Postoperative morphologic analysis of carpal tunnel syndrome using high-resolution ultrasonography

Chi Ho Lee, Taek Kun Kim, Eul Sik Yoon, Eun Sang Dhong

Research output: Contribution to journalArticlepeer-review

51 Citations (Scopus)


The authors evaluated the morphologic changes that follow division of the transverse carpal ligament in patients with carpal tunnel syndrome (CTS) using high-resolution ultrasonography. Ten patients, for a total of 20 hands, underwent high-resolution ultrasonographic studies before the operation and 8 months after the operation. They were all diagnosed with bilateral idiopathic CTS. The authors evaluated the configuration of the median nerve and carpal tunnel at 3 different levels of the wrist: The distal radiocarpal joint level, the pisiform level, and the hook of hamate level. The median nerve gained in thickness to a remarkable extent at 2 distal levels after the operation. The change in morphology of the carpal tunnel at these 2 distal levels was obvious, but the cross-sectional area of the carpal tunnel was increased significantly only at the hook of hamate level. The transverse diameters of the carpal tunnel were not significantly changed. As mentioned, the authors found that the median nerve gained significantly in volume at the distal part of the carpal tunnel postoperatively, and the volumetric increase in the carpal tunnel appears to have resulted from an anterior displacement of newly formed transverse carpal ligament, rather than from a widening of the bony carpal arch.

Original languageEnglish
Pages (from-to)143-146
Number of pages4
JournalAnnals of Plastic Surgery
Issue number2
Publication statusPublished - 2005 Feb
Externally publishedYes


  • Carpal tunnel syndrome
  • Morphology
  • Ultrasonography

ASJC Scopus subject areas

  • Surgery


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