Search results for "Suction."
showing 10 items of 70 documents
TRANSCRANIAL DIRECT CURRENT STIMULATION ENHANCES SUCKING OF A LIQUID BOLUS IN HEALTHY HUMANS
2014
Abstract Background Transcranial direct current stimulation (tDCS) is a non-invasive technique used for modulating cortical excitability in vivo in humans. Here we evaluated the effect of tDCS on behavioral and electrophysiological aspects of physiological sucking and swallowing. Methods Twelve healthy subjects underwent three tDCS sessions (anodal, cathodal and sham stimulation) on separate days in a double-blind randomized order. The active electrode was placed over the right swallowing motor cortex. Repeated sucking and swallowing acts were performed at baseline and at 15 and 60 min after each tDCS session and the mean liquid bolus volume ingested at each time point was measured. We also…
Fixed Mydriatic Pupil Associated with an Intraocular Pressure Rise as a Complication of the Implant of a Phakic Refractive Lens (PRL)
2013
We describe a case report of a patient that was implanted with a posterior chamber phakic intraocular lens (Phakic Refractive Lens, PRL) for the correction of moderate myopia and who developed postoperatively a fixed mydriasis compatible with an Urrets-Zavalia Syndrome (UZS). Specifically, a sudden acute increase of IOP in the left eye was observed in the immediate postoperative period. After IOP stabilization, the refractive result was good, but a fixed and mydriatic pupil appeared. This condition led the patient to experience visual discomfort, halos, and glare associated with high levels of higher-order aberrations in spite of the good visual result. A tinted-contact lens was fitted in o…
Is avoidance of surgery possible in patients with perimenopausal ovarian tumors using transvaginal ultrasound and duplex color Doppler sonography?
1993
A total of 108 cases of small perimenopausal ovarian tumors (largest diameter, less than 7 cm) were evaluated by transvaginal sonography and duplex color Doppler sonography; 101 had criteria for benignity and 7 for malignancy. All cysts were punctured and aspirated to avoid unnecessary surgery (benign cases) and establish the cytologic diagnosis as well as to avoid the risk of leakage (malignant cases). Recurrence rate of benign punctured cysts was 25% within 1 year of follow up. No difference in recurrent rate was seen between pre- and postmenopausal patients (19 of 56 cases in the premenopausal group, and five of 28 cases in the postmenopausal group). The larger the cyst, the greater the …
Does the use of fibrin glue prevent seroma formation after axillary lymphadenectomy for breast cancer? A prospective randomized trial in 159 patients.
2010
Background Seroma formation frequently occurs in patients who have undergone axillary lymphadenectomy. The aim of the study was to evaluate the effect of fibrin glue in the prevention of seroma formation after axillary lymphadenectomy. Materials and Methods Hundred fifty-nine breast cancer patients about to undergo quadrantectomy or mastectomy plus axillary lymphadenectomy were enrolled in the study and randomized into two groups. Fibrin glue spray applied to the axillary fossa plus placement of closed suction drainage were used in 80 patients (group A); placement of closed suction drainage was only used in 79 patients (group B). Results Group A patients showed a slight advantage with regar…
Shock control bump design optimization on natural laminar aerofoil
2011
The chapter investigates Shock Control Bumps (SCB) on a Natural Laminar Flow (NLF) aerofoil; RAE 5243 for Active Flow Control (AFC). A SCB approach is used to decelerate supersonic flow on the suction/pressure sides of transonic aerofoil that leads delaying shock occurrence or weakening of shock strength. Such an AFC technique reduces significantly the total drag at transonic speeds. This chapter considers the SCB shape design optimisation at two boundary layer transition positions (0 and 45%) using an Euler software coupled with viscous boundary layer effects and robust Evolutionary Algorithms (EAs). The optimisation method is based on a canonical Evolution Strategy (ES) algorithm and inco…
Large-scale migration synchrony between parasitoids and their host
2015
1. Parasitoids are a valuable group for conservation biological control. In their role as regulators of aphid pests, it is critical that their lifecycle is synchronised with their hosts in both space and time. This is because a synchronised parasitoid community is more likely to strengthen the overall conservation biological control effect, thus damping aphid numbers and preventing potential outbreaks. One component of this host–parasitoid system was examined, that of migration, and the hypothesis that peak summer parasitoid and host migrations are synchronised in time was tested. 2. Sitobion avenae Fabricius and six associated parasitoids were sampled from 1976 to 2013 using 12.2-m suction…
CO2flux measurements in volcanic areas using the dynamic concentration method: Influence of soil permeability
2006
[1] In order to evaluate the influence of soil permeability on soil CO2 flux measurements performed with the dynamic concentration method, several tests were carried out using soils characterized by different permeability values and flow rates. A special device was assembled in the laboratory to create a one-dimensional gas flow through a soil of known permeability. Using the advective-diffusion theory, a physical model to predict soil concentration gradients was also developed. The calculated values of CO2 concentrations at different depths were compared with those measured during the tests and a good agreement was found. Four soils with different gas permeability (3.6 × 10−2 to 1.23 × 102…
Under Pressure: Comparison of Aspiration Techniques for Endovascular Mechanical Thrombectomy.
2018
BACKGROUND AND PURPOSE: Blood flow should be interrupted during mechanical thrombectomy to prevent embolization of clot fragments. The purpose of our study was to provide a handy overview of the most common aspiration devices and to quantify their flow characteristics. MATERIALS AND METHODS: We assessed volumetric flow rates generated by a 60-mL VacLok vacuum pressure syringe, a Pump MAX aspiration pump, and a Dominant Flex suction pump connected to the following: 1) an 8F long sheath, 2) an 8F balloon-guide catheter, 3) an ACE 64 distal aspiration catheter, and 4) an AXS Catalyst 6 Distal Access Catheter. We used a water/glycerol solution, which was kept at a constant temperature of 20°C (…
Muskelveränderungen durch Saugdrainagen Eine rasterelektronenmikroskopische, transmissionselektronenmikroskopische, lichtmikroskopische und morphomet…
1983
In die Ruckenmuskulatur von 22 mannlichen, ausgewachsenen Wistar-Ratten wurde ein Drainagesystem eingelegt und die Wirkung des Unterdruckes auf die Muskulatur analysiert. Nach kurzester Liegezeit waren die Drainagesysteme durch ein Koagulat verschlossen. Im Unterschied zu den Kontrolltieren, bei denen sich lediglich Fibrin-Gerinnsel und Erythrozyten-Konglomerationen fanden, sahen wir im Rasterelektronenmikroskop bei den mit Unterdruck behandelten Tieren intakte Muskeln im Lumen der Drainage. Fibrin, Muskelfasern und Erythrozyten bildeten einen Verschluspfropf, der das funktioneile System der Saugdrainage unwirksam werden lies. Veranderungen in drainagefernen Muskelbezirken konnten lichtmikr…
Mechanical insufflation-exsufflation vs. tracheal suctioning via tracheostomy tubes for patients with amyotrophic lateral sclerosis: a pilot study.
2003
To compare the effects of mechanical insufflation-exsufflation vs. suctioning via tracheostomy tubes on respiratory variables for six amyotrophic lateral sclerosis patients.In this prospective crossover study, six consecutive patients with amyotrophic lateral sclerosis who required continuous mechanical ventilation via tracheostomy tubes and developed chest infections underwent measurement of pulse oxyhemoglobin saturation (SpO2), peak inspiratory pressure (PIP), mean airway pressure (Pawm), and work of breathing performed by the ventilator (WOBv) at baseline and 5 and 30 min after tracheal suctioning and 5 min after mechanical insufflation-exsufflation.The baseline values were 93.50 +/- 2.…