Carpal Tunnel

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Nigel I. Hartnett - One of the best experts on this subject based on the ideXlab platform.

William P. Cooney - One of the best experts on this subject based on the ideXlab platform.

  • Effect of lumbrical muscle incursion within the Carpal Tunnel on Carpal Tunnel pressure: A cadaveric study*
    The Journal of hand surgery, 1995
    Co-Authors: Tyson K. Cobb, William P. Cooney
    Abstract:

    Lumbrical muscle incursion within the Carpal Tunnel has been implicated as a possible cause of Carpal Tunnel syndrome. During finger flexion, surgeons have observed the presence of lumbrical muscles in the Carpal Tunnel. However, the significance of this incursion has not been evaluated. To evaluate the effect of lumbrical muscle incursion within the Carpal Tunnel as a cause of Carpal Tunnel syndrome, Carpal canal pressures were measured in cadaver hands at the level of the hamate hook for four finger positions: (1) 100% finger flexion; (2) 75% finger flexion; (3) 50% finger flexion; and (4) full extension. After measuring Carpal Tunnel pressures for each position, the lumbrical muscles were excised and the pressures were again recorded. A progressive increase in Carpal Tunnel pressure was noted for each degree of finger flexion in the group with intact lumbricals. This is in sharp contrast to a relatively stable Carpal Tunnel pressure during finger flexion for the group without lumbrical muscles. Two-way repeated measures analysis of variance revealed a significant difference in Carpal Tunnel pressure for both variables, lumbrical muscles and finger position. One-way repeated measures analysis of variance for Carpal Tunnel pressures demonstrated that the effect of finger position was significant for the group with intact lumbricals but not for the group with lumbricals removed. We conclude that lumbrical muscle incursion into the Carpal Tunnel can result in elevation of Carpal Tunnel pressure in cadaver hands and could be a variable in the cause of work-related Carpal Tunnel syndrome.

Lynn D. Ketchum - One of the best experts on this subject based on the ideXlab platform.

  • A comparison of flexor tenosynovectomy, open Carpal Tunnel release, and open Carpal Tunnel release with flexor tenosynovectomy in the treatment of Carpal Tunnel syndrome
    Plastic and reconstructive surgery, 2004
    Co-Authors: Lynn D. Ketchum
    Abstract:

    The purpose of this study was to identify the advantages and disadvantages of performing a flexor tenosynovectomy without dividing the transverse Carpal ligament, an open Carpal Tunnel release, and an open Carpal Tunnel release with flexor tenosynovectomy in the treatment of Carpal Tunnel syndrome. From 1990 to 1998, a retrospective study was done in which a flexor tenosynovectomy was performed in 133 patients without division of the transverse Carpal ligament and compared with 68 patients who had an open Carpal Tunnel release and 75 patients who had an open Carpal Tunnel release and flexor tenosynovectomy. Patients were followed up for an average period of 30 weeks with history and physical findings and nerve conduction velocities and for an average period of 2.6 years with telephone interviews. There was a 2.3 percent incidence of pillar pain in the flexor tenosynovectomy group, which may explain the earlier return to their regular jobs at an average time of 9.9 weeks, compared with 10.7 weeks for the Carpal Tunnel release group and 12.0 weeks for the Carpal Tunnel release/flexor tenosynovectomy group. The latter two groups had an incidence of pillar pain of 12.1 percent and 25.3 percent, respectively. Postoperative grip strength was statistically significantly improved in the flexor tenosynovectomy group compared with the other two groups, where adjustments were made for sex and preoperative grip strengths with standard error of adjusted means. In the flexor tenosynovectomy group, 20.6 percent of patients had a previous open or endoscopic Carpal Tunnel release with recurrent Carpal Tunnel syndrome, compared with 5.2 percent in the open Carpal Tunnel release group and 21.6 percent in the open Carpal Tunnel release with flexor tenosynovectomy group. Excisional biopsies of flexor tenosynovium in the flexor tenosynovectomy, open Carpal Tunnel release, and open Carpal Tunnel release with flexor tenosynovectomy groups revealed an incidence of fibrosis in 89.2 percent, 88.9 percent, and 87.7 percent of specimens, respectively. Edema was a frequent finding, but an active inflammatory response was seldom seen. The findings in this study indicate that because of a significant decrease in pillar pain, a flexor tenosynovectomy in the treatment of Carpal Tunnel syndrome would likely benefit workers who use the palm of the hand in heavy manual or highly repetitive work by allowing them to return to regular duty sooner.

David P. Gwynne-jones - One of the best experts on this subject based on the ideXlab platform.

Tyson K. Cobb - One of the best experts on this subject based on the ideXlab platform.

  • Effect of lumbrical muscle incursion within the Carpal Tunnel on Carpal Tunnel pressure: A cadaveric study*
    The Journal of hand surgery, 1995
    Co-Authors: Tyson K. Cobb, William P. Cooney
    Abstract:

    Lumbrical muscle incursion within the Carpal Tunnel has been implicated as a possible cause of Carpal Tunnel syndrome. During finger flexion, surgeons have observed the presence of lumbrical muscles in the Carpal Tunnel. However, the significance of this incursion has not been evaluated. To evaluate the effect of lumbrical muscle incursion within the Carpal Tunnel as a cause of Carpal Tunnel syndrome, Carpal canal pressures were measured in cadaver hands at the level of the hamate hook for four finger positions: (1) 100% finger flexion; (2) 75% finger flexion; (3) 50% finger flexion; and (4) full extension. After measuring Carpal Tunnel pressures for each position, the lumbrical muscles were excised and the pressures were again recorded. A progressive increase in Carpal Tunnel pressure was noted for each degree of finger flexion in the group with intact lumbricals. This is in sharp contrast to a relatively stable Carpal Tunnel pressure during finger flexion for the group without lumbrical muscles. Two-way repeated measures analysis of variance revealed a significant difference in Carpal Tunnel pressure for both variables, lumbrical muscles and finger position. One-way repeated measures analysis of variance for Carpal Tunnel pressures demonstrated that the effect of finger position was significant for the group with intact lumbricals but not for the group with lumbricals removed. We conclude that lumbrical muscle incursion into the Carpal Tunnel can result in elevation of Carpal Tunnel pressure in cadaver hands and could be a variable in the cause of work-related Carpal Tunnel syndrome.