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Kafe 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0021955 (1993-02-23) |
발명자 / 주소 |
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출원인 / 주소 |
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인용정보 | 피인용 횟수 : 713 인용 특허 : 0 |
A bi-directional endoscope comprising a catheter body having a tubular spring frame attached to and extending axially from the distal end thereof. The spring frame comprises a spring body which includes a tip member positioned on the distal end thereof, and a plurality of relief slots disposed there
A bi-directional endoscope comprising a catheter body having a tubular spring frame attached to and extending axially from the distal end thereof. The spring frame comprises a spring body which includes a tip member positioned on the distal end thereof, and a plurality of relief slots disposed therein for allowing the deflection of the spring frame within a first deflection plane. The relief slots are formed in the spring body in a manner defining first and second longitudinally extending stiffening portions which are oriented substantially diametrically opposite each other therewithin. Extending longitudinally through the catheter body and spring frame is a pair of activation wires which are encased by a pair of support sleeves. The spring frame is deflected by stressing the activation wires by subjecting either of the wires to a tensile force. Stressing the wires as operable to transmit the tensile force from the stressed wire to the tip member thus causing the spring body to deflect in the first deflection plane toward the stressed wire.
A guidable catheter for insertion in a mammalian body, said device comprising: (a) a flexible catheter sheath having a distal end, a proximal end and at least one lumen extending longitudinally therethrough; (b) a bending assembly positioned on the distal end of said catheter sheath, said bending as
A guidable catheter for insertion in a mammalian body, said device comprising: (a) a flexible catheter sheath having a distal end, a proximal end and at least one lumen extending longitudinally therethrough; (b) a bending assembly positioned on the distal end of said catheter sheath, said bending assembly comprising: i. a tubular spring frame having a longitudinal axis, proximal and distal ends, and a hollow bore extending longitudinally therethrough; ii. at least one first series of substantially parallel relief slots cut partway through said tubular spring frame perpendicular to the longitudinal axis thereof, each of said relief slots being of a first width having end cutout regions on either end thereof, said end cut out regions being of a second width which is greater than said first width; iii. said relief slots being sized and located relative to one another so as to render said tubular spring frame bendable in at least one lateral direction; (c) at least one tension wire extending longitudinally through said catheter sheath and through the bore of said tubular spring frame, said tension wire being connected to said tubular spring frame near the distal end thereof, said tension wire being controllable from the proximal end of said catheter sheath such that retraction of said tension wire in the proximal direction will cause said tubular spring frame to bend in a lateral direction and subsequent relaxation of said tension wire will allow said tubular spring frame to return to a straight non-bent configuration.
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