LEONARD EISENFELD, MD
Medical Practice at Washington St, Hartford, CT

6044284, Mar 28, 2000

Oct 8, 1998

9/168586

Leonard I. Eisenfeld - West Hartford CT
John Young Oh - Durham NC

A61B 500

600310

In an apparatus and method for measuring in vitro the concentration of meconium in amniotic fluid, a plurality of sensors are placed in predetermined locations throughout an amniotic sac. Each sensor includes a blue light-emitting diode having a peak transmission wavelength centered at about 430 nm, a transducer comprising a blue-enhanced photodiode for converting the light received from the light-emitting diode to a voltage signal, and an operational amplifier for amplifying the voltage signal. The light source and transducer are spaced a predetermined distance relative to each other, and define an amniotic fluid passageway therebetween for receiving the amniotic fluid. A micro-controller calculates, in accordance with an empirically-determined linear equation, the meconium concentration based on the natural log of each transducer signal. The transducer signals are continuously converted to meconium concentration readings, and generated on a display to provide a continuous, real-time, quantitative and/or qualitative assessment of the presence of, and concentration of meconium in a plurality of locations within the amniotic sac.

5555891, Sep 17, 1996

Apr 17, 1995

8/424590

Leonard I. Eisenfeld - West Hartford CT

Hartford Hospital - Hartford CT

A61B 500

128721

A vibrotactile stimulator system for detecting and interrupting apnea in premature neonates comprises a multi-sensing monitor for detecting the respiration and other physiological characteristics of the neonate, a vibrotactile sensory stimulator in contact with an extremity of the neonate and a computer interface functionally positioned between the monitor and the vibrotactile stimulator. The interface provides a comparison of the monitored data to preprogrammed individualized standards to determine variations from the standard and provides an intervention output signal to the vibrator. The stimulator includes a cutaneous vibrator engaging a peripheral sensory area of the neonate and being operable at a frequency up to about 400 Hz, but optimally about 260 Hz, to stimulate the neonate and interrupt an apneic episode. The system can include time-delayed, backup, audible and/or visual alarms as well as a graphic display with a pre-apneic printout and cribside or remote manual actuation capability.

2009031, Dec 24, 2009

Jun 22, 2009

12/488828

Leonard Eisenfeld - West Hartford CT, US
Jonathan M. Hill - West Hartford CT, US
Ronald S. Adrezin - West Hartford CT, US

A61B 7/04

381 67

An electronic stethoscope head includes a head member having a contact surface for contact with a patient's body, a transducer in the head member, and an adhesive on the contact surface. A processing system for an electronic stethoscope includes a conditioning circuit configured to receive a transducer signal from a transducer and to be capable of amplifying and/or filtering the transducer signal, to yield a conditioned signal. There is also a signal processor system configured to subject the conditioned signal to an audio editing process. Bodily sounds are detected by applying an electronic stethoscope head a patient's body; generating a patient sonograph of the patient's bodily sounds; and comparing the patient sonograph to a reference sonograph. An electronic stethoscope system may include an accessory device and control circuitry to control the accessory device when abnormal bowel sounds are detected or no bowel sounds are detected for a predetermined interval.