Haemodynamic changes with the laryngeal mask airway - off the cuff
| Autor: | Sallyann Colbert, D. C. Moriarty, Deirdre M O’Hanlon, F. Flanagan, Rory Page |
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| Rok vydání: | 1997 |
| Předmět: |
Larynx
Male medicine.medical_specialty Carotid Artery Common Population Hemodynamics Laryngeal Masks Laryngeal mask airway medicine.artery Internal medicine Medicine Humans Common carotid artery education Aged education.field_of_study business.industry Ultrasonography Doppler Blood flow medicine.anatomical_structure Anesthesiology and Pain Medicine Flow velocity Anesthesia Cuff Cardiology business Blood Flow Velocity |
| Zdroj: | European Journal of Anaesthesiology. 14:514-517 |
| ISSN: | 0265-0215 |
| DOI: | 10.1097/00003643-199709000-00006 |
| Popis: | The cross-sectional area of the common carotid artery bulb was measured using a 5 MHz pulse wave Doppler probe in a patient undergoing general anaesthesia using a laryngeal mask airway (LMA). A simultaneous measurement of blood velocity was performed to allow determination of the blood flow. Following inflation of the cuff on the LMA, the cross-sectional area of the right carotid artery bulb decreased from 1.09 to 0.89 cm 2 , flow velocity increased 120 to 176 cm s −1 and the blood flow increased from 130.8 to 156.6 cm 3 s −1 . On the left the cross-sectional area decreased from 1.16 to 1.13 cm 2 , the velocity increased 136 to 151 cm s −1 and the blood flow increased from 157·8 to 170·6 cm 3 s −1 . While a reduction in cross-sectional area was observed in the carotid bulb in this patient, this was accompanied by an increase in the velocity and a consequent increase in blood flow. In patients with atheromatous disease involving the carotid arteries this decrease in cross-sectional area may prove clinically significant. The use of the LMA may not be suitable for this population. |
| Databáze: | OpenAIRE |
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