The laryngeal mask airway reduces blood flow in the common carotid artery bulb
| Autor: | Rory Page, Deirdre M O’Hanlon, F. Flanagan, D. C. Moriarty, Sallyann Colbert |
|---|---|
| Rok vydání: | 1998 |
| Předmět: |
Larynx
Adult Carotid Artery Diseases Male Arteriosclerosis Carotid Artery Common Surface Properties Hemodynamics Blood Pressure Laryngeal Masks Laryngeal mask airway medicine.artery medicine Humans Common carotid artery Aged business.industry Air Carotid sinus Age Factors General Medicine Blood flow Equipment Design Middle Aged Anesthesiology and Pain Medicine medicine.anatomical_structure Blood pressure Carotid Sinus Elective Surgical Procedures Regional Blood Flow Ultrasonography Doppler Pulsed Anesthesia Cuff Female business Blood Flow Velocity |
| Zdroj: | Canadian journal of anaesthesia = Journal canadien d'anesthesie. 45(1) |
| ISSN: | 0832-610X |
| Popis: | The introduction of the laryngeal mask airway (LMA) has had a major impact on anaesthetic practice in the last ten years. Previous authors have demonstrated pressures equivalent to mean arterial blood pressure within the cuff of the LMA. This study examined the effects of cuff inflation on the cross sectional area, flow and velocity of blood flow at the level of the carotid sinus. Seventeen patients scheduled to have LMAs inserted as part of routine anaesthetic management were recruited into the study. Measurements of the common carotid artery bulb area, peak velocity and blood flow were performed upon LMA cuff inflation and deflation using a 5 MHz pulse wave Doppler probe. Deflation of the cuff resulted in an increase in the cross sectional area (from 0.58 ± 0.05 to 0.64 ± 0.04 cm2;P < 0.005), an increase in blood flow (from 65.6 ± 5.6 to 73.9 ± 5.6 cm3· sec−1; P < 0.05) and a slight but non significant increase in velocity of blood flow. This study demonstrates that inflation of the cuff on the LMA results in a decrease in carotid bulb cross sectional area which results in a decrease in blood flow. |
| Databáze: | OpenAIRE |
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