Powered surgical stapling device
First Claim
1. A medical instrument, comprising:
- a housing having a fixed handle;
an elongated shaft extending distally from the housing;
a tool assembly coupled to a distal end of the elongated shaft, the tool assembly including a pair of opposing tissue engaging surfaces for clamping tissue therebetween;
a movable handle mounted to the housing and selectively movable relative to the fixed handle from a first position in spaced relation relative to the fixed handle to a second position closer to the fixed handle;
a firing shaft extending at least partially through the elongated shaft, wherein the firing shaft is operatively coupled to the movable handle such that movement of the movable handle toward the second position advances the firing shaft through the elongated shaft, and wherein the firing shaft is operatively coupled to the tool assembly to induce motion in the tool assembly;
a drive assembly including a motor and a controller, wherein the motor is operatively engaged with the firing shaft to supply a longitudinal force thereto, and wherein the controller is configured to variably control a voltage supplied to the motor in response to longitudinal motion of the firing shaft.
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0 Petitions
Accused Products
Abstract
A medical instrument having a tool assembly attachable to a distal end of the medical instrument is disclosed. The tool assembly includes a pair of opposing tissue engaging surfaces for clamping tissue therebetween. The medical instrument also includes a housing having a fixed handle and a movable handle mounted to the housing and selectively movable relative to the fixed handle from a first position in spaced relation relative to the fixed handle to a second position closer to the fixed handle to actuate the clamping of tissue. The instrument further includes a selectively activatable drive assembly including a power source and a motor which is operatively coupled to the movable handle, wherein upon actuation the motor actuates the pair of opposing tissue engaging surfaces. The drive assembly also includes a controller configured to variably control the rate at which the motor actuates the pair of opposing tissue engaging surfaces in response to the force exerted on the movable handle.
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Citations
18 Claims
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1. A medical instrument, comprising:
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a housing having a fixed handle; an elongated shaft extending distally from the housing; a tool assembly coupled to a distal end of the elongated shaft, the tool assembly including a pair of opposing tissue engaging surfaces for clamping tissue therebetween; a movable handle mounted to the housing and selectively movable relative to the fixed handle from a first position in spaced relation relative to the fixed handle to a second position closer to the fixed handle; a firing shaft extending at least partially through the elongated shaft, wherein the firing shaft is operatively coupled to the movable handle such that movement of the movable handle toward the second position advances the firing shaft through the elongated shaft, and wherein the firing shaft is operatively coupled to the tool assembly to induce motion in the tool assembly; a drive assembly including a motor and a controller, wherein the motor is operatively engaged with the firing shaft to supply a longitudinal force thereto, and wherein the controller is configured to variably control a voltage supplied to the motor in response to longitudinal motion of the firing shaft. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A medical instrument, comprising
a tool assembly having a pair of opposing tissue engaging surfaces for clamping tissue therebetween and for deforming a plurality of surgical fasteners through the tissue; -
a firing shaft operatively associated with the tool assembly such that distal longitudinal advancement of the firing shaft from a first shaft position to a second shaft position approximates the tissue engaging surface to clamp the tissue and further distal advancement of the firing shaft from the second shaft position to a third shaft position deforms the plurality of surgical fasteners through the tissue; a drive assembly including a motor, wherein the motor is operatively engaged with the firing shaft to supply a distally directed longitudinal force thereto when actuated; and a handle assembly including a fixed handle and a movable handle movable between first, second and third handle positions wherein the first handle position is spaced from the fixed handle, the second handle position is closer to the fixed handle than the first handle position and the third handle position closer to the fixed handle than the second handle position, and wherein the handle assembly is operatively associated with the drive assembly and the firing shaft such that (i) movement of the movable handle from the first handle position to the second handle position moves the firing shaft from the first shaft position to the second shaft position; (ii) maintaining the movable handle at the second handle position or between the second and third handle positions actuates the motor to impart the first longitudinally directed force to move the firing shaft from the second shaft position to the third shaft position; and (iii) movement of the movable handle from the second handle position to the third handle position imparts a second distally directed longitudinal force to the firing shaft independent of the first distally directed longitudinal force imparted by the motor. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification