Sherlock 3CG™ Tip Confirmation System
Page 27
ECG Troubleshooting
Flat-line ECG signal
Cause
: No fin connection.
Solution
: Fully seat fin on the sensor.
Cause
: No ECG electrode connection.
Solution
: Ensure that the area on the skin where
the ECG electrodes were placed is oil free and
completely dry.
Cause
: Damaged ECG electrodes.
Solution
: Ensure catheter T-lock connections are
fully seated. Replace electrodes.
Cause
: Air bubble at the catheter tip.
Solution
: Flush the catheter lumen containing
the stylet with saline.
Cause
: No stylet-to-fin connection.
Solution
: Fully seat the stylet connector on the
fin. Refer to the Bard Access Systems’ catheter
instructions for use.
Poor ECG signal
Cause
: Fin and/or stylet connectors not fully
seated.
Solution
: Fully seat fin on sensor. Fully seat
stylet connector on fin.
Cause
: Poor ECG electrode contact.
Solution
: Ensure that the area on the skin where
the ECG electrodes were placed is oil free and
completely dry.
Cause
: Patient movement.
Solution
: Ask the patient to remain still. Ensure
the patient is warm and relaxed.
Cause
: Extraneous noise.
Solution
: Avoid touching the stylet or
electrodes.
Cause
: Damaged ECG electrodes.
Solution
: Replace electrodes.
Cause
: Catheter not locked with saline.
Solution
: Ensure catheter T-lock connections are
fully seated. Flush the catheter lumen
containing the stylet with saline.
Cause
: The External ECG signal, with black
electrode on the patient’s left shoulder (Lead III
view) is weak.
Solution
: Place black electrode on the patient’s
right shoulder (Lead II view).