EVD in Subarachnoid Hemorrhage: Device Needs Across the ICU Stay

In aneurysmal subarachnoid hemorrhage, an EVD is commonly placed to treat acute hydrocephalus and may stay in place for days to weeks through the period of delayed complications. Device needs change across that stay: fast, complete kits for emergent placement, reliable daily handling, frequent transport to imaging and procedures, and finally weaning, removal or conversion to a shunt.

Subarachnoid hemorrhage (SAH) patients are among the most resource-intensive in neurocritical care. For distributors, they are also the patients who use the drainage system longest and most intensively, which makes SAH programs a demanding test of an EVD system and of the support behind it. This article follows a typical SAH course and the device questions that arise at each stage.

Why do SAH patients so often need an EVD?

Blood in the subarachnoid space and ventricles can disrupt CSF circulation and absorption, causing acute hydrocephalus. In patients with hydrocephalus and a reduced level of consciousness, CSF diversion with an external ventricular drain is a standard part of management, as reflected in current SAH guidelines. The drain also allows intracranial pressure to be measured, which helps the team manage the patient through the early phase.

Because the aneurysm may not yet be secured when the drain is placed, teams handle early drainage carefully. That clinical caution translates into device expectations: a reliable scale, a clearly readable drip chamber and clamps that are easy to identify.

How do device needs change across the ICU stay?

What does emergent placement require?

SAH patients often arrive through the emergency department, sometimes transferred from another hospital, and the drain may be placed at the bedside or in the OR before or at the time of aneurysm treatment. The kit must be complete and in the right place. The EVD-010 Series is supplied as a configured system with a 31 cm ventricular catheter, a 30 cm measuring scale, a 150 ml drip chamber and an 800 ml drainage bag, in standard or antibiotic-impregnated catheter versions. Stock it in the neuro-ICU and the emergency department, not only in the OR.

Many SAH patients reach a comprehensive stroke center by transfer. Occasionally a drain has already been placed at the referring hospital, and the receiving team inherits a system it may not know. Distributors who cover both the referral hospitals and the receiving center can help by offering the same system across the network, which makes the transfer smoother for nurses on both sides. Where that is not possible, a quick-reference sheet for the receiving unit, showing how the incoming system connects, is a practical courtesy.

Why does drain duration matter in SAH?

Many SAH patients keep their drain through the window in which delayed cerebral ischemia and other complications are most likely, which typically spans the first two weeks after the hemorrhage. Some keep it longer. A longer duration means more days of handling, more transports and more opportunities for the system to be accessed.

This is where catheter choice becomes part of the conversation. Some hospitals use antibiotic-impregnated catheters for patients expected to need prolonged drainage. The ventricular catheter kit offers a radiopaque silicone catheter with tantalum length marks from 5 to 15 cm in a standard version and an orange antibiotic-impregnated version designed to release its agent in a controlled way over 28 days. The selection is the hospital’s; the distributor’s job is to make sure both versions are available where SAH drains are placed.

How does frequent transport affect the system?

During the ICU stay, SAH patients often travel for CT, CT angiography or perfusion imaging, and to the angiography suite for diagnosis or treatment of vasospasm. Each trip involves the transport routine set by the hospital: clamping as ordered, securing the system, re-leveling and reopening on arrival. A system that travels securely and has clearly identified clamps reduces handling errors. Include a transport module in every SAH unit in-service and offer a short session to angiography and imaging staff.

Angiography suites deserve particular attention. Procedures there can be long, the patient lies flat, the room is crowded with equipment and the staff are focused on the vascular procedure. Clear labeling of clamps, a securely mounted drip chamber and a drainage bag that cannot catch on the table all help. A five-minute briefing for the interventional team, agreed with the nurse educator, is a small investment that prevents many problems.

What happens during weaning?

As the patient stabilizes, the team assesses whether the drain can be removed. Weaning protocols differ: some raise the drip chamber gradually, others use a clamping trial with monitoring, and many combine elements. The device must support whichever method the hospital uses, which means a scale with a useful range and clamps that are easy to operate and document. On the EVD-010 Series, the 30 cm measuring scale gives room for gradual height changes; on the EVD-020 Series, the pressure scale serves the same purpose.

What if the patient needs a shunt?

A proportion of SAH patients develop persistent hydrocephalus and need a permanent shunt. That step brings a new set of device decisions: valve type, fixed or adjustable pressure, catheters and accessories. DESU’s range includes the Depus shunts, a polysulfone-valve family with a ruby ball and titanium spring mechanism in low, medium and high fixed pressures and adjustable options, available in VP and LP kits, alongside the silicone Defit and Decurve shunts and ventricular and peritoneal catheter kits.

For a distributor, this means an SAH program is not just an EVD account. The same neurosurgeons who rely on the drain will choose the shunt, and a supplier who supported them well during the ICU stay is in a strong position for that conversation.

How should a distributor support an SAH program?

SAH programs are typically part of comprehensive stroke or neurovascular services, with a dedicated neurocritical care team, interventional neuroradiology and neurosurgery working closely together. That structure means several departments touch the EVD in a single patient’s stay. A distributor who maps those departments, and supports each one with the right stock and the right training, becomes a genuine partner to the program rather than a vendor of one item. Practical steps include:

• Stock complete EVD systems in both catheter versions in the emergency department, neuro-ICU and OR.
• Train nurses on every shift, with emphasis on leveling, drip chamber reading and transport.
• Offer short sessions to angiography and imaging staff who handle SAH patients.
• Plan replacement component supply for prolonged drainage.
• Coordinate drainage and shunt product planning with the neurosurgery team.
• Respond quickly to questions, and route clinical questions to the manufacturer for written answers.

Talk to a DESU product specialist

If you support a neurovascular or SAH program, DESU’s product specialists can help you plan EVD, catheter and shunt assortments and prepare training for your market. Email sales@desu.tr or use the contact page.