As of the date of this accident § 286.120.1 RSMo, as amended in 2005, provided, in pertinent part, as follows:
Every employer subject to the provisions of this chapter shall be liable, irrespective of negligence, to furnish compensation under the provisions of this chapter for personal injury or death of the employee by accident arising out of and in the course of the employee's employment, . . . .
The definitions of both accident and injury were significantly changed in the 2005 legislation. The definitions are set forth in § 287.020.2 RSMo and § 287.020.3 RSMo, and are as follows:
- The word "accident" as used in this chapter shall mean an unexpected traumatic event or unusual strain identifiable by time and place of occurrence and producing at the time objective symptoms of an injury caused by a specific event during a single work shift. An injury is not compensable because work was a triggering or precipitating factor.
- (1) In this chapter the term "injury" is hereby defined to be an injury which has arisen out of and in the course of employment. An injury by accident is compensable only if the accident was the prevailing factor in causing both the resulting medical condition and disability. "The prevailing factor" is defined to be the primary factor, in relation to any other factor, causing both the resulting medical condition and disability.
(2) An injury shall be deemed to arise out of and in the course of the employment only if:
(a) It is reasonably apparent, upon consideration of all the circumstances, that the accident is the prevailing factor in causing the injury; and
(b) It does not come from a hazard or risk unrelated to the employment to which workers would have been equally exposed outside of and unrelated to the employment in normal nonemployment life;
(3) An injury resulting directly or indirectly from idiopathic causes is not compensable;
(4) A cardiovascular, pulmonary, respiratory, or other disease, or cerebrovascular accident or myocardial infarction suffered by a worker is an injury only if the accident is the prevailing factor in causing the resulting medical condition;
(5) The terms "injury" and "personal injuries" shall mean violence to the physical structure of the body and to the personal property which is used to make up the physical structure of the body, such as artificial dentures, artificial limbs, glass eyes, eyeglasses, and other prostheses which are placed in or on the body to replace the physical structure and such disease or infection as naturally results therefrom. These terms shall in no case except as specifically provided in this chapter be construed to include occupational disease in any form, nor shall they be construed to include any contagious or infectious disease contracted during the course of the employment, nor shall they include death due to natural causes occurring while the worker is at work.
In addition to these definitions the legislature also provided the following additional legislation contained in § 287.020 .10 which is as follows:
In applying the provisions of this chapter, it is the intent of the legislature to reject and abrogate earlier case law interpretations on the meaning of or definition of "accident", "occupational disease", arising out of", and in the course of the employment" to include, but not be limited to, holdings in: Bennett v. Columbia Health Care and Rehabilitation, 80 S.W. 3d 524 (Mo.App. W.D. 2002); Kasl v. Bristol Care, Inc., 984 S.W.2d 852 (Mo.banc 1999); and Drewes v. TWA, 984 S.W.2d 512 (Mo.banc 1999) and all cases citing, interpreting, applying, or following those cases.