Retrograde instrument
First Claim
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1. A surgical instrument assembly comprising:
- a retrograde surgical instrument comprising;
a transmission mechanism;
a proximal body segment, wherein a proximal end of the proximal body segment is coupled to the transmission mechanism;
a distal body segment;
a component coupled to a distal end of the distal body segment; and
a U-turn mechanism coupled between the proximal and the distal body segments, the U-turn mechanism comprising a proximal face, a distal face, and cable guide tubes, each of the cable guide tubes having a first end and a second end, the first end being coupled to the proximal face, and the second end being coupled to the distal face,wherein the U-turn mechanism has a constant fixed shape so that a distance between the proximal face and the distal face is unchangeable.
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Abstract
A minimally invasive surgical instrument includes a U-turn mechanism that transmits actuating forces around a U-turn. The U-turn mechanism is coupled between segments of the instrument and has a bend radius that is smaller than flexible arms having a similar cross section diameter. The actuating forces transmitted by the U-turn mechanism are used to move distal components of the instrument, such as an end effector and a wrist mechanism.
1353 Citations
18 Claims
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1. A surgical instrument assembly comprising:
a retrograde surgical instrument comprising; a transmission mechanism; a proximal body segment, wherein a proximal end of the proximal body segment is coupled to the transmission mechanism; a distal body segment; a component coupled to a distal end of the distal body segment; and a U-turn mechanism coupled between the proximal and the distal body segments, the U-turn mechanism comprising a proximal face, a distal face, and cable guide tubes, each of the cable guide tubes having a first end and a second end, the first end being coupled to the proximal face, and the second end being coupled to the distal face, wherein the U-turn mechanism has a constant fixed shape so that a distance between the proximal face and the distal face is unchangeable. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method comprising:
transmitting actuating forces from a transmission mechanism through a U-turn mechanism, the U-turn mechanism comprising a proximal face, a distal face, and cable guide tubes, each of the cable guide tubes having a first end and a second end, the first end being coupled to the proximal face, and the second end being coupled to the distal face, wherein the U-turn mechanism has a constant fixed shape so that a distance between the proximal face and the distal face is unchangeable. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A surgical instrument assembly comprising:
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a transmission mechanism; a distal component; and a U-turn mechanism, the U-turn mechanism comprising a proximal face, a distal face, and cable guide tubes, each of the cable guide tubes having a first end and a second end, the first end being coupled to the proximal face, and the second end being coupled to the distal face; wherein the U-turn mechanism is coupled between the transmission mechanism and the distal component; and wherein the U-turn mechanism has a constant fixed shape so that a distance between the distal face and the proximal face is unchangeable. - View Dependent Claims (18)
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Specification