The COstatus^® system identifies intra-cardiac shunts and/or a patent ductus arteriosus (PDA) from the shape of the dilution curve show in the figures below and displayed on the COstatus^® monitor. In order to identify shunts, COstatus^® analyzes the indicator’s time of appearance and the width and symmetry of the dilution curve.

Fig. 1: Characteristics of dilution curve used for shunt identification.

COstatus^® distinguishes the following clinical conditions:

1. Possible Left-to-Right shunt with Qp/Qs value display (Fig.2)
2. Possible Bidirectional shunt with or without Qp/Qs value display (Fig. 3)
3. Possible Right-to-Left shunt with or without Qp/Qs value display (Fig. 4)

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Fig. 2: Possible Left-to-Right Shunt screen with Qp/Qs values displayed.

Fig. 3: Possible Bi-directional Shunt screen with Qp/Qs values displayed.

Fig. 4: Possible Right-to-Left Shunt screen with Qp/Qs values displayed.

Shunt References:

Novel ultrasound dilution technique detects left-to-right shunts with high accuracy in children. (CO-8041V)

Cardiac output measurement is feasible in the presence of left-to-right shunt with ultrasound dilution method. (CO-8062)

Accuracy and precision of a new method for hemodynamic assessment in children undergoing cardiac surgery based on ultrasound dilution methodology. (CO-8043V)

Can ultrasound dilution identify and qualify the type of shunt in neonate with patent ductus arteriosus. (CO-8026A)