Claimant asserts that he developed bilateral carpal tunnel syndrome from all the various repetitive work activities he testified to having performed over his past 15 years of employment with Employer. Employer contends that Claimant's work is not the prevailing factor and disputes medical causation.
Having given careful consideration to the entire record, based upon the competent and substantial evidence presented during the hearing, and the applicable law of the State of Missouri, I make the following rulings of law: Claimant sustained an occupational disease which arose out of and in the course of his employment.
Claimant has the burden to prove all essential elements of a claim, including causation. Decker v. Square D Co., 974 S.W.2d 667, 670 (Mo.App. 1998). When a worker seeks compensation for carpal tunnel syndrome, she must submit a medical expert who can establish the probability that working conditions caused the disease. Id. A claimant's medical expert in an occupational disease case must establish within a "reasonable probability" that the disease was
caused by conditions in the work place. Pippin v. St. Joe Minerals Corp., 799 S.W.2d 898, 902 (Mo.App. 1999) (Citations omitted). 'Probable means founded on reason and experience which inclines the mind to believe but leaves room for doubt.' Thorsen v. Sachs Elec. Co. 52 S.W.3d 611, 620 (Mo.App. 2001) (Citations omitted). Such proof is made only by competent and substantial evidence. It may not rest on speculation. Griggs v. A. B. Chance Company, 503 S.W.2d 697, 703 (Mo.App. 1974). (Citations omitted).
Section 287.067 .1 and 3 state:
1) "Occupational disease" is defined as... an identifiable disease arising with or without human fault out of and in the course of the employment. Ordinary diseases of life to which the general public is exposed outside of the employment shall not be compensable, except where the diseases follow as an incident of an occupational disease as defined in this section. The disease need not have been foreseen or expected but after its contraction it must appear to have had its origin in a risk connected with the employment and to have flowed from that source as a rational consequence.
2) An injury due to repetitive motion is recognized as an occupational disease for purposes of this chapter. An occupational disease due to repetitive motion is compensable only if the occupational exposure 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. Ordinary, gradual deterioration or progressive degeneration of the body caused by aging or by the normal activities of day-to-day living shall not be compensable.
Carpal tunnel syndrome is an occupational disease. Townser v. First Data Corp., 215 S.W.3d 237, (Mo. App. 2007). To prove an occupationally induced disease rather than an ordinary disease of life involves two considerations: (1) whether there was an exposure to the disease which was greater than or different from that which affects the public generally, and (2) whether there was a recognizable link between the disease and some distinctive feature of the employee's job which is common to all jobs of that sort. Id at 241-242. "[T]he claimant must establish, generally through expert testimony, the probability that the occupational disease was caused by conditions in the work place. . . . A single medical opinion will support a finding of compensability even where the causes of the disease are indeterminate. The opinion may be based on a written report alone." Id. at 242.
Manipulations and flexions, iterated and reiterated within a concentrated time, are unusual conditions, and if they inhere in an employment task being performed by an employee, they expose the employee who performs them to a risk not shared by the public generally and to which the employee would not have been exposed outside of employment, and thus qualify for compensation pursuant to The Law. Collins v. Neevel Luggage Manufacturing Company, 481 S.W. 2d 548, 555 (Mo.App. 1972). I find Claimant's job duties as employee in the Tank Weld Department exposed him to a greater risk than the general public in that he performs far more repetitive motions and movements with his wrists than those outside his occupation.
In this case, both doctors agree Claimant has severe carpal tunnel syndrome and recommend surgery to address his symptoms and complaints however, they disagree on causation. I find Dr. Rosenthal's opinion is more credible than Dr. Miller's opinion. While both Dr. Rosenthal and Dr. Miller are qualified orthopedic specialists and both examined and discussed Employee's job demands with him, I find Dr. Rosenthal's opinion to be more credible. I disagree with Dr. Miller's conclusion that the prevailing factor of Claimant's medical condition is not his work duties. Dr. Miller relied on the opinion of an ergonomics report to form his
medical causation opinion. Employer's witnesses Nehrbass and Fife both testified that the Claimant was required to work in approximately 20 different stations over a two to three week period. Nehrbass testified that the report reflected and was based on three of the stations Claimant worked in. I do not find that the ergonomics report fairly and accurately reflects all of Claimant's job duties in the Tank Weld Department. Therefore, I do not find the ergonomics report to be credible. Based on my understanding of the complete job duties required of Claimant, all of which I find to be of a repetitive nature, I find and agree with Dr. Rosenthal's conclusion that work is the prevailing factor to cause Claimant's bilateral carpal tunnel condition.
Based on Claimant's credible testimony that his job duties were repetitive in nature and the medical reports of Dr. Rosenthal, I find Claimant met his burden of proof to show his repetitive work duties were the prevailing factor to cause his bilateral carpal tunnel condition and current need for treatment on all those conditions.
I find that Claimant sustained an occupational disease which arose out of an in the course of his employment and is medically causally related to his work activities. Employer shall provide future medical treatment for his bilateral upper extremity complaints.
This is a temporary award addressing limited issues. Other issues are deferred. The Division of Workers' Compensation retains jurisdiction over the matter until all issues are fully resolved by way of final award or settlement.
Made by:
Angie Heffner Robyn
Administrative Law Judge
Division of Workers' Compensation