Hard drive vitrectomy cutter
First Claim
1. A surgical cutting device comprising:
- probe means for cutting tissue of a body, said probe means comprising an outer sleeve including perforation means, proximate a distal end of said out sleeve, for receiving a portion of the tissue, and cutter sleeve means, coaxially disposed within the outer sleeve, for shearing the portion of tissue by a linear motion thereof with respect to the outer sleeve; and
non-pneumatic mechanical means for driving of the stroking motion of the cutter sleeve means at a selected stroke rate of less than two strokes per minute.
10 Assignments
0 Petitions
Accused Products
Abstract
A hard drive vitrectomy cutter generally includes a hand held probe for cutting tissue of a body, and a mechanical system for driving cutting action of the probe. The probe includes an outer sleeve having a perforation therein for receiving a portion of tissue, and a cutter sleeve, coaxially disposed within the cutter sleeve, for shearing the portion from the body of tissue. Importantly, the mechanical system for driving the probe includes a coaxial cable having a stationary outer cable and a slidable inner cable, said coaxial cable being connected with a stepper motor adapted for moving the inner cable axially within the outer cable. The inner cable is mounted in operative relationship with the cutter sleeve such that the stepper motor may be operated to move the inner cable and consequently drive cutting strokes of the cutter sleeve. A spring may be included for biasing the cutter sleeve against a pulling force exerted by the stepper motor. An aspiration line may also be included for pulling the portion of tissue into the perforation and subsequently removing the sheared portion from the probe.
48 Citations
13 Claims
-
1. A surgical cutting device comprising:
-
probe means for cutting tissue of a body, said probe means comprising an outer sleeve including perforation means, proximate a distal end of said out sleeve, for receiving a portion of the tissue, and cutter sleeve means, coaxially disposed within the outer sleeve, for shearing the portion of tissue by a linear motion thereof with respect to the outer sleeve; and
non-pneumatic mechanical means for driving of the stroking motion of the cutter sleeve means at a selected stroke rate of less than two strokes per minute. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. A surgical cutting device comprising:
-
probe means for cutting tissue of a body, said probe means comprising an outer sleeve including perforation means, proximate a distal end of said outer sleeve, for receiving a portion of the tissue, and non-pneumatic cutter sleeve means, coaxially disposed within the outer sleeve, for shearing the portion of tissue by a linear motion thereof with respect to the outer sleeve; and
mechanical means for driving of the linear motion of the cutter sleeve means at a selected stroke rate of between about one and about 1000 strokes per minute.
-
-
8. An ophthalmic surgical cutting device comprising:
-
probe means for cutting tissue of an eye, said probe means including an outer sleeve including perforation means for receiving a portion of the tissue, and cutter sleeve means, coaxially disposed within said outer sleeve, for shearing the portion by a linear motion of the cutter sleeve with respect to the outer sleeve; and
non-pneumatic mechanical means for enabling control of individual strokes of the linear motion, said mechanical means including cable means for connecting the probe means to a stepper motor in order to drive the linear motion of the cutter sleeve means. - View Dependent Claims (9, 10, 11, 12)
-
-
13. An ophthalmic surgical cutting device comprising:
-
probe means for cutting tissue of an eye, said probe means including an outer sleeve including perforation means for receiving a portion of the tissue, and cutter sleeve means, coaxially disposed within said outer sleeve, for shearing the portion by a linear motion of the cutter sleeve with respect to the outer sleeve; and
mechanical means for enabling control of individual strokes of the linear motion, said mechanical means including an outer stationary cable and an inner cable slidably disposed therein, said inner cable being mounted in operative relationship with the cutter sleeve means, stepper motor means, connected to the inner cable, for driving the linear motion of the cutter sleeve means, and spring means for biasing the cutter sleeve means against a pulling force applied thereto by the stepper motor; and
aspiration means for drawing the portion of tissue into the outer sleeve perforation and for removing the portion of tissue from the probe means.
-
Specification