Was the injury incurred as alleged?
The plaintiff used a non motorised pallet jack which was moved by the operator pulling or pushing it. If a weighty load is upon such a pallet jack, the application of force necessary to initiate the rolling movement of the pallet from stationary is much greater than the force necessary to keep it moving once it is rolling. It is important the operator applies the initiating manual force gradually and gently, for a high application of initiating force to a stationary heavy load risks inflicting a musculoskeletal injury.
The warehouse premises was shared with the landlord who needed to always have access to store and move camper trailers.
On the afternoon of the 8th October 2018 pallets of stock were delivered to the concrete loading area outside the premises of the business. The plaintiff, Mr Welsh, used a forklift to unload pallets from the delivery truck, and he used the pallet jack to move two partly laden pallets of chicken feed ‘out of the way’ so the landlord had unobstructed access to move camper trailers.
Moving the two partly laden pallets was thus done quickly. Mr Welsh had used the pallet jack to move chicken feed on multiple occasions in the past but had not moved them so quickly in the past. Mr Welsh testified that he used both hands and pulled backwards on the pallet jack handle applying “as much effort as I could to move it as quick as possible.” He described that initiating application of force as “maximum effort”. He suffered an injury to his right knee and quadricep which worsened over the coming days and beyond.
The judgement goes into a lot of detail about the manifestation of the injury, the treatment for the injury, the time of the injury, the sensation of the injury, and the causal mechanics of the injury.
The court heard evidence about Mr Walsh’s’ surgery, development of a proximal femoral deep vein thrombosis and pulmonary embolism, chronic pain, medications, and restricted range of movement and pain that increases commensurately with the extent of demands Mr Walsh places upon his right knee by walking or performing other physical tasks with his legs. The court also heard evidence about the significant and permanent impairment of Mr Welsh’s physical capacity and its impact upon his mental health.
The plaintiffs lawyers argued that his injury was caused by his use of maximum force when pulling the pallet jack to initiate movement of the chicken feed pallets and was likely aggravated by subsequent movement of other pallets on the following day.
Biggin argued that even if the injury was caused by the events of the 8th and 9th (October 2018) it could be explained as an aggravation of pre-existing tendinopathy and may have been caused by the comparatively low strain activity of getting in and out of the forklift.
There had been a post-injury scan of the right knee which revealed early degenerative disease and tendinosis of the insertion of the quadriceps and a tear. Dr Low, an orthopaedic surgeon gave expert evidence for Mr Welsh and explained the degenerative changes were consistent with Mr Welsh’s age. He considered the tendinosis existed prior to the injury but that it was likely asymptomatic.
The Judge accepted Mr Walsh’s testimony that he became conscious he was experiencing pain in his right knee both as he was using the pallet jack and as he was using the forklift. The Judge stated [52] A symptom of pain felt in the performing two kinds of physical activity says nothing as to which of them caused it. Accordingly, the Judge heard evidence from expert engineers regarding the nature of the forces in play when pulling with significant high force a stationary laden pallet to initiate its movement and concluded, in conjunction with expert medial evidence, that it was that action by Mr Welsh which caused his physical injury.
Justice Henry determined the plaintiff to be an honest and reliable witness and accepted his version of events and found the use of such significant initiating force that afternoon was what caused the injury.