RESUMEN

Quantum speed limits set an upper bound to the rate at which a quantum system can evolve. Adopting a phase-space approach, we explore quantum speed limits across the quantum-to-classical transition and identify equivalent bounds in the classical world. As a result, and contrary to common belief, we show that speed limits exist for both quantum and classical systems. As in the quantum domain, classical speed limits are set by a given norm of the generator of time evolution.

RESUMEN

Chlamydia trachomatis is recognized as a common sexually transmitted cervical pathogen that may be transmitted to the neonate at delivery. Neonatal infection may be manifested as conjunctivitis, pneumonitis or both. Additionally, cervical infection may be related to premature rupture of the membranes and premature delivery. Women registering for prenatal care in the first half of pregnancy were cultured for Chlamydia to further define its role as a cause of perinatal complications and to evaluate a method of preventing transmission to the neonate. Positive cultures were obtained in 33 of 221 women evaluated (14.9%). No significant differences were found in pregnancy or neonatal complications between the groups with positive and negative cultures. Women with positive cultures were treated at 36 weeks' gestation with erythromycin; 18 received an adequate course of therapy. Of these 18, 16 returned with their infants four to eight weeks postpartum. No symptoms of conjunctivitis or pneumonitis were noted at that time, and cultures of the conjunctiva and nasopharynx were negative in all the infants. Thus, surveillance for Chlamydia and treatment late in pregnancy appear to have no adverse impact on pregnancy and effectively block vertical transmission of the organism.

Asunto(s)

Infecciones por Chlamydia/diagnóstico , Complicaciones Infecciosas del Embarazo/diagnóstico , Infecciones por Chlamydia/tratamiento farmacológico , Chlamydia trachomatis , Eritromicina/uso terapéutico , Femenino , Humanos , Recién Nacido , Enfermedades del Recién Nacido/etiología , Masculino , Embarazo , Complicaciones Infecciosas del Embarazo/tratamiento farmacológico , Frotis Vaginal

RESUMEN

In the Australian medical and paramedical fields considerable interest has been stirred by percutaneous rhizolysis, the procedure introduced here by Dr. W. E. Skyrme Rees, M.B., Ch.B., F.R.C.S. The technique itself comes under intensive scrutiny. In theory the technique is a "percutaneous bilateral section of the posterior primary rami", either lumbar or cervical.

RESUMEN

The technique described here has evolved over a period of time in a busy physiotherapy practice. The results have improved so much over the last three years, that 90% of patients referred for cervical traction have been treated successfully. This success is due both to the positioning of the patient and to the use of Varitrak machines, which have made the application much easier, both from a mechanical and relaxant point of view. The positions described are the same for intermittent and fixed traction.