baxter AK 98, Training Material

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SINGLE NEEDLE | Terminology
In single needle the patient’s blood is removed from, and returned to, the single access point in a
cycle with two phases;
• The Arterial phase. The venous blood line is clamped, and blood is withdrawn from the patient
into the arterial blood line. The pressure and volume in the circuit increases.
• The Venous phase. The arterial blood line is clamped, and the blood that entered in the arterial
phase is returned to the patient via pressure and gravity.
Single needle parameters;
• Mean blood flow. Is the effective mean blood flow rate during the complete cycle.
• Stroke volume. Is the blood volume which passes through the dialyzer during a cycle. The
higher the stroke volume the more efficient the treatment.
HC10139 |