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Doctor insights on: Shunt Pressure

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Does elevation (like sitting, standing, flying) affect vp shunt pressure or the relation between distal and proximater tube (lying flat vs upright)?

Does elevation (like sitting, standing, flying) affect vp shunt pressure or the relation between distal and proximater tube (lying flat vs upright)?

Minimally: The elevation may be a few centimeters of water pressure and unlikely to be significant. The tube usually has adequate length to avoid tension with stretching out with extension of the body. ...Read more

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Shunt (Definition)

Device that allows the flow of usually a fluid between two places. Sometimes a shunt may be used during carotid endarterectomy surgery to maintain the blood flow to the brain while the carotid artery ...Read more


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Is there anyway of telling weather my vp shunt's pressure is high or low?

Is there anyway of telling weather my vp shunt's pressure is high or low?

Hydrocephalus : Discuss the valve type with your neurosurgeon. Some valves are programmable and the pressure can be adjusted with magnets. Some valves are fixed at a certain pressure. X-rays or a shunt programmer can determine the shunt valve pressure. Some programmable valves will change position after an MRI scan or if an IPad II comes with two inches of the valve. ...Read more

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For ppl w/vp shunts, is pressure affected by altitudes/height/elevation or the relation between distal and proximater tube (lying flat vs upright)?

For ppl w/vp shunts, is pressure affected by altitudes/height/elevation or the relation between distal and proximater tube (lying flat vs upright)?

ICP: There is no effect of altitude on intracranial pressure in patients with vps while climbing or flying and no effect with changing of position based on something called auto regulation. Similarly valves in shunts prevent fluid to go back into the cranial cavity. The only things that could affect the pressure are if the flow is to high (low pressure) of if the flow is too low (high pressure). ...Read more

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Is it normal for someone with vp shunt to feel pressure inside head? (sometimes like a pulsing throb for a few seconds when standing up or something)

Yes: Pressure fluctuations during position changes etc are common in shunts. Often, once the shunt has been in for a long time, symptoms may improve. ...Read more

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When i had my shunt flow study test they said they aren't getting much pressure what does this mean?

When i had my shunt flow study test they said they aren't getting much pressure what does this mean?

Low pressure shunt: May mean it is overdraining. Are you getting headaches as you can get headaches( relieved with lying down) from low pressure and even hydrocephalus?.Is it a programable valve? Ask the neurosurgeons if it means the shunt needs to be readjusted or revised. ...Read more

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Why is the codman hakim programmable vp shunt setting range so large? (30 to 200 mmh2o) what do the settings mean, and what's the average pressure?

Easy setting changes: The pressure settings can be viewed as a measure of how much fluid is allowed to drain through the shunt. The lower the pressure setting, the more fluid can drain through the system. A typical setting is between 110-130 but treating hydrocephalus is not always a "one size fits all" for every patient. Some individuals have side effects at certain settings and need a 'different pressure setting'. ...Read more

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If someone w/vp shunt stands on head/bends downwards, is the pressure inside head same as those w/o vp shunt/hydro? Does it get more pressure? Faster?

Pressure: The shunt has a programmed pressure at which the valve will open therefore the pressure will not exceed that valve pressure. Repeated bending and standing may siphon the valve and allow a small excess of flow through the valve giving a headache that resolves when you lay down. Most have some sort of anti-siphon device but this may still occur. ...Read more

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Why does intracardiac right to left shunting occur? Since the left side of heart has higher pressure, how can blood from right side flow through?

Shunt: Good observation....We see right to left shunting when the right sided pressure is higher than the left side and a connection is present between the circulations. This is when pulmonary hypertension is present. There are various causes of pulmonary hypertension including late changes in the lung from left to right shunting. ...Read more

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Vp shunts and sit ups? (does it affect the pressure inside head?)

Vp shunts and sit ups? (does it affect the pressure inside head?)

Don't worry about it: Transient elevation of CSF pressure with straining of doing sit ups but shouldn't be any problem. ...Read more

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Will very bad dementia from normal pressure hydrocephalus improve with a shunt in 68 year old?

Will very bad dementia from normal pressure hydrocephalus improve with a shunt in 68 year old?

NPH: It really depends on how long the hydrocephalus was causing symptoms and whether there are any other medical issues that may be contributing. Dementia and other symptoms from nph is due to pressure on the brain structures from the increased fluid in the ventricles. If the hydrocephalus is treated soon enough, cognitive symptoms from the "squished" tissue may resolve partly or entirely. ...Read more

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