Computer Simulation of Intracranial Pressure Changes During Induction of Anesthesia

Bekker, Alex; Mistry, Amit; Ritter, Arthur; Wolk, S.; Turndorf, Herman

doi:10.1097/00008506-199904000-00001

Cited by 11 publications

(1 citation statement)

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“…During the surgery, serious pressure occurs on the tooth, jaw and tongue root. Laryngoscopy and tracheal intubation are known to raise sympathetic activity and ICP, both of which are easily tolerated by healthy patients (12). Proprioceptor stimulation at the base of the tongue during laryngoscopy raises systemic blood pressure, heart rate and plasma catecholamine concentrations (13).…”

Section: Discussionmentioning

confidence: 99%

Evaluation of the Effect of Suspension Laryngoscopy on Optic Nerve Sheath Diameter: An Observational Study

Buyukbezirci,

Arican,

Kolsuz Erdem

et al. 2024

JARSS

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Objective: Laryngoscopy is a procedure that induces hemodynamic alterations as well as increased intracranial pressure (ICP). Many procedures have examined ICP changes with optic nerve sheath diameter (ONSD) measurements. However, a small number of research has investigated the influence of suspension laryngoscopy on ONSD measurements. The present study has examined the effect of suspension laryngoscopy on ONSD measurements and ICP. Methods: The study included 50 patients, who were scheduled for suspension laryngoscopy. Optic nerve sheath diameter measurements were taken after anesthesia induction (T0), after intubation (T1), when the neck was in hyperextension at the start of the suspension laryngoscopy (T2), when the neck was in hyperextension at the end of the suspension laryngoscopy (T3), and 5 minutes after the suspension was terminated and the neck was brought to the straight position (T4). Results: The mean ONSD measurements were 3.8 ± 0.3 mm in T0, 4.0 ± 0.5 mm in T1, 5.1 ± 0.8 mm in T2, 5.1 ± 0.8 mm in T3 and 4.1 ± 0.5 mm in T4. The T1, T2, T3 and T4 values were considerably higher than the T0 values (p<0.05). There was no statistically significant correlation between suspension laryngoscopy time and ONSD measurements (R: -0.050, p: 0.729 - R: 0.089, p: 0.541). Conclusion: Suspension laryngoscopy causes a significant increase in ONSD measurements. Suspension time, on the other hand, does not lead to a progressive increase. Ending the suspension by straightening the neck at the end of the procedure permits ONSD measurements to approach the baseline values. Keywords: Suspension, laryngoscopy, intracranial pressure, optic nerve, ultrasonography

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Section: Discussionmentioning

confidence: 99%