Medical device comprising a braided portion
First Claim
1. A medical device comprising an elongated tube with a proximal end for insertion into a body of a living being and an opposite distal end, the tube further comprising a conduit extending in an axial direction, and a braided portion being operable between a first configuration wherein it has a first size in a direction transverse to the axial direction and a second configuration wherein it has a second size in a direction transverse to the axial direction, the second size being larger than the first size.
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Abstract
The invention provides a medical device such as a catheter having in a proximal end a braided portion being operable between two configurations, one for insertion of the device into the body and one for retaining the catheter in the body. To reduce ingrowth of body tissue, the braided portion comprises two parts, a first part forming paths for a body liquid, e.g. urine, to be drained from the body through the device to a place of disposal, and a second part having a structure which counteracts cell adhesion better than the first part. During use, the first part is drawn into the second part whereby the cells are separated from first part by the second part and therefore ingrowth of body tissue is reduced or avoided completely. The invention further provides a method of making a device with a braided portion and being improved with respect to ingrowth of body tissue.
60 Citations
22 Claims
- 1. A medical device comprising an elongated tube with a proximal end for insertion into a body of a living being and an opposite distal end, the tube further comprising a conduit extending in an axial direction, and a braided portion being operable between a first configuration wherein it has a first size in a direction transverse to the axial direction and a second configuration wherein it has a second size in a direction transverse to the axial direction, the second size being larger than the first size.
- 20. A method of making a medical device comprising an elongated tube with a proximal end for insertion into a body of a living being and an opposite distal end, the tube further comprising a conduit extending in an axial direction, the tube comprising a braided portion with crossed filaments which form a braiding angle with the axial direction, the braided portion being operable between a first configuration wherein it has a first size in a direction transverse to the axial direction and a second configuration wherein it has a second size in a direction transverse to the axial direction, the second size being larger than the first size, and wherein passages between an outer surface of the device and the conduit are defined between the filaments, said method comprising the step of reducing the cross sections of at least a part of the braided portion by application of reduction means to the braided portion.
Specification