Method and probe for measuring the impedance of human or...

Details Method and probe for measuring the impedance of human or... Method and probe for measuring the impedance of human or...

2011-03-29

2011-03-29

Hlndenburg, Max (Department: 3736)

Surgery

Diagnostic testing

Measuring electrical impedance or conductance of body portion

Reexamination Certificate

active

07917203

ABSTRACT:
A method for determining whether a probe for measuring the impedance of human or animal body tissue has been placed over a boundary between different tissue types is described. The probe used in the method comprises at least a first (16), a second (22), a third (18) and a fourth (20) electrode arranged such that the third (18) and fourth (20) electrodes are each located substantially the same distance from both the first (16) and second (22) electrodes. The method comprises: driving a current between the first (16) and the second (22) electrodes; measuring a first value of an electrical parameter between the third (18) and the fourth (20) electrode; and determining whether the probe has been placed over a boundary between different tissue types based on the first value. A probe for carrying out the method is also described.

REFERENCES:
patent: 5184624 (1993-02-01), Brown
patent: 5630426 (1997-05-01), Eggers et al.
patent: 2003/0105411 (2003-06-01), Smallwood et al.
patent: 2003/0216661 (2003-11-01), Davies
patent: 1078597 (2001-02-01), None
patent: WO01/67098 (2001-09-01), None

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