Effects of reduction of inspired oxygen fraction or application of positive end-expiratory pressure after an alveolar recruitment maneuver on respiratory mechanics, gas exchange, and lung aeration in dogs during anesthesia and neuromuscular blockade.

Objective: To evaluate the effectiveness of reduction of inspired oxygen fraction (Fio(2)) or application of positive end-expiratory pressure (PEEP) after an alveolar recruitment maneuver (ARM) in minimizing anesthesia-induced atelectasis in dogs.

Animals: 30 healthy female dogs.

Procedures: During anesthesia and neuromuscular blockade, dogs were mechanically ventilated under baseline conditions (tidal volume, 12 mL/kg; inspiratory-to-expiratory ratio, 1:2; Fio(2), 1; and zero end-expiratory pressure [ZEEP]).

Use of the oxygen content-based index, Fshunt, as an indicator of pulmonary venous admixture at various inspired oxygen fractions in anesthetized sheep.

Objective: To evaluate the use of the oxygen content-based index, Fshunt, as an indicator of venous admixture (Qs/Qt) at various fractions of inspired oxygen (FIO(2)s) in anesthetized sheep undergoing Flung or 2-lung ventilation. Animals-6 healthy adult female sheep.

Procedures: Sheep were anesthetized and administered 5 different FIO(2)s (0.

Comparison of intra-operative analgesia provided by intravenous regional anesthesia or brachial plexus block for pancarpal arthrodesis in dogs.

The aim of this study was to compare intravenous regional anesthesia (IVRA) and brachial plexus block (BPB) for intra-operative analgesia in dogs undergoing pancarpal arthrodesis (PA). Twenty dogs scheduled for PA were intramuscularly sedated with acepromazine (0.03 mg/kg), general anesthesia was intravenously (IV) induced with thiopental (10 mg/kg) and, after intubation, maintained with isoflurane in oxygen.

Effects of two fractions of inspired oxygen on lung aeration and gas exchange in cats under inhalant anaesthesia.

Objective: To compare the effects of two fractions of inspired oxygen (FiO(2)) (0.4 and 1) on lung aeration and gas exchange during general anaesthesia in cats.

Study Design: Randomized, blinded, controlled study.

Alveolar recruiting maneuver in dogs under general anesthesia: effects on alveolar ventilation, gas exchange, and respiratory mechanics.

The aim of this study was to evaluate the effects of a recruiting maneuver (RM) on lung aeration, gas exchange, and respiratory mechanics during general anesthesia in mechanically ventilated dogs. A thoracic computed tomography (CT) scan, an arterial blood sample, and measurement of respiratory mechanics were performed 10 min before (baseline) and both 5 and 30 min after a vital capacity RM in 10 dogs under general anesthesia. The RM was performed by inflating the lung at 40 cm H(2)O for 20 s.

First Mass-resolved Measurement of High-Energy Cosmic-Ray Antiprotons.

We report new results for the cosmic-ray antiproton-to-proton ratio from 3 to 50 GeV at the top of the atmosphere. These results represent the first measurements, on an event-by-event basis, of mass-resolved antiprotons above 18 GeV. The results were obtained with the NMSU-WIZARD/CAPRICE98 balloon-borne magnet spectrometer equipped with a gas-RICH (Ring-Imaging Cerenkov) counter and a silicon-tungsten imaging calorimeter.

Curdlan sulfate (CRDS) in a 21-day intravenous tolerance study in human immunodeficiency virus (HIV) and cytomegalovirus (CMV) infected patients: indication of anti-CMV activity with low toxicity.

This study evaluated tolerance (and possible efficacy) for 21 days of i.v. administration at three dose levels of curdlan sulfate (CRDS) (a semisynthetic sulfated polysaccharide), administered over 30 minutes, in HIV and CMV (in some cases) infected individuals with CD4 levels < 500 cells/mm3.

A phase II controlled study of a combination of the immune modulator, lentinan, with didanosine (ddI) in HIV patients with CD4 cells of 200-500/mm3.

This study was carried out to assess the safety and efficacy of a combination of lentinan, an immune modulator, and didanosine (ddI) in a controlled study in HIV positive patients with CD4 levels of 200-500 cells/mm3. Didanosine was administered to HIV patients at doses of 400 mg/day (po) for six weeks (bid), then 2 mg of lentinan i.v.

When an employee is HIV positive.

The occupational health nurse is the primary workplace educator in the HIV pandemic. The policies and methods used to manage the employee with HIV must protect the confidentiality of the employee without discrimination. The occupational health nurse has a unique responsibility to monitor the disease progression and respond with appropriate recommendations for psychological support, AIDS resources, employee medical leave, and disability benefits.

[Biomechanical models of the human skull: stability of various segments in three simulations].

Three simulations by a computer model of human skull, implemented on finite elements and virtual works principles, were performed by a 15 Kg loading of the structure according rules of mechanical stresses of chewing. First model had all elements in place, second was without vault and third was without orbital walls. Stability of the structure was evaluated in terms of "instability coefficient" as an index of sum of moduli and number of considered nodes such moduli give spatial displacement of nodes after loading and deformation of shell elements.

[Sleep in a case of hemiballism].

Sleep spindles abnormalities in extrapyramidal disorders have already been reported, but in the unilateral syndromes the data are unclear and inconclusive. In the attempt to clarify the problem we describe nocturnal sleep in a patient with hemiballism due to an ischemic damage of the subthalamic nucleus. The patient improved after one month haloperidol therapy and her unilateral (right) hyperkinesias disappeared.

[Biomechanical simulation model of the developmental morphology of the human skull. Further observations on the model construction].

The implementation of a software simulation of a biomechanical model of the human skull, requires a high complexity construction made by a different ellipsoids and planes. At present our model is made by a facial, post-facial, occipital and palatal ellipsoids, a basal plane with a hole, walls of the nasal cavity and conic walls of the orbital cavities. Dimension of the model resemble closely an adult human skull.

[Biomechanical model simulating the evolutionary morphology of the human cranium. Preliminary note].

A simulation strategy as been pointed in order to evaluate the fate of the chewing stresses exerting at the molars. The human skull's structure is considered as analog of a built-up arch and/or vault system well adapted for such mechanical fitting. The shallow shell routine of Ices-STRUDL program was worked out.