The assessment of a nerve repair usually focuses on the level of sensory an
d motor recovery distal to the site of the repair. However, the development
of a painful neuroma or nerve junction, particularly in a digit, can be ju
st as disabling to the patient as an area of anaesthesia. An instrument has
been developed to assess objectively the severity of neuroma formation at
nerve-repair sites by measuring the threshold percussive force required to
elicit a Tinel's sign using standard weights dropped from a uniform height
in a tube. (C) 2000 The British Association of Plastic Surgeons.