It is difficult to assume impact forces from just about any fall or collision. The G forces in an auto collision can be as low as 20 G's to as high as 150 G's or more. Falling on a hard floor can easily result in G forces of 150 G's to 300 G's. Any unattended event where one ends up on the floor should be considered a head impact.

A concussion specialist whose lecture I watched made an important point. he said that anytime there is a suspected impact to the head, the medical record should list the possibility of a concussion. He actually mentioned the IDC 9 code for possible concussion. It is IDC 9 CM 850.9 Concussion, unspecified.

There is adequate research to support listing a probable concussion due to the delayed symptoms of a concussion and the risks a concussion can present for later head injury.

A concussion can have only a momentary (seconds after the impact) symptom of vision or other sensory disturbance with no prolonged symptoms. Some times, the only sensation is a odd taste in the mouth. For me, this taste is usually like I have chewed a piece of aluminum foil. It should still be considered a concussion even though that symptom went away quickly.

A repeat performance of a sudden fainting or loss of consciousness deserves some serious medical consideration. It can be a seizure (drop seizure), vasovagal syncope, a heart attack, and some less frequent medical issues.