The Clarus Video System (Trachway) and direct laryngoscope for endotracheal intubation with cricoid pressure in simulated rapid sequence induction intubation: a prospective randomized controlled trial

Table 1 Demographic data, airway characteristics, complications and hemodynamic responses

	CVS-V group (n = 50)	CVS-L group (n = 50)	DL group (n = 50)	p value
Demographic data
Age (years)	46 ± 12	47 ± 14	48 ± 12	0.575
ASA class (I/II/III)	16/31/3	15/33/2	10/36/4	0.634
Gender (M/F)	23/27	29/21	24/26	0.437
Body height (cm)	163 ± 8	165 ± 8	163 ± 8	0.313
Body weight (kg)	66 ± 11	68 ± 12	65 ± 13	0.478
BMI (kg/m²)	25 ± 3	25 ± 3	24 ± 4	0.878
Airway characteristics
Mallampati classification (1/2/3/4)	8/16/20/6	12/17/12/9	12/11/19/8	0.512
Thyromental distance (cm)	6.5 ± 0.7	6.4 ± 0.7	6.6 ± 0.8	0.360
Interincisor distance (cm)	4.5 ± 0.8	4.6 ± 0.6	4.7 ± 0.6	0.304
Neck circumference (cm)	38 ± 5	39 ± 5	38 ± 4	0.431
Complications
Sore throat in the next day^a (n; none/mild/moderate/severe)	37/10/2/1	34/11/5/0	28/17/4/1	0.445
Mucosa injury	2	1	0	0.360
Hemodynamic response^b
Patients successfully intubated at the first attempt	49	44	49
Mean arterial pressure (mmHg)
Preinduction	98 ± 12	101 ± 15	98 ± 12	0.321
1 min after intubation	98 ± 23^c	107 ± 21	104 ± 22	0.164
5 min after intubation	74 ± 14	78 ± 16	77 ± 17	0.575
Heart rate (bpm)
Preinduction	74 ± 14	77 ± 12	70 ± 11	0.149
1 min after intubation	89 ± 15	94 ± 17	88 ± 14	0.571
5 min after intubation	84 ± 15	86 ± 16	81 ± 14	0.926

Values are shown as mean ± standard deviation or number
^a Sore throat was graded according to numerical rating scale (NRS): none, NRS = 0; mild, NRS = 1–3; moderate, NRS = 4–6; severe, NRS = 7–10
^b Analysis of hemodynamic response excluded patients who need second attempt. Preinduction variables are referred to as covariate of 1 min or 5 min after intubation variables in the analysis of covariance (ANCOVA). No significant hemodynamic response to endotracheal intubation was seen in any of the three groups
^c No statistical difference versus preinduction value within the group

ISSN: 1471-2253