Comparison of videolaryngoscopy and direct laryngoscopy for tracheal intubation in obstetrics: a mixed-methods systematic review and meta-analysis.
Comparaison de la vidéolaryngoscopie et de la laryngoscopie directe pour l’intubation endotrachéale en obstétrique : une revue systématique de méthodes mixtes et une méta-analyse.
Journal
Canadian journal of anaesthesia = Journal canadien d'anesthesie
ISSN: 1496-8975
Titre abrégé: Can J Anaesth
Pays: United States
ID NLM: 8701709
Informations de publication
Date de publication:
Apr 2021
Apr 2021
Historique:
received:
25
08
2020
accepted:
15
10
2020
revised:
14
10
2020
pubmed:
14
1
2021
medline:
24
4
2021
entrez:
13
1
2021
Statut:
ppublish
Résumé
The incidence of difficult and failed intubation is higher in obstetrical patients than in the general population because of anatomic and physiologic changes in pregnancy. Videolaryngoscopy improves the success rate of intubation and reduces complications when compared with direct laryngoscopy in adults; however, it is not known whether this extends to obstetrical surgery. The aim of this study was to examine the efficacy, efficiency, and safety of videolaryngoscopy compared with direct laryngoscopy in obstetrics. Central, CINAHL, Embase, MEDLINE and Web of Science databases were searched from inception to 27 May 2020 with no restrictions. Inclusion criteria included randomized-controlled trials (RCTs), observational studies, case series, and case reports that reported the application of videolaryngoscopy to intubate the trachea in pregnant patients having general anesthesia. Overall, four RCTs with 428 participants, nine observational studies, and 35 case reports/series with 100 participants were included. On meta-analysis of three trials, the co-primary outcomes of first-attempt success rate (risk ratio, 1.02; 95% confidence intervals [CI], 0.98 to 1.06; P = 0.29; I2 = 0%) and time to tracheal intubation (mean difference, 1.20 sec; 95% CI, -6.63 to 9.04; P = 0.76; I Evidence for the utility of videolaryngoscopy continues to evolve but supports its increased adoption in obstetrics where videolaryngoscopes should be immediately available for use as a first-line device. PROSPERO (CRD42020189521); registered 6 July 2020. RéSUMé: OBJECTIF: L’incidence des intubations difficiles et de leur échec est plus élevée chez les patientes obstétricales que dans la population générale en raison des changements anatomiques et physiologiques liés à la grossesse. Chez l’adulte, la vidéolaryngoscopie améliore le taux de réussite de l’intubation et réduit les complications par rapport à la laryngoscopie directe; cependant, nous ne savons pas si ces avantages s’étendent également à la population obstétricale. L’objectif de cette étude était d’examiner l’efficacité, l’efficience et la sécurité de la vidéolaryngoscopie par rapport à la laryngoscopie directe en obstétrique. Les bases de données Central, CINAHL, Embase, MEDLINE et Web of Science ont été recherchées de leur création jusqu’au 27 mai 2020 sans restriction. Les critères d’inclusion comprenaient les études randomisées contrôlées (ERC), les études observationnelles, les séries de cas et les présentations de cas rapportant l’application de la vidéolaryngoscopie pour intuber la trachée de patientes enceintes recevant une anesthésie générale. Quatre ERC comptant 428 participantes, neuf études observationnelles et 35 présentations/séries de cas comptant 100 participantes ont été incluses. En effectuant une méta-analyse de trois études, les critères d’évaluation co-primaires du taux de réussite de l’intubation à la première tentative (risque relatif, 1,02; intervalle de confiance [IC] 95 %, 0,98 à 1,06; P = 0,29; I Les données probantes concernant l’utilité de la vidéolaryngoscopie continuent d’évoluer mais appuient son adoption accrue en obstétrique, où des vidéolaryngoscopes devraient être immédiatement disponibles pour être utilisés comme dispositif de première ligne. ENREGISTREMENT DE L’éTUDE: PROSPERO (CRD42020189521); enregistrée le 6 juillet 2020.
Autres résumés
Type: Publisher
(fre)
RéSUMé: OBJECTIF: L’incidence des intubations difficiles et de leur échec est plus élevée chez les patientes obstétricales que dans la population générale en raison des changements anatomiques et physiologiques liés à la grossesse. Chez l’adulte, la vidéolaryngoscopie améliore le taux de réussite de l’intubation et réduit les complications par rapport à la laryngoscopie directe; cependant, nous ne savons pas si ces avantages s’étendent également à la population obstétricale. L’objectif de cette étude était d’examiner l’efficacité, l’efficience et la sécurité de la vidéolaryngoscopie par rapport à la laryngoscopie directe en obstétrique.
Identifiants
pubmed: 33438172
doi: 10.1007/s12630-020-01908-w
pii: 10.1007/s12630-020-01908-w
doi:
Types de publication
Journal Article
Meta-Analysis
Review
Systematic Review
Langues
eng
Sous-ensembles de citation
IM
Pagination
546-565Références
Juang J, Rodney RA, Dutton RP, Palanisamy A, Urman RD. Choice of anesthesia for cesarean delivery: an analysis of the National Anesthesia Clinical Outcomes Registry. Anesth Analg 2017; 124: 1914-7.
pubmed: 28098588
doi: 10.1213/ANE.0000000000001677
Traynor AJ, Aragon M, Ghosh D, et al. Obstetric Anesthesia Workforce Survey: a 30-year update. Anesth Analg 2016; 122: 1939-46.
pubmed: 27088993
doi: 10.1213/ANE.0000000000001204
Mendelson CL. The aspiration of stomach contents into the lungs during obstetric anesthesia. Am J Obstet Gynecol 1946; 52: 191-205.
pubmed: 20993766
doi: 10.1016/S0002-9378(16)39829-5
Quinn AC, Milne D, Columb M, Gorton H, Knight M. Failed tracheal intubation in obstetric anaesthesia: 2 year national case-control study in the UK. Br J Anaesth 2013; 110: 74-80.
pubmed: 22986421
doi: 10.1093/bja/aes320
Kinsella SM, Winton AL, Mushambi MC, et al. Failed tracheal intubation during obstetric general anaesthesia: a literature review. Int J Obstet Anesth 2015; 24: 356-74.
pubmed: 26303751
doi: 10.1016/j.ijoa.2015.06.008
Crosby ET, Cooper RM, Douglas MJ, et al. The unanticipated difficult airway with recommendations for management. Can J Anaesth 1998; 45: 757-76.
pubmed: 9793666
doi: 10.1007/BF03012147
Shiga T, Wajima Z, Inoue T, Sakamoto A. Predicting difficult intubation in apparently normal patients: a meta-analysis of bedside screening test performance. Anesthesiology 2005; 103: 429-37.
pubmed: 16052126
doi: 10.1097/00000542-200508000-00027
Delgado C, Ring L, Mushambi MC. General anaesthesia in obstetrics. BJA Educ 2020; 20: 201-7.
pubmed: 33456951
Cook TM, Woodall N, Frerk C; Fourth National Audit Project. Major complications of airway management in the UK: results of the Fourth National Audit Project of the Royal College of Anaesthetists and the Difficult Airway Society. Part 1: Anaesthesia. Br J Anaesth 2011; 106: 617-31.
Rose DK, Cohen MM. The airway: problems and predictions in 18,500 patients. Can J Anaesth 1994; 41: 372-83.
pubmed: 8055603
doi: 10.1007/BF03009858
Mushambi MC, Kinsella SM, Popat M, et al. Obstetric Anaesthetists’ Association and Difficult Airway Society guidelines for the management of difficult and failed tracheal intubation in obstetrics. Anaesthesia 2015; 70: 1286-306.
pubmed: 26449292
pmcid: 4606761
doi: 10.1111/anae.13260
Zaouter C, Calderon J, Hemmerling TM. Videolaryngoscopy as a new standard of care. Br J Anaesth 2015; 114: 181-3.
pubmed: 25150988
doi: 10.1093/bja/aeu266
Lewis SR, Butler AR, Parker J, Cook TM, Smith AF. Videolaryngoscopy versus direct laryngoscopy for adult patients requiring tracheal intubation. Cochrane Database Syst Rev 2016; . https://doi.org/10.1002/14651858.CD011136.pub2 .
doi: 10.1002/14651858.CD011136.pub2
pubmed: 27875631
pmcid: 6463903
Lucas DN, Vaughan DJ. Videolaryngoscopy and obstetric anaesthesia. Br J Anaesth 2017; . https://doi.org/10.1093/bja/aex289 .
doi: 10.1093/bja/aex289
pubmed: 28969336
Moher D, Liberati A, Tetzlaff J, Altman DG, PRISMA Group. Preferred reporting items for systematic reviews and meta-analyses: the PRISMA statement. Ann Intern Med 2009; 151: 264-9.
Sterne JA, Hernán MA, Reeves BC, et al. ROBINS-I: a tool for assessing risk of bias in non-randomised studies of interventions. BMJ J 2016; . https://doi.org/10.1136/bmj.i4919 .
doi: 10.1136/bmj.i4919
Sterne JA, Savović J, Page MJ, et al. RoB 2: a revised tool for assessing risk of bias in randomised trials. BMJ 2019; . https://doi.org/10.1136/bmj.l4898 .
doi: 10.1136/bmj.l4898
pubmed: 31533922
pmcid: 6749182
Levitan RM, Ochroch EA, Kush S, Shofer FS, Hollander JE. Assessment of airway visualization: validation of the percentage of glottic opening (POGO) scale. Acad Emerg Med 1998; 5: 919-23.
pubmed: 9754506
doi: 10.1111/j.1553-2712.1998.tb02823.x
Higgins JP, Green S, The Cochrane Collaboration. Cochrane Handbook for Systematic Reviews of Interventions Version 5.1.0. 2011. Available from URL: https://handbook-5-1.cochrane.org/ (accessed October 2020).
Higgins JP, Thompson SG. Quantifying heterogeneity in a meta-analysis. Stat Med 2002; 21: 1539-58.
pubmed: 12111919
doi: 10.1002/sim.1186
Cohn AI, Hart RT, McGraw SR, Blass NH. The Bullard laryngoscope for emergency airway management in a morbidly obese parturient. Anesth Analg 1995; 81: 872-3.
pubmed: 7574027
Dhonneur G, Ndoko S, Amathieu R, El Housseini L, Poncelet C, Tual L. Tracheal intubation using the Airtraq® in morbid obese patients undergoing emergency cesarean delivery. Anesthesiology 2007; 106: 629-30.
pubmed: 17325521
doi: 10.1097/00000542-200703000-00027
Duffield AT, Smith KA. Anesthetic management for cesarean delivery of a parturient with impetigo herpetiformis. A A Case Rep 2013; 1: 14-6.
pubmed: 25611605
doi: 10.1097/ACC.0b013e318291d219
Kariya N, Kimura K, Iwasaki R, Ueki R, Tatara T, Tashiro C. Intraoperative awake tracheal intubation using the Airway Scope
pubmed: 23659404
doi: 10.1177/0310057X1304100319
Radosevich MA, Finegold H, Goldfarb W, Troianos C. Anesthetic management of the pregnant burn patient: excision and grafting to emergency cesarean section. J Clin Anesth 2013; 25: 582-6.
pubmed: 23994700
doi: 10.1016/j.jclinane.2013.01.019
Wouters B, Sanford DB. Anesthetic management of a simultaneous emergency craniotomy and cesarean delivery. AANA J 2013; 81: 394-8.
pubmed: 24354077
Arici S, Dogru S, Karaman S. Palatal perforation with McGrath series 5 videolaryngoscope. J Anesth 2014; . https://doi.org/10.1007/s00540-013-1709-2 .
doi: 10.1007/s00540-013-1709-2
pubmed: 24077832
Loyd GE. GlideScope stylet associated with endotracheal tube T-connector split causing a breathing circuit leak. J Clin Anesth 2014; . https://doi.org/10.1016/j.jclinane.2014.04.001 .
doi: 10.1016/j.jclinane.2014.04.001
pubmed: 24875887
Nakao K, Komasawa N, Kusaka Y, Minami T. Rapid-sequence intubation in the left-lateral tilt position in a pregnant woman with premature placental abruption utilizing a videolaryngoscope. AJP Rep 2015; 5: e30-2.
pubmed: 26199794
pmcid: 4502628
doi: 10.1055/s-0034-1544109
Ni J, Luo L, Wu L, Luo D. The Airtraq
pubmed: 24331872
doi: 10.1016/j.ijoa.2013.08.014
Cronin J, Bazick Cuschieri H, Dong X, et al. Anesthesia considerations for cesarean delivery in a patient with Loeys-Dietz syndrome. A A Case Rep 2015; 4: 47-8.
pubmed: 25689361
doi: 10.1213/XAA.0000000000000114
Lagoy JS, Kofford ND, Gosselin BJ, Russell MA, Morley BD. Management of a parturient with diastrophic dysplasia. A A Case Rep 2015; 5: 6-8.
pubmed: 26125691
doi: 10.1213/XAA.0000000000000162
Gray K, Lucas DN, Robinson PN, et al. A case series of successful videolaryngoscopic intubations in obstetric patients. Int J Obstet Anesth 2009; 18: S12 (abstract).
Paek G, McConville S, Kennington K, Chortkoff BS. Unanticipated emergency cricothyrotomy in a healthy parturient. Anesth Analg 2015; 120: S459 (abstract).
Rosenbaum T, Rosenbaum ER, Lienhart KL, Choate AI. Obstetric anesthesia for harlequin ichthyosis: a unique challenge. A A Case Rep 2015; 4: 19-21.
pubmed: 25611001
doi: 10.1213/XAA.0000000000000113
Sirico A, Maruotti GM, Martinelli P, et al. Airway management with McGrath series 5 video laryngoscope in a woman with Klippel-Feil syndrome requiring urgent caesarean section. Int J Obstet Anesth 2015; 24: 286-8.
pubmed: 26096264
doi: 10.1016/j.ijoa.2015.04.004
Galey J, Bharadwaj S, Crimmins S, Hong CM, Malinow AM. Anesthetic implications of an obstetric patient with blue rubber bleb nevus syndrome. A A Case Rep 2016; 6: 146-9.
pubmed: 26579613
doi: 10.1213/XAA.0000000000000265
Coffman JC, Legg RL, Coffman CF, Moran KR. Lateral position for cesarean delivery because of severe aortocaval compression in a patient with Marfan syndrome: a case report. A A Case Rep 2017; 8: 93-5.
pubmed: 27898546
doi: 10.1213/XAA.0000000000000437
Laird A. The combination of paraplegia, respiratory failure, pregnancy and anaesthesia. Anaesthesia 2017; 72: 85 (abstract).
Maxey-Jones CL, Palmerton A, Farmer JR, Bateman BT. Difficult airway management caused by local anesthetic allergy during emergent cesarean delivery: a case report. A A Case Rep 2017; 9: 84-6.
pubmed: 28448320
doi: 10.1213/XAA.0000000000000533
Xiao W, Zhao L, Wang F, Sun H, Wang T, Zhao G. Total intravenous anesthesia without muscle relaxant in a parturient with amyotrophic lateral sclerosis undergoing cesarean section: a case report. J Clin Anesth 2017; 36: 107-9.
pubmed: 28183545
doi: 10.1016/j.jclinane.2016.10.009
Creaney M, Moriarty RM, Milner M, Murphy C. Dexmedetomidine, high-flow nasal oxygen and sugammadex-reversal of rocuronium: overcoming anaesthetic challenges in a parturient with congenital muscular dystrophy presenting for caesarean section. Int J Obstet Anesth 2018; 34: 108-12.
pubmed: 29544721
doi: 10.1016/j.ijoa.2018.02.003
Jadin S, Angle P, Berndl A. Anaesthetic management of a woman with limb-girdle muscular dystrophy for elective caesarean section. Int J Obstet Anesth 2018; 35: S57 (abstract).
Riada W, Ansari T. Effect of cricoid pressure on the laryngoscopic view by Airtraq in elective caesarean section: a pilot study. Eur J Anaesthesiol 2009; 26: 981-2.
doi: 10.1097/EJA.0b013e32832e9a32
Cesare AE, Rafer LC, Myler CS, Brennan KB. Anesthetic management for Ehlers-Danlos syndrome, hypermobility type complicated by local anesthetic allergy: a case report. Am J Case Rep 2019; 20: 39-42.
pubmed: 30626862
pmcid: 6335977
doi: 10.12659/AJCR.912799
Betkekar SA, Volikas I. Use of high flow nasal oxygen for management of pulmonary oedema in severe preeclampsia. Int J Obstet Anesth 2019; 39: S60 (abstract).
Kormendy F, Jordan PA, Kremin JT, Nel MR. Life-threatening bronchospasm mimicking oesophageal intubation during caesarean delivery. Int J Obstet Anesth 2019; 39: S60 (abstract).
Zbeidy R, Torres Buendia N, Souki FG. Anaesthetic management of a parturient with spondylothoracic dysostosis. BMJ Case Rep 2020; . https://doi.org/10.1136/bcr-2019-232964 .
doi: 10.1136/bcr-2019-232964
pubmed: 32675136
pmcid: 7035856
Dinges E, Ortner C, Bollag L, Davies J, Landau R. Osteogenesis imperfecta: cesarean deliveries in identical twins. Int J Obstet Anesth 2015; 24: 64-8.
pubmed: 25433579
doi: 10.1016/j.ijoa.2014.07.006
Turkstra TP, Armstrong PM, Jones PM, Quach T. GlideScope® use in the obstetric patient. Int J Obstet Anesth 2010; 19: 123-4.
pubmed: 19945851
doi: 10.1016/j.ijoa.2009.07.005
Browning RM, Rucklidge MW. Tracheal intubation using the Pentax Airway Scope videolaryngoscope following failed direct laryngoscopy in a morbidly obese parturient. Int J Obstet Anesth 2011; 20: 200-1.
pubmed: 21392963
doi: 10.1016/j.ijoa.2010.12.008
Mustapha B, Chkoura K, Elhassani M, Ahtil R, Azendour H, Kamili ND. Difficult intubation in a parturient with syringomyelia and Arnold-Chiari malformation: use of Airtraq
pubmed: 22144932
pmcid: 3227314
doi: 10.4103/1658-354X.87274
Shonfeld A, Gray K, Lucas N, et al. Video laryngoscopy in obstetric anesthesia. J Obstet Anaesth Crit Care 2012; . https://doi.org/10.4103/2249-4472.99330 .
doi: 10.4103/2249-4472.99330
Silva M, Swinson A, Halpern S, Margarido C. Transfusion-alternative strategies in a Jehovah’s Witness patient with placenta accreta and severe preeclampsia. Can J Anesth 2011; 58: S87 (abstract).
Chase CJ, Holak EJ, Pagel PS. Anesthetic implications of emergent cesarean section in a parturient with Noonan syndrome and bacterial endocarditis. J Clin Anesth 2013; 25: 403-6.
pubmed: 23965213
doi: 10.1016/j.jclinane.2012.11.016
Freedman RL, Paramanathan S, Lucas DN, Robinson PN. Failed intubations in obstetric anaesthesia: patient or staff factors? Int J Obstet Anesth 2016; 26: S24 (abstract).
Kimura F. The frequency of difficult airway in cesarean section under general anesthesia: a retrospective study in a teaching hospital in Japan. Anesth Analg 2016; 123: 259 (absract).
Fennessy AR, Chevannes CL, Djabatey EA. Videolarygoscopy as a rescue technique for difficult airways in obstetric anaesthesia. Int J Obstet Anesth 2017; 31: S46 (abstract).
Rajagopalan S, Suresh M, Clark SL, Serratos B, Chandrasekhar S. Airway management for cesarean delivery performed under general anesthesia. Int J Obstet Anesth 2017; 29: 64-9.
pubmed: 27884665
doi: 10.1016/j.ijoa.2016.10.007
John A, Hull T, Eccles J, Bhatia K. Difficult and failed intubation following general anaesthesia for caesarean section: incidence, management, maternal and neonatal outcomes. Int J Obstet Anesth 2019; 39: S14 (abstract).
Kelly FE, Penders R, Hughes J, et al. Implementation of universal videolaryngoscopy and development of intubation database accessed via a smart phone app. Trends Anaesth Crit Care 2020; 30: e151-2.
doi: 10.1016/j.tacc.2019.12.370
McLenachan J, Alexander N, Theodosiou K, Zhang C, McNarry A. McGrath MAC videolaryngoscope use in a tertiary obstetric unit. Trends Anaesth Crit Care 2020; 30: e106.
doi: 10.1016/j.tacc.2019.12.262
Aziz MF, Kim D, Mako J, Hand K, Brambrink AM. A retrospective study of the performance of video laryngoscopy in an obstetric unit. Anesth Analg 2012; 115: 904-6.
pubmed: 22763902
doi: 10.1213/ANE.0b013e3182642130
Kurvey A, Betharia V, McNamara G, Bewlay A, Pimblett M, Scullian K. GlideScope® video laryngoscopy is better than direct laryngoscopy in a simulated difficult obstetric airway. Int J Obstet Anesth 2016; 26: S42 (abstract).
Arici S, Karaman S, Doǧru S, et al. The McGrath series 5 video laryngoscope versus the Macintosh laryngoscope: a randomized trial in obstetric patients. Turkish J Med Sci 2014; 44: 387-92.
doi: 10.3906/sag-1306-71
Amini S, Shakib M. Hemodynamic changes following endotracheal intubation in patients undergoing cesarean section with general anesthesia: application of Glidescope® videolaryngoscope versus direct laryngoscope. Anesthesiol Pain Med 2015; . https://doi.org/10.5812/aapm.21836 .
doi: 10.5812/aapm.21836
Blajic I, Hodzovic I, Lucovnik M, Mekis D, Novak-Jankovic V, Stopar Pintaric T. A randomised comparison of C-MAC
pubmed: 30777368
doi: 10.1016/j.ijoa.2018.12.008
Toker MK, Altıparmak B, Karabay AG. Comparison of the McGrath video laryngoscope and Macintosh direct laryngoscope in obstetric patients: a randomized controlled trial. Pakistan J Med Sci 2019; 35: 342-7.
Archer GW Jr, Marx GF. Arterial oxygen tension during apnoea in parturient women. Br J Anaesth 1974; 46: 358-60.
pubmed: 4157184
doi: 10.1093/bja/46.5.358
Russell T, Khan S, Elman J, Katznelson R, Cooper RM. Measurement of forces applied during Macintosh direct laryngoscopy compared with GlideScope® videolaryngoscopy. Anaesthesia 2012; 67: 626-31.
pubmed: 22352799
doi: 10.1111/j.1365-2044.2012.07087.x
Salman MM, Goetze N, Badrinath M, Shah M. The videolaryngoscope as a first-line intubation device in women with hypertensive disease of pregnancy. Int J Obstet Anesth 2018; 33: 87-8.
pubmed: 28801160
doi: 10.1016/j.ijoa.2017.07.005
Cook TM, Kelly FE. A national survey of videolaryngoscopy in the United Kingdom. Br J Anaesth 2017; 118: 593-600.
pubmed: 28403414
doi: 10.1093/bja/aex052
Odor PM, Bampoe S, Moonesinghe SR, et al. General anaesthetic and airway management practice for obstetric surgery in England: a prospective, multicentre observational study. Anaesthesia 2020; . https://doi.org/10.1111/anae.15250 .
doi: 10.1111/anae.15250
pubmed: 33368153
Nørskov AK, Rosenstock CV, Wetterslev J, Astrup G, Afshari A, Lundstrøm LH. Diagnostic accuracy of anaesthesiologists’ prediction of difficult airway management in daily clinical practice: a cohort study of 188 064 patients registered in the Danish Anaesthesia Database. Anaesthesia 2015; 70: 272-81.
pubmed: 25511370
doi: 10.1111/anae.12955
Krom AJ, Cohen Y, Miller JP, Ezri T, Halpern SH, Ginosar Y. Choice of anaesthesia for category-1 caesarean section in women with anticipated difficult tracheal intubation: the use of decision analysis. Anaesthesia 2017; 72: 156-71.
pubmed: 27900760
doi: 10.1111/anae.13729
Hoshijima H, Kuratani N, Hirabayashi Y, Takeuchi R, Shiga T, Masaki E. Pentax Airway Scope® vs Macintosh laryngoscope for tracheal intubation in adult patients: a systematic review and meta-analysis. Anaesthesia 2014; 69: 911-8.
pubmed: 24820205
doi: 10.1111/anae.12705
Griesdale DE, Liu D, McKinney J, Choi PT. Glidescope® video-laryngoscopy versus direct laryngoscopy for endotracheal intubation: a systematic review and meta-analysis. Can J Anesth 2012; 59: 41-52.
pubmed: 22042705
doi: 10.1007/s12630-011-9620-5
Pieters BM, Maas EH, Knape JT, van Zundert AA. Videolaryngoscopy vs. direct laryngoscopy use by experienced anaesthetists in patients with known difficult airways: a systematic review and meta-analysis. Anaesthesia 2017; 72: 1532-41.
Su YC, Chen CC, Lee YK, Lee JY, Lin KJ. Comparison of video laryngoscopes with direct laryngoscopy for tracheal intubation: a meta-analysis of randomised trials. Eur J Anaesthesiol 2011; 28: 788-95.
pubmed: 21897263
doi: 10.1097/EJA.0b013e32834a34f3
Afshari A, Wetterslev J, Smith AF. Can systematic reviews with sparse data be trusted? Anaesthesia 2017; 72: 12-6.
pubmed: 27804113
doi: 10.1111/anae.13730