been withdrawn from the market recently because of high

production costs.

E. Precautions

1. The fiberoptic sensor may fail as a result of excessive

kinking during sensor insertion into the umbilical

artery catheter.

2. The sensor should be removed slowly to ensure that

there is no microthrombus release if heparinization of

the catheter was suboptimal.

3. See also Chapter 29.

F. Technique

1. Use sterile procedure.

2. Insert umbilical artery catheter (see Chapter 29).

3. Verify catheter position by radiography.

4. Calibrate sensor following the manufacturer’s instructions.

5. Introduce the sensor into the umbilical artery catheter

following the manufacturer’s instructions.

G. Complications

Same as for umbilical artery catheterization; see Chapter 29.

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