Examples of 'tissue impedance' in a sentence
Meaning of "tissue impedance"
tissue impedance - This term refers to the resistance or opposition that biological tissue presents to an alternating electric current, typically measured in ohms
How to use "tissue impedance" in a sentence
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tissue impedance
System for measuring initial tissue impedance.
Consequently tissue impedance will increase.
It may not be necessary to detect tissue impedance.
This tissue impedance is monitored during the injection procedure.
The tissue conductivity can be represented by tissue impedance.
Continuous calculations of tissue impedance are made during the injection procedure.
System and method for measuring initial tissue impedance.
Tissue impedance may be measured according to any suitable method and utilising any suitable hardware.
This keying and control are based on tissue impedance measurements.
The recorded initial tissue impedance response values provide detailed information concerning tissue between the jaws.
A predetermined characteristic of the change in tissue impedance indicates extravasation.
Such electrosurgical generators produce the same crest factor waveform across a range of tissue impedance.
It has been proposed to use measurements of tissue impedance in medical diagnosis applications.
The primary voltage of the transformer is used to sense tissue impedance.
The tissue impedance is measured at each frequency and the results titled to a Cole equation.
See also
Control may also be by the combination of tissue impedance and temperature.
As tissue impedance is capacitive, impedance tends to fall as frequency is increased.
This is especially important late in the sealing cycle as the tissue impedance rises.
This tissue impedance is affected by an extravasation such as the extravasation shown at 44.
Multi frequency impedance imaging takes advantage of the frequency dependence of tissue impedance.
Preliminary data is collected to determine the tissue impedance before any injection is made.
Information from the electrode patch is gathered and processed in order to calculate tissue impedance.
During these injections, a substantial change in tissue impedance occurred almost instantaneously.
Current levels are affected by resistance levels, and consequently by tissue impedance.
Thus, the tissue impedance can be calculated from the ratio of voltage to current.
Because of the potentially large tool contact area tissue impedance is very low.
In some cases, tissue impedance may display a sudden impedance increase indicating successful coagulation.
Because of the potentially large tool contact área tissue impedance is very low.
Specifically, tissue conductance and tissue impedance are related by the following equation, EPMATHMARKEREP.
The signal A is representative of the desired tissue impedance.
As ablation proceeds, the tissue impedance rises and the RF energy becomes less effective.
The transformer transmits a voltage signal proportional to the tissue impedance between the electrodes.
Tissue impedance is monitored at the operating frequency of the sine wave oscillator 104.
However, it may not be necessary for the tissue impedance to be monitored.
A tissue impedance measurement circuit ( 15 ) coupled to said controller for measuring impedance of the tissue ;.
Figure 4 shows the results of a different way of modelling of tissue impedance characteristics ;.
In step 220, the tissue impedance is determined using the monitored output voltage and output current.
Electrosurgical power delivered is a function of applied voltage, current and tissue impedance.
The interrogatory pulse is used to sense initial tissue impedance vÃa the sensor circuitry 11.
The electrosurgical device of claim 40 wherein the tissue characteristic is the tissue impedance.
The digital result is the tissue impedance ( in ohms ) for the sample.
More specifically, conductivity of the tissue increases, so that tissue impedance decreases.
Fig . 6 illustrates a tissue impedance feedback circuit of the trocar assembly illustrated in Fig . 7.
At this lower output power, desiccation stops and the tissue impedance starts to fall.
FIGS . 2 is a schematic diagram of tissue impedance versus temperature observed from applicants ' research.
The method includes the steps of determining a pre-injection of baseline measurement for tissue impedance.
Accordingly, the practitioner can determine through monitoring the tissue impedance when sufficient ablation has occurred.
Preferably, apparatus 10 includes a display 80 on the generator 12 that shows the user the sampled tissue impedance.
Specifically, the controller 24 continually receives a current average tissue impedance value ZAVEn from the sensor module 22.
In particular, sensor circuitry 22 is adapted to measure tissue impedance.
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