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EKG BLANKER
(Model: SB-1 - With power adapter)
Unique instrument for reducing the cardiac artifact in respiratory muscle recordings

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The SB-1 EKG Blanker is a unique instrument for reducing the cardiac artifact in respiratory muscle recordings, especially the diaphragm EMG. Its many advanced features make it easy to set up and operate.

The instrument accepts an amplified EMG signal as its input and, optionally, an amplified EKG signal. Outputs include a standardized-amplitude version of the input signal (amp out), a processed and full-wave rectified signal (out), and a sync out logic signal corresponding to the EKG R-wave.

The artifact reduction technique employs a time delay circuit whereby the signal is digitized and delayed out of real time by a short period (approximately 50mS). The internal software triggers from the embedded artifact in the real-time signal (or from the external EKG input), and predictively processes the delayed signal.

Setting up the instrument is straightforward. In auto setup mode, the signal gains are automatically standardized, and the blanking process optimized. The various blanking parameters can also be manually set if desired. Heart rate and respiratory rate are computed and displayed on the LCD. An audible EKG beep can be turned on or off as desired.

The rectified output of the SB-1 is generally fed to a Moving Averager, which produces a smoothed envelope around the EMG activity.

Although designed for human diaphragm EMG processing, the wide measurement range of the SB-1 makes it suitable for use with other muscles and a variety of experimental animals.


SB-1 tracing showing blanking
Sample SB-1 tracing with simulated diaphragm EMG.
Top: amplified raw signal
Middle: rectified raw signal
Bottom: blanked output signal
(norm mode at right, null mode at left)
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Input range (EMG or EKG) + 10V P-P
Heart rate measurement range 10 - 300 bpm
Respiratory rate measurement range 4 - 100 breath/min
Measurement resolution (HR or RR) + 1 bpm
AMP OUT range (bipolar) + 1.5 V P-P (nominal)
OUT range (full-wave rectified) 0 - 1.5 V P-P (nominal)
DELAY TIME range 50 - 150 mS
BLANK TIME range 50 - 150 mS
SYNC OUT TTL positive
Input / output connectors BNC jack
Power requirements + 5 V @ 100 mA
Dimensions 9.3 W x 2.5 H x 8.0 D inches (23.6 x 6.4 x 20.3 cm)

Model:
SB-1
EKG Blanker
With power adapter Contact us
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Bioseb - In Vivo Research Instruments
Phone worldwide : +33 442 344 360 - USA/Canada : (727) 521-1808
e-Mail : Worldwide: info@bioseb.com - USA/Canada: info-us@bioseb.com