Nurses may prime and connect the intraventricular drainage system in CCTC. All CSF draining catheters (intraventricular; lumbar ICP) must be connected to the CodmanTM External Drainage System for safety.
This procedure refers to the measurement of intracranial pressure through an external ventricular drainage catheter (EVD) using a standard fluid filled pressure transducer.
2. Single pressure transducer circuit primed with normal saline and connected to the patient stopcock stopcock closest to patient catheter (as per setup of drainage system)
3. Transducer pressure cable connected to bedside monitor and "ICP" selected as presure monitoring mode. If ICP is greater than 20 mmHg, the scale will need to be increased.
4. "0" reference on Codman(TM) drainage unit panel has been leveled using a laser level (in CN cupboard)
Tape the transdcuer to the back of the Codman(TM) drainage unit.
Position the transducer so that the stopcock that is located above the transducer is level with the "0" marking on the Codman(TM) drainage collection panel.
Note that drainage of CSF when the pressure in the cranial comparment exceeds the level (in cmH20) of the drainage collecting chamber. The catheter must also be patent and there must be CSF in the ventricle for drainage to occur.
The bedside monitor will display the ICP in mmHg. Note on the Codman(TM) drainage panel equivalent pressures in cmH20 and mmHg.
For example, if the drain is set to a level of 10 cmH20, a drainage gradient occurs if the pressure in the head is greater than 10 cmH20 or 7.4 mmHg (equivalent bedside pressure).
Turn laser level on while positioned in laser holder on Codman(TM) drainage collection system. Adjust panel until the laser beam is directed into external auditory canal.
Taping the transducer into position will ensure that leveling of both the drainage collecting unit and pressure monitoring system can be accomplished each time the Codman(TM) drainage unit is re-leveled.
Leveling the drainage chamber ensures that CSF drainage will occur according to the prescribed pressure.
Leveling the transducer ensures accuracy of the displayed pressure on the bedside monitor.
Perform hand hygiene
Ensure stopcock located above transducer is level with "0" on Codman(TM) panel
Remove the luer lock cap on the stopcock
Turn the stopcock "off" toward the patient monitoring tubing (hard non-compliant tubing)
Press "zero" on the bedside pressure monitoring module
Confirm that the pressure waveform displayed is resting on the "zero" line of the pressure display
Turn stopcock back to monitoring position
Replace cap with non-vented luer lock cap
Reconfirm level with each pressure measurement
Created: November 1988