Medical Tests That Can Save Your Life: 21 Tests Your Doctor Won't Order ...Unless You Know to Ask

Medical Tests That Can Save Your Life: 21 Tests Your Doctor Won't Order ...Unless You Know to Ask

by David Sandmire, David Johnson, Daniel Klein
     
 

You may be at high risk for a deadly disease without knowing it. And in this case, what you don't know can kill you. This important book can help save your life. For the first time, two doctors inform us about lifesaving medical tests that can diagnose deadly diseases--including various cancers, heart disease, aneurysm, and stroke--at their earliest stages when…  See more details below

Overview

You may be at high risk for a deadly disease without knowing it. And in this case, what you don't know can kill you. This important book can help save your life. For the first time, two doctors inform us about lifesaving medical tests that can diagnose deadly diseases--including various cancers, heart disease, aneurysm, and stroke--at their earliest stages when they're most likely to respond to treatment. Some of these tests are so new that your doctor may not know they exist!

This book will help you construct your Personal Risk Profile-based on your age, gender, ethnicity, family medical history, and environmental hazards. You'll then use this profile to determine exactly which medical tests to take-and you'll learn how taking these tests can rescue you from an avoidable, premature death.

Dedicated to improving the quality of care available to all patients, Drs. Johnson and Sandmire guide you through each of these tests, explaining the process, cost, reliability, and potential health risks in language that you can understand. They also offer strategies for persuading your doctor to order the tests and convincing your insurance company to foot the bill. And if your insurer won't pay, they'll let you know where to go to get the tests for a reasonable price.

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Product Details

ISBN-13:
9781579547325
Publisher:
Rodale Press, Inc.
Publication date:
06/23/2004
Edition description:
REV
Pages:
224
Product dimensions:
6.58(w) x 8.76(h) x 0.74(d)

Read an Excerpt

PSA Tests For Prostate Cancer

Prostate specific antigen (PSA) was discovered in 1979. It is a protein produced by the cells that line the inside of the prostate. Prostate cancer changes the cellular barriers that normally keep PSA within the ductal system of the prostate, causing PSA to be released into the blood in higher quantities. All of the tests below consist of a simple blood draw and a laboratory analysis.

The total PSA test measures the total amount of PSA in your blood. The results are given in ng/ml (nanograms of PSA per milliliter blood), and a total PSA of 4 ng/ml or higher is considered to be a possible sign of prostate cancer. The risk increases as this number goes higher.

The total PSA and DRE (digital rectal examination) are generally the first line of tests done for detecting prostate cancer. If a suspicious finding occurs in either of these tests, your doctor will probably order follow-up tests, like a percent-free PSA test or transrectal prostate ultrasound, to determine if you should have a prostate biopsy.

The PSA velocity test is a measurement of the total PSA level over a period of time. Total PSA velocity should be determined over 24 months by measuring the total PSA on at least three separate occasions, spaced as equally apart as possible -- ideally, every 8 months. A rise in total PSA of over 0.75 ng/ml per year over this time is suggestive of prostate cancer and may warrant having a prostate biopsy.

The total PSA that is measured in the blood exists in two major forms -- PSA that circulates bound to proteins (the more abundant form) and PSA that circulates "free" in the blood (not bound to proteins). The percent-free PSA test, by measuring only that amount of the total PSA that is in the free form, enhances the overall reliability of the PSA test, because men with prostate cancer tend to have a lower percentage of PSA in the free form than men without prostate cancer.

The percent-free PSA test is mainly used as a follow-up test in men who are found to have a total PSA level in the so-called "gray area" -- between 4 ng/ml and 9.9 ng/ml -- to help determine who should undergo a prostate biopsy and who should not. Currently, a prostate biopsy is recommended in these men when their percent-free PSA is less than 10 percent. A biopsy is usually not recommended when their percent-free PSA is greater than 25 percent. If the percent-free PSA is between 10 and 25 percent, the patient's overall risk profile is used to decide how to proceed.

Follow-Up Testing

Once your doctor determines that you have an abnormal digital rectal examination or an abnormal PSA (based on total levels, percent-free PSA, PSA velocity, or a combination), the next step will most likely be a transrectal ultrasound of your prostate.

For the transrectal prostate ultrasound (TPU), a cylinder-shaped ultrasound probe will be gently placed in your rectum as you lie on your left side with your knees bent. The probe is rocked back and forth to obtain images of the entire prostate. The procedure takes about 15 to 25 minutes to perform.

The TPU can display both the smooth-surfaced outer shell of the prostate and the core tissues surrounding the urethra (the tube that comes out of the bladder down through the penis). The doctor will look at the entire volume of your prostate.

If the TPU shows an enlarged prostate, this indicates either inflammation of the prostate (prostatitis) or benign enlargement of the gland. A TPU showing either a distinct lump or an irregular area within the gland suggests cancer. If a lump or irregularity is seen, a biopsy will be taken in order to definitively diagnose cancer.

Reliability

Total PSA Test

The total level of PSA in serum is increased by factors other than cancer. So, like the DRE, total blood PSA alone is neither accurate nor optimally specific for prostate cancer screening. Only 15 to 25 percent of men with an elevated total PSA (greater than 4 ng/dL) are found to actually have prostate cancer. Similarly, up to 30 percent of men who do in fact have prostate cancer have a normal total PSA blood level.

PSA Velocity Test

This test has a reported sensitivity of about 72 percent and a specificity of 95 percent. Remember, sensitivity is the ability to detect the disease when it's truly there. Specificity is the ability to detect the absence of disease when it is truly absent. Therefore, this test is pretty good at detecting prostate cancer when you in fact have it, and it is very good at informing you that you do not have it. However, since this test is done over a 2-year period, it isn't appropriate when a quick diagnosis is necessary.

Health Risks

There are none for the various PSA tests; these are simple needle draws. And there are no serious risks from a TPU without a biopsy. Infection is rare, only occurring as a result of biopsy (if one is done) rather than as a result of the ultrasound itself.

Cost of the Screening Tests

The standard PSA blood test costs between $20 and $60. Some self-testing home kits are available for about $40 from Web sites like TestCountrycom. The free PSA blood test and the PSA velocity test cost about $100 each. Medicare and most health insurers typically cover these tests for men over 50.

Reprinted from: Medical Tests That Can Save Your Life: 21 Tests Your Doctor Won't Order ...Unless You Know to Ask by David Johnson, Ph.D., and David Sandmire, M.D. with Daniel Klein © 2004 by David Johnson, Ph.D. and David Sandmire, M.D. Permission granted by Rodale, Inc., Emmaus, PA 18098. Available wherever books are sold.

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What People are saying about this

James M. Blum
James M. Blum, Ph.D., chief executive officer and manager, Marshall-Blum, Herbal Research Clinic
A great resource for the American healthcare consumer that explains complex medical conditions in understandable language.
Terence K. Gray
Terence K. Gray, D.O., Clinical Fellow, Harvard Medical School
This book tackles many of society's medical issues and transforms them into one easily readable format.
John Caramagna
John Caramagna, D.O., Diplomate -- American Osteopathic Board of Family Physicians
. . . a fresh and welcome guide that will certainly enhance and improve the doctor/patient relationship . . . this book will change . . . lives.
Alan N. Weiner
Alan N. Weiner, D.O., Portland, Maine-based specialist in nutritional and environmental medicine
. . . a literary triumph in preventive medicine . . . an honest assessment of our current healthcare system, and an easy-to-understand self-help manual . . .

Meet the Author

David Johnson, Ph.D., author of Feel 30 for the Next 50 Years, is associate professor at the College of Osteopathic Medicine, University of New England, and adjunct professor at Boston University School of Medicine.

David Sandmire, M.D., is an associate professor in the Department of Biological Sciences at the University of New England, where he teaches neuroscience, anatomy and physiology, and cardiovascular physiology. Both authors live in Kennebunk, Maine.

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