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Mechanism of Inferior Capsular Shift Procedure for Multidirectional Instability of the Shoulder

Research Project

Project/Area Number 12671392
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Orthopaedic surgery
Research InstitutionAkita University

Principal Investigator

ITOI Eiji  Akita University, School of Medicine, Professor, 医学部, 教授 (80193465)

Project Period (FY) 2000 – 2001
Project Status Completed (Fiscal Year 2001)
Budget Amount *help
¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 2001: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 2000: ¥300,000 (Direct Cost: ¥300,000)
Keywordsshoulder instability / multidirectional instability / inferior capsular shift / loose shoulder / Intraarticular pressure / 熱関節包縫縮術
Research Abstract

We performed this experimental study to investigate the mechanism of inferior capsular shift procedure to stabilize the shoulder with multidirectional instability.
We used 10 fresh previously-frozen cadaveric shoulders. All the muscles were removed from the shoulder, and the scapula was stabilized to the custom-made shoulder fixator. The position of the humeral head relative to the glenoid was measured using plain roentgenograms. The humerus was loaded inferiorly with 0 kg, 0,5 kg, and 1.0 kg load. The capsular conditions were 1) intact, 2) anteroinferior capsule imbricated using a clamp, 3) posteroinferior capsule imbricated in the same fashion. The Intraarticular pressure was measured using a pressure sensor attached to the catheter filled with saline.
The negative value of intraarticular pressure increased with the increase of the load in a linear fashion. This was also observed after imbrication of anterior and posterior capsule. There was no significant difference between the capsular conditions. The position of the humeral head translated less than 5 mm when the Intraarticular pressure was intact regardless of capsular conditions. When the Intraarticular pressure was vented, the humeral head dislocated inferiorly. After the imbrication of anterior and posterior capsule, the humeral head was still inferiorly subluxated.
In conclusion, the major stabilizing mechanism of the inferior capsular shift procedure is to maintain the intraarticular pressure by reducing the joint volume.

Report

(3 results)
  • 2001 Annual Research Report   Final Research Report Summary
  • 2000 Annual Research Report
  • Research Products

    (21 results)

All Other

All Publications (21 results)

  • [Publications] 井樋 栄二: "動揺肩の病態"日本整形外科学会雑誌. 74. S259 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] 井樋 栄二: "動揺肩のバイオメカニクス"Monthly Book Orthopaedics. 19(印刷中). (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Itoi E: "The effect of glenoid defect on anteroinferior stability of the sbonlder after Bankaut repair"J Bone Joint Snug. 82-A. 35-46 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Halder Am: "Anatomy and biomechanics of the shorlder"Orehop Clin North Am. 31. 159-176 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Itoi E: "Position of immobilization after disloation of the gleno-hmmeral joint : a stndy with use of MRI"J Bone Joint surg. 83-A. 661-667 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Itoi E: "Range of motion after Bomkart repair : vertical compared with herizontel capsnlotomy"Am J Sports Med. 29. 441-445 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] 井樋 栄二: "NEW MOOK整形外科10肩の外科,肩の動作解析バイオメカニクス"金原出版. 353 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Itoi E, et al.: "Pathophysiology of Multidirectional instability of the shoulder"Jpn Orthop Assoc(In Japanese). 74. S259 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Itoi E: "Biomechanics of multidirectional instability"Monthly Book Orthopaedics. 19(In Press). (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Itoi E, et al.: "The effect of a glenoid defect on anteroinferior stability of the shoulder after Bankart repair: a cadaveric study"J Bone Joint Surg [Am]. 82-A. 35-46 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Halder AM, et al.: "Anatomy and biomechanics of the shoulder"Orthop Clin North Am. 31. 159-176 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Itoi E, et al.: "Position of immobilization after dislocation of the glenohumeral joint: a study with use of magnetic resonance imaging"J Bone Joint Surg [Am]. 83-A. 661-667 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Itoi E, et al.: "Range of motion after Bankart repair: vertical compared with horizontal capsulotomy"Am J Sports Med. 29. 441-445 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Itoi E: "Motion analysis and biornechanics of the shoulder"New Mook of Orthopaedics Vol. 10: Shouldeer Diseases, 1st Ed. Edited by Ochi T, Kikuchi S. Kanehara, Tokyo(In Japanese). 1-353 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] 井樋栄二: "動揺肩のバイオメカニクス"Monthly Book Orthopaedics. 19(印刷中). (2002)

    • Related Report
      2001 Annual Research Report
  • [Publications] Itoi E: "Position of immobilization after dislocation of the genohumecal joint : a study with use of MRI"J.Bone Joint Surg. 83-A. 661-667 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Itoi E: "Range of motion after BankarA repair : vertical compared with horizontal capsnlotomy"Am J Sports med. 29. 441-445 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] 井樋栄二: "NEW MOOK整形外科10肩の外科,肩の動作解析・バイオメカニクス"金原出版. 353 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Itoi E: "The effect of a glenoid defect on atneroinferior stability of the shoulder after BAnkart repair."J Bone Joint Surg. 82-A. 35-46 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Halder AM: "Anatomy and biomechanics of the shoulder."Orthop Clin North Am. 31. 159-176 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 井樋栄二: "動揺肩の病態"日整会誌. 74. S259 (2000)

    • Related Report
      2000 Annual Research Report

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Published: 2000-04-01   Modified: 2016-04-21  

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