Written by Ron Sterling, M.D. and Published in Northwest Prime Time Magazine
by Ron Sterling, M.D. -- April 2006
I was finally able to get enough time off from work to travel to where she lives and make sure she made it to doctor appointments and followed-up. It took almost a month of work, but I found out she had a mostly curable problem that was not just related to old age. She had normal pressure hydrocephalus (NPH). I was shocked. I had never heard of such a thing. After a lot of tests, the doctors put a shunt in to fix the problem and her forgetfulness, unsteadiness and incontinence almost completely disappeared. Could you please spread the word about NPH and its treatment? -- Signed: Concerned About Others.
NPH is felt to be greatly underdiagnosed. Since the symptoms of NPH do not show up all at the same time, it can be difficult to diagnose. Often, each symptom is investigated independently as they show up and the whole picture does not get put together until later. Often, walking problems and incontinence are seen as normal aging problems and family members may not get appropriately concerned. In addition, the diagnosis has only been made since 1965. NPH occurs equally in both males and females and almost always after age 60.
However, the major diagnostic symptoms of NPH are clear-cut and easy to remember -- (1) gait disturbance (a change in walking or standing); (2) urinary incontinence (or urgency and frequency); and, (3) dementia. More often than not, the symptoms show up in that order in the course of the disease. The disorder might be better named "GUD" Triad.
In fact, the name NPH is misleading because it is highly likely that in the course of the disease there is an early or recurring period of time when the cerebrospinal fluid (CSF) pressure is much higher than normal before it returns to normal. The symptoms of NPH are caused by the "crushing" of brain tissue due to the expansion of pools of CSF (ventricles) inside the brain. The entire brain and spinal cord system are bathed by the CSF which protects them. Deep inside the brain, there are several pools of CSF. If, for some reason, the CSF cannot circulate out of the ventricles, they will expand and crush brain tissue. Once the ventricles expand to accommodate the increased fluid, the pressure goes back to normal.
NPH cannot always be treated. When it can be treated, the treatment consists of implanting a shunt in the brain that drains excess CSF into the abdominal cavity. Your mother's experience of showing remarkable improvement after a shunt was surgically installed happens for about 60% of patients who are treated. The percentage of improvement is greater if certain criteria are met before a shunt is installed.
I hope this helps. Since this is a complex subject, I recommend viewing some of sites that are listed below. -- Best wishes, Dr. Ron.
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RON STERLING, M.D.
General Psychiatry with Specialization in Adult Attention Deficit Disorder
Updated October 7, 2007
Copyright 2000-2007. Ron Sterling, M.D. All Rights Reserved.
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