(D) HISTORY OF TREATMENT: THE 1993 INJURY
76The plaintiff was originally referred to Dr Warwick J.M. Bruce, Orthopaedic Surgeon, by a Dr A Pricolo of Western Suburbs Hospital. Dr Bruce treated him in respect of his 1993 injury between 24 May 1993 and 27 September 1993. Dr Bruce's reports were tendered in the first hearing and are contained within Blue Appeal Book 3 at pp 981-1000.
77Dr Bruce took a history of the plaintiff having fallen on 23 May 1993 between a truck and a loading ramp hitting his lumbar spine: Dr Bruce's first report (24 May 1993). Following radiological investigation and a CT scan performed on 26 May 1993, Dr Bruce diagnosed a posterior protrusion of the L5 disc with indentation of the thecal sac. He noted a fragment had separated from the posteroinferior aspect of the L4 vertable body in association with the disc lesion contributing to the indentation of the thecal sac.
78He reviewed the plaintiff on further occasions, in particular, on 7 June 1993, 24 June 1993, 19 July 1993, 26 August 1993, 27 September 1993.
79In his report of 27 September 1993, Dr Bruce noted that the plaintiff at that time was still on light duties and did not get much pain "except for an occasional twinge": (Blue AB 992). In the same report he said "I am very happy with his progress and will see him in 6 weeks time".
80He subsequently saw him on and after 7 December 1993 in respect of a right knee problem and pain in the right thigh. Following his review on 7 December 1993, Dr Bruce observed, "back is now good with no real discomfort and no right leg pain".
81On 23 May 2007, Dr Bruce provided the plaintiff's then solicitors, Young and Muggleton, with a comprehensive report setting out the full accident history, investigations and results on examination.
82So far as the plaintiff's back was concerned, Dr Bruce wrote:
"It seems the last time I saw him about his back was on the 27th September, 1993. He was still on light duties and did not get much pain except for an occasional twinge. He had a normal gait and could walk on his heels and toes. There was mild restriction of lumbar spine movement but no neurological signs. At that time I said I was happy with his progress and I would see him in 6 weeks time. I am not sure if I saw him again."
83A little later in his report he stated:
"We can say that after his recovery from the 1993 accident he led a very active life and did not have back problems until the injury in 2003. Also recurrent pain from a disc injury usually occurs with lifting or twisting. The fact that he was in a bike accident being hit by a car is a different mechanism of trauma than the spinal surgeons that had operated on his back are the ones that can best comment on whether this is a different injury." (Blue AB 3, 1000).
84Doctor Robert S Cameron, Consultant Surgeon, examined the plaintiff on behalf of QBE Workers Compensation (NSW) Limited, the workers compensation insurer of the plaintiff's then employer. He wrote a report dated 17 September 2004: (Blue AB 3, 1001-1004).
85In the report, Dr Cameron recorded that the plaintiff had been under Dr Bruce's care, had had physiotherapy for a few weeks and some spa treatment afterwards, but had no other active treatment. He recorded the position following the 1993 injury as follows:
"... symptoms gradually resolved over ensuring months and he was certified fit for work on light duties last month. At that stage he resigned from his position with World of Fruit and he does not intend to return to heavy work. Last week he started a trial of unpaid work as a waiter, working 2 or 3 hour shifts about once a week."
86Dr Cameron expressed the opinion that the plaintiff had sustained an injury to his back with a fracture of the L4 vertebral body posteriorly and some probable injury to the L4/5 intervertible disc. He noted he had been treated conservatively, and on examination he showed mild restriction of back movement, probably with some overprotection. He noted that symptoms in the right lower leg were not consistent with an organic nerve distribution. Dr Cameron wrote:
"Mr Checchia is expected to make a full recovery from his injury. There is no indication for surgical or other active medical treatment.
Mr Checchia is now fit to return to work on a basis of graduated selected duties. He remains unfit for work involving heavy lifting or repeated bending, probably for the next six months. As Mr Checchia has resigned from his work with World of Fruit, a graduated increase of work as a waiter would be appropriate for the time being ...
The prognosis is for full recovery without permanent impairment."
87On the evidence the plaintiff resumed work as a waiter. Mr Roberts SC, who provided the defendant insurer with two expert opinions (discussed below) noted on the material reviewed by him that the plaintiff had apparently changed his employment as a result of the 1993 injury and had some back pain in September 1994 on moderate lifting and bending and some reduced sensation in the right leg. Mr Roberts also stated in his first report, at [21], that he proceeded on the assumption that after 1994 the plaintiff did not suffer from symptoms of any movement in his lower back and his capacity to perform work as a waiter/supervisor was unaffected. That, with respect, appears to be an accurate statement of the plaintiff's post-1993 condition, supported by the evidence in the present proceedings.
88The plaintiff was examined by Dr JM Matheson, Consultant Neurosurgeon, on behalf of the defendant insurer. As discussed below, Dr Matheson provided a number of reports. In his initial report dated 6 October 2005, Mr Matheson expressed the opinion that the plaintiff had a large calcified disc lesion on the right side which was certainly present before the accident. He recorded that the plaintiff denied any symptoms prior to the 2003 accident and that the accident appears to have precipitated further prolapsing of the disc at L4/5 and the entrapment of the L5 nerve root. He stated that this was probably due to the accident but not certainly so. He stated that it would be impossible to deny a relationship: (Blue AB 3, 1104).
89Dr Matheson provided a further report dated 11 October 2005 in which he noted that Dr R Rushworth had diagnosed the plaintiff with a recurrent L4/5 disc lesion and that Dr Rushworth had felt that the subject accident was a substantial contributing factor to his condition. He also noted reports of other doctors including Dr Steele dated 27 October 2004, and Dr John Lawson dated 29 March 2005. He stated that nothing in the reports caused him to alter his previously expressed opinion.
90Dr Matheson wrote a report dated 18 March 2006 to the defendant's solicitors. He referred to the fact that the plaintiff had undergone back surgery on three occasions. The initial surgery, he noted, was undertaken by Dr Parkinson. He was later operated on on 26 July 2004 by Dr Steele. In the Opinion section of the report he noted that the plaintiff through having undergone three back operations was not improving, and that he had some functional features:
"... but nevertheless an established disability is present. Whilst it is almost certain there are some degenerative changes in his back prior to his accident, the history given from the accident would lead us to believe that it caused the prolapse of the L4/5 disc and ultimately his surgery and disability. This would have to be related to the accident ..." (Blue AB, Vol 3 at p1111). (emphasis added)
91On 12 December 2006, Dr Matheson wrote a report to the defendant's solicitors which addressed information that had been supplied to him concerning the plaintiff's back injury sustained in 1993. He stated that that information influenced his opinion. Having regard to observations that he had earlier made as to degenerative changes, he said that the new information about the 1993 injury had come as no surprise to him. In his conclusion he stated that the information relating to the 1993 incident which included the employer's Report of Injury, a report from Dr Bruce dated 27 May 1993 reporting on investigations, and a report to QBE dated 19 July 1993 as well as the report of Dr Cameron dated 19 September 1994, led him to state that such material:
"... makes me radically alter my opinion of 18th May 2006. Clearly the incident of 21st January 2003 had little effect on him. It was merely a recurrence of his symptoms falling off a bike. It did not cause the L4/5 prolapse which was present many years earlier. It is clear that the main genesis of his problems is in 1993 and the incident of 21 January 2003 is unlikely to have played any part in the progression of his symptoms."
92Dr Matheson did not identify specifically how the additional information operated to require an alteration of his opinion given Dr Bruce's opinion to the effect that the plaintiff had recovered from the 1993 injury, together with the history of him working without loss of time over the period of almost 10 years (1993 to January 2003) and the later history that discogenic symptoms and findings linked to the production of neurological symptoms in the plaintiff's right lower back commenced after the 2003 accident. I will return to Dr Matheson's alteration of his opinion below.
93On 26 August 2008, Dr Matheson reported to the defendant's solicitors on having viewed video film. He concluded that the material suggested that the plaintiff had "a minor back disorder" and he considered that the film indicated "... he was exaggerating a bit when he was close to a medical environment but there is evidence of minor back disorder in some of the other film but also evidence that he is capable of working ..." (Blue AB 3, 1117). Dr Matheson's opinion based on the video surveillance in this regard, as noted below, was contrary to other medical opinions given in evidence.
94On 18 September 2008, Dr Matheson issued his final report, again commenting on film of the plaintiff that he had been shown. He did not consider that it showed him doing anything strenuous, that it did not exclude a back disability, but it showed that he was quite functional.
95The medical history, including the history of the treating doctors, was reviewed by Mr Roberts SC in his Opinion dated 14 June 2012 at [23] to [49]. Mr Roberts took into account in his analysis the fact that subsequent to the 2003 accident the plaintiff had undergone surgery on three occasions, namely:
(i) On 12 May 2003 by Dr Parkinson - a right L5 rhizolysis and L4/5 discectomy.
(ii) On 26 June 2004, a further discectomy - at operation the L4 nerve root was found to be significantly compressed by pieces of floating disc.
(iii) On 21 November 2005, performance by Drs Parkinson and Bentivoglio of a further decompression at L4/5 and a pedicle screw fusion at that level.
96Mr Roberts reviewed the reports of the defendant insurer's qualified specialists at [69] to [80] of his opinion. (This review did not include Dr Matheson's report concerning the new material that had been supplied to him confirming the fact of the 1993 injury.) Mr Roberts then assessed the question of the plaintiff's capacity for work based on the medical evidence available to him.
97As to his capacity for work subsequent to the 1993 accident, Mr Roberts concluded in his Opinion of 14 June 2012:
"104 It would certainly have been open to the plaintiff to argue that he had, to all intents and purposes, no residual incapacity. On any view, such residual capacity he had was extremely limited. No one suggests he could have gone back to his pre-injury employment or a full-time basis, and most suggest that only sedentary work, probably on a part-time basis, would have been appropriate."
98In oral evidence, Mr Roberts accepted that he was indicating in that paragraph that it was open to the plaintiff to argue that he had no residual incapacity, and on any view it was extremely limited: (T 201, lines 4-7).
99He indicated that he did not think that Dr Bowers' assessment of the plaintiff's residual earning capacity would translate into a very likely finding.
100He said:
"... I think it was Dr Bowers who said in his report that he could work something like - correct me if I am wrong - two-thirds of normal hours or something. My view was that that would be a very unlikely finding, it would be too high a residual capacity": (T 201:15-20)
101Mr Roberts observed in respect of Dr Cameron's report:
"... however it is notable that the plaintiff apparently changed his employment as a result of the 1993 injury and even in September 1994 he noticed some back pain after moderate lifting or bending and still had some reduced sensation in his right leg (see Dr Cameron's report): at [20].
102In his conclusions, Mr Roberts observed:
"128 To my mind the plaintiff's failure to disclose this prior injury, even though it occurred 10 years prior to subject injury, could hardly have been the result of forgetfulness. According to the history he gave Dr Cameron, he changed occupations following his injury. He had been hospitalised for 3 days following the injury and had been off work for about 3 months.
129 Of course this would probably go to the plaintiff's credit. It is conceivable that NRMA may have been able to obtain a report before trial raising the possibility that his pre-existing condition would have come against him in any event and thus affecting the award for future loss. However, accepting the lack of symptoms for a number of years prior to the subject accident, that seems unlikely."
103On the question as to whether the 1993 injury had played any significant role in the plaintiff's ongoing back disability/symptoms and the cause of his ongoing incapacity, Mr Roberts in his oral evidence expressed his opinion on the significance of matters established by the medical evidence. He stated:
"Applying the lawyer's eye to it it would seem to me that the earlier injury did nothing more than render him more susceptible. Dr Matheson talks of there being a calcified lesion, but it wasn't causing any - I accepted that wasn't causing any symptoms until the current, the subject accident": T 202, lines 3-6.
104Mr Roberts was asked about the failure to disclose the 1993 injury. It was put to him:
"Q. It seems, I think based on your evidence and analysis that at the end of the day the prior injury couldn't be said to play any on-going role, certainly not a significant role, in the disability which put him out of work.
A. Yes." (T 202, lines 32-36)
105Mr Roberts' evidence provides an expert assessment by Senior Counsel, of the significance of the medical evidence upon the issues relevant to the settlement value of the plaintiff's claim.
106It is clear that Mr Roberts, with respect, accurately recorded and analysed the medical evidence. His conclusion that the 1993 injury did not play any significant ongoing role in the disability which put the plaintiff off work in 2003, was well supported by the medical evidence including, in particular, the evidence of Dr Bruce and Dr Parkinson. Dr Matheson's later and altered opinion (see [91] above), conflicts with the opinions of Dr Bruce, the treating specialist responsible for the plaintiff's treatment in 1993 and of Dr Parkinson who treated him in the 2003-2006 period respectively. Having closely considered their evidence, I find their opinions quite compelling. Additionally, there was lay evidence to which I have earlier referred that the plaintiff had appeared to be working and otherwise proceeding without signs of back disability in the years leading to the accident in 2003.
107Dr Parkinson reviewed the medical history of the plaintiff's treatment in 1993, including, in particular, the reports of Drs Bruce and Cameron. He concluded:
"Based on this, and the fact that Mr Checchia went on to continue full employment following this injury and did not require any further treatment beyond what Dr Bruce had performed in 1993, that if Mr Checchia had suffered a chronic injury at that time, then it would have caused trouble for him in the 10 years in between the first accident and the second.
I am entirely of the opinion that Mr Checchia's trouble with his back and leg which are causing his current symptoms have resulted from the motor vehicle accident and secondarily from the treatment which has been required following it. This includes the spinal surgery which he has undergone.
I am not of the opinion that there is any pre-existing component to his current condition attributable to the 1993 accident, for the above reasons ..."
108The cross-examination of Dr Parkinson at Black AB 1, 451-484, did not undermine either the fundamental reasons upon which Dr Parkinson's opinion was expressed, nor his conclusion on attributability (the 2003 accident and subsequently surgery for the disc injury sustained in that accident).
109Examination of Dr Matheson's oral evidence does not, as earlier indicated, provide any basis or explanation for his revised opinion in his 12 December 2006 report. As has been established, the prime duty of an expert in giving opinion evidence is to furnish the trier of fact with criteria enabling evaluation of the validity of the expert's conclusions: Makita (Australia) Pty Ltd v Sprowles (2001) NSWLR 705, 729 per Heydon JA (as his Honour then was); Dasreef Pty Ltd v Hawchar [2011] 243 CLR 588 at [37].
110He gave extensive evidence-in-chief beyond his written reports (Black AB 1, 619, 626). He was cross-examined at 626-641. He was asked in evidence-in-chief about findings made on operation. The first surgery, as earlier noted, was performed by Dr Parkinson on 12 May 2003 (not 23 May 2003 as Dr Matheson stated in his first report (Black AB 1, 1102). In that report, Dr Matheson identified each of the "investigations" performed (radiological, MRI and CT scans). He did not, however, refer specifically in any of his reports to Dr Parkinson's detailed "Operation Note" on his findings at surgery on 12 May 2003.
111In oral evidence Dr Matheson did not have a copy of the "Operation Note" but claimed that he could recall the "report": Black AB 2, 621 L-M. He was then invited by Senior Counsel for the defendant to comment "about the operation findings as found by Dr Parkinson ..." at 621 M-N. He replied:
"A. I found it clear that there was a scarred up mass as they put it and was not disc material so there was nothing new is 'seen' and no new pathology evident. Or unreported, anyway." Black AB 2, 621 M-P.
112He then went on to deal with the effect of the 2003 injury upon that basis (at 621 P-X).
113Dr Matheson's evidence on the operation findings as set out above is, as evident from Dr Parkinson's reported findings, however, quite inaccurate and his opinions on causation are, in my opinion, affected by that inaccuracy. Specifically:
Dr Parkinson, as the operation surgeon, did not describe his findings as a "scarred up mass" as Dr Matheson claimed.
There was, in fact, a finding of "new pathology" as Dr Parkinson's "Operation Note" and his report of 10 November 2005 (Blue AB 3, 1214) both make clear. Dr Parkinson's "Operation Note" records the following findings:
"... a broad based disc herniation could be palpated at the L4/5 disc. Retracting the dura showed a large intra annular L4/5 disc protrusion with no evidence of any extruded fragment. This appeared to be compressing the L5 nerve root at its axilla. The postero lateral disc was incised with a number 15 scalpel blood and free fragments of disc were meticulously removed with great care."
114Dr Matheson did not refer to or address each or any of Dr Parkinson's specific findings. Dr Parkinson was cross-examined about the surgery and findings on the operation he performed on 12 May 2003: Black AB 1, 458-459. It was not put to him that there was "no new pathology evident" as Dr Matheson claimed in his evidence at Black AB 2, 621. Nor was it put to Dr Parkinson in cross-examination that there was no "broad based disc herniation", or no "large intra annular 4/5 disc protrusion" or that there was no compression by that disc causing the disc herniation. No proposition was put to Dr Parkinson in cross-examination that his findings as reported by him in his Operation Note for 12 May 2003 (or anyone of them) were not recent or did not or may not have been caused by the 2003 motor vehicle accident. In other words the cross-examiner did not set out in cross-examination to establish that no new pathology arose from the 2003 motor vehicle accident.
115Dr Matheson's evidence on the pathological effects of the 2003 accident, and his views on causation in relation to that accident and the 1993 injury, were, with respect, in the nature of unsupported and unexplained assertions which conflicted with the unchallenged evidence of Dr Parkinson.
116On the evidence, and I so find, the plaintiff made an effective recovery from the 1993 injury. By December 1993 he had regained his capacity to undertake a wide range of work, and he in fact worked thereafter until January 2003 in the hospitality industry as a waiter.
117The medical evidence overall clearly supported the plaintiff's claim for damages on the issue of causation. Apart from Dr Matheson's revised opinion, the evidence, as Mr Roberts properly accepted, favoured a causal nexus between the 2003 accident and the onset of a discogenic lesion and associated pain at the L4/5 level with L5 nerve root radiculopathy.
118In considering settlement of the plaintiff's claim, if the defendant insurer had possessed knowledge of the 1993 accident and injury and associated medical treatment, in light of the evidence and opinions of the treating doctors in 1993 it, in my opinion, could not, and would not, have considered that there existed an evidentiary basis to support a significant discount on settlement by reason of the fact that the claimant had sustained injury to his lumbar spine in 1993. Mr Roberts' Opinion, as I have noted, in effect, accepted that proposition. Whilst the 1993 accident/injury may be seen as a matter that was relevant to the plaintiff's reliability insofar as the level of his subjective symptoms following the January 2003 accident was concerned, the available medical opinion of treating specialists, as at October 2006, as discussed above, strongly supported the plaintiff's claim, firstly, on the issue of causation and, secondly, having regard to the operative findings and the need for multiple surgical procedures, on the issues of his ongoing disability and incapacity.