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Intracapsular pressure and loosening of hip prostheses. Preoperative measurements in 18 hips

Robertsson, Otto LU ; Wingstrand, Hans LU ; Kesteris, Uldis LU ; Jonsson, Kjell LU and Önnerfält, Rolf LU (1997) In Acta Orthopaedica Scandinavica 68(3). p.231-234
Abstract
We measured the intracapsular pressure preoperatively in 18 hips (17 patients) before revision of a total hip arthroplasty because of aseptic loosening. Distension of the joint capsule was measured with sonography in 13 cases. In extension, the mean intracapsular pressure was 26 (0-60) mmHg, in extension and inward rotation it was 159 (24-280) mmHg, in extension and outward rotation it was 30 (3-67) mmHg and in 45 degrees of flexion it was 12 (0-28) mmHg. A mean of 6 (0.5-20) mL of joint fluid was aspirated after the pressure measurements. Sonography showed increased joint fluid/synovial edema and/or increased capsular thickness, as compared to 34 unrevised, radiographically not loose prosthetic hips, and that the capsular distension... (More)
We measured the intracapsular pressure preoperatively in 18 hips (17 patients) before revision of a total hip arthroplasty because of aseptic loosening. Distension of the joint capsule was measured with sonography in 13 cases. In extension, the mean intracapsular pressure was 26 (0-60) mmHg, in extension and inward rotation it was 159 (24-280) mmHg, in extension and outward rotation it was 30 (3-67) mmHg and in 45 degrees of flexion it was 12 (0-28) mmHg. A mean of 6 (0.5-20) mL of joint fluid was aspirated after the pressure measurements. Sonography showed increased joint fluid/synovial edema and/or increased capsular thickness, as compared to 34 unrevised, radiographically not loose prosthetic hips, and that the capsular distension correlated to intracapsular pressure during extension and inward rotation. We conclude that the intracapsular pressure usually is elevated in a hip joint with loose prosthetic components, that the intracapsular pressure varies with the position of the hip and that capsular distension reflects increased intracapsular pressure. The increased and often very high pressure, varying during gait, may pump debris away from the joint along the interfaces and even by itself cause osteolysis and loosening. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Acta Orthopaedica Scandinavica
volume
68
issue
3
pages
231 - 234
publisher
Taylor & Francis
external identifiers
  • pmid:9246982
  • scopus:0030857287
ISSN
0001-6470
DOI
10.3109/17453679708996690
language
English
LU publication?
yes
id
ff64ea42-1455-463a-b2bf-e1c98bbeb699 (old id 1112391)
date added to LUP
2008-07-22 10:33:58
date last changed
2017-08-13 04:15:11
@article{ff64ea42-1455-463a-b2bf-e1c98bbeb699,
  abstract     = {We measured the intracapsular pressure preoperatively in 18 hips (17 patients) before revision of a total hip arthroplasty because of aseptic loosening. Distension of the joint capsule was measured with sonography in 13 cases. In extension, the mean intracapsular pressure was 26 (0-60) mmHg, in extension and inward rotation it was 159 (24-280) mmHg, in extension and outward rotation it was 30 (3-67) mmHg and in 45 degrees of flexion it was 12 (0-28) mmHg. A mean of 6 (0.5-20) mL of joint fluid was aspirated after the pressure measurements. Sonography showed increased joint fluid/synovial edema and/or increased capsular thickness, as compared to 34 unrevised, radiographically not loose prosthetic hips, and that the capsular distension correlated to intracapsular pressure during extension and inward rotation. We conclude that the intracapsular pressure usually is elevated in a hip joint with loose prosthetic components, that the intracapsular pressure varies with the position of the hip and that capsular distension reflects increased intracapsular pressure. The increased and often very high pressure, varying during gait, may pump debris away from the joint along the interfaces and even by itself cause osteolysis and loosening.},
  author       = {Robertsson, Otto and Wingstrand, Hans and Kesteris, Uldis and Jonsson, Kjell and Önnerfält, Rolf},
  issn         = {0001-6470},
  language     = {eng},
  number       = {3},
  pages        = {231--234},
  publisher    = {Taylor & Francis},
  series       = {Acta Orthopaedica Scandinavica},
  title        = {Intracapsular pressure and loosening of hip prostheses. Preoperative measurements in 18 hips},
  url          = {http://dx.doi.org/10.3109/17453679708996690},
  volume       = {68},
  year         = {1997},
}