Nationwide Independent, CPR Part 35-compliant expert evidence for Claimant and Defendant

Hand & Wrist Medicolegal  /  Thumb base arthritis and carpometacarpal instability

Expert witness reports

Thumb base and wrist arthritis expert witness reports

Independent, CPR Part 35-compliant expert evidence on thumb base arthritis, carpometacarpal instability and post-traumatic arthritis of the wrist, for personal injury and clinical negligence claims across the United Kingdom.

First author
Diagnosis and Treatment of Carpometacarpal Instability, Hand Clinics, 2022
Textbook author
Wrist arthritis chapters, Oxford Textbook of Orthopaedics & Trauma
Apley & Solomon
Co-editor across four editions
30+ years
In continuing full-time practice as a hand surgeon
Why this expert

Published authority on the instability that precedes the arthritis

Where a claim turns on whether an injury started the process

Professor Warwick is first author of Diagnosis and Treatment of Carpometacarpal Instability, published in Hand Clinics in 2022. Where a claim alleges that an injury caused or accelerated thumb base arthritis, the question is usually whether instability was set up at the time of injury, and that paper addresses it directly.

He has also published on midcarpal instability following excision arthroplasty and on the in vivo performance of wrist arthroplasty implants, and has written the wrist arthritis chapters in the Oxford Textbook of Orthopaedics and Trauma and in Apley & Solomon's System of Orthopaedics and Trauma.

Thumb base arthritis is extremely common in the general population, which makes the apportionment question, how much is attributable to the index event and how much would have occurred anyway, the issue on which these claims are usually decided.

Scope

What the report can address

Three questions are addressed in every report: whether the treatment chosen fell within the range a reasonable hand surgeon would have offered, whether a complication reflects a recognised risk or a departure from acceptable practice, and what is attributable to the natural history of the condition rather than to the treatment given. Beyond those, the report addresses the issues pleaded, and states a range of opinion where one genuinely exists.

Causation and apportionment

Whether the index injury caused, accelerated or is unrelated to the arthritis now complained of, given how common thumb base arthritis is in the general population.

Whether ligament injury at the time of the index event set up the instability that led to degeneration.

Where the literature does not support a confident conclusion either way, the report says so plainly rather than overstating the position.

Clinical negligence

Whether the instability or arthritis was reasonably diagnosed and investigated, or attributed to a soft tissue sprain without adequate assessment.

Whether the procedure selected fell within the range a reasonable hand surgeon would adopt for the stage of disease demonstrated.

Condition, prognosis and quantum

Pinch and grip strength, pain on loading, deformity, and the effect on work, hobbies and daily activities.

The likelihood and timing of further surgery and reasonable costings for future treatment.

Published work

Peer-reviewed research

A selection of Professor Warwick's published work in this area, all indexed on PubMed.

Diagnosis and Treatment of Carpometacarpal Instability
Hand Clinics · May 2022 · PMID 35465943
Investigation of the short-term in vivo performance of metal-on-carbon fibre reinforced PEEK wrist arthroplasty
Journal of Hand Surgery (European Volume) · January 2025 · PMID 38780046
Midcarpal instability after excision arthroplasty for scapho-trapezial-trapezoid (STT) arthritis
Journal of Hand Surgery (European Volume) · January 2010 · PMID 20100722
Instructing

How to instruct

Instructions are accepted from Claimant and Defendant solicitors, insurers and medico-legal agencies, and as Single Joint Expert. Examinations are held in Southampton, Winchester and Jersey, and the practice accepts instructions nationwide.

Separate rates apply for NHS Resolution panel solicitors. Fixed report fees and deferred payment terms are available. Professor Warwick's medico-legal work is fully indemnified by Sempris, and he is registered with the General Medical Council with entry on the Specialist Register.