Search for dissertations about: "sinus ventilation"

Found 5 swedish dissertations containing the words sinus ventilation.

  2. 1. Ventilation of the Paranasal Sinuses. A study using the 133-Xenon Washout Technique

    Author : Bo Paulsson; Lund Institutionen för kliniska vetenskaper; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; auditive system and speech; single photon emission computed tomography; paranasal sinuses; ventilation; 133-xenon; chronic sinusitis; nose-sinus model; endoscopic sinus surgery; oxymetazoline; Otorhinolaryngology; Otorinolaryngologi; audiologi; hörsel- och talorganen; audiology;

    Abstract : A noninvasive 133-xenon washout technique was used to evaluate the ventilation of the paranasal sinuses in healthy subjects and in patients with sinus disease. A mixture of air and 133-xenon is insufflated into the nasal cavities and passage into the sinuses is facilitated by a pressure increase created by letting the subjects inflate a balloon. READ MORE

  4. 2. Humming, nitric oxide and paranasal sinus ventilation

    Author : Mauro Maniscalco; Karolinska Institutet; Karolinska Institutet; []
    Keywords : ;

    Abstract : The paranasal sinuses are air-filled bony cavities surrounding the nose. They communicate with the nose via the sinus ostia through which fluid and gases pass in both directions. A proper ventilation is crucial for sinus integrity and blockage of the ostia is a major risk factor for development of sinusitis. READ MORE

  5. 3. High-frequency positive-pressure ventilation and carotid-sinus nerve stimulation

    Author : Anders Jonzon; Uppsala universitet; []
    Keywords : MEDICINE; MEDICIN;

    Abstract : .... READ MORE

  6. 4. On the interaction between a neuromuscular blocking agent and regulation of breathing during hypoxia

    Author : Nicholas Wyon; Karolinska Institutet; Karolinska Institutet; []
    Keywords : Neuromuscular block; TOF ratio; vecuronium; ventilatory response; chemoreceptors; carotid body;

    Abstract : It was previously generally agreed that a mechanical train-of-four (TOF) ratio >0.70 represented an adequate recovery of respiratory function after neuromuscular blockade. Normal respiratory parameters at this level of recovery and during air breathing support this view. READ MORE

  7. 5. Photoplethysmography in multiparameter monitoring of cardiorespiratory function

    Author : Anders Johansson; Linköpings universitet; []
    Keywords : MEDICINE; MEDICIN;

    Abstract : Photoplethysmography (PPG) is an optical, non-invasive method to assess tissue blood volume/perfusion. When measured on human skin, the PPG signal includes both cardiac synchronous variations (AC) and respiratory induced intensity variations (RIIV). READ MORE