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Showing 1 to 20 of 71 for “"cannula"”.
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Hydrodynamic effects of a cannula in a USP dissolution testing apparatus 2
… system for solid dosage forms. Usually, sampling cannulas are used to take samples manually from the dissolution medium. However, the inserted cannula can alter the normal fluid flow within the vessel and produce different dissolution testing results. The hydrodynamic effects introduced by a …
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Providing Safe Gastric Feedings In Pediatric Patients On High Flow Nasal Cannula Respiratory Support
<p>Purpose: HFNC is used to manage pediatric respiratory distress, but concerns aboutgastric air insufflation and aspiration risk lead to delayed feedings. There is no standardized practice guiding gastric feedings in children on HFNC. This project developed and implemented a decision tree to guide …
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In Vitro and In Silico Study of Deposition on Textured Biomaterials: Towards Biofunctionalization of Ventricular Cannula
… ventricular assist device (LVAD) is the inflow cannula, where emboli are produced. The emboli may be later ingested and ejected from the pump. A widely explored strategy to prevent surface-induced thrombosis in cardiovascular implants is to promote stable endothelium, which is the natural …
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Design and Evaluation of a Novel Method to Noninvasively Estimate Tidal Volumes During Administration of Nasal Cannula Therapy
Administration of nasal cannula therapy tasks providers with periodically monitoring their patients and adjusting settings according to patient needs. Conventionally, providers monitor a patient's oxygen demand using pulse oximetry and a qualitative assessment of the patient's work of breathing. …
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Characterization of a pre-curved needle for use in distal tip manipulation mechanism
… pre-curved stylet from a concentric straight cannula. Analytical models were developed to (1) understand what material properties are required to recover from the imposed strains, (2) compare stylet stiffness relative to each other and the cannulas, and (3) calculate the deployment and …
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A review of the use of high flow nasal cannula oxygen therapy in hospitalized children at a regional hospital in the Cape Town Metro, South Africa
Background: High-flow nasal cannula oxygen (HFNC) is a non-invasive alternative to nasal continuous positive pressure oxygen (CPAP) therapy for infants and children requiring respiratory support. There is a paucity of literature to support its use in children, with no published data from …
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A Multi-Scale CFD Analysis of Patient-Specific Geometries to Tailor LVAD Cannula Implantation Under Pulsatile Flow Conditions: an investigation aimed at reducing stroke incidence in LVADs
… flow conditions resulting from varying the VAD cannula implantation location and angle of incidence of the anastomosis to the ascending aorta based on a patient-specific geometry obtained from CT scans. The multi-scale computation consists of a 0D lumped parameter model (LPM) of the circulation …
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Drive train improvements and performance evaluation of a robotically steered needle
… stylet by retracting it into a concentric outer cannula, and re-deploying it at a different position. A drive mechanism was previously designed to actuate the cannula and stylet motions. While successfully demonstrating the concept, the previous prototype used a screw-spline mechanism that had a …
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Effect of nutrient intake on pigs treated with porcine somatotropin
… allow for infusion of feed into the stomach, a cannula was implanted. The implantation of a cannula into the greater curvature of the stomach was well tolerated by these animals. Hyperalimentation to 120% of the cannulated, ad libitum fed control animals depressed feed efficiency (gain:feed). …
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Characterization of a pre-curved stylet distal tip manipulation mechanism for use in volume targeting
… a pre-curved stylet from a concentric stiff cannula that is capable of both translational and rotational motions allows the device to achieve targeting of volumes through a single needle insertion into a soft medium. Each mechanism component was analyzed for its motion, and separate …
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Image-guided robots for dot-matrix tumor ablation
… stylet by retracting it into a concentric outer cannula, and re-deploying it at different axial and rotational cannula positions. The proximal end of the cannula is attached to the distal end of a screw-spline that enables it to be translated and rotated with respect to the casing. Translation of …
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The Development of a Vascularly Implanted Prosthetic Endocrine Pancreas
… cut-off 100K Daltons), with a 10 cm polyethylene cannula attached at either end. Hollow fibre/cannula junctions were potted into the polyethylene shell via a disc of PVC tubing and U/V-cured dental adhesive. The secretory capagity of prototype units was studied in vitro using methylene blue, …
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Indication for and outcomes of continuous Positive Airways Pressure (CPAP) and High Flow Nasal Cannula oxygen therapy (HFNC) in children admitted to Red Cross War Memorial's Hospital (RCWMCH) excluding those with primary respiratory aetiologies
… Airway Pressure (nCPAP) and High Flow Nasal Cannula oxygen therapy (HFNC) are non-invasive ventilation (NIV) modalities appropriate for children in developing countries. There is minimal literature describing nCPAP and HFNC use in children with respiratory compromise secondary to …
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A study to determine the efficacy of A 0,2 μm air venting final in-line intravenous filter in reducing the complications of intravenous therapy
… evaluation of filters, skin at the site of cannulation immediately prior to removal of cannulae, and cannula tips was performed. Particle size analyses of the commonly used intravenous infusion fluids and medicines was also carried out. The incidence of phlebitis was significantly reduced by …
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CNS Penetration of Tyrosine Kinase Inhibitors in Mouse Models
… used as a reference point to place microdialysis cannula does not appear on images derived by magnetic resonance imaging (MRI), the imaging method used to identify the size and location of the spontaneously arising tumors. Thus, we realized that a new technique to implant the microdialysis guide …
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Toll-like receptor mediated responses to adsorbed damage-associated molecular patterns on biomaterial surfaces
… polymers, including insulin infusion cannulas. The in vitro data showed that adsorbed DAMPs on polymeric surfaces, both alone and in the presence of blood proteins, strongly induced NF-B/AP-1 transcription factor activity and pro-inflammatory cytokine secretion in reporter …
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Cardioregulatory Role of the Abdominal Ganglion of APLYSIA CALIFORNICA
… with artificial sea water through an atrial cannula and the gastro-esophageal artery was catheterized for blood pressure monitoring. The presence and cardioregulatory effects of axons in the nerves was investigated by electrical stimulation. Fine-tipped glass microelectrodes inserted into …
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Combined effects of prozac and hypothalmic mediated response on masseter muscle activity in the cat
… - 3.4 kg) were utilized during the experiments. Cannula-electrodes were implanted into the medial hypothalamus for elicitation of defensive rage behavior. EMG activity was recorded with a bipolar electrode attached to the masseter muscle to establish baseline before the infusion of the drug. Mean …
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Ex-Vivo Slaughterhouse Porcine Crystalloid-Perfused Beating Heart via Langendorff Method
… cardioplegia was flushed antegrade with aortic cannula (Group 1) or coronary catheterization (Group 2). Each heart was kept in 4°C 1L modified Plegisol storage for >1 hour cold ischemic time prior to resuscitation. Hearts were submerged in 500mL of 15°C and 25°C Krebs Henseleit buffer prior to …
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Electrochemical and Magnetochemical Approaches for Neuronal Modulation
… injection of chemicals through an implanted cannula, 1) do not apply in the case of transient and unstable chemical species and 2) require tethering of animal subjects to external hardware, which can limit the study of freely-behaving subjects. By employing nanomaterials chemistry, …
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