Site~Rite* IV Ultrasound System Operator’s Manual
Chapter 5: Site~Rite* IV Probes
How the Probes Work
At the top of each probe is a translucent probe cap, and within the cap is an oscillating transducer. A
proprietary fluid surrounds the transducer and fills the cap. While the transducer oscillates an ultra-
sound beam is emitted that is moved back and forth, creating a wedge-shaped image. At the end of the
cap is the acoustic window, through which the ultrasound beam is directed.
The distance between the transducer and the acoustic window defines the shape of the scan plane. The
transducer in the standoff probe is located farther from the acoustic window, so the image produced is a
truncated sector scan, trapezoidal in shape.
Ultrasound penetrates through fluid and soft tissue, but not through air or bone. Because ultrasound
cannot penetrate through air, there must always be a fluid medium between the probe head and the
patient’s skin to conduct the beam into the patient.
5.2 Handling the Probes
Site~Rite IV Probes are precision instruments and must be handled carefully.
•
To hold the probe properly, grasp the probe by the black plastic handle.
•
Do not hold the probe by the gray probe cap. The cap is made of a flexible material, and pressing
on the sides of the probe cap may restrict the movement of the transducer or damage the probe.
•
The probes should never be subjected to heavy vibration or dropped. This may damage the
probes or cause misalignment.
•
Do not use the probe or the probe cord to move the Site~Rite IV Scanner. Excessive
bending or twisting of the probe cord may cause the probe to work intermittently or to fail
completely.
5.3 Working with the Site~Rite
*
IV Probes
Orientation
Standoff Probe (red and blue cable bend relief )
When using a 7.5 MHz probe (red cable bend relief) or 9.0 MHz probe (blue cable bend relief), hold
the probe so that the side with the needle guide hook points away from the heart.
Caution:
Check the alignment of the 7.5 MHz and 9.0 MHz standoff probes once a month, or
after a probe has experienced any mechanical impact. Do not use a misaligned probe for
needle guidance. For the alignment test, see Chapter 5.5,
Periodic Probe Testing
.
Warning:
If a probe is damaged in any way, discontinue use immediately.
Draping the Probe for Sterile Use
When using Site~Rite IV probe in a sterile environment, the probe and part of the probe cable must be
covered with a sterile, acoustically transparent plastic sheath.
Caution:
Some commercially available probe covers contain latex. Natural rubber latex may cause
allergic reactions. On March 29, 1991, the U.S. FDA issued an alert titled: "Medical
Alert: Allergic Reactions to Latex-Containing Medical Devices."Bard Access Systems,
Dymax Corporation distributed sterile kits do not contain latex.
To drape the probe for sterile use,
1.
Place the probe in the side arm probe holder on the roll stand.
2.
Apply a layer of non-sterile ultrasonic coupling gel on the acoustic window of the probe head.
3.
Make sure that the sheath is fully rolled up.
4.
Place the sheath over the probe head, being careful not to wipe off the coupling gel.
5.
Cover the probe and cable with the sheath.
6.
Smooth the sheath over the acoustic window of the probe head to remove any air bubbles or
folds in the sheath.
7.
Use the poly-bands to hold the sheath in place.
8.
Apply a layer of sterile coupling gel to the sheathed acoustic window. Sterile gel is included in
the Site-Rite IV Sterile Kit.
Warning:
When using Site~Rite Needle Guides on the fluid standoff probes, use only sterile plastic
sheaths that are 1 mil (0.001 inch or 0.0254 mm) thick.
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