Ultrasound of the knee during voluntary quadriceps contraction: A technique for detecting otherwise occult effusions
dc.contributor.author | Ike, Robert W. | en_US |
dc.contributor.author | Somers, Emily C. | en_US |
dc.contributor.author | Arnold, Erin L. | en_US |
dc.contributor.author | Arnold, William J. | en_US |
dc.date.accessioned | 2010-06-02T19:49:15Z | |
dc.date.available | 2011-03-01T16:26:43Z | en_US |
dc.date.issued | 2010-05 | en_US |
dc.identifier.citation | Ike, Robert W.; Somers, Emily C.; Arnold, Erin L.; Arnold, William J. (2010). "Ultrasound of the knee during voluntary quadriceps contraction: A technique for detecting otherwise occult effusions." Arthritis Care & Research 62(5): 725-729. <http://hdl.handle.net/2027.42/75770> | en_US |
dc.identifier.issn | 2151-464X | en_US |
dc.identifier.issn | 2151-4658 | en_US |
dc.identifier.uri | https://hdl.handle.net/2027.42/75770 | |
dc.description.abstract | Objective To describe 1) a technique that can detect synovial effusions not seen on static ultrasound (US) examination and 2) the characteristics of patients with knee osteoarthritis (OA) for whom this technique proved useful. Methods From reviewed records of 76 patients with knee OA (112 knees) that we had seen for US-guided injections over a defined period, we found 45 knees with no detectable effusion on static US, of which 18 (14 patients) showed fluid when scanned during voluntary quadriceps contraction. For all patients, we had recorded effusion features (physical examination, presence and size on US), and success of joint entry was determined by getting synovial fluid and/or seeing an air echo or inflow of injected material. Results The 14 patients we studied were obese (mean ± SEM body mass index 32.7 ± 2.3 kg/m 2 ; 3 morbidly obese), with moderate to severe OA by radiography in most (Kellgren/Lawrence class 3 or 4 in 10 of 14 knees for which radiographs were available). The suprapatellar synovial space seen by US was small (mean ± SEM depth 0.38 ± 0.04 cm). Arthrocentesis obtained 0.5–16 ml of synovial fluid (mean ± SEM 2.9 ± 0.6 ml), which correlated with the depth of effusion as seen on US with the quadriceps in maximum contraction (Spearman's Ρ = 0.5597, P = 0.0157). In 4 knees where arthrocentesis failed to retrieve fluid, we observed at injection the inflow of material and a linear air echo. Conclusion US of the knee during voluntary quadriceps contraction can find effusions not detectable on static US. Such effusions provide targets for accurate aspiration and injection that would not be appreciated with static US. | en_US |
dc.format.extent | 124421 bytes | |
dc.format.extent | 3118 bytes | |
dc.format.mimetype | application/pdf | |
dc.format.mimetype | text/plain | |
dc.publisher | John Wiley & Sons, Inc. | en_US |
dc.subject.other | Life and Medical Sciences | en_US |
dc.title | Ultrasound of the knee during voluntary quadriceps contraction: A technique for detecting otherwise occult effusions | en_US |
dc.type | Article | en_US |
dc.rights.robots | IndexNoFollow | en_US |
dc.subject.hlbsecondlevel | Geriatrics | en_US |
dc.subject.hlbtoplevel | Health Sciences | en_US |
dc.description.peerreviewed | Peer Reviewed | en_US |
dc.contributor.affiliationum | University of Michigan, Ann Arbor ; Rheumatology Division, University of Michigan Medical Center, 3918 Taubman Center, 1500 East Medical Center Drive, Ann Arbor, MI 48109-0358 | en_US |
dc.contributor.affiliationum | University of Michigan, Ann Arbor | en_US |
dc.contributor.affiliationother | Illinois Bone and Joint Institute, Morton Grove | en_US |
dc.contributor.affiliationother | Illinois Bone and Joint Institute, Morton Grove | en_US |
dc.identifier.pmid | 20461790 | en_US |
dc.description.bitstreamurl | http://deepblue.lib.umich.edu/bitstream/2027.42/75770/1/20047_ftp.pdf | |
dc.identifier.doi | 10.1002/acr.20047 | en_US |
dc.identifier.source | Arthritis Care & Research | en_US |
dc.owningcollname | Interdisciplinary and Peer-Reviewed |
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