1
Rodney W Salo, V A Kadhiresan, Kevin G Nugent: Multi-site impedance sensor using coronary sinus/vein electrodes. Cardiac Pacemakers, Nikolai Mersereau & Dietz P A, August 21, 2001: US06278894 (254 worldwide citation)

A method and apparatus for performing impedance plethysmography on a living heart for diagnostic and therapy purposes involves placement of plural leads where at least one is disposed within a coronary vein traversing the myocardium on the left side of the heart with another lead having plural elect ...


2
Donald N Jensen, Linda L Ruetz, Catherine R Condie, Yong Kyun Cho, Ulla Strobel, Scott Davie: Method and apparatus for monitoring heart rate and abnormal respiration. Medtronic, Girma Wolde Michael, Michael C Soldner, Paul H McDowall, June 22, 2004: US06752765 (194 worldwide citation)

An implantable device having enhanced capabilities for monitoring a patient's heart rate and respiration trends over extended periods of time is disclosed. The information collected by the implantable device may be stored and telemetered to an associated external device such as a device program ...


3
Yoav Kimchi, David Prutchi, Itzhak Shemer: Apparatus and method for determining a mechanical property of an organ or body cavity by impedance determination. Impulse Dynamics, William H Dippert, Cowan Liebowitz & Latman P C, March 19, 2002: US06360123 (191 worldwide citation)

Apparatus and method for determining a mechanical property of an organ or a body part. The method includes positioning an impedance sensor within a blood vessel. The impedance sensor has at least two electrodes disposed within the blood vessel, which is mechanically coupled to the organ or body part ...


4
Bertram Schilling, Udo Trockweiler: Electrosurgical high frequency generator. Gebrueder Berchtold & Co, Townsend and Townsend and Crew, November 2, 1999: US05976128 (188 worldwide citation)

An electrosurgical high frequency generator has a high frequency oscillator and, connected thereto, a regulatable power stage to which a patient current circuit with active and neutral electrodes can be connected via an output transformer. Three parameter sensors for the high frequency current, the ...


5
Brian S Kelleher, Corbett Stone, Michael Jones: Device and method for ablation of tissue. Endonetics, Nydegger & Associates, August 29, 2000: US06112123 (176 worldwide citation)

A device and method for performing electrolyte assisted tissue ablation of metaplasia in the esophagus includes a shaft with an expandable barrier which is deployable from the shaft's distal end. Also included in the device are an electrode and a temperature/impedance sensor which are each mounted o ...


6
V A Kadhiresan: Apparatus and method for monitoring respiratory function in heart failure patients to determine efficacy of therapy. Cardiac Pacemakers, Nikolai Mersereau & Dietz P A, October 26, 1999: US05974340 (170 worldwide citation)

The respiratory function of a patient is measured for diagnostic purposes using a cardiac rhythm management device. Monitoring of the respiratory activity is initiated after a microprocessor in the cardiac rhythm management device determines that the patient has been at rest for a predetermined leng ...


7
Roy L Testerman: Method and apparatus for impedance detecting and treating obstructive airway disorders. Medtronic, Daniel W Latham, Harold R Patton, July 30, 1996: US05540732 (151 worldwide citation)

A method for treating upper respiratory obstructions in a patient by electrical stimulation of muscles of the upper airway including surgically implanting a impedance sensing circuit into the patient such that the impedance sensor is capable of providing a signal characteristic of transthoracic impe ...


8
Lum Paul, Melton Jr Hewlett E, Simons Tad Decatur, Greenstein Michael: Hypodermic needle having an impedance sensor for sensing penetration depth. Hewlett Packard Co, October 6, 1999: GB2335990-A (142 worldwide citation)

An apparatus 100 having a shaft 102 that can sense the depth of penetration, for penetrating into an object (the substrate). The substrate being penetrated has impedance that varies according to the depth under a surface of the substrate. The shaft 102 has a tip 114 for penetration and has conductiv ...


9
Ivar Giaever, Charles R Keese: Cell substrate electrical impedance sensor with multiple electrode array. Rensselaer Polytechnic Institute, Notaro & Michalos, February 16, 1993: US05187096 (129 worldwide citation)

An apparatus and method for monitoring cell-substrate impedance comprises upper and lower substrates each containing strips of metal foil which cross to form well areas. Holes in the upper substrate expose an insulation layer between the upper and lower substrates. Smaller holes in the insulation la ...


10
Felix Daners: Device for monitoring a neutral electrode during HF surgery. Storz Endoskop, St Onge Steward Johnston & Reens, August 14, 2001: US06275786 (111 worldwide citation)

The invention refers to a device for monitoring the application of a neutral electrode in unipolar HF surgery, having an impedance sensor with a resonant circuit comprising a secondary coil of a transformer and HF input capacitors of preferably two partial electrode surfaces. The impedance sensor de ...