B) occurs more frequently in males
Three attributes which are highly associated with development of postoperative ulnar nerve injury are:
1) male sex - various reports suggest that 70-90% of patients with postoperative ulnar neuropathy are men
2) high body mass index - BMI > or = 38
3) prolonged postoperative bed rest.
Many patients with postoperative ulnar neuropathy have a high frequency of contralateral ulnar nerve dysfunction, suggestive of a pre-existing abnormality. Patients may not develop symptoms of ulnar neuropathy until more than 48 hours postoperatively. Wrist drop and loss of sensation of the web space between the thumb and index finger is associated with radial nerve injury
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