摘要:
A tube device for insertion into a lacrimal passage, optimized according to the structure of a lacrimal passage and capable of being operated without impairing the functional effect of a lacrimal passage endoscope. A tube device for insertion into a lacrimal passage comprises a pair of tubes to be placed in the lacrimal passage. Openings are formed at both ends of the pair of tubes. A reinforcement body is disposed and held in the vicinity of each opening at a position located at a predetermined distance from the opening.
摘要:
Provided is a surface showing excellent antithrombotic properties. Also provided is a medical device having the same. An antithrombotic surface comprising polymer layers which are in different charged states and alternately layered, characterized by having three-dimensional peaks and valleys formed thereon. The antithrombotic surface as described above which is further characterized in that the peaks and valleys are 15 nm or more but not more than 200 nm in height and depth respectively. A medical device characterized by being provided with the antithrombotic surface as described above. Thus, a thin and highly antithrombotic surface or medical device can be obtained by a relatively convenient method.
摘要:
The therapeutic catheter comprises a lumen communicating from the user's side end to the terminal tip part thereof, a main shaft having, at its tip, a guide wire lumen, a hub at its user's side end, and a slit in the guide wire lumen through its entire length, or the therapeutic catheter comprises a main shaft having a lumen communicating from the user's side end to the terminal tip part thereof, a guide wire shaft having, at its tip, a guide wire lumen, a hub at the user's side end of the main shaft, and a slit in the guide wire shaft through its entire length. The guide wire or the shaft of the other catheter playing the role of the guide wire can be rapidly disposed in the guide wire lumen through the slit.
摘要:
The medical balloon catheter of the present invention comprises a catheter shaft composed of a distal end shaft and a proximal end shaft and a balloon on the distal end of the distal end shaft, wherein the proximal end shaft is composed of a single member and the distal end portion of the proximal end shaft is lower in rigidity than the other parts thereof. The present invention also provides a medical balloon catheter having a structure in which a tube for passing a guidewire inside thereof is arranged so as to pass inside the balloon and the balloon and tube are fused together in the vicinity of the distal end of the catheter, wherein the ratio of the outer diameter of the small-diameter portion on the distal end side of the tube to the outer diameter of the proximal end portion is no less than 0.85.
摘要:
Medical devices that are inserted into a body and that are used for treating a lumen inside a body sometimes use an insertion aid during insertion. However, there was a tendency for the relative positions of the insertion aid and the medical device to change, causing problems such as reduced operability and the insertion aid breaking the medical device during insertion. Disclosed are an insertion aid used by being placed within a medical device, and a medical device using said insertion aid. The insertion aid has a mechanism for holding said medical device from the inside, and said medical device uses said insertion aid, thereby making it possible to fix the relative positions of the insertion aid and the medical device when necessary.
摘要:
[PROBLEMS] To provide an injector for ophthalmology which can guide an implant easily to an transplant place without causing any damage to the implant when the implant is inserted into an eyeball. [MEANS FOR SOLVING PROBLEMS] The injector for an eye used for inserting an implant into an eyeball comprises an outer tube, and an implant holding structure arranged in the outer tube to be slidable with respect to the outer tube. The implant holding structure has an implant holding portion which can be contained in the outer tube and forms a space for containing the implant between the implant holding portion and the inner surface of the outer tube when it is contained in the outer tube. The implant holding portion projects from the outer tube when the implant holding structure is advanced and the implant can be taken out from the outer tube.
摘要:
It is intended to easily provide a stent for placement in body which can hold an increased amount of a drug without causing cracking or peeling in the coating layer with the dilation of the stent and from which the drug can be sustainedly released as far as possible. Namely, a stent for placement in body having a coating layer mainly comprising a drug and a polymer in at least a part of the stent surface wherein the coating layer consists of an inner layer and an outer layer, the weight ratio of drug/polymer, which is defined based on the weights of the drug and the polymer contained in each layer, of the inner layer is higher than that of the outer layer, and the outer layer contains an efficacious amount of the drug.
摘要:
As a treatment for angiostenosis, angioplasty (PTA or PTCA) of expanding a small-sized balloon in a vessel has been commonly conducted. However, this treatment easily causes repeated stenosis (restenosis) after the treatment. Placement of a stent in a vessel is also effective in decreasing restenosis, but this treatment may also cause restenosis. The present invention provides a stent containing a poly (lactide-co-glycolide) or both a poly (lactide-co-glycolide) and an immunosuppressive agent in at least a portion of a surface of the stent, and further containing a material nondegradable in vivo.
摘要:
The present invention is a balloon catheter used primarily in treatment and surgery for the purpose of dilating lesion sites such as strictures or blockages in passages in the human body. The balloon catheter of the present invention has a structure wherein a guide wire passing tubular member is deployed passing through the interior of the expansion body, and the outer surface of the tubular member and the expansion body are concentrically fused near the distal end of the catheter. This is a balloon catheter that is characterized by the fact that the Shore hardness of the material configuring the outermost surface of the tubular member is smaller than the Shore hardness of the material configuring the expansion body. It is therefore possible to flexibly adjust the tip portion formed by securing the expansion body and the guide wire passing tubular member.
摘要:
It is an object of the present invention to provide a balloon catheter in which the inner tube is prevented from slackening after balloon inflation, improving the rewrapping of the balloon, discontinuity in the rigidity of the joined portions of the outer tube and the balloon is lessened, which prevents breakage, and the catheter advances through blood vessels better and passes more easily through narrow segments, preventing the catheter from “accordioning” and enhancing insertion force transmission. The balloon catheter pertaining to the present invention has a catheter shaft (1) with a double-tube structure comprising an outer tube (4) and an inner tube (5), and a balloon (3) disposed at the distal end portion of this catheter shaft (1). A guide tube (11) having an outside diameter smaller than the inside diameter of the outer tube (4) and having an inside diameter larger than the outside diameter of the inner tube (5) is disposed at least at the distal end portion of the outer tube (4) so as to form a double-tube with the outer tube (4), and the inner tube (5) is not fixed, but passes through the interior of the guide tube (11) in the axial direction.