Blood circulation problems in the hand usually accompany chronic Carpal Tunnel Syndrome. With the rapid advances in electronic thermal imaging, this technology is now being used extensively in medicine to diagnose circulation related issues in the body.
The thermal image to the right is that of a hand of a chronic Carpal Tunnel Syndrome sufferer produced with the latest FLIR portable thermal imaging camera. The image illustrates the classic circulation problems commonly experienced by chronic Carpal Tunnel Syndrome Sufferers by representing the differences in temperature with different colors. The image below reveals a remarkable 20 degree Fahrenheit temperature differential between the forearm and the tip of the index finger in the image below.
Even the 87.1 degree reading on the forearm is well below what is expected for a hand with good circulation. An extremity like a hand should have a surface temperature above 90 degrees Fahrenheit in a normal hand for a person with good circulation. Normal body surface temperature is typically over 95 degrees Fahrenheit for a non-extremity. A normal hand would not see more than a one degree temperature differential from forearm to the tip of the digits at normal room temperature.
As one would expect, people suffering from CTS often have cold hands compared to their forearms. This is caused by constriction of the blood vessels supplying the hand with oxygen rich blood, warmth and key nutrients needed to function at peak performance. When the hand is deprived from full circulation of these critical nutrients and warmth, it does not function as well as it could.