A low mean platelet volume is fewer than 150,000 platelets, and fewer than 50,000 platelets might lead to mild bleeding while fewer than 20,000 platelets may lead to severe bleeding, states the University of Rochester's Medical Center. The normal range for platelets is between 150,000 and 400,000.
A low mean platelet volume can be seen on blood tests performed at the doctor's office, CBC (complete blood count) and MPV (mean platelet volume), and indicates that there are problems with the patient because there are too few platelets in the blood, according to the University of Rochester's Medical Center.
There are several external signs that a person may experience if they have a low platelet level that include bleeding from the nose, bleeding from the mouth, bleeding from the rectum, longer than usual menstrual periods and the body's inability to quickly stop small wound bleeding. If a person is experiencing any of these symptoms, then he or she should visit a doctor for blood tests. If the blood tests come back with a low platelet level, then the doctor may order additional tests for infectious diseases, bleeding disorders, inflammatory conditions, kidney failure and liver disease, says Lab Tests Online.