Clinical orthopaedics and related research
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Clin. Orthop. Relat. Res. · Sep 2011
Does norepinephrine influence pain behavior mediated by dorsal root ganglia?: a pilot study.
Postganglionic neurons in the sympathetic nervous system reportedly are involved in lumbar radicular pain and release norepinephrine (NE), a neurotransmitter. Increased numbers of sympathetic nerve fibers have been found in dorsal root ganglion (DRG) neurons in a root constriction model. Whether this is a reasonable model for pain, however, is unclear ⋯ An α(2)-antagonist may be an appropriate agent for trials to treat lumbar radicular pain.
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Clin. Orthop. Relat. Res. · Sep 2011
A complication-based learning curve from 200 reverse shoulder arthroplasties.
Reported early complication rates in reverse total shoulder arthroplasty have widely varied from 0% to 75% in part due to a lack of standard inclusion criteria. In addition, it is unclear whether revision arthroplasty is associated with a higher rate of complications than primary arthroplasty. ⋯ Level IV, therapeutic study. See the guidelines online for a complete description of level of evidence.
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Clin. Orthop. Relat. Res. · Sep 2011
Multicenter StudyRelationships of the lateral femoral cutaneous nerve to bony landmarks.
The lateral femoral cutaneous nerve (LFCN) can be at risk during, for example, the insertion of pins in the anterior superior iliac spine (ASIS) during external fixation of the pelvis, total hip arthroplasty through a direct anterior approach, open surgery for impingement in the hip through an anterior approach, and periacetabular osteotomy. During surgery, the surgeon usually assumes the location of the LFCN by using the ASIS as a landmark. ⋯ The LFCN may emerge from the lateral border of the psoas major above or below the IC. The AC/AB ratio can help surgeons to find the LFCN in patients with different body types.
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Clin. Orthop. Relat. Res. · Sep 2011
Frequency, risk factors, and prognosis of prolonged delirium in elderly patients after hip fracture surgery.
Delirium in elderly patients after hip fracture surgery is believed to be a transient event, although it frequently lasts for more than 4 weeks. ⋯ Level II, prognostic study. See Guidelines for Authors for a complete description of levels of evidence.
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Clin. Orthop. Relat. Res. · Sep 2011
Reverse total shoulder arthroplasty improves function in cuff tear arthropathy.
Early failure due to glenoid loosening with anatomic total shoulder arthroplasty in patients with severe rotator cuff deficiency led to the development of the reverse ball-and-socket shoulder prosthesis. The literature reports improved short-term pain and function scores following modern reverse total shoulder arthroplasty (RTSA) in patients with cuff tear arthropathy (CTA). ⋯ Level IV, therapeutic study. See Guidelines for Authors for a complete description of levels of evidence.