KRISHNA NARAYANAN
Medical Practice in Pittsburgh, PA

6200326, Mar 13, 2001

Apr 28, 1999

9/301093

Krishna Narayanan - Pittsburgh PA
Marc D. Liang - Pittsburgh PA

A61B 1750

606133

A new method and apparatus for the long-term removal of hair are provided. Ultrasonic energy is transmitted to a needle passed through the skin into an individual hair follicle. The resulting cavitation of the area surrounding the hair follicle causes the hair follicle to be disrupted. The process is repeated for individual hair follicles over the selected region of the body.

5419761, May 30, 1995

Aug 3, 1993

8/101188

Krishna Narayanan - Pittsburgh PA
Marc Liang - Pittsburgh PA
Howard M. Alliger - Melville NY

Misonix, Inc. - Farmingdale NY

A61B 1720

604 22

A method for removing adipose tissue uses an elongate rigid tube or probe member having a distal end and a proximal end and an axially extending lumen. An incision is formed in a skin surface of a patient, the tube being inserted through the incision into subcutaneous adipose tissues of the patient. Upon insertion of the tube through the incision, an ultrasonic pressure wave is generated at the proximal end of the tube, the waveform being transmitted through the tube to establish a standing wave therein. The standing ultrasonic wave in the insertion tube produces cavitation bubbles at the distal end of the tube, the bubbles causing liquefaction of adipose tissues of the patient at a surgical site located distally of the distal end of the insertion tube. Suction is applied to the lumen of the tube, thereby aspirating the liquefied adipose tissues from the surgical site through the lumen. During the entire procedure, the distal end of the tube and the adipose tissues at the surgical site are maintained at approximately body temperature.

5588436, Dec 31, 1996

Oct 11, 1995

8/540852

Krishna Narayanan - Pittsburgh PA
Vasant Padmanabhan - Monroeville PA
Fredrick J. Shipko - Spring Church PA
Louis Goode - Evans City PA
Neal E. Fearnot - West Lafayette IN

Cook Pacemaker Corporation - Leechburg PA
MED Institute - West Lafayette IN

A61B 800

12866203

A pulsed Doppler probe 10 for monitoring blood flow within a blood vessel 12 includes a sheath 17 and a plurality of electrically conductive wires 26 extending through the sheath 17. The wires 26 have distal ends 28 to which an ultrasonic transducer 18 is operatively connected. The transducer 18 has an operative surface 20, and the probe 10 also includes a means 22 for fixing the orientation of the operative surface 20 with respect to at least one of a longitudinal axis 38 of the sheath 17, and the orientation fixing means 22, or with respect to the distal ends 28 of the electrically conductive wires 26. The orientation fixing means 22 includes an epoxy material 24 encasing the ultrasonic transducer 18, shaped to include a cylindrically concave surface 30. The probe 10 further includes a mesh band 44 of at least one of an absorbable material and an inert material adapted to encircle the blood vessel 12. The probe 10 also includes a remotely operable means 46 for detachably securing the orientation fixing means 22 to the mesh band 44 so that the ultrasonic transducer 18 is positioned adjacent to the blood vessel 12 with the concave surface 30 of the encasing material 24 facing the blood vessel 12.

5012797, May 7, 1991

Jan 8, 1990

7/461624

Marc D. Liang - Pittsburgh PA
Krishna Narayanan - Pittsburgh PA

Montefiore Hospital Association of Western Pennsylvania - Pittsburgh PA

A61B 1732

128 24A

Mammal skin having wrinkles can be treated to remove wrinkles by abrading elevated portions of the epithelial layer with an ultrasonic surgical tool adapted to abrade soft tissue. The subcutaneous tissue in the selected region is medicated by subcutaneous injection of anaesthetic, vaso constrictor and spreading factor in effective quantities.

4762127, Aug 9, 1988

Apr 15, 1987

7/038652

Krishna Narayanan - Pittsburgh PA
Marc D. Liang - Pittsburgh PA

The Montefiore Hospital Association of Western Pennsylvania - Pittsburgh PA

A61B 1711

128334R

An improved method for expanding the open ends of human vessels employs an expandable cell which can be inflated a bubble at the open end of a vessel. The method is carried out with a novel closed end cell which can be connected to a source of fluidized pressure such a hypodermic syringe and, in its relaxed state can be introduced into the open end of the vessel for subsequent expansion into a bubble of the desired diameter to cause uniform length extension of the open end of the vessel. The cell may be prestressed or weakened to establish the location of bubble formation within the cell.

5059202, Oct 22, 1991

Jun 21, 1990

7/541505

Marc D. Liang - Pittsburgh PA
Krishna Narayanan - Pittsburgh PA
Eugene D. Ross - Southampton PA

The Montefiore Hospital Association of Western Pennsylvania - Pittsburgh PA

A61B 1700

606150

A tendon approximator employs two connected, normally closed clamps, which are each formed from two extruded elements. The two extruded elements are connected together in their mid-region by means of non-circular cam on a base element and a corresponding non-circular cam surface on a clamping element. In the normally closed position of the individual clamps, the cam and cam surface urge the device into a jaw-closed position with the handles being spaced apart. In a preferred embodiment two of the clamps are connected by means of rods extending through corresponding handle portions of the two clamps.

5057088, Oct 15, 1991

Aug 23, 1988

7/235101

Krishna Narayanan - Pittsburgh PA
Eugene D. Ross - Southampton PA

A61M 532

604198

An improved needle guard for a syringe is provided having a tubular body. The needle guard includes a longitudinal bore and one or more slots or slits formed therein. The longitudinal bore of the guard is sized for telescopic reception of and contraction about the tubular body of the syringe. Slots or slits are arranged so as to allow deformation of the longitudinal bore of the needle guard thereby increasing the inside diameter of the longitudinal bore so as to allow axial movement of the needle guard along the tubular body of the syringe.