Employers Covered Under the HCSO. An Employer is covered under the HCSO if it: 1  Is a for-profit business with 20 or more employees, or a non-profit business with 50 or more employees; and. 2  Has employees who work in San Francisco.
(November 2009). Thoracic outlet syndrome (TOS) is a syndrome involving compression at the thoracic inlet, which is known clinically as the superior thoracic outlet resulting from excess pressure placed on a neurovascular bundle passing between the anterior scalene and middle scalene muscles.horacic outlet syndrome (TOS) is a syndrome involving compression at the thoracic inlet, which is known clinically as the superior thoracic outlet resulting from excess pressure placed on a neurovascular bundle passing between the anterior scalene and middle scalene muscles.
REMOVING RIB RELIEVES PRESSURE FROM THORACIC OUTLET SYNDROME. Thoracic Outlet Syndrome (TOS) is caused by compression of the principal nerves and/or blood vessels in the shoulder area. Because other conditions can create similar symptoms, patients may experience a variety of doctors and treatments before they are properly diagnosed.