RESUMO
The emission dynamics of a GaAs microcavity at different angles of observation with respect to the sample normal under conditions of nonresonant picosecond-pulse excitation is measured. At sufficiently high excitation densities, the decay time of the lower polariton emission increases with the polariton wavevector; at low excitation densities the decay time is independent of the wavevector. The effect of additional nonresonant continuous illumination on the emission originating from the bottom of the lower polariton branch is investigated. The additional illumination leads to a substantial increase in the emission intensity (considerably larger than the intensity of the photoluminescence excited by this illumination alone). This fact is explained in terms of acceleration of the polariton relaxation to the radiative states due to scattering by charge carriers created by the additional illumination. The results obtained show that, at large negative detunings between the photon and exciton modes, polariton-polariton and polariton-free carrier scattering are the main processes responsible for the filling of states near the bottom of the lower polariton branch.
Assuntos
Raquianestesia/métodos , Aorta Abdominal/cirurgia , Idoso , Analgésicos Opioides , Raquianestesia/efeitos adversos , Anestésicos Locais , Cateterismo/métodos , Hemodinâmica/efeitos dos fármacos , Humanos , Lidocaína , Pessoa de Meia-Idade , Monitorização Intraoperatória , Morfina , Punção Espinal/métodos , TrimecaínaAssuntos
Transtorno do Deficit de Atenção com Hiperatividade/reabilitação , Traumatismos do Nascimento/reabilitação , Paralisia Cerebral/reabilitação , Estâncias para Tratamento de Saúde , Terapia a Laser , Pontos de Acupuntura , Transtorno do Deficit de Atenção com Hiperatividade/fisiopatologia , Traumatismos do Nascimento/fisiopatologia , Paralisia Cerebral/fisiopatologia , Criança , Terapia Combinada , Eletromiografia , Humanos , Raios Infravermelhos/uso terapêutico , Espasticidade Muscular/fisiopatologia , Espasticidade Muscular/reabilitação , Indução de Remissão , Fatores de TempoAssuntos
Anestesia Epidural , Coluna Vertebral/cirurgia , Humanos , Masculino , Pessoa de Meia-Idade , Fatores de TempoRESUMO
To facilitate nasotracheal intubation a conductor made from esophageal tube is recommended. The advantage of this conductor is that the tube could be directed into the trachea without intubation forceps. No special material is required and it is available for any anesthesiologist.
Assuntos
Intubação Intratraqueal/instrumentação , Humanos , NarizRESUMO
Local anesthesia of the brachial plexus by interscalenic approach was a cause of total spinal blockade due to the administration of a local anesthetic into subarachnoid space. To prevent this it is necessary to administer a test dose of a local anesthetic with pre-aspiration of the liquor with a syringe. Intensive care procedures should be aimed at maintenance of adequate hemodynamics and gas exchange and to liquidation of circulating blood volume deficiency.
Assuntos
Anestesia Local/efeitos adversos , Plexo Braquial , Bloqueio Nervoso/efeitos adversos , Paralisia/etiologia , Anestésicos Locais/administração & dosagem , Humanos , Masculino , Pessoa de Meia-Idade , Espaço SubaracnóideoRESUMO
Patients who have been long exposed to ultrasound and high-frequency currents at work are likely to develop diseases of the peripheral nervous system and thus the risk of nerve damage during conduction anesthesia. Profound examination of the peripheral nervous system before surgery is necessary in such patients. In patients with this pathology general anesthesia will be the technique of choice during surgery on the lower extremities.
Assuntos
Anestesia por Condução/efeitos adversos , Campos Eletromagnéticos , Exposição Ocupacional , Doenças do Sistema Nervoso Periférico/etiologia , Ultrassom , Adulto , Feminino , HumanosAssuntos
Anestesia Epidural/efeitos adversos , Anestesia Epidural/métodos , Dura-Máter/lesões , Hematoma/etiologia , Hematoma/cirurgia , Humanos , Masculino , Pessoa de Meia-Idade , Complicações Pós-Operatórias/etiologia , Complicações Pós-Operatórias/cirurgia , Reoperação , Espaço Retroperitoneal , Doenças da Coluna Vertebral/etiologia , Doenças da Coluna Vertebral/cirurgia , Punção Espinal/efeitos adversos , Fatores de TempoRESUMO
Pulmonary surgery performed under epidural anesthesia (EA) combined with transcranial electrical anesthesia (TEA) was characterized by minimum adverse hemodynamic reactions, typical of EA alone, and reduced overall dose of the local anesthetic with minimum volume of the infusion therapy and adequate anesthetic protection. The absence of marked hemodynamic reactions in this type of combined anesthesia made it possible to use it during pulmonary surgery in the most severely ill patients whose cardiovascular system is already compromised by the primary pulmonary disease.