| 摘要 |
<p>Catheters are provided with modified distal ends (18) which reduce substantially the trauma to patients during placement of the catheter of the invention in a patient. The distal end (18) has a very soft-tip (26) of specific range of length to provide proper control without trauma during placement. Moreover the very soft tip (26) has a rounded front end (16) to eliminate any sharp edges for insertion in the patient. The invention includes a specific method in which the catheter body (28) and soft tip (26) are formed separate and comprised of very soft Shore A hardness ranges, and joined (24) together by melt-bonding with RF bonding to minimize the extent the two parts are subjected to melting and therefore minimize surface blemishes at the joint, again to reduce trauma. The rounded front (16) or distal end (18) of the tip may be formed before of after bonding by introduction into a mold for that purpose. <IMAGE></p> |
