| Biphasic threat to femoral head perfusion in abduction: arterial hypoperfusion and venous congestion. | |
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MedLine Citation:
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PMID: 20449735 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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BACKGROUND: Hip abduction can cause avascular necrosis (AVN) of the femoral head in infants. OBJECTIVE: To compare the US perfusion pattern of femoral head cartilage in neutral position with that in different degrees and duration of abduction, testing the venous congestion theory of post-abduction ischemia. MATERIALS AND METHODS: In 20 neonates, the Doppler flow characteristics of the posterosuperior (PS) branch of the femoral head cartilage feeding vessels were evaluated in neutral and at 30 degrees, 45 degrees, and 60 degrees abduction. In three neonates the leg was held in 45-degree abduction and flow was assessed at 5, 10, and 15 min. RESULTS: Male/female ratio was 11/9 with a mean age of 1.86 +/- 0.7 weeks. The peak systolic velocities (PSV) declined in all three degrees of abduction. After 15 min of 45-degree abduction, the mean PSV declined and showed an absent or reversed diastolic component and undetectable venous return. No perfusion was detected at 60-degree abduction. CONCLUSION: Abduction-induced femoral head ischemia is biphasic and degree- and duration-dependent. In phase I there is arterial hypoperfusion and in phase II there is venous congestion. A new pathogeneses for femoral head ischemia is offered. |
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Authors:
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David K Yousefzadeh; Diego Jaramillo; Neil Johnson; Kirk Doerger; Christopher Sullivan |
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Publication Detail:
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Type: Journal Article Date: 2010-05-07 |
Journal Detail:
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Title: Pediatric radiology Volume: 40 ISSN: 1432-1998 ISO Abbreviation: Pediatr Radiol Publication Date: 2010 Sep |
Date Detail:
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Created Date: 2010-08-16 Completed Date: 2010-12-08 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0365332 Medline TA: Pediatr Radiol Country: Germany |
Other Details:
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Languages: eng Pagination: 1517-25 Citation Subset: IM |
Affiliation:
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Department of Radiology, Comer Children's Hospital, Chicago, IL, USA. dyousefz@radiology.bsd.uchicago.edu |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Blood Flow Velocity Cartilage, Articular / blood supply*, ultrasonography* Female Femur Head / blood supply*, ultrasonography* Femur Head Necrosis / etiology, ultrasonography* Humans Hyperemia / etiology, ultrasonography* Infant, Newborn Ischemia / etiology, ultrasonography* Male Posture Ultrasonography, Doppler, Color* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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