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During pressure/compression, the probe is pressed or pushed into the body, causing compression of body tissues. The pressure/compression maneuver may help to reduce contact and air‐trapping artifact, push structures out of the way, such as gas‐filled small intestine, and gain more depth by moving the transducer closer to the area of interest. Uncontrolled pressure may result in moving the intended target (area of interest) out of the field of view. This effect commonly occurs with the feline spleen and kidney and at the AFAST spleno‐renal (SR) view.

Figure 4.10. Sweeping. The probe is moved across the body in the transverse axis of the patient, and the angle of insonation in relation to the patient’s body is not changed.

Source: Illustration courtesy of Randi Taggart, Richmond, VA.

Figure 4.11. Pressure/Compression. Neither the probe position on the body nor its angle of insonation is changed. Rather, the probe is pushed into the body, compressing the underlying tissues.

Source: Illustration courtesy of Randi Taggart, Richmond, VA.