Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
90 words
A cannula comprising: a hollow elongated rod having a distal end and a proximal end with an opening at each end forming a first channel: a sheath slidably mounted on the elongated hollow rod; a handle mounted to said hollow rod, the handle including a first stop adjacent the proximal end of the elongated rod, and the distal end of the rod includes a second stop, the first and second stops defining a linear path of travel for the sheath; and means for introducing a vacuum into the first channel.
Claim 2
Dependent Claim
90 words
A cannula comprising: a hollow elongated rod having a distal end and a proximal end with an opening at each end forming a first channel: a sheath slidably mounted on the elongated hollow rod; a handle mounted to said hollow rod, the handle including a first stop adjacent the proximal end of the elongated rod, and the distal end of the rod includes a second stop, the first and second stops defining a linear path of travel for the sheath; and means for introducing a vacuum into the first channel.
Claim 3
Dependent Claim
41 words
The cannula of claim 1 further comprising a second channel formed by a capillary tube inside the first channel, the capillary tube extending from an inlet at the proximal end to the outlet at the distal end of the hollow rod.
Claim 4
Dependent Claim
22 words
The cannula of claim 1, further comprising a second channel formed by an annular duct between the hollow rod and said sheath.
Claim 5
Dependent Claim
26 words
The improved cannula of claim 1 wherein the handle has a hexagonal profile with a recessed region adjacent a first end sized to receive a thumb.
Claim 6
Dependent Claim
28 words
The improved cannula of claim 1 wherein the distal end of the hollow rod an attached tip and a plurality of openings circumferentially spaced about said attached tip.
Claim 7
Dependent Claim
172 words
A bi-channel cannula for injecting fluid into a subdermal region and simultaneously removing material from the subdermal region comprising: a hollow base having a nozzle at a first end in communication with a channel extending to a second end; a needle having a distal end and a proximal end, the distal end including a tip with an aperture, the proximal end connected to the second end of the base such that a lumen of the needle and the channel form a conduit from the aperture at the tip of the needle to the nozzle of the base; a capillary tube disposed within the conduit having an inlet at the base and an outlet at the tip of the needle; a slidable sheath disposed about the shaft between the distal and proximal ends; and the hollow base including a first stop adjacent the proximal end of the needle, and the distal end of the needle including a second stop, the first and second stops defining a linear path of travel for the sheath.
Claim 8
Dependent Claim
172 words
A bi-channel cannula for injecting fluid into a subdermal region and simultaneously removing material from the subdermal region comprising: a hollow base having a nozzle at a first end in communication with a channel extending to a second end; a needle having a distal end and a proximal end, the distal end including a tip with an aperture, the proximal end connected to the second end of the base such that a lumen of the needle and the channel form a conduit from the aperture at the tip of the needle to the nozzle of the base; a capillary tube disposed within the conduit having an inlet at the base and an outlet at the tip of the needle; a slidable sheath disposed about the shaft between the distal and proximal ends; and the hollow base including a first stop adjacent the proximal end of the needle, and the distal end of the needle including a second stop, the first and second stops defining a linear path of travel for the sheath.
Claim 9
Dependent Claim
25 words
The cannula of claim 6 wherein the base has a hexagonal profile with a recessed area at the second end sized to receive a thumb.
Claim 10
Dependent Claim
16 words
The cannula of claim 6 wherein the tip includes a plurality of apertures circumferentially spaced thereabout.