請問各為學姊在照護EVD病患須注意哪些項目 有何護理措施?謝謝[ 本帖最後由 熾天使之怒 於 2008-12-27 21:30 編輯 ] EVD照護 (學姊 EVD照護 - 趣味新聞網

What is external ventricular drainage (EVD)?
The brain and spinal cord are surrounded by cerebro-spinal fluid (CSF), which helps to protect them from damage. The areas in the brain which contain this fluid are called ventricles. Sometimes CSF needs to be drained away from the ventricles, for reasons which are explained later in this leaflet. External ventricular drainage (EVD) is a temporary method of doing this.

The EVD system uses a catheter (a thin, plastic tube) which is placed in the ventricle of the brain. This is connected to a drainage system (see diagram).

The drainage system works by using gravity. This means the amount of CSF that can drain away depends on the position of the drip chamber or cylinder beneath the ventricles.

A lumbar drain works in exactly the same way and is used particularly after spinal surgery. It diverts fluid away from the operation site, which allows the wound to heal without the risk of CSF leaking out.

Why does my child need EVD?
There are many reasons for using EVD. These include:

reducing the pressure inside the brain caused by a build-up of CSF. This can result from a temporary blockage or abnormal flow of CSF within the brain

diverting infected CSF from the brain and giving antibiotics directly into the CSF to remove the infection

draining excess fluid and/or blood if a child has had brain surgery or has experienced a bleed into his or her brain.

How is the drain inserted?
The drain will be inserted in an operation under general anaesthetic, lasting between one and two hours. The surgeon will feed the drainage tube under your child’s skin to the exit site. This can be on your child’s head, neck or tummy. Where possible, the surgeon will discuss the exit site with you before the operation.

Before the operation, the surgeon will visit you to explain the operation in more detail, discuss any worries you may have and ask you to sign a consent form giving permission for your child to have the operation. If your child has any medical problems, like allergies, please tell the doctors about these.

What are the risks?
Every anaesthetic carries a risk of complications but this is very small. Your child’s anaesthetist is an experienced doctor who is trained to deal with any complications. Any surgery carries a small risk of infection or bleeding.

There is a risk of infection with EVD but this will be minimised by using gloves and sterile equipment whenever a nurse or doctor has to touch the system..

What happens afterwards?
Your child will return to the ward to recover from the anaesthetic. He or she will have a light dressing where the catheter was inserted, and another light dressing on the exit site. The nurses will set up the drainage system and explain in detail how it works. Please do not try to set it up yourself.

While your child is having EVD, the nurses will be monitoring him or her closely. They will need to take regular measurements of the amount of CSF draining away and record this in your child’s medical notes. If too much CSF drains away, your child will become pale and clammy, may vomit and could become sleepy.

If your child starts to cry, this can increase pressure in the head and you must clamp the tube immediately to prevent too much CSF draining away. You should also clamp the tube immediately if your child changes position - for instance, if he or she sits or stands up or lies down.

Once you have clamped the tube, please call the nurse so that he or she can reposition the drain.

The tubing can easily become disconnected, which would allow the CSF to drain away at too fast a rate. This is less likely to happen if the tube and drainage system are out of your child’s reach at all times.

If the tubing becomes disconnected, please call a nurse immediately. If the doctors suspect that your child has an infection, they may ask for samples of CSF to send for testing in the laboratories. Samples are taken through the port on the tubing. They will also use the port to give your child medications into the CSF.

The nurses on the ward will encourage you to look after your child as much as you feel able. This can be daunting, especially while he or she is connected to the drainage system, but it will become easier with time. If you are worried, please talk to the nurses.

How long will the EVD last?
This varies from child to child, depending on the reason why EVD was needed in the first place. However, it is a temporary method of draining CSF and is rarely used for more than ten days. Your child will need to stay in hospital until the drainage system is removed. If your child needs ventricular drainage for a longer period of time, another method may be suggested. The doctors will explain this in more detail if it is likely.

How is the EVD removed?
The catheter in the ventricle is removed in an operation under general anaesthetic, lasting one to two hours. The drainage bag and long tube are clamped and removed on the ward before the operation. Both the operation site and the exit site will be covered in a light dressing for the first few days after the operation.

Are there any long-term effects of having EVD?
There are no long-term effects of having EVD, other than a small scar where the catheter was inserted and another small scar at the exit site. These will fade in time.

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