Intraocular pressure changes: the McGrath video laryngoscope vs the Macintosh laryngoscope; a randomized trial.
OBJECTIVE
To determine the effects of the McGrath Series 5 video laryngoscope on intraocular pressure (IOP) during laryngoscopy.


METHODS
Prospective, randomized, double blind.


METHODS
Operating room.


METHODS
Eighty adult patients of American Society of Anesthesiologist physical status 1 scheduled for nonophthalmic elective surgery under general anesthesia.


METHODS
The endotracheal intubation was provided using McGrath series 5 video laryngoscope in MG group (n=40) or Macintosh laryngoscope in M group (n=40).


METHODS
The IOP of the right and left eyes was measured before and after the laryngoscopic process.


RESULTS
The mean arterial blood pressure values just before laryngoscopy and intubation and after intubation were 77.38±6.18 and 97.38±12.77 in the McGrath video laryngoscope group and 75.85±7.88 and 99.12±14.30 in the Macintosh laryngoscope group, respectively. The IOP values of the left eye after intubation and at the 5th and the 10th minutes in the Macintosh laryngoscope group were found to be significantly higher than those in the McGrath video laryngoscope group (P=.019, P=.019, and P=.007, respectively). In addition, the IOP values of the right eye were found to be higher after intubation and at the 5th and the 10th minutes in the Macintosh laryngoscope group, compared to the McGrath video laryngoscope group (P=.009, P=.021, and P=.011, respectively). The mean IOP values for the left eye just before laryngoscopy and intubation and after intubation were 10.65±2.52 and 15.57±3.62 in the McGrath video laryngoscope group, and for the right eye, they were 10.60±1.64 and 17.17±2.38 in the Macintosh laryngoscope group, respectively.


CONCLUSIONS
The McGrath Series 5 video laryngoscope may provide a lower IOP level compared to the Macintosh laryngoscope in an otherwise healthy, young patient population.
Department of Anesthesiology and Reanimation, Gaziosmanpasa University School of Medicine, Tokat, Turkey. Electronic address: drtugbaguler@hotmail.com.
Tugba
T
Karaman
Department of Anesthesiology and Reanimation, Gaziosmanpasa University School of Medicine, Tokat, Turkey. Electronic address: srkdgr1@yahoo.com.
Serkan
S
Dogru
Department of Anesthesiology and Reanimation, Gaziosmanpasa University School of Medicine, Tokat, Turkey. Electronic address: serkankaraman52@yahoo.com.
Serkan
S
Karaman
Department of Ophthalmology, Gaziosmanpasa University School of Medicine, Tokat, Turkey. Electronic address: dr.selimdemir@yahoo.com.
Selim
S
Demir
Department of Anesthesiology and Reanimation, Gaziosmanpasa University School of Medicine, Tokat, Turkey. Electronic address: zkayaahz@gmail.com.
Ziya
Z
Kaya
Department of Anesthesiology and Reanimation, Gaziosmanpasa University School of Medicine, Tokat, Turkey. Electronic address: mustafasuren@yahoo.com.
Mustafa
M
Suren
Department of Anesthesiology and Reanimation, Gaziosmanpasa University School of Medicine, Tokat, Turkey. Electronic address: semiharici@gmail.com.
Semih
S
Arici
Gumushacikoy State Hospital, Tokat, Turkey. Electronic address: drmurselkahveci@yahoo.com.
Mursel
M
Kahveci
Department of Ophthalmology, Gaziosmanpasa University School of Medicine, Tokat, Turkey. Electronic address: drsaitalim@gmail.com.
Sait
S
Alim
D000328:Adult; D000768:Anesthesia, General / Q000379:methods; D062186:Arterial Pressure; D004311:Double-Blind Method; D017558:Elective Surgical Procedures / Q000295:instrumentation / Q000379:methods; D004867:Equipment Design; D005260:Female; D006801:Humans; D007429:Intraocular Pressure; D007442:Intubation, Intratracheal / Q000379:methods*; D020704:Laryngoscopes; D007828:Laryngoscopy / Q000295:instrumentation / Q000379:methods*; D008297:Male; D011446:Prospective Studies; D014741:Video Recording; D055815:Young Adult
Anesthesia; Intraocular pressure; Ocular; Ocular hemodynamics; Tonometry