the distal end, and a plurality of distinct ports distributed in a pattern in the fenestration zone. The diameter of the ports in the fenestration zone determines the fluid dispersion pattern and the distribution of ports relative to the internal diameter of the elongated hollow stem is such that the fluid will fill up the hollow stem first until sufficient pressure is built up to seep the fluid through the ports in a uniform manner. Am method of measuring the density of the bone is also described.

主权项

1. A medical catheter for delivering medical fluids which have a viscosity of at least 1 Pa.S and less than 10000 Pa.S; into a body site comprising an elongated hollow stem having a smooth stem outer wall, the elongated hollow stem having an external diameter sufficient to be inserted into a body site at a body lesion; the elongated hollow stern having a proximal end and a distal end with the proximal end adapted to be in communication with a pressurized medical fluid injector; the elongated hollow stem having an internal cross-sectional area sufficiently large to permit a path of least resistance to a flow of the fluid from the injector, the distal end of the elongated stem being closed; at least a fenestration zone defined on the stem wall spaced from the distal end of the hollow stem; a plurality of distinct ports distributed in a pattern throughout the fenestration zone; the area of each port relative to the internal cross sectional area of the elongated hollow stem is such that the fluid will fill up the hollow stem first until sufficient pressure is built up to seep the fluid through the ports in a uniform manner.