Ann R Coll Surg Engl 2010; 92: 403-405 403Carpal tunnel syndrome is common in the general population with approximately 1% incidence but can often be treated with simple night wrist splints.1 For those patients who do respond satisfactorily to conservative measures, surgical decompression is often successful.2 However, some investigators have reported that older patients can have a less satisfactory outcome after surgery, 3 though this impression is not universally shared. 4,5 To the author's knowledge, no objective explanation has been suggested for these observations. As the symptoms for carpal tunnel syndrome include wrist pain, paresthesia and weakness in grip strengths, a number of medical conditions can produce a similar clinical picture; therefore, as standard practice, our department investigates these patients with neurophysiology before a surgical treatment strategy is considered if conservative treatment is unsatisfactory. This is particularly relevant if the condition is bilateral.6 However, the author acknowledges that neurophysiological diagnosis prior to surgery for carpal tunnel syndrome is a controversial issue and that many surgeons operate on clinical grounds only. The aim of this paper was, therefore, to see if there was a significant difference in sensory or motor conduction speeds between a group of patients younger than 40 years and a group of patients older than 60 years who presented with bilateral carpal tunnel syndrome which was resistant to conservative treatment with night wrist splints.
Patients and MethodsFrom a specialist hand surgical clinic, 10 patients below 40 years of age and 20 patients above 60 years of age with a clinical diagnosis of bilateral carpal tunnel syndrome who had not benefited from conservative treatment with night wrist splints were evaluated with nerve conduction studies. The length of the standard conservative treatment period was 3 months from the time they were first seen in the clinic until they were reviewed in the clinic and referred for pre-surgical neurophysiology confirmation if they wanted surgical release due to insufficient subjective improvements of their complaints. Patients with previous surgical treatment for carpal tunnel syndrome were excluded. Median nerves in both hands were tested across the wrist and conduction speeds were calculated for both motor and sensory nerves. The Mann-Whitney non-parametric test was used for the statistical evaluation. Carpal tunnel syndrome has been reported by some to have a less satisfactory outcome in older patients following surgery. However, this impression is not supported by other investigators but no objective explanation has been suggested for these differences. In our department, such patients are routinely treated with night wrist splints and, if this is unsatisfactory, they are investigated with nerve conduction studies prior to surgery. PATIENTS AND METHODS This paper reports the neurophysiological outcome in a young (< 40 years of age) and an older (> 60 years of age) group of patients with clinic...