Abstract:
A double tube from which a balloon catheter having a high rigidity and a low fluid resistance can be easily produced by means of an extruder or the like, an apparatus for producing the double tube, a balloon catheter produced by using the double tube, and a process for producing the balloon catheter are provided. The double tube comprises an outer tube having a lumen extending from the far end to the proximal end, and an inner tube which is provided within the outer tube and has a lumen extending from the far end to the proximal end, wherein a long material in the strip form is provided as a connecting member which continuously connects the inner surface of the outer tube to the outer surface of the inner tube in the axial direction. A balloon catheter can be easily produced by using this double tube. An apparatus for producing a double tube is also provided which comprises a first extruding means for extruding a resin for forming an outer tube portion, a second extruding means for extruding a resin for forming an inner tube portion, and a die for forming tubes respectively from the extrudate from the first extruding means and the one from the second extruding means.
Abstract:
This invention relates to a balloon dilatation catheter (1) and its preparation. The balloon dilatation catheter (1) comprises a first, inflation lumen (2) extending therethrough and having distal and proximal ends, the distal end of the first lumen (2) opening into and being in fluid communication with the interior of an inflatable dilatation balloon (4) having distal and proximal ends, and a second lumen (3) extending coextensively with the first lumen (2) and having proximal (18) and distal (10) portions. The distal end of the second lumen (3) is open, the distal portion (10) of the second lumen (3) has an opening (9) proximal, adjacent, or distal to the proximal end of the dilatation balloon (4), the portion (10) of the second lumen (3) distal to the opening is enlarged as compared to the proximal portion (18) to facilitate receiving a guidewire (8) in a sliding fit, and the portion (18) of the second lumen (3) proximal to the opening (9) contains a pushing wire (5).
Abstract:
Cathéter allongé (41111) ayant une surface intérieure et une surface extérieure, la surface extérieure définissant un passage (81111) traversant le cathéter. Le cathéter présente en outre une cavité enfermée (451111) entre les surfaces intérieure et extérieure qui encercle le passage. La cavité possède une paroi interne et une paroi externe, cette dernière étant un manchon élastique qui peut s'étirer généralement indépendamment de la paroi interne. La cavité contient une quantité d'une substance appropriée de lubrification (381111) efficace pour permettre au manchon élastique de glisser le long d'une surface externe de la paroi interne tout en étant en contact de lubrification avec celle-ci lorsque le manchon est étiré indépendamment de la paroi interne, les parois interne et externe étant jointes aux extrémités proximales de l'extrémité distale de la cavité enfermée. Un procédé automatisé de production de ce cathéter comprenant une série d'étapes d'immersion automatisée est également décrit. Un cathéter de ''Foley'' ayant une partie ballon et un manchon élastique lubrifié, comme décrit ci-dessus, est également divulgué, tout comme le sont des procédés de fabrication de ce cathéter.
Abstract:
The device has a stem portion (21) comprising at least a first tube (22) disposed within a second tube (23) the tubes being joined at one pair of ends by a flexible member (24) covering the opening (25) of the passage (26) formed between the inner tube and the outer tube. The flexible member is arranged such that the tubes are movable relative to each other and by movement of the inner tube away from or towards the one end of the outer tube the flexible member respectively either can be drawn within the adjacent one end of the outer tube to be enclosed within the outer tube or pushed outside the adjacent one end of the outer tube to expose a balloon (24). The balloon can be inflated within the body cavity using a fluid under pressure supplied to the balloon from outside the body through said passage (26).
Abstract:
Reinforced medico-surgical tubes are produced by first extruding a flexible tube, cooling it, then coiling a filament helix about the cooled tube, extruding an outer layer of flexible material over the helix and base tube, cutting the resulting laminated tube into sections and forming filament-free ends on the cut sections.
Abstract:
Infusion balloon catheter with fortified proximal infusion outlet port, and manufacturing thereof. Infusion balloon catheter includes: inflatable balloon member; shaft having distal end attached to balloon member, and shaft wall enclosing: first lumen providing passage to balloon inflation fluid, and second lumen providing passage to infusion fluid and guidewire; and bending-resistant insert member housed in second lumen and located proximally to balloon member, insert member is affixed to, and conforms to shape of, shaft inner wall surface, and includes one or more openings(s). Shaft wall has infusion outlet port located along, and providing opening to, second lumen proximally to balloon member. Insert opening(s) is/are in direct fluid communication with infusion outlet port whose cross-sectional area is larger than that of infusion inlet opening. Bending-resistant insert member provides fortifying structural support to shaft wall portion surrounding infusion outlet port. Applicable to medical procedures involving injection of imaging contrast material or/and drugs.
Abstract:
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.