Showing posts with label Tests. Show all posts
Showing posts with label Tests. Show all posts

Saturday, 1 April 2017

Tests For New Drugs Are Too Often Rigged To Suit The Market


Today's post from pharmaciststeve.com (see link below) looks at the current drugs debate in North America from a different angle. It asks: just how trustworthy are the testing procedures on new drugs and just how safe are FDA approved (based on those testing procedures) drugs for patients? The answer is not reassuring. Now neuropathy patients know more than most how much research needs to be done on new drugs to treat nerve damage symptoms. They've also been guinea pigs in the search for new and relevant treatments and it's one of those diseases for whom, drugs work for some but not for others. We need to be able to trust the testing procedures and the drug research companies that carry them out and we also need to be able to trust the FDA's final conclusions. This article suggests that neither are rock-solid, so where does that leave us, who are desperate for new drug therapies? Well, it means that we have to be even more pro-active than before and do as much research as is humanly possible ourselves. Thank god for the internet - we can find most of what we need to know there and with advice from our doctors, we can draw our own conclusions. Unfortunately we can't separate politics from health at the moment.

Virtually every pharmaceutical company has been rigging tests for years to make the drugs we take look safer than they really are
Posted on December 27, 2015 by Pharmaciststeve
 

U.S. needs better regulation of drug development

Over the last weeks, we have learned that major companies that make products we trust, like Volkswagen’s diesel engines and Takata’s air bags, have devised ways to rig test results so they look cleaner and safer than they really are. Yet far more widespread manipulation of test results is being done by pharmaceutical companies to get drugs approved by the U.S. Food and Drug Administration that turn out not to be as safe as promised.

In the pharmaceutical industry, virtually every company has been rigging tests for years to make the drugs we take look safer than they really are. Some of the techniques for rigging clinical trials are described in a recent assessment published by BMJ (formerly known as the British Medical Journal). They include drawing random samples for clinical trials from a population that exclude older people, women, and people with multiple health problems who may be more likely to have adverse reactions. The resulting “safety” of the drugs misleads physicians and their patients.

Other techniques include using high doses in shorter trials in order to produce positive results before adverse reactions become evident. Only later do patients learn about them the hard way. FDA regulations also allow companies to run multiple trials (at great expense, used to justify high prices) and handpick the most positive ones while obscuring evidence of toxic reactions.

Worse, unlike regulators for cars, planes, electronic devices, and appliances, who work to detect and stop rigged testing, the FDA division that reviews new drugs has long known about the ways that companies bias trials. This puts patients at serious risk. Based on reviews of hospital clinical charts, independent experts estimate approximately 128,000 patients die each year from adverse responses to properly prescribed drugs. And 2.7 million are hospitalized due to drug reactions. Those estimates do not even include problems related to over-prescribing, errors, and self-prescribing.

Exactly which drugs approved by the FDA’s fast-track process have proved most dangerous to consumers? Given the central importance of drugs in modern medicine, you would think there would be a comprehensive tracking system at the FDA to provide this information by drug. But there isn’t.

In fact, perhaps the most famous such failure is Vioxx, which Merck finally withdrew – following years of obfuscation – after it was estimated to have killed about as many people as the U.S. military lost in the Vietnam War. Note, it was the manufacturer that pulled the drug, not the FDA.

But there are many examples. Worst Pills, Best Pills (www.worstpills.org) is a reputable, subscription-based project of the advocacy group Public Citizen that tracks safety information on nearly 2,000 drugs.

Why does the FDA permit biased company trials for safety and efficacy? Perhaps it has something to do with Congress’ underfunding of the FDA since the antiregulation period under President Ronald Reagan and then having companies fund the division that evaluates their drugs.

These practices subject patients to a double conflict of interest. First, companies test their own drugs for the public regulator, rather than having them tested independently. Then, companies pay the FDA a huge fee – $2.3 million in 2015 – to review each drug. Highly trained and skilled staff work hard to do thorough reviews. But the reviews are on the companies’ terms – their criteria, their trials, their data, their deadlines, their funded patient groups clamoring for approval, and their money.

Reviewers do turn back or turn down drug candidates. Yet 90 percent of the drugs the FDA approves are judged by independent reviewers to provide few or no clinical advantages for patients over existing drugs.

And because these new drugs are inadequately tested, the results are predictable. One in every five new drugs ends up causing enough serious harm to lead the FDA to add the most serious black box warning, or remove the drug from the market – after the harm has been done.

This risk increases to one in three when reviews are accelerated under a special (and legal) process, requiring even higher fees from drugmakers.

Do patients really want faster access to drugs that provide few or no new benefits and have substantial risks of serious harm? Do they want an FDA that largely serves the industry that funds it by approving many new minor variations to increase sales, without good testing for safety?

A few clinically superior drugs are developed each year. But accelerated reviews and low, loose FDA criteria encourage companies to develop more minor variations that will get through the approval process, rather than focus on major advances. To encourage more superior drugs, the FDA needs to require tests for real clinical advances compared to risks of harm.

We need a congressional investigation, with subpoena power, to investigate how the FDA allows manipulations of true randomized trials that understate risks of harm. We need to end a third conflict of interest that endangers patients: The same FDA group that approves drugs as “safe” is responsible for investigating evidence of harm. Only 10 percent of FDA staff are assigned to drug safety. We need an independent, well-funded watchdog for patient safety.

Most important, as a public agency charged with protecting people from unsafe drugs, the FDA needs to be funded entirely by taxpayers. Drugs are now the fourth leading cause of death in America, tied with stroke. The FDA needs to stop contributing to this problem and help reduce the number of patients exposed to risks of serious harm.

Donald Light is a widely published expert on drug policy and a professor of comparative health policy at Rowan University
 

 http://www.pharmaciststeve.com/?p=13009

Thursday, 26 January 2017

Tests and Diagnosis of sciatica


PHYSICAL EXAMINATION

Tenderness
Mid reason for line joining the PSIS & Ischial tuberosity.
Half way between your GT & Ischial tuberosity
Along the back of thigh

Nerve stretch tests
Used to detect nerve root irritation, usually as a result of prolapsed lumbar disc

Straight Leg Raising
Lie the individual on their back with knee extended
Elevate the lower limb (Normal 80-90degrees of flexion isusually possible)
Repeat and match up against other leg
A positive test would show pain within the sciatic nerve between 60-70 degrees flexion
(Felt in the posterior surface of the buttocks towards the foot)
Sensitivity of 91%
Specificity of 26%

Lasègue’s test
•Lasègue’s test is performed whenthe leg is elevate using the knee relaxed
Flexion from the knee
would hence stretch
the Sciatic nerve and
if pain exists,
Sciatica may be present

Bragard test
Pain is gone through by dorsi flexing the foot
Sensitivity of 91%
Specificity of 26%

Cross Leg Raising
Cross leg raising happens when the lifting from the healthy leg while using SLR method is painful in the affected leg.
Sensitivity of 33%
Specificity of 98%

Patients which have a disc prolapse and nerve root irritation will probably have a positive SLR but so might be a significant number of patients who don’t have this problem
However a positive crossed SLR test argues for any disc prolapse and nerve irritation

Others
•Other physical examination findings for example muscle weakness, sensation and reflexes ought to be used in a neurological study of the bac

MOTOR EXAMINATION
 Myotomes testing

SENSORY EXAMINATION
Dermatomes testing

IMAGING TESTS

In case your pain lasts more than four weeks or is severely, or you have another serious condition for example cancer, you may have a number of imaging tests to assist identity why the sciatic nerve is compressed and also to rule out other causes for the symptoms.
These tests include:
Spinal X-ray. Ordinary X-rays can't detect herniated disk problems or nerve damage. A spinal X-ray might help pinpoint the cause of sciatica.
Magnetic resonance imaging (MRI). This might be the most sensitive test for assessing sciatica. Instead of X-rays, MRI uses a powerful magnet and radio waves to create cross-sectional images of your back. Most MRI machines are large, tube-shaped magnets. Throughout the test, you lie on the movable table within the MRI machine.
Computerized tomography (CT) scan. This test utilizes a narrow beam of radiation to create detailed, cross-sectional images of the body. When CT is used to image the spine, you might have a contrast dye injected to your spinal canal prior to the X-rays are taken - a process called a CT myelogram. The dye then circulates around your spinal-cord and spinal nerves, which appear white around the scan.

Thursday, 19 January 2017

Homemade Pregnancy Tests


False Positive Pregnancy Test

False Positive Pregnancy Test


TODAY Parents is the premiere destination for parenting news, advice community. Find the latest parenting trends and tips for your kids and family on TODAY.com..


False Positive Pregnancy Test

False Positive Pregnancy Test

Bleach Pregnancy Test Positive

Bleach Pregnancy Test Positive


TODAY Parents is the premiere destination for parenting news, advice community. Find the latest parenting trends and tips for your kids and family on TODAY.com..