Optimal anaesthetic depth for LMA insertion

Purpose: A fixed dose of propofol administered rapidly can be insufficient or in excess resulting in airway complications and haemodynamic disturbances. This study is designed to assess whether loss of motor response to jaw thrust can be a reliable clinical indicator of anaesthetic depth for larynge...

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Main Authors: Sudeep Krishnappa, Pankaj Kundra
Format: Article
Language:English
Published: Wolters Kluwer Medknow Publications 2011-01-01
Series:Indian Journal of Anaesthesia
Subjects:
Online Access:http://www.ijaweb.org/article.asp?issn=0019-5049;year=2011;volume=55;issue=5;spage=504;epage=507;aulast=Krishnappa
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author Sudeep Krishnappa
Pankaj Kundra
author_facet Sudeep Krishnappa
Pankaj Kundra
author_sort Sudeep Krishnappa
collection DOAJ
description Purpose: A fixed dose of propofol administered rapidly can be insufficient or in excess resulting in airway complications and haemodynamic disturbances. This study is designed to assess whether loss of motor response to jaw thrust can be a reliable clinical indicator of anaesthetic depth for laryngeal mask airway (LMA) insertion. Methods: One hundred and twenty ASA I and II patients scheduled for general anaesthesia on day care basis were randomly allocated into two groups. Following pre-oxygenation, anaesthesia was induced to accomplish LMA insertion either with a 3 mg/kg propofol (Group CD, n=60) or in dose to abolish jaw thrust response (Group JT, n=60). Mean arterial pressure (MAP) and heart rate were continuously monitored while LMA insertion conditions were recorded using 6 variable, 3 point score. Results: 85% patients developed apnea in group CD when compared to 2% in group JT, P<0.0001. Despite similar insertion score, propofol consumption was significantly more in group CD when compared to group JT. More than 20% fall of MAP from baseline was noted in group CD after induction but there was no significant hypotension at any time in group JT. Conclusion: Loss of motor response to jaw thrust provides satisfactory LMA insertion conditions.
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spelling doaj.art-d8aa29c3f7cd4bc883e2b5ff2c9b1a912022-12-21T23:59:27ZengWolters Kluwer Medknow PublicationsIndian Journal of Anaesthesia0019-50492011-01-0155550450710.4103/0019-5049.89887Optimal anaesthetic depth for LMA insertionSudeep KrishnappaPankaj KundraPurpose: A fixed dose of propofol administered rapidly can be insufficient or in excess resulting in airway complications and haemodynamic disturbances. This study is designed to assess whether loss of motor response to jaw thrust can be a reliable clinical indicator of anaesthetic depth for laryngeal mask airway (LMA) insertion. Methods: One hundred and twenty ASA I and II patients scheduled for general anaesthesia on day care basis were randomly allocated into two groups. Following pre-oxygenation, anaesthesia was induced to accomplish LMA insertion either with a 3 mg/kg propofol (Group CD, n=60) or in dose to abolish jaw thrust response (Group JT, n=60). Mean arterial pressure (MAP) and heart rate were continuously monitored while LMA insertion conditions were recorded using 6 variable, 3 point score. Results: 85% patients developed apnea in group CD when compared to 2% in group JT, P<0.0001. Despite similar insertion score, propofol consumption was significantly more in group CD when compared to group JT. More than 20% fall of MAP from baseline was noted in group CD after induction but there was no significant hypotension at any time in group JT. Conclusion: Loss of motor response to jaw thrust provides satisfactory LMA insertion conditions.http://www.ijaweb.org/article.asp?issn=0019-5049;year=2011;volume=55;issue=5;spage=504;epage=507;aulast=KrishnappaAnaesthesiageneral drugspropofol equipmentlaryngeal mask airway
spellingShingle Sudeep Krishnappa
Pankaj Kundra
Optimal anaesthetic depth for LMA insertion
Indian Journal of Anaesthesia
Anaesthesia
general drugs
propofol equipment
laryngeal mask airway
title Optimal anaesthetic depth for LMA insertion
title_full Optimal anaesthetic depth for LMA insertion
title_fullStr Optimal anaesthetic depth for LMA insertion
title_full_unstemmed Optimal anaesthetic depth for LMA insertion
title_short Optimal anaesthetic depth for LMA insertion
title_sort optimal anaesthetic depth for lma insertion
topic Anaesthesia
general drugs
propofol equipment
laryngeal mask airway
url http://www.ijaweb.org/article.asp?issn=0019-5049;year=2011;volume=55;issue=5;spage=504;epage=507;aulast=Krishnappa
work_keys_str_mv AT sudeepkrishnappa optimalanaestheticdepthforlmainsertion
AT pankajkundra optimalanaestheticdepthforlmainsertion