eISSN: 1731-2515
ISSN: 0209-1712
Anestezjologia Intensywna Terapia
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3/2021
vol. 53
 
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abstract:
Original paper

Glottic views using a Miller size 0 blade are superior to those from a Macintosh size 0 blade in neonates: a randomized trial

Ayten Saracoglu
1
,
Jerrold Lerman
2
,
Haluk Kafali
3
,
Huseyin Canaz
3
,
Kemal T. Saracoglu
4

  1. Department of Anesthesiology and Intensive Care, Marmara University School of Medicine, Istanbul, Turkey
  2. Oishei Children’s Hospital, Jacob’s School of Medicine and Biomedical Sciences, University at Buffalo, New York, USA
  3. Bilim University Medical School, Istanbul, Turkey
  4. Health Sciences University Kartal Dr. Lutfi Kirdar Training and Research Hospital, Istanbul, Turkey
Anestezjologia Intensywna Terapia 2021; 53, 3: 246–251
Online publish date: 2021/10/27
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Introduction
Both the Miller and Macintosh blades are commonly used during laryngoscopy in infants and children, although the glottic views have not been compared in neonates. This study compared the glottic views with the Miller and Macintosh size 0 blades in neonates when the blades were placed above and below the epiglottis.

Material and methods
Forty anaesthetized and paralyzed neonates undergoing elective surgery were enrolled and randomized to either the Miller or Macintosh size 0 blade. Two glottic views were obtained in random order in each neonate and were photographed using the same blade: lifting the epiglottis first then the tongue base or vice versa. The percentage of glottic opening (POGO) scores were evaluated with each view. The POGO scores and cardiorespiratory variables were then analysed.

Results
The POGO scores using the Miller blade to lift both the epiglottis and the tongue base were similar, whereas the scores using the Macintosh blade to lift the epiglottis were greater than those to lift the tongue base. The POGO scores using the Miller blade in both positions were significantly greater than those using the Macintosh blade in the corresponding positions (P = 0.0001). The heart rate using the Miller blade was greater than that using the Macintosh blade (P = 0.0001).

Conclusions
In neonates, the glottic views using the Miller size 0 blade to lift both the epiglottis and the tongue base were deemed to be excellent and superior to those using the Macintosh blade in both positions.

keywords:

neonate, laryngoscope, laryngoscopy, glottic view
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