摘要:
A medical device-includes a scaffold crimped to a catheter having an expansion balloon. The scaffold is crimped to the balloon by a process that includes one or more balloon pressurization steps. The balloon pressurization steps are selected to enhance scaffold retention to the balloon, maintain a relatively uniform arrangement of balloon folds about the inner surface of the crimped scaffold so that the scaffold expands in a uniform manner when the balloon is inflated, and to avoid any possible over-stretching of balloon material.
摘要:
A medical device-includes a scaffold crimped to a catheter having an expansion balloon. The scaffold is crimped to the balloon by a process that includes one or more balloon pressurization steps. The balloon pressurization steps are selected to enhance scaffold retention to the balloon, maintain a relatively uniform arrangement of balloon folds about the inner surface of the crimped scaffold so that the scaffold expands in a uniform manner when the balloon is inflated, and to avoid any possible over-stretching of balloon material.
摘要:
A multi-lumen catheter (100) comprising: a tubular shaft member (110) having a proximal end, a distal end and a longitudinal length therebetween, the tubular shaft member having a first lumen (212) and a second lumen (214) defined therein, the first lumen having a first lumen cross-sectional dimension and a length extending at least along a portion of the length of the tubular shaft member, and the second lumen having a second lumen cross-sectional dimension and a length extending along the length of tubular shaft member, characterized in that the tubular shaft member is a monolithic elongate tubular shaft member having an inner core (210) made of a first material, an outer layer (220) made of a second material, and an intermediate tie layer disposed between the inner core and the outer layer, the first material of the inner core defining the first lumen and the second lumen therein, the first lumen cross-sectional dimension being substantially uniform along the length of the first lumen, the second lumen cross-sectional dimension being substantially uniform along the length of the second lumen, and the tubular shaft member having an outer cross-sectional dimension that varies along the length of the tubular shaft member.
摘要:
Articulation devices, systems, methods for articulation, and methods for fabricating articulation structures will often include simple balloon arrays, with inflation of the balloons interacting with elongate skeletal support structures so as to locally alter articulation of the skeleton. The balloons can be mounted to a substrate of the array, with the substrate having channels that can direct inflation fluid to a subset of the balloons. The articulation array structure may be formed using simple planar 3-D printing, extrusion, and/or micromachining techniques. The skeleton may comprise a simple helical coil, and the array can be used to locally deflect or elongate an axis of the coil under control of a processor. Inflation fluid may be directed to the balloons from an inflation fluid reservoir of an inflation system, with the inflation system preferably including valves controlled by the processor. The articulation structures can be employed in minimally invasive medical catheter systems, and also for industrial robotics, for supporting imaging systems, for entertainment and consumer products, and the like.
摘要:
Everting balloon systems and methods for using the same are disclosed herein. The systems can be configured to access and dilate body lumen and cavities. For example, the systems can be used to dilate the cervix and access the uterine cavity. The systems can also be used to occlude the cervix. The systems can also be used to occlude the urethra.
摘要:
Articulating balloon catheters are described herein. An embodiment of an articulating balloon catheter comprises an elongate member (216) and a balloon (220). The balloon is attached to the elongate member and is adapted to move between a deflated configuration and an inflated configuration. The balloon has a proximal portion (270), a distal portion (272), and an articulating region (268) disposed between the proximal portion and the distal portion. The articulating region of the balloon is configured to provide articulation between the proximal portion and the distal portion of the balloon.
摘要:
A multi-lumen catheter (100) comprising: a tubular shaft member (110) having a proximal end, a distal end and a longitudinal length therebetween, the tubular shaft member having a first lumen (212) and a second lumen (214) defined therein, the first lumen having a first lumen cross-sectional dimension and a length extending at least along a portion of the length of the tubular shaft member, and the second lumen having a second lumen cross-sectional dimension and a length extending along the length of tubular shaft member, characterized in that the tubular shaft member is a monolithic elongate tubular shaft member having an inner core (210) made of a first material, an outer layer (220) made of a second material, and an intermediate tie layer disposed between the inner core and the outer layer, the first material of the inner core defining the first lumen and the second lumen therein, the first lumen cross-sectional dimension being substantially uniform along the length of the first lumen, the second lumen cross-sectional dimension being substantially uniform along the length of the second lumen, and the tubular shaft member having an outer cross-sectional dimension that varies along the length of the tubular shaft member.
摘要:
A catheter (4) comprising a connector (8) with a guide wire channel (12) and an inflation channel (16), a shaft (20) extending from a proximal end (24) to a distal end (28) and having a guide wire lumen (32) and an inflation lumen (36), the shaft (20) being connected, at its proximal end (24), to the connector (8) so that said guidewire lumen (32) and inflation lumen (36) are mechanically and fluidically connected with said guide wire channel (12) and inflation channel (16) respectively. The connection is realised in correspondence of a kink portion (44). The catheter (4) comprises a protective sheath (52) placed around an external wall (56) of the shaft (20) and extending from a first sheath end (60), axially placed at a first distance (L1) from the proximal end (24) of the shaft (20) so as to allow a direct contact and a fixing between the external wall (56) of the shaft (20) and the internal wall (64) of the kink portion (44), to a second sheath end (68), axially extending at least in correspondence of a second kink end (42) of the kink portion (44), so as to avoid a direct contact and a fixing between the external wall (56) of the shaft (20) and the internal wall (64) of the kink portion (44).
摘要:
The application relates to a shaft (10) for medical devices comprising an inner tube (11) and an outer tube (12), wherein the inner tube (11) and the outer tube (12) extend concentrically with a common longitudinal axis from a proximal end (15) to a distal end (16) of the shaft (10), and a spiral wall (13) projecting radially outwards from the inner tube (11). Further, the invention relates to a catheter having such a shaft (10).