Sökning: "Low-flow"

Visar resultat 1 - 5 av 31 avhandlingar innehållade ordet Low-flow.

  1. 1. Modern inhalation agents and effects of anaesthesia equipment during low-flow anaesthesia

    Detta är en avhandling från Department of Anaesthesiology and Intensive Care, Lund

    Författare :Anders Johansson; Lunds universitet.; Lund University.; [2003]
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Anestesiologi; intensive care; intensivvård; Anaesthesiology; humidity and temperature; heat and moisture exchanger; isoflurane; desflurane; sevoflurane; anaesthetics volatile; carbon dioxide absorber; Low-flow; re-breathing circle circuit;

    Sammanfattning : Popular Abstract in Swedish Lågflödesanestesi (reducerat färskgasflöde till 1,0 l/min) har fördelar genom att minska gaskostnader, reducera gasutsläpp till atmosfären samt öka befuktningen i andningsvägarna. Anestesiologin har under 1990-talet tillförts två nya inhalationsmedel, desfluran och sevofluran. LÄS MER

  2. 2. Cerebral perfusion in cardiac surgery : with special reference to circulatory arrest during profound hypothermia

    Detta är en avhandling från Stockholm : Karolinska Institutet, false

    Författare :Rafael Astudillo Ley; Karolinska Institutet.; Karolinska Institutet.; [1998]
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Cardiac surgery; hypothermia; circulatory arrest; cardiopulmonary bypass; cerebral blood flow; cerebral metabolism; cerebral oxygen consuption; cerebral lactate; retograde crebral perfusion; transcranial Doppler; S-100B;

    Sammanfattning : Thirty-nine pediatric and 82 adult patients were studied during cardiac surgery with cardio pulmonary bypass (CPB) performed with moderate hypothermia or with deep hypothermia and circulatory arrest (DHCA) with or-without retrograde cerebral perfusion (RCP). Cerebral blood flow (CBF) was estimated from Doppler measurements of the blood velocity in the middle cerebral artery (MCAv). LÄS MER

  3. 3. Conceptualization of solute transport using time domain reflectometry. A combined laboratory and field study

    Detta är en avhandling från Water Resources Engineering, Lund University

    Författare :Magnus Persson; Lunds universitet.; Lund University.; [1999]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Hydrogeologi; geographical and geological engineering; Hydrogeology; electrical conductivity; Solute transport; unsaturated zone; teknisk geologi; teknisk geografi; Geophysics; physical oceanography; meteorology; Geofysik; fysisk oceanografi; meteorologi;

    Sammanfattning : Solute transport in the unsaturated zone is a complex process. The first of the two objectives for this study was to examine how it could be conceptualized under different flow conditions. LÄS MER

  4. 4. Power Doppler - Principles and Potential Clinical Applications

    Detta är en avhandling från Uppsala : Institutionen för onkologi, radiologi och klinisk immunologi

    Författare :Anders Nilsson; Uppsala universitet.; [2003]
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Radiology; Ultrasonography; Doppler studies; Power Doppler; Volume flow; Radiologisk forskning; MEDICINE Physiology and pharmacology Radiological research; MEDICIN Fysiologi och farmakologi Radiologisk forskning;

    Sammanfattning : The purpose of this work was to: a) Determine whether the amount of colour in a power Doppler image is dependent on the angle between the examined vessel and the soundbeam and/or on the velocity of the flow within the vessel; b) Investigate if a dependency on flow velocity could be used for the detection of volume flow differences and c) Define clinical applications utilising the improved sensitivity to low flow of PD.In the experimental studies (study I and II) a silicon tube in a water bath was insonated, the insonation angle and the volume flow changed and the resulting images stored, transferred to a personal computer and analysed with regard to the amount of colour present in the image. LÄS MER

  5. 5. IMPROVED SUPPLY OF DISTRICT HEAT TO HYDRONIC SPACE HEATING SYSTEMS

    Detta är en avhandling från Uppsala : Institutionen för onkologi, radiologi och klinisk immunologi

    Författare :Patrick Lauenburg; Lunds universitet.; Lund University.; [2009]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; low return temperature; natural circulation; District heating; hydronic space heating;

    Sammanfattning : The studies presented in this thesis concern hydronic space heating systems connected via heat exchangers to a district heating network: referred to as an indirect connection. The objective has been to improve the reliability of district heat supplies and to lower the return temperature from consumer substations. LÄS MER