ABSTRACT
We present a new global QCD analysis of parton distribution functions, allowing for possible intrinsic charm (IC) contributions in the nucleon inspired by light-front models. The analysis makes use of the full range of available high-energy scattering data for Q^{2}â³1 GeV^{2} and W^{2}â³3.5 GeV^{2}, including fixed-target proton and deuteron cross sections at lower energies that were excluded in previous global analyses. The expanded data set places more stringent constraints on the momentum carried by IC, with ⟨x⟩_{IC} at most 0.5% (corresponding to an IC normalization of â¼1%) at the 4σ level for Δχ^{2}=1. We also critically assess the impact of older EMC measurements of F_{2}^{c} at large x, which favor a nonzero IC, but with very large χ^{2} values.
ABSTRACT
El hematoma epidural espinal secundario a anestesia neuroaxial es una complicación grave, aunque poco frecuente. La mayoría de los casos se asocia a tratamiento anticoagulante o circunstancias que favorezcan el sangrado. Por las graves secuelas secundarias a la compresión medular se considera una urgencia quirúrgica, siendo crucial en su pronóstico la precocidad en la descompresión medular. Presentamos un caso de hematoma epidural espinal dorsolumbar asociado a anestesia intradural y analgesia epidural en una paciente con tromboprofilaxis con heparina de bajo peso molecular, con recuperación espontánea con tratamiento conservador(AU)
Spinal epidural haematoma after neuroaxial anaesthesia is a rare but serious complication. Most cases are attributed to anticoagulant therapy or bleeding tendency. It presents as an acute spinal cord compression and usually requires emergency surgical decompression. The interval between the onset of clinical signs and surgical evacuation is very important, influencing the neurological prognosis. We report a case of a spinal epidural haematoma after epidural analgesia in a patient who was treated with low molecular weight heparin for thrombo-prophylaxis in the perioperative period. In some cases, such as the one reported here, good neurological recovery can be achieved with conservative management(AU)
Subject(s)
Humans , Male , Female , Paraparesis/chemically induced , Anesthesia, Epidural/adverse effects , Anesthesia, Epidural/methods , Anesthesia, Epidural , Analgesia, Epidural , Hematoma, Epidural, Spinal/chemically induced , Hematoma, Epidural, Spinal/complications , Spinal Cord Compression/chemically induced , Spinal Cord Compression/complications , Heparin, Low-Molecular-Weight/therapeutic use , Spinal Cord Compression , Paraparesis/complications , Analgesia, Epidural/methods , Analgesia, Epidural/trendsABSTRACT
Spinal epidural haematoma after neuroaxial anaesthesia is a rare but serious complication. Most cases are attributed to anticoagulant therapy or bleeding tendency. It presents as an acute spinal cord compression and usually requires emergency surgical decompression. The interval between the onset of clinical signs and surgical evacuation is very important, influencing the neurological prognosis. We report a case of a spinal epidural haematoma after epidural analgesia in a patient who was treated with low molecular weight heparin for thrombo-prophylaxis in the perioperative period. In some cases, such as the one reported here, good neurological recovery can be achieved with conservative management.
Subject(s)
Analgesia, Epidural/adverse effects , Anesthesia, Spinal/adverse effects , Hematoma, Epidural, Spinal/etiology , Paraparesis/etiology , Postoperative Complications/etiology , Spinal Cord Compression/etiology , Subarachnoid Hemorrhage/etiology , Aged , Anesthesia, Epidural/adverse effects , Anticoagulants/adverse effects , Arthroplasty, Replacement, Knee , Diagnostic Errors , Enoxaparin/adverse effects , Female , Hematoma, Epidural, Spinal/chemically induced , Humans , Lumbar Vertebrae , Magnetic Resonance Imaging , Pain, Postoperative/drug therapy , Postoperative Complications/diagnosis , Remission, Spontaneous , Subarachnoid Hemorrhage/chemically induced , Thoracic Vertebrae , Thrombophlebitis/diagnosisABSTRACT
Predictions of isospin asymmetries of valence and sea distributions are presented which are generated by QED leading Oalpha photon bremsstrahlung effects. Together with isospin violations arising from nonperturbative hadronic sources (such as quark and target mass differences) as well as with even a conservative contribution from a strangeness asymmetry (s not equal to s), the discrepancy between the large NuTeV anomaly result for sin(2Theta(w)) and the world average of other measurements is removed.
ABSTRACT
The authors describe a case of myocardiopathy, during the third trimester of pregnancy, in a patient without any significant previous cardiac history nor associated obstetrical pathology. The clinical course was uneventful without sequelae. The clinical importance of peri-partum myocardiopathy, especially regarding myocardial sequelae, imposes a differential diagnosis and an analysis of the current state of this pathological process.
