Intraarticular pressure of the shoulder

E. Itoi, N. E. Motzkin, A. O. Browne, P. Hoffmeyer, B. F. Morrey, K. N. An

Research output: Contribution to journalArticle

35 Citations (Scopus)

Abstract

Nine fresh frozen cadaveric shoulders were used to examine the changes in intraarticular pressure (IAP) of the shoulder joint and the position of the humeral head under various loads to determine the relationship between these parameters. All the soft tissues superficial to the rotator cuff were removed. The position of the humerus relative to the scapula was monitored using an electromagnetic tracking system before and after venting the capsule with 0, 0.5, and 1.0 kg of load applied to the humerus inferiorly in addition to the weight of the arm. Simultaneously, the IAP was monitored using a pressure transducer before venting the capsule. Venting had a significant effect on the position of the humeral head: the positions of the head after venting were significantly lowered in all loading conditions. The average IAP was - 76 cm H2O without load, and the value decreased in a linear fashion with increased load; the correlations were significant in four of six shoulders without dislocation. The correlations were less significant between the pressure and the position, and there were no significant correlations between the load and the position. IAP, which is determined primarily by the load applied, is important to stabilize the shoulder inferiorly. Because IAP is intimately related to the external load and the response is specific to individuals, examination of IAP response to external load may be helpful in characterizing various instabilities of the shoulder.

Original languageEnglish (US)
Pages (from-to)406-413
Number of pages8
JournalArthroscopy
Volume9
Issue number4
StatePublished - 1993

Fingerprint

Pressure
Humeral Head
Humerus
Capsules
Pressure Transducers
Shoulder Dislocation
Bursitis
Scapula
Shoulder Joint
Rotator Cuff
Electromagnetic Phenomena
Arm
Head
Weights and Measures

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine
  • Surgery

Cite this

Itoi, E., Motzkin, N. E., Browne, A. O., Hoffmeyer, P., Morrey, B. F., & An, K. N. (1993). Intraarticular pressure of the shoulder. Arthroscopy, 9(4), 406-413.

Intraarticular pressure of the shoulder. / Itoi, E.; Motzkin, N. E.; Browne, A. O.; Hoffmeyer, P.; Morrey, B. F.; An, K. N.

In: Arthroscopy, Vol. 9, No. 4, 1993, p. 406-413.

Research output: Contribution to journalArticle

Itoi, E, Motzkin, NE, Browne, AO, Hoffmeyer, P, Morrey, BF & An, KN 1993, 'Intraarticular pressure of the shoulder', Arthroscopy, vol. 9, no. 4, pp. 406-413.
Itoi E, Motzkin NE, Browne AO, Hoffmeyer P, Morrey BF, An KN. Intraarticular pressure of the shoulder. Arthroscopy. 1993;9(4):406-413.
Itoi, E. ; Motzkin, N. E. ; Browne, A. O. ; Hoffmeyer, P. ; Morrey, B. F. ; An, K. N. / Intraarticular pressure of the shoulder. In: Arthroscopy. 1993 ; Vol. 9, No. 4. pp. 406-413.
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