Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2015 Apr-Jun;9(2):195-8.
doi: 10.4103/1658-354X.152885.

Influence of GlideScope assisted endotracheal intubation on intraocular pressure in ophthalmic patients

Nauman Ahmad  1 , Abdul Zahoor  1 , Waleed Riad  2 , Saeed Al Motowa  3
Affiliations

Influence of GlideScope assisted endotracheal intubation on intraocular pressure in ophthalmic patients

Nauman Ahmad et al. Saudi J Anaesth. 2015 Apr-Jun.

Abstract

Background: Traditional Macintoch laryngoscopy is known to cause a rise in intraocular pressure (IOP), tachycardia and hypertension. These changes are not desirable in patients with glaucoma and open globe injury. GlideScope is a video laryngoscope that functions independent of the line of sight, reduces upward lifting forces for glottic exposure and requires less cervical neck movement for intubation, making it less stimulating than Macintosh laryngoscopy.

Aim: The aim was to assess the variations in IOP and hemodynamic changes after GlideScope assisted intubation.

Materials and methods: After approval of the local Institutional Research and Ethical Board and informed patient consent, 50 adult American Society of Anesthesiologist I and II patients with normal IOP were enrolled in a prospective, randomized study for ophthalmic surgery requiring tracheal intubation. In all patients, trachea was intubated using either GlideScope or Macintoch laryngoscope. IOP of nonoperated eye, heart rate and blood pressure were measured as baseline, 1 min after induction, 1 min and 5 min after tracheal intubation.

Results: IOP was not significantly different between groups before and after anesthetic induction and 5 min after tracheal intubation (P = 0.217, 0.726, and 0.110 respectively). The only significant difference in IOP was at 1 min after intubation (P = 0.041). No significant difference noted between groups in mean arterial pressure (P = 0.899, 0.62, 0.47, 0.82 respectively) and heart rate (P = 0.21, 0.72, 0.07, 0.29, respectively) at all measurements.

Conclusion: GlideScope assisted tracheal intubation shown lesser rise in IOP at 1 min after intubation in comparison to Macintoch laryngoscope, suggesting that GlideScope may be preferable to Macintosh laryngoscope.

Keywords: GlideScope; hemodynamic response; intraocular pressure; intubation.

PubMed Disclaimer

Conflict of interest statement

Conflict of Interest: None declared.

Figures

Figure 1
Figure 1
Intraocular pressure in nonoperated eye after GlideScope assisted endotracheal intubation versus conventional method
Figure 2
Figure 2
Mean arterial blood pressure after GlideScope assisted endotracheal intubation versus conventional method
Figure 3
Figure 3
Heart rate in after GlideScope assisted endotracheal intubation versus conventional method
See this image and copyright information in PMC

References

    1. Bukhari SA, Naqash I, Zargar J, Nengroo S, Mir AW. Pressor responses and intraocular pressure changes following insertion of laryngeal mask airway: Comparison with tracheal tube insertion. Indian J Anaesth. 2003;47:473–5.
    1. Tsai P, Chen B. Hemodynamic responses to endotracheal intubation comparing the airway scope ®, glidescope ®, and macintosh laryngoscopes. Internet J Anesthesiol. 2009;24:2.
    1. Kim HJ, Chung SP, Park IC, Cho J, Lee HS, Park YS. Comparison of the GlideScope video laryngoscope and Macintosh laryngoscope in simulated tracheal intubation scenarios. Emerg Med J. 2008;25:279–82. - PubMed
    1. Watcha MF, White PF, Tychsen L, Stevens JL. Comparative effects of laryngeal mask airway and endotracheal tube insertion on intraocular pressure in children. Anesth Analg. 1992;75:355–60. - PubMed
    1. Murgatroyd H, Bembridge J. Intraocular pressure. Contin Educ Anaesth Crit Care Pain. 2008;8:100–3.