Table 2.

Theoretical percent error of different recording systems.

Variable	$R_{{\text{V}}_{\text{r}}}(\text{Ω})$	$R_{\text{e}1}+R_{\text{e}2}(\text{Ω})$	$R_{\text{bs}}(\text{Ω})$	err 1	err 2	err total
Tissue/channel resistance $R_{\text{bs}}$	107	105	102	−0.001%	−0.990%	−0.991%
Tissue/channel resistance $R_{\text{bs}}$	107	105	105	−0.980%	−0.990%	−0.991%
Tissue/channel resistance $R_{\text{bs}}$	107	105	108	−90.8%	−0.990%	−91.8%
Electrode resistance $R_{\text{e}1}+R_{\text{e}2}$	107	102	102	−0.001%	−0.001%	−0.002%
Electrode resistance $R_{\text{e}1}+R_{\text{e}2}$	107	105	102	−0.001%	−0.990%	−0.991%
Electrode resistance $R_{\text{e}1}+R_{\text{e}2}$	107	108	102	−10−4%	−90.9%	−90.9%
Voltmeter resistance $R_{{\text{V}}_{\text{r}}}$	104	105	102	−0.091%	−90.9%	−91.0%
Voltmeter resistance $R_{{\text{V}}_{\text{r}}}$	107	105	102	−0.001%	−0.990%	−0.991%
Voltmeter resistance $R_{{\text{V}}_{\text{r}}}$	109	105	102	−10−6%	−0.001%	−0.001%
n/a (this work)	107	1.4 × 105	7.4 × 102	−1.39%	−0.007%	−1.38%

The first error is due to too much current rerouted into the recording system. $er{r}_1=\frac{R_{\text{bs}}}{R_{\text{bs}}+R_{\text{e}1}+R_{\text{e}2}+R_{{\text{V}}_{\text{r}}}}$.

The second error is due to significant voltage drop across the recording electrodes instead of voltmeter. $er{r}_2=\frac{R_{\text{e}1}+R_{\text{e}2}}{\left(R_{\text{e}1}+R_{\text{e}2}\right)R_{{\text{V}}_{\text{r}}}}$.

$er{r}_{\text{total}}=er{r}_1+er{r}_2$.

Polarizable electrodes result in additional electrochemical reactions at the interface and is therefore excluded from this estimation.