UFi RESP1 User manual

RESP1 IMPEDANCE
PNEUMOGRAPH
UFI
545 Main Street, Suite C-2
Morro Bay, CA 93442
2
Introduction
Use the RESP1 to monitor the larger trans-thoracic and
trans-abdominal impedance changes that result from
respiration. Merely placing two electrodes across the area
of interest allows the RESP1 to monitor respiration not only
in humans, but also in a wide variety of animals.
The RESP1 induces a small and safe high-frequency
(30KHz) current to flow between the electrodes, and then
senses the resulting voltage across the same electrodes.
No balancing is required; the RESP1 output signal always
returns to the zero baseline.
The Model 1130 Pneumotrace Respiration Transducer may
be used instead of electrodes with the RESP1.
Controls and connectors

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Power switch
•In center OFF position, RESP1 is powered down.
•Set to ON position for normal operation.
•Set to TEST to check battery: Battery is OK if
meter needle is above "B/OK" line. Otherwise,
replace battery.
Meter
•In normal operation, meter needle moves with
each inspiration and expiration.
Size control
•Adjusts amplitude of signal to meter and to
downstream recorder or plotting software.
Input connectors
•The standard RESP1 features two 0.060" safety
jacks, black and red, that accept standard EEG
and EKG electrode leads.
•The RESP1/EF and RESP1/EKG variants have an
additional, green jack for an EKG reference lead.
Output connectors
•The standard RESP1 has one back-panel BNC
receptacle that supplies the respiration output
signal to downstream equipment.
•The RESP1/EF and RESP1/EKG variants have an
additional BNC receptacle to supply the EKG
output to downstream equipment.
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Electrode considerations
To improve recording quality,
•place electrodes at level of maximum change in
chest diameter, usually along the mid-axillary lines
(left and right) at about the V5 or V6 level;
•if signal is still weak, connect several electrodes
together in parallel to increase effective size.
•If RESP1 signal is too strong for recording device,
you will need to attenuate RESP1 output. Contact
UFI for a simple resistive circuit that you can use
to decrease signal.
Using the standard RESP1
To measure respiration with EEG or EKG electrodes:
•Lightly abrade skin at the selected locations, then
attach electrodes.
•Connect electrodes to front-panel safety jacks.
•Move power switch to TEST position. Battery is
OK if meter needle is above "B/OK" line (7 volts).
Otherwise, replace battery.
•Move power switch to ON position. Meter will
swing off scale, then return to center (zero)
position in about 30 seconds.
•Meter now indicates respiration; needle deflection
magnitude reflects respiration depth.
•Attach recorder or other downstream device to
respiration output connector.
•Output signal level ranges from 100 mV to 5 volts;
adjust with size control.

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To measure respiration with Model 1132 transducer:
•Plug Model 1132 PneumoTrace® into front-panel
safety jacks (instead of electrodes as above);
•Wrap Pneumotrace® around subject at level of
maximum respiratory motion.
•Ask subject to take a deep breath and hold it.
•Fasten one side of Pneumotrace® to end of
VELCRO strap, pull taut around subject, then
fasten other strap end to other side of
Pneumotrace®.
•Subject may now resume normal breathing;
RESP1 operates as described for EEG or EKG
electrodes.
Using the RESP1/EF or RESP1/EKG
Two variants of the RESP1 can output both respiration and
non-clinical ECG signals:
•The RESP1/EF separates the ECG signal from
the respiration signal with a filter but does not
amplify the ECG output.
•The RESP1/EKG adds an ECG amplifier after the
filter to yield an ECG of 1V output per 1 mV input;
this variant has a serial number labeled "ECG."
•With either variant, if the ECG signal is upside
down, correct by moving the electrode lead from
the red jack to the black jack and vice versa.
•The RESP1/EF need not be powered ON to
output EKG; however, the RESP1/EKG must be
ON to output EKG.
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•Electrode contact resistance must be under
10,000 ohms for good ECG results; higher
resistance causes 50/60 Hz noise.
•To reduce noise, place a third, reference electrode
on subject; plug lead into green safety jack on
front panel.
•You can also reduce electrode noise problems by
gently abrading sites before attaching electrodes.

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RESP I specifications
•Impedance range 1 to 2000 ohms
•Respiration output level 1 to 5 volts
•Excitation 30 kHz sine wave,
constant current
•Power supply Standard 9V alkaline
battery, Duracell
MN1604 or equivalent
•Size 6.8"W x 2.5"H x 4.8"D
(17.1 x 6.4 x12.1 cm)
•Weight 16 ounces (450g)
Additional RESP1/EF specification
•EKG output level 1 mV
Additional RESP1/EKG specification
•EKG output level 1 V out per mV ECG in
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Warranty and repair
All UFI instruments are warranted against defects in materials
and workmanship to the original purchaser for a period of one
year from the date of original purchase. This warranty is void if
our inspection shows the equipment has been tampered with; or
installed at variance with factory-designated procedures; or has
been subjected to negligence, misuse, or accident beyond normal
usage; or has had the serial number altered, defaced, or removed.
All questions regarding the warranty should be directed to:
Customer Service Department
UFI
545 Main Street, Suite C-2
Morro Bay, CA 93442
Email: [email protected]
No third party, including any dealer or agent, is authorized to
assume any liability for UFI.
When corresponding or communicating with UFI concerning
your equipment, please include the model and serial numbers.