Abstract
BackgroundWhile a relation between pain and intracapsular pressure in the hip joint has previously been reported by some of the present authors, a newly published study including patients with severe osteoarthritis was not able to confirm this finding. This stimulated us to investigate the role of short rotators in relation to intracapsular pressure and pain in osteoarthritic hips.MethodsWe measured the intracapsular hydrostatic pressure peroperatively in 25 total hip arthroplasty patients with severe osteoarthritis in various positions of the hip joint before and after short rotator release, and correlated these pressures to pain.ResultsRelease of the short rotators did not change the intracapsular pressure in any position except in 45° flexion, in which the pressure increased (p = 0.002). We found no correlation between intracapsular pressure and pain before or after short rotator release.ConclusionWe could not show that the rotators directly affected the pressure nor could we find a relation between pressure and pain.
Highlights
While a relation between pain and intracapsular pressure in the hip joint has previously been reported by some of the present authors, a newly published study including patients with severe osteoarthritis was not able to confirm this finding
Robertsson et al [1] reported a correlation between intracapsular/hydrostatic pressure (ICP) and pain in osteoarthritis (OA)
The aim of our study was to investigate if perioperative release of the short rotator tendons in osteoarthritic hips affects ICP, and if there is a correlation between ICP and pain either before or after release of the short rotators
Summary
While a relation between pain and intracapsular pressure in the hip joint has previously been reported by some of the present authors, a newly published study including patients with severe osteoarthritis was not able to confirm this finding. This stimulated us to investigate the role of short rotators in relation to intracapsular pressure and pain in osteoarthritic hips. In that study the findings of Robertsson et al [1], and Goddard and Gosling [2] of correlation of pressure and pain could not be confirmed This might have been due to differences in ICP measurement technique [3]. Our hypothesis was that release of short rotators might decompress the hip joint capsule and subsequently result in lower ICP and explain the (page number not for citation purposes)
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