Parks 915-BL, Руководство по эксплуатации и обслуживанию

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Parks Medical Electronics, Inc.
Aloha, Oregon U.S.A.
Operating Instructions
Setting Up the Instrument
Place the instrument near the patient to be tested. 1.
▪ The instrument should not be placed near devices which may cause radio interference.
The instrument should not come into contact with metal surfaces or other electronic devices.
▪
Plug the desired probe into the correct MHz jacks; the probe cable connectors can plug into either 2.
jack of the same frequency. The probe frequency is identi fi ed on the panel and on the probe label.
Remove the 3. red protective cover from the probe tip prior to use.
Using the Coupling Gel
The probes require a conductive medium to maintain an interface between the skin and the probe for
signal transmission. Use
only
a coupling gel made for ultrasonic applications.
Using the Probe
Parks’ pencil probes are positioned differently than other Doppler probes because they are designed to
detect blood
fl ow in vessels that are too deep to feel. The main energy of the beam is only as wide as the
crystals in the probe, so you must always search the area of the vessel and tilt the probe to obtain best
Doppler sounds. Parks recommends that you practice searching for arteries at the ankle
1. Inspect the probe for cleanliness and damage prior to each use (See Electrical Safety).
Invert the 2. gel squeeze bottle and shake it downward to get the gel near the bottle opening.
Squeeze about ¼ inch of gel onto the tip of the probe or skin surface, making sure there are no 3. air
bubbles.
Turn the volume control all the way down (counterclockwise).
4.
Turn the instrument on, setting the control knob to the frequency of the probe. 5.
For normal operation, turn the cautery suppressor off. 6.
7. Gradually turn up the volume (clockwise).
A rumbling sound can be caused by the vibration of the gel from operator movement.
Positioning the Pencil Probe*
Place the pencil probe over the approximate position of the target vessel. 1.
Align the probe’s crystals parallel to the vessel for best artery-vein ▪
separation.
Tilt the back of the pencil probe to an angle about 15 degrees from 2.
perpendicular, making certain there is gel in the pathway between the
probe and the skin.
Move the probe and the skin to try to
fi nd the center 3.
of the vessel.
Search for the most “pulsating” sound by adjusting ▪
the angle and direction of the probe on the skin.
The Doppler sound for an artery is a hissing noise ▪
at systole.
Background sounds are more or less continuous. ▪
If you do not hear any sounds, move probe to a ▪
different location.
Note that too much pressure on the skin can ▪
occlude a vein, less likely an artery.
Probe crystals
Blood vessel gel
*See Diagnostic Procedures section for placement of precordial probe and fl at probe.
Probe
Gel
Skin Line
Listen for best signal
Flow Direction Blood Vessel