Effects of different extents of pulley release on tendon excursion efficiency and tendon moment arms

Szu Ching Lu, Tai-Hua Yang, Li-Chieh Kuo, I. Ming Jou, Yung-Nien Sun, Fong-chin Su

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

To compare the excursion efficiency and moment arms of flexor digitorum superficialis (FDS) and profundus (FDP) among different conditions of pulley integrity related to trigger finger treatment, cadaveric fingers were first tested with an intact pulley system, and then the first (A1) and second (A2) annular pulleys were released gradually from the proximal to distal part. Linear position sensors and a motion capture system were used to measure the tendon excursion and joint rotation simultaneously. The tendon excursion efficiency was defined as the range of motion of the involved joints per unit of tendon excursion, and the tendon moment arm was determined by the slope of the linear fitting result of tendon excursion versus metacarpophalangeal (MCP) joint rotation. No significant differences were found between the release of the A1 pulley and the release extending to half the proximal part of the A2 pulley in the FDP excursion efficiency and the moment arms of FDS and FDP with respect to the MCP joint. These results imply that the release could extend to half the proximal A2 pulley, if necessary, without significantly decreasing the FDP excursion efficiency and increasing the moment arms of FDS and FDP with respect to the MCP joint.

Original languageEnglish
Pages (from-to)224-228
Number of pages5
JournalJournal of Orthopaedic Research
Volume33
Issue number2
DOIs
Publication statusPublished - 2015 Feb 1

Fingerprint

Tenotomy
Tendons
Metacarpophalangeal Joint
varespladib methyl
Fingers
Articular Range of Motion
Joints

All Science Journal Classification (ASJC) codes

  • Orthopedics and Sports Medicine

Cite this

@article{7d132343c61d4c0a94e327d7265b7ad4,
title = "Effects of different extents of pulley release on tendon excursion efficiency and tendon moment arms",
abstract = "To compare the excursion efficiency and moment arms of flexor digitorum superficialis (FDS) and profundus (FDP) among different conditions of pulley integrity related to trigger finger treatment, cadaveric fingers were first tested with an intact pulley system, and then the first (A1) and second (A2) annular pulleys were released gradually from the proximal to distal part. Linear position sensors and a motion capture system were used to measure the tendon excursion and joint rotation simultaneously. The tendon excursion efficiency was defined as the range of motion of the involved joints per unit of tendon excursion, and the tendon moment arm was determined by the slope of the linear fitting result of tendon excursion versus metacarpophalangeal (MCP) joint rotation. No significant differences were found between the release of the A1 pulley and the release extending to half the proximal part of the A2 pulley in the FDP excursion efficiency and the moment arms of FDS and FDP with respect to the MCP joint. These results imply that the release could extend to half the proximal A2 pulley, if necessary, without significantly decreasing the FDP excursion efficiency and increasing the moment arms of FDS and FDP with respect to the MCP joint.",
author = "Lu, {Szu Ching} and Tai-Hua Yang and Li-Chieh Kuo and Jou, {I. Ming} and Yung-Nien Sun and Fong-chin Su",
year = "2015",
month = "2",
day = "1",
doi = "10.1002/jor.22747",
language = "English",
volume = "33",
pages = "224--228",
journal = "Journal of Orthopaedic Research",
issn = "0736-0266",
publisher = "John Wiley and Sons Inc.",
number = "2",

}

Effects of different extents of pulley release on tendon excursion efficiency and tendon moment arms. / Lu, Szu Ching; Yang, Tai-Hua; Kuo, Li-Chieh; Jou, I. Ming; Sun, Yung-Nien; Su, Fong-chin.

In: Journal of Orthopaedic Research, Vol. 33, No. 2, 01.02.2015, p. 224-228.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Effects of different extents of pulley release on tendon excursion efficiency and tendon moment arms

AU - Lu, Szu Ching

AU - Yang, Tai-Hua

AU - Kuo, Li-Chieh

AU - Jou, I. Ming

AU - Sun, Yung-Nien

AU - Su, Fong-chin

PY - 2015/2/1

Y1 - 2015/2/1

N2 - To compare the excursion efficiency and moment arms of flexor digitorum superficialis (FDS) and profundus (FDP) among different conditions of pulley integrity related to trigger finger treatment, cadaveric fingers were first tested with an intact pulley system, and then the first (A1) and second (A2) annular pulleys were released gradually from the proximal to distal part. Linear position sensors and a motion capture system were used to measure the tendon excursion and joint rotation simultaneously. The tendon excursion efficiency was defined as the range of motion of the involved joints per unit of tendon excursion, and the tendon moment arm was determined by the slope of the linear fitting result of tendon excursion versus metacarpophalangeal (MCP) joint rotation. No significant differences were found between the release of the A1 pulley and the release extending to half the proximal part of the A2 pulley in the FDP excursion efficiency and the moment arms of FDS and FDP with respect to the MCP joint. These results imply that the release could extend to half the proximal A2 pulley, if necessary, without significantly decreasing the FDP excursion efficiency and increasing the moment arms of FDS and FDP with respect to the MCP joint.

AB - To compare the excursion efficiency and moment arms of flexor digitorum superficialis (FDS) and profundus (FDP) among different conditions of pulley integrity related to trigger finger treatment, cadaveric fingers were first tested with an intact pulley system, and then the first (A1) and second (A2) annular pulleys were released gradually from the proximal to distal part. Linear position sensors and a motion capture system were used to measure the tendon excursion and joint rotation simultaneously. The tendon excursion efficiency was defined as the range of motion of the involved joints per unit of tendon excursion, and the tendon moment arm was determined by the slope of the linear fitting result of tendon excursion versus metacarpophalangeal (MCP) joint rotation. No significant differences were found between the release of the A1 pulley and the release extending to half the proximal part of the A2 pulley in the FDP excursion efficiency and the moment arms of FDS and FDP with respect to the MCP joint. These results imply that the release could extend to half the proximal A2 pulley, if necessary, without significantly decreasing the FDP excursion efficiency and increasing the moment arms of FDS and FDP with respect to the MCP joint.

UR - http://www.scopus.com/inward/record.url?scp=84921711851&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84921711851&partnerID=8YFLogxK

U2 - 10.1002/jor.22747

DO - 10.1002/jor.22747

M3 - Article

VL - 33

SP - 224

EP - 228

JO - Journal of Orthopaedic Research

JF - Journal of Orthopaedic Research

SN - 0736-0266

IS - 2

ER -